ML14066A176

Attachment 7 - UHS Calculation LSCS Design Analysis L-002457, Revision 8, Part 1 of 2

ML14066A176
Person / Time
Site:	LaSalle
Issue date:	02/20/2014
From:	Exelon Generation Co
To:	Office of Nuclear Reactor Regulation
Shared Package
ML14066A250	List: ML14066A174 ML14066A176 RS-14-042, Attachment 7 - UHS Calculation LSCS Design Analysis L-002457, Revision 8, Part 1 of 2 RS-14-042, Attachment 7 - UHS Calculation LSCS Design Analysis L-002457, Revision 8, Part 2 of 2
References
CC-AA-309-1001, Rev. 8, RS-14-042 L-002457, Rev. 8
Download: ML14066A176 (396)

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ATTACHMENT 7 UHS Calculation Analysis L-002457, Revision 8 LSCS Design October 2, 2013 (NON-PROPRIETARY) 1,237 pages follow CC-AA-309-1001 Revision 8 ATTACHMENT 1 Design Analysis Cover Sheet Paae 1 of I Design Analysis I Last Page No. I Attachment P. Page P58 Analysis No.: L-002457 Revision:

1 8 Major [ Minor E)Title: 3 LaSalle County Station Ultimate Heat Sink Analysis EC!ECR No.:' 389270 Revision:

1 0 Station(s):.'

LaSalle County Station Component(s):

Unit No.: ' 1, 2 Discipline:

MEDC Descrip. Code/Keyword:"'

M03 Safety/QA Class: Safety-Related System Code: 2 ZZ Structure:

13 N/A CONTROLLED DOCUMENT REFERENCES 15 Document No.: From/To Document No.: From/To L-001 581 From L-002456 From L-001584 From L-001355 To L-002453 From / To Is this Design Analysis Safeguards Information? " Yes U No Z If yes, see SY-AA-101-106 Does this Design Analysis contain Unverified Assumptions? " Yes [U No 0 If yes, ATIIAR#: This Design Analysis SUPERCEDES:

8 N/A in its entirety.Description of Revision (list changed pages when all pages of original analysis were not changed):

1;Revision 8 adds evaluation of the UHS transient analyses with an allowable plant intake temperature of 107 0 F at a power level of 3559 MWt. This calculation considers weather selection methodology from Rev. 2 of Regulatory Guide 1.27 and a more realistic heat load rejected to the UHS.Pages Added: J33-40, N19-20,01-042, P1-P58 Pages Revised: 1-10, 13-35, 16, J18, N1-N2, N4-N8, N11-N12, N16-N18 Pages Removed: None Main Body (62 total pages) + Att. A (22) + Att. B (358) + Att. C (16) + Att. D (12) + Att. E (57) + Att. F (31) + Att.G (72) + Att. H (344) + Att. 1 (22) + Att. J (40) + Att. K (6) + Att. L (58) + Att. M (17) + Att. N (20) + Att. 0 (42) +Att. P (58) = 1,237 total pages Preparer:

Daniel W. Nevill (S&L) -LO Prnt Name Method of Review: 21 Reviewer:

2 Review Notes: 11 (For External Analyses Only)External Approver: Exelon Reviewer:

'2 Detailed Review Z Paul J Szymiczek (S&L)I Prioo Name Independent review [Peer review F I1 Pawel Kut (S&L)Pont Name P/int NMnma Pool Name Independent 3rd Party Review Reqd? -Exelon Approver:

7' "iyi'/A.4~ 'i 012,113 I HI -qa., tiaama Pont Name Date CC-AA-1 03-1003 Revision 9 Page 7 of 11 ATTACHMENT 2 Owner's Acceptance Review Checklist for External Design Analyses Page Ia Design Analysis No.: L-002457 Rev: 8 No Question Instructions and Guidance Ye/ No N/A Do assumptions have All Assumptions should be stated in clear terms with enough /JZ1 E sufficient documented justification to confirm that the assumption is conservative.

rationale?

For example, 1) the exact value of a particular parameter may not be known or that parameter may be known to vary over the range of conditions covered by the Calculation.

It is appropriate to represent or bound the parameter with an assumed value. 2) The predicted performance of a specific piece of equipment in lieu of actual test data. It is appropriate to use the documented opinion/position of a recognized expert on that equipment to represent predicted equipment performance.

Consideration should also be given as to any qualification testing that may be needed to validate the Assumptions.

Ask yourself, would you provide more justification if you were performing this analysis?

If yes, the rationale is likely incomplete.

Are assumptions Ensure the documentation for source and rationale for the 1E 2 compatible with the assumption supports the way the plant is currently or will be way the plant is operated post change and they are not in conflict with any operated and with the design parameters.

If the Analysis purpose is to establish a licensing basis? new licensing basis, this question can be answered yes, if the assumption supports that new basis.3 Do all unverified If there are unverified assumptions without a tracking assumptions have a mechanism indicated, then create the tracking item either tracking and closure through an ATI or a work order attached to the implementing mechanism in place? WO. Due dates for these actions need to support verification prior to the analysis becoming operational or the resultant plant change being op authorized.

4 Do the design inputs The origin of the input, or the source should be identified and / EL] L have sufficient be readily retrievable within Exelon's documentation system.rationale?

If not, then the source should be attached to the analysis.

Ask yourself, would you provide more justification if you were performing this analysis?

If yes, the rationale is likely incomplete.

5 Are design inputs The expectation is that an Exelon Engineer should be able to correct and reasonable clearly understand which input parameters are critical to the with critical parameters outcome of the analysis.

That is, what is the impact of a identified, if change in the parameter to the results of the analysis?

If the appropriate?

impact is large, then that parameter is critical.6 Are design inputs Ensure the documentation for source and rationale for the El D compatible with the inputs supports the way the plant is currently or will be way the plant is operated post change and they are not in conflict with any -t o operated and with the design parameters.

licensing basis? I@

CC-AA-103-1003 Revision 9 Page 8 of 11 ATTACHMENT 2 Owner's Acceptance Review Checklist for External Design Analyses Page lb Design Analysis No.: L-002457 Rev: 8 f No Question Instructions and Guidance Ye§/ N N/A 7 Are Engineering See Section 2.13 in CC-AA-309 for the attributes that are Judgments clearly sufficient to justify Engineering Judgment.

Ask yourself, documented and would you provide more justification if you were performing justified?

this analysis?

If yes, the rationale is likely incomplete.

8 Are Engineering Ensure the justification for the engineering judgment Judgments compatible supports the way the plant is currently or will be operated with the way the plant is post change and is not in conflict with any design operated and with the parameters.

If the Analysis purpose is to establish a new licensing basis? licensing basis, then this question can be answered yes, if the judgment supports that new basis.9 Do the results and Why was the analysis being performed?

Does the stated El 0 conclusions satisfy the purpose match the expectation from Exelon on the proposed purpose and objective of application of the results? If yes, then the analysis meets the Design Analysis?

the needs of the contract.10 Are the results and Make sure that the results support the UFSAR defined Z E E conclusions compatible system design and operating conditions, or they support a with the way the plant is proposed change to those conditions.

If the analysis operated and with the supports a change, are all of the other changing documents licensing basis? included on the cover sheet as impacted documents?

11 Have any limitations on Does the analysis support a temporary condition or E El El the use of the results procedure change? Make sure that any other documents been identified and needing to be updated are included and clearly delineated in transmitted to the the design analysis.

Make sure that the cover sheet appropriate includes the other documents where the results of this organizations?

analysis provide the input.12 Have margin impacts Make sure that the impacts to margin are clearly shown El El been identified and within the body of the analysis.

If the analysis results in documented reduced margins ensure that this has been appropriately appropriately for any dispositioned in the EC being used to issue the analysis.negative impacts (Reference ER-AA-2007)?13 Does the Design Are there sufficient documents included to support the , El Analysis include the sources of input, and other reference material that is not applicable design basis readily retrievable in Exelon controlled Documents?

documentation?

14 Have all affected design Determine if sufficient searches have been performed to El 0 analyses been identify any related analyses that need to be revised along documented on the with the base analysis.

It may be necessary to perform Affected Documents List some basic searches to validate this.(ADL) for the associated Configuration Change?15 Do the sources of inputs Compare any referenced codes and standards to the current and analysis design basis and ensure that any differences are reconciled.

methodology used meet If the input sources or analysis methodology are based on committed technical and an out-of-date methodology or code, additional reconciliation regulatory may be required if the site has since committed to a more requirements?

recent code CC-AA-1 03-1003 Revision 9 Page 9 of 11 ATTACHMENT 2 Owner's Acceptance Review Checklist for External Design Analyses Page Ic Design Analysis No.: L-002457 Rev: 8 No Question Instructions and Guidance Yes/No / N/A 16 Have vendor supporting Based on the risk assessment performed during the pre-job technical documents brief for the analysis (per HU-AA-1212), ensure that and references sufficient reviews of any supporting documents not provided (including GE DRFs) with the final analysis are performed.

been reviewed when necessary?

17 Do operational limits Ensure the Tech Specs, Operating Procedures, etc. contain support assumptions operational limits that support the analysis assumptions and I and inputs? inputs.Create an SFMS entry as required by CC-AA-4008.

SFMS Number: i11 I2-NOTE 1: LSCS IS CURRENTLY COMMITTED TO REV. 1 OF REGULATORY GUIDE (RG) 1.27 PER UFSAR REV. 19, APPENDIX B. PER LAR RAI DATED JUNE 27, 2013, THE NRC DEEMED USE OF REV. 2 TO RG 1.27 AS ESSENTIAL.

ý, 1, e -P-ý z EXELON REVIEWER: 'Ds1"" CA?-. 3DAE 10_4 DATE: U U ICALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 2 CALCULATION TABLE OF CONTENTS SECTION: PAGE NO. [SUB-PAGE NO.COVER PAGE I OAR CHECKLIST la-Ic TABLE OF CONTENTS 2 1.0 PURPOSE / OBJECTIVE 4 2.0 METHODOLOGY AND ACCEPTANCE CRITERIA 8 2.4 IDENTIFICATION OF COMPUTER PROGRAMS 16 3.0 ASSUMPTIONS

/ ENGINEERING JUDGEMENTS 17 4.0 DESIGN INPUTS 20

5.0 REFERENCES

22 6.0 NUMERIC ANALYSIS 24 7.0 RESULTS AND CONCLUSIONS 28 (Page 59 -FINAL PAGE of Main Body)ATTACHMENTS PAGES Attachment A -UHSAVG Files Al -A22 Attachment B -LAKET-PC Output BI -B358 Attachment C -EXCEL Formulas Cl -C16 Attachment D -Attached References DI -D12 Attachment E -UHS Historical Operability El -E57 Attachment F -LAKET-PC Plot Data F1 -F31 Attachment G -LAKET-PC Analysis with Revised Decay Heat G 1 -G72 Ratios and Increased Initial Lake Temperature Attachment H -LAKET-PC Analysis with Increased Plant Inlet HI -H344 Temperature Requirement Attachment I -LAKET-PC Analysis for MUR PU and EPU 11-122 PROJECT NO. 11333-297 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 3 1 Attachment J -UHS Flow Path Analysis Attachment K -Preparation of Hourly Meteorological Data Attachment L -Plant Temperature Rise Attachment M -Weather File Creation Attachment N -LAKET Validation Attachment 0 -LAKET-PC Analysis for Rev. 2 of Reg. Guide 1.27 Attachment P -Plant Temperature Rise for Rev. 8 J 1-J40 K1-K6 L1-L58 M1-MI7 N 1 -N20 01-042 PI-P58 I.I PROJECT NO. 11333-297-CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 4 1.0 PURPOSE/OBJECTIVE The purpose of this calculation is to analyze the performance of the LaSalle County Station Ultimate Heat Sink (UHS). The calculation determines the design basis UHS performance for 30 days following an accident.

The lake dike is assumed to have failed, Unit 1 is postulated to undergo a loss of coolant accident (LOCA) with loss of off-site power (LOOP), while Unit 2 undergoes normal shutdown.

Worst-case weather conditions apply and no makeup water is credited.The S&L LAKET-PC computer program was utilized to determine the combined impact of power uprate and allowable sediment accumulation in the UHS. It was also used to perform analysis of maximum allowable initial UHS temperature to meet required UHS outlet temperatures.

1.1 Historical

Analyses This calculation has undergone a number of revisions to address various issues as they have arisen.Certain information from previous revisions has been retained for information or convenience.

Some of this information is historical but no longer represents design information.

The assembly of the calculation writeup is as follows: " Main Body -The main body of the calculation was essentially re-written and formatted in Rev. 5 issue. The main body of Rev. 5 is revised in Rev. 6 to add new cases for 12" sediment level. For Rev. 7, the main body is revised to include new cases for extended power uprate (EPU) at a maximum plant intake temperature of 104'F and 1077F and the latest weather data. In Rev. 8, the main body is revised to incorporate new analysis for a more realistic heat load rejected to the UHS and Rev. 2 of Reg. Guide 1.27." Attachment A -This attachment provides results of computer analysis of the approximately 50 years of weather data used in the analysis.

The computer program UHS-AVG is used to select limiting weather periods for peak lake temperature and maximum evaporation.

The method of selecting the limiting data and actual data is common to all revisions of the calculation up to Rev. 6. Selection of weather data for Rev. 7 is documented in Attachment M. Selection of weather data for Rev. 8 is documented in Attachment 0." Attachment B -This attachment provides LAKET analysis results for the Rev. 3 issue of the calculation.

This analysis supports limiting UHS temperatures of I 00°F." Attachment C -This attachment provides Excel spreadsheets and formulas used in computing (a)UHS area and volumes, and (b) CSCS temperature rise across the plant for the Rev. 3 calculation.

The CSCS temperature rise across the plant is revised in Rev. 7 and documented in Attachment L.The CSCS temperature rise across the plant is further revised in Rev. 8 and documented in Attachment P." Attachment D -This attachment provides attached references." Attachment E -This attachment provides an operability evaluation performed as a part of the Rev. 2 calculation." Attachment F -This attachment provides LAKET plot data used in Rev. 3." Attachment G -This attachment provides LAKET analysis of Rev. 4. This analysis supports limiting UHS temperature of 102 'F.PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 5" Attachment H -This attachment provides the LAKET analysis of Rev. 5. This analysis supports limiting UHS temperatures of 104 'F. Attachment H is revised in Rev. 6 to support 3 additional cases for 12" sediment level." Attachment I -This attachment provides the LAKET analysis of Rev. 7. This analysis supports limiting UHS temperatures of 107'F at Measurement Uncertainty Recapture Power Uprate (MUR PU) (3559 MW,) and EPU (4067 MW,) using Rev. 1 of Reg. Guide 1.27. Please note that the EPU cases do not represent current design basis since EPU was cancelled." Attachment J -This attachment is added in Rev. 7 to document the determination of the effective area and effective volume of the UHS. Rev. 8 includes additional information." Attachment K -This attachment is added in Rev. 7 to document the preparation of a new set of weather data using data from LaSalle Station and Peoria, IL from 1/1/1995 to 9/30/2010." Attachment L -This attachment is added in Rev. 7 to document calculation of the plant temperature rise at MUR PU and EPU power levels. Please note that the EPU cases do not represent current design basis since EPU was cancelled." Attachment M -This attachment is added in Rev. 7 to document creation of the worst weather and worst net evaporation LAKET weather files." Attachment N -This attachment is added in Rev. 7 to document validation of the LAKET computer program through comparison to NUREG-0693.

In Rev. 8, analysis of the UHS stratification is added to this attachment." Attachment 0 -This attachment provides the LAKET analysis of Rev. 8. This analysis incorporates more realistic heat loads rejected to the UHS as developed in Rev. 4 of L-002453 [Ref. 5.8d] and supports limiting UHS temperatures of 107'F at MUR PU (3559 MW,) using Rev. 2 of Regulatory Guide 1.27." Attachment P -This attachment is added in Rev. 8 to document calculation of the plant temperature rise at MUR PU (3559 MW,) power levels using the more realistic heat loads developed in Rev. 4 of L-002453 [Ref. 5.8d].Most of the information in these appendices represents historical analysis and no longer serves as the design basis. However, some information, such as the geometry for the UHS (area and volume versus siltation) is still retained as design input for the current analysis.1.2 Design Analysis for 102'F Inlet Temperature Limit In the Rev. 4 calculation, two issues were addressed: " The allowable maximum plant inlet temperature was raised to 102'F and maximum initial UHS temperatures were determined based on the new limit." Core decay heat was increased to include contributions for additional actinides and activation products as documented in a separate calculation

[Ref. 5.8].The supporting analysis for these changes is documented in Appendix G.I PROJECT NO. 11333-297

-

I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 6 11 1.3 Design Analysis for 1047F Inlet Temperature Limit The Rev. 5 calculation addresses: " An increase in the allowable maximum plant inlet temperature to 104'F" Attachment H documents this analysis and determines the maximum initial UHS temperature for a plant inlet temperature limit of 104'F. Several different test case scenarios were evaluated and the maximum initial UHS temperature allowed was determined for each. In addition, Appendix H also documents the following:

4 The Attachment H analyses use a new version of the LAKET software, although the underlying algorithms are unchanged.

Test cases were run with the new code to confirm matching results from the previous version.4 In addition, a new evaporation case was run with the new limiting initial temperature to confirm there is adequate inventory.

+ Finally, it was confirmed and documented that the previous design basis for CSCS heat load includes a conservative modeling of pump heat and single failure assumptions.

The Rev. 6 calculation addresses: " Incorporation of minor Rev. 5A into the main body of the report. In Rev 5A, the UHS requirement for use of fire water during accident and transient conditions was revised from 132,000 gals to 440,400 gals. This was incorporated into Assumption 3.7, UHS Inventory for Fire-Fighting." The addition of three (3) new cases to evaluate the maxinmun initial lake temperature and evaporation based on 12 inches of sedimentation to the cases presented in Rev. 5 based on existing maximum plant inlet temperature of 104'F. The main body and Attachment H are revised to support the analyses of these new cases.1.4 Design Analysis for 1041F and 107'F Inlet Temperature Limit Using Latest Weather Data up to September 2010 The Rev. 7 calculation addresses: " An allowable maximum plant inlet temperature of 104'F and an increase in the allowable maximum plant inlet temperature to 107'F for both MUR PU and EPU." Addition of new weather data from LaSalle Station from January 1, 1995 to September 30, 2010.* New determination of effective area and effective volume as a percentage of the total UHS area and total UHS volume.* Incorporation of the UHS requirement for use of fire water during accident and transient conditions of 440,400 gallons. InI previous revisions, this had been deemed insignificant in an assumption.

For this revision the assumption has been removed, and the 440,400 gallons is removed immediately following the postulated accident." Increased core decay heat as a result of EPU.* Incorporation of spent fuel pool makeup flow from the UHS (600 gpm).I PROJECT NO. 11333-297 1I I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 7 11 1.5 Design Analysis for 107'F Inlet Temperature using Revised Rejected Heat Load to the UHS The Rev. 8 calculation addresses:

• A revised plant temperature rise calculation (see Attachment P) based on more realistic heat loads rejected to the UHS as developed in L-002453 [Ref. 5.8d]." A revised methodology for selection of weather data based on Rev. 2 of Regulatory Guide 1.27 [Ref.5.2]." Removal of spent fuel pool makeup flow from the UHS (600 gpm).1.6 Classification, etc.This calculation is safety related.This mechanical calculation provides an unsteady thermal model that is used to determine the capacity of the LaSalle Station ultimate heat sink (UHS), a safety related structure.

Description Code: M03 (mechanical system capacity calculation)

System Code: ZZ I PROJECT NO. 11333-297 11 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 8 2.0 METHODOLOGY AND ACCEPTANCE CRITERIA This calculation detenrmines the maximum allowable initial lake temperature that would support the 107TF CSCS maximum intake temperature limit for response to a postulated LOCA concurrent with the failure of the lake dike. The maximum allowable lake temperature is determined for average sediment accumulations of 0, 6, 12, and 18 inches.(Other analyses supporting lower CSCS maximum intake temperatures are also documented as described in Section 1).2.1 Methodology The method of analysis used in this calculation conforms to the position described in U.S. Atomic Energy Commission Regulatory Guide 1.27, "Ultimate Heat Sink for Nuclear Power Plants", Revision 1 [Ref. 5.2].The LaSalle Station is licensed to this version of the Reg. Guide. The USNRC has also issued a revision to this Reg. Guide (Rev. 2) to address Ultimate Heat Sinks with different configurations than the base configuration inherently assumed in the approach to modeling weather data per the Rev. I guide. In particular, the Rev. 2 guide addresses UHS designs with larger inventories with a transit time on the order of five days. The LaSalle UHS has a transit time of approximately one to two days. Analysis to Rev. 2 of the Reg. Guide [Ref. 5.2] was added in Rev. 5 and Rev. 6 of this calculation to conservatively supplement the design analysis per Rev. 1. Rev. 7 analysis only considers the methodology given in Rev. 1 of the Reg.Guide [Ref. 5.2]. Rev. 8 analysis uses the methodology of Rev. 2 of the Reg. Guide [Ref. 5.2] by considering the worst weather periods corresponding to the transit time of the UHS when selecting weather data.Using this guidance, the worst synthetic weather period is assembled and used to analyze the transient temperature performance of the UHS using the LAKET computer program. For the selected time periods, the weather data is comprised of dry bulb temperature, humidity, wind speed, cloud cover, rainfall, and solar radiation variables that give rise to maximum water temperatures.

Similarly, the consecutive 30-day maximum evaporation weather period is also evaluated to determine the impact of water inventory loss on UHS performance.

2.1.1 Selection

of Weather Data following R.G. 1.27, Rev. I (Peak Temperature)

Up to Revision 6 -R.G. 1.27, Rev. 1 guidance requires synthesis of the worst 31 day (worst 1-day + worst 30 consecutive days) weather period. The UHSAVG program [Ref. 5.7] is used to determine the worst I day and 30 day temperature periods. The weather data file contains weather station data from Peoria, IL and Springfield, IL for the dates between July 4, 1948 through June 30, 1996. The binary weather data file (pslsw-2.bin) for this historical worst weather period is documented in Appendix A of calculation L-00158 1, Rev. 0 [Ref. 5.4]. From the new, expanded weather data set, the worst single day is now July 15 to 16, 1995 while the worst thirty day period is from July 10, 1983 to August 9, 1983.Revision 7 -The methodology used to determine the worst I day and 30 day temperature periods is documented in Attachment M. The worst weather is determined from two different weather files. The first weather data file considered is the one used in previous revisions of this calculation including weather station data from Peoria, IL and Springfield, IL for the dates between July 4, 1948 through June 30, 1996.The second weather data file contains weather station data from LaSalle Station and Peoria, IL from January 1, 1995 to September 30, 2010. The worst single day is determined to be July 24, 2001 7:00AM to PROJECT NO. 11333-297 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 9 1 July 25, 2001 6:00AM while the worst thirty day period is from July 21, 1995 4:00PM to August 20, 1995 3:00PM.Revision 8 -Weather data selection following R.G. 1.27, Rev. 1 is not considered in this revision.2.1.2 Selection of Weather Data following R.G. 1.27, Rev. 2 (Peak Temperature)

Up to Revision 7 -Selection of weather data following Reg. Guide (R.G.) 1.27, Rev. 2 is used for Rev. 5 and Rev. 6 of this calc. New selection of weather data for this Reg. Guide was not done for Rev. 7. The UHSAVG program [Ref. 5.71 is used to determine the worst 5 consecutive days, worst 1 day, and worst 30 consecutive days temperature period. The weather data file contains weather station data from Peoria, IL and Springfield, IL for the dates between July 4, 1948 through June 30, 1996. The worst 36-day period is documented in Attachment A of this calculation.

The worst five day period is from July 12, 1995 to July 17, 1995. The worst one day and thirty day periods are the same as identified in Section 2.1. 1.Revision 8 -R.G. 1.27 Rev. 2 requires weather data selected based on the worst weather over the UHS transit time, the worst one day weather, and the worst 30 day weather. Alternatively, the worst consecutive day weather over a time period equal to the UHS transit time plus one day plus 30 days may be considered.

This revision considers both alternatives.

The selection of weather data from LaSalle Station and Peoria, IL from January 1, 1995 to September 30, 2010 based on the R.G. 1.27 Rev 2 methodology is documented in Section 06.4 of Attachment 0.2.1.3 Selection of Weather Data following R.G. 1.27, Rev. 1 (Peak Evaporation)

Guidance for selecting weather data for use in computing peak UHS evaporation over a thirty day period is based on R.G. 1.27, Rev. 1, although requirements from Rev. 2 are virtually the same. The limiting evaporation period is from June 18, 1954 to July 18, 1954. Additional information is provided in Attachment A of this calculation.

Following the addition of the new weather data (LaSalle Station and Peoria, IL weather data from 1/1/1995 to 9/30/2010) it was confirmed that the limiting evaporation period from June 18, 1954 to July 18, 1954 remains the limiting evaporation period. See Attachment M for documentation of this analysis.2.1.4 Plant Heat Load to the UHS The heat load to the UHS is documented in a separate calculation

[Ref. 5.8]. This data is interpolated to fit the one-hour (three-hour up to Rev. 6) time increments required by LAKET. The CSCS temperature rise data for each one-hour (three-hour up to Rev. 6) increment is based on this heat load and computed and listed in Attachment P of this calculation.

Attachment L calculated the CSCS temperature rise for EPU based on previous revision of the plant heat load calculation, L-002453 [Ref. 5.8]. It is not used in Rev. 8, but is kept for historical purposes.2.1.5 UHS Surface and Volume Data The approximate surface area and volume of the UHS for different postulated sediment accumulations is determined using the methodology documented in Appendix B of calculation L-001581, Rev. 0 [Ref. 5.4].The UHS surface area and volume are provided in Table 7.1. The effective area and effective volume of the UHS are determined in Attachment J.I PROJECT NO. 11333-297 I

I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 10 I CACLTO O -047RVSO O AEN.1 2.1.6 CSCS Temperature Rise The temperature rise through the plant is used in LAKET-PC to compute the rise in water temperature caused by the heat rejected to the UHS during the postulated accident.

It is determined by the following:

AT = Q / (cp x m)where: AT = plant temperature rise, ['F]Q = heat rejection to the UHS, [Btu!hr]cp = specific heat of water, [Btu/(lb-°F)]

m = mass flow rate of water, [lb/hr]The mass flow rate is determined from the CSCS volumetric flow rate in cfs: m = 86.0 ft 3/sec x 3600 sec/hr x 62.02 lb/ft 3 = 19,201,392 lbm/hr (Up to Rev. 6)in = 86.0 ft 3/sec x 3600 sec/hr x 62.00 lb/ft 3 = 19,195,200 Ibm/hr (Rev. 7 and 8)m = 65.3 ft 3/sec x 3600 sec/hr x 62.00 lb/ft 3 = 14,574,960 Ibm/hr (Rev. 8)The time increment for much of the weather data is three hours (one hour for Revisions 7 and 8). Since the temperature of the UHS does not change significantly over a three hour (or one hour) time period, it is sufficiently accurate to apply this time increment to calculate the average temperature rise for each time step.2.1.7 UHS Analysis for a 102'F Plant Inlet Temperature Limit Attachment G evaluates the ability of the UHS to maintain the plant inlet temperature below 102'F for the worst 31-day transient and worst 36-day transient analyses.

The following cases are run as part of Attachment G: Revision 4 (see Attachment G)I I Case Start Weather Time Data Sediment Level (in.)Methodology Design Criteria 00 10 0 Re Gud 1.27, Rev. Assume Initial UHS Temp = 100°F;09:0 1/3 0 eg. uide1.2, Re. 1 Verify Plant Inlet Temp!< 102.0°F-i Assume Initial UHS Temp = 100°F;2 09:00 5/1/30 6 Reg. Guide 1.27. Rev. 2 Verify Plant Inlet Temp < 102.0°F 3GAssume Initial UHS Temp = 100'F;3 09:00 1/30 18 Reg. Guide 1.27, Rev. 1 Verify Plant Inlet Temp < 102.0 0 F 4 06:00 1 1/30 18 Reg. Guide 1.27, Rev. 1 Assume Initial UHS Temp = 100'F;Verify Plant Inlet Temp < 102.0°F 2.1.8 UHS Analysis for a 104'F Plant Inlet Temperature Limit Attachment H evaluates the ability of the UHS to maintain the plant inlet temperature below 1047F for the worst 31-day transient, worst 36-day transient, and also documents the worst 30-day evaporation period analyses.

There are total 9 cases in Rev. 5 and 3 cases in Rev. 6. All 12 cases are included as part of I ~PROJECT NO. 11333-297 1

I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 11 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 11 11 Attachment H and summarized below: Revision 5 (see Attachment H)Case Start Weather Data Time la 09:00 1/30 Sediment Level (in.)0 6 18 Methodology 2a 3a 09:00 1/30 09:00 I 1/30 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Design Criteria Maximize Initial UHS Temp;Requires Plant Inlet Temp <__ 104.0°F Maximize Initial UHS Temp;Requires Plant Inlet Temp < 104.0°F Maximize Initial UHS Temp;Requires Plant Inlet Temp < 104.0°F lb 0:00I 5//300 Rg. Gide1.27 Re. 2Maximize Initial UHS Temp;lb 0:00 eg. uid 1.2. Re. 2Requires Plant Inlet Temp!< 104.0°F Maximize Initial UHS Temp;lb 09:00 5/1/30 0 Reg. Guide 1.27. Rev. 2 Requires Plant Inlet Temp - 104.0 0 F 2b 09:00 5/1/30 6 Reg. Guide 1.27. Rev. 2 Maximize Initial UHS Temp;g u e Requires Plant Inlet Temp _ 104.0°F 3b 090 [ 1 2 e.2Maximize Initial UHS Temp;5/1 -. Rg. GuideRequires Plant Inlet Temp<104.0°F ic Ic 2c 3c 09:00 Worst 30-day Evaporation 09:00 Worst 30-day Evaporation 09:00 Worst 30-day Evaporation 0 6 Reg. Guide 1.27. Rev. 1 Reg. Guide 1.27. Rev. 1 Reg. Guide 1.27. Rev. 1 Use limiting initial temperature from Case la or lb Use limiting initial temperature from Case 2a or 2b Use limiting initial temperature from Case 3a or 3b 18 LAKET-PC [Ref. 5.ld] and UHSAVG [Ref. 5.7] are filed and documented in the Sargent & Lundy Computer Software Library. UHS model runs were performed on PC Nos. 5121 and 5407 via network server SNLI for Rev. 5.Revision 6 -Revision 6 of this calculation utilizes the same methodology Rev. 5 and is presented in Attachment H. Additional cases 4a, 4b and 4c were run to find the maximum initial UHS temperature for a sediment level of 12 inches.Revision 6 (see Attachment H)Case Start Weather Data Time 4a 09:00 1/30 Sediment Level (in.)12 Methodology Design Criteria Maximize Initial UHS Temp;Requires Plant Inlet Temp < 104.0°F g GMaximize Initial UHS Temp;Reg. Guide 1.27. Rev. 2 Requires Plant Inlet Temp < 104.0°F Reg. Guide 1.27. Rev. 1 Use limiting initial temperature from.iCase 4a or 4b.4b 09:00 5/1/30 12 4c 09:00 Worst 30-day Evaporation 12 LAKET-PC [Ref. 5.1d] is filed and documented in the Sargent & Lundy Computer Software Library. UHS model runs were performed on PC No. ZL4578 for Rev. 6.1 PROJECT NO. 11333-297 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 12 I i CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 122 11 2.1.9 UHS Analysis for a 104'F and 107'F Plant Inlet Temperature Limit at MUR PU and EPU Attachment I evaluates the ability of the UHS to maintain the plant inlet temperature below 104'F or 107'F for the worst 3 1-day transient and also documents the worst 30-day evaporation period analyses.

The cases are run for both MUR PU and EPU power levels, and all cases use the Reg. Guide 1.27, Rev. I methodology.

All cases are included as part of Attachment I and sunmmarized below: Revision 7 (see Attachment I)Case Start Time Weather Data Power Level Sediment i .(MWt) Level (in.)Maximize Initial UHS Temp;4067 (EPU) 0 Requires Plant Inlet Temp < 107.0°F la 6:00 1/30 4 0 Maximize Initial UHS Temp;la-104F 6:00 1/30 4067 (EPU) 0 Requires Plant Inlet Temp < 104.0°F-FMaximize Initial UHS Temp;laMUR 6:00 1/30 3559 (MUR PU) 0 Requires Plant Inlet Temp < 107.0 0 F Maximize Initial UHS Temp;laMUR_104F 6:00 1/30 3559 (MUR PU) 0 Maxiize InleH Temp;Requires Plant Inlet Temp 104.0 0 F Maximize Initial UHS Temp;2a 6:00 1/30 4067 (EPU) 6 Requires Plant Inlet Temp _ 107.0°F S 64Maximize Initial UHS Temp;1 6:00 1/30 4067 (EPU) 6 2a_104 :Requires Plant Inlet Temp:_ 104.0 F , I .Maximize Initial UHS Temp: 2aMUR t_6:00 1/30 3559 (MUR PU) 6 Requires Plant Inlet Temp_< 107.0°F 6Maximize Initial UHS Temp;2a_MUR_104F 6U Requires Plant Inlet Temp < 104.0 0 F 3a_12am 0:00 1/30 4067 (EPU) 18 Maximize Initial UHS Temp;MaximizeeIiilUH ep 3a0 1/30 4067 (EPU) 18 Requires Plant Inlet Temp _< 107.01F Maximize Initial UHS Temp;3a_12am 6:0 13407(P)8 3a_3am 36:00 1/30 4067 (EPU) Requires Plant Inlet Temp < 107.0OF 3a9am 9:00 1/30 4067 (EPU) 18 Maximize Initial UHS Temp;3a_ am I ,o i Requires Plant Inlet Temp < 107.0°F 3a_12pm 12:00 1/30 4067 (EPU) 18 4067 (EPU) 18 Maximize Initial UHS Temp;Requires Plant Inlet Temp _ 107.0°F 3a_3pm 15:00 1/30 3a_6pm 3a_9pm 3a_104F 18:00 21:00 6:00 1/30 4067 (EPU) 18 1/30 4067 (EPU) 18 1/30 4067 (EPU) 18 Maximize Initial UHS Temp;Requires Plant Inlet Temp < 107.0°F Maximize Initial UHS Temp;Requires Plant Inlet Temp < 107.0°F Maximize Initial UHS Temp;Requires Plant Inlet Temp < 107.0°F Maximize Initial UHS Temp;Requires Plant Inlet Temp _ 104.0°F I PROJECT NO. 11333-297

-

I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 13 11 I CACLTO O -047RVSO O AEN.1 I Case 3aMUR Start Time 6:00 Weather Data 1/30 Power Level Sediment Design Criteria (MWt) Level (in.)5 1 Maximize Initial UHS Temp;Requires Plant Inlet Temp _ 107.0°F Maximize Initial UHS Temp;3559 (MUR PU) 18 Requires Plant Inlet Temp _< 104.0°F 6:00 1/30 3aMUR_104F 4a 6:00 1/30 4a_104F 4aMUR 6:00 6:00 1/30 1/30 4067 (EPU) 12 4067 (EPU) 12 3559 (MUR PU) 12 Maximize Initial UHS Temp;Requires Plant Inlet Temp < 107.0°F Maximize Initial UHS Temp;Requires Plant Inlet Temp < 104.0°F Maximize Initial UHS Temp;Requires Plant Inlet Temp < 107.0°F+4aMUR_104F 6:00 0:00 1c 2c 0:00 3c 0:00 1/30 Worst 30-day Evaporation Worst 30-day Evaporation Worst 30-day Evaporation 3559 (MUR PU)4067 (EPU) 0 Use limiting LAKET input initial temperature from Case la 6 6 Use limiting LAKET input initial temperature from Case 2a 1 Use limiting LAKET input initial 4067 (EPU) 18 temperature from Case 3a 12 Maximize Initial UHS Temp;Requires Plant Inlet Temp < 104.0°F 4c 0:00 1c_104F 0:00 Ic_MUR 0:00 lc_MUR_104F 0:00 Worst 30-day Evaporation Worst 30-day Evaporation Worst 30-day Evaporation Worst 30-day Evaporation 4067 (EPU) 12 Use limiting LAKET input initial temperature from Case 4a 4067 (EPU) 0 Use limiting LAKET input initial temperature from Case Ia_104F Use limiting LAKET input initial 3559 (MUR PU) 0 temperature from Case laMUR 3559 (Use limiting LAKET input initial 9(MUR PU) temperature from Case la_MUR_104F 2.1.10 UHS Analysis for a 107'F Plant Inlet Temperature Limit at MUR PU Attachment 0 evaluates the ability of the UHS to maintain the plant inlet temperature below 107'F for the worst 33 consecutive day transient and also documents the worst 30-day evaporation period analyses.

The cases are run for MUR PU power levels, and all cases use the Reg. Guide 1.27, Rev. 2 methodology.

All cases are included as part of Attachment 0 and summarized below:.Revision 8 (see Attachment 0)Case Case la_12AM Weather Data 33 Power Level (MWt)3559 (MUR PU)Sediment Level (in.)0 Design Criteria Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0 0 F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp _ 107.0 0 F Case 1 a_3AM 33 3559 (MUR PU)0 I PROJECT NO. 11333-297 1

I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 14 Case Case la_6AM Case 1a_9AM Case la_12PM I Power Level Sediment Jeather Data (MWt) Level (in) Design Criteria 33 3559 (MUR PUI) 0 Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0 0 F Initial UHS Temp equal to TS Limit;(MUR PU) Requires Plant Inlet Temp _ 107.0°F 3 3Initial UHS Temp equal to TS Limit;33 3559 (MURPU) 0 Requires Plant Inlet Temp < 107.0°F Case la_3PM 33 3559 (MUR PU)33 3559 (MUR PU)0 Case la_6PM Case la_9PM Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.01F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp _ 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Case 2a_12AM Case 2a_3AM Case 2a_6AN Case 2a_9AM 33 Case 2a_12PM 33 Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0 0 F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp 5 107.0 0 F Case 2a_3PM Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.01F Case 2a_6PM Case 2a_9PM Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0 0 F Case 3a_12AM Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0*F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Case 3a_3AM Case 3a_6AM Case 3a Initial UHS Temp equal to TS Limit;18 ReursPatIltTm10.F Requires Plant Inlet Temp _ 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F 18 Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F 18 Initial UIHS Temp equal to TS Limit;Requires Plant Inlet Temp:< 107.0°F Case 3a_12PM Case 3a_3PM 33 3559 (MUR PU)I PROJECT NO. 11333-297 I

I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 15 1 Case Weather Data Case 3a_6PM 33 Case 3a_9PM 33 Case 4a_12AM 33 Power Level Sediment (MWt) Level (in.)3559 (MUR PU) 18 3559 (MUR PU) 18 3559 (MUR PU) 12 Design Criteria Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.01F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.O0F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Case 4a_3AM 33 Case 4a_6AM 33 3559 (MUR PU)3559 (MUR PU)12 12 Case 4a_9AM 33 Case 4a_12PM 33 3559 (MUR PU)12 3559 (MUR PU)Case 4a_3PM 33 3559 (MUR PU)Case 4a_6PM 33 3559 (MUR PU)Case 4a_9PM 33 3559 (MUR PU)12 12 12 Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp _ 107.0°F Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F 12 Initial UHS Temp equal to TS Limit;Requires Plant Inlet Temp < 107.0°F 2.2 Acceptance Criteria This calculation assumes an initial UHS temperature and demonstrates that peak temperature acceptance criteria 2.2.1 and 2.2.2 are met. The maximum initial UHS temperature is the maximum allowable lake temperature during normal operation.

2.2.1 Acceptance

Criterion

1. 1 -Peak Temperature

-For the worst Reg. Guide 1.27, Rev. 1 composite 31-day and Rev. 2 composite 36-day weather periods (up to Rev. 6), the maximum allowable plant water intake temperature from the UHS is variously 100°F (Rev. 3), 102'F (Rev. 4), 104'F (Rev. 5 through Rev. 7), or 107'F (Rev. 7, 31-day weather period only).For Rev. 8, the peak temperature of the UHS shall not exceed the maximum allowable UHS temperature of 107 0 F.2.2.2 Acceptance Criterion

1. 2 -UHS Inventory

-There are no specific acceptance criteria for maximum UHS lake drawdown.

However, for the worst 30-day evaporation period, the maximum lake drawdown is detennined for input to calculation L-001355 [Ref. 5.13].I PROJECT NO. 11333-297 -I I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 16 11 2.3 Limitations The results of this calculation are limited by the accuracy of the LAKET-PC program and models inherent in the code (see Ref. 5.14, for a comparison of the predictions of the LAKET program against lake intake temperatures observed in August 1989 at the LaSalle Station).

In addition, see Attachment N for additional validation of LAKET.2.4 Identification of Computer Programs An updated version of LAKET-PC [Ref. 5.1c] was used when performing calculations for Revision 4 (see Attachment G). Unlike its previous version, the weather files are in text fonrat instead of binary. It was therefore necessary to use the Bin to Txt application included in LAKET-PC program number 03.7.292-2.0

[Ref. 5.1 ] to convert previously used binary weather files into text files.After the Rev. 4 issue of this calculation, LAKET-PC [Ref. 5. l d] was updated ffirther to improve flexibility in modeling.

This update did not change the basic modeling algorithms as demonstrated by re-running the Attachment G analyses.

This latest version was used in the Rev. 5, Rev. 6, Rev. 7, and Rev. 8 of this calculation.

With each update that was made, verification calculations with previous calculations were made to ensure the newer, updated version of the software obtained results that matched its predecessor.

For verification purposes, Case 0009 from the main body was recalculated prior to beginning Revision 4 calculations.

Results were within 0.03'F of each other. Several previous cases were recalculated prior to conducting tests for Revision 5 for verification of results for the additional update. Since Revisions 6 through 8 utilize the same version of LAKET as Revision 5, no formal verification was necessary.

SPROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 17]3.0 ASSUMPTIONS

/ ENGINEERING JUDGEMENTS 3.1 Makeup, Blowdown, Runoff, etc. -Consistent with previous calculations

[Ref. 5.4], it is assumed that there is no makeup, blowdown, runoff, or dam spill in the UHS.3.2 Initial Natural Lake Temperature

-Up to Revision 6, the initial natural UHS temperature is assumed to be 4.5'F lower than the initial forced UHS temperature.

Higher initial natural temperatures produce higher peak UHS temperatures, if the peak temperature occurs in the first few days of the UHS transient.

A previous calculation, L-002456 [Ref. 5.6a], analyzed the cooling lake for two units in full power operation (post-power uprate configuration) during the worst day and the worst five days in the weather history (July 15, 1995 and July 12 -17, 1995). It found that the minimum difference between forced and natural lake temperatures during this peak lake temperature period is 4.5°F. The LOCA transient begins with a cooling lake dike failure and both units operating at full power. Although L-002456 [Ref. 5.6b] was revised for MUR PU and found an increase in maximum lake temperature by approximately 0.1°F, the minimum difference between forced and natural lake temperatures during the peak lake period of 4.5°F remains bounding.

Therefore, this assumption remains conservative.

Revision 7 -The initial natural UHS temperature is conservatively assumed to be equal to the initial forced UHS temperature.

Revision 8 -The initial natural temperature is set to the natural temperature of the UHS at the initial time of each case. This is determined from the results of the worst weather determination cases'WorstWeather_1 10.dat' and 'WorstWeather_120.dat' (see Attachment 0).3.3 Sensible Heat Load from RCS -Up to Revision 6, it is conservatively assumed that all of the sensible heat from the reactor and the primary system is dissipated to the UHS within six hours. One-half of the heat is assumed to be rejected in the first 3-hour time step and the other half is rejected in the second 3-hour time step. This is based on the assumption that the temperature within the reactor will be at 100'F within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Peak calculated temperatures are not sensitive to the timing of the introduction of sensible heat within the first two time steps of the analysis.

Note that the minimum time step for LAKET is three hours which is short relative to the transit time of the lake given by the UHS volume divided by the volumetric flow rate of CSCS flows or: transit = V / Q = (341.4 acre-ft)( 43,560 ft 2/acre) / (86.0 cfs)tlrait = 172,923 sec = -48 hours Where the UHS volume is taken from Table 7.3 and Q is taken from Assumption 3.5. Thus the time step (3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />) is small relative to the transit time (48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />).Revision 7 -It is still assumed that all of the sensible heat from the reactor and the primary system is dissipated to the UHS within six hours. However, since LAKET is run using one hour time steps, one-sixth of the heat is assumed to be rejected in each of the first six hours. Also, with the new effective volume factor calculated in Attachment J and lake volume following removal of water for fire-fighting in Attachment I, the transit time of the UHS is changed. The new UHS transit time is: ttransit = Vtotai * (Effective Vol. Factor) / Q = (340.0 acre-ft)*(0.634)*(43,560 ft 2/acre) / (86.0 cfs)PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 18J t,ransi, = 109,184 sec = 30.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> (for 18-in of sedimentation)

The time step (one hour) is small relative to the transit time (30.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />).Revision 8 -The dissipation of sensible heat to the UHS is considered in sections D6.1.1 and D6.2.1 of L-002453 [Ref. 5.8d]. Due to a change in the UHS flow rate the transit time has changed. This calculation is documented in Section 06.3 of Attachment 0.ttr=,sit 123,063 sec = -34.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> (for 18-in of sedimentation) 3.4 UHS Surface and Volume -The effective surface area and volume are assumed to be 90% of the total surface area and volume. This is in accordance with Reference 5.14, which compares the predictions of the LAKET program against lake intake temperatures observed in August 1989 at the LaSalle Station.Revision 7 and 8 -An effective area percentage of 57.9% of the total UHS area and an effective volume percentage of 63.4% of the total UHS volume are determined in Attachment J. This was determined for the 18-in of sedimentation case. The use of maximum silting reduces the UHS volume, and therefore the residence time. This reduces the effectiveness of the UHS and is thus conservative.

3.5 CSCS Flow -The total plant flow during the UHS analysis is assumed to be 38,600 gpm (86.0 cfs). The total flow is based upon the cumulative flow contribution from thirteen CSCS pumps operating at design flow conditions (eight RHR-SW pumps, 4,000 gpm each; three DG pumps, two at 1300 gpin and one at 2,000 gpm; and two HPCS DG pumps, 1000 gpm each) [Ref.'s 5.11, 5.12].Revision 7 -It is noted that the fuel pool emergency makeup flow rate is not included, as this flow does not return to the UHS (See Assumption 13.1).Revision 8 -Due to an RHR pump and two RHR service water pumps being aligned for spent fuel pool cooling services, the total plant flow is 29,300 gpm (65.3 cfs) for the first 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> following the UHS event and is 38,600 gpm (86.0 cfs) following the first 16 hours1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> [Ref. 05.11]. More detail is provided in Design Input 04.6. Additionally, the UHS no longer provides fuel pool emergency makeup flow.3.6 Water Properties

-Up to Revision 6, the density and specific heat of water in the UHS are assumed to be 62.02 lb/ft3 and I Btu/lb-°F, respectively

[Ref. 5.10]. This corresponds to an assumed average temperature of 98.5°F.Revision 7 and 8 -The density and specific heat of water in the UHS are assumed to be 62.00 lb/ft 3 and 0.998 Btu/lb-°F, respectively

[Ref. 5.10]. This corresponds to an assumed average temperature of I 00°F.3.7 UHS Inventory used for Fire Fighting -As stated in minor Revision 5A, the UHS requirement for use of fire water during accident and transient conditions was revised from 132,000 gals to 440,400 gals (See UFSAR Change Package LUCR #96. UFSAR section 9.2.6.3.a was updated by UFSAR Change Package LUCR #96). Assumption 3.7 is adjusted to account for the new UHS requirement for fire fighting in 3.7B.A. Up to Revision 5 -The use of UHS inventory for fire fighting is insignificant.

UFSAR Section 9.2.6.3[Ref. 5.3] states that 132,000 gallons of water from the UHS must be available for fire fighting following an accident.

Fire fighting could consume up to 0.41 acre-ft (132,000 gal x 0.1337 ft 3/gal /43,560 ft 2/acre). The volume and surface area of the UHS at its maximum drawdown of 1.5 ft (El.I PROJECT NO. 11333-297 I1 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 19 688.5 ft) are 341 acre-ft and 81.3 acres, respectively.

Thus, fire water consumption would decrease the UHS heat capacitance by only 0.1% (0.41 acre-ft/341 acre-ft) and increase the maximum UHS drawdown by only 0.005 ft (0.41 acre-ft/81.3 acres).B. Revisions 5 and 6 -The use of UHS inventory for fire fighting is insignificant.

UFSAR Section 9.2.6.3[Ref. 5.3] states that 440,400 gallons of water from the UHS must be available for fire fighting following an accident.

Fire fighting could consume up to 1.352 acre-ft (440,400 gal x 0.1337 ft 3/gal /43,560 ft 2/acre). The volume and surface area of the UHS at its maximum drawdown of 1.5 ft (El.688.5 ft) are 341 acre-ft and 81.3 acres, respectively.

Thus, fire water consumption would decrease the UHS heat capacitance by only 0.396% (1.352 acre-ft/341 acre-ft) and increase the maximum UHS drawdown by only 0.0166 ft (1.352 acre-ft/81.3 acres). This is less than 0.2 inches of drawdown.C. Revision 7 and 8 -The use of UHS inventory for fire fighting is accounted for in the LAKET evaluations.

It is assumned that all UHS inventory for fire fighting (440,400 gallons [Ref. 5.31) is used immediately following an accident (See Assumption 13.2 in Attachment I). This is conservative as it decreases the volume of water in the UHS.3.8 Modeling of Precipitation

-Up to Revision 6, in the UHS analysis for power uprate no credit is taken for precipitation.

The worst UHS temperature and evaporation periods for the updated weather history were selected assuming there is no precipitation.

The UHS maximum temperature and maximum evaporation cases were analyzed assuming there is no precipitation.

Revision 7 and 8 -The worst UHS temperature and evaporation periods for the updated weather history were selected with precipitation included.

Following selection of the worst periods, precipitation is conservatively removed, and analysis of the UHS maximum temperature and maximum evaporation cases were analyzed assuming there is no precipitation.

I PROJECT NO. 11333-297-I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 20 11 I CACLTO O -047RVSO O AEN.2 4.0 DESIGN INPUTS 4.1 UHS Geometry -According to calculation L-001584 [Ref. 5.5], the surface area and volume profile for the UHS with no sediment accumulation can be represented as a series of fifteen, one-foot thick frustums, as follows (volume adjustments account for segments that are not frustums):

Segment No Elevation i Bottom Surface Area Top Surface Area Volume Adjustment M_____ -t) J (ft 3)15 675-676 332 14 676-677 2786 (acres)0.0076 0.064 (ft 3)2786 (acres)0.064 (acre-ft)8091 0.186 1 13 .677-678 I 8091 0.186 14,215 ___ 0.326f 12 678-679 14,215 0.326 224,302 5.15 +2.27+1.66" 11 679-680 224,302 5.15 I 275,605 6.33 10 680-681 275,605 6.33 353,588 8.12 9 681-682 353,588 8.12 423,844 9.73 8 682-683 423,844 9.73 526,454 12.09 7 683-684 526,454 12.09 642,512 14.75 6 684-685 642,512 I 14.75 1,293,664 29.70 -0.84*685-686 1,293,664 29.70 1,293,664--

29.70** +21.67+19.54*

4 686-687 3,368,632 77.33 3,439,517 78.96 3 687-688 3,439,517 78.96 3,508,668 80.55 688-689 3,508,668 80.55 3,578,525 82.15 1 689-690 3,578,525 82.15 3,651,620 83.83* Adjustments to the frustum volumes account for the UHS bottom contour, localized hills and pockets"*Segment 5 is modeled as a cylinder with major adjustments to account for the UHS bottom contour According to Reference 5.5, the UHS volume for zero sediment deposition is 465 acre-ft. The surface area and volume profile data from Reference 5.5 are based on the latest lake survey performed in 1997.According to UFSAR Section 9.2.6 [Ref. 5.3], the UHS volume for zero sediment deposition is 460 acre-ft.The volume from 1997 lake survey data is only 1% greater than the volume cited in the UFSAR. Because of this and because the lake survey provides the best available volume and lake contour data, the lake survey data will be used in the UHS analysis.4.2 Weather Periods 31 Day Synthetic Weather Period (R.G. 1.27, Rev. 1) -The worst combined 31-day historical weather period is based on weather data from July 4, 1948 through June 30, 1996 and is synthetically assembled in a data file (File Name: worstday-9am.txt) and is documented in Attachment H [see Attachument A and Ref.5.4].PROJECT NO. 11333-297 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 21 1 Revision 7 -The worst combined 31-day historical weather periods is based on weather data from July 4, 1948 through June 30, 1996 used in the previous revisions and weather data from January 1, 1995 through September 30, 2010 from LaSalle Station (with unavailable data from Peoria, IL). Selection of the worst weather day and worst weather 30 days and a synthetically assembled data file of these days are documented in Attachment M.Revision 8 -The combined 31-day historical weather period is not used in this revision.36 Day Synthetic Weather Period (R.G. 1.27, Rev. 2) -The worst combined 36-day historical weather period is based on weather data from July 4, 1948 through June 30, 1996 and is synthetically assembled in a data file (File Name: 5-1-30days9am.txt) and is documented in Attachment H [see Attachment A and Ref.5.4].Revision 7 and 8 -The worst combined 36-day historical weather period is not used in this revision.30 Day Weather Period (R.G. 1.27, Rev. 1) -The worst 30-day historical weather period for evaporative losses is based on weather data from the summer of 1954 as contained in a data file (File Name: 30dayevap.txt) and documented in Attachment H.Revision 7 and 8 -The worst 30-day historical weather period for evaporative losses based on weather data from the summer of 1954 was determined to remain limiting when compared to worst 30-day weather period for evaporative losses from the LaSalle Station weather data from January 1, 1995 to September 30, 2010. This is documented in Attachment M.Revision 8 -Weather file creation for this revision is documented in Section 06.4 in Attachment 0.Weather files are created for several time periods including:

1) the worst 33, 39, 42, or 45 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br /> followed by the next consecutive 31 days at various starting times and 2) synthetic weather files of the worst 33 hours3.819444e-4 days <br />0.00917 hours <br />5.456349e-5 weeks <br />1.25565e-5 months <br />, worst 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and worst 30 days at various start times.4.3 Seepage Rate 0.2 cfs 5500 ft 4.4 CSCS Pond Length 4.5 UHS Heat Load[Ref. 5.4][Ref. 5.4][Ref. 5.8][Ref. 5.8][Ref. 5.9]Appendices L9.1 and L9.3 in Attachment L (Rev. 7)Appendix P9.1 in Attachment P (Rev. 8)4.6 Current T.S. Allowable Sediment Accumulation in the UHS 4.7 Maximum Allowable CSCS Intake Temperature 1.5 feet (average)Case Specific 4.8 Other -See Attachment G for additional Revision 4 Design Inputs, Attachment H for additional Revision 5 and 6 Design Inputs, Attachment I for additional Revision 7 Design Inputs, and Attachment 0 for additional Revision 8 Design Inputs.PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 22]

5.0 REFERENCES

5.1 a) LAKET-PC Computer Prog., Version 1.0, S&L Program No. 03.7.292-1.0, October 1997.b) LAKET-PC Plot Prog., Version 1.2, S&L Program No. 03.7.292-1.2, Nov. 1999 c) LAKET-PC Computer Prog., Version 2.0, S&L Program No. 03.7.292-2.0, Aug. 2004 (Rev. 4).d) LAKET-PC Computer Prog., Version 2.2, S&L Program No.03.7.292-2.2, Dec. 2004 (Rev. 5, 6, 7, and 8).5.2 "Ultimate Heat Sink for Nuclear Power Plants," U.S. Atomic Energy Commission, Regulatory Guide 1.27, Rev. 1, March 1974 and Rev. 2, January 1976.5.3 "Ultimate Heat Sink," LSCS-UFSAR, 9.2.6, Rev. 19.5.4 "Sensitivity Study for Ultimate Heat Sink Sizing," Calculation L-001581, Rev. 0, December 23, 1997.5.5 "Volume of the Ultimate Heat Sink (UHS)," Calculation L-001584, Rev. 1, March 25, 1998.5.6 a) "LaSalle County Station Cooling Lake Performance," Calculation L-002456, Rev. 1.b) "LaSalle County Station Cooling Lake Performance," Calculation L-002456, Rev. Ia.5.7 UHSAVG Computer Program, S&L Program No. 03.7.642-1.0, August 1997.5.8 a) "UHS Heat Load," Calculation L-002453, Rev. 1, December 1999.b) "UHS Heat Load," Calculation L-002453, Rev. 2, April 2002.c) "UHS Heat Load," Calculation L-002453, Rev. 3, June 2012.d) "UHS Heat Load," Calculation L-002453, Rev. 4.5.9 LaSalle Technical Specifications, SR 3.7.3.2, Surveillance Requirements, Amendment 206/193.5.10 STMFUNC Computer Program, S&L Program Number STM 03.7.598-2.0, May 2003.5.11 LaSalle CSCS Pump Curves, Crane-Deming, (Attachment D): a) T-5 669, "Pump Performance Curve for 2E 1 2-C300A," Rev. 1.b) T-5670, "Pump Performance Curve for 2EI2-C300B," Rev. 1.c) T-567 1, "Pump Performance Curve for 2E 1 2-C300C," Rev. 1.d) T-5672, "Pump Performance Curve for 2E12-C300D," Rev. 1.e) T-5695, "Pump Performance Curve for IE E 2-C300A," Rev. 1.f) T-5706, "Pump Performance Curve for 1 E12-C300B," Rev. 1.g) T-5707, "Pump Performance Curve for 1E1 2-C300C," Rev. 1.h) 1821-2, "Pump Performance Curve for 1E12-C300D," Rev. 1.i) 1940-2, "Pump Perfornance Curve for ODGOI P," Rev. A.j) 19516, "Pump Perfommance Curve for IDGO1P & 2DGO1P," Rev. 1.PROJECT NO. 11333-297 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 223 11 I CACLTOIO -047RVSO O AEN.2 I 5.12 5.13 5.14 5.15 5.16 5.17 5.18 VPF 3275-048, "Pump Performance Curve," Union Pump Co. HPCS DG Pump 1E22-C002 and HPCS DG Pump 2E22-C002, Rev. 2 (Attachment D).L-001355, "LaSalle County Station CSCS Hydraulic Model," Rev. 005A.S&L's January 5, 1990 Study, "Comparison of Cooling Lake Temperature Predictions from the LAKET Computer Model with Observed Lake Temperatures for the Summer of 1989," in file WIN 0858 (provided as an Attachment to Reference 5.6, "LaSalle County Station Cooling Lake Performance," Calculation L-002456, Rev. 1, December 13, 1999).Marks' Standard Handbook for Mechanical Engineers, 9 1h Edition, Edited by Avallone and Baumeister, McGraw-Hill, 1987 Letter from Mike Peters, Lasalle Station to Manuel Vega, S&L.

Subject:

Requested Input for L-002457 Revision 5. (See pp. H23)Email from Paul Derezotes, S&L to Michael Duffy, S&L, "Uhsavg Program Capabilities Summary for Lasalle." (See pp. H24)GE Letter SC06-01, dated 1/19/2006, "Plants with GE Containment Design or Analysis (Attachment 1)" I PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 24 6.0 NUMERIC ANALYSIS 6.1 Calculation of Plant Temperature Rise, AT The CSCS temperature rise across the plant is computed per the method described in Section 2.1.6. Table G7.1 contains the average temperature rise for each time step for the Rev. 4, 5, and 6 analyses.

The average temperature rise for MUR PU and EPU is calculated in Attachment L for the Rev. 7 analysis.

The plant heat load calculation

[Ref. 5.8d] was revised to incorporate more realistic heat loads. The plant temperature rise based on the revised heat loads are calculated in Attachment P for the Rev. 8 analysis.(Note that the heat load data for the Rev. 3 analyses for each three-hour increment is listed in Table 7.2 and Figure 7.14 of this calculation).

The EXCEL formulas and interpolation macro for the temperature rise up to Rev. 6 are printed in Attachments C and G. The interpolation is verified by inspection.

The tables are produced using EXCEL Version 97SR- 1. Formulas for determining the CSCS temperature rise across the plant in Rev. 7 are shown in Attachment L. Formulas for determining the CSCS temperature rise across the plant in Rev. 8 are shown in Attachment P.6.2 UHS Area and Capacity The area-capacity profile of the UHS is determined for three sediment accumulation levels: 0, 0.5, and 1.5 feet for Rev. 5 and 1 foot for Rev. 6. The existing technical specification limit on minimum UHS volume is an average sediment accumulation of 1.5 feet. The 0.5-foot and 1-foot sediment accumulation cases were selected as an intermediate level of volume degradation that could potentially serve as a new technical specification limit. (As can be seen in the Table 6.1 computation of UHS volume, an average sediment accumulation of 0.5 ft corresponds to a UHS volume of 423.5 acre-ft.)The area-capacity profile of the UHS is computed using the inputs of calculation L-001584 [Ref. 5.5] and the methodology of calculation L-001581 [Ref. 5.4]. The UHS is modeled as a series of one-foot thick horizontal slices, each in the shape of a frustum. The survey data summarized in Design Input 4.1 provides the surface areas of the top, A,, and the bottom, Ab, of each of these segments (of depth, d). The volume of each of these frustums is (A, + Ab + [(A,)(Ab)]A

)(d/3) [Ref. 5.15]. Deviations from the frustum shape within each of the segments are accounted for by the volume adjustments identified in Design Input 4.1.Because a somewhat simpler methodology was used, the results of the area-volume profile calculation are slightly different than those of calculation L-00l1584

[Ref. 5.5].The area-capacity profiles are computed in the Excel spreadsheet shown in Table 6.1 and Appendix C (EXCEL Version 97SR-1). Sediment is assumed to deposit in a layer of uniform vertical thickness along the bottom and sloped sides of the UHS. A one-foot sediment accumulation results in a one-foot translation upward of the UHS geometry, which is modeled as a reassignment of the dimensions of each segment to the next highest neighboring segment. Fractional-foot sediment accumulation is modeled as the fractional reassignment of the dimensions of each segment to higher segments.

Each one-foot thick segment is then composed of fractional-foot thicknesses of two neighboring frustums.For the 0, 0.5, 1, and 1.5-foot sediment cases, area and capacity were computed at elevation 690 ft and at one-foot intervals down to elevation 685 ft. The areas, incremental volume and total volume for these elevations are shown in bold type in Table 6.1. The LAKET-PC runs use the area and volume for only these first six elevations.

For the 0, 0.5, 1, and 1.5-foot cases below elevation 685 ft, area and volume are PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 25)]computed only at intermediate elevations such as 683.5 and 684.5 ft.Data from the Table 6.1 spreadsheet that is used as LAKET-PC input is listed in Table 7.1.For Revision 7, the UHS volume and area input to LAKET are revised to incorporate the effects of removing water for fire-fighting.

See Attachumnent I for further documentation of the changes to UHS volume and area. In addition, the effective area and effective volume of the UHS are changed as a result of the analysis in Attachment J. See Attachment I for further documentation of the changes to UHS volume and area.Revision 8 uses the same UHS volume and area input as developed in Revision 7.6.3 Maximum Allowable Lake Temperature 6.3.1 UHS Temperature Limit of 100'F -Rev. 3 Analysis The UHS analysis is performed using the LAKET-PC computer program. For postulated safe shutdown and design basis accident events, the peak UHS temperature must be kept within the CSCS intake temperature limit of 100°F. The analysis determines the maximum lake intake temperature that can be allowed during normal operation, consistent with the 1007F temperature limit. Three sediment depths are modeled for the worst 36-day composite temperature period. A no sediment case, a 0.5-foot sediment case, and a 1.5-foot sediment case are run for the updated weather data conditions.

The 0.5-foot sediment case corresponds to a potentially new technical specification limit of 423.5 acre-ft on UHS volume. The 1.5-foot case corresponds to the current technical specification limit on average UHS sediment deposition.

In assuming the initial UHS temperature is equal to the maximum allowable temperature of the cooling water supply to the plant from the lake, one is assuming conditions more severe than occur in the weather history. Because of this, the peak temperature occurs in the first day of these UHS transients and the time of day at which the transient is assumed to begin becomes critical.

To account for the time of day at which the UHS transient may start, eight start times (00:00, 03:00, 06:00, 09:00, 12:00, 15:00, 18:00 and 21:00)are used for each of the three sediment depths being analyzed.Limiting initial UHS temperatures are found for the 24 combinations of start time and sediment depth for: 1. the first day of the UHS transient is worst day in the weather history (July 15, 1995), and 2. the first day in the UHS transient is the first of the worst five days in the weather history (July 12 -17, 1995).The limiting initial UHS temperatures found by these two tests are listed in Table 7.3, plotted in Figure 7.1 and documented in Attachment B. Table 7.3 indicates which of the two tests, the one-day or the five-day test, produced the most restrictive temperature limit for each case. Three of the post-LOCA temperature transients are shown in Figures 7.2, 7.6, and 7.10. The corresponding post-LOCA drawdowns are shown in Figures 7.3, 7.7 and 7.11. (The LAKET-PC data used to generate these plots is provided in Attachment F.)The three cases selected for these plots are the sediment depths of 0, 0.5 and 1.5 ft, the start time of 09:00, and the worst 36-day composite weather history (consistent with R.G. 1.27, Rev. 2). The limiting initial UHS temperatures are consistent with a peak CSCS intake temperature of 1007F.In addition to determining the post-LOCA temperature response of the UHS to the worst 36-day temperature period, the maximum UHS drawdown was determined for the worst 30-day evaporation period (in accordance with R.G. 1.97, Rev. 2). A 0-foot , a 0.5-foot and a 1.5-foot sediment case are run with the PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 263 updated weather data. The 0.5-foot sediment case corresponds to a potentially new technical specification limit on UHS volume of 423.5 acre-ft and the 1.5-foot sediment case is the existing technical specification limit. UHSAVG selected the time of day at which the drawdown transient begins. LAKET-PC output for the 30-day evaporation cases is documented in Attachment B. The post-LOCA temperature transients are shown in Figures 7.4, 7.8 and 7.12 and the post-LOCA drawdowns are shown in Figures 7.5, 7.9 and 7.13.(The LAKET-PC data used to generate these plots is provided in Attachment F.) Initial UHS temperatures were selected to produce a peak CSCS intake temperature of 1007F.6.3.2 UHS Temperature Limit of 102'F -Rev. 4 Analysis For this analysis, the limiting plant intake temperature is increased to 102'F. Limiting weather data is unchanged from the Rev. 3 analysis.

Further, the limiting start time for the transient is based on the parametric analysis per Rev. 3. Thus 09:00 hrs (9 AM) is taken as the most limiting start time. The limiting initial UHS temperature obtained for this start time can be conservatively applied as a maximum operating lake temperature for any time during the day. Analysis and results are documented in Attachment G.6.3.3 UHS Temperature Limit of 104'F -Rev. 5 and 6 Analyses For this analysis, the limiting plant intake temperature is increased to 104'F. Limiting weather data is unchanged from the Rev. 3 analysis.

Further, the limiting start time for the transient is based on the parametric analysis per Rev. 3. Thus 09:00 hrs (9 AM) is taken as the most limiting start time. The limiting initial UHS temperature obtained for this start time can be conservatively applied as a maximum operating lake temperature for any time during the day. Rev. 6 utilizes the same methodology as Rev. 5 for additional cases to analyze the maximum initial UHS temperatures for 1 ft of sediment.

Analysis and results are documented in Attachment H.6.3.4 UHS Temperature Limit of 104'F and 107'F for EPU and MUR PU -Rev. 7 Analysis For this analysis, the limiting intake temperature is 1047F and 1077F. The limiting weather data is updated from the previous revisions, as documented in Attachment M. The limiting time of day at which the UHS starts is determined by running Case 3a (107'F intake temperature, 18-in sediment level, EPU power level)at eight different start times (00:00, 03:00, 06:00, 09:00, 12:00, 15:00, 18:00 and 21:00) and determined to be 6:00AM. The limiting initial UHS temperature obtained for this start time can be conservatively applied as a maximum operating lake temperature for any time during the day. Analysis and results are documented in Attachment I.6.3.5 UHS Temperature Limit of 107'F for MUR PU -Rev. 8 Analysis For this analysis, the limiting intake temperature is 107'F. The limiting weather data is updated from the previous revisions, as documented in Section 06.4 of Attachment 0 in order to conform to Rev. 2 of R.G.1.27 [Ref. 5.2]. Cases are run for eight different start times (00:00, 03:00, 06:00, 09:00, 12:00, 15:00, 18:00 and 21:00) at four different sedimentation levels (0 in, 6 in, 12 in, and 18 in). Analysis and results are documented in Attachment 0.6.4 30-Day Evaporation Up to Revision 6 -The limiting initial temperature for the various amounts of siltation (see Section 7.1.3) is used as the starting point for the 30-day evaporation case to demonstrate negligible impact on previous results. Results documented in Attachment H demonstrate that the UHS evaporative losses are less than I PROJECT NO. 11333-297 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 2?7 11 I CACLTOIO -047RVSO O AEN.2 1.5-ft for the worst 30-day evaporative period.Revision 7 -The limiting initial temperature for the various amounts of siltation (see Section 7.1.3) is used as the starting point for the 30-day evaporation case to determine the maximum amount of UHS drawdown.For the 107'F limiting intake temperature and EPU power level, the limiting sediment level is determined to be 0-in. For other cases (i.e. 104'F or MUR PU) only the limiting sediment level case (0-in) is run. Results are documented in Attachment I.Revision 8 -Worst 30-day net evaporation cases are run for the four levels of sedimentation.

Results are documented in Attachment 0.I PROJECT NO. 11333-297]

I I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 28 m 7.0 RESULTS AND CONCLUSIONS

7.1 Summary

7.1.1 Historical

Results -Rev. 3 and Earlier The inclusion of weather conditions from 1982 to 1996 significantly increases the severity of the UHS design basis temperature transient.

The worst 36-day composite weather period was developed from July 1948 through June 1996 weather history for the area. The UHSAVG program determined the worst 36-day (worst 5-day + worst 1-day + worst 30 consecutive day) period to be: 09:00, July 12, 1995 through 06:00, July 17, 1995; 12:00, July 15, 1995 through 09:00, July 16, 1995; and 15:00, July 10, 1983 through 12:00, August 9, 1983 (see Appendix A for details).In analyzing the effect of beginning the UHS temperature transient at the maximum allowable cooling lake temperature, one is assuming conditions more severe than those that have occurred in the weather history.Because of this the peak UHS temperature occurs in the first day of the LOCA transient.

The results of the LAKET-PC analysis for the each of the UHS transient start times are summarized in Table 7.3 and Fig. 7.1.The maximum design intake temperature for the CSCS system is 100°F [Rev. 3 analysis].

To meet this requirement, the daily high temperature of the cooling water supply to the plant from the lake would have to be limited to 97.5°F. This limit is consistent with the 96.5 0 F limit at 9:00 am for 1.5-foot silt depth (341.4 acre-ft volume) in the UHS (see Sec. 7.5 for justification).

According to Calculation L-002456, Rev. 1[Ref. 5.6], the 09:00 temperature of the cooling water supply to the plant from the lake on the worst day of the weather history is 95.4°F. As can be seen in Figure 7.1, the l.i1F margin between the historically hottest day and the initial UHS temperature limit is the smallest margin that exists for any starting time of the UHS design temperature transient.

This margin provides an assurance that there is little risk that the most restrictive temperature limits on cooling lake temperature will be exceeded in the future. If the minimum allowable UHS volume were changed to 423.5 acre-ft (0.5 ft average sediment depth), temperature of the cooling water supply to the plant from the lake would have to be limited to 97.5 0 F at 9:00.The maximum drawdown for power uprate under the maximum evaporation conditions is approximately 1.5 feet (El. 688.5 feet). The UHSAVG program determined the worst 30-day evaporation period to be 12:00, June 18, 1954 through 09:00, July 18, 1954. The worst 30-day evaporation period shifted 3% days from the period identified in the UFSAR Sec. 9.2.6.3.1 prior to power uprate. This shift was caused by four minor changes in the modeling of the worst evaporating period that were made when UHSAVG was converted from a mainframe to a PC-based program: 1. The solar radiation model was improved.2. The method for synthesizing missing weather data was improved.3. The UHS surface area and volume were updated to reflect lake survey data.4. The average daily heat load was updated for power uprate.I IPROJECT NO. 11333-297 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 29 11 I CACLTOIO -047RVSO O AEN.2 I 7.1.2 UHS Temperature Limit of 102'F -Rev. 4 Analyses Maximum Initial UHS Temperatures

-Revision 4 (see Attachment G)Start Weather Sediment Limiting Initial UHS Case Time Data Level (in.) Methodology Temperature 1 09:00 1/30 0 Reg. Guide 1.27, Rev. 1 >100oF 2 09:00 5/1/30 6 Reg. Guide 1.27. Rev. 2 >100 0 F 3 09:00 1/30 18 Reg. Guide 1.27, Rev. 1 99.35°F 4 06:00 1/30 18 Reg. Guide 1.27, Rev. 1 >100°F 7.1.3 UHS Temperature Limit of 104 0 F -Rev. 5 and Rev. 6 Analyses Maximum Initial UHS Temperatures

-Revision 5 (see Attachment H)Start Time la 09:00 2a 09:00 3a 09:00 lb 09:00 2b 09:00 3b 09:00 Weather Data 1/30 1/30 1/30 5/1/30 5/1/30 5/1/30 Sediment Level (in.)0 6 18 0 6 18 Methodology Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Limiting Initial UHS Temperature 103.0 0 F 102.9 0 F 102.3 0 F 103.6 0 F 103.5 0 F 102.9 0 F Maximum Initial UHS Temperatures

-Revision 6 (see Attachment H)Start Weather Sediment Limiting Initial UHS Case Time Data Level (in.) Methodology Temperature 4a 09:00 1/30 12 Reg. Guide 1.27, Rev. 1 102.7 4b 09:00 5/1/30 12 Reg. Guide 1.27. Rev. 2 103.0 The values above are rounded to the nearest 0.1 °F and do not include margin.7.1.4 UHS Temperature Limit of 1047F and 107'F at MUR PU and EPU -Rev. 7 Analyses The inclusion of weather conditions from January 1995 to September 2010 from LaSalle Station (with unavailable weather parameters from LaSalle Station taken from Peoria, IL, see Attachment K) further increases the severity of the UHS design basis temperature transient.

The limiting initial UHS temperatures at the sediment levels analyzed for a plant intake limit of 104'F or 107'F at MUR PU and EPU power levels are shown in the table below (See Attachment I for further documentation).

I PROJECT NO. 11333-297 -I I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 30 11 I CACLTOIO -047RVSO O AEN.3 I MUR PU Maximum Initial UHS Temperatures

-Revision 7 (see Attachment I)Case laMUR 2aMUR 3aMUR 4aMUR la_MUR_104F 2aMUR_104F 3aMUR_104F 4aMUR_104F Start Time 06:00 06:00 06:00 06:00 06:00 06:00 06:00 06:00 Weather Data 1/30 1/30 1/30 1/30 1/30 1/30 1/30 1/30 Sediment Level (in.)0 6 18 12 0 6 18 Methodology Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Limiting Initial UHS Temperature 103.63 103.32 102.46 102.93 100.30 99.95 91.68 89.54 12 Reg. Guide 1.27, Rev. 1 EPU Maximum Initial UHS Temperatures

-Revision 7 (see Attachment I).Case la 2a 3a_12am 3a_.3am 3a_6am 3a_9am 3a_12pm 3a_3pm 3a_6pm 3a_9pm 4a 1a_104F 2a_104F 3a_104F 4a_104F Start Time 06:00 06:00 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 06:00 06:00 06:00 06:00 06:00 Weather Data 1/30 1/30 1/30 1/30 1/30 1/30 1/30 1/30 1/30 1/30 1/30 1/30 1/30 1/30 1/30 Sediment Level (in.)0 6 18 18 18 18 18 18 18 18 12 0 6 18 12 Methodology Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Reg. Guide 1.27, Rev. 1 Limiting Initial UHS Temperature 103.63 103.32 104.95 103.14 102.42 103.61 105.80 106.97 107.00 107.00 102.93 100.30 96.80 87.01 85.47 7.1.5 UHS Temperature Limit of 107'F -Rev. 8 Analyses Revision 8 incorporates the weather conditions from January 1995 to September 2010 from LaSalle Station and analyses the UHS design basis temperature transient based on a more realistic MUR PU (3559 MW,)heat load rejected to the UHS and weather selection based on R.G. 1.27, Rev. 2 [Ref. 5.2]. The LAKET-PC[Ref. 5.1] cases are run using the TS limiting temperatures as the initial temperature, and the results are compared to the UHS temperature limit of 107°F. The results of this analysis are shown below (See Attachment 0 for further documentation).

I- PROJECT NO. 11333-297 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 31 11 UHS Temperatures at Maximum Allowable Initial Temperature

-Revision 8 (see Attachment 0)Case Start Weather Sediment Time Data Level (in.)Methodology Case la_12am Case la_3am Case la_6am Case la_9am Case la_12pm Case la_3pm Case 1 a_6pm Case la_9pm Case 2a_12am Case 2a_3am Case 2a_6am Case 2a_9am Case 2a_12pm Case 2a_3pm Case 2a_6pm Case 2a_9pm Case 3a_12am Case 3a_3am Case 3a_6am Case 3a_9am Case 3a1 2pm Case 3a_3pm Case 3a_6pm Case 3a_9pm Case 4a_12am Case 4a_3am Case 4a_6am Case 4a_9am Case 4a_12pm Case 4a_3pm Case 4a_6pm Case 4a_9pm 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 33 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Reg. Guide 1.27. Rev. 2 Initial UHS Temperature

(°F)104.53 102.72 102.00 103.19 104.75 104.75 104.75 104.75 104.53 102.72 102.00 103.19 104.75 104.75 104.75 104.75 104.53 102.72 102.00 103.19 104.75 104.75 104.75 104.75 104.53 102.72 102.00 103.19 104.75 104.75 104.75 104.75 Maximum UHS Temperature (OF)104.53 102.72 103.12 104.33 104.97 104.75 104.75 104.75 105.21 104.54 103.21 104.42 104.99 104.75 104.75 104.75 104.53 105.75 106.15 105.31 105.05 104.75 104.75 104.75 105.86 105.97 105.33 104.54 105.01 104.75 104.75 104.75 I PROJECT NO. 11333-297 I

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 32 7.1.6 UHS Drawdown for Temperature Limit of 104 0 F -Rev. 5 and 6 Analyses Computed drawdown for the UHS is <1.5-ft for the limiting case analysis.7.1.7 UHS Drawdown for Temperature Limit of 104'F/ 07'F at MUR PU and EPU -Rev. 7 Analysis The computed drawdown for the UHS for a temperature limit of 104'F or 107'F at MUR PU and EPU power levels are shown below (See Attachment I for further documentation).

MUR PU Maximum Lake Drawdown -Revision 7 (see Attachment 1)Sediment Maximum Lake Drawdown Case Weather Data Level (in.) (ft)1 lcMUR Worst Net Evap. 0 2.24 1c_MUR_104F Worst Net Evap. 0 2.22 1) Determined from initial lake elevation of 689.98-ft.

EPU Maximum Lake Drawdown -Revision 7 (see Attachment I)Sediment Maximum Lake Drawdown Case Weather Data Level (in.) (ft)1 1c Worst Net Evap. 0 2.27 2c Worst Net Evap. 6 2.25 3c Worst Net Evap. 18 2.20 4c Worst Net Evap. 12 2.23 Ic_104F Worst Net Evap. 0 2.26 1) Determined from initial lake elevation of 689.98-ft.

7.1.8 UHS Drawdown for Temperature Limit of 107'F -Rev. 8 Analysis The computed drawdown for the UHS for a temperature limit of 107'F for the new heat loads developed in L-002453 [Ref. 5.2d] are shown below (See Attachment 0 for further documentation).

Maximum Lake Drawdown -Revision 8 (see Attachment 0)Sediment Maximum Lake Drawdown Case Weather Data Level (in.) (ft)1 1c Worst Net Evap. 0 1.42 2c Worst Net Evap. 6 1.42 3c Worst Net Evap. 18 1.42 4c Worst Net Evap. 0 1.42 Worst Net Evap., NetEvap_0.1 Wind Power Law 18 1.47 Exponent = 0.1 Worst Net Evap., NetEvap_0.2 Wind Power Law 18 1.45 Exponent = 0.2 1) Determined from initial lake elevation of 689.98-ft.

IPROJECT NO. 11333-297 -I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 33J 7.2 Compliance with Acceptance Criteria 7.2.1 Acceptance Criterion

1. 1 -Peak Temperature

-Acceptance Criterion

1. 1 is met provided the plant is operated and monitored and maintain UHS temperatures below the applicable limits per the results listed in Section 7.1.2 (Rev. 4), Section 7.1.3 (Rev. 5 and 6), or Section 7.1.4 (Rev. 7).For Rev. 8, Acceptance Criterion

1. 1 is met as the UHS temperature remains below 107'F for all worst weather cases as shown in Section 7.1.5.7.2.2 Acceptance Criterion

1. 2 -UHS Inventory

-The maximum expected lake drawdown, with no loss of inventory due to spent fuel pool makeup, is given in Section 7.1.8. This will be used in calculation L-001355 [Ref. 5.13].7.2.3 Other The following table lists the cases that were run with the updated software prior to performing calculations for Revision 5. This was done to verify the results that were obtained in the original calculations were obtained again with the updated software.

LAKET output for the verification cases is provided in Attachment H.Verification Original Calculation Results with Most Case Revision Results Current Software (Plant Inlet Temp, *F) (Plant Inlet Temp, TF)CGOe Revision 3 99.95 99.95 C06e Revision 3 99.97 99.96 C18e Revision 3 99.97 99.96 C0609 Revision 4 99.94 99.98 Note: Revisions 6 through 8 utilized the same version of LAKET [Ref. 5. l d] as Revision 5.7.3 Tables* Table 6.1: Determination of UHS Area-Capacity Profiles* Table 7.1: UHS Area-Capacity Inputs for LAKET-PC* Table 7.2: Plant Temperature Rise* Table 7.3: Maximum Allowable Initial Lake Temperatures

• Table G7. 1: Plant Temperature Rise* Table Q7.2: Cumulative Summary for Case 1 -0" Sediment, 09:00 start time* Table G7.3: Cumulative Sumrmary for Case 2 -6" Sediment, 09:00 start time 4 Table G7.4: Cumulative Summary for Case 3 -18" Sediment, 09:00 start time* Table G7.5: Cumulative Summary for Case 4 -18" Sediment, 06:00 start time* Table H7.0: Overall Sumnrnary of Cases and Results* Table H7.1: Cumulative Summary for Case la -0" Sediment, 09:00 Start, 1/30 Weather Data 4 Table H7.2: Cumulative Summary for Case lb -0" Sediment, 09:00 Start, 5/1/30 Weather Data 4 Table H7.3: Cumulative Summary for Case lc -0" Sediment, 12:00 Start, Worst 30-day Evap. Data# Table H7.4: Cumulative Sulmnary for Case 2a -6" Sediment, 09:00 Start, 1/30 Weather Data PROJECT NO. 11333-297 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 334 11 I Table H7.5: Cumulative Summary for Case 2b -6" Sediment, 09:00 Start, 5/C/30 Weather Data 0 Table H7.6: Cumulative Summary for Case 2c -6" Sediment, 12:00 Start, Worst 30-day Evap. Data* Table H7.7: Cumulative Summary for Case 3a -18" Sediment, 09:00 Start, 1/30 Weather Data* Table H7.8: Cumulative Summary for Case 3b -18" Sediment, 09:00 Start, 5/1/30 Weather Data* Table H7.9: Cumulative Summary for Case 3c -18" Sediment, 12:00 Start, Worst 30-day Evap. Data* Table H7.10: Cumulative Summary for Case 4a -12" Sediment, 09:00 Start, 1/30 Weather Data# Table H7.11: Cumulative Summary for Case 4b -12" Sediment, 09:00 Start, 5/1/30 Weather Data* Table H7.12: Cumulative Summary for Case 4c -12" Sediment, 12:00 Start, Worst 30-day Evap.Data* Table H7.13: Table of Outlet Files Revision 7 4 Table 12.1: Initial Lake Level* Table 12.2: List of LAKET Cases* Table 16.1: LAKET Files* Table 17.1a: MUR PU (3559 MW,) Overall Summary for Maximum Temperature

• Table 17.1b: EPU (4067 MW,) Overall Summary for Maximum Temperature

• Table I7.2a: MUR PU Overall Summary for Maximum Evaporation

• Table 17.2b: EPU Overall Summary for Maximum Evaporation Revision 8 4 Table N6-4: Calculation of Upper Layer Depth* Table 02-1: Initial Lake Level+ Table 02-2: List of LAKET Cases* Table 04-I1: Proposed TS Limits* Table 06-1: UHS Transit Time Calculation

• Table 06-2: Worst Weather Periods -11 0°F Initial Temperature

• Table 06-3: Worst Weather Periods -120'F Initial Temperature

• Table 06-4: Worst Weather -9 Hour and 12 Hour Period* Table 06-5: Worst Weather Files* Table 06-6: Worst Weather Comparison

• Table 06-7: 33-24-30 Case Weather Files* Table 06-8: 33-24-30 Case Comparison

• Table 06-9: Worst Temperature Cases* Table 06-10: Worst Net Evaporation Cases* Table 06-11: Wind Sensitivity Runs* Table 06-12: UHS Drawdown Curves for Mixing Zone Sensitivity Runs* Table 06-13: UHS Mixing Sensitivity Runs 7.4 Figures Figure 7. 1: Figure 7.2: Figure 7.3: Figure 7.4: Figure 7.5: Figure 7.6: Figure 7.7: Limiting Lake Temperatures vs. Time of Day Case 0009: UHS LOCA Temperature Transient, Updated Worst 36-Day Temperature Period Case 0009: UHS LOCA Drawdown, First 30 Days of Updated Worst 36-Day Temp. Period Case 00e: UHS LOCA Temperature Transient, Updated Worst 30-Day Evaporation Period Case 00e: UHS LOCA Drawdown, Updated Worst 30-Day Evaporation Period Case 0609: UHS LOCA Temperature Transient, Updated Worst 36-Day Temperature Period Case 0609: UHS LOCA Drawdown, First 30 Days of Updated Worst 36-Day Temp. Period PROJECT NO. 11333-297 -I I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 35 11 I C.8 06e: RVI NO. 8 PAGE NO. 35* Figure 7.8: Case 06e: UHS LOCA Temperature Transient, Updated Worst 30-Day Evaporation Period* Fiuure 7.9: Case06e: UHS LOCA Drawdown Updated Worst 30 Day Evaporation Period* Figure 7.10: Case 1809: UHS LOCA Temperature Transient, Updated Worst 36-Day Temperature Period* Figure 7.11: Case 1809: UHS LOCA Drawdown, First 30 Days of Updated Worst 36-Day Temp. Period* Figure 7.12: Case 18e: UHS LOCA Temperature Transient, Updated Worst 30-Day Evaporation Period* Figure 7.13: Case 18e: UHS LOCA Drawdown, Updated Worst 30-Day Evaporation Period* Figure 7.14: UHS Heat Load Following LOCA* Figure G7. 1: UHS Outlet Temperature vs. Days After SCRAM* Figure G7.2: UHS Inlet Temperature vs. Days After SCRAM* Figure G7.3: Limiting Lake Temperatures vs. Time of Day -Recreation of Figure 7.1 from main body of calculation

• Figure H7. 1: 1/30 Plant Inlet Temperature vs. Day* Figure H7.2: 1/30 Plant Outlet Temperature vs. Day* Figure H7.3: 5/1/30 Plant Inlet Temperature vs. Day* Figure H7.4 5/1/30 Plant Outlet Temperature vs. Day+ Figure H7.5: Case 3a: UHS LOCA Temperature Transient, Worst 3 1-Day Temperature Period 4 Figure H7.6: Case 3b: UHS LOCA Temperature Transient, Worst 36-Day Temperature Period* Figure H7.7: Case 3c: UHS LOCA Drawdown, Worst 30-Day Evaporation Weather Period Revision 7* Figure 17.1: Plant Outlet Temperature (MUR PU)* Figure 17.2: Plant Outlet Temperature (EPU)* Figure 17.3: Plant Inlet Temperature (MUR PU)* Figure 17.4: Plant Outlet Temperature (EPU)4 Figure 17.5: Case 3aMUR: UHS LOCA Temperature Transient, Worst 3 1-Day Temperature Period+ Figure 17.6: Case 4aMUR: UHS LOCA Temperature Transient, Worst 31-Day Temperature Period 4 Figure 17.7: Case 3a: UHS LOCA Temperature Transient, Worst 31 -Day Temperature Period 6 Figure 17.8: Case 4a: UHS LOCA Temperature Transient, Worst 31-Day Temperature Period* Figure 17.9: Case I cMUR: UHS LOCA Drawdown, Worst 30-Day Evaporation Weather Period 4 Figure 17.10: Case 1 c: UHS LOCA Drawdown, Worst 30-Day Evaporation Weather Period Revision 8* Figure 02.1: Existing UHS Model* Figure 02.2: Modified UHS Model for Mixing Effects* Figure 02.3: MIT Report 161 [Ref. 05.7] Two Stage Pond* Figure 07.1: Case 3a_6AM: UHS LOCA Temperature Transient, Worst 33-Day Temperature Period 0 Figure 07.2: Case 1 c: UHS LOCA Drawdown, Worst 30 Day Evaporation Weather Period 0 Figure 08.2-1: Five Day Temperature Profile for the 10% Mixing Case* Figure 08.2-2: Five Day Temperature Profile for the 20% Mixing Case* Figure 08.2-3: Plant Inlet Temperature for 6AM Cases* Figure 08.2-4: Case Mixing -10% -9AM Results* Figure 08.2-5: Case Mixing -20% -12PM Results 7.5 Recommendations None.I PROJECT NO. 11333-297 I

CALCULATION NO. L-002457 REVISION NO. 8 Table 6.1: Determination of UHS Area- Capacity Profiles (I of 2)PAGE NO. 36 I I I i ] -II with No Sediment with 0.5 feet of Sediment Surface Incremental Total Surface Incremental Total Elevation Slice Area Volume Volume Elevation Slice Area Volume Volume (feet) Number (acres) (acre-feet) (acre-feet) (feet) Number (acres) (acre-feet) (acre-feet) 0.5000 0.5000 675 0.0076 675.500 0.0076 .15 0.03 15 0.03 676 0.0640 0.03 676.500 0.0640 0.03 14 0.12 1 1 14 0.12_677 0.1857 0.15 677.500 0.1857 _ 0.15 13 0.25 13 , 0.25 678 0.3263 0.40 678.500 0.326 0.40_12 0.33 12 0.33 12 (Ad4) 3.4397 2.27 "- 12 (Ad)) 3.44 2.27 12 (Adj) 1.686 12 (AdJ) 1.66 679 5.1493 4.66 679.500 5.15 4.66 11 5.73 11 5.73 680 6.3270 10.39 680.500 6.33 10.39 10 7.20 10 7.20 681 8.1173 " 17.59 681.500 8.12 17.59 9' ______ 8.91 _____ 9 ____ _ 8.91 682 9.7301 26.50 682.500 9.73 26.50 08 10.89 8 10.89 683 12.0857 37.39 683.500 12.09 37.39 7 -" 13.40 1 1 7 13.40 684 14.7500 50.79 1 684.500 14.75 50.79 6 21.79 6 21.79 6 (Adj) -0.84 6 (Adl) -0.84 685 29.6984 71.74 (0.5H6) 9.18 5 29.70 685.000 22.22 59.97 5 (Adg) 32.337Q 21.67 686 27.78 5 (Adj) 19.54 " 685.500 29.70 71.74 686 77.3331 142.64 5 29.70 4 78.15 5 (Adj) 32.34 21.67 687 78.9604 220.79 5 (Adj) 19.54 3 79.75 686.000 29.70 102.18 688 80.5479 300.54 & 45 53.72 2 81.35 686.500 77.33 142.64 689 82.1518 381.89 4 78.15 1 82.99 687.000 78.15 181.44 690 83.8297 "" 464.88 _ 3&4 78.96" 687.500 78.96 220.79 3 79.75 688.000 79.75 260.79 2_&3 80.55 688.500 80.55 300.54 2 81.35 689.000 81.35 82.16 341.34__________1&2 82.16 689.500 82.15 381.89_________

___ 1 82.99 ____690.000 __82._9 82.99 423.50 690.500 83.83 _ _t 464.88 PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 37 Table 6.1: Determination of IJHS Area- Capacity Profiles (2 of 2)wIth 1 feet of Sediment with 1.5 feet of Sediment Surface Incremental Total .I Surface Incremental Total Elevation Slice Area Volume Volume Elevation Slice Area Volume Volume (feet) Number (acres) (acre-feet) (acre-feet) (feet) Number (acres) (acre-ft)eet

.... 0.5000 0.5000 676 ...... 0.0076 0 676.500 0.0076 0. .03 -15 0.03 _____15 ____ 0.03 677 0.0640 0.03 677,500 0.0640 0.03 14 1 0.12 14 0.12 678 0.1857 0.15 678.500 0.1857 ' 0.15 13 0.25 13 0.25 _679 0.3263 0.40 679.500 0.3263 0.40 12 0.33 ' 12 0.33 12 (Ad]) 3.4397 2.27 12 (AdD) 3.4397 2.27-12 (Adj) 1.66 12 (Adj) 1.66 68o 5.1493 4.66 680.500 11 5.1493 4.6e 11 5.73_ ____ 11 5.73 _____681 6.3270 10.39 681.500 6.3270 10.39 10 7.20 10 "'7.20 682 8.1173 17.60 682.500 "' 8.1173 17.59 9 8.91 9 8.91 683 9.7301 26.51 683.500 9.7301 26.50 S10.89 8 10.89 684 7 12.0857 13.40 37.39 684.500 12.0857 13. .40 37.39 7 13.40 ___ 7 ____ 13.40 685 14.7500 50.79 (0.5)(7) .6.37 a 6 21.79 6885.000 13.42 43.76 6 (Adj) _ -0.84 67 18.22 686 29.6984 71.74 685.500 14.7500 o50.79 5 29.70 6 21.79 5 (Ad)) 32.3376 21.67 6 (Adj) -0.84 5 (Adj) 77.3331 19.54 14___2._5 686.000 "s 22.22 59.08 687 77.3331 ____ 142.65 58,8 27.768 ____-78.15 686.500 1 29.6984 71.74 688 78.9604 220.79 5 29.70 3 79.76 5 (Adj) 32.34 21.67 689 80.5479 300.55 5 (Adj) 19.54 2 81.35 687.000 29.70 102.19 690 62.1516 381.89 4&5 53.72 687.500 77.3331 142.64 4 78.15 68.000 78.15 181.86" ________ ____ ____ 384 78'.96 688.500 3&4 78.9604 78.96 220.79 3 _79.76 689.000 79.78 260.8f 2&3 80.88 689.500 80.5479 300.54___ ____2 81.35"1 690.000 2 81.35 341.36 6 82.1616 381.89 PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 38 Table 7.1 -UHS Area-Capacity Inputs for LAKET-PC[ I I -----__ _ I With No Sediment With 0.5 feet of Sediment With 1.0 feet of Sediment With 1.5 feet of Sediment Elevation

--Surface Area Volume -Surface Area -Volume Surface Area Volume Surface Area- Volumeacres _ (acre-feet) (acres) (acre-feet)

__(acres)

_

685 29.70 71.7 22.22 60.0 14.75 50.8 13.42 43.8 686 77.33 142.6 i 29.70 102. 29.70 71.7 2222 6.0 687 78.96 220.8 -78.15 181.8 77.33 142.6 29.70 Jr 102.2 688 80.55 300.5 t 7.5 260.8 78.96 220.8 78.15 I 181.9 689 82.15 381.9 f 81.35 341.4 80.55 300.5 79.75 260.8 690 83.83 464.9 Ki 82.99 423.5 82.15 381.9 81.35 1 341.4 PROJECT NO. 11333-297 Non-proprietary version REVISION NO. 8 CALCULATION NO. L-002457 PAGE NO. 39 Table 7.2 -Plant Temperature Rise (1 of 6)CSCS Flowrate 86 cfs Mass Flow 1 9,201,392 1 bm/hýDe~nsl 62.02 9I2 1 IbmiF Starting Time (hr)Ending Time (hr)Plant Temperature Rise (Den F)0 3 35.26 3 6 28.79 6 9 16.68 9 12 16.28 12 15 15.32 15 18 14.97 18 21 14.53 21 24 14.29 24 27 13.88 27 30 13.45 30 33 13.30 33 36 13.30 36 39 13.30 39 42 13.24 42 45 12.73 45 48 12.73 48 51 12.57 51 54 12.43 54 57 12.24 57 60 12.02 60 63 12.02 63 66 12.02 66 69 12.02 69 72 12.01 72 75 11.49 75 78 11.49 78 81 11.49 81 84. 11.49 84 87 11.49 87 90 11.49 90 93 11.49 93 96 11.49 96 99 11.09 99 102 11.07 102 105 11.07 105 108 11.07 108 111 11.07 111 114 10.87 114 117 10.86 117 120 10.86 1 2 0 123 10.50 123 126 10.50 126 129 10.50 129 132 10.50 132 135 10.50 135 138 10.50.... ... ]]138 141 1 10.50 Note: This table represents historical input for the Rev, 3 analysis and earlier. Rev. 4 and Rev. 5 analyses are based on plant temperature rise data presented in Attachment G.

Non-proprietary version REVISION NO. 8 CALCULATION NO. L-002457 PAGE NO. 40 Table 7.2 -Plant Temperature t9se (2 of 6)Starting Time (hr)Ending Time (hr)Plant Temperature Rise (Deg F)I I 141 144 10.50 144 147 10.50 147 150 10.50 150 153 10.50 153 156 10.50 156 159 10.50 159 162 10.50 162 165 10.50 165 168 10.27 168 171 9.99 171 174 9.99 174 177 9.99 177 180 9.99 180 183 9.99 183 186 9.99 186 189 9.99 189 192 9.99 192 195 9.99 195 198 9.99 198 201 9.99 201 204 9.99 204 207 9.99 207 210 9.99 210 213 9.99 213 216 9.99 216 219 9.99 219 222 9.99 222 225 9.72 225 228 9.70 228 231 9.70 231 234 9.70 234 237 9.70 237 240 9.70 240 243 9.54 243 246 9.54 246 249 9.54 249 252 9.54 252 255 9.54 255 258 9.54 258 261 9.54 261 264 9.54 264 267 9.54 267 270 9.54 270 273 9.54 273 276 9.54 276 279 9.40 279 282 9.19 282 285 9.19 285 1 288 9.19.11 JJ Note: This table represents historical input for the Rev. 3 analysis and earlier. Rev. 4 and Rev. 5 analyses are based on plant temperature rise data presented in Attachment G.

Non-proprietary version REVISION NO. 8 CALCULATION NO. L-002457 PAGE NO. 41 Table 7.2 -Plant Temperature Rise (3 of 6)Starting Time (tr)Ending Time (hr)Plant Temperature Rise (Den F)I III 288 291 9.19 291 294 9.19 294 297 9.19 297 300 9.19 300 303 9.19 303 306 9.19 306 309 9.19 309 312 9.19 312 315 9.19 315 318 9.19 318 321 9.19 321 324 9.19 324 327 9.19 327 330 9.19 330 333 9.19 333 336 9.19 336 339 9.19 339 342 9.19 342 345 9.19 345 348 9.19 348 351 9.19 351 354 9.19 354 357 9.19 357 360 9.19 360 363 9.19 363 366 9.19 366 369 9.19 369 372 9.19 372 375 9.19 375 378 9.19 378 381 9.19 381 384 9.19 384 387 9.19 387 390 9.19 390 393 9.19 393 396 9.19 396 399 9.19.399 402 9.19 402 405 9.19 405 408 9.19 408 411 9.19 411 414 9.19 414 417 9.15 417 420 8.85 420 423 8.85 423 426 8.85 426 429 8.85 429 432 8.85 432 435 I 8.85 Note: This table represents historical input for the Rev. 3 analysis and earlier. Rev. 4 and Rev. 5 analyses are based on plant temperature rise data presented in Attachment G.

Non-proprietary version REVISION NO. 8 CALCULATION NO. L-002457 PAGE NO. 42 Table 7.2 -Plant Temperature Rise (4 of 6)Starting Time (hr)Ending Time (hr)Plant Temperature Rise (Dea F)435 438 8.85 438 441 8.85 441 444 8.85 444 447 8.85 447 450 8.85 450 453 8.85 453 456 8.85 456 459 8.85 459 462 8.85 462 465 8.85 465 468 8.85 468 471 8.85 471 474 8.85 474 477 8.85 477 480 8.85 480 483 8.72 483 486 8.70 486 489 8.70 489 492 8370 492 495 8.70 495 498 8.70 498 501 8.70 501 504 8.70 504 507 8.70 507 510 8.70 510 513 8.70 513 516 8.70 516 519 8.70 519 522 8.70 522 525 8.70 525 528 8.70 528 531 8.70 531 534 8.70 534 537 8.70 537 540 8.70 540 543 8.70 543 546 8.70 546 549 8.70 549 552 8.70 552 555 8.70 555 558 8.52 558 561 8.49 561 564 8.49 564 567 8.49 567 570 8.49 570 573 8.49 573 576 8.49 576 579 8.49 579 582 8.49 11 Note: This table represents historical input for the Rev. 3 analysis and earlier. Rev. 4 and Rev. 5 analyses are based on plant temperature rise data presented in Attachment G.

Non-proprietary version REVISION NO. 8 CALCULATION NO. L-002457 PAGE NO. 43 Table 7.2 -Plant Temperature Rise (5 of 6)Starting Time (hr)Ending Time (hr)Plant Temperature Rise (Deg F)I 582 585 8.49 585 588 8.49 588 591 8.49 591 594 8.49 594 597 8.49 597 600 8.49 600 603 8.49 603 606 8.49 606 609 8.49 609 612 8.49 612 615 8.49 615 618 8.49 618 621 8.49 621 624 6.49 624 627 8.49 627 630 8.49 630 633 8.49 633 636 8.49 636 639 8.49 639 642 8.49 642 645 8.49 645 648 8.49 648 651 8.49 651 654 8.49 654 657 8.49 657 660 8.49 660 663 8.49 663 666 8.49 666 669 8.49 669 672 .8.49 672 675 8.49 675 678 8.49 678 681 8.49 681 684 8.49 684 687 8.49 687 690 8.49 690 693 8.49 693 696 8.49 696 699 8.49 699 702. 8.49 702 705 8.49 705 708 8.49 708 711 8.49 711 714 8.49 714 717 8.49 717 720 8.44 720 723 8.22 723 726 8.22 726 1 729 8.22 1]Note: This table represents historical input for the Rev. 3 analysis and earlier. Rev. 4 and Rev. 5 analyses are based on plant temperature rise data presented in Attachment G.

Non-proprietary version REVISION NO. 8 CALCULATION NO. L-002457 PAGE NO. 44 Table 7.2 -Plant Temperature Rise (6 of 6)Starting Time (hr)Ending Time (hr)Plant Temperature Rise (Den F)729 732 8.22 732 735 8.22 735 738 8.22 738 741 8.22 741 744 8.22 744 747 8.22 747 750 8.22 750 753 8.22 753 756 8.22 756 759 8.22 759 762 8.22 762 765 8.22 765 768 8.22 768 771 8.22 771 774 8.22 774 777 8.22 777 780 8.22 780 783 8.22 783 786 8.22 786 789 8.22 789 792 8.22 792 795 8.22 795 798 8.22 798 801 8.22 801 804 8.22 804 807 8.22 807 810 8.22 810 813 8.22 813 816 8.22-816 819 8.22 819 822 8.22 822 825 8.22 825 828 8.22 828 831 8.22 831 834 8.22 834 837 822 837 840 8.22 840 843 8.22 843 846 8.22 846 849 8.22 849 852 8.22 852 855 8.22 855 858 8.22 858 861 8.22 861 864 8.22 36 Day Average Heat Load_Note: This table represents historical input for the Rev. 3 analysis and earlier. Rev. 4 and Rev. 5 analyses are based on plant temperature rise data presented in Attachment G.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 45 Table 7.3: Maximum Allowable Initial Lake Temperatures Maximum Maximum Sediment Time of Day Allowable Initial Peak 30-Day Case iUmiting Weather Condition Accumulation Start Time Temperature Temperature Drawdown 0000 0.0 ft 0:00 100.0 OF 100.00 OF -0003 worst day temperature 0.0 ft 3:00 99.3 OF 99.94 OF 0006 worst day temperature 0.0 ft 6:00 98.6 OF 99.98 "F _0009 worst day temperature 0.0 ft 9:00 98.0 OF 100.00 OF _0009 worst 5/1/30 day temperatures 0.0 ft 9:00 98.0 OF 99.94 OF 1.35 ft 0012 worst 511130 day temperatures 0.0 ft 12:00 98.5 OF 99.99 OF 1.35 ft 0015 worst 5/1/30 day temperatures 0.0 ft 15:00 99.5 OF 99.94 OF 1.35 ft 0018 -_0.0 ft 18:00 100.0 OF 100.00 OF -0021 -0.0 ft 21:00 100.0 OF 100.00 OF 0600 0.5 ft 0:00 100.0 OF 100.00 OF 0603 worst day temperature 0.5 ft 3:00 99.2 OF 99.96 "F 0606 worst day temperature 0.5 ft 6:00 97.9 "F 99.98 OF 0609 worst 511/30 day temperatures 0.5 ft 9:00 97.5 OF 99.98 "F 1.35 ft 0612 worst 5/1/30 day temperatures 0.5 ft 12:00 98.3 OF 99.96 "F 1.35 ft 0615 worst 511/30 day temperatures 0.5 It 15:00 99.5 OF 99.97 "F 1.36 ft 0618 0.5 ff 18:00 100.0*F 100.00 "F -0621 0.5 ff 21:00 100.0 OF 100.00"F -1800 1.5 ff 0:00 100.0 OF 100.00"F -1803 worst day temperature 1.5 ft 3:00 98.8 OF 99.96 OF 1806 worst day temperature 1.5 ft 6:00 97.2 OF 99.98 OF 1809 worst day temperature 1.5ft 9:00 96.5 OF 99.98 OF 1809 worst 511/30 day temperatures 1.5 ft 9:00 96.5 OF 99.80 "F 1.35 ft 1812 orst5/1/30 day temperatures 1.5 ft 12:00 97.5 F 99.Q8 OF .t 1815 worst 5/1/30 day temperatures 1.5ft 15:00 99.4OF 99.97 OF 1.36 ft 1818 1.5 ft 18:00 100.0 OF 100.00"F -1821 1.5ft 21:00 100.0 OF 100.00 OF 00e worst 30 day evaporation 0.0 ft 12:00 97.6 OF 99.95 OF 1.46 ft 06e worst 30 day evaporation 0.5 ft 12:00 97.4 OF 99.97 "F 1.46 ft 18e worst 30 day evaporation 1.5 ft 12:00 96.8 OF 99.97 OF 1.48 ft Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102'F plant intake temperature limit, and Attachment H for a 1047F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 101 100 REVISION NO. 8 Fig. 7.1: Uml"ng Lake Temperatures vs. Time of Day PAGE NO. 46 e a I 0 99 98 97 ,- Lake Response to Worst Dm In Weather History 93.0 300 600 900 1200 1600 1800 2100 Tkne of Day (his)Note: This table represents historical results for the Rev. 3 analysis.

Rev. 4 and Rev. 5 analyses results are presented in Attachments G and H, respectively.

2400 I CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 47 Fig. 7.2, Case 0009: UHS LOCA Temperature Transient Updated Worst 36-Day Temperature Period (d = 0 in, t 0900 hrs, Ti m 98.OF)130 120-utts h4d Taqw8ture J-UHS Tor"Mrb" V\j A\AV\Ai(\-N A týýýM IL*a U t.110 100 VAIAIAI\NI\X N A. AAIV\V-W vvv$J V 'flu I 70- , .........' ............0 1 2 3 4 5 8 7 8 9 10 11 U2 13 14 15 16 17 IS It 2D 21 22 23 24 25 26 2V 28 20 3D 31 32 33 34 35. 36 Days after SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102*F plant intake temperature limit, and Attachment H for a 104'F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 48 Fig. 7.3, Case 0009: UHS LOCA Drawdown First 30 Days of Updated Worst 36-Day Temperature Period (d = 0 in, t = 0900 hrs, Ti a 98.OF)69025 I.0 i 2 3 4 5 6 7 8 9 10 11 12 U3 14 15 16 17 18 19 2 21 22 23 24 25 28 27 28 29 30 Days aft SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102 0 F plant intake temperature limit, and Attachment H for a 104'F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 49 Fig. 7.4, Case 00e: UHS LOCA Temperature Transient Updated Worst 30-Day Evaporation Period (d .0 In, t 1200 hts, Tij ST7.F)130 -UHS tWi TanPKrui-UHS OuM~ Tempeashure 120"110 A A.2* 00 90 0 1 2 3 4 5 6 7 8 9 10 1 1 2 13 14 15 16 17 18 10 2D 21 22 23 24 25 28 27 28 2D 30 Day after SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 1027F plant intake temperature limit, and Attachment H for a 104*1F plant intake temperature limit These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 50 Fig. 7.5, Case 00e: UNS LOCA Drawdown Updated Worst 30-Day Evaporation Period (d = 0 In, t = 1200 hrs, Ti = 97.6F)6N0.25 690.00 689.75-1 0C'I 689.50 689.25 689.00 668.76 688.50 688.25 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 25 27 28 29 30 Days after SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102OF plant intake temperature limit, and Attachment H for a 104OF plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 51 Fig. 7.6, Case 060S: UH, LOCA Temperature Transient Updated Worst 36-Day Temperature Period (d =6 in, t = 0900 hrs, Ti = 97.5F)o100 Ad NA 0 1 2 3 4 S 6 7 6 0 10 11 12 13 14 15 16 17 18 19 2D 21 22 23 24 2S .2 27 28 20 30 31 32 33 34 35 36 DmYS Sft~er SCRAM Note: The tables and figures here rpresent historical aalysis results for the Rev. 3 calculatior.

Current design analysis is based on results reported in Attachment G for a 102'F plant intake temperature limit, and Attachment H for a 1047F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 52 Fig. 7.7, Case 0609: UHS LOCA Drawdown First 30 Days of Updated Worst 36-Day Temperature Period (d -in, t a0900 hrs, T1 = 97J5F)690.25 UP 44 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1s 16 17 18 19 2D 21 22 23 24 25 26 27 28 29 30 ( Dap after SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102 0 F plant intake temperature limit, and Attachment H for a 104'F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 53 Fig. 7.8, Case 06e: UHS LOCA Temperature Transient Updated Worst 304Day Evaporation Period (d = 6 in, t = 1200 hrs, T1 = 97AF)110"t100 I* 100 0 f 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Days after SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102'F plant intake temperature limit, and Attachment H for a 104OF plant intake temperature limit. TFhese results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 54 Fig. 7.9, Case 06e: UHS LOCA Drawdown Updated Worst 30-Day Evaporation Period (d a 6 in, t -1200 hrs, Ti = 97.4F)69025 C 2 0j 0 t 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 28 27 28 20 30 Dap aft SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102'1F plant intake temperature limit, and Attachment H for a 104°F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 55 Fig. 7.10, Case 1809: UHS LOCA Tem-perature Transient Updated Worst 36-Day Temperature Period (d = 18 in, t = 0900 hrs, T1 = 96.5F)L- 130 0-D 120 CD 110 E CD F 100 1D Cz 4b" 90 C C ca 8 70 0 1 2 3 4 5 6 7 8 9 1011121314151617181920212223242526272B2930313233343536 Days after SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102'F plant intake temperature limit, and Attachment H for a 104'F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 56 Fig. 7.11, Case 1809; UKS LOCA Drawdown First 30 Days of Updated Worst 36-Day Temperature Period (d = 16 In, t= 0900 hrs, Ti = 96SUF)C.r 0 2 3 4 5 e 7 8 9 10 11 12 13 14 1 .817 1812D 21 22'23 24 2C 2A 27 M 20 3D*nA Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 1027F plant intake temperature limit, and Attachment H for a 104*F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 57 Fig. 7.12, Case 18e: UHS LOCA Temperature Transient Updated Worst 30-Day Evaporation Period (d : 18 In, t = 1200 hrs, Ti , 96.8F)C LD 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2 21 22 23 24 25, 25 27 25 29 30 Days after SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102'F plant intake temperature limit, and Attachment H for a 104*F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 58 Fig. 7.13, Case IBe: UNS LOCA Drawdown Updated Worst 30-Cay Evaporation Period (d a 18 in, t 1200 hrs, TI = 96.8F)I I U w 2 0 1 2 3 4 5 6 T 8 9 10 11 12 13 14 15 16 IT 18 19 20 21 22 23 24 25 28 27 28 29 30 Days after SCRAM Note: The tables and figures here represent historical analysis results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102 0 F plant intake temperature limit, and Attachment H for a 104*F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM.

CALCULATION NO. L-002457 REVISION NO. 8 PAGE NO. 59 LAST PAGE OF MAIN BODY Figure 7.14 UBS Heat Load Followrng LOCA Q00.0.J.800.0 700.0 600.0-E~500.0 400.0 z 2 300.0 200.0 100.0-0. 1 ....- ......-. I I .0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 28 27 28 29 30 31 32 33 34 35 38 Das altw SCRAM Note: The tables and figures here represent historical analysLs results for the Rev. 3 calculation.

Current design analysis is based on results reported in Attachment G for a 102-F plant intake temperature limit, and Attachment H for a 1047F plant intake temperature limit. These results do, however, provide the basis for the controlling time for the start of the limiting transient, 9 AM. FINAL PAGE CALCULATION NO. L-002457 REVISION NO. 8 ATTACHMENT A PAGE Al OF A22 Attachment A UIHSAV(; Files UHSAVG10 Version 1.0 -Sargent & Lundy Program No. 03.7.642-1.0 User 0J2069 on PC5121 Tuesday, March 7, 2000 Time: 15:05:48 Controlled Files: Drive V: = SNL1 SYS3: \Volume in drive V is SYS3[Base] \MAXDAT. EXE (Base] \UHSAVG2.

EXE[Base] \WRITE.EXE

[Base] \UHSAVG$.BAT 08-11-1997 19:56 08-11-1997 19:55 08-20-1997 10:45 10-06-1997 16:29 ps489661 bin 26,080,178 12-08-97 4: 12p uhsavgO uhsavgl8 uhsavg6 msg0 msgl8-msg6 wO000 w0300 w0600 w0900 w1200 w1200e w1500 w1800 w2100 inp inp inp sym sym sym inp inp inp inp inp inp inp inp inp 141 142 141 4,553 4,553 4,553 03-07-00 03-07-00 03-07-00 03-07-00 03-07-00 03-07-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-08-00 03-02-00 03-02-00 03-02-00 2: 35p 2:35p 2 :35p 3:03p 3 :08p 3 :06p 11: 10a 11 : 06a 11: Ila 11: 05a 11: 00a 10:31a 11: 09a 11: 10a 11: 10a 301 301 301 301 301 312 301 301 301 PROJECT NO. 11333-297 ATTACHMENT A PAGE A2 OF A22 CALCULATION NO. L-002457 REVISION NO. 8 MSGO. SYM 0 1 3 1 19480705.17526 184 .EO6 86.0 40 8 240 240 288 0 0 83 .83 97.464.9 C: \COMED\LASALLE\WEATHER\PS489661 .BIN PROJECT NO. 11333-297 ATTACHMENT A PAGE A3 OF A22 CALCULATION NO. L-002457 REVISION NO. 8 MSG6.SYM 0 1 3 1 19480705.17526 184.E06 86.0 40 8 240 240 288 0 0 82.99 97.423.5 C:\COMED\LASALLE\WEATHER\PS489661.BIN PROJECT NO. 11333-297 ATTACHMENT A PAGE A4 OF A22 CALCULATION NO. L-002457 REVISION NO. 8 MSG18. SYM 0 1 3 1 19480705.17526 184.E06 86.0 40 8 240 240 288 0 0 81.35 97.341.4 C:\COMED\LASALLE\WEATHER\PS489661.BIN PROJECT NO. 11333-297 ATTACHMENT A PAGE A5 OF A22 CALCULATION NO. L-002457 REVISION NO. 8 SARGENT & LUNDY LLC UHSAVG PROGRAM ULTIMATE HEAT SINK ANALYSIS DETERMINATION OF DESIGN TEMPERATURE AND WATER LOSS PERIODS INPUT DATA COMMON TO BOTH TOWER AND POND: VALIDATION OPTION (CREATE AN OUTPUT FILE WITH TEMPERATURE (OF POND OR TOWER AIR), AND WATER LOSS VALUES, WRITTEN ONCE PER 3-HOUR PERIOD);NO=0, YES=2 = 0 IUHS (SELECTION OPTION; 1=POND, 2=TOWER) = 1 NUMPER (NUMBER OF SUB-PERIODS WITHIN THE 36-DAY COMBINED TEMPERATURE PERIOD -SHOULD ALWAYS BE=3) -3 LPLIM (NUMBER OF 3-HR PERIODS OVER WHICH DATA IS AVERAGED -SHOULD ALWAYS BE SET TO 1) -1 SDATE (STARTING DATE FOR THE UHSAVG PROCESSING

-6 DIGITS COMBINING YEAR, MONTH, AND DAY) = 19480705.IDYLIM (THE TOTAL NUMBER OF DAYS TO BE PROCESSED)

= 17526 QLOAD (HEAT REJECTED BY THE POWER STATION -AVERAGE OVER THE PERIOD SPECIFIED IN REG. GUIDE 1.27 -BTU/HR) = 184000000.00 FLOW (POWER STATION ESSENTIAL SERVICE WATER FLOW, PLUS ANY ADDITIONAL FLOW -CFS) -86.00 I2LIM (THE NUMBER OF 3-HR INTERVALS IN EACH OF 5 DIFFERENT SUB-PERIODS THAT ARE IDENTIFIED

-40 8 240 240 288 INPUT DATA SPECIFIC TO PONDS ONLY: IPCP (OPTION FOR INCLUSION OF PRECIP IN WATER LOSS CALCULATIONS (O=NO, 1=YES)) = 0 EXTRA (EXTRA RUNOFF AREA FOR INCLUSION OF PRECIP IN WATER LOSS PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A6 OF A22 A IAREA OF POND UIHS -ACRES) = 1.3 TI (INITIAL POND TEMPERATURE SET BY THE USER -DEG F) = 97.00 VI (INITIAL POND VOLUME SET BY THE USER -ACRE-FT) = 464.90 NAMES OF EXTERNAL FILES USED FOR THIS RUN OF UHSAVG: INPUT TEXT FILE WITH USER OPTION INPUT: INPUT BINARY FILE WITH WEATHER DATA: C:\COMED\LASALLE\WEATHER\PS489661.BIN OUTPUT TEXT FILE WITH RESULTS: MSGO.SYM OUTPUT TEXT FILE WITH VALIDATION DATA: STARTING DATE WAS FOUND AND PROCESSING WAS STARTED.PROCESSING WAS COMPLETED, AND DESIGN WEATHER PERIODS WERE SELECTED.

THESE PERIODS ARE LISTED BELOW, AFTER THE DEFINITIONS.

DEFINITION OF "AVERAGE TEMPERATURE":

FOR A POND, THE "AVERAGE TEMPERATURE" FOR THE PERIOD REFERS TO THE AVERAGE BULK TEMP OF THE POND WATER, WHICH IS ASSUMED TO BE THOROUGHLY MIXED.FOR A TOWER, THE "AVERAGE TEMPERATURE" FOR THE PERIOD REFERS TO THE AVERAGE WET BULB TEMPERATURE.

DEFINITION OF "AVERAGE EVAPORATION": "AVERAGE EVAPORATION" IN THE CASE OF EITHER A POND OR A TOWER REFERS TO THE AVERAGE EVAPORATIVE WATER LOSS FROM THE COOLING SYSTEM DURING THE PERIOD.DEFINITION OF THE DECIMAL PORTION OF THE START AND END DATES FOR EACH SELECTED WORST-CASE PERIOD: THE DECIMAL PORTION IDENTIFIES ONE OF THE EIGHT 3-HOUR PERIODS OF THAT DAY.FOR EXAMPLE, "I" IS THE FIRST 3-HOUR PERIOD, AND "8" IS THE LAST 3-HR PERIOD PROJECT NO. 11333-297 ATTACHMENT A REVISION NO. 8 PAGE A7 OF A22 CALCULATION NO. L-002457 THE LENGTH OF THE FIRST COMPONENT OF THE COMBINED TEMPERATURE PERIOD WAS: 5.000 DAYS AVERAGE TEMPERATURE WAS: 93.413 DEG F PERIOD STARTS ON 19950712.4 PERIOD FINISHES ON 19950717.3 THE LENGTH OF THE SECOND COMPONENT OF THE COMBINED TEMPERATURE PERIOD WAS: 1.000 DAYS AVERAGE TEMPERATURE WAS: 94.699 DEG F PERIOD STARTS ON 19950715.5 PERIOD FINISHES ON 19950716.4 THE LENGTH OF THE THIRD COMPONENT OF THE COMBINED TEMPERATURE PERIOD WAS: 30.000 DAYS AVERAGE TEMPERATURE WAS: 89.138 DEG F PERIOD STARTS ON 19830710.6 PERIOD FINISHES ON 19830809.5 THE LENGTH OF THE EVAPORATION PERIOD WAS: 30.000 DAYS AVERAGE EVAPORATION WAS: 1.859 CFS PERIOD STARTS ON 19540618.5 PERIOD FINISHES ON 19540718.4 THE LENGTH OF THE WORST-CASE CONSECUTIVE TEMPERATURE PERIOD WAS: 36.000 DAYS AVERAGE TEMPERATURE WAS: 89.060 DEG F PERIOD STARTS ON 19950726.7 PERIOD FINISHES ON 19950831.6 PROJECT NO. 11333-297 ATTACHMENT A PAGE A8 OF A22 CALCULATION NO. L-002457 REVISION NO. 8 File: MSG6.SYM SARGENT & LUNDY LLC UHSAVG PROGRAM ULTIMATE HEAT SINK ANALYSIS DETERMINATION OF DESIGN TEMPERATURE AND WATER LOSS PERIODS INPUT DATA COMMON TO BOTH TOWER AND POND: VALIDATION OPTION (CREATE AN OUTPUT FILE WITH TEMPERATURE (OF POND OR TOWER AIR), AND WATER LOSS VALUES, WRITTEN ONCE PER 3-HOUR PERIOD);NO=0, YES=1 = 0 IUHS (SELECTION OPTION; 1=POND, 2=TOWER) = 1 NUMPER (NUMBER OF SUB-PERIODS WITHIN THE 36-DAY COMBINED TEMPERATURE PERIOD -SHOULD ALWAYS BE=3) 3 LPLIM (NUMBER OF 3-HR PERIODS OVER WHICH DATA IS AVERAGED -SHOULD ALWAYS BE SET TO 1) 1 SDATE (STARTING DATE FOR THE UHSAVG PROCESSING

-6 DIGITS COMBINING YEAR, MONTH, AND DAY) = 19480705.IDYLIM (THE TOTAL NUMBER OF DAYS TO BE PROCESSED)

-17526 QLOAD (HEAT REJECTED BY THE POWER STATION -AVERAGE OVER THE PERIOD SPECIFIED IN REG. GUIDE 1.27 -BTU/HR) -184000000.00 FLOW (POWER STATION ESSENTIAL SERVICE WATER FLOW, PLUS ANY ADDITIONAL FLOW -CFS) -86.00 I2LIM (THE NUMBER OF 3-HR INTERVALS IN EACH OF 5 DIFFERENT SUB-PERIODS THAT ARE IDENTIFIED

-40 8 240 240 288 INPUT DATA SPECIFIC TO PONDS ONLY: IPCP (OPTION FOR INCLUSION OF PRECIP IN WATER LOSS CALCULATIONS (0=NO, I=YES)) = 0 EXTRA (EXTRA RUNOFF AREA FOR INCLUSION PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A9 OF A22 OF PRECIP IN WATER LOSS CALCULATIONS

-(ACRES)) = .00 A (AREA OF POND UHS -ACRES) = 82.99 TI (INITIAL POND TEMPERATURE SET BY THE USER -DEG F) = 97.00 VI (INITIAL POND VOLUME SET BY THE USER -ACRE-FT) = 423.50 NAMES OF EXTERNAL FILES USED FOR THIS RUN OF UHSAVG: INPUT TEXT FILE WITH USER OPTION INPUT: INPUT BINARY FILE WITH WEATHER DATA: C:\COMED\LASALLE\WEATHER\PS489661.BIN OUTPUT TEXT FILE WITH RESULTS: MSG6.SYM OUTPUT TEXT FILE WITH VALIDATION DATA: STARTING DATE WAS FOUND AND PROCESSING WAS STARTED.PROCESSING WAS COMPLETED, AND DESIGN WEATHER PERIODS WERE SELECTED.

THESE PERIODS ARE LISTED BELOW, AFTER THE DEFINITIONS.

DEFINITION OF "AVERAGE TEMPERATURE":

FOR A POND, THE "AVERAGE TEMPERATURE" FOR THE PERIOD REFERS TO THE AVERAGE BULK TEMP OF THE POND WATER, WHICH IS ASSUMED TO BE THOROUGHLY MIXED.FOR A TOWER, THE "AVERAGE TEMPERATURE" FOR THE PERIOD REFERS TO THE AVERAGE WET BULB TEMPERATURE.

DEFINITION OF "AVERAGE EVAPORATION": "AVERAGE EVAPORATION" IN THE CASE OF EITHER A POND OR A TOWER REFERS TO THE AVERAGE EVAPORATIVE WATER LOSS FROM THE COOLING SYSTEM DURING THE PERIOD.DEFINITION OF THE DECIMAL PORTION OF THE START AND END DATES FOR EACH SELECTED WORST-CASE PERIOD: THE DECIMAL PORTION IDENTIFIES ONE OF THE EIGHT 3-HOUR PERIODS OF THAT DAY.FOR EXAMPLE, "1" IS THE FIRST 3-HOUR PROJECT NO. 11333-297 ATTACHMENT A PAGE A10 OF A22 CALCULATION NO. L-002457 REVISION NO. 8 OF THE DAY.THE LENGTH OF THE FIRST COMPONENT OF THE COMBINED TEMPERATURE PERIOD WAS: 5.000 DAYS AVERAGE TEMPERATURE WAS: 93.565 DEG F PERIOD STARTS ON 19950712.2 PERIOD FINISHES ON 19950717.1 THE LENGTH OF THE SECOND COMPONENT OF THE COMBINED TEMPERATURE PERIOD WAS: 1.000 DAYS AVERAGE TEMPERATURE WAS: 94.791 DEG F PERIOD STARTS ON 19950715.5 PERIOD FINISHES ON 19950716.4 THE LENGTH OF THE THIRD COMPONENT OF THE COMBINED TEMPERATURE PERIOD WAS: 30.000 DAYS AVERAGE TEMPERATURE WAS: 89.208 DEG F PERIOD STARTS ON 19830710.5 PERIOD FINISHES ON 19830809.4 THE LENGTH OF THE EVAPORATION PERIOD WAS: 30.000 DAYS AVERAGE EVAPORATION WAS: 1.845 CFS PERIOD STARTS ON 19540618.5 PERIOD FINISHES ON 19540718.4 THE LENGTH OF THE WORST-CASE CONSECUTIVE TEMPERATURE PERIOD WAS: 36.000 DAYS AVERAGE TEMPERATURE WAS: 89.104 DEG F PERIOD STARTS ON 19950726.7 PERIOD FINISHES ON 19950831.6 PROJECT NO. 11333-297 ATTACHMENT A PAGE All OF A22 CALCULATION NO. L-002457 REVISION NO. 8 File: MSGI8.SYM SARGENT & LUNDY LLC UHSAVG PROGRAM ULTIMATE HEAT SINK ANALYSIS DETERMINATION OF DESIGN TEMPERATURE AND WATER LOSS PERIODS INPUT DATA COMMON TO BOTH TOWER AND POND: VALIDATION OPTION (CREATE AN OUTPUT FILE WITH TEMPERATURE (OF POND OR TOWER AIR), AND WATER LOSS VALUES, WRITTEN ONCE PER 3-HOUR PERIOD);NO=0, YES=1 = 0 IUHS (SELECTION OPTION; 1=POND, 2=TOWER) = 1 NUMPER (NUMBER OF SUB-PERIODS WITHIN THE 36-DAY COMBINED TEMPERATURE PERIOD -SHOULD ALWAYS BE=3) 3 LPLIM (NUMBER OF 3-HR PERIODS OVER WHICH DATA IS AVERAGED -SHOULD ALWAYS BE SET TO1) 1 SDATE (STARTING DATE FOR THE UHSAVG PROCESSING

-6 DIGITS COMBINING YEAR, MONTH, AND DAY) = 19480705.IDYLIM (THE TOTAL NUMBER OF DAYS TO BE PROCESSED)

-17526 QLOAD (HEAT REJECTED BY THE POWER STATION -AVERAGE OVER THE PERIOD SPECIFIED IN REG. GUIDE 1.27 -BTU/HR) 184000000.00 FLOW (POWER STATION ESSENTIAL SERVICE WATER FLOW, PLUS ANY ADDITIONAL FLOW -CFS) -86.00 I2LIM (THE NUMBER OF 3-HR INTERVALS IN EACH OF 5 DIFFERENT SUB-PERIODS THAT ARE IDENTIFIED

-40 8 240 240 288 INPUT DATA SPECIFIC TO PONDS ONLY: IPCP (OPTION FOR INCLUSION OF PRECIP IN WATER LOSS CALCULATIONS (0=NO, 1=YES)) = 0 EXTRA (EXTRA RUNOFF AREA FOR INCLUSION OF PRECIP IN WATER LOSS PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A12 OF A22 A (AREA OF POND UHS -ACRES) = 81.35 TI (INITIAL POND TEMPERATURE SET BY THE USER -DEG F) = 97.00 VI (INITIAL POND VOLUME SET BY THE USER -ACRE-FT) = 341.40 NAMES OF EXTERNAL FILES USED FOR THIS RUN OF UHSAVG: INPUT TEXT FILE WITH USER OPTION INPUT: INPUT BINARY FILE WITH WEATHER DATA: C:\COMED\LASALLE\WEATHER\PS489661.BIN OUTPUT TEXT FILE WITH RESULTS: MSG18.SYM OUTPUT TEXT FILE WITH VALIDATION DATA: STARTING DATE WAS FOUND AND PROCESSING WAS STARTED.PROCESSING WAS COMPLETED, AND DESIGN WEATHER PERIODS WERE SELECTED.

THESE PERIODS ARE LISTED BELOW, AFTER THE DEFINITIONS.

DEFINITION OF "AVERAGE TEMPERATURE":

FOR A POND, THE "AVERAGE TEMPERATURE" FOR THE PERIOD REFERS TO THE AVERAGE BULK TEMP OF THE POND WATER, WHICH IS ASSUMED TO BE THOROUGHLY MIXED.FOR A TOWER, THE "AVERAGE TEMPERATURE" FOR THE PERIOD REFERS TO THE AVERAGE WET BULB TEMPERATURE.

DEFINITION OF "AVERAGE EVAPORATION": "AVERAGE EVAPORATION" IN THE CASE OF EITHER A POND OR A TOWER REFERS TO THE AVERAGE EVAPORATIVE WATER LOSS FROM THE COOLING SYSTEM DURING THE PERIOD.DEFINITION OF THE DECIMAL PORTION OF THE START AND END DATES FOR EACH SELECTED WORST-CASE PERIOD: THE DECIMAL PORTION IDENTIFIES ONE OF THE EIGHT 3-HOUR PERIODS OF THAT DAY.FOR EXAMPLE, "1" IS THE FIRST 3-HOUR PERIOD, AND "8" IS THE LAST 3-HR PERIOD PROJECT NO. 11333-297 ATTACHMENT A PAGE A13 OF A22 CALCULATION NO. L-002457 REVISION NO. 8 THE LENGTH OF THE FIRST COMPONENT OF THE COMBINED TEMPERATURE PERIOD WAS: 5.000 DAYS AVERAGE TEMPERATURE WAS: 93.865 DEG F PERIOD STARTS ON 19950712.1 PERIOD FINISHES ON 19950716.8 THE LENGTH OF THE SECOND COMPONENT OF THE COMBINED TEMPERATURE PERIOD WAS: 1.000 DAYS AVERAGE TEMPERATURE WAS: 94.935 DEG F PERIOD STARTS ON 19950715.5 PERIOD FINISHES ON 19950716.4 THE LENGTH OF THE THIRD COMPONENT OF THE COMBINED TEMPERATURE PERIOD WAS: 30.000 DAYS AVERAGE TEMPERATURE WAS: 89.334 DEG F PERIOD STARTS ON 19830710.5 PERIOD FINISHES ON 19830809.4 THE LENGTH OF THE EVAPORATION PERIOD WAS: 30.000 DAYS AVERAGE EVAPORATION WAS: 1.820 CFS PERIOD STARTS ON 19540618.5 PERIOD FINISHES ON 19540718.4 THE LENGTH OF THE WORST-CASE CONSECUTIVE TEMPERATURE PERIOD WAS: 36.000 DAYS AVERAGE TEMPERATURE WAS: 89.191 DEG F PERIOD STARTS ON 19950726.5 PERIOD FINISHES ON 19950831.4 PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A14 OF A22 0 MSG-WRIT.

SYM C:\WAKELAND\LASALLE\PS489661.BIN TCOMOO.BIN TOO.BIN E30.BIN TEXT.TXT 1995 7 12 1 1995 7 16 8 1995 7 15 5 1995 7 16 4 1983 7 10 6 1983 8 9 5 1995 7 15 1 1995 8 19 8 1954 6 18 4 1954 7 18 3 0 PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A15 OF A22 MSG-WRIT.

SYM C:\WAKELAND\LASALLE\PS489661.BIN TCOM03.BIN T03.BIN E30.BIN TEXT.TXT 1995 7 12 2 1995 7 17 1 1995 7 15 5 1995 7 16 4 1983 7 10 6 1983 8 9 5 1995 7 15 2 1995 8 20 1 1954 6 18 4 1954 7 18 3 PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A16 OF A22 0 MSG-WRIT.SYM C:\WAKELAND\LASALLE\PS489661.BIN TCOM06.BIN T06.BIN E30.BIN TEXT.TXT 1995 7 12 3 1995 7 17 2 1995 7 15 5 1995 7 16 4 1983 7 10 6 1983 8 9 5 1995 7 15 3 1995 8 20 2 1954 6 18 4 1954 7 18 3 PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A17 OF A22 0 MSG-WRIT.

SYM C:\WAKELAND\LASALLE\PS489661.BIN TCOM09.BIN T09.BIN E30.BIN TEXT.TXT 1995 7 12 4 1995 7 17 3 1995 7 15 5 1995 7 16 4 1983 7 10 6 1983 8 9 5 1995 7 15 4 1995 8 20 3 1954 6 18 4 1954 7 18 3 PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A18 OF A22 0 MSG-WRIT.SYM C:\WAKELAND\LASALLE\PS489661.BIN TCOM12.BIN T12.BIN E30.BIN TEXT.TXT 1995 7 12 5 1995 7 17 4 1995 7 15 5 1995 7 16 4 1983 7 10 6 1983 8 9 5 1995 7 15 5 1995 8 20 4 1954 6 18 4 1954 7 18 3 PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A19 OF A22 0 MSG-WRIT.

SYM C: \WAKELAND\LASALLE\PS489661.

BIN TCOM1 5.BIN T15. BIN E30.BIN TEXT.TXT 1995 7 12 6 1995 7 17 5 1995 7 15 5 1995 7 16 4 1983 7 10 6 1983 8 9 5 1995 7 15 6 1995 8 20 5 1954 6 18 4 1954 7 18 3 PROJECT NO. 11333-297 ATTACHMENT A CALCULATION NO. L-002457 REVISION NO. 8 PAGE A20 OF A22 0[i MSG-WRIT.

SYM C: \WAKELAND\LASALLE\PS489661.BIN TCOM18.BIN T18 .BIN E30.BIN TEXT. TXT 1995 7 12 7 1995 7 17 6 1995 7 15 5 1995 7 16 4 1983 7 10 6 1983 8 9 5 1995 7 15 7 1995 8 20 6 1954 6 18 4 1954 7 18 3 PROJECT NO. 11333-297 ATTACHMENT A PAGE A21 OF A22 CALCULATION NO. L-002457 REVISION NO. 8 0 MSG-WRIT.SYM C:\WAKELAND\LASALLE\PS489661 .BIN TCOM21.BIN T21.BIN E30.BIN TEXT.TXT 1995 7 12 8 1995 7 17 7 1995 7 15 5 1995 7 16 4 1983 7 10 6 1983 8 9 5 1995 7 15 8 1995 8 20 7 1954 6 18 4 1954 7 18 3 PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 ATTACHMENT A PAGE A22 OF A22 MSGWRT.SYM C:\COMED\LASALLE\WEATHER\PS489661.BIN TCOMUAVG.BIN T36UAVG.BIN E3012.BIN TEXT.TXT 1995 7 12 2 1995 7 17 1995 7 15 5 1995 7 16 1983 7 10 6 1983 8 9 1995 7 26 7 1995 8 31 1 4 5 6 4 1954 6 18 5 1954 7 18 PROJECT NO. 11333-297 ATTACHMENT B PAGE B1 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 Attachment B LAXET-PC Output LAKET10 Version 1.0 User 0H9449 on PC5407 User 0J2069 on PC5121 Controlled Files:-Sargent & Lundy Program No. 03.7.292-1.0 Wednesday, February 23, 2000 Time: 14:12:20 Drive V: = SNLISYS3:

\Volume in drive V is SYS3[Base] \PIA8586 .BIN[Base] \LPRINT. EXS[Base] \BRAUHS3A.BIN

[Base] \LAKET$.BAT

[Base] \BRAUHS3A.DAT (Base] \LAKET.EXE

[Base] \TEST.DAT[Base] \LAKETRUN.BAT 03-31-1992 08-03-1995 08-01-1995 07-02-1996 08-02-1995 10-27-1997 11-23-1992 10-24-1997 16:04 11:42 21:06 11:49 16:57 08:45 14 :00 13:27 LAKET Plot Program -Sargent & Lundy Program No. 03.7.292-1.2 User 0H9449 on PC5407 Wednesday, February 23, 2000 User 0J2069 on PC5121 Directory of C:\WAKELAND\LASALLE c0000 c0003 c0006 c0009 comO009 coma012 comO015 c0018 c0021 c0600 c0603 c0606 com0609 com0612 com0615 c0618 c0621 c1800 c1803 c1806 c1809 com1809 com1812 com1815 c1818 c1821 cOOe c06e cl8e dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat dat 2,323 2,321 2,322 2,322 2,326 2,326 2,326 2,323 2,323 2,887 2,885 2,886 2,889 2, 890 2,890 2,887 2,887 2,929 2,927 2,928 2,928 2,932 2,931 2,932 2,929 2,929 2,595 2,597 2,640 03-03-00 03-03-00 03-03-00 03-03-00 03-07-00 03-06-00 03-06-00 03-03-00 03-03-00 03-03-00 03-03-00 03-03-00 03-06-00 03-06-00 03-06-00 03-03-00 03-03-00 03-03-00 03-03-00 03-03-00 03-03-00 03-07-00 03-06-00 03-06-00 03-03-00 03-03-00 03-08-00 03-08-00 03-08-00 2: 08p 2: 31p 2:54p 2:09p 5:29p 11: 19a 1: 01p 2: 10p 2: lip 2:14p 2:35p 2: 59p 10:24a 11:21a 11:23a 2: lip 2: lip 2: 15p 2:46p 3 : 08p 3: 13p 5:34p 11:21a 1:09p 2: 17p 2: 17p 10 :45a 10:53a 11: 15a PROJECT NO. 11333-297 ATTACHMENT B PAGE B2 OF B358 CALCULATION NO. L-002457 Directory of C:\WAKELAND\LASALLE REVISION NO. 8 e3012 too t03 t06 t09 t12 tis t18 t21 tcom00 tcom03 tcom06 tcom09 tcoml2 tcoml5 tcom18 tcom2l bin bin bin bin bin bin bin bin bin bin bin bin bin bin bin bin bin 44,642 53,570 53,570 53,570 53,570 53,570 53,570 53,570 53,570 53,570 53,570 53,570 53,570 53,570 53,570 53,570 53,570 03-08-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 03-02-00 10: 38a 1:44p 1: 4 5p 1: 46p 1:4 7 p 1:4 9 p 1:50p 1: 52p 1: 5 3p 1:44p 1:45p 1:46p 1: 4 7 p 1:49p 1:50p 1: 52p 1: 53p PROJECT NO. 11333-297 ATTACHMENT B PAGE B3 OF B358 CALCULATION NO. L-002457 Program :LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 1 Date : 03/03/2000 Time : 14:18:14.18 Case 0000: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 0000; power upra 1 2 3 4 5 070100 1 1 690.83 .83 82.15 80.55 78.96 77.33 29.70 1 100.0 R/I S/I 080500 20 0.2 690.464.9 381.9 300.5 220.8 142 .6 71.7 0 95.5 1 1 5500.1.75.45 73.94 72.50 71.06 69.60 26.73 0 6 418.4 343.7 270.5 198.7 128.4 65.6 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13 .88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 86.0 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B4 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Date 03/03/2000 Time 14:18:14.18 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B5 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Date 03/03/2000 Time 14:18:14.18 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9. 19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B6 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time 14:18:14.24 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B7 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Date : 03/03/2000 Time 14:18:14.24 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8 .49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B8 OF B358 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 199?REVISION NO. 8 Date : 03/03/2000 Time 14:18:14.29 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B9 OF B358 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time : 14:18:14.79 Case 0000: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 0000; power upra RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : I CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 83.830 464.900 75.450 418.400 689.000 82.150 381.900 73.940 343.700 688.000 80.550 300.500 72.500 270.500 687.000 78.960 220.800 71.060 198.700 686.000 77.330 142.600 69.600 128.400 685.000 29.700 71.700 26.730 65.600 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 100.00 95.50 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B10 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date : 03/03/2000 Time : 14:18:14.79 Case 0000: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.0F

@ 0000; power upra FPLANT 70100 -80500 R/I 86.000 TPRIS8 70100 -80500 S/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10 .500 10 .500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE Bll OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8,220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B12 OF B358 Number 03.7.292-1.0 0 Date : 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time 14:18:15.12 Case 0000: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.0F

@ 0000; power upra SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.18 TOTAL EVAP (CFS) .00 -1.39 -1.24 -1.37 NATURAL EVAP (CFS) 00 -.76 -.69 -.75 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.82 92.57 89.34 LAKE INLET TEMP (F) .00 99.72 101.75 100.01 LAKE OUTLET TEMP (F) .00 89.96 93.55 90.46 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.3 89.1 LAKE INLET TEMP (F) 126.0 109.0 99.3 LAKE OUTLET TEMP (F) 98.8 96.8 90.2 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B13 OF B358 Number 03.7.292-1.0 0 Date : 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time : 14:18:15.12 Case 0000: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.0F

@ 0000; power upra CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.18 TOTAL EVAP (CFS) .00 -1.39 -1.24 -1.37 NATURAL EVAP (CFS) .00 -.76 -.69 -.75 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.82 92.57 89.34 LAKE INLET TEMP (F) .00 99.72 101.75 100.01 LAKE OUTLET TEMP (F) .00 89.96 93.55 90.46 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.3 89.1 LAKE INLET TEMP (F) 126.0 109.0 99.3 LAKE OUTLET TEMP (F) 98.8 96.8 90.2 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B14 OF B358 REVISION NO. 8 Date : 03/03/2000 Time 14:18:15.12 Case 0000: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 0000; power upra TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

LAKE SEEPAGE (CFS) -.16 8051900)TOTAL EVAP (CFS) -.25 8041900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) -.25 8041900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 97.62 7011900)LAKE INLET TEMP (F) 133.76 7011900)LAKE OUTLET TEMP (F) 99.39 7011900)TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.54-3.55-1.67.00.00.00.00.00 688.66.00 82.69 93.35 84.26 7011900)7031900)7031900)7021900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7071900)7261900)7071900)-.18-1.37-.75-.62.00.00.00.00.00 689.28.00 89.34 100.01 90.46-1.26223E+01

-9.78239E+01

-5.38859E+01

-4.39380E+01 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.00000E+00 0.OOOOOE+00 4.92180E+04 0.OOOOOE+00 6.37916E+03 7.14096E+03 6.45926E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 95.3 89.1 126.0 109.0 99.3 98.8 96.8 90.2 PROJECT NO. 11333-297 ATTACHMENT B PAGE B15 OF B358 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date : 03/03/2000 Time : 14:31:48.34 Case 0003: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=99.3F G 0300; power uprat 1 2 3 4 5 070100 1 1 690.83.83 82.15 80.55 78.96 77.33 29.70 1 99.3 R/I S/I 080500 20 0.2 690.464.9 381.9 300.5 220.8 142.6 71.7 0 94 .8 1 1 5500.1.75.45 73.94 72.50 71.06 69.60 26.73 0 6 418.4 343.7 270.5 198.7 128.4 65.6 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13 .30 13 .24 12 .73 12 .73 12.57 12.43 12 .24 12 .02 12 .02 12.02 12.02 12.01 22.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 86.0 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B16 OF B358 CALCULATION NO. L-002457 Number 03.7,292-1.0 0 Created Mon Oct 27 08:45:58 1997 Date : 03/03/2000 Time : 14:31:48.40 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10 .50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B17 OF B358 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 Date : 03/03/2000 Time : 14:31:48.40 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B18 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time 14:31:48.40 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B19 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time : 14:31:48.40 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B20 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date : 03/03/2000 Time : 14:31:48.45 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B21 OF B358 Number 03.7.292-1.0 0 Date 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 14:31:48.73 Case 0003: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=99.3F @ 0300; power uprat RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 83.830 464.900 75.450 418.400 689.000 82.150 381.900 73.940 343.700 688.000 80.550 300.500 72.500 270.500 687.000 78.960 220.800 71.060 198.700 686.000 77.330 142.600 69.600 128.400 685.000 29.700 71.700 26.730 65.600 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 99.30 94.80 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B22 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time 14:31:48.73 Case 0003: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=99.3F @ 0300; power uprat FPLANT 70100 -80500 R/I 86.000 TPRISE 70100 -80500 S/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9 .190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14 .970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9,540 9.540 9.190 9.190 9.190 9. 190 9. 190 9. 190 9. 190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B23 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B24 OF B358 Number 03.7.292-1.0 0 Date : 03/03/2000 Created :Mon Oct 27 08:45:58 1997 Time : 14:31:48.89 Case 0003: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=99.3P 0 0300; power uprat SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 -.16 -.18 TOTAL EVAP (CFS) .00 -1.39 -1.27 -1.37 NATURAL EVAP (CFS) .00 -.76 -.71 -.76 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.80 92.61 89.33 LAKE INLET TEMP (F) .00 99.71 101.84 100.01 LAKE OUTLET TEMP (F) .00 89.95 93.64 90.46------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.3 89.1 LAKE INLET TEMP (F) 125.0 109.0 99.3 LAKE OUTLET TEMP (F) 99.0 96.8 90.2 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B25 OF B358 Number 03.7.292-1.0 0 Date 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time : 14:31:48.89 Case 0003: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=99.3F @ 0300; power uprat CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.18 TOTAL EVAP (CFS) .00 -1.39 -1.27 -1.37 NATURAL EVAP (CFS) .00 -.76 -.71 -.76 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.80 92.61 89.33 LAKE INLET TEMP (F) .00 99.71 101.84 100.01 LAKE OUTLET TEMP (F) .00 89.95 93.64 90.46------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.3 89.1 LAKE INLET TEMP (F) 125.0 109.0 99.3 LAKE OUTLET TEMP (F) 99.0 96.8 90.2 PROJECT NO. 11333-297 ATTACHMENT B PAGE B26 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 199?REVISION NO. 8 Date : 03/03/2000 Time 14:31:48.89 Case 0003: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=99.3F @ 0300; power uprat TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

....................................................................................................

LAKE SEEPAGE (CFS) -.16 8051900)TOTAL EVAP (CFS) -.25 8041900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) -.25 8041900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 690.00 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 97.60 7011900).LAKE INLET TEMP (F) 133.32 7011900)LAKE OUTLET TEMP (F) 99.94 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%......................................................

-.20-4.51-3.55-1.70.00.00.00.00.00 688.66.00 82.69 93.57 84.10 7011900)7031900)7031900)7021900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7071900)7261900)7071900)-.18-1.37-.76-.62.00.00.00.00.00 689.28.00 89.33 100.01 90.46-1.26209E+01

-9.78949E+01

-5.39557E+01

-4 .39392E+01 0 .OOOOOE+00 0 OOOOOE+00 0 OOOOOE+00 0 OOOOOE+00 0 OOOOOE+00 4.92179E+04 0.00000E+00 6.37839E+03 7.14110E+03 6.45933E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 125 .0 99.0 95.3 109.0 96.8 89.1 99.3 90.2 PROJECT NO. 11333-297 ATTACHMENT B PAGE B27 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time : 14:54:23.63 Case 0006: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.6F @ 0600; power uprat 1 2 3 4 5 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 070100 1 1 690.83.83 82.15 80.55 78.96 77.33 29.70 1 98.6 f/I s/I 080500 20 0.2 690.464.9 381.9 300.5 220.8 142.6 71.7 0 94 .1 86.0 1 5500.1.75.45 73 .94 72.50 71.06 69.60 26.73 0 6 418.4 343.7 270.5 198.7 128.4 65.6 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B28 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Date : 03/03/2000 Time : 14:54:23.68 11.07 11.07 11.07 10.87 10 .86 10 .86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B29 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 Date 03/03/2000 Time 14:54:23.68 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B30 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time 14:54:23.68 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8 .72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B31 OF B358 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date : 03/03/2000 Time 14:54:23.68 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B32 OF B358 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time : 14:54:23.79 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B33 OF B358 Number : 03.7.292-1.0 0 Date 03/03/2000 Created :Mon Oct 27 08:45:58 1997 Time : 14:54:24.23 Case 0006: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.6F @ 0600; power uprat RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EPP VOLUME 690.000 83.830 464.900 75.450 418.400 689.000 82.150 381.900 73.940 343.700 688.000 80.550 300.500 72.500 270.500 687.000 78.960 220.800 71.060 198.700 686.000 77.330 142.600 69.600 128.400 685.000 29.700 71.700 26.730 65.600 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 98.60 94.10 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B34 OF B358 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time 14:54:24.23 Case 0006: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.6F @ 0600; power uprat FPLANT 70100 -80500 R/I 86.000 TPRISE 70100 -80500 S/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12 .020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B35 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8,220 8.220 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE 636 OF 6358 Date : 03/03/2000 Time 14:54:24.40 Case 0006: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.6F @ 0600; power uprat SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE............................................- -----------------LAKE SEEPAGE (CFS) .00 -.18 TOTAL EVAP (CFS) .00 -1.39 NATURAL EVAP (CFS) .00 -.76 FORCED EVAP (CFS) .00 -.63 PRECIPITATION (CPS) .00 .00 MAKEUP (CFS) .00 .00 BLOWDOWN (CFS) .00 .00 RUNOFF (CFS) .00 .00 DAM SPILL (CFS) .00 .00 LAKE ELEVATION (FEET) .00 689.36 DISSOLVED SOLIDS (PPM) .00 .00 NATURAL LAKE TEMP (F) .00 88.75 LAKE INLET TEMP (F) .00 99.67 LAKE OUTLET TEMP (F) .00 89.91------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.16-1.29-.74-.55.00.00.00.00.00 688.75.00 92.63 101.81 93 61-.18-1.38-.76-.62.00.00.00.00.00 689.28.00 89.29 99.97 90.42 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)96.8 95.2 89.0 127.0 108.0 99.3 99.0 96.5 90.2 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B37 OF B358 REVISION NO. 8 Date 03/03/2000 Time : 14:54:24.40 Case 0006: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.6F @ 0600; power uprat CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CPS) .00 -.18 TOTAL EVAP (CFS) .00 -1.39 NATURAL EVAP (CPS) .00 -.76 FORCED EVAP (CFS) .00 -.63 PRECIPITATION (CFS) .00 .00 MAKEUP (CFS) .00 ,00 BLOWDOWN (CFS) .00 .00 RUNOFF (CFS) .00 .00 DAM SPILL (CFS) .00 .00 LAKE ELEVATION (FEET) .00 689.36 DISSOLVED SOLIDS (PPM) .00 .00 NATURAL LAKE TEMP (F) .00 88.75 LAKE INLET TEMP (F) .00 99.67 LAKE OUTLET TEMP (F) .00 89.91 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%------------------------------..........------..------

-.16-1.29-.74-.55.00.00.00.00.00 688.75.00 92.63 101.81 93.61-.18-1.38-.76-.62.00.00.00.00.00 689.28.00 89.29 99.97 90.42 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)96.8 95.2 89.0 127.0 108.0 99.3 99.0 96.5 90.2 PROJECT NO. 11333-297 ATTACHMENT B PAGE B38 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time : 14:54:24.45 Case 0006: LaSalle URS (Updated Worst 36-Day Temp.; Ti=98.6F @ 06006 power uprat TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

LAKE SEEPAGE (CFS)TOTAL EVAP (CFS)NATURAL EVAP (CFS)FORCED EVAP (CFS)PRECIPITATION (CFS)MAKEUP (CFS)BLOWDOWN (CFS)RUNOFF (CFS)DAM SPILL (CFS)LAKE ELEVATION (FEET)DISSOLVED SOLIDS (PPM)NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)-.16-.25.00-.25.00.00.00.00.00 689.99.00 97.34 132.80 99.98 8051900)8041900)7011900)8041900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)-.20-4.51-3.53-1.62.00.00.00.00.00 688.66.00 82.67 93.42 84.00 7011900)7031900)7031900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7071900)7261900)7071900)-.18-1.38-.76-.62.00.00.00.00.00 689.28.00 89.29 99.97 90.42-1.26178E+01

-9.81999E+01-S.42259E+01

-4.39740E+01 0.OOOOOE+00 0.0000DE+00 0.00000E+00 0.OOOOOE+00 0.00000E+00 4.92179E+04 0.OOOOOE+00 6.37598E+03 7.13817E+03 6.45642E+03 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)96.8 95.2 89.0 127.0 108.0 99.3 99.0 96.5 90.2 PROJECT NO. 11333-297 ATTACHMENT B PAGE B39 OF B358 CALCULATION NO. L-002457 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Time : 15:10:29.38 Case 0009: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.OF @ 0900; power uprat 1 2 3 4 5 070100 1 1 690.83.83 82.15 80.55 78.96 77.33 29.70 1 98.0 R/I S/I 080500 20 0.2 690.464.9 381.9 300.5 220.8 142.6 71.7 0 93.5 1 5500.1.75.45 73.94 72.50 71.06 69.60 26.73 0 6 418.4 343.7 270.5 198.7 128.4 65.6 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13 .30 13 .30 13 .30 13.24 12 .73 12.73 12. 57 12 .43 12.24 12 .02 12 .02 12 .02 12 .02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 86.0 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B40 OF B358 CALCULATION NO. L-002457 Number :03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Date 03/03/2000 Time 15:10:29.38 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9 .99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B41 OF B358 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time 15:10:29.38 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B42 OF B358 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time 15:10:29.38 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8 .72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B43 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Date : 03/03/2000 Time 15:10:29.38 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B44 OF B358 CALCULATION NO. L-002457 Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Date : 03/03/2000 Time : 15:10:29.49 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8 .22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B45 OF B358 Number 03.7.292-1.0 0 Date : 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time : 15:10:29.99 Case 0009: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.OF @ 0900; power uprat RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 83.830 464.900 75.450 418.400 689.000 82.150 381.900 73.940 343.700 688.000 80.550 300.500 72.500 270.500 687.000 78.960 220.800 71.060 198.700 686.000 77.330 142.600 69.600 128.400 685.000 29.700 71.700 26.730 65.600 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 98.00 93.50 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B46 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Date 03/03/2000 Time 15:10:29.99 Case 0009: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.OF @ 0900; power uprat FPLANT 70100 -TPRISE 70100 -80500 R/I 80500 s/I 86.000 35.260 15.320 13.880 13 .300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9 .190 9 .190 9.190 9 .190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B47 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8 .220 8.220 8.220 8 .220 8.220 8 .220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B48 OF B358 Number 03.7.292-1.0 0 Date 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 15:10:30.26 Case 0009: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.0F @ 0900; power uprat SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.18 TOTAL EVAP (CFS) .00 -1.39 -1.31 -1.38 NATURAL EVAP (CFS) .00 -.76 -.76 -.76 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 ..00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.71 92.63 89.26 LAKE INLET TEMP (F) .00 99.63 101.80 99.93 LAKE OUTLET TEMP (F) .00 89.86 93.60 90.38------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.8 95.0 89.0 LAKE INLET TEMP (F) 128.0 107.0 99.3 LAKE OUTLET TEMP (F) 99.0 96.4 90.1 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B49 OF B358 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created :Mon Oct 27 08:45:58 1997 Time : 15:10:30.26 Case 0009: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.OF @ 0900; power uprat CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.18 TOTAL EVAP (CFS) .00 -1.39 -1.31 -1.38 NATURAL EVAP (CFS) .00 -.76 -.76 -.76 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF {CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (P) .00 88.71 92.63 89.26 LAKE INLET TEMP (F) .00 99.63 101.80 99.93 LAKE OUTLET TEMP (F) .00 89.86 93.60 90.38------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%------------------------------------------------------

NATURAL LAKE TEMP (F) 96.8 95.0 89.0 LAKE INLET TEMP (F) 128.0 107.0 99.3 LAKE OUTLET TEMP (F) 99.0 96.4 90.1 PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 ATTACHMENT B PAGE B50 OF B358 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 11 Date 03/03/2000 Time 15:10:30.26 Case 0009: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=98.0F @ 0900; power uprat TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE I VALUE (ACRE-FEET)

....................................................................................................

LAKE SEEPAGE (CFS) -.16 8051900)TOTAL EVAP (CFS) -.25 8041900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) -.25 8041900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 97.06 7011900)LAKE INLET TEMP (F) 133.90 7011900)LAKE OUTLET TEMP (F) 100.00 7011900)TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.60-3.51-1.63.00.00.00.00.00 688 .66.00 82.65 93 .50 84.00 7011900)7031900)7031900)7011900)7011900)7011900)7011900)7011900)7011900)80S19000 7011900)7061900)7251900)7061900)-.18-1.38-.76-.62.00.00.00.00.00 689.28.00 89.26 99.93 90.38-1.26189E+01

-9.83474E+01

-5.43582E+01

-4.39893E+01 0.OOOOOE+00 0.OOOOOE+00 0.00000E+00 0.OOOOOE+00 0.OOOOOE+00 4.92179E+04 0.00000E+00 6.37326E+03 7.13538E+03 6.45365E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)96.8 128.0 99.0 95.0 107.0 96.4 89.0 99.3 90.1 PROJECT NO. 11333-297 ATTACHMENT B PAGE B51 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 1 Date : 03/07/2000 Time 17:30:51.66 Case 0009: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=98.OF @ 0900; power u 1 2 070100 080500 1 1 3 1 20 4 1 0.2 5500. 0 5 690. 690. 1. 6 83.83 82.15 80.55 78.96 77.33 29.70 1 98.0 R/I S/I 464.9 381.9 300.5 220.8 142.6 71.7 0 93 .5 86.0 75.45 73.94 72.50 71.06 69.60 26.73 418.4 343.7 270.5 198.7 128.4 65.6 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B52 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 2 Date 03/07/2000 Time 17:30:51.71 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B53 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 3 Date 03/07/2000 Time 17:30:51.71 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B54 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date 03/07/2000 Time 17:30:51.71 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B55 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 5 Date : 03/07/2000 Time : 17:30:51.71 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8 .49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B56 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 6 Date : 03/07/2000 Time 17:30:51.82 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B PAGE B57 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 7 Date : 03/07/2000 Time 17:30:52.21 Case 0009: LaSalle UHS (Updated Worst 5/1/30-Day Temp.RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EF]690.000 83.830 464.900 689.000 82.150 381.900 688.000 80.550 300.500 687.000 78.960 220.800 686.000 77.330 142.600 685.000 29.700 71.700 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 98.00 93 WEATHER STATION ID 0.* Ti=98.OF @ 0900; power u 5500.00 F AREA 75.450 73.940 72.500 71.060 69.600 26.730 EFF VOLUME 418.400 343.700 270.500 198 .700 128.400 65.600.50 PROJECT NO. 11333-297 ATTACHMENT B PAGE B58 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 8 Date : 03/07/2000 Time 17:30:52.21 Case 0009: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=98.0F @ 0900; power u FPLANT 70100 -TPRISE 70100 -80500 R/I 80500 S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B59 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8 .490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B60 OF B358 Program LAKET-PC Page 9 Number 03.7.292-1.0 0 Date 03/07/2000 Created Mon Oct 27 08:45:58 1997 Time 17:30:52.54 Case 0009: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=98.OF @ 0900; power u SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.15 -.17 TOTAL EVAP (CFS) .00 -1.63 -1.32 -1.59 NATURAL EVAP (CFS) .00 -.99 -.77 -.96 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.57 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.87 89.48 90.67 LAKE INLET TEMP (F) .00 101.56 98.70 101.16 LAKE OUTLET TEMP (F) .00 91.80 90.52 91.62------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.8 90.8 LAKE INLET TEMP (F) 128.0 109.3 100.8 LAKE OUTLET TEMP (F) 99.0 97.1 91.8 PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 ATTACHMENT B PAGE B61 OF B358 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page 10 Date 03/07/2000 Time 17:30:52.54 Case 0009: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=98.OF 0 0900; power u CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE...................................................................- ------LAKE SEEPAGE (CFS) .00 -.18 TOTAL EVAP (CFS) .00 -1.63 NATURAL EVAP (CFS) .00 -.99 FORCED EVAP (CFS) .00 -.65 PRECIPITATION (CFS) .00 .00 MAKEUP (CFS) .00 .00 BLOWDOWN (CFS) .00 .00 RUNOFF (CFS) .00 .00 DAM SPILL (CFS) .00 .00 LAKE ELEVATION (FEET) .00 689.29 DISSOLVED SOLIDS (PPM) .00 .00 NATURAL LAKE TEMP (F) .00 90.87 LAKE INLET TEMP (F) .00 101.56 LAKE OUTLET TEMP (F) .00 91.80---------------------......-..---------.....-----...--

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.15-1.32-.77-.55.00.00.00.00.00 688.57.00 89.48 98.70 90.52-.17-1.59-.96-.63.00.00.00.00.00 689.19.00 90.67 101.16 91.62 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 95.8 90.8 128.0 109.3 100.8 99.0 97.1 91.8 PROJECT NO. 11333-297 ATTACHMENT B PAGE B62 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 11 Date 03/07/2000 Time 17:30:52.54 Case 0009: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=98.0F @ 0900; power u TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE VALUE (ACRE-FEET)

LAKE SEEPAGE (CFS) -.15 8051900)TOTAL EVAP (CFS) -.28 8051900)NATURAL EVAP (CFS) .00 7031900)FORCED EVAP (CFS) -.26 7311900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 97.57 7041900)LAKE INLET TEMP (F) 133.38 7011900)LAKE OUTLET TEMP (F) 99.94 7011900)TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-3.97-2.68-1.52.00.00.00.00.00 688.47.00 82.25 91.65 83.16 7011900)7051900)7051900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7241900)7241900)7241900)-.17-1.59-.96-63.00.00.00.00.00 689.19.00 90.67 101.16 91.62-1.24192E+01

-1.13531E+02

-6.83140E+01

-4.52166E+01 0.00000E+00 o.OOOOOE+00 o.OOOOOE+00 0.00000E+00 0.OOOOOE+00 4.92118E+04 0.OOOOOE+00 6.47458E+03 7.22337E+03 6.54203E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 128.0 99.0 95.8 109.3 97.1 90.8 100.8 91.8 PROJECT NO. 11333-297 ATTACHMENT B PAGE B63 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 1 Date 03/06/2000 Time : 11:12:17.94 Case 0012: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=98.5F @ 1200; power uprat 1 2 070100 080500 1 1 3 1 20 4 1 0.2 5500. 0 5 690. 690. 1. 6 83.83 82.15 80.55 78 .96 77.33 29.70 1 98.5 R/I S/I 464.9 381.9 300.5 220.8 142.6 71.7 0 94.0 75.45 73.94 72.50 71.06 69.60 26.73 418.4 343.7 270.5 198.7 128.4 65.6 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 86.0 PROJECT NO. 11333-297 ATTACHMENT B PAGE B64 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03,7.292-1.0 0 Created Monx Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date 03/06/2000 Time : 11:12:17.99 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10 ,50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9. 99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B65 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 3 Date 03/06/2000 Time : 11:12:18.05 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B66 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page Date Time* 4* 03/06/2000

• 11:12:18.05 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8 .85 8.85 8 .85 8.85 8 .85 8 .72 8 .70 8 .70 8 .70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8 .70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B67 OF B358 Page : 5 Date 03/06/2000 Time : 11:12:18.05 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B68 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page : 6 Date : 03/06/2000 Time 11:12:18.05 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B PAGE B69 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 7 Date : 03/06/2000 Time 11:12:18.43 Case 0012: LaSalle UNS (Updated Worst 5/1/30-Day Temp.; Ti=98.5F @ 1200; power uprat RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: I ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE:.20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

=690.00 DRAWDOWN CURVE ELEVATION 690.000 689.000 688.000 687.000 686.000 685.000 PLOT FILE FREQ TOTAL AREA 83.830 82.150 80.550 78.960 77.330 29.700 1 INCREMENTS A'TOTAL VOLUME 464.900 381.900 300.500 220.800 142.600 71.700 r 0 HOURS EFF AREA 75.450 73.940 72.500 71.060 69.600 26.730 EFF VOLUME 418.400 343.700 270.500 198.700 128.400 65.600 INITIAL FORCED/NATURAL LAKE TEMPS. =98.50 94.00 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B70 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 8 Date : 03/06/2000 Time 11:12:18.43 Case 0012: LaSalle URS (Updated Worst 5/1/30-Day Temp.; Ti=98.5F @ 1200; power uprat FPLANT 70100 -TPRISE 70100 -80500 R/I 80500 S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9,540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9,190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 12.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 a PROJECT NO. 11333-297 ATTACHMENT B PAGE B71 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8,490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220.8.220 8.220 8.490 8 ,490 8.490 8.490 8 .490 8.490 8,490 8.490 8.490 8.490 8.490 8.490 8.490 8 .490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8 .220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8,490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B72 OF B358 Program : LAKET-PC Page : 9 Number 03.7.292-1.0 0 Date : 03/06/2000 Created :Mon Oct 27 08:45:58 1997 Time : 11:12:18.76 Case 0012: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=98.SF @ 1200; power uprat SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 -.15 -.17 TOTAL EVAP (CFS) .00 -1.64 -1.32 -1.59 NATURAL EVAP (CFS) .00 -.99 -.77 -.96 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 0 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 SLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.57 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.88 89.48 90.68 LAKE INLET TEMP (F) .00 101.58 98.69 101.18 LAKE OUTLET TEMP (F) .00 91.81 90.51 91.63------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.8 90.9 LAKE INLET TEMP (F) 128.0 109.2 101.0 LAKE OUTLET TEMP (F) 99.0 96.9 91.8 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B73 OF B358 Program : LAKET-PC Page 10 Number : 03.7.292-1.0 0 Date : 03/06/2000 Created Mon Oct 27 08:45:58 1997 Time 11:12:18.76 Case 0012: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=98.5F @ 1200; power uprat CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.15 -.17 TOTAL EVAP (CFS) .00 -1.64 -1.32 -1.59 NATURAL EVAP (CFS) .00 -.99 -.77 -.96 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.57 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) ,00 90.88 89.48 90.68 LAKE INLET TEMP (F) .00 101.58 98.69 101.18 LAKE OUTLET TEMP (F) .00 91.81 90.51 91.63------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%------------------------------------------------------

NATURAL LAKE TEMP (F) 97.0 95.8 90.9 LAKE INLET TEMP (F) 128.0 109.2 101.0 LAKE OUTLET TEMP (F) 99.0 96.9 91.8 PROJECT NO. 11333-297 ATTACHMENT B PAGE B74 OF B358 CALCULATION NO. L-002457 Programn LAKET-PC Number 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 11 Date 03/06/2000 Time 11:12:18.76 Case 0012: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=98.SF a 1200; power uprat TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE VALUE (ACRE-FEET)

---

. ....................................................................-- ----LAKE SEEPAGE (CFS) .15 8051900)TOTAL EVAP (CFS) .28 8051900)NATURAL EVAP (CFS) .00 7031900)FORCED EVAP (CFS) .26 7311900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 97.50 7041900)LAKE INLET TEMP (F) 134.83 7011900)LAKE OUTLET TEMP (F) 99.99 7011900)TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-3.86-2.67-1.54.00.00.00.00.00 688.47.00 82.24 91.65 83.16 7011900)7051900)7051900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7241900)7241900)7241900)-.17-1.59-.96-.63.00.00.00.00.00 689.19.00 90.68 101.18 91.63-1.24163E+01

-1.13675E+02

-6.84598E+01

-4. 52152E+01 0 OOOOOE+00 0. 00000E+00 0 OOOOOE+00 0 .00000E+00

0. 00000E+00 4. 92117E+04 0 .OOOOOE+00 6 .47533E+03 7.22482E+03 6.54307E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 95.8 128.0 109.2 99.0 96.9 90.9 101.0 91.8 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B75 OF B358 Page : 1 Date 03/06/2000 Time : 13:02:19.27 Case 0015: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=99.5F @ 1500; power u 1 2 3 4 5 070100 1 1 690.83 .83 82.15 80.55 78.96 77.33 29.70 1 99.5 R/I S/I 080500 20 0.2 690.464.9 381.9 300.5 220.8 142.6 71.7 0 95.0 86.0 1 1 5500.1.75.45 73.94 72.50 71.06 69.60 26.73 0 6 418.4 343.7 270.5 198.7 128.4 65.6 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14 .97 14 53 14.29 13.88 13 45 13.30 13.30 13.30 13.24 12 73 12,73 12,57 12,43 12,24 12 02 12 02 12 02 12 02 12,01 11,49 11.49 11,49 11,49 11.49 11,49 11.49 11.49 11.09 11.07 PROJECT NO. 11333-297 ATTACHMENT B PAGE B76 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date 03/06/2000 Time : 13:02:19.27 11.07 11.07 11.07 10.87 10.86 10.86 10 50 10 .50 10 .50 10 .50 10 .50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10 .50 10 .50 10 .27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B77 OF B358 CALCULATION NO. L-002457 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 3 Date : 03/06/2000 Time : 13:02:19.27 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9 .19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B78 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date 03/06/2000 Time 13:02:19.27 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8 .72 8 .70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B79 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 5 Date : 03/06/2000 Time : 13:02:19.27 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B80 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page : 6 Date : 03/06/2000 Time 13:02:19.38 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B81 OF B358 Program : LAKET-PC Page : 7 Number : 03.7.292-1.0 0 Date 03/06/2000 Created :Mon Oct 27 08:45:58 1997 Time : 13:02:19.87 Case 0015: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=99.5F @ 1500; power u RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 83.830 464.900 75.450 418.400 689.000 82.150 381.900 73.940 343.700 688.000 80.550 300.500 72.500 270.500 687.000 78.960 220.800 71.060 198.700 686.000 77.330 142.600 69.600 128.400 685.000 29.700 71.700 26.730 65.600 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 99.50 95.00 WEATHER STATION ID 0.PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B82 OF B358 REVISION NO. 8 Page 8 Date 03/06/2000 Time 13:02:19.87 Case 0015: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=99.5F @ 1500; power u FPLANT 70100 -TPRISE 70100 -80500 R/I 80500 s/I 86.000 35.260 15.320 13 .880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9,700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190" 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 o -A 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 0 -nn PROJECT NO. 11333-297 ATTACHMENT B PAGE B83 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8 .490 8 .490 8 .490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8 220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B84 OF B358 Program LAKET-PC Page: 9 Number 03.7.292-1.0 0 Date 03/06/2000 Created : Mon Oct 27 08:45:58 1997 Time 13:02:19.98 Case 0015: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=99.SF @ 1500; power u SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.15 -.17 TOTAL EVAP (CFS) .00 -1.64 -1.32 -1,60 NATURAL EVAP (CFS) .00 -1.00 -.77 -.96 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.56 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.84 89.49 90.65 LAKE INLET TEMP (F) .00 101.54 98.70 101.14 LAKE OUTLET TEMP (F) .00 91.77 90.51 91.59 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.8 95.6 90.9 LAKE INLET TEMP (F) 127.0 109.3 101.0 LAKE OUTLET TEMP (F) 98.8 96.9 91.8 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B85 OF B358 Program : LAKET-PC Page 10 Number : 03.7.292-1.0 0 Date : 03/06/2000 Created :Mon Oct 27 08:45:58 1997 Time : 13:02:20.04 Case 0015: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=99.5F @ 1500; power u CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.15 -.17 TOTAL EVAP (CFS) .00 -1.64 -1.32 -1.60 NATURAL EVAP (CFS) .00 -1.00 -.77 -.96 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL ICFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.56 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.84 89.49 90.65 LAKE INLET TEMP (F) .00 101.54 98.70 101.14 LAKE OUTLET TEMP (F) .00 91.77 90.51 91.59------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.8 95.6 90.9 LAKE INLET TEMP (F) 127.0 109.3 101.0 LAKE OUTLET TEMP (F) 98.8 96.9 91.8 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B86 OF B358 REVISION NO. 8 Page 11 Date 03/06/2000 Time 13:02:20.04 Case 0015: LaSalle UHS (Updated Worst 5/1/30-Day Temp.; Ti=99.5F 0 1500; power u TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

LAKE SEEPAGE (CFS) -.15 8051900)TOTAL EVAP (CFS) .28 8051900)NATURAL EVAP (CFS) .00 7031900)FORCED EVAP (CFS) -.26 7311900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 (7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 -7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 97.35 7041900)LAKE INLET TEMP (F) 135.20 7011900)LAKE OUTLET TEMP (F) 99.94 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.09-3.27-1.58.00.00.00.00.00 688.47.00 82.24 91.54 83 .05 7011900)7051900)7051900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7241900)7241900)7241900)-.17-1.60-.96-.63.00.00.00.00.00 689.19.00 90.65 101.14 91.59-1.24086E+01

-1.14028E+02

-6.88232E+01

-4.S2052E+01 O.OOOOOE+00 0.0000OE+00 O.OOOOOE+00 0.00000E+00 0.OOOOOE+00 4.92115E+04 0.OOOOOE+00 6.47283E+03 7.22206E+03 6.S4024E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)96.8 95.6 90.9 127.0 109.3 101.0 98.8 96.9 91.8 PROJECT NO. 11333-297 ATTACHMENT B PAGE B87 OF B358 CALCULATION NO. L-002457 Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8-Dte : 03/03/2000 Time : 16:32:04.07 Case 0018: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.0F 9 1800; power upra 1 2 3 4 5 7 8 999 PPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14 .53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 070100 1 1 690.83.83 82.15 80.55 78.96 77.33 29.70 1 100.0 R/I s/I 080500 20 0.2 690.464.9 381.9 300.5 220.8 142 .6 71.7 0 95.5 86 .0 1 1 5500.1.75.45 73.94 72.50 71.06 69.60 26.73 0 6 418.4 343,7 270.5 198.7 128.4 65.6 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B88 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page: 2 Date 03/03/2000 Time 16:32:04.13 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.S0 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B89 OF B358 REVISION NO. 8 Page : 3 Date 03/03/2000 Time 16:32:04.13 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9 .19 9 .19 9.19 9.19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 19 9.19 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B90 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 Page : 4 Date : 03/03/2000 Time 16:32:04.13 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B91 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page : 5 Date 03/03/2000 Time : 16:32:04.13 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B92 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 6 Date : 03/03/2000 Time : 16:32:04.23 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B93 OF B358 Program : LAKET-PC Page : 7 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time 16:32:04.67 Case 0018: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 1800; power upra RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 83.830 464.900 75.450 418.400 689.000 82.150 381.900 73.940 343.700 688.000 80.550 300.600 72.500 270.500 687.000 78.960 220.800 71.060 198.700 686.000 77.330 142.600 69.600 128.400 685.000 29.700 71.700 26.730 65.600 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 100.00 95.50 WEATHER STATION ID 0.PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE 894 OF B358 REVISION NO. 8 Page : 8 Date : 03/03/2000 Time : 16:32:04.67 Case 0018: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.0F

@ 1800; power upra FPLANT 70100 -80500 R/I TPRISE 70100 -80500 S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10,500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9 .S40 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9,190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.680 14.S30 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10,500 9.990 9.990 9.990 9.990 9.720 9.700 9,540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 7nn PROJECT NO. 11333-297 CALCULATION NO. L-002457 ATTACHMENT B PAGE B95 OF B358 REVISION NO. 8 o. Iv.8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8 .490 8 .490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B96 OF B358 Page : 9 Date : 03/03/2000 Time : 16:32:04.95 Case 0018: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 1800; power upra SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 TOTAL EVAP (CFS) .00 -1.37 NATURAL EVAP (CFS) .00 -.75 FORCED EVAP (CFS) .00 -.62 PRECIPITATION (CFS) .00 .00 MAKEUP (CFS) .00 .00 BLOWDOWN (CFS) .00 .00 RUNOFF (CFS) .00 .00 DAM SPILL (CFS) .00 .00 LAKE ELEVATION (FEET) .00 689.37 DISSOLVED SOLIDS (PPM) .00 .00 NATURAL LAKE TEMP (F) .00 88.54 LAKE INLET TEMP (F) .00 99.46 LAKE OUTLET TEMP (F) .00 89.70------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-------------------------------------------------.16-1.34-.79-.55.00.00.00.00.00 688.76.00 92.57 101.72 93.51-.18-1.37-.76-.61.00.00.00.00.00 689.29.00 89.10 99.77 90.23 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)95.8 94.4 126.0 105.5 97.5 95.7 88.9 99.3 90.0 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B97 OF B358 Program LAKET-PC Page 10 Number 03.7.292-1.0 0 Date 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time 16:32:04.95 Case 0018: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.0F

@ 1800; power upra CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.18 TOTAL EVAP (CFS) .00 -1.37 -1.34 -1.37 NATURAL EVAP (CPS) .00 -.75 -.79 -.76 FORCED EVAP (CFS) .00 -.62 -.55 -.61 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.37 688.76 689.29 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.54 92.57 89.10 LAKE INLET TEMP (F) .00 99.46 101.72 99.77 LAKE OUTLET TEMP (F) .00 89.70 93.51 90.23------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%------------------------------------------------------

NATURAL LAKE TEMP (F) 95.8 94.4 88.9 LAKE INLET TEMP (F) 126.0 105.5 99.3 LAKE OUTLET TEMP (F) 97.5 95.7 90.0 PROJECT NO. 11333-297 ATTACHMENT B PAGE B98 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 11 Date 03/03/2000 Time 16:32:04.95 Case 0018: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 1800; power upra TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

.............. ........................................................................-- -----LAKE SEEPAGE (CFS) -.16 8051900)TOTAL EVAP (CFS) .25 8031900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) .25 8031900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 96.38 8031900)LAKE INLET TEMP (F) 133.93 7011900)LAKE OUTLET TEMP (F) 98.67 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%------------------------------------------------------

-.20-4.62-3.41-1.38.00.00.00.00.00 688.66.00 82.53 93.44 83.86 7011900)7021900)7021900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7061900)7251900)7061900)-.18-1.37-.76-.61.00.00.00.00.00 689.29.00 89.10 99.77 90.23-1.26427E+01

-9.78120E+01

-5.39938E+01

-4.38182E+01 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.00000E+00 0.OOOOOE+00 4.92186E+04 0.OOOOE+00 6.36231E+03 7.12436E+03 6.44259E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)95.8 126.0 97.5 94 .4 105 .5 95.7 88.9 99.3 90.0 PROJECT NO. 11333-297 ATTACHMENT B PAGE B99 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 1 Date 03/03/2000 Time 16:39:49.73 Case 0021: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 2100; power upra 1 2 070100 080500 1 1 3 1 20 4 1 0.2 5500. 0 5 690. 690. 1. 6 83.83 82.15 80.55 78.96 77.33 29.70 1 100.0 RP/s/I 464.9 381.9 300.5 220.8 142.6 71.7 0 95.5 75.45 73.94 72.50 71.06 69.60 26.73 418.4 343.7 270.5 198.7 128.4 65.6 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 86.0 PROJECT NO. 11333-297 CALCULATION NO. L-002457 vrogram L.j.k' Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B100 OF B358 Date 03/03/2000 Time ; 16:39:49.78 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE Bl01 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 3 Date 03/03/2000 Time 16:39:49.78 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B102 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 4 Date : 03/03/2000 Time 16:39:49.78 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8 .72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B103 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 5 Date : 03/03/2000 Time : 16:39:49.78 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B104 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 6 Date 03/03/2000 Time : 16:39:49.89 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B PAGE B105 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 7 Date 03/03/2000 Time : 16:39:50.00 Case 0021: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 2100; power upra RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE:.20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

=690.00 DRAWDOWN CURVE ELEVATION 690.000 689.000 688.000 687.000 686.000 685.000 PLOT FILE FREQ TOTAL AREA 83.830 82.150 80.550 78.960 77.330 29.700 1 INCREMENTS TOTAL VOLUME 464.900 381.900 300.500 220.800 142.600 71.700 AT 0 HOURS EFF AREA 75.450 73 .940 72.500 71.060 69.600 26.730 EFF VOLUME 418.400 343.700 270.500 198.700 128.400 65.600 INITIAL FORCED/NATURAL LAKE TEMPS. =100.00 95.50 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B106 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 8 Date : 03/03/2000 Time : 16:39:50.28 Case 0021: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 2100; power upra FPLANT 70100 -80500 TPRISE 70100 -80500 R/I S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B107 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8,490 8.490 8 .490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8 .220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B108 OF B358 Program LAKET-PC Page 9 Number : 03.7.292-1.0 0 Date 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 16:39:50.55 Case 0021: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 2100; power upra SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 -.16 -.18 TOTAL EVAP (CFS) .00 -1.38 -1.37 -1.37 NATURAL EVAP (CFS) .00 -.75 -.82 -.76 FORCED EVAP (CFS) .00 -.62 -.55 -.61 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.37 688.76 689.29 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.57 92.54 89.12 LAKE INLET TEMP (F) .00 99.50 101.66 99.80 LAKE OUTLET TEMP (F) .00 89.74 93.46 90.25 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.0 94.4 88.9 LAKE INLET TEMP (F) 126.0 105.3 99.3 LAKE OUTLET TEMP (F) 97.7 95.7 90.1 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B109 OF B358 Program : LAKET-PC Page : 10 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time : 16:39:50.55 Case 0021: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=100.OF

@ 2100; power upra CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 -.16 -.18 TOTAL EVAP (CFS) .00 -1.38 -1.37 -1.37 NATURAL EVAP (CPS) .00 -.75 -.82 -.76 FORCED EVAP (CFS) .00 -.62 -.55 -.61 PRECIPITATION (CPS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CPS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CPS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.37 688.76 689.29 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.57 92.54 89.12 LAKE INLET TEMP (F) .00 99.50 101.66 99.80 LAKE OUTLET TEMP (F) .00 89.74 93.46 90.25 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.0 94.4 88.9 LAKE INLET TEMP (F) 126.0 105.3 99.3 LAKE OUTLET TEMP (F) 97.7 95.7 90.1 PROJECT NO. 11333-297 ATTACHMENT B PAGE Bl10 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 11 Date 03/03/2000 Time 16:39:50.55 Case 0021: LaSalle UHS (Updated Worst 36-Day Temp.; Ti=I00.OF

@ 2100; power upra TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

...............................- ----------------------------------LAKE SEEPAGE (CFS) -.16 8051900)TOTAL EVAP (CFS) -.25 8031900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) -.25 8031900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 96.38 8031900)LAKE INLET TEMP (F) 133.75 7011900)LAKE OUTLET TEMP (F) 98.49 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.66-3.45-1.76.00.00.00.00.00 688.66.00 82.59 93.38 84.08 7011900)7021900)7021900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7061900)7251900)7061900)-.18-1.37-.76-.61.00.00.00.00.00 689.29.00 89.12 99.80 90.25-1.26421E+01

-9.80903E+01

-5.42381E+01

-4.38522E+01 0.OOOOOE+00 0.00000E+00 0.OOOOOE+00 0.00000E+00 0.00000E+00 4.92186E+04 0.00000E+00 6.36379E+03 7.12633E+03 6.44461E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)96.0 94.4 126.0 105.3 97.7 95.7 88.9 99.3 90.1 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B111 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 Page : 1 Date : 03/03/2000 Time : 14:20:11.83 Case 0600: LaSalle UES (Updated Worst 36-Day Temp; Ti=100.0F 00000; power uprat 1 2 3 4 5 070100 1 1 690.82.99 81.35 79.75 78.15 29.70 22.22 0 100.0 R/I S/I 080500 20 0.2 690.423 .5 341.4 260.8 181.9 102.2 60.0 1 5500.1.74.69 73.21 71.78 70.34 26.73 20.00 0 6 381.2 307.2 234.7 163.7 92.0 54.0 7 1 8 999 FPLANT TPRISE 35.26 28.79 16 .68 16.28 15.32 14 .97 14 .53 14.29 13 .88 13.45 13.30 13.30 13.30 13 .24 12 .73 12.73 12.57 12.43 12.24 12.02 12 .02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 95.5 86.0 PROJECT NO. 11333-297 ATTACHMENT B PAGE Bl12 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page: 2 Date : 03/03/2000 Time 14:20:11.83 11.07 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10 .50 10 .50 10.50 10.50 10 .50 10 .SO 10.50 10.50 10 .50 10.50 10 .27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9. 70 9.70 9.70 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE Bl13 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 3 Date 03/03/2000 Time : 14:20:11.89 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B114 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date : 03/03/2000 Time : 14:20:11.89 9.19 9.19 9.19 9 .15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8 .85 8.85 8.85 8 .85 8 .85 8 .72 8 .70 8 .70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8 .70 8 .70 8 .70 8 .70 8 .70 8 .70 8.70 8 .70 8.70 8 .70 8 .70 8 .70 8.70 R -2 PROJECT NO. 11333-297 ATTACHMENT B PAGE Bl15 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 5 Date 03/03/2000 Time 14:20:11.89 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number :03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE Bl16 OF B358 REVISION NO. 8 Page : 6 Date : 03/03/2000 Time : 14:20:12.00 8.49 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 0a PROJECT NO. 11333-297 ATTACHMENT B PAGE Bl17 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.00 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 7 Date : 03/03/2000 Time : 14:20:12.05 PROJECT NO. 11333-297 ATTACHMENT B PAGE B118 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 8 Date : 03/03/2000 Time : 14:20:12.44 Case 0600: LaSalle UHS (Updated Worst 36-Day Temp; Ti: RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : I CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFI 690.000 82.990 423.500 689.000 81.350 341.400 688.000 79.750 260.800 687.000 78.150 181.900 686.000 29.700 102.200 685.000 22.220 60.000 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 100.00 95 WEATHER STATION ID 0.-100.OF @0000; power uprat 5500.00 F AREA 74.690 73.210 71.780 70.340 26.730 20.000 EFF VOLUME 381.200 307.200 234.700 163.700 92.000 54.000.50 PROJECT NO. 11333-297 ATTACHMENT B PAGE B119 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 9 Date : 03/03/2000 Time : 14:20:12.44 Case 0600: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF 00000; power uprat FPLANT 70100 -80500 TPRISE 70100 -80500 R/ I s/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9. 990 9. 990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8,850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9 .190 9 .190 9.190 9.190 9 .190 9.190 9.190 9.190 9.190 9.190 9 .190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B120 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8 .520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B121 OF B358 Program : LAKET-PC Page 10 Number : 03.7.292-1.0 0 Date 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time 14:20:12.60 Case 0600: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@0000; power uprat SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP (CFS) .00 -1.38 -1.25 -1.36 NATURAL EVAP (CFS) .00 -.76 -.70 -.75 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.75 92.74 89.31 LAKE INLET TEMP (F) .00 99.59 101.78 99.89 LAKE OUTLET TEMP (F) .00 89.82 93.59 90.35------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.5 95.5 89.0 LAKE INLET TEMP (F) 125.0 109.0 99.3 LAKE OUTLET TEMP (F) 98.8 96.7 90.1 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B122 OF B358 Program : LAKET-PC Page : 11 Number 03.7.292-1.0 0 Date 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 14:20:12.60 Case 0600: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@0000; power uprat CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP (CFS) .00 -1.38 -1.25 -1.36 NATURAL EVAP (CFS) .00 -.76 -.70 -.75 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.75 92.74 89.31 LAKE INLET TEMP (F) .00 99.59 101.78 99.89 LAKE OUTLET TEMP (F) .00 89.82 93.59 90.35------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.5 95.5 89.0 LAKE INLET TEMP (F) 125.0 109.0 99.3 LAKE OUTLET TEMP (F) 98.8 96.7 90.1 PROJECT NO. 11333-297 ATTACHMENT B PAGE B123 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number: 03.7.292-1.0 0 Created Mon Oct 27 08;45:58 1997 REVISION NO. 8 Page 12 Date 03/03/2000 Time : 14:20:12.60 Case 0600: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@0000; power uprat TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE )VALUE ( DATE ) VALUE (ACRE-FEET)

LAKE SEEPAGE (CFS) -.15 8051900)TOTAL EVAP (CFS) -.22 8041900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) -.22 8041900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)SLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 97.81 7011900)LAKE INLET TEMP (F) 133.63 7011900)LAKE OUTLET TEMP (F) 99.40 7011900)TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%......................................................

-.20-4.45-3.49-1.65.00.00.00.00.00 688.66.00 82.19 92.93 83.36 7011900)7031900)7031900)7021900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7071900)7261900)7071900)-.17-1.36-.75-.62.00.00.00.00.00 689.28.00 89.31 99.89 90.35-1.24523E+01

-9.73128E+01

-5.33378E+01

-4.39751E+01 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 O.O0000E+00 0.OOOOOE+00 4.92178E+04 0.OOOOOE+00 6.37696E+03 7.13288E+03 6.45117E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.5 125.0 98.8 95.5 109.0 96.7 89.0 99.3 90.1 PROJECT NO. 11333-297 ATTACHMENT B PAGE B124 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 1 Date : 03/03/2000 Time : 14:36:07.37 Case 0603: LaSalle UHS (Updated Worst 36-Day Temp; Ti=99.2F @0300; power uprate 1 2 3 4 5 070100 1 1 690.82.99 81.35 79.75 78.15 29.70 22.22 0 99.2 R/I S/I 080500 20 0.2 690.423.5 341.4 260.8 181.9 102.2 60.0 1 1 5500.I.74.69 73.21 71.78 70.34 26.73 20.00 0 6 381.2 307.2 234.7 163.7 92.0 54.0 7 1 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 1S.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 94.7 86.0 PROJECT NO. 11333-297 ATTACHMENT B PAGE B125 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date : 03/03/2000 Time 14:36:07.43 11.07 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B126 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 3 Date 03/03/2000 Time : 14:36:07.43 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B127 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date 03/03/2000 Time 14:36:07.43 9.19 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8. 70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 R .;2 PROJECT NO. 11333-297 ATTACHMENT B PAGE B128 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 5 Date 03/03/2000 Time 14:36:07.43 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B129 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 6 Date : 03/03/2000 Time 14:36:07.48 8.49 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8 .22 8 .22 8 .22 8 .22 8.22 8.22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B130 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 7 Date 03/03/2000 Time : 14:36:07.54 END PROJECT NO. 11333-297 ATTACHMENT B PAGE B131 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 Case 0603: LaSalle UHS (Updated Worst 36-Day T RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION ;1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT DENSITY: 62.40 SEEPAGE: .20 LAKE INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME 690.000 82.990 423.500 689.000 81.350 341.400 688.000 79.750 260.800 687.000 78.150 181.900 686.000 29.700 102.200 685.000 22.220 60.000 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 99.20 WEATHER STATION ID 0.REVISION NO. 8 Page: B Date : 03/03/2000 Time : 14:36:07.81 emp; Ti=99.2F @0300; power uprate 20.00 LENGTH: 5500.00 EFF AREA 74.690 73.210 71.780 70.340 26.730 20.000 EFF VOLUME 381.200 307.200 234.700 163.700 92.000 54.000 94 .70 PROJECT NO. 11333-297 ATTACHMENT B PAGE B132 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Moz Oct 27 08:45:58 1997 REVISION NO. 8 Page : 9 Date 03/03/2000 Time : 14:36:07.81 Case 0603: LaSalle UHS (Updated Worst 36-Day Temp; Ti=99.2F @0300; power uprate FPI.ANT 70100 -80500 R/I 86.000 TPRISE 70100 -80500 S/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10 .500 10 .500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B133 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B134 OF B358 Program LAKET-PC Page : 10 Number 03.7.292-1.0 0 Date 03/03/2000 Created :Mon Oct 27 08:45:58 1997 Time 14:36:07.98 Case 0603: LaSalle UHS (Updated Worst 36-Day Temp; Ti=99.2F 00300; power uprate SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP (CFS) .00 -1.38 -1.27 -1.36 NATURAL EVAP (CFS) .00 -.75 -.72 -.75 FORCED EVAP (CFS) .00 -.63 -.56 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.73 92.77 89.29 LAKE INLET TEMP (F) .00 99.58 101.81 99.89 LAKE OUTLET TEMP (F) .00 89.82 93.62 90.35------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.3 95.5 89.0 LAKE INLET TEMP (F) 125.0 109.0 99.3 LAKE OUTLET TEMP (F) 99.0 96.7 90.1 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B135 OF B358 Program : LAKET-PC Page : 11 Number : 03.7.292-1.0 0 Date 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time : 14:36:07.98 Case 0603: LaSalle UHS (Updated Worst 36-Day Temp; Ti=99.2F @0300; power uprate CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP (CFS) .00 -1.38 -1.27 -1.36 NATURAL EVAP (CFS) .00 -.75 -.72 -.75 FORCED EVAP (CFS) .00 -.63 -.56 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DZSSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.73 92.77 89.29 LAKE INLET TEMP (F) .00 99.58 101.81 99.89 LAKE OUTLET TEMP (F) .00 89.82 93.62 90.35 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.3 95.5 89.0 LAKE INLET TEMP (F) 125.0 109.0 99.3 LAKE OUTLET TEMP (F) 99.0 96.7 90.1 PROJECT NO. 11333-297 ATTACHMENT B PAGE B136 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 12 Date 03/03/2000 Time : 14:36:07.98 Case 0603: LaSalle UHS (Updated Worst 36-Day Temp; Ti=99.2F @0300; power uprate TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE )VALUE ( DATE )VALUE (ACRE-FEET)

---

LAKE SEEPAGE (CFS)TOTAL EVAP (CFS)NATURAL EVAP (CFS)FORCED EVAP (CFS)PRECIPITATION (CFS)MAKEUP (CFS)BLOWDOWN (CFS)RUNOFF (CFS)DAM SPILL (CFS)LAKE ELEVATION (FEET)DISSOLVED SOLIDS (PPM)NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)-.15-.22.00-.22.00.00.00.00.00 690.00.00 97.76 133.12 99.96 8051900)8041900)7011900)8041900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)-.20-4.47-3.48-1.67.00.00.00.00.00 688.66.00 82.20 92.94 83.73 7011900)7031900)7031900)7021900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7071900)7261900)7071900)-.17-1.36-.75-.62.00.00.00.00.00 689.28.00 89.29 99.89 90.35-1.24511E+01

-9.73689E+01

-5.33954E+01

-4.39735E+01 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 4.92178E+04 0.OOOOOE+00 6.37599E+03 7.13237E+03 6.45128E+03 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%..........................NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.3 95.5 125.0 109.0 99.0 96.7 89.0 99.3 90.1 PROJECT NO. 11333-297 ATTACHMENT B PAGE B137 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 1 Date 03/03/2000 Time : 14:59:24.73 Case 0606: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.9F @0600; power uprate 1 2 070100 080500 1 1 3 1 20 4 1 0.2 5500. 0 5 690. 690. 1. 6 82.99 81.35 79.75 78.15 29.70 22.22 0 97.9 423.5 341.4 260.8 181.9 102.2 60.0 74.69 73.21 71.78 70.34 26.73 20.00 381.2 307.2 234.7 163.7 92.0 54.0 7 1 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14 .97 14 .53 14.29 13 .88 13 .45 13.30 13 .30 13 .30 13 .24 12.73 12.73 12.57 12 .43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 93.4 86.0 R/I S/I PROJECT NO. 11333-297 ATTACHMENT B PAGE B138 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date 03/03/2000 Time 14:59:24.73 11.07 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B139 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 3 Date : 03/03/2000 Time 14:59:24.73 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B140 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date 03/03/2000 Time : 14:59:24.73 9.19 9.19 9.19 9.1S 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8 .70 8.70 8.70 8.52 PROJECT NO. 11333-297 ATTACHMENT B PAGE B141 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page: 5 Date : 03/03/2000 Time : 14:59:24.79 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B142 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 6 Date : 03/03/2000 Time : 14:59:24.84 8.49 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B143 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 7 Date 03/03/2000 Time 14:59:24.95 END PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7,292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B144 OF B358 REVISION NO. 8 Page : 8 Date 03/03/2000 Time : 14:59:25.23 Case 0606: LaSalle UHS (Updated Worst 36-Day Temp; Ti=RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF 690.000 82.990 423.500 689.000 81.350 341.400 688.000 79.750 260.800 687.000 78.150 181.900 686.000 29.700 102.200 2 685.000 22.220 60.000 2 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 97.90 93.WEATHER STATION ID 0.=97.9F @0600; power uprate 5500.00 AREA 4.690 73.210 71.780'0.340 6.730 0.000 EFF VOLUME 381.200 307.200 234.700 163.700 92.000 54.000 40 PROJECT NO. 11333-297 CALCULATION NO. L-002457 ATTACHMENT B PAGE B145 OF B358 REVISION NO. 8 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 9 Date 03/03/2000 Time 14:59:25.23 Case 0606: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.9F @0600; power uprate FPLANT 70100 -80500 R/I 86.000 TPRISE 70100 -80500 S/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9 .540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9 .190 9.190 9.190 9.190 9.190 8 .850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B146 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8 .490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B147 OF B358 Program : LAKET-PC Page :10 Number 03.7.292-1.0 0 Date 03/03/2000 Created :Mon Oct 27 08:45:58 1997 Time 14:59:25.39 Case 0606: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.9F @0600; power uprate SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP (CFS) .00 -1.38 -1.29 -1.37 NATURAL EVAP (CFS) .00 -.75 -.74 -.75 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.66 92.78 89.23 LAKE INLET TEMP (F) .00 99.51 101.81 99.83 LAKE OUTLET TEMP (F) .00 89.75 93.62 90.29------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.8 95.3 89.0 LAKE INLET TEMP (F) 126.0 108.0 99.3 LAKE OUTLET TEMP (F) 99.0 96.5 90.1 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B148 OF B358 Program : LAKET-PC Page 11 Number 03.7.292-1.0 0 Date 03/03/2000 Created :Mon Oct 27 08:45:58 1997 Time 14:59:25.39 Case 0606: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.9F @0600; power uprate CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP. (CFS) .00 -1.38 -1.29 -1.37 NATURAL EVAP (CFS) .00 -.75 -.74 -.75 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.75 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.66 92.78 89.23 LAKE INLET TEMP (F) .00 99.51 101.81 99.83 LAKE OUTLET TEMP (F) .00 89.75 93.62 90.29------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.8 95.3 89.0 LAKE INLET TEMP (F) 126.0 108.0 99.3 LAKE OUTLET TEMP (F) 99.0 96.5 90.1 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B149 OF B358 Page : 12 Date 03/03/2000 Time : 14:59:25.39 Case 0606: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.9F @0600; power uprate TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

........................ ...................-- ---------------------------LAKE SEEPAGE (CFS)TOTAL EVAP (CFS)NATURAL EVAP (CFS)FORCED EVAP (CFS)PRECIPITATION (CFS)MAKEUP (CFS)BLOWDOWN (CFS)RUNOFF (CFS)DAM SPILL (CFS)LAKE ELEVATION (FEET)DISSOLVED SOLIDS (PPM)NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)-.15-.22.00-.22.00.00.00.00.00 690.00.00 97.06 132.08 99.98 8051900)8041900)7011900)8041900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)-.20-4.46-3.44-1.65.00.00.00.00.00 688.65.00 82 .15 92 .96 83 .38 7011900)7031900)7031900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7071900)7261900)7071900)-.17-1.37-.75-.62.00.00.00.00.00 689.28.00 89.23 99.83 90.29-1.24532E+01

-9.74773E+01

-5.35152E+01

-4.39622E+01 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 4.92179E+04 0.OOOOOE+00 6.37134E+03 7.12853E+03 6.44715E+03 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)96.8 126.0 99.0 95.3 108.0 96.5 89.0 99.3 90.1 PROJECT NO. 11333-297 ATTACHMENT B PAGE B150 OF B358 CALCULATION NO. L-002457 Program :AKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 1 Date : 03/06/2000 Time : 10:28:47.11 Case 0609: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.SF @0900; power up 1 2 070100 080500 1 1 3 1 20 4 1 0.2 5500. 0 5 690. 690. 1. 6 82.99 81.35 79.75 78.15 29.70 22.22 0 97.5 R/I S/I 423.5 341.4 260.8 181.9 102.2 60.0 74.69 73.21 71.78 70.34 26.73 20.00 381.2 307.2 234.7 163.7 92.0 54.0 7 1 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 93.0 86.0 PROJECT NO. 11333-297 ATTACHMENT B PAGE B151 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date 03/06/2000 Time 10:28:47.11 11.07 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B152 OF B358 CALCULATION NO. L-002457 Program :LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 3 Date : 03/06/2000 Time : 10:28:47.16 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B153 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date : 03/06/2000 Time 10:28:47.16 9.19 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.8S 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B154 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 5 Date 03/06/2000 Time 10:28:47.16 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B155 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 6 Date : 03/06/2000 Time 10:28:47.22 8.49 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B156 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 7 Date : 03/06/2000 Time : 10:28:47.33 END PROJECT NO. 11333-297 ATTACHMENT B PAGE B157 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 8 Date : 03/06/2000 Time : 10:28:47.71 Case 0609: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.5F 00900; power up RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE:.20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

=690.00 DRAWDOWN CURVE ELEVATION 690.000 689.000 688.000 687.000 686.000 685.000 PLOT FILE FREQ TOTAL AREA 82.990 81.350 79.750 78.150 29.700 22.220 1 INCREMENTS A]TOTAL VOLUME 423.500 341.400 260.800 181.900 102.200 60.000 0 HOURS EFF AREA 74.690 73.210 71.780 70.340 26.730 20,000 EFF VOLUME 381.200 307.200 234.700 163.700 92.000 54.000 INITIAL FORCED/NATURAL LAKE TEMPS. =97.50 93.00 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B158 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Case 0609: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.5F @0900; power up Page : 9 Date : 03/06/2000 Time : 10:28:47.71 FPLANT 70100 -80500 TPRISE 70100 -80500 R/I s/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9 .190 9.190 9.190 9.190 9.190 9.190 9. 190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 16.680 14.970 14.530 13.450 13.300 13.240 12.730 12.430 12.240 12.020 12.020 11.490 11.490 11.490 11.490 11.070 11.070 10.870 10.860 10.500 10.500 10.500 10.500 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.720 9.700 9.700 9.540 9.540 9.540 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8 .850 8.850 8.850 8.850 8.850 8 .850 8.850 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 ATTACHMENT B PAGE B159 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B160 OF B358 Program LAKET-PC Page : 10 Number 03.7.292-1.0 0 Date : 03/06/2000 Created Mon Oct 27 08:45:58 1997 Time 10:28:47.99 Case 0609: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.5F @0900; power up SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.15 -.17 TOTAL EVAP (CFS) .00 -1.62 -1.32 -1.58 NATURAL EVAP (CFS) .00 -.97 -.77 -.94 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWW (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.57 689.19 DISSOLVE3D SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.79 89.62 90.63 LAKE INLET TEMP (F) .00 101.45 98.76 101.08 LAKE OUTLET TEMP (F) .00 91.70 90.58 91.55 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.9 90.9 LAKE INLET TEMP (F) 128.0 109.4 100.9 LAKE OUTLET TEMP (F) 99.0 97.1 91.9 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B161 OF B358 Program LAKET-PC Page : 1i Number : 03.7.292-1.0 0 Date 03/06/2000 Created Mon Oct 27 08:45:58 1997 Time : 10:28:48.04 Case 0609: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.SF @0900; power up CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.15 -.17 TOTAL EVAP (CFS) .00 -1.62 -1.32 -1.58 NATURAL EVAP (CFS) .00 -.97 -.77 -.94 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.57 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.79 89.62 90.63 LAKE INLET TEMP (F) .00 101.45 98.76 101.08 LAKE OUTLET TEMP (F) .00 91.70 90.58 91.5S TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.9 90.9 LAKE INLET TEMP (F) 128.0 109.4 100.9 LAKE OUTLET TEMP (F) 99.0 97.1 91.9 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B162 OF B358 Page 12 Date 03/06/2000 Time 10:28:48.04 Case 0609: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.5F @0900; power up TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

....................................................................................................

LAKE SEEPAGE (CFS)TOTAL EVAP (CFS)NATURAL EVAP (CFS)FORCED EVAP (CFS)PRECIPITATION (CFS)MAKEUP (CFS)BLOWDOWN (CFS)RUNOFF (CFS)DAM SPILL (CFS)LAKE ELEVATION (FEET)DISSOLVED SOLIDS (PPM)NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)----------------------

TEMPERATURE

---

NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)-.15-.32.00-.26.00.00.00.00.00 689.99.00 97.72 132.95 99.98 8051900)8051900)7031900)7311900i 7011900)7011900)7011900)7011900)7011900)7011900)7011900)7041900)7011900)7011900)-.20-4.06-2.67-1.53.00.00.00.00.00 688.47.00 81.74 90.99 82.50 7011900)7051900)7051900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7241900)7241900)7241900)-.17-1.58-.94-.63.00.00.00.00.00 689.19.00 90.63 101.08 91.55-1.22325E+01

-1.12591E+02

-6.74198E+01

-4.51712E+01 0.00000E+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 4.92117E+04 0.OOOOOE+00 6.47137E+03 7.21761E+03 6.53681E+03 FREQUENCY OF OCCURENCES 1% 5% 50%97.0 128.0 99.0 95.9 109.4 97.1 90.9 100.9 91.9 PROJECT NO. 11333-297 CALCULATION NO. L-002457 ATTACHMENT B PAGE B163 OF B358 REVISION NO. 8 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 1 Date 03/06/2000 Time : 11:24:37.23 Case 0612: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=98.34F

@1200; power u 1 2 070100 080500 1 1 3 1 20 4 1 0.2 5500. 0 5 690. 690. 1. 6 82.99 81.35 79.75 78.15 29.70 22.22 0 98.3 R/I s/I 423.5 341.4 260.8 181.9 102.2 60.0 74.69 73.21 71.78 70.34 26.73 20.00 381.2 307.2 234.7 163.7 92.0 54.0 7 1 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14 .53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 93.8 86.0 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B164 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 2 Date : 03/06/2000 Time 11:24:37.23 11.07 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B165 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 3 Date : 03/06/2000 Time 11:24:37.23 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B166 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 4 Date : 03/06/2000 Time : 11:24:37.23 9.19 9.19 9.19 9 .15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8 .72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 PROJECT NO. 11333-297 ATTACHMENT B PAGE B167 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 5 Date 03/06/2000 Time 11:24:37.29 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B168 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 6 Date 03/06/2000 Time 11:24:37.34 8.49 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B169 OF B358 CALCULATION NO. L-002457 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 7 Date 03/06/2000 Time 11:24:37.45 END PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B170 OF B358 Page 8 Date 03/06/2000 Time 11:24:37.73 Case 0612: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=98.34F

@1200; power u RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE:.20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

=690.00 DRAWDOWN CURVE ELEVATION 690.000 689.000 688.000 687.000 686.000 685.000 PLOT FILE FREQ TOTAL AREA 82 .990 81.350 79.750 78.150 29.700 22,220 1 INCREMENTS A!TOTAL VOLUME 423.500 341.400 260.800 181.900 102.200 60.000 r 0 HOURS EFF AREA 74.690 73.210 71.780 70.340 26.730 20.000 EFF VOLUME 381.200 307.200 234.700 163.700 92.000 54.000 INITIAL FORCED/NATURAL LAKE TEMPS. =98.30 93.80 WEATHER STATION ID 0 PROJECT NO. 11333-297 ATTACHMENT B PAGE B171 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 9 Date : 03/06/2000 Time 11:24:37.73 Case 0612: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=98.34F

@1200; power u FPLANT 70100 -80500 R/I TPRISE 70100 -80500 S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8 .700 28.790 16.680 14.970 14.530 13.450 13.300 13.240 12.730 12.430 12.240 12.020 12.020 11.490 11.490 11.490 11.490 11.070 11.070 10.870 10.860 10.500 10.500 10.500 10.500 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.720 9.700 9.700 9.540 9.540 9.540 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 ATTACHMENT B PAGE B172 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8 .490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8 ,220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B173 OF B358 Program LAKET-PC Page : 10 Number 03.7.292-1.0 0 Date 03/06/2000 Created Mon Oct 27 08:45:58 1997 Time 11:24:37.89 Case 0612: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=98.34F 01200; power u SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.15 -.17 TOTAL EVAP (CFS) .00 -1.62 -1.32 -1.58 NATURAL EVAP (CFS) .00 -.98 -.77 -.95 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.56 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.82 89.62 90.65 LAKE INLET TEMP (F) .00 101.47 98.76 101.10 LAKE OUTLET TEMP (F) .00 91.72 90.58 91.56 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.8 90.9 LAKE INLET TEMP (F) 128.0 109.5 100.9 LAKE OUTLET TEMP (F) 99.3 96.9 91.9 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B174 OF B358 Program : LAKET-PC Page : 11 Number 03.7.292-1.0 0 Date 03/06/2000 Created Mon Oct 27 08:45:58 1997 Time 11:24:37.89 Case 0612: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=98.34F 01200; power u CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.15 -.17 TOTAL EVAP (CFS) .00 -1.62 -1.32 -1.58 NATURAL EVAP (CFS) .00 -.98 -.77 -.95 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.56 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.82 89.62 90.65 LAKE INLET TEMP (F) .00 101.47 98.76 101.10 LAKE OUTLET TEMP (F) .00 91.72 90.58 91.56------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.8 90.9 LAKE INLET TEMP (F) 128.0 109.5 100.9 LAKE OUTLET TEMP (F) 99.3 96.9 91.9 PROJECT NO. 11333-297 ATTACHMENT B PAGE B175 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 12 Date 03/06/2000 Time 11:24:37.89 Case 0612: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=98.34F

@1200; power u TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

LAKE SEEPAGE (CPS) -.15 8051900)TOTAL EVAP (CFS) -.32 8051900)NATURAL EVAP (CFS) .00 7031900)FORCED EVAP (CFS) -.26 7311900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 97.70 7041900)LAKE INLET TEMP (F) 134.74 7011900)LAKE OUTLET TEMP (F) 99.96 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-3.97-2.66-1.55.00.00.00.00.00 688.47.00 81.73 90.99 82.50 7011900)7051900)7051900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7241900)7241900)7241900)-.17-1.58-.95-.63.00.00.00.00.00 689.19.00 90.65 101.10 91.56-1.22264E+01

-1.12836E+02

-6.76335E+01

-4.52026E+01 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.00000E+00 4.92116E+04 0.OOOOOE+00 6.47304E+03 7.21878E+03 6.53794E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 128.0 99.3 95.8 109.5 96.9 90.9 100.9 91.9 PROJECT NO. 11333-297 ATTACHMENT B PAGE B176 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 1 Date : 03/06/2000 Time : 13:05:14.75 Case 0615: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.SF @1500; power up 1 2 070100 080500 1 1 3 1 20 4 1 0.2 5500. 0 5 690. 690. 1. 6 82.99 81.35 79.75 78.15 29.70 22.22 0 99.5 R/I s/I 423.5 341.4 260.8 181.9 102.2 60.0 74.69 73.21 71.78 70.34 26.73 20.00 381.2 307.2 234.7 163.7 92.0 54.0 7 1 8 999 FPLANT TPRISE 35.26 28.79 16 .68 16 .28 15.32 14,97 14,53 14,29 13.88 13,45 13.30 13,30 13,30 13,24 12,73 12,73 12,57 12,43 12,24 12,02 12,02 12,02 12,02 12,01 11,49 11,49 11,49 11,49 11,49 11,49 11,49 11.49 11.09 95.0 86.0 PROJECT NO. 11333-297 ATTACHMENT B PAGE B177 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date 03/06/2000 Time : 13:05:14.75 11.07 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B178 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 3 Date : 03/06/2000 Time : 13:05:14.75 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9.19 9 .19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B179 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date : 03/06/2000 Time 13:05:14.75 9.19 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B180 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 Page : 5 Date : 03/06/2000 Time : 13:05:14.81 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B181 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 6 Date : 03/06/2000 Time : 13:05:14.86 8.49 8.49 8.44 8.22 8.22 8.22 8 .22 8 .22 8.22 8.22 8.Z2 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.2 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program :LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 21 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B182 OF B358 Page : 7 Date : 03/06/2000 Time : 13:05:14.97 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B183 OF B358 Program : LAKET-PC Page 8 Number : 03.7.292-1.0 0 Date : 03/06/2000 Created : Mon Oct 27 08:45:58 1997 Time : 13:05:15.36 Case 0615: LaSalle DUS (Updated Worst 5/1/30-Day Temp; Ti=99.5F @1500; power up RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 82.990 423.500 74.690 381.200 689.000 81.350 341.400 73.210 307.200 688.000 79.750 260.800 71.780 234.700 687.000 78.150 181.900 70.340 163.700 686.000 29.700 102.200 26.730 92.000 685.000 22.220 60.000 20.000 54.000 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. 99.50 95.00 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B184 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 9 Date : 03/06/2000 Time : 13:05:15.36 Case 0615: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.5F @1500; power up FPLANT 70100 -TPRISE 70100 -80500 R/I 80500 s/i 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 16.680 14.970 14.530 13.450 13.300 13.240 12.730 12.430 12.240 12.020 12.020 11.490 11.490 11.490 11.490 11.070 11.070 10.870 10.860 10.500 10.500 10.500 10.500 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.720 9.-700 9.700 9.540 9.540 9.540 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 ATTACHMENT B PAGE B185 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8,490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B186 OF B358 Program LAKET-PC Page 10 Number 03.7.292-1.0 0 Date 03/06/2000 Created Mon Oct 27 08:45:S8 1997 Time 13:05:15.52 Case 0615: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.5F @1500; power up SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.17 -.15 -.17 TOTAL EVAP (CPS) .00 -1.63 -1.32 -1.59 NATURAL EVAP (CFS) .00 -.98 -.77 -.95 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.56 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.79 89.62 90.62 LAKE INLET TEMP (F) .00 101.43 98.77 101.06 LAKE OUTLET TEMP (F) .00 91.67 90.59 91.52 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.8 90.9 LAKE INLET TEMP (F) 127.0 109.0 100.9 LAKE OUTLET TEMP (F) 98.8 96.8 91.9 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE 8187 OF B358 Program LAKET-PC Page 11 Number 03.7.292-1.0 0 Date 03/06/2000 Created Mon Oct 27 08:45:58 1997 Time : 13:08:15.52 Case 0615: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.SF 01500; power up CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CPS) .00 -.17 -.15 -.17 TOTAL EVAP (CPS) .00 -1.63 -1.32 -1.59 NATURAL EVAP (CPS) .00 -.98 -.77 -.95 FORCED EVAP (CFS) .00 -.65 -.55 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CPS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.56 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.79 89.62 90.62 LAKE INLET TEMP (F) .00 101.43 98.77 101.06 LAKE OUTLET TEMP (F) .00 91.67 90.59 91.52 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.8 90.9 LAKE INLET TEMP (F) 127.0 109.0 100.9 LAKE OUTLET TEMP (F) 98.8 96.8 91.9 PROJECT NO. 11333-297 ATTACHMENT B PAGE B188 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 12 Date : 03/06/2000 Time 13:05:15.52 Case 0615: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.5F @1500; power up TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE VALUE ( DATE ) VALUE (ACRE-FEET)

LAKE SEEPAGE (CFS) -.15 8051900)TOTAL EVAP (CFS) -.32 8051900)NATURAL EVAP (CFS) .00 7031900)FORCED EVAP (CFS) -.26 7311900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 97.57 7041900)LAKE INLET TEMP (F) 135.23 7011900)LAKE OUTLET TEMP (F) 99.97 7011900)-------------------------------------------..---------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.00-3.20-1.59.00.00.00.00.00 688.46.00 81.73 91.15 82.66 7011900)7051900)7051900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7241900)7241900)7241900)-.17-1.59-.95-63.00.00.00.00.00 689.19.00 90.62 101.06 91.52-1.22170E+01

-1.13212E+02

-6. 80232E+01-4 .51890E+01 0 OOOOOE+00 0 OOOOOE+00 0 OOOOOE+00 0 OOOOOE+00 0 OOOOOE+00 4. 92113E+04 0 OOOOOE+00 6.47104E+03 7.21610E+03 6.53520E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 95.8 90.9 127.0 109.0 100.9 98.8 96.8 91.9 PROJECT NO. 11333-297 ATTACHMENT B PAGE B189 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 1 Date 03/03/2000 Time 16:34:23.31 Case 0618: LaSalle UHS (Updated Worst 36-Day Tamp; Ti=100.0F

@1800; power uprat 1 2 3 4 5 070100 1 1 690, 82.99 81.35 79.75 78.15 29.70 22.22 0 100 .0 R/I S/I 080500 20 0.2 690.423.5 341.4 260.8 181.9 102.2 60.0 1 1 5500.1.74.69 73.21 71.78 70.34 26.73 20.00 0 6 381.2 307.2 234.7 163.7 92.0 54.0 7 1 8 999 PPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 95.5 86.0 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B190 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 2 Date 03/03/2000 Time : 16:34:23.36 11.07 11.07 11.07 11.07 10 .87 10.86 10.86 10.50 10. 50 10.50 10.50 10 .50 10.50 10 .50 10 .50 10.50 10 .50 10.50 10 .50 10 .50 10 .50 10 .50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B191 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 3 Date : 03/03/2000 Time 16:34:23.36 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B192 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date 03/03/2000 Time : 16:34:23.36 9.19 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B193 OF B358 Page : 5 Date : 03/03/2000 Time : 16:34:23.42 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B194 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page : 6 Date : 03/03/2000 Time : 16:34:23.47 8.49 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B195 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 7 Date 03/03/2000 Time 16:34:23.58 END PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B196 OF B358 REVISION NO. 8 Page : 8 Date : 03/03/2000 Time : 16:34:23.97 Case 0618: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@1800; power uprat RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE:.20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

=690.00 DRAWDOWN CURVE ELEVATION 690.000 689.000 688.000 687.000 686.000 685.000 PLOT FILE FREQ TOTAL AREA 82.990 81.350 79.750 78.150 29.700 22.220 1 INCREMENTS TOTAL VOLUME 423,500 341.400 260.800 181.900 102.200 60.000 AT 0 HOURS EFF AREA 74.690 73.210 71.780 70.340 26.730 20.000 EFF VOLUME 381.200 307.200 234.700 163.700 92.000 54.000 INITIAL FORCED/NATURAL LAKE TEMPS. =100.00 95.50 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B197 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 9 Date 03/03/2000 Time : 16:34:23.97 Case 0618: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@1800; power uprat FPLANT 70100 -80500 TPRISE 70100 -80500 s/I S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9. 540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 16.680 14.970 14.530 13.450 13.300 13,240 12.730 12.430 12.240 12.020 12.020 11.490 11.490 11.490 11.490 11.070 11.070 10.870 10.860 10.500 10.500 10.500 10.500 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.990 9.720 9.700 9.700 9.540 9.540 9 .540 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9 .990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 ATTACHMENT B PAGE B198 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8 .700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8 .220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8 .700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B199 OF B358 Program LAKET-PC Page : 10 Number : 03.7.292-1.0 0 Date 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time 16:34:24.13 Case 0618: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@1800; power uprat SEASONAL SUIMMARY FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP (CFS) .00 -1.37 -1.33 -1.36 NATURAL EVAP (CFS) .00 -.74 -.79 -.75 FORCED EVAP (CFS) .00 -.62 -.55 -.61 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CPS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.37 688.76 689.29 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.48 92.68 89.07 LAKE INLET TEMP (F) .00 99.36 101.66 99.68 LAKE OUTLET TEMP (F) .00 89.60 93.49 90.14----------------------------------------------------..

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.3 94.6 88.9 LAKE INLET TEMP (F) 125.0 105.6 99.3 LAKE OUTLET TEMP (F) 97.7 95.7 90.1 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B200 OF B358 Program LAKET-PC Page : 11 Number : 03.7.292-1.0 0 Date 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 16:34:24.13 Case 0618: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@1800; power uprat CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP (CFS) .00 -1.37 -1.33 -1.36 NATURAL EVAP (CFS) .00 -.74 -.79 -.75 FORCED EVAP (CFS) .00 -.62 -.55 -.61 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.37 688.76 689.29 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.48 92.68 89.07 LAKE INLET TEMP (F) .00 99.36 101.66 99.68 LAKE OUTLET TEMP (F) .00 89.60 93.49 90.14 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.3 94.6 88.9 LAK INLET TEMP (F) 125.0 105.6 99.3 LAKE OUTLET TEMP (F) 97.7 95.7 90.1 PROJECT NO. 11333-297 ATTACHMENT B PAGE B201 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 12 Date 03/03/2000 Time 16:34:24.13 Case 0618: LaSalle UHS (Updated Worst 36-Day Temp; Ti=l00.OF

@1800; power uprat TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE VALUE ( DATE ) VALUE (ACRE-FEET)

.......................................- ------------------------------LAKE SEEPAGE (CFS) -.15 8051900)TOTAL EVAP (CFS) .22 8031900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) -.22 8031900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 96.90 8031900)LAKE INLET TEMP (F) 133.82 7011900)LAKE OUTLET TEMP (F) 98.56 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.54-3.35-1.77.00.00.00.00.00 688.66.00 82.07 93.08 83.55 7011900)7021900)7021900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7061900)7251900)7061900)-.17-1.36-.75-.61.00.00.00.00.00 689.29.00 89.07 99.68 90.14-1.24752E+01

-9.72176E+01

-5. 34099E+01-4 .38076E+01 0 OOOOOE+00 0 .OOOOOE+00 0 OOOOOE+00 0 OOOOOE+00 0 OOOOOE+00 4. 92185E+04 0.00000E+00 6.35974E+03 7.11789E+03 6.43622E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)96.3 94.6 88.9 125.0 105.6 99.3 97.7 95.7 90.1 PROJECT NO. 11333-297 ATTACHMENT B PAGE B202 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 1 Date : 03/03/2000 Time : 16:40:56.46 Case 0621: LaSalle UHS (Updated Worst 36-Day Temp; Ti=I00.OF

@2100; power uprat 1 2 3 4 5 7 1 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 070100 1 1 690.82.99 81.35 79.75 78.15 29.70 22.22 0 100.0 R/I S/I 080500 20 0.2 690.423.5 341.4 260.8 181.9 102.2 60.0 1 5500.1.74.69 73.21 71.78 70.34 26.73 20.00 0 6 381.2 307.2 234.7 163.7 92.0 54.0 95 .5 86.0 PROJECT NO. 11333-297 ATTACHMENT B PAGE B203 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date 03/03/2000 Time 16:40:56.46 11.07 11.07 11.07 11.07 10.87 10.86 10.86 10 .50 10 .50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B204 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 3 Date 03/03/2000 Time : 16:40:56.46 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B205 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page : 4 Date 03/03/2000 Time 16:40:56.46 9.19 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 PROJECT NO. 11333-297 ATTACHMENT B PAGE B206 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:5s 1997 REVISION NO. 8 Page : 5 Date 03/03/2000 Time 16:40:56.52 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8 .49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B207 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 6 Date : 03/03/2000 Time 16:40:56.57 8.49 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B208 OF B358 Page : 7 Date 03/03/2000 Time 16:40:56.68 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B209 OF B358 Program LAKET-PC Page : 8 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created :Mon Oct 27 08:45:58 1997 Time : 16:40:57.07 Case 0621: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@2100; power uprat RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 82.990 423.500 74.690 381.200 689.000 81.350 341.400 73.210 307.200 688.000 79.750 260.800 71.780 234.700 687.000 78.150 181.900 70.340 163.700 686.000 29.700 102.200 26.730 92.000 685.000 22.220 60.000 20.000 54.000 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 100.00 95.50 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B210 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created : Morn Oct 27 08:45:58 1997 REVISION NO. 8 Page : 9 Date 03/03/2000 Time 16:40:57.07 Case 0621: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@2100; power uprat FPLANT 70100 -80500 R/I 86.000 TPRISE 70100 -80500 S/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10 500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9 .540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9 .190 9.190 9.190 9.190 9.190 8.850 8 .850 8 .850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8,850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9 .540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8 .700 8.700 8 .700 8 .700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B211 OF B358 CALCULATION NO. L-002457 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 REVISION NO. 8 8.700 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B212 OF B358 Program : LAKET-PC Page 10 Number 03.7.292-1.0 0 Date 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 16:40:57.23 Case 0621: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@2100; power uprat SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP (CFS) .00 -1.37 -1.36 -1.37 NATURAL EVAP (CFS) .00 -.74 -.81 -.75 FORCED EVAP (CFS) .00 -.62 -.55 -.61 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.37 688.76 689.29 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.51 92.64 89.09 LAKE INLET TEMP (F) .00 99.37 101.59 99.68 LAKE OUTLET TEMP (F) .00 89.61 93.40 90.13------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.5 94.7 88.9 LAKE INLET TEMP (F) 125.0 105.5 99.3 LAKE OUTLET TEMP (F) 97.7 95.8 90.1 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B213 OF B358 Program LAKET-PC Page 11 Number : 03.7.292-1.0 0 Date 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 16:40:57.23 Case 0621: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@2100; power uprat CUMULATIVE SEASONAL SUMM4ARY:

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.18 -.16 -.17 TOTAL EVAP (CFS) .00 -1.37 -1.36 -1.37 NATURAL EVAP (CFS) .00 -.74 -.81 -.75 FORCED EVAP (CFS) .00 -.62 -.55 -.61 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.37 688.76 689.29 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.51 92.64 89.09 LAKE INLET TEMP (F) .00 99.37 101.59 99.68 LAKE OUTLET TEMP (F) .00 89.61 93.40 90.13 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 96.5 94.7 88.9 LAKE INLET TEMP (F) 125.0 105.5 99.3 LAKE OUTLET TEMP (F) 97.7 95.8 90.1 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B214 OF B358 Page : 12 Date 03/03/2000 Time : 16:40:57.23 Case 0621: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@2100; power uprat TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

....................................................................................................

LAKE SEEPAGE (CFS) -.15 8051900)TOTAL EVAP (CFS) -.22 8031900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) -.22 8031900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 96.89 8031900)LAKE INLET TEMP (F) 133.61 7011900)LAKE OUTLET TEMP (F) 98.35 7011900)TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.59-3.39-1.76.00.00.00.00.00 688.65.00 82.12 92.99 83.60 7011900)7021900)7021900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7061900)7251900)7061900)-.17-1.37-.75-.61.00.00.00.00.00 689.29.00 89.09 99.68 90.13-1.24743E+01

-9.74854E+01

-5.36504E+01

-4.38350E+01 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 4.92185E+04 0.OOOOOE+00 6.36119E+03 7.11760E+03 6.43604E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)96.5 94.7 125.0 10s.5 97.7 95.8 88.9 99.3 90.1 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B215 OF B358 REVISION NO. 8 Page : 1 Date : 03/03/2000 Time : 14:22:34.64 Case 1800: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@ 0000; power upra 1 2 3 4 5 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 070100 1 1 690.81.35 79.75 78.15 29.70 22.22 13.42 1 100.0 R/I S/I 080500 20 0.2 690.341.4 260.8 181.9 102.2 60,0 43.8 0 95.5 86.0 1 1 5500.1.73.21 71.78 70.34 26.73 20.00 12.08 0 6 307.2 234.7 163.7 92.0 54.0 39.4 PROJECT NO. 11333-297 ATTACHMENT B PAGE B216 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date 03/03/2000 Time 14:22:34.64 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 ATTACHMENT B REVISION NO. 8 PAGE B217 OF B358 Page : 3 Date : 03/03/2000 Time : 14:22:34.64 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B218 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 4 Date 03/03/2000 Time 14:22:34.64 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B219 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 5 Date : 03/03/2000 Time : 14:22:34.69 8.49 8.49 8.49 8.49 8.49 8.49 8.49.8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B220 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 6 Date 03/03/2000 Time 14:22:34.75 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B221 OF B358 Program : LAKET-PC Page : 7 Number 03.7.292-1.0 0 Date : 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time 14:22:35.19 Case 1800: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@ 0000; power upra RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 81.350 341.400 73.210 307.200 689.000 79.750 260.800 71.780 234.700 688.000 78.150 181.900 70.340 163.700 687.000 29.700 102.200 26.730 92.000 686.000 22.220 60.000 20.000 54.000 685.000 13.420 43.800 12.080 39.400 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS, = 100.00 95.50 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B222 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number :03.7.292-1.00 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 8 Date 03/03/2000 Time 14:22:35.19 Case 1800: LaSalle URS (Updated Worst 36-Day Temp; Ti=100.OF

@ 0000; power upra FPLANT 70100 -TPRISE 70100 -80500 R/I 80500 S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9 .190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8 .850 8 .850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B223 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B224 OF B358 Program LAKET-PC Page 9 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time : 14:22:35.35 Case 1800: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@ 0000; power upra SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.14 -.17 TOTAL EVAP (CFS) .00 -1.36 -1.26 -1.35 NATURAL EVAP (CFS) .00 -.74 -.70 -.73 FORCED EVAP (CFS) .00 -.63 -.56 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 SLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.74 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.61 93.07 89.23 LAKE INLET TEMP (F) .00 99.28 101.79 99.63 LAKE OUTLET TEMP (F) .00 89.54 93.60 90.11 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 98.0 95.9 89.0 LAKE INLET TEMP (F) 125.0 109.3 99.2 LAKE OUTLET TEMP (F) 98.8 96.8 89.9 PROJECT NO. 11333-297 ATTACHMENT B PAGE B225 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 10 Date : 03/03/2000 Time : 14:22:35.35 Case 1800: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@ 0000; power upra CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE.......................................- --------------------LAKE SEEPAGE (CFS) .00 -.17 TOTAL EVAP (CFS) .00 -1.36 NATURAL EVAP (CFS) .00 -.74 FORCED EVAP (CFS) .00 -.63 PRECIPITATION (CFS) .00 .00 MAKEUP (CFS) .00 .00 BLOWDOWN (CFS) .00 .00 RUNOFF (CFS) .00 .00 DAM SPILL (CFS) .00 .00 LAKE ELEVATION (FEET) .00 689.36 DISSOLVED SOLIDS (PPM) .00 .00 NATURAL LAKE TEMP (F) .00 88.61 LAKE INLET TEMP (F) 00 99.28 LAKE OUTLET TEMP (F) .00 89.54------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%------------------------------------------------------

-.14-1.26-.70-.56.00.00.00.00.00 688.74.00 93.07 101.79 93.60-.17-1.35-.73-.62.00.00.00.00.00 689.28.00 89.23 99.63 90.11 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)98.0 95.9 89.0 125.0 109.3 99.2 98.8 96.8 89.9 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B226 OF B358 Page : 11 Date 03/03/2000 Time 14:22:35.35 Case 1800: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@ 0000; power upra TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

....................................................................................................

LAKE SEEPAGE (CFS) .14 8051900)TOTAL EVAP (CFS) .19 8041900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) .19 8041900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 98.33 8041900)LAKE INLET TEMP (F) 133.28 7011900)LAKE OUTLET TEMP (F) 99.47 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.29-3.34-1.61.00.00.00.00.00 688.65.00 81.06 91.90 82.11 7011900)7021900)7031900)7021900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7071900)7261900)7071900)-.17-1.35-.73-.62.00.00.00.00.00 689.28.00 89.23 99.63 90.11-1.20057E+01

-9.63174E+01

-5.23042E+01

-4.40131E+01 0.OOOOOE+00 0.OOOOOE+00 0.00000E+00 0.OOOOOE+00 O.OOOOE+00 4.92177E+04 0.OOOOOE+00 6.37166E+03 7.11400E+03 6.43400E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)98.0 125.0 98.8 95.9 109.3 96.8 89.0 99.2 89.9 PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 ATTACHMENT B PAGE B227 OF B358 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Case 1803: LaSalle UHS (Updated Worst 36-Day Temp; Ti=98.8F Q 0300; power uprat 1 Page : 1 Date 03/03/2000 Time : 14:47:03.57 2 3 4 5 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 070100 1 1 690.81.35 79,75 78.15 29.70 22.22 13.42 1 98.8 R/I S/I 080500 20 0.2 690.341.4 260.8 181.9 102.2 60.0 43.8 0 94.3 86.0 1 1 5500.1.73.21 71.78 70.34 26.73 20.00 12.08 0 6 307.2 234.7 163.7 92.0 54.0 39.4 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B228 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created !Mon Oct 27 08:45:58 1997 Page : 2 Date 03/03/2000 Time 14:47:03.57 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10 .50 10 .50 10 50 10 .50 10 .50 10.50 10 .50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B REVISION NO. 8 PAGE B229 OF B358 Page : 3 Date 03/03/2000 Time : 14:47:03.62 9.54 9.54 9.54 9.54 9.54 9.S4 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B230 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page : 4 Date 03/03/2000 Time 14:47:03.62 9 .19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8 .70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B231 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page ; 5 Date 03/03/2000 Time : 14:47:03.62 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B232 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page: 6 Date : 03/03/2000 Time : 14:47:03.73 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B233 OF B358 Page ; 7 Date : 03/03/2000 Time : 14:47:04.06 Case 1803: LaSalle UHS (Updated Worst 36-Day Temp; Ti RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EF]690.000 81.350 341.400 689.000 79.750 260.800 688.000 78.150 181.900 687.000 29.700 102.200 686.000 22.220 60.000 685.000 13.420 43.800 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. 98.80 94 WEATHER STATION ID 0.=98.8F @ 0300; power uprat 5500.00 F AREA 73.210 71.780 70.340 26.730 20.000 12.080 EFF VOLUME 307.200 234.700 163.700 92.000 54.000 39.400.30 PROJECT NO. 11333-297 ATTACHMENT B PAGE B234 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 8 Date : 03/03/2000 Time 14:47:04.12 Case 1803: LaSalle UHS (Updated Worst 36-Day Temp; Ti=98.8F @ 0300; power uprat FPLANT 70100 -TPRISE 70100 -80500 R/I 80500 S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8. 850 8. 720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9 .190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B235 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8. 700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B236 OF B358 Program : LAKET-PC Page : 9 Number : 03.7.292-1.0 0 Date 03/03/2000 Created :Mon Oct 27 08:45:58 1997 Time : 14:47:04.23 Case 1803: LaSalle UHS (Updated Worst 36-Day Temp; Ti=98.8F @ 0300; power uprat SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.17 -.14 -.17 TOTAL EVAP (CFS) .00 -1.36 -1.28 -1.35 NATURAL EVAP (CFS) .00 -.73 -.72 -.73 FORCED EVAP (CFS) .00 -.63 -.56 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 00 .00 SLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.74 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.58 93.08 89.21 LAKE INLET TEMP (F) .00 99.26 101.77 99.61 LAKE OUTLET TEMP (F) .00 89.52 93.57 90.08 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 98.0 95.8 89.0 LAKE INLET TEMP (F) 124.0 109.0 99.1 LAKE OUTLET TEMP (F) 99.0 96.8 89.9 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B237 OF B358 Program : LAKET-PC Page : 10 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time : 14:47:04.23 Case 1803: LaSalle UHS (Updated Worst 36-Day Temp; Ti=98.8F @ 0300; power uprat CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.14 -.17 TOTAL EVAP (CrS) .00 -1.36 -1.28 -1.35 NATURAL EVAP (CFS) .00 -.73 -.72 -.73 FORCED EVAP (CFS) .00 -.63 -.56 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CPS) .00 .00 .00 .00 DAM SPILL (CrS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.74 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.58 93.08 89.21 LAKE INLET TEMP (F) .00 99.26 101.77 99.61 LAKE OUTLET TEMP (F) .00 89.52 93.57 90.08------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%------------------------------------------------------

NATURAL LAKE TEMP (F) 98.0 95.8 89.0 LAKE INLET TEMP (F) 124.0 109.0 99.1 LAKE OUTLET TEMP (F) 99.0 96.8 89.9 PROJECT NO. 11333-297 ATTACHMENT B PAGE B238 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 11 Date 03/03/2000 Time 14:47:04.23 Case 1803: LaSalle UHS (Updated Worst 36-Day Temp; Ti=98.8F @ 0300; power uprat TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

....................................................................................................

LAKE SEEPAGE (CFS) -.14 8051900)TOTAL EVAP (CFS) -.19 8041900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) -.19 8041900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 690.00 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 98.32 8041900)LAKE INLET TEMP (F) 132.46 )7011900)LAKE OUTLET TEMP (F) 99.95 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.28-3.33-1.64.00.00.00.00.00 688.65.00 81.06 91.91 82.24 7011900)7031900)7031900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7071900)7261900)7071900)-.17-1.35-.73-.62.00.00.00.00.00 689.28.00 89.21 99.61 90.08-1.20063E+01

-9.63009E+01

-5.23063E+01

-4.39946E+01 0.00000E+00 0.00000E+00 0.OOOOOE+00 0.00000E+00 0.00000E+00 4.92177E+04 0.OOOOOE+00 6.36976E+03 7.11241E+03 6.43251E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)98.0 95.8 89.0 224.0 109.0 99.1 99.0 96.8 89.9 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B239 OF B358 REVISION NO. 8 Page : 1 Date 03/03/2000 Time : 15:04:24.35 Case 1806: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.2F 0 0600; power uprat 1 2 3 4 5 7 8 999 FPLANWT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 070100 1 1 690.81.35 79.75 78.15 29.70 22.22 13.42 1 97.2 R/I s/I 080500 20 0.2 690.341.4 260.8 181.9 102.2 60.0 43.8 0 92.7 1 1 5500.1.73.21 71.78 70.34 26.73 20.00 12.08 0 6 307.2 234.7 163.7 92.0 54.0 39.4 86.0 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B240 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 2 Date : 03/03/2000 Time : 15:04:24.40 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B241 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 3 Date : 03/03/2000 Time 15:04:24.40 9.54 9.54 9.54 9.54 9.54 9.54 9.S4 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B242 OF B358 4 03/03/2000 Page Date Time Z ýZ:.ft:4-v 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8. 70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B243 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page : 5 Date : 03/03/2000 Time : 15:04:24.46 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B244 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 6 Date 03/03/2000 Time 15:04:24.51 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8 .22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B245 OF B358 Program : LAKET-PC Page : 7 Number 03.7.292-1.0 0 Date : 03/03/2000 Created : Mon Oct 27 08:45:58 1997 Time : 15:04:24.73 Case 1806: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.2F @ 0600; power uprat RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 81.350 341.400 73.210 307.200 689.000 79.750 260.800 71.780 234.700 688.000 78.150 181.900 70.340 163.700 687.000 29.700 102.200 26.730 92.000 686.000 22.220 60.000 20.000 54.000 685.000 13.420 43.800 12.080 39.400 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 97.20 92.70 WEATHER STATION ID 0.PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B246 OF B358 Page 8 Date : 03/03/2000 Time : 15:04:24.73 Case 1806: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.2F @ 0600; power uprat FPLANT 70100 -80500 R/I 86.000 TPRISE 70100 -80500 S/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8,850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10,500 10.270 9,990 9.990 9.990 9.990 9.700 9.700 9.540 9,540 9. 540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B247 OF B358 CALCULATION NO. L-002457 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 REVISION NO. 8 8.700 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B248 OF B358 Program LAKET-PC Page 9 Number 03.7.292-1.0 0 Date : 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 15:04:24.90 Case 1806: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.2F @ 0600; power uprat SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.17 -.14 -.17 TOTAL EVAP (CPS) .00 -1.36 -1.30 -1.35 NATURAL EVAP (CPS) .00 -.73 -7.4 -.73 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CPS) .00 .00 .00 .00 MAKEUP (CPS) .00 .00 .00 .00 BLOWDOWN (CPS) .00 .00 .00 .00 RUNOFF (CPS) .00 .00 .00 .00 DAM SPILL (CPS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.74 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.50 93.07 89.14 LAKE INLET TEMP (F) .00 99.19 101.74 99.54 LAKE OUTLET TEMP (F) .00 89.4S 93.54 90.02------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% SO%NATURAL LAKE TEMP (F) 97.5 95.7 89.0 LAKE INLET TEMP (F) 126.0 107.0 99.1 LAKE OUTLET TEMP (F) 99.0 96.6 89.9 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B249 OF B358 Program : LAKET-PC Page 10 Number : 03.7.292-1.0 0 Date 03/03/2000 Created :Mon Oct 27 08:45:58 1997 Time 15:04:24.90 Case 1806: LaSalle UHS (Updated Worst 36-Day Tamp; Ti=97.2F @ 0600; power uprat CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.14 -.17 TOTAL EVAP (CFS) .00 -1.36 -1.30 -1.35 NATURAL EVAP (CFS) .00 -.73 -.74 -.73 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.74 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.50 93.07 89.14 LAKE INLET TEMP (F) .00 99.19 101.74 99.54 LAKE OUTLET TEMP (F) .00 89.45 93.54 90.02 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.5 95.7 89.0 LAKE INLET TEMP (F) 126.0 107.0 99.1 LAKE OUTLET TEMP (F) 99.0 96.6 89.9 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B250 OF B358 Page : 11 Date 03/03/2000 Time 15:04:24.90 Case 1806: LaSalle UHS (Updated Worst 36-Day Temp; Ti=97.2F @ 0600; power uprat TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

.................................................- -------------------------LAKE SEEPAGE (CFS)TOTAL EVAP (CFS)NATURAL EVAP (CFS)FORCED EVAP (CFS)PRECIPITATION (CFS)MAKEUP (CFS)BLOWDOWN (CFS)RUNOFF (CFS)DAM SPILL (CFS)LAKE ELEVATION (FEET)DISSOLVED SOLIDS (PPM)NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)-.14-.19.00.19.00.00.00.00.00 690.00.00 98.31 131.22 99.94 8051900)8041900)7011900)8041900)7011900)7011900)7011900)7011900)7011900)7011900)7011900)8041900)7011900)7011900)-.20-4.25-3.29-1.69.00.00.00.00.00 688.65.00 81.03 91.93 82.08 7011900)7031900)7031900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7071900)7261900)7071900)-.17-1.35-.73-.62.00.00.00.00.00 689.28.00 89.14 99.54 90.02-1.20089E+01

-9.63718E+01

-5.24012E+01

-4.39706E+01 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.OOOOOE+00 4.92178E+04 0.OOOOOE+00 6.36490E+03 7.10792E+03 6.42803E+03 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.5 95.7 89.0 126.0 107.0 99.1 99.0 96.6 89.9 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B251 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 1 Date : 03/03/2000 Time : 15:18:40.69 Case 1E 1 2 3 4 5 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12 .02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 09: LaSalle UHS (Updated Worst 36-Day Temp; Ti=96.SF @ 0900; power uprat 070100 1 1 690.81.35 79.75 78.15 29.70 22.22 13.42 1 96.5 R/I S/I 080500 20 0.2 690.341.4 260.8 181.9 102.2 60.0 43.8 0 92 .0 86.0 1 1 5500.1.73.21 71.78 70.34 26.73 20.00 12.08 0 6 307.2 234.7 163.7 92.0 54.0 39.4 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B252 OF B358 Page : 2 Date 03/03/2000 Time 15:18:40.69 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B253 OF B358 CALCULATION NO. L-002457 Program LAKET-PC NUmber : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 3 Date : 03/03/2000 Time : 15:18:40.69 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9,19 9,19 9,19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9. 19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B254 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date : 03/03/2000 Time : 15:18:40.69 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B255 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 5 Date 03/03/2000 Time 15:18:40.75 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B256 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 6 Date : 03/03/2000 Time 15:18:40.80 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B257 OF B358 Program LAKET-PC Page 7 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 15:18:41.30 Case 1809: LaSalle UHS (Updated Worst 36-Day Temp; Ti=96.SF @ 0900; power uprat RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 81.350 341.400 73.210 307.200 689.000 79.750 260.800 71.780 234.700 688.000 78.150 181.900 70.340 163.700 687.000 29.700 102.200 26.730 92.000 686.000 22.220 60.000 20.000 54.000 685.000 13.420 43.800 12.080 39.400 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 96.50 92.00 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B258 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 8 Date 03/03/2000 Time 15:18:41.30 Case 1809: LaSalle UHS (Updated Worst 36-Day Temp; Ti=96.SF @ 0900; power uprat FPLANT 70100 -80500 R/I TPRISE 70100 -80500 S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9,190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10 .500 10.500 10 .500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9,190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B259 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B260 OF B358 Program : LAKET-PC Page : 9 Number 03.7.292-1.00 Date 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 15:18:41.46 Case 1809: LaSalle UHS (Updated Worst 36-Day Temp; Ti=96.5F @ 0900; power uprat SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.17 -.14 -.17 TOTAL EVAP (CFS) .00 -1.36 -1.31 -1.35 NATURAL EVAP (CFS) .00 -.73 -.76 -.74 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.74 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.47 93.03 89.10 LAKE INLET TEMP (F) .00 99.16 101.68 99.51 LAKE OUTLET TEMP (F) .00 89.43 93.49 89.99 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 95.6 88.9 LAKE INLET TEMP (F) 128.0 106.7 99.1 LAKE OUTLET TEMP (F) 99.0 96.6 89.8 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B261 OF B358 Program LAKET-PC Page : 10 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time : 15:18:41.46 Case 1809: LaSalle UHS (Updated Worst 36-Day Temp; Ti=96.5F @ 0900; power uprat CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.14 -.17 TOTAL EVAP (CFS) .00 -1.36 -1.31 -1.35 NATURAL EVAP (CFS) .00 -.73 -.76 -.74 FORCED EVAP (CFS) .00 -.63 -.55 -.62 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.36 688.74 689.28 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.47 93.03 89.10 LAKE INLET TEMP (F) .00 99.16 101.68 99.51 LAKE OUTLET TEMP (F) .00 89.43 93.49 89.99------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5%. 50%NATURAL LAKE TEMP (F) 97.0 95.6 88.9 LAKE INLET TEMP (F) 128.0 106.7 99.1 LAKE OUTLET TEMP (F) 99.0 96.6 89.8 PROJECT NO. 11333-297 ATTACHMENT B PAGE B262 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 11 Date : 03/03/2000 Time 15:18:41.46 Case 1809: LaSalle UHS (Updated Worst 36-Day Temp; Ti=96.5F @ 0900; power uprat TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE VALUE (ACRE-FEET)

.......................................................................- --------------LAKE SEEPAGE (CFS) -.14 80S1900)TOTAL EVAP (CFS) -.19 8041900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) -.19 8041900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 690.00 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 98.30 8041900)LAKE INLET TEMP (F) 132.78 7011900)LAKE OUTLET TEMP (F) 99.98 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.29-3.28-1.71.00.00.00.00.00 688.65.00 81.03 91.95 82.15 7011900)7031900)7031900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7061900)7251900)7061900)-.17-1.35-74-.62.00.00.00.00.00 689.28.00 89.10 99.51 89.99-1.20097E+01

-9.64773E+01

-5.25177E+01

-4.39596E+01 0.OOOOOE+00 0.00000E+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 4.92178E+04 0.OOOOOE+00 6.36216E+03 7.10574E+03 6.42586E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 128.0 99.0 95.6 106.7 96.6 88.9 99.1 89.8 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B263 OF B358 REVISION NO. 8 Page : 1 Date 03/07/2000 Time 17:35:13.43 Case 1809: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=96.5F @ 0900; power u 1 2 3 4 5 070100 1 1 690.81.35 79.75 78.15 29.70 22.22 13.42 1 96.S R/I S/I 080500 20 0.2 690.341.4 260.8 181.9 102.2 60.0 43.8 0 92.0 86.0 1 1 5500.1.73.21 71.78 70.34 26.73 20.00 12.08 0 6 307.2 234.7 163.7 92.0 54.0 39.4 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13 .88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B264 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 2 Date : 03/07/2000 Time : 17:35:13.49 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10 .50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10 .50 10 .50 10 .50 10.50 10 .50 10 .27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B265 OF B358 Page : 3 Date 03/07/2000 Time 17:35:13.49 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9 .19 9.19 9.19 9 .19 9.19 9.19 9.19 9.19 9.19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B266 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date 03/07/2000 Time 17:35:13.49 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B267 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:S8 1997 REVISION NO. 8 Page : 5 Date : 03/07/2000 Time : 17:35:13.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B268 OF B358 REVISION NO. 8 Page : 6 Date : 03/07/2000 Time : 17:35:13.54 8.49 8 .44 8 .22 8 .22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8 .22 8 .22 8 .22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8 .22 8 .22 8 .22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B PAGE B269 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 7 Date : 03/07/2000 Time 17:35:14.04 Case 1809: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=96.5F @ 0900; power u RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE:.20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

=690.00 DRAWDOWN CURVE ELEVATION 690.000 689.000 688.000 687.000 686.000 685.000 PLOT FILE FREQ TOTAL AREA 81.350 79.750 78.150 29.700 22.220 13 .420 1 INCREMENTS AX TOTAL VOLUME 341.400 260.800 181.900 102.200 60.000 43.800 V 0 HOURS EFF AREA 73.210 71.780 70.340 26.730 20.000 12.080 EFF VOLUME 307.200 234.700 163.700 92.000 54.000 39.400 INITIAL FORCED/NATURAL LAKE TEMPS. =96.50 92.00 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B270 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 8 Date 03/07/2000 Time 17:35:14.04 Case 1809: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=96.5F @ 0900; power u FPLANT 70100 -TPRISE 70100 -80500 R/I 80500 S/I 86.000 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8 .700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B271 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8 .490 8 .490 8 .490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8 .220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B272 OF B358 Program LAKET-PC Page 9 Number 03.7.292-1.0 0 Date 03/07/2000 Created Mon Oct 27 08:45:58 1997 Time 17:35:14.20 Case 1809: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=96.SF @ 0900; power u SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.14 -.16 TOTAL EVAP (CFS) .00 -1.59 -1.32 -1.55 NATURAL EVAP (CFS) .00 -.95 -.76 -.92 FORCED EVAP (CFS) .00 -.65 -.56 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.56 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.65 89.93 90.55 LAKE INLET TEMP (F) .00 101.11 98.69 100.77 LAKE OUTLET TEMP (F) .00 91.37 90.65 91.27 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.8 96.2 90.8 LAKE INLET TEMP (F) 127.0 109.3 100.7 LAKE OUTLET TEMP (F) 99.0 97.3 91.5 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B273 OF B358 Program LAKET-PC Page 10 Number 03.7.292-1.0 0 Date 03/07/2000 Created Mon Oct 27 08:45:58 1997 Time 17:35:14.20 Case 1809: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=96.5F @ 0900; power u CUMULATIVE SEASONAL

SUMMARY

SUMMER QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.17 -.14 -.16 TOTAL EVAP (CFS) .00 -1.59 -1.32 -1.55 NATURAL EVAP (CFS) .00 -.95 -.76 -.92 FORCED EVAP (CFS) .00 -.65 -.56 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.56 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.65 89.93 90.55 LAKE INLET TEMP (F) .00 101.11 98.69 100.77 LAKE OUTLET TEMP (F) .00 91.37 90.65 91.27------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%------------------------------------------------------

NATURAL LAKE TEMP (F) 97.8 96.2 90.8 LAKE INLET TEMP (F) 127.0 109.3 100.7 LAKE OUTLET TEMP (F) 99.0 97.3 91.5 PROJECT NO. 11333-297 ATTACHMENT B PAGE B274 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 11 Date 03/07/2000 Time 17:35:14.20 Case 1809: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=96.SF @ 0900; power u TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

....................................................................................................

LAKE SEEPAGE (CFS) -.13 8051900)TOTAL EVAP (CFS) -.24 8051900)NATURAL EVAP (CFS) .00 7031900)FORCED EVAP (CFS) -.23 7311900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 98.25 7041900)LAKE INLET TEMP (F) 132.14 7011900)LAKE OUTLET TEMP (F) 99.79 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.05-2.67-1.56.00.00.00.00.00 688.47.00 80.47 89.64 81.38 7011900)7051900)7051900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7241900)7241900)7241900)-.16-1.55-.92-.63.00.00.00.00.00 689.19.00 90.55 100.77 91.27-1.17357E+01

-1.10956E+02

-6.57451E+01

-4.52110E+01 0.00000E+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 4.92117E+04 0.OOOOOE+00 6.46545E+03 7.19565E+03 6.51731E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.8 96.2 90.8 127.0 109.3 100.7 99.0 97.3 91.5 PROJECT NO. 11333-297 ATTACHMENT B PAGE B275 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:4S:58 1997 REVISION NO. 8 Page : 1 Date : 03/06/2000 Time : 11:31:44.61 Case 1812: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.5F @ 1200; power u 1 2 3 4 S 070100 1 1 690, 81.35 79.75 78.15 29.70 22.22 13.42 1 97.5 R/I S/I 080500 20 0.2 690.341.4 260.8 181.9 102.2 60.0 43.8 0 93.0 86.0 1 1 5500.1.73.21 71.78 70.34 26.73 20.00 12.08 0 6 307.2 234.7 163.7 92.0 54.0 39.4 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 PROJECT NO. 11333-297 ATTACHMENT B PAGE B276 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date 03/06/2000 Time 11:31:44.61 11.07 11.07 11.07 10.87 10.86 10.86 10 .50 10 .50 10 .50 10 .50 10 .50 10.50 10 .50 10 .S0 10 .50 10.50 10.50 10.50 10 .50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B277 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 3 Date 03/06/2000 Time 11:31:44.61 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9 .19 9.19 9 .19 9.19 9.19 9.19 9 .19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B278 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date 03/06/2000 Time 11:31:44.61 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8 .70 8 .70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B279 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 5 Date : 03/06/2000 Time 11:31:44.61 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B280 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 Program Number Created LAKET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 6 Date : 03/06/2000 Time : 11:31:44.66 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B281 OF B358 Program : LAKET-PC Page 7 Number 03.7.292-1.0 0 Date 03/06/2000 Created Mon Oct 27 08:45:58 1997 Time 11:31:44.94 Case 1812: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.SF @ 1200; power u RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 81.350 341.400 73.210 307.200 689.000 79.750 260.800 71.780 234.700 688.000 78.150 181.900 70.340 163.700 687.000 29.700 102.200 26.730 92.000 686.000 22.220 60.000 20.000 54.000 685.000 13.420 43.800 12.080 39.400 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. 97.50 93.00 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B282 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page : 8 Date : 03/06/2000 Time : 11:31:44.94 Case 1812: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.5F @ 1200; power u FPLANT 70100 -80500 R/I 86.000 TPRISE 70100 -80500 s/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9 .190 9.190 9 .190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9 .540 9 .540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8 .850 8.850 8 850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B283 OF B358 CALCULATION NO. L-002457 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 REVISION NO. 8 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B284 OF B358 Page 9 Date 03/06/2000 Time 11:31:45.10 Case 1812: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.SF @ 1200; power u SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.17 TOTAL EVAP (CFS) .00 -1.60 NATURAL EVAP (CFS) .00 -.95 FORCED EVAP (CFS) .00 -.65 PRECIPITATION (CFS) .00 .00 MAKEUP (CFS) .00 .00 BLOWDOWN (CFS) .00 .00 RUNOFF (CFS) .00 .00 DAM SPILL (CFS) .00 .00 LAKE ELEVATION (FEET) .00 689.29 DISSOLVED SOLIDS (PPM) .00 .00 NATURAL LAKE TEMP (F) .00 90.68 LAKE INLET TEMP (F) .00 101.14 LAKE OUTLET TEMP (F) .00 91.40------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.14-1.32-.76-.56.00.00.00.00.00 688.56.00 89.93 98.69 90.65-.16-1.56-.92-.63.00.00.00.00.00 689.19.00 90.57 100.80 91.29 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.8 128.0 99.3 96.0 109.1 97.3 90.9 100.7 91.5 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B285 OF B358 Program : LAKET-PC Page : 10 Number : 03.7.292-1.0 0 Date 03/06/2000 Created :Mon Oct 27 08:45:58 1997 Time 11:31:45.10 Case 1812: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.SF @ 1200; power u CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CPS) .00 -.17 -.14 -.16 TOTAL EVAP (CFS) .00 -1.60 -1.32 -1.56 NATURAL EVAP (CFS) .00 -.95 -.76 -.92 FORCED EVAP (CPS) .00 -.65 -.56 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CPS) .00 .00 .00 .00 RUNOFF (CPS) .00 .00 .00 .00 DAM SPILL (CPS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.29 688.56 689.19 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.68 89.93 90.57 LAKE INLET TEMP (F) .00 101.14 98.69 100.80 LAKE OUTLET TEMP (F) .00 91.40 90.65 91.29 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.8 96.0 90.9 LAKE INLET TEMP (F) 128.0 109.1 100.7 LAKE OUTLET TEMP (F) 99.3 97.3 91.5 PROJECT NO. 11333-297 ATTACHMENT B PAGE B286 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 11 Date 03/06/2000 Time 11:31:45.10 Case 1812: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=97.5F @ 1200; power u TOTAL CUMULATIVE

SUMMARY

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE VALUE (ACRE-FEET)

....................................................................................................

LAKE SEEPAGE (CFS) -.13 8051900)TOTAL EVAP (CFS) .24 8051900)NATURAL EVAP (CFS) .00 7031900)FORCED EVAP (CFS) .23 7311900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 98.22 7041900)LAKE INLET TEMP (F) 134.65 7011900)LAKE OUTLET TEMP (F) 99.98 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.04-2.66-1.67.00.00.00.00.00 688.46.00 80.47 89.64 81.37 7011900)7051900)7051900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7241900)7241900)7241900)-.16-1.56-.92-.63.00.00.00.00.00 689.19.00 90.57 100.80 91.29-1.17287E+01

-1.11183E+02

-6.59592E+01

-4.52236E+01 0.00000E+00 0 .OOOOOE+00 0 OOOOOE+00 0 .OOOOOE+00 0 OOOOOE+00 4. 92115E+04 0 .00000E+00 6 .46728E+03 7.19739E+03

6. 51890E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.8 96.0 90.9 128.0 109.1 100.7 99.3 97.3 91.5 PROJECT NO. 11333-297 CALCULATION NO. L-002457 REVISION NO. 8 ATTACHMENT B PAGE B287 OF B358 Program Number Created LAYET-PC 03.7.292-1.0 0 Mon Oct 27 08:45:58 1997 Page : 1 Date : 03/06/2000 Time 13:09:44.55 Case 1815: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.4F @ 1500; power u 1 2 3 4 5 070100 1 1 690.81.35 79.75 78.15 29.70 22.22 13.42 1 99.4 R/I S/I 080500 20 0.2 690.341.4 260 .8 181.9 102.2 60.0 43.8 0 94.9 1 1 5500.I.73.21 71.78 70.34 26.73 20.00 12.08 0 6 307.2 234.7 163.7 92.0 54.0 39.4 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.09 11.07 86.0 PROJECT NO. 11333-297 ATTACHMENT B PAGE B288 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 2 Date 03/06/2000 Time 13:09:44.55 11.07 11.07 11.07 10.87 10.86 10.86 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B289 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page 3 Date : 03/06/2000 Time 13:09:44.55 9.54 9.54 9 .54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 ATTACHMENT B PAGE B290 OF B358 Page : 4 Date 03/06/2000 Time : 13:09:44.55 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8 .72 8.70 8.70 8.70 8.70 8.70 8 .70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8 .70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B291 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 5 Date : 03/06/2000 Time 13:09:44.55 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8 .49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B292 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 6 Date : 03/06/2000 Time 13:09:44.66 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B293 OF B358 Program : LAKET-PC Page 7 Number 03.7.292-1.0 0 Date 03/06/2000 Created :Mon Oct 27 08:45:58 1997 Time 13:09:45.10 Case 1815: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.4F @ 1500; power u RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 81.350 341.400 73.210 307.200 689.000 79.750 260.800 71.780 234.700 688.000 78.150 181.900 70.340 163.700 687.000 29.700 102.200 26.730 92.000 686.000 22.220 60.000 20.000 54.000 685.000 13.420 43.800 12.080 39.400 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 99.40 94.90 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B294 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 Page Date Time* 8: 03/06/2000

13:09:45.10 Case 1815: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.4F @ 1500; power u FPLANT 70100 -80500 R/I 84. 000 TPRISE 70100 -80500 s/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11.490 11.490 11.070 10.870 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.150 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B295 OF B358 CALCULATION NO. L-002457 REVISION NO. 8 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8 .490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 PROJECT NO. 11333-297 ATTACHMENT B PAGE B296 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number : 03.7,292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 9 Date 03/06/2000 Time : 13:09:45.26 Case 1815: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.4F @ 1500; power u SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS)TOTAL EVAP (CFS)NATURAL EVAP (CFS)FORCED EVAP (CFS)PRECIPITATION (CFS)MAKEUP (CFS)BLOWDOWN (CFS)RUNOFF (CFS)DAM SPILL (CFS)LAKE ELEVATION (FEET)DISSOLVED SOLIDS (PPM)NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F).00.00.00.00.00.00.00.00.00.00.00.00.00.00-.17-1.60-.96-.65.00.00.00.00.00 689.28.00 90.67 101.10 91.37-.14-1.32-.76-.56.00.00.00.00.00 688.56.00 89.93 98.68 90.64-.16-1.56-.93-.63.00.00.00.00.00 689.18.00 90.56 100.77 91.27 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.8 127.0 99.0 96.0 90.9 109.0 100.7 97.1 91.6 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B297 OF B358 Program : LAKET-PC Page 10 Number : 03.7.292-1.0 0 Date : 03/06/2000 Created :Mon Oct 27 08:45:58 1997 Time 13:09:45.26 Case 1815: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.4F @ 1500; power u CUMULATIVE SEASONAL

SUMMARY

SUMMER MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE LAKE SEEPAGE (CFS) .00 -.17 -.14 -.16 TOTAL EVAP (CFS) .00 -1.60 -1.32 -1.56 NATURAL EVAP (CFS) .00 -.96 -.76 -.93 FORCED EVAP (CFS) .00 -.65 -.56 -.63 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CFS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.28 688.56 689.18 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 90.67 89.93 90.56 LAKE INLET TEMP (F) .00 101.10 98.68 100.77 LAKE OUTLET TEMP (F) .00 91.37 90.64 91.27 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.8 96.0 90.9 LAKE INLET TEMP (F) 127.0 109.0 100.7 LAKE OUTLET TEMP (F) 99.0 97.1 91.6 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B298 OF B358 REVISION NO. 8 Page : 11 Date 03/06/2000 Time : 13:09:45.26 Case 1815: LaSalle UHS (Updated Worst 5/1/30-Day Temp; Ti=99.4F @ i500; power u TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE VALUE (ACRE-FEET)

LAKE SEEPAGE (CFS) -.13 8051900)TOTAL EVAP (CFS) -.24 8051900)NATURAL EVAP (CFS) .00 7031900)FORCED EVAP (CFS) -.23 7311900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 98.16 7041900)LAKE INLET TEMP (F) 135.2S 7011900)LAKE OUTLET TEMP (F) 99.99 7011900)------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%------------------------------------------------------

-.20-4.05-3.03-1.61.00.00.00.00.00 688.46.00 80.46 89.62 81.36 7011900)7051900)7051900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7241900)7241900)7241900)-.16-1.56-.93-.63.00.00.00.00.00 689.18.00 90.56 100.77 91.27-1.17127E+01

-1.11671E+02

-6.64355E+01

-4.52352E+01 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 0.OOOOOE+00 4.92111E+04 0.OOOOOE+00 6.46670E+03 7.19528E+03 6.51694E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.8 96.0 90.9 127.0 109.0 100.7 99.0 97.1 91.6 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B299 OF B358 REVISION NO. 8 Page : 1 Date 03/03/2000 Time : 16:37:36.31 Case 1818: LaSalle UtS (Updated Worst 36-Day Temp; Ti=100.0F

@ 1800; power upra 1 2 3 4 5 070100 1 1 690.81.35 79.75 78.15 29.70 22.22 13.42 1 100.0 R/I S/I 080500 20 0.2 690.341.4 260.8 181.9 102.2 60.0 43.8 0 95.5 86.0 1 1 5500.I.73.21 71.78 70.34 26.73 20.00 12.08 0 6 307.2 234.7 163 .7 92.0 54.0 39.4 7 8 999 FPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12,43 12.24 12,02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11.49 11. 09 11.07 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B300 OF B358 REVISION NO. 8 Page : 2 Date : 03/03/2000 Time : 16:37:36.31 11.07 11.07 11.07 10.87 10.86 10.86 10,50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.50 10.27 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.99 9.72 9.70 9.70 9.70 9.70 9.70 9.54 9.54 9.54 9.54 9.54 PROJECT NO. 11333-297 ATTACHMENT B PAGE B301 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 3 Date 03/03/2000 Time : 16:37:36.37 9.54 9.54 9.54 9.54 9.54 9.54 9.54 9.40 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 9 .19 9.19 9.19 9.19 9.19 9.19 9.19 9.19 PROJECT NO. 11333-297 ATTACHMENT B PAGE B302 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 4 Date 03/03/2000 Time 16:37:36.37 9.19 9.19 9.15 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.85 8.72 8.70 8.70 8.70 8.70 8 .70 8.70 8 .70 8 .70 8.70 8 .70 8.70 8.70 8 .70 8.70 8 .70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.70 8.52 8.49 PROJECT NO. 11333-297 ATTACHMENT B REVISION NO. 8 PAGE B303 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 Page : 5 Date 03/03/2000 Time : 16:37:36.37 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8 .49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 8.49 PROJECT NO. 11333-297 ATTACHMENT B PAGE B304 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:SB 1997 REVISION NO. 8 Page : 6 Date : 03/03/2000 Time : 16:37:36.42 8.49 8.44 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8 .22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 8.22 END PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B305 OF B358 Program : LAKET-PC Page 7 Number : 03.7.292-1.0 0 Date : 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time : 16:37:36.92 Case 1818: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@ 1800; power upra RUN 36 DAYS FROM 70100 TO 80500 PLOT FILE OPTION : 1 CYCLE FLAG: 1 WEATHER FILE OPTION: 1 ANEMOMETER HEIGHT 20.00 DENSITY: 62.40 SEEPAGE: .20 LAKE LENGTH: 5500.00 INITIAL LAKE ELEVATION

= 690.00 DRAWDOWN CURVE ELEVATION TOTAL AREA TOTAL VOLUME EFF AREA EFF VOLUME 690.000 81.350 341.400 73.210 307.200 689.000 79.750 260.800 71.780 234.700 688.000 78.150 181.900 70.340 163.700 687.000 29.700 102.200 26.730 92.000 686.000 22.220 60.000 20.000 54.000 685.000 13.420 43.800 12.080 39.400 PLOT FILE FREQ 1 INCREMENTS AT 0 HOURS INITIAL FORCED/NATURAL LAKE TEMPS. = 100.00 95.50 WEATHER STATION ID 0.PROJECT NO. 11333-297 ATTACHMENT B PAGE B306 OF B358 CALCULATION NO. L-002457 Program LAKET-PC NUmnber : 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page ; 8 Date 03/03/2000 Time 16:37:36.92 Case 1818: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@ 1800; power upra FPLANT 70100 -80500 R/r 86.000 TPRISE 70100 -80500 S/I 35.260 15.320 13.880 13.300 12.570 12.020 11.490 11.490 11.090 11.070 10.500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.400 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.720 8.700 8.700 8.700 8.700 28.790 14.970 13.450 13.240 12.430 12.020 11;490 11.490 11.070 10 .870 10 .500 10.500 10.500 10.500 9.990 9.990 9.990 9.990 9.990 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.700 8 .700 8.700 8.700 8.700 16.680 14.530 13.300 12.730 12.240 12.020 11.490 11.490 11.070 10.860 10 .500 10.500 10.500 10.500 9.990 9.990 9.990 9 .990 9.720 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9. 190 9 .190 9 .150 8.850 8.850 8.850 8.850 8.850 8.700 8. 700 8.700 8.700 8.700 16.280 14.290 13.300 12.730 12.020 12.010 11.490 11.490 11.070 10.860 10.500 10.500 10.500 10.270 9.990 9.990 9.990 9.990 9.700 9.700 9.540 9.540 9.540 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 9.190 8.850 8.850 8.850 8.850 8.850 8.850 8.700 8.700 8.700 8.700 8.700 PROJECT NO. 11333-297 ATTACHMENT B PAGE B307 OF B358 CALCULATION NO. L-002457 8.700 8.700 8.490 8.490 8.490 8.490 8.490 8.49d 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 REVISION NO. 8 8.700 8.520 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8 .700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8 .490 8.490 8.490 8.490 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.220 8.700 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.490 8.440 8.220 8.220 8 .220 8.220 8.220 8.220 8.220 8.220 8,220 8.220 8 .220 8.220 PROJECT NO. 11333-297 ATTACHMENT B PAGE B308 OF B358 CALCULATION NO. L-002457 Program LAKET-PC Number 03.7.292-1.0 0 Created Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page: 9 Date : 03/03/2000 Time : 16:37:37.08 Case 1818: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.OF

@ 1800; power upra SEASONAL

SUMMARY

FOR SUMMER ( 6/1900 -8/1900 )QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 TOTAL EVAP (CFS) .00 -1.35 NATURAL EVAP (CFS) .00 -.72 FORCED EVAP (CFS) .00 -.62 PRECIPITATION (CFS) .00 .00 MAKEUP (CFS) .00 .00 BLOWDOWN (CFS) .00 .00 RUNOFF (CFS) .00 .00 DAM SPILL (CFS) .00 .00 LAKE ELEVATION (FEET) .00 689.37 DISSOLVED SOLIDS (PPM) .00 .00 NATURAL LAKE TEMP (F) .00 88.35 LAKE INLET TEMP (F) .00 99.05 LAKE OUTLET TEMP (F) .00 89.31------------------------------------------------------

TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.14-1.32-.78-.54.00.00.00.00.00 688.75.00 92.85 101.50 93.30-.17-1.34-.73-.61.00.00.00.00.00 689.29.00 88.98 99.39 89.87 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 125.0 98.0 95.0 105.8 96.0 88.9 99.1 89.8 PROJECT NO. 11333-297 ATTACHMENT B CALCULATION NO. L-002457 REVISION NO. 8 PAGE B309 OF B358 Program LAKET-PC Page : 10 Number 03.7.292-1.0 0 Date : 03/03/2000 Created Mon Oct 27 08:45:58 1997 Time 16:37:37.08 Case 1818: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@ 1800; power upra CUMULATIVE SEASONAL

SUMMARY

SUMMER................................................................................

QUANTITY MONTHLY AVERAGES AVERAGE JUN JUL AUG VALUE................................................................................

LAKE SEEPAGE (CFS) .00 -.17 -.14 -.17 TOTAL EVAP (CFS) .00 -1.35 -1.32 -1.34 NATURAL EVAP (CFS) .00 -.72 -.78 -.73 FORCED EVAP (CFS) .00 -.62 -.54 -.61 PRECIPITATION (CFS) .00 .00 .00 .00 MAKEUP (CPS) .00 .00 .00 .00 BLOWDOWN (CFS) .00 .00 .00 .00 RUNOFF (CFS) .00 .00 .00 .00 DAM SPILL (CFS) .00 .00 .00 .00 LAKE ELEVATION (FEET) .00 689.37 688.75 689.29 DISSOLVED SOLIDS (PPM) .00 .00 .00 .00 NATURAL LAKE TEMP (F) .00 88.35 92.85 88.98 LAKE INLET TEMP (F) .00 99.05 101.50 99.39 LAKE OUTLET TEMP (F) .00 89.31 93.30 89.87 TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%NATURAL LAKE TEMP (F) 97.0 9S.0 88.9 LAKE INLET TEMP (F) 125.0 105.8 99.1 LAKE OUTLET TEMP (F) 98.0 96.0 89.8 PROJECT NO. 11333-297 CALCULATION NO. L-002457 Program : LAKET-PC Number 03,7.292-1.0 0 Created : Mon Oct 27 08:45:58 1997 ATTACHMENT B PAGE B310 OF B358 REVISION NO. 8 Page : 11 Date 03/03/2000 Time 16:37:37.08 Case 1818: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@ 1800; power upra TOTAL CUMULATIVE

SUMMARY

....................................................................................................

QUANTITY MAXIMUM MINIMUM AVERAGE TOTAL FLOW VALUE ( DATE ) VALUE ( DATE ) VALUE (ACRE-FEET)

....................................................................................................

LAKE SEEPAGE (CFS) .14 8051900)TOTAL EVAP (CFS) .19 8031900)NATURAL EVAP (CFS) .00 7011900)FORCED EVAP (CFS) .19 8031900)PRECIPITATION (CFS) .00 7011900)MAKEUP (CFS) .00 7011900)BLOWDOWN (CFS) .00 7011900)RUNOFF (CFS) .00 7011900)DAM SPILL (CFS) .00 7011900)LAKE ELEVATION (FEET) 689.99 7011900)DISSOLVED SOLIDS (PPM) .00 7011900)NATURAL LAKE TEMP (F) 98.27 8031900)LAKE INLET TEMP (F) 133.50 7011900)LAKE OUTLET TEMP (F) 98.57 8031900)TEMPERATURE FREQUENCY OF OCCURENCES 1% 5% 50%-.20-4.28-3.21-1.77.00.00.00.00.00 688.65.00 81.00 92.05 82.24 7011900)7021900)7021900)7011900)7011900)7011900)7011900)7011900)7011900)8051900)7011900)7061900)7251900)7061900)-.17-1.34-.73-.61.00.00.00.00.00 689.29.00 88.98 99.39 89.87-1.20347E+01

-9.60339E+01

-5. 22645E+01-4 .37694E+01 0 OOOOOE+00 0 OOOOOE+00 0 OOOOOE+00 0. 00000E+00 0 .OOOOOE+00

4. 92184E+04 0 OOOOOE+00 6.35326E+03 7.09704E+03 6.41702E+03 NATURAL LAKE TEMP (F)LAKE INLET TEMP (F)LAKE OUTLET TEMP (F)97.0 95.0 88.9 125.0 105.8 99.1 98.0 96.0 89.8 PROJECT NO. 11333-297 ATTACHMENT B PAGE B311 OF B358 CALCULATION NO. L-002457 Program : LAKET-PC Number : 03.7.292-1.0 0 Created :Mon Oct 27 08:45:58 1997 REVISION NO. 8 Page : 1 Date : 03/03/2000 Time : 16:42:04.08 Case 1821: LaSalle UHS (Updated Worst 36-Day Temp; Ti=100.0F

@ 2100; power upra 1 2 070100 080500 1 1 3 1 20 4 1 0.2 5500. 0 5 690. 690. 1. 6 81.35 79.75 78.15 29.70 22.22 13.42 1 100.0 R/I S/I 341.4 260.8 181.9 102.2 60.0 43.8 0 95.5 73 .21 71.78 70.34 26.73 20.00 12.08 307.2 234.7 163.7 92.0 54.0 39.4.7 999 PPLANT TPRISE 35.26 28.79 16.68 16.28 15.32 14.97 14.53 14.29 13.88 13.45 13.30 13.30 13.30 13.24 12.73 12.73 12.57 12.43 12.24 12.02 12.02 12.02 12.02 12.01 11.49 11.49 11.49 11.49 11.49 311.49 11.49 11.49 11.09 11.07 86.0 PROJECT NO. 11333-297