ML19347E909
| ML19347E909 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 02/18/1981 |
| From: | DELAWARE, STATE OF |
| To: | |
| References | |
| D-65-76CP(8), NUDOCS 8105140246 | |
| Download: ML19347E909 (18) | |
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DOCKET NO. D-65-76CP (8) + 6)
DELAWARE RIVER BASIN COMMISSION g h u.a.ee n s m u sses Neshaminy Water Resources Authority g Neshaminy Watershed Plan - Water Supply , f Bucks and Montcomery Counties, Pennsylvania #
as PROCEEDINGS This is an application submitted by the Neshaminy Water Resources Authority (NWRA) on July 5, 1979 and referred to the Commission, pursuant to an Administrative Agreement under Sections 2-3.4 (a) and 2-3.7 of the Administrative Manual - Part II, Rules of Practice and Procedure, by the Pennsylvania Department of Environmental Resources (PADER), for review of the following components of the water supply plan: Point Pleasant Intake and Pumping Station; Combined Transmission Main; North Branch Trans-mission Main; and North Branch Water Treatment Plant Intakes and Service Areas. The application was amended with the submission of details of a revised Delaware River Intake Structure on September 23, 1980. The application was reviewed for revision of the project previously included in the Comprehensive Plan and approval under Section 3.8 of the Delaware River Basin Compact. Simultaneously
- the Delaware River Basin Commission (DRBC) considered an application submitted by Philadelphia Electric Company (PECO) to receive water from the Point Pleasant project and convey the water to Perkiomen Creek.
The DRBC prepared an environmental assessment (February 15, 1980) on the proposal by the NWRA for the North Branch Water Treatment Plant (NBWTP) which will withdraw water from Pine Run and/or North Branch Neshaminy Creek and associated components including the Point Pleasant Pumping Station. The enviroamental assessment also included the proposal by PECO for the Bradshaw Reservoir and force main to the East Branch of Perkiomen Creek.
The assessment concluded that an environmental impact state-ment on the NBWTP and a new environmental impact statement on the Point Pleasant Divercion Plan were not necessary. Accordingly, on Februa'ry 15, 1980, the Executive Director gave notice of his intention to issue a negative declaration based upon the environmental assessment, in accordance with the Commission's Rules of Practice and Procedure applicable at the time. Numerous comments were received in response to the Executive Director's notice of intent and the Commission responded to the comments in a Final Environmental Assessment issued with the Negative Declaration on August 25, 1980.
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.- 'D'-65-76CP (8) b A public hearing on this Comprehensive Plan revision, including f the amendment dated September 23, 1980, and approval of thi's project under Section 3.8 of the Compact was held on November 18, 1980. Testimony was received from 77 speakers and written state- !
ments were received from 184 parties prior to the close of the hearing on December 12, 1980. Four of the five designated alternate i Commissioners were present at the hearing and each alternate l Commissioner has received the complete record of the hearing. l
- The PADER has approved the withdrawal of surface water for the NBWTP from North Branch Neshaminy Creek, and from Pine Run, and has approved a diversion of surface water from the Delaware at
! Point Pleasant to the North Branch Neshaminy Creek.
PADER's water obstructions and water treatment facilities permits for the NBWTP are awaiting completion of the detailed t
- construction plans.
Applications have been submitted to the U. S. Army Corps of l Engineers for the project facilities.
i The Delaware (Pennsylvania) Canal has been designated a i National Historic Landmark. The intake conduit from the Delaware River to the pumping station must cross the Canal. The Pennsylvania Office of Historic Preservation has determined that the proposed
. project will have an adverse effect on the Canal and has directed that a federal agency must consult with the Advisory Council on Historic Places.
The Pennsylvania Office of Historic Preservation has also determined that the preposed project will have en adverse effect on a potential historic district. Accordingly, the State Historic Preservation Officer has directed that a federal agency must request determination of eligibility for listing the historic
- district on the National Register of Historic Places. ;
DRBC, by letter dated August 28, 1980, requesteu the Corps of ,
Engineers to implement the procedures in accordance with applicable federal regulations. The Corps of Engineers agreed to comply with the requirement of the National Historic Preservation Act of 1966 in a letter dated January 27, 1981.
DESCRIPTION Purpose.-- The purpose of this project is to incorporate revisions to the Neshaminy Watershed Project currently in the Comprehensive Plan and to approve under Section 3.8 of the Compact the plan of surface sater withdrawals and .related facilities for the NBWTP. The project will provide supplemental water supplies to water-short areas of central Bucks and Montgomery Counties.
d-65.-76CP (8) 3 Location.-- The locations of the facilities to be constructed remain es.Sentially the same as that described in the Comprehensive Plan and are shown on Figure A attached hereto. More specific locations of the intake and discharge facilities are as follows:
Facility River Mile Pt. Pleasant Intake (Delaware River) 156.87 Pt. Pleasant Discharge (North Branch Neshaminy Creek) 115.63-40.0-11.2 North Branch Water Treatment Plant Intakes (North Branch) 115.63-40.0-0.7 (Pine Run) 115.63-40.0 .45 .05 The final design location of all the project facilities are detailed on plans included in the report entitled "3.8 Application to Delaware River Basin Commission for Point Pleasant Pumping Station, combined Transmission Main, North Branch Transmission Main, North Branch Water Treatment Plant, Western Transmission Main, Southern Transmission Main" dated June 1979.
The NBWTP, also known as the Chalfont Plant, will be located at the confluence of Pine Run with North Branch of Neshaminy Creek in the Borough of Chalfont, Bucks County, Pennsylvania. -
The western transmission main will essentially parallel the Reading Railroad Line through New Britain Township to the County Line to suppiy water to Montgomery County purveyors.
The southern transmission line will extend across Warrington Township to supply water to that area.
The Point Pleasant Pumping Station will be located just off Pennsylvania State Route 32 and just south of Hickory Creek in Plumstead Township, Bucks County, Pennsylvania.
The combined transmission main will extend from the pumping station to PECO's proposed Bradshaw Reservoir near Bradshaw Road and Texas Eastern Pipeline Right-of-Way.
The North Branch transmission main will extend frem Bradshaw Reservoir to North Branch Neshaminy Creek near Pennsylvania Route 413.
Service area.-- The NBWTP is designed to supply water to water purveyors in portions of (central) Bucks and Montgomery Counties. The service area is delineated on a plan titled "Neshaminy Water Supply System" and identified as Document No. 12 in the 3.8 application report dated June 1979.
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. D-65-76CP (8) -
The water delivered to PECO for transmission to Perkiomen Creek will be available for use at the Limerick Generating Station which will assist in serving the electric power demands of PECO's service area in southeast Pennsylvania which is tied into the PJM system serving Pennsylvania, New Jarsey, Delaware and Maryland.
Physical features. -
- a. Design crite'ria.-- Previously the NBWTP was originally designed and included.in the Comprehensive Plan to be a 20 mgd plant to be in operation in 1980, to be expanded in steps'up to 4
100-120 mgd by the year 2020. Reduced population forecasts and more detailed analyses have reduced the size of the projected plant. The applicant now proposes to construct a plant with a capacity of 10 mgd at standard filtration rate (20 mgd at high rate) with planned future expansion to 40 mgd by the year 2010. :
The water demand and the Supplemental water required from the NBWTP are shown in the following table for each ten year period of the project.
During low flow periods in North Branch Neshaminy Creek, the water treatment plant will depend on water withdrawn from the Delaware River and pumped into the headwaters of North Branch Neshaminy Creek released from North Branch Reservoir (Lake Galena), and then withdrawn by the NBWTP intake at Chalfont. .
The maximum amount of water pumped from the Delaware at Point Pleasant for public water supply (year 2010) will be 48.8 mgd with 39.5 and to be available for the NBWTP. Approximately 4 mgd is estimated for evaporative and seepage losses.
In addition, the PADER, in consultation with the Pennsylvania Fish Commission, has established special conditions in the State's water allocation perr- requiring the maintenance of streamflow 4 in the Neshaminy Creek downstream of the NBWTP, in order to conserve'and protect aquatic habitat and instream uses. The PADER conditions require maintenance of a minimum flow of 5.3 mgd .
between March 1 and June 15, and 2.75 mgd the remainder of the year. .
These PADER streamflow maintenance requirements replace stream-flow augmentation provisions incorporated in the original project, to augment Neshaminy Creek flows for water quality improvement via additional dilution. With the adoption and implementation over the past decade of more stringent treatment requirements on municipal and industrial discharges, such flow augmentation for water quality no longer appears justified. A lack of interest by and financial commitments frem communities and agencies responsible for wastewater treatment has resulted in elimination of the water quality-flow augmentation feature of the Neshaminy Basin project.
When natural flows are above the minimums specified above, up to 10 mgd (when available) will be withdrawn from Pine Run and up to 15 mgd (when available) will be withdrawn from North Branch Neshaminy Creek for the NBWTP.
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- - i D-63,-76CP (8) 5 Forecast Supplemental Water Deman'ds of i e Central Bucks and Central M'ontgomery County Areas . l Average Annual Demand, MCD ;
Service Area 1980 1990 2000 2010 i Central Bucks l Total Water Needs 13.4 17.1 19.9 . 22.6 Local Supply 10.7 12.2 14.0 15.3 Supplemental Water 2.7 4.9 5.9 7.3 1 Central Montgomery -
Total Water Needs 18.1 24.6 23.8 32.9 l Local Supply 10.8 14.1 14.1 14.1 Supplemental Water 7.3 10.5 15.7 18.8 i Tctal Supplemental Water 10.0 15.4 21.6
- 26.1 Maximum Water Demand. MGD 1980 1990 2000 2010 Ccntral Bucks -
Total Water Needs 20.1 25.6 29.8 33.9 Local Supply 17.4 18.3 20.9 23.0 Supplemental Water 2.7 7.3 8.9 10.9 C ntral Montgomery Total Water Needs 27.0 36.9 44.6 49.3 Local Supply 19.7 21.1 21.1 21.1 Supplemental Water 7.3 15.8 23.5 28.2 Tcta! Supplemental Water 10.0 23.1 32.4 39.1 9
.D-65*76CP (8) -
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. t Point Pleasant Pumping Station will also withdraw Delaware River water and di.scharge it into PECO's Bradshaw Reservoir for !
conveyance to East Branch Perkiomen Creek and use at Limerick Generating Station when necessary. The maximum quantity pumped by Point Pleasant Pumping Station for PECO has not changed and remains at 42 mgd plus 10 percent allcwance for losses or a total of 46.2 mgd. ;
- The maxinum taking rates for the Delaware River water under !
,, this revised plan frcm Point Pleasant will be as indicated in '
- the table marked Figure B attached hereto,
- b. Facilitieg.-- Structural components of the Neshaminy Water Supply System are as follows:
- 1. North Branch Water Treatment Plant A new 10 mgd standard rate (20 mgd high rate) water treatment plant will be located on a 29-acre site at the confluence of the North Branch and Pine Run. Treatment facilities will include a'5 mg finished water reservoir and a 5 mg filter wash water reservoir, three impervious sludge storage lagoons, a high lif t pumping station, a filter gallery, chemical feed and storage build-ing and auxiliary facilities. -
North Branch Intake Dam The North Branch Intake Dam wili be approximately seven feet high and would consist of four steel roller gates that will be closed under most conditions. The dam will form a pool and divert water to the raw water intake line for flow by gravity l to the treatment plant. The roller gates are designed so that they may be raised out of the channel during high flows. l Pine Run Intake Dam i
The Pine Run Dam design and operat. ion is identical to the North Branch Intake Dam, except that it will consist of '
two roller gates forming a dam approximately four feet high.
The combined amount of withdrawal at both intakes will vary depending upon the amount of treated water required for service area demands; however, the withdrawals will be coordinated with streamflow to naintain at least the minimum flow require-ments downstream of the intake facilities.
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. D-6S-76CP (8) 7 4
Rechannelization About 1500 feet of Pine Run, from its confluence !
with the North Branch of Neshaminy Creek, will be rechanneled.
This operation essentially will move a segment of Pine Run approximately 150 feet east of its present location to improve the siting characteristics of the stream and treatment plant.
Rechannelization will allow diverted water to flow by gravity into the plant by creating greater channel depth in the vicinity of the intake site.
The banks of Pine Run in the affected area will be recontoured and lined with rip-rap to prevent erosion. Similarly, the banks of the North Branch Neshaminy in the vicinity of the intake will be stabilized.
Sludge Laccons 1
Three sludge lagoons will be used to store sludge
, generated at the plant. Each lagoon will be lined.with an impervious soil blanket and have a net capacity of approximately 1,150,000 gallons at a depth of five feet and occupy a gross rectangular area of 140 x 220 feet. The expected amounts of sludge produced by the plant will be approximately 9,000 gpd when 4 .
the plant is supplying 10 mgd of treated water and 18,000 gpd of sludge at 20 mgd capacity. Solids content of the sludge is -
i estimated at five percent, accumulating at a rate of 850,000 ft /yi 3 at the 20 mgd water supply capacity.
I It is planned to include sludge dewatering equip-ment in the future based upon the actual volume and characteristics of sludge produced during initial plant operation. Construction 7
of the facility is envisioned within three years of startup and will eliminate the need for sludge lagoons, except for emergency <
purposes. The dewatered sludge produced by the treatment plant will then be hauled to an approved landfill.
Service Area Transmission Mains The finished water delivery system, consisting of
! four transmission mains varying in size and length from 18 to 36 inches and from 13,850 to 30,300 feet respectively, will radiate i to the north, south, east and west from the treatment plant.
< Municipalities will have access to the finished water at specified "take off" points.
Four transmission mains, appurtenant to the NBWTP, are planned to distribute treated water to water purveyors in Bucks and Montgomery Counties. The southern and western trans- l mission mains will be constructed initially. The northern and eastern mains will be added as the demand increases.
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.D-65-76CP (8) 8
- 2. Point Pleasant Pumping Station and Intake Point Pleasant, Pennsylvania is located on the Delaware River near the mouth of Tohickon Creek. Normally, slow moving water characterizes the river at this point, and the pumping ,
station intake will be located near the river bottom approximately J 700-feet downstream from the confluence of Tohickon Creek. The l proposed intake structure was revised as a result of the environmental review from the conventional surface intake with travelling screens to a below the surface welded screen intake. Two rows of screens will parallel the rive 2 Each row will contain 12 screens and each screen is 40 inches in diameter and 40 inches in length. The screens will be connected to a gate well on the river bank by three 42 inch diameter pipelines. A 60 inch diameter 1
pipeline will run from the gate well crossing under the Delaware Canal to the pumping station located between the Canal and Route 32. 1 l
The dredging of an entrance channel has been eliminated and the only excavation required is that for the con-struction. Future maintenance dredging should not be required.
' The revised intake structure, near the bottom of the river away from the bank, will reduce the risk of entrainment of fish, particularly of young and small species.
The pumping station will have two separate electric supply lines for emergency service. , ,
The pump capacity of Point Pleasant pumping station is designed to meet the maximum demand in the year 2010. Three of the pumps will have capacity to meet the projected maximum demand through the year 1990 13&ving the fourth pump available as standby even during maximu- canand. At that time the projected demand will be reviewed %dl 9 change in the pump capacity will be considered.
Combinec Transmisgjon Main -
A 66" diameter Combined T-ansmission Main, designed to convey the total withdrawal from the Delaware River will start from the Point Pleasant Pumping Station, cross under Pennsylvania Route 32, and traverse a relatively steep alope (22 percent grade) for 1000 feet then continue along the approx .nately 1.5 mile right-of-way_ to the 70-million gallon Bradshaw storage reservoir.
The pipeline will be pl ced below ground and construction would require blasting of rocky overburden followed by a cut and fill operation. The combined main will be capable of routing municipal supplies directly to the North Branch Neshaminy Creek via the North Branch Transmission Main or to Bradshaw Reservoir simultane-ously. A constant source of water supply will be available should the Bradshaw Reservoir be emptied for maintenance. Ester may
'q also be supplied directly to the Bradshaw pumping station for transmission to the East Branch Perkiomen if the reservoir is out of service.
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. D-6 5-76CP (8) 9 North Branch Transmission Main The North Branch Transmission Main, a 42" diameter pipeline 5,600 feet long, will extend from Bradshaw Reservoir to the eventual point of discharge to the North Branch Neshaminy Creek near the intersection of Pennsylvania Route 413 and Bradshaw Road. Design of the discharge structure includes the use of an energy dissipator to reduce the erosive effects of the discharge.
The pipeline will be constructed by the cut and fill method adjacent to Bradshaw Road through relatively undeveloped farmland.
Cost.-- The overall cost of this project is estimated to be
$34 million.
Relationship to the Comprehensive Plan.-- The Neshaminy Creek Watershed Plan was included in the Comprehensive Plan by Docket D-65-76CP, adopted by the Commission on October 26, 1966. This plan was supplemented by Docket D-65-76C.? (2), adopted January 25, ,
1967, and Docket D-65-76CP (3), adopted March 17, IS71. The NBUTP was added to the Comprehensive Plan on January 29, 1971 as described in Docket D-70-242CP.
FINDINGS .
The proposed modifications to the Neshaminy Watershed Project do not alter the main purpose of the project already part of the Comprehensive Plan. The only significant change is the decrease in the quantity of water needed to meet projected demands in the service area during the life of the project.
The proposed project is designed to relieve areas that have experienced water shortages and to provide an adequate water supply to areas that would not otherwise meet future demands.
Recent population and land use studies have projected an increase 1 in population for the service area that would, in the absence of l the proposed project, continue to use an over-subscribed ground water resource. The proposed project provides a surface water supply alternative to areas which have relied almost 100 percent on ground water.
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.D-65-76CP (8) 10 The Neshaminy Water Resources Authority regional public water supply project has been planned and designed in a manner to' encourage the orderly provision of water supply services in a manner consistent with sound conservation practices and comprehen- l sive planning in the region. Water Allocation Permit No. 0978601' issued by PADER established a continuing framework to assure imple-mentation of the project in a fashion which assures efficient use l of the water derived from the project, equitable distribution of e supplies among water supply systems and communities in the region, and detailed accounting of water distributed to various water supply systems served by the regional project Special Condition No. 9 of the allocation permit issued to NWRA requires each public water supply agency purchasing water from NWRA to apply to PADER for a
" subsidiary allocation." Policy and Guidelines for aaview of Applications for Subsidiary Allocations, as established by PADER, specify requirements for obtaining such subsidiary allocations, including:
- 1. A demonstration that water from the regional project is reasonably necessary to serve the present and future needs of the retail system;
- 2. Submission of an adequate program to encourage water conservation by residential, commercial, and industrial customers;
, 3. Implementation of an adequate, systematic program of monitoring, repair, and preventative maintenance to.
detect, correct, and, where possible, prevent leakage in transmission and distribution lines;
- 4. Review of consistency with water supply, wastewater management, environmental and comprehensive plans in the area; and
- 5. Review of any adverse environmental impacts arising from the subsidiary allocation which were not assessed as part of the overall project review and approval.
The Policy and Guidelines establish a clear procedure for submission and review of subsidiary allocation requests, including notifica-tion of DRSC, the Delaware Valley Regional Planning Commission, the respective county planning commission, other retail water systems within NWRA's service area, and affected municipalities, with the opportunity to comment and consult on the applications.
D-65-76CP (8) 11 The DRBC prepared an Environmental Assessment, in accordance with the National Environmental Policy Act of 1969 and with the DRBC Rules of Practice and Procedure, Arti'cle IV and as directed by Resolution 80-11 to determine whether an Environmental Impact Statement should be prepared for the NBWTP and to review the impacts of its related components described in DRBC's FEIS of 1973 to see if that document needed to be updated.
The assessment concluded that NBWTP would impose few significant adverse impacts on the environment and those few adverse impacts could be largely eliminated by making changes in the project.
! The assessment also concluded that subsequent documents support the conclusions of the FEIS on the Point Pleasant Diversion Plan, required by the NEPA of 1969 and issued by DRBC in February 1973, that the project is feasible and provides a beneficial use of water resources in the Neshaminy and Perkiomen Watersheds and is not detrimental to the Delaware River, provided that mitigating measures are implemented as listed in the FEIS under " Conclusions," page 3. Consequently, the final assessment recommended a " Finding of No Significant Impact" (Negative Declaration) on the NBWTP and recommended no supplementary EIS be prepared on the related components.
The water quality of the Delaware River is compatible with .
that of the North. Branch Neshaminy Creek.
Subsequent water quality data has shown that the chlorination of the Delaware River water at Point Pleasant as included in the Comprehensive Plan is not ,
necessary and it has been deleted from the project.
The full 95 mgd may not be diverted at certain times.
Diversions at Point Pleasant for water supplied to PECO is limited by the flow in the Delaware River falling below 3000 cfs (1940 mgd) at Trenton. (See conditions of Docket D-69-210CP - Final.)
A diversion of 95 mgd represents less than 5 percent of the low flow and would represent a drop in the river stage of 6/10 of one inch at the Trenton gage. ,
The applicant has agreed to cooperate with the U. S. Fish and Wildlife Service and the Pennsylvania Fish Commission to construct intakes which will equal or surpass an EPA-approved intake design. ,
The intake conduit from the Delaware River intake structure to the pumping station crosses a portion of a wetland area adjacent to the bank of the Delaware River. The intake valve chamber will be located in this wetland area. The valve chamber and proposed fill around the chamber will permanently alter less than 1/3 acre of wetland area.
The intake conduit crosses between two wetland areas and construction activity may temporarily disturb a small portion'of both wetland areas. Proper control of construction activity can minimize the impact on the wetland areas.
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D-65-76CP (8) . 12 The DRBC contracted an expert consultant to independently evaluate the blasting impacts of the proposed project. The consultant concluded that:
" ...with minor exception, the rock (argillite and diabase) will require blasting in order to install the pumping station and pipelines. However, it is our opinion that the blasting can reasonably be controlled in both rock types so as to result in no noticeable damage to the nearby structures or water wells."
The revised project does not conflict with nor adversely -
affect the Comprehensive Plan.
DECISION I. The description of the proposed project in the Comprehensive Plan is hereby revised to agree with the project as described above.
II. The project, as described above, with modifications >
specified hereinafter, is approved pursuant to Section 3.8 of the Compact, subject to the following conditions:
A. All project facilities shall be available at all times for inspection by the DRBC.
B. All project facilities shall be operated at all ,
times to comply with all requirements of the DRBC. l C. The withdrawal of water from the Delaware River at the Point Pleasant Pumping Station for diversion into the East Branch Perkiomen Creek must conform with the schedule and conditions listed in DRBC Docket D-69-210CP.
D. The withdrawal from the Delaware River shall not exceed a maximum of 48.8 mgd for use by NWRA plus a maximum of
E. The applicant shall make no wastewater discharges from these project facilities into the surface waters of the basin.
F. Sound practices of excavation, backfill, and reseeding shall be followed to minimize erosion and deposition of' sediment in streams.
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.5-65,-76CP (8) 13 G. Nothing herein shall be construed to exempt the project sponsor from obtaining all necessary permits and/or approvals from other State, Federal or local government agencies having jurisdiction over this project.
H. The project sponsor shall pay for surface water use in accordance with the provisions of DRSC Resolution No. 74-6, as amended.
I. Upon completion of construction of the approved project,.the sponsor shall submit a statement to the DRBC, signed by the sponsor's engineer or other responsible agent, i advising the Commission that the construction has been completed in compliance with the approved plans, giving the final construction cost of the approved project.
J. This approval shall expire three years from date below unless prior thereto the sponsor has expended substantial funds (in relation to the cost of the project) in reliance upon this approval. The project sponsor shall notify the DRSC, in writing, the date that construction of the project is started and the scheduled completion date within 10 days of that starting date.
K. The area served by this project is limited to the service area as described above. Any expansion beyond this area
- is subject to review in accordance with Section 3.8 of the Compact. Subsidiary allocations for any portion of the included service area shall be subject to the provisions of the PADER 4
approval as listed on page 10 hereinbefore.
L. The applicant shall cooperate with the U. S. Fish and Wildlife Service and the Pennsylvania Fish Commission to construct intakes which will equal or surpass an EPA-approved intake design criteria. Final design or the intake facility is subject to the approval of the Executive Director of DRBC.
- M. The applicant shall conduct a monitoring study on the . operation of the intake facilitics and shall take any mitigating steps that the study indicates necessary.
N. Construction excavation and maintenance-dredging in the Delaware River must be performed between November and.
March to reduce the potential for impact on migrating juvenile and adult shad.
i 0. The applicant shall monitor the fishery resource of Lake Galena and shall manage the resource in consultation with the Pennsylvania Fish Commission to maintain the best practical fishery.
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D-65-76CP (8) . 14 P. The applicant shall augment flows in North Branch Neshaminy Creek sufficient to maintain a minimum of 5.3 mgd from March 1 to June 15 and a minimum of 2.73 mgd the remainder of the year. Streamflow will be measured at the Pine Run and North Branch intakes.
Q. The applicant shall develop a program to monitor all water supply facilities including storage and distribution systems for leakagc. The program must be approved by the Executive Director and the monitoring results shall be submitted within six months of the date this project is placed in operation and thereafter as requested by the Commission. The applicant shall proceed expeditiously to correct leakages identified by the monitoring.
R. The applicant shall adopt and implement, to the satisfaction of the Executive Director, a continuous program to encourage water conservation in all types of use within the area served by this allocation permit. The applicant will report to the Commission on the actions taken pursuant to this program and the impact of those actions, on or before March 31 of each year.
S. The applicant shall monitor the ecology of that portion of North Branch Neshaminy Creek from the point of discharge at river mile 115.63 - 40.0 - 11.2 to Lake Galena on a regular basis and shall file a report every two years describing and explaining any changes that occur. In addition to the regular inspections for monitoring the ecology, the applicant saall inspect the stream banks fer erosion following any significant period of flood flows and shall prompcly correct such erosion, stabilize and revegetate exposed portions of the streambank. Corrective action taken shall be fully explained in each two-year report on the ecology. The Executive Director may curtail or suspend the operation of this project if significant ecological impacts degrade North Branch Neshaminy Creek as a result of this project. Operating schedules for pumping shall be designed to eliminate rapid fluctuations of the streamflow. .
T. Final architectural design for all above ground facilities shall be designed and landscaped to complement the surrounding environment.
U. Construction of the Delaware River intake and intake
- conduit shall be controlled to minimize the impact on existing I
wetland areas. Excavated material shall not be deposited in the wetland areas. Construction material or equipment shall not be stored in wetland areas.
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V. The applicant shall provide adequate detours during construction affecting local roads. River Road (PA.
Route 32) shall be kept open at all times.- A temporary road shall be installed when necessary to insure compliance with this require-ment. Construction of the project shall be carried out in a .
manner that will not prevent or impede the access and operation of emergency vehicles. In particular, access to and from the buildings serving emergency vehicles in the Chalfont area shall be maintained at all times.
W. The applicant shall retain an. archaeologist for the period of excavation, construction and reconstruction for the intake, pumping facilities and transmission lines. The archae-ologist shall follow the scope of work listed in Appendix No. C of the applicant's Environmental Report on this project dated February 1979. All records prepared by archaeologist shall be available to the DREC upon request.
X. The blasting shall be performed utilizing the controlled blasting techniques in close conformity with the guidelines provided in the Appendix of " Report on Evaluation of Rock Excavation and Impact of Blasting for the Proposed Point
'11easant Pumping Facilities, Point Pleasant, Pennsylvania" dated 20 May 1980, for DRBC by Converse Ward Davis Dixon, Inc.
- 1. All blasting operatiens shall be monitored with the aid of seismographs to check the limiting vibration criteria for ground and air vibrations. The vibration readings shall be taken with the aid of one or more seismographs as required on the nearest structure.
- 2. A pre-blast survey shall be conducted of all structures within 1000 feet of the blasting area to satisfy the regulations of the Pennsylvania Explosives and Blasting Laws.
- 3. Water systems and wells shall be surveyed
- prior to blasting as to their conditions and the quality and quantity of water to satisfy the regulations of the Pennsylvania Explosives and Blasting Laws. The specific capacity of all wells y
shall be determined prior to blasting.
- 4. Prior to construction, test blasts shall be monitored to determine the propagation characteristics of rock mass, and ground vibration produced at the nearest residential structure. This will help design blast charges for the project.
4 D-65-76CP (8) 16 Y. The Executive Director of the DRBC shall act as Stream Master and has authority to regulate the operation of this project. NWRA is responsible for all costs incurred by DRBC in fulfilling this obligation as Stream Master. NWRA shall arrange-for the following quantities to be recorded, in a manner acceptable to the Executive Director, in the office of the DRBC in the morning of each working day during periods of declared drought warning or drought emergency or whenever directed by the Executive Director.
- 1. The recorded daily average streamflow for the previous day in Pine Run and North Branch Neshaminy Creek j immediately downstream of the Water Treatment Plant intakes.
- 2. The recorded daily average streamflow for the previous day of the Delaware River at Trenton.
- 3. Quantity of water transferred to the North !
Branch Neshaminy Creek on the previous day.
- 4. Estimated quantity of water to be transferred to North Branch Neshaminy Creek on that day.
In addition, the applicant shall submit reports monthly, indicating all of the above quantities, the quantities withdrawn by the NBWTP, and the quantities. released from Lake Galena.
Z. For the duration of the drought emergency' declared by the Commission on January 15, 1981, or any subsequent drought emergency, water service or use by the project sponsor pursuant
, to this approval shall be subject to the prohibition.of those nonessential water uses specified in Commission Resolution No.
81-5 to the extent that they may be applicable, and to any other !
emergency resolutions or orders adopted hereafter.
BY THE COMMISSION DATED: February 18, 1981 J
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FIGURE A NESHAMINY WATER SUPPLY SYSTEM 1
\ s NEW JERSEY
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N, i f
\ PERKOMEN BRADSHAW
- PONT PLEASANT TRANSMISSON MAN RESERVOIR
\ N AND PUMP STATON PUMP STATON
\% . 1 Ts Ns \%"%p,J- os0000000 go* %COMOLNED O OO NORTil URANCH 7 Gg s TRANSMISSON MAN gPp THAtlSMISSON MAN g
'N \. /* LAKE go
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t FIGURE B Forecast Supplemental Water Needs Neshaminy Water Supply System and Philadelphia Electric Compan'f Average Daily, MGD Maximum Daily, MGD Service Area or Agency 1981 1990 2000 2010 1981 1990 2000 2010 Central Ducks County 2.7 4.9 5.9 7.3 2.7 7.3 8.9 10.9 Central Montgomery County 7.3 10.5 15.7 18.8 7.3 15.8 23.5 28.2 Minimum Flow Releases (l) 3.5 3.5 3.5 3.5 5.3 5.3 5.3 5.3 Water Supply Needs 13.5 18.9 25.1 29.6 15.3 28.4 37.7 44.4 Water Supply Withdrawal (2) 14.9 20.8 27.6 32.6 16.8 31.2 41.5 48.8 Philadelphia Electric Co.(2) 38.5(3)38.5(3)38.5(3)38.5(3) 46.2 46.2 46.2 46.'2 Total Water Requirements 53.4 59.3 66.1 71.1 63.0 77.4 f!7. 7 95.0 (1) Minimum release of 5.3 MGD shall be maintained from 3/1 to 6/15 and 2.73 MGD shall be maintained during the remainder of the year (Neshaminy Creek). ~
Average daily release for the year is 3.5 MGD.
(2) Includes 10% for water losses in transit. .
(3) Average during the pumping season (6.5 MGD average during the non-pumping season).
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