ML19351C944

Long-Range Forecast of Electric Power Needs & Requirements, Annual Suppl 1-D,1980-89, Vol 2

ML19351C944
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Site:	05000471
Issue date:	05/01/1980
From:	Damrell C, Desmond J BOSTON EDISON CO.
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ML19351C943	List: ML19351C942 ML19351C944
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Text

Aoplicants' Exhibit 21-B O Tha Commenwoolth of Massachusotts "

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ELECTRIC POWER NEEDS AND REQUIREMENTS  ;

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ansTON EDISON CCMPANY Enssums omass -

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May 1, 1980 i

i Commonwealth of Massachusetts -

Energy Facilities Siting Council 73 Tremont Street, Room 300 I Boston, Massachusetts 02108

., Re: Boston Edison Company i Supplement to Long Range Forecast 1980 - 1989 Gentlemen:

In accordance with the provisions of General Laws, Chapter 164, l

Section 69I and the Regulations of the Energy Facilities Siting Council, I file herewith Boston Edison Company's " Annual Supplement 1-D, 1980 - 1989, Volume II". This supplement updates and revises the "Long Range Forecast of Electric Power Needs and Requirements, 1976 - 1985" filed on April 30,

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i T respectfully request that this Supplement bT approved by the Council.

' Very truly yours, 4

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LONG-RANGE FORECAST 1

OF l ELECTRIC POWER NEEDS AND REQUIREMENTS )

. j Annual Supplement 1-D 1980 -1989

-f Volume II i i Pursuant to General Laws Chapter 164, Section 69I I BY BOSTO'd EDISON COMPANY

' ~l 800 Boylston Street Boston, Massachusetts 02199 i

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i Name of the Of ficer to whom Mr. C. Bruce Damrell communications should be directed Vice President with respect to this volume: Boston Edison Company 800 Boylston Street Boston, Massachusetts 02199 Legal Counsel: John J. Desmond, itI, Esq.

William S. Stowe, bq.

Boston Edison Company 800 Boylston Street Boston, Massachusetts 02199 i

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LONG RANGE FORECAST OF

,. ELECTRIC POWER NEEDS AND REQUIREMENTS

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, , ANNUAL SUPPLEMENT 1-D i

1980 - 1989 TABLE OF CONTENTS f

1 Volume I Section I Introduction And Summary Section II Electric Power Needs And Requirements 4

Volume II Section I Existing And Planned Generation Facilities j

Section II Existing and Proposed Transmission And Substation Facilities I Section III Agreements For Electric Service I

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SECTION I EXISTING AND PLANNE GENERATION FACILITIES 1980 - 1989 PAGE A. Existing Generation Facilities I-1 B. Proposed Generating Units Under 100 MW In Massachusetts I-1 C. Planned And Proposed Generating Units In Other States I-2 s

D. Exempt Or Approved Generating Units

- In Massachusetts I-2 A E. Proposed Generating Units 100 MW And Over In Massachusetts I-2

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u. F. Comparison Of Resources And Requirements, Winter and Sunsmer I-2 r

i i G. Estimates Of Total Energy Input In Primary Fuels I-2 H. Extent of Risk of Insufficient Generating Capacity I-2

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1. Planned Facility I-3

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• O INbEXOFTABLES TABLE NO. TITLE PAGE Generating Unit Availability 1-1 Fuel Forecast 1979 - 1980 I-4 E-12 Existing Generation Facilities Including Jointly Owned Units I-6 E-13 Planned And Proposed Generating Units Under 100 W in Massachusetts I-9 E-14 Planned And Proposed Generating Units In Other States I - 10 E-15 Exempt Or Approved Generating Units In Massachusetts I - 11 E-16 Proposed Generating Units 100 MW And Over In Massachusetts I - 12 l E-17 Comparison Of Resources and Requirements I - 13

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Section I EXISTING AND PLANNED GENERATION FACILITIES 1980 - 1989 A. EXISTING GENERATION FACILITIES (Forecast Page III-2)

! The Company's existing generation facilities are listed in Table E-12 of this supplement. This table revises Table E-12, Pages III-10 to 12 of the Forecast filed April 30, 1976, by changing the unit capacities to agree with the current NEPOOL ratings of the units.

j The availability data of the listed generating units as given on Pages III-2 -

and 3 of the Forecast are amended by the addition of the following data for 1978 and 1979 based on actual recent historical data.

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'[ Fossil and Nuclear Units Combustion Turbine Units

i Unit  % Availability Unit *. Availability 1978 1979 1978 1979 j l New-Boston 1 83.74 73.75 Edgar J1 99.8 97.7 j New-Boston 2 71.29 65.27 Edgar J2 60.5 80.5 L Street 0.11 66.54 L Street J1 83.7 95.0 i .

Pilgrim 83.10 89.40 Mystic J1 99.7 95.0 Mystic 4 72.85 34.32 Fram. J1 97.1 89.7 Mystic 5 33.86 74.65 Fram. J2 90.4 0.0

Mystic 6 71.27 70.90 Fram. J3 100.0 94.4

Mystic 7 74.36 86.81 Medway J1-T1 68.5 44.8 Medway J1-T2 39.3 71.3 Medway J2-T1 50.4 77.5 Medway 72-T2 86.5 68.2 Medway J3-T1 94.8 0.0 Medway J3-T2 88.8 35.2 i

3. PROPOSED GENERATING UNITS UNDER 100 MW IN MASSACHUSETIS (Forecast Page III-4)

I I The size of the fuel cell unit has been changed from 26 MW to 10 MW and the in-service date of this unit has been changed from 1982 to 1985.

' Table E-13 has been amended accordingly.

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C. PLANNED AND PROPOSED GENERATING UNITS IN OTHER STATES i (Forecast Page III-4) f

! There are no changes in this category.

D. EXDIPT OR APPROVED GENERATING UNITS IN MASSACHUSETIS .

(Forecast Page III-5)

Pilgrim Station, Unit 2, listed on page III-5 and in Table E-15 of the Forecast to be in service in 1982 is now scheduled to be in service in 1985. Although the Company is continuing in its efforts to obtain a construction permit as soon as possible, recent estt.ater made by the Company for financial planning purposes have assumed the grant of a construction permit as of April of 1981-one year from sow.

This assumption, with field construction and low power starting time

added, implies an in-service date of the unit in 1987. It is, however, l

an assumption, and not either a prediction nor an announcement.

E. PROPOSED GENERATING UNITS 100 MW AND OVER IN MASSACHUSETTS I (Forecast Page III-6)

There are no changes in this category.

! F. COMPARISON OF RESOURCES AND REQUIREMETIS, WINTER AND SLHMER (Yorecast Page III-6)

Table E-17 of this Supplement revises Table E-17 of the Forecast to

, reflect the changed forecast of total system load as shown in Table i E-11 of this Supplement. Table E-17 of this Supplement also extends the Comparison to 1989.

In the previous filings winter ratings had been used for both the summer j and winter periods as is the standard used by NEPOOL for the determination i l

of participation capability. In this filing the actual summer ratings are listed to reflect more accurately the peak load-capacity situat'.on.

f G. ESTIMATES OF TOTAL ENERGY INPUT IN PRIMARY FUELS i (Torecast Page III-7) -

l The Fuel Forecast 1976-1977 found on pages III-8 and 9 of the Fore-cast has been updated to 1980-1981 and revised in accord with the Load Forecast of Table E-11. The revised Fuel Forecast for 1980-1981 is found on Page I-3.

H. EXTENT OF RISK OF INSUFFICIENT GENERATING CAPACITY i

(Forecast Page III-19) l

!- There are no changes to this section.

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l l I. PLANNED FACILITY (Forecast Page III-20)

. The proposed oil terminal and storage facility to be located at l Mystic Station, Everett, Massachusetts was approved by the Energy Tacilities Siting Council in December 1976. The two oil tanks were

! placed into service on July 1,1978. However, the berthing facility has been deferred pending the otstcome of further Company evaluations.

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On September 21, 1979, Boston Edison Company filed Occasional Supple-1 meat to Annual Supplement 1-C where the Company requested the Energy j Facilities Siting Council's approval for the installation of a third i

250,000 barrel oil storage tank at the Mystic Generating Station. A j full description of the facility is included also in this rapplement

! starting on page I-15. The Energy Facilities Siting Council approved the additional storage tank facility on April 7, 1980.

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FUEL FORECAST 1980-1981 MILLIONS OF BTU'S 1

1 1: Sulfur #6 Fuel 011 1980 1981 l

Mystic, Electric 43,922,769 52,755,096 l New-Boston, Electric 39,181,734 40,848,395 l

' L Street, Electric 415,535 390,094

• Yarmouth 4, Electric 775,704 773,573 Total 84,295,742 94,767,158

• Edison's share is 5.8881% of total usage

1. 2 Fuel Oil 1980 1981 l

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!. Medway Combustion Turbines 270,844 270,844  ;

Framingham combustion Turbines 108,338 108,338 f L Street Combustion Turbines 54,169 54,169 Edgar Combustion Turbines 54,169 54,169 l 54,169 54,169 Mystic Combustion Turbines

! Total 541,689 541,689 TOTAL OIL' 84,837,431 95,308,847 Nuclear Fuel 1980 1981 Pilgrim I 37,076,059 41,079,904 J

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FUEL FORECAST 1980-1981 BARRELS OF OIL

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1% Sulfur #6 Fuel Oil 1980 1981 Mystic, Electric 7,110,540 8,542,087 New-Boston, Electric 6,391,800 6,663,686 j L Street, Electric 67,130 63,020

• Yarmouth 4, Electric 125,926 125,580

-r Total 13,695,396 15,394,373 l

• Edison's share is 5.8881% of total usage

1. 2 Fuel Oil 1980 1981 Medway Combustion Turbines 47,600 47,600 Framingham combustion Turbines 19,040 19,040 )

L Street Combustion Turbines 9,520 9,520 Edgar combustion Turbines 9,520 9,520 Mystic Combustion Turbines 9,520 9,520 Total 95,200 95,200 TOTAL OIL- 13,790,596 15,489,573

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Pilgrim I 340 365 e4

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TABLE E-12 Company: Boston Edison Company Nass EFSC (2/76) Filing Date: April 1, 1980 Page 1 .

EXISTING CENERATION FACILITIES INCLUDING JOINTLY OWNED UNITS BY CATEGORY Station Name Winter Susener and Site Rating Rating Type of Ownership Ownership Category Unit Numbers Location Acreage NW W Fuel Percent W*

Edgar Station Weymouth, 55.9 acres - common with Station #150  ;

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Peaking Edgar J1 15.0 12.2 011 100 15.0 Peaking Edgar J2 15.0 11.8 011 100 15.0 Y

• New-Boston /L Street Station, South Boston, 24.2 acres Base load New-Poston 1 380.0 380.0 011 100 380.0 Base Imad New-Boston 2 380.0 366.7 011 100 380.0 Base Load L Street 25.0 16.0 011 100 25.0 Peaking L Street J1 23.0 18.0 011 100 23.0 g

• Based on the winter ratings

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TABl.E E-12 Company: Boston Edison Company Mass EFSC (2/76) Filing'Date: April 1, 1980 Page 2 ,

EXISTING CEflERATION FACILITIES INCLUDING JOINTLY OWNED UNITS BY CATEGOR" Station Name Winter Susumer and Site Rating Rating Type of Ownership Ownership Category Unit Numbers Location Acreage MW MW Fuel Percent HWA P11 grim Station, Plymouth, 1621.7 acres Base I.e,o Pilgrim 1 670.0 670.0 Nuclear 100 670.0 1- 1.$tation, Everett, 47.9 acres Cyc.) l ng bystic 4a. 138.55 100.07 011 100 138.55 Cycling Hystic b

S . 145.85 104.19 011 100 145.85 Cycling Hystic C

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• 155.85 141.94 011 100 155.85 Cycling Hystic 7 591.0 574.1 011 100 591.0 Peaking Hystic J1 15.0 12.5 011 100 15.0 I

Framinghain Jets, Framingham, 45.6 acres - common with Station #240 Peaking Fram. J1 15.0 12.5 011 100 15.0 Peaking Fram. J2 15.0 12.5 011 100 15.0 Peaking Fram. J3 15.0 12.5 011 100 15.0

• Based on the winter ratings

a. Scheduled to be uprated to 145 MW (winter) and 135 MW (sunumer) by January,1981.

b. Scheduled to be uprated to 135 MW (sunumer) by January, 1981.

c. Scheduled to be uprated to 149 MW (sununer) by January, 1981. .

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TABl.E E-12 Company: Boston Edison Company Mass EFSC (2/76) Filing Date: April 1, 1980 Page 3 ,

EXISTING GENERATION FACILITIES INCLUDING JOINTLY OWNED UNITS BY CATECORY Station Name Winter Sunner and Site Rating Rating Type of Ownership Ownerchip Category Unit Numbers Location Acreage NW Mi Fuel Percent HW*

Hedway Jets Medway, 26.2 acres Peaking Hedway J1 64.0 56.5 011 , 100 64.0 Peaking Hedway J2 64.0 54.0 011 100 64.0 Peaking Hedway J3 64.0 51.0 011 100 64.0 g

Yankee Atomic Electric Company, Rowe, Massachusetts Base load Hass. Ya.ikee 175.8 175.0 Nuclear 9.5 16.70 Connecticut Yankee Atom I 1c Power Company, lladdam Neck, Connecticut Conn. Yankee 580.0 555.0 Nuclear 9.5 55.1 Base 1.oad Central Maine Power Company, Yarmouth, Maine 615.5 610.0 011 5.8881 36.24 Cycling Yarrouth 4

• Based on the winter ratings

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TABLE E-13 Company: Boston Edison Company Mass EFSC (2/76) Filing Date: April 1, 1980 PLANNED AND PRDPOSED GENERATING UNITS UN1'ER 100 HW IN HASSACHUSETTS Station Name Winter Suwner Type Type and Site Rating Rating of of In-Service Ownership Ownership Unit Number Location Acreage MW HW Fuel Service Date Percent HW Not known at this time 10.0 10.0 Gas Peaking 1985* 100 10.0 Naptha (or later)

Y Notes: *A decision as to a firm commitment for this fuel cell capacity will not be made until after complete evaluation of the demonstration unit.

Due to the experimental nature of this installation, no meaningful statement can be made as to its availab}lity.

TABLE E-14 Company: Bostos, olison Company Mass EFSC (2/76) Filing Date: April 1, 1980 PLANNED AND PROPOSED GENERATING UNITS IN ODIER STATES Station Name Winter Summer Type Type and Rating Rating of of In-Service ownership ownership Unit Number Location HW W Fuel Service Date Percent W There are no items reportable in this category for the 1980-89 time period.

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TABLE E-15 Company: Boston Edison Company Mass EFSC (2/76) Filing Date: April 1, 1980 EXDiPT OR APPROVED GENERATING UNITS IN HASSACHUSETTS Station Name Winter Summer Type Type and Rating Rating of of In-Service ownership ownership Unit Number Location HW NW Fuel Service Date Percent HW Pilgrim 2 Plymouth 1150 1150 Nuclear Base Load 1985 59.026 678.8 Y

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TABLE E-16 Company: Boston Edison Company Hass EFSC (2/76) Filing Date: Agiril 1,1980 PROPOSED GENERATING UNITS 100 HW AND OVER IN HASSACHUSETTS Station Name Winter Summer Type Type Rating Rating of of In-Service Ownership Ownership and Site Acreage HW HW Fuel Service Date Percent HW Unit Number Location There are no items reportable in this category for the 1980-1989 time period.

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TABLE E-17 Company: Boston Edison Cong.1 -

Hass EFSC (2/76) Filing Date: April 1, 1980 Page 1 COMPARISON OF RESOURCES AND REQUIRFMENTS Hegawatts Sun. Win. Sun. Win. Siin .

1980 80-1 1981 81-2 1982

1. EXISTING GENERATION FACILITIES 2784.57 2905.74 2784.57 2905.74 2784.57 INCLUDING JOINTLY OWNED UNITS

2. Planned and Proposed Generating Units under 100 MW in Hassachusetts - - - - -

3. Planned and Proposed Generating Units g

in Other States i

C 4. Exempt or Approved Generating Units in Massachusetts - - - - -

5. Proposed Generating Units 100 MW and Over in Massachusetts - - - - -

6. TOTAL PLANNED AND PROPOSED CENERAT HG UNITS

7. Scheduled Retirements - - - -

8. Capacity Purchases or (Sales) (39.4) (104.4) (104.4) (103.4) (103.4)

9. NET CAPACI'lY AVAIlABLE 2745.17 2801.34 2680.17 2802.34 2681.17

10. PROJECTED PEAK LOAD 2091 1904 2130 1936 2193

11. Reserve Capacity 654.17 897.34 550.17 866.34 488.17

12. Reserve % 31.3 47.1 25.8 44.7 22.3

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TABLE E-17 Company: Boston Edison Company Mass EFSC (2/76) Filing Date: April 1, 1980 Page 2 COMPARISON OF RESOURCES AND REQUIREHENTS Hegawatts Win. Sun. Win. Sun. Win. Sun. Win.

82-3 1983 83-4 1984 84-5 1985 85-6

1. EXISTING GENERATION FACILITIES 2905.74 2784.57 2905.74 2784.57 2905.74 2784.57 2905.74 INCLUDING JOINTLY OWNED UNITS

2. Planned and Proposed Generating Units under 100 HW in Hassachusetts - - - - - - 10.0

3. Planned and Proposed Generating Units - - -

in Other States

[ 4. Exempt or Approved Generating Units

• - in Hassachusetts - - - - - -

678.8

5. Proposed Generating Units - - - -

100 MW and Over in Hassachusetts - - -

688.8 6.TOTALPLANNEDANDPROPOSEDCENERATjHGUNITS

7. Scheduled Retirements - -

8. Capacity Purchases or (Sales) (65.4) (65.4) (80.7) (80.7) (3) (3) (35.G 2840.34 2719.17 2825.04 2703.87 2902.74 2781.57 3559.04

9. NET CAPACITY AVAILABLE 1989 2233 2016 2277 2054 2332 2104

10. PROJECTED PEAK LOAD

11. Reserve Capacity 851.34 486.17 809.04 426.87 848.74 449.57 1455.04 42.8 21.8 40.1 18.7 41.3 19.3 69.2

12. Reserve %

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TABLE E-17 Company: Boston Edison Company Mass EFSC (2/76) Filing Date: April 1, 1980 Page 3 .

COMPARISON OF RES0dRCES AND REQUIREMENTS Hegawatts Sun. Win. Sum. Win. Sun. Win. Sun. Win.

1986 86-7 1987 87-8 1988 88-9 1989 89-90

1. EXISTING CENERATION FACILITIES 2784.57 2905.74 2784.57 2905.74 2784.57 2905.74 2784.57 2905.74 INCLUDING JOINTLY OWNED UNITS

2. Planned and Proposed Generating 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 Units under 100 MW in Massachusetts

3. Planned and Proposed Generating - - - - - - - -

Units in Other States H 678.8

,8 4. Exempt or Approved Generating 678.8 678.8 678.8 678.8 678.8 678.8 678.8

• Units in Hassachusetts Proposed Generating Units - - -

5. - - - -

100 MW and over in Hassachusetts

6. TOTAL PLANNED AND PROPOSED GENERAfflNG 688.8 688.8 688.8 688.8 688.8 688.8 688.8 688.8 UNITS Scheduled Retirements

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8. Capacity Purchases or (Sales) (35.5) (28.0) (28.0) (28.0) (28.0) (28.0) (28.0) (28.0)

9. NET CAPACITY AVAILABLILTY 3437.87 3566.54 3445.37 3566.54 3445.37 3566.54 3445.37 3566.54 l 10. PROJECTED PEAK IDAD 2374 2137 2424 2181 2482 2236 2534 2282

11. Reserve Capacity 1063.87 1429.54 1021.37 1385.54 963.37 1330.54 911.37 1284.54

12. Reserve % 44.8 66.9 42.1 63.5 38.8 59.5 36.0 56.3 g

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- PLANNED FACILTY l

ADDITIONAL MJEL OIL STORAGE FACILITT MYSTIC STATION, EV15tETT, MASSACHUSETTS The request for the Energy Facilities Siting Council's approval of this facility was filed on September 21, 1979 as an Occasional Supplement to Boston Edison Company's Annual Supplement 1-C, EFSC Docket 79-12A.

On January 25, 1980 Boston Edison Company filed an amendment to the Occasional j Supplement. The amendment contained an explanation why the physical location i j , of the proposed fuel storage facility should be changed from the originally l

' - proposed location.

The currently desired in-service date for this project is June 1,1981. The description of the facility and the amendment appear on the following pages.

The Energy Facilities Siting Council approved this facility on April 7,1980.

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PLANNED FACILITY A. Tacility Identification l Additional Fuel Oil Storage Facility Mvstic Station, Everett, Massachusetts B. Facility Description Boston Edison Company proposes to install an additional fuel oil storage facility at Mystic Station in Everett. The current estimated cost for the project is ,$4,080,000. The proposed facility would increase the pres-ent on site oil storage capacity by 250,000 barrels or from 590,000 barrels to 840,000 barrels. This capacity increase would improve Company's average number of days of maximum on site storage from 29 days tc 41, days.

This increased inventory will substantially assist in mitigating

~{ problems the Company has experienced resulting from tanker delivery i

delays. It will also provide additional protection against ex-hausting the supply of fuel at Mystic Station. In the unfortunate event c' . station shutdown due to exhaustion of fuel supply, replacement power costs, presently estimated to be $90,000 for an average load day and as high as $250,000 for a peak load day, could be encountered.

The project is proposed basically as insurance against the fuel sup-r ply and delivery schedule uncertainties of the Lunediate and fore-seeable future. In addition, it will provide the opportunity to l improve the dollar average cost of fuel oil since additional storage capacity will be available for spot purchases.

The proposed oil storage faci.ity would be located in an area east of the existing 345kV switchyard. The tank will be a standard API welded steel above ground tank with a steel dike. Tank size will be 178 feet diameter and 56 feet high. Tank dike will be 252 feet diameter by 28 feet high.

The installation will include tank and dike foundations, steam and oil piping, fire protection systems, lighting and power supply. Fuel oil tanks and associated piping will be suitably insulated.

The fuel oil tank will be equipped with remote reading tank level and temperature instruments similar to the existing tanks.

A 24" oil delivery line will be extended from the existing tank farm

^ to the new tank. The new storage tank will be interconnected with the existing fuel oil storage tanks by piping.

The Company would plan to commence construction of this facility as soon as practicable so that the project can be completed by the spring of 1981.

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C. State / Federal Agency Jurisdiction i State Agencies

1. Executive Office of Environmental Affairs */

Determination of requirement for Envirocnental Impact Report (EIR) in accordance with the regulations governing the implementation of the Massachusetts Environmental Policy Act (MEPA), M.G.L.C. 30 l Sections 62 through 62H.

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2. Department of Public Safety Permit to construct tank and maintsin oil storage under M.G.E.C. 148, Sections 9, 13, 23 and 37.

D. Environmental Impact f

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The proposed facility would be located in a highly industrialized area and would not change the character of land use in the area. Oil storage j

and delivery facilities are already located in this part of Everett and

> I on the Mystic River.

1 E. Alternatives There is no practical alternative to the proposed facility which would provide the same expected benefits of this proposed facility at the same or lower cost.

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If the facility were not built, the Company would be deprived of an op-l portunity to provide protection against uncertainties of fuel deliveries j and/or exhaustion of fuel supplies.

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If the facility were built elsewhere than at the Mystic Station site, it I

r would be more costly and would net provide any significant non-monetary

benefits.

• / Note: The Certificate of the Secretary of Environmental  ;

Affairs on Environmental Notification Form was issued September 5, 1979 with the determination that the project does not require an Environmental Ispact Report.

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1/25/80 EFSC 79-12A (Mystic 011 Storage Tank)

PROPOSED NEW LOCATION OF THE ADDITIONAL 250,000 BBL FUEL OIL STOMGE FACILITY Upon completion of the soil investigation from borings taken in the originally proposed location for the fuel oil storage facility, our soil consultant, Geo-technical Engineers have advised us that the soil conottions benea% that lo-

, cation are poor and that it would require an estimated tdditional expenditure of $300,000 to construct a suitable foundation for the tank. The new foundation

,  ! scheme will also require additional 2 to 3 months in construction schedule.

Alternate scheme to build the tank on the present location, utilizing pile foun-dation would be even more expensive and could cost. as high as $2,000,000. Geo-technical Engineers have recommended that the present tank location be moved

. approximately 115 f t. northward. The preliminary soil investigation indicates that the soil conditions in the new location are such that they would not warrant i any additional tank foundation costs. We have evaluated this alternative and have determined that moving the present location to approximately 115 ft. north is more economical than building the tank at the present location.

I The new location would still meet the zoning criteria required under the Depart-j- ment of Public Safety regulations.

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4 SECTION II EXISTING AND PROPOSED TRANSMISSION AND SUBSTATION FACILITIES

... 1980 1989 Page A. Transmission Lines in Massachusetts II-l 1

l L Bulk Power Substations in Massachusetts II-2 j TABLES AND FACILITY DESCRIPTIONS l E-18. Existing Transmission Lines in Massachusetts II-3 l i E-19. Exempt or Approved Transmission Lines II-13 i

, Walpole-Needham 345kV Overhead / Underground Line II-15  ;

Mystic-Lincoln Street 345kV Underground Line II-16  ;

j Woburn-Tewksbury 345kV Overhead Line II-17 j Hyde Park-Dewar Street 115kV Underground Line II-18 E-20. Proposed Transmission Additions in Massachusetts II-19 Woburn to Waltham 345kV Overhead Line II-20

, Needham to Newton-West Roxbury Area 345kV Line II-21

• Reading Area Supply 11-22 t West Roxbury-Dedham 115kV Underground Line II-23 l l' I E-21. Existing Bulk Power Substations in Massachusetts 11-24 E-22. Exempt or Approved Bulk Power Substations in Massachusetts 11-28 Lincoln Street, Boston II-29

. E-23. Proposed Bulk Power Substations in Massachusetts II-30 Bingham Road, Dedham - II-31

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EXISTING AND PROPOSED TRANSMISSION AND SUBSTATION FACILITIES 1980 - 1989 The transmission and substation facilities proposed in the Forecast, filed April 30, 1976, have been reviewed to incorporate the latest available infor-mation regarding each facility. The most recent information was obtained and new projections made of expected future requirements taking into consideration revised in-service dates of other transmission and generation facilities. As a result of this review and the placing in-service of those facilities scheduled for 1979, the project listings of the Forecast and Annual Supp12 ment 1-C are changed as follows:

A. TRANSMISSION LINES IN MASSACHUSETTS (Forecast Page IV-1)

Since the filing of Annual. Supplement 1-C,115kV line 451-537 has been i reconductored on a temporary basis by the utilization of the existing unenergired Plymouth-Holbrook 345kV line conductors between Whitman Station #451 and Holbrook Station #478. Table E-18, Existing Trans-

, mission Lines in Massachusetts and Table E-19, Exempt or Approved Trans-mission Lines have been revised to incorporate this change. Table E-19 has been further revised to include: tuo 115kV pipe cable circuits from the existing 115kV pipe cable circuita along Columbus Avenue to the new AMTRAK traction power substation on Mindoro Street, Roxbury; one 115kV i circuit from the existing 115kV overhead Sharon-Canton line to the new AMTRAK traction power substation in Sharon; and changes of in-service dates for six lines listed previously in Table E-19.

- The new facility identified as an area supply problem for the Holbrook area has been removed from Table E-20, Proposed Transmission Additions N in Massachusetts. A detailed study revealed that the Holbrook area supply problem can be solved most effectively by the installation of a second 345/115kV autocransformer at Holbrook Station #478 when it will become necessary. However, another new facility has been added on Table E-20 as an identification of an area supply problem- the Reading area. The revision of Table E-20 also reflects a change of in-service date for the West Roxbury-Dedham 115kV pipe cable circuits from 1985 to 1986.

The Medford to Arlington 115kV Unoerground Transmission Line has been

_' removed from Table E-20 because this facility will not be required within the next ten yp.n s. In this time period, barring unpredictable developments, new load recuirer ancs in the Arlington area can be satis-I fied by the insta11atir of additional 14kV circuit (s) from Woburn Station #211.

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B. BULK POWER SUBSTATIONS IN MASSACHUSETTS (Forecast Page IV-2)

Since the filing of Annual Supplement 1-C, no bulk power substations or major additions to existing substations have been placed into service.

Table E-22, Exempt or Approved Bulk Power Substations in Massachusetts

!. has been revised to indicate changes in the required in-service dates of i two substations: West Central Street, Natick from June 1984 to June 1985; and Chatham Street, Boston from June 1985 to June 1986. Table E-23, Proposed Bulk Power Substations in Massachusetts has been revised to indicate that the in-service date of the Bingham Road, Dedham Substation has been changed from 1985 to 1986. The East Arlington 115/13.8kV .

Substation has been removed from Table E-23 because this facility will not be required within the 1980-1989 time period.

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TABLE E-18 .

Company: Boston Edison Company .

Mass EFSC (2/76) Filing Date: April 1,1980 Page !

EXISTING 1RANSMISSION LINES IN HASSACllUSETTS Length in Miles

• Type of On Structures on Structures

• Size of Con- Nominal Line Supporting of Line of Another Underground ductor (kemil) R/W Ntaber From To Structure Designated Line Circuit and Material Width (ft.)

345kV Transmission Lines 1

303 W. Medway W. Hedway Wood 0.10 2-900 Station Alum. Yard Sta. #446 (11 Frame) C 316 Holbrook Walpole Steel Tower 14.6 - -

2-1590 150 Sta. #447 ACS t Sta. #478 E Us 325 W. Hedway W. Walpole Steel Tower 9.62 2500 300

" ACSR Sta #446 Sta. #447 B 2

Steel Tower 0.65 2500 300 331 W. W. inole W. Walpole Tower 5 ACSR Sta. #447 B 335 Whitman llolbrook

! Stect Poles 7.30 2-1590 150 to 250 Sta. #478 ACSR Sta. #451 B 3

Ma s s. -R . I . Wood 16.33 2-1024 300 336 W. Medway ACSR Sta. #446 Line (11 Frame) C Wood 6.2 - -

21954 250 337 Woburn Billerica (11 Frame)'A ACSR 300 Sta. #211 4

Plymouth Steel Tower 7.30 2-1703 300 342 Pilgrim ACSR Sta. #650 ' sake 11111 Road B Whitman Steel Poles 25.85 2-1590 300 Plymouth Jordan Road Sta. #451 B ACSR

7--- . .

TABI.E E-18 Company: Boston Edison Company Hass EFSC (2/76') Filing Date: April 1, 1980 Page 2 EXISTING TRANSHISSION 1.INES IN HASSAcilUSETTS Length in Miles

• Type of On Structures On Structures Size of Con- Hopinal Line Supporting of Line Of Another Underground doctor (kemil) R/W Number Froan To Structure Designated Line Circuit and Haterial Width (ft.)

345kV Transmission Lines 5

344 W. Medway W. Walpole Steel Tower 8.93 2-1703 300 Tower 6 ACSR Sta. #446 B 346 Woburn No. Cambridge Underground 6.02 2500 -

Sta. #211 Sta. #509 Cu.

g Y 11 7.30 2-1703 300 e 355 Pilgrim Plymouth Steel Tower ACSR Sta. #650 Snake 11111 Road B 6

357 W. Medway Hilford/Hedway Wood 1.83 2-900 375 to 410 Sta. #446 1.i ne (11 Frame) C I

319 Woburn I.exington Wood 8.24 2-1113 250 Sta. #211 Sta. #320 (11 Frame) A ACSR

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TABLE E-18 Company: Boston Edison Company Hass EFSC (2/76) Filing Date: April 1, 1980 Page 3 .

EXISTINC 1RANSHISSION Lil(ES IN HASSACilUSETTS Length in Miles

• Type of On Structures on Structures Size of Con- Nominal Line Supporting Of Line Of Another Underground ductor (kemil) R/W Number From To Structure Designated Line Circuit and Material Width (ft.)

358 Everett Cambridge Underground 4.96 2500 -

Sts. #250 Sta. #509 Cu.

389 W. Medway W. Walpole Wood Structures 9.57 2-954 300 Sta. #446 Sta. #447 (11 Frame) C ACSR g

230kV Transmission 1.ines Y

u 7 240-601 W. Hedway Lelami Street Steel Tower 10.39 1113 250 Sta. d446 Sta. #240 B ACSR Wood O.57 (11 Frame) C 282-602 W. Hedway Waltham j Steel Tower 10.39 1113 250 Sta. f446 Sta. #282 B ACLR Wood 7.26 250 =

(11 Frame) C Steel Tower 7.19 82.5 115kV Transmission Lines 282-507 Sudbury Ring Waltham Ring Steel Tower 7.19 350 82.5 Sta. #282 Cu. liy-T Sta. #342 B 478-502 Elgar Ring llolbrook Ring Steel Tower 5.91 2-4/0 150 X6Y Sta. #150 Sta. #478 B Cu.

478-508 Ligar Ring llolbrook Ring Steel Tower 5.92 795 150 478-509 Sta. #150 Sta. #478 B 5.92 ACSR

TABl.E E-18 Company: Boston Edison Company Mass EFSC (2/76) Filing Date: April 1, 1980 Page 4 EXISTING TRANSHISSION LINES IN HASSACllUSh"ITS length in Miles

• Type of On Structures on Structures Sir.: of on- Nominal Line Supporting Of Line of Another Underground ductor (kemil) R/W i Number From To Structure Designated Line Circuit and Material Width (ft.)

447-508 Ilolbrook Ring Walpole Steel Tower 13.98 795 150 447-509 Sta. #478 8 13.98 ACSR 447-508 Sharon Canton Steel Pole 1.44 795 150 447-509 Tower 110A Sta. #470 B&D 1.44 ACSR 447-508 Sharon horwuod Wood 1.04 795 210 g 447-509 Tower 116A Sta. #495 (11 Frame) A 1.04 ACSR Y

os 146-502 W. Walpole Walpole Steel Tower 0.67 4/0 300 Sta. #447 Sta. #146 B Cu, 447-508 Walpole W. Walpole 0.67 477 Sta. #146 Sta. #447 SSAC 447-509 Walpole W. Walpole Wood 0.64 795 300 Sta. #146 Sta. #447 l C&D ACSR 398-536 Ilolbrook Ring llolbrook Wood 1.17 795 150 to 250 ,

Sta. f478 Sta. #398 (H Frame) C ACSR 18 451-537 Ilolbrook Ring Whitman Wood 5.80 350 150 to 250 Sta. #478 (11 Frame) C Cu. Ily-T 65-502 W. Walpole Hedway Ring Steel Tower 9.32 2-4/0 300 X&Y Sta. #447 Sta. #65 B Cu.65-508 W. Walpole Medway Ring Wood 9.66 4/0 300 Sta. #447 Sta, f65 (11 Frame) C Cu. Ily-T 240-507 Hedway Ring Leland Street Wood 10.72 4/0 250 a

240-508 Sta. #65 Sta. #240 (11 Frame) A 10.72 Cu,

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TABI.E E-18 ,

Company: Boston Edison Company -

Hass EFSC (2/76) Filing Date: April 1, 1980 Page 5 EXISTING 1RANSHISSION LINES IN HASSACllUSETTS ,

. I.ength in Miles

• Type On Structures On Structures Size of Con- Nominal I.ine Supporting Of Line Of Another Underground ductor (kcall) R/W Number From To Structure Designated Line Circuit and Haterial Width (ft.)

240-507 Sherborn Western Avenue Wood 0.54 795 100 Sta. #274 (11 Frame) C Alum.

240-508 Sherborn Western Avenue Wood 0.33 4/0 250 Sta. #274 (H Frame) C Cu.

9 201-501 Medway Ring Hilford Steel Tower 2.02 795 375 to 410 Sta. #65 A Alum.

H 10 Y 201-502 Medway H11 ford Steel Tower A 2.01 795 375 to 410

" ACSR 11 211-503 Billerica Woburn Ring Steel Tower 6.24 300 250 to 300 12 211-504 Sta. #211 A 6.24 Cu.

211-503 Burlington Woburn I Wood 3.88 795 250 l

l 211-504 Sta. #375 (11 Frame) A 3.88 ACSR 13 211-503 Woburn Reading Single Pole 1.41 795 150 13 211-504 A 1.41 ACSR 110-522 Baker Street Needham Single Pole 3.81 2-954 100 240-510 Sta #110 Sta. #148 8 3.81 Alum.

240-510 Needham Leland Street Wood (Il Frame) C 9.15 795 ACSR 100 Sta. #148 Sta. #240 (Wichhone) C & Alum.

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TABl.E E-18 Company: Boston Edison company Hass EFSC (2/76) Filing Date: April 1, 1980 Page 6 EXISTING TRANSHISSION LINED IN HASSAcilUSETTS Length in Miles

• Type of On Structures On Structures Size of Con- Nominal Line Supporting Of Line Of Another Underground ductor (kcall) R/W Number From To Structure Designated Line Circuit and Material Width (ft.)

320-507 Waltham Ring Lexington Ring Wood 5.21 4/0 250 320-508 Sta. #282 Sta. #320 (11 Frame) A 5.21 Cu.

342-507 Speen Street Sudbury Ring Wood 3.49 350 250 Sta. f 433 Sta. #342 (11 Frame) A Cu. Ily-T 433-507 Leland Street Speen Street Wood 4.31 350 250 Sta. #240 Sta. #433 (11 Frame) A Cu. Ily-T U

i 455-507 Western Ave. W. Framingham Single Pole 5.75 795 100 Sta. #274 Sta. #455 A&D ACSR 14 513-507 W. Framingham Southboro Single Pole D 0.95 795 100 Sta. #455 Wood (11 Frame) C ACSR I

148-522 W. Walpole Needham Wood 9.42 2-795 250 Sta. #447 Sta. #148 (11 Frame) C Alum.

Underground . 1.31 2-1250 -

Cu.

211-508 Burlington Woburn Wood 3.74 1113 250 Sta. #391 Sta. #211 (11 Frame) A ACSR 391-508 Ilartwell Ave. Burlington Wood 2.64 1113 250 Sta. #533 Sta. #391 (11 Frame) A ACSR 533-508 Lexington llartwell Ave. Wood 1.90 1113 ,250 Sta. #320 Sta. f533 (11 Frame) A ACSR

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o TABLE E-18 Company

Boston Edisun Company Mass EFSC (2/76) Filing Date: Apri' 1, 1980 Page 7 EXISTING 1RANSHISS10H I.INES IN HASSACll0SEITS Length in Miles

• Type of On Structures' on Structures Size of Con- Nominal 1.ine Supporting Of Line of Another Umlerground doctor (kcmil) R/W Hum.ber From To Structure Designated Line Circuit and Haterial Width (ft.)

15 250-518 Everett Revere Single Pole C 2.01 795 Alum.

Mystic #250 Everett Underground 0.22 2250 Cu. -

110-510 Brighton Ring Baker Street Underground 6.71 1250 -

110-511 Sta. f329 Sta. #110 6.71 Cu. -

110-510 K Street Kingston Street Underground 2.12 3500 g

H 110-511 Sta. #385 Sta. #514 2.11 Alum. -

110-510 Kingston St. Colburn Street Underground - -

3.44 3500 110-511 Sta. #514 Roxbury - -

3.44 Altun. -

110-510 Colburn St. Coissonwealth Ave. Underground - - 2.10 1750 110-511 Roxbury Brighton 2.10 Alum. -

211-506 Mystic Woburn Undergrousul 7.8L 500 -

Sta. #211 Cu.

Sta. #250 211-514 Mystic Woburn Underground 7.72 1250 -

Sta. #211 tu.

Sta. #250

7__ 7-TABLE E-18 Company: Boston Edison Company Hass EFSC (2/76) Filing Date: April 1, 1980 Page 8 EXISTING TRANSHISSION LINES IN MASSAcilUSETTS Length in Miles

• Type of On Structures on Structures ~~ Size of Con- Nominal 1.ine Supporting Of Line Of Another Underground ductor (kcpil) R/W Number From To Structure Designated Line Circuit and Haterial Width (ft.)

250-516 Hystic K Street Underground 5.16 12$0 & 2250 -

250-517 Sta. #250 Sta. #385 5.16 Cu.

282-521 Brighton Ring Waltham Ring Underground 7.42 1250 -

282-521 Sta. #329 Sta. #282 7.42 Cu.

292-522 Baker Street Newton IIginds Underground 3.73 1250 -

292-523 Sta. #110 Sta. #292 3.73 Cu.

g Y Brighton Ring Underground 4.57 1250 -

gg 329-510 Hystic 329-511 Sta. #250 Sta. #329 4.51 Cu.

329-512 Brighton Ring K Street Underground 6.64 1500 & 2250 -

Sta. #385 6.64 Cu.

329-513 Sta. f329 Underground 2.85 2250 -

329-530 Brighton Ring Cambridge {

Sta. #509 2.85 Cu.

329-531 Sta. #329 416-526 Sudbury Ring Haynard Underground 6.52 1250 -

Sta. #416 6.52 Alum.

416-527 Sta. #342 496-528 Baker Street Ilyde Park Underground 3.53 - 3500 -

496-529 Sta, #110 Sta. #496 3.53 Alum.

Underground 2.64 2250- -

483-524 K St., S. Bos. liewar Street 2.64 Cu.

483-525 Sta. #385 Sta. #483 16 423-515 Hystic Everett Underground 0.31 1250 -

Cu.

Sta. #250

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TABLE E-18 Company: Boston Edison Compa. y Mass EFSC (2/76) Filing Date: April 1, 1980 Page 9 .

EXISTING TRANSHISSION I*INES IN HASSACilUSE'l'IS

• Length in Miles

• Type of on Structures On Structures Size of Con- Nominal Line Supporting Of Line Of Another Underground ductor (kcmil) R/W To Structure Designated Line Circuit and Material Width (ft.)

Numlier From Underground 0.22 2250 -

.f 400 Unit #1 New Boston K Street Co.

X&Y cables Sta. #400 Sta. #385 -

f 400 Unit #2 New Boston K Street Underground 0.15 2250 -

Cu.

Sta. f400 Sta. f385

1. 4 Transf. L Street K Street Underground 0.36 1250 -

g Sta. f385 Cu.

y 110A Sta. f4 0.36 p #4 Transf.

Ilon

1. 4 Transf. L Street K Street Underground 0.38 1250 -

Sta. #385 Cu.

C & 110D Sta. #4 I

A Separate Structure s Distances are for Boston Edison Co. ownership B Double Circuit C Single Circuit

. D Davit Arms

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NOTES ON EXISTING TRANSHISSION LINES IN HASSACilUSE"rTS

1. Remaining 36.93 miles to Brayton Point owned by others .

2. Remaining 53.25 miles to Canal Station owned by others

3. Remaining 0.22 miles to Sherman Road Station owned by others

4. From cnake 11111 Boad to Canal Station owned by others

5. From .c wer 6 to Bridgewater Station owned by others

6. Remaining 15 miles to Hillbury Station owned by others

7. *11. 1 9 line continues approximately 2.5 miles beyowl Station #240 to Route 9, Framinghain tar is not energized between these two points

8. Remaining 1.34 miles beyomi structure 15 to Station #451 owned by others h 9. Connects to NEPeo. Cir D-130 at Hedway/H11 ford Line U BEco. owns the section in Hedway only 10.

11. Connects to NEPCo. Cir H-139 at Billerica Line

12. Connects to NEPCo. Cir N-14y at Billerica Line

13. Connects to Reading Municipal at Woburn/ Reading Line

14. Connects to NEPCo. Line D-156 at Southborough Framingham Line

15. Additional 1,72 miles in Revere and Everett are owned by NEES

16. The remainder (1.65 miles) to Station #423 is owned by others

17. From Snake 11111 Road to Bridgewater Station owned by others

18. Line 451-537 has been temporarily reconductored by utilizing a portion (7.42 miles) of the existing unenergized Plymouth-liolbrook 345kV line conductors at Il5kV between Whitman Station #451 and IIolbrook Station #478.

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TASI.E E-19 , Company: Boston Edison Company Filing Date April I, 19:10 Mass EFSC (2/16)

Page i EXIMPT OR AFFROVED DIANSHISSION LINES e

Circuit lanath In Miles Stae of Type of on Structures on Structures Conductor Nominal In-Line Supporting New or of Line of Another Underground (kcall) R/W Service Enleer From To Structure Nebuilt Deslaneted Line Ciscuit and Nterial Widtt(ft) Date 345 kV Transmission 1.ines W. Walpole Needhae I Wood New 9.4 2-Ill) 250 As soon 356 as ACSR Sta. #447 Sta. #148 (N Frame) A

& kJerground 1.3 2500 Co. possible Plymouth Notbrook Steel Poles New 33.2 2-1590 150-250 Feb., 1985 N/A ACSR f Jordan Rd. Sta. #478 s 3

Lincula Street Usedergrousul 4.0 2500 June, 1986 N/A Mystic Sta. #250 Best enn Co.

W burn Ring Teuksbury 3Wood 6.2 2-954 250-300 Juac, 1986 N/A (H Frame) ACSR Sta. #211 I

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e t & e TABLE E-19 Cumpaava Boston Edison Company .

h as EFSC (2/76) Filleg Dates April 1, 1980 Page 2 EIDerf OR APrit0VfD 1RANSMISS10ef LINES ,

circuit Lesenth In Miles Sise of Type of On Structures On Structures Coseductor Numinal in-Line Supporting 18ew or of Line of Another Undergrouet (kcmil) 5/W Service leumbe r From To Structure Bebuilt bestanated Line Circuit and hterial Widtis(f t) Date 115 kV Transmission Lines 150-510 Culumbus AN1RAK Underground New 0.04 750 - Oct., 1983 110-518 Ave. Tap Rostasty 0.04 Alism.

N/A Sharon - AMTRAK Steel Fole New 0.04 795 150 June, 1983 Canton Line Sharon C ACSE a 433-507 Framingham Speen St. Wood Rebuilt 4.38 785 150 June, ISS)

Y Sta. 8240 Sta. 8433 (M-Frame) A SSAC T

N/A HyJe Park Dewar St.3 underground New 5.3 1750 - As soon as N/A Sta. #4% Sta. 8483 5.3 Alum. Possible N/A Flymoutta k nomet Underground New 2.5 750 - May, 1984 Sta. #f>50 Hanuset Alum.

N/A Congress St. Chatham St Underkroused New 0.19 1750 - Apr il, 19%

N/A Boston Rosson 9.19 Alum.

A Separate Structure C Single circuit E thaal Voltage 5 Double Circuit D Davit Arms N/A sent assigned Notes

8. Monte and type of constrisction approved ley EFSC in notice of final decinton, 3 IMatSC_, alated December 1,1975.

Timing of this facility has been approved "as soon as possible".

2. Conductors have been Installed but have snot twen connected to 345 kV terminals. A portion of tleese casuluctors (7.42 miles) is uttilzed at il5kV between laitta.an Station #451 and Holbrook Station #478.

3. Routu and type of construction approved by EFSC in decielon, 2 DOHSC 58, dated December 21, 1977. The LFSC entanblished an lassiMiate fin-service date by elecision of April 7,1980.

4. The dintance shoun is f rem Station #281 to bar lington-BLlierica baumulary. New Esigland Liectric Syntem is to cons t reer t seemt enas alw line 1.cyoeul tisat tai t ee t .

. o WALPOLE TO NIEDHAM 345kV Overhead Transimssion Line (Torecast Page IV-14)

Boston Edison Company proposes to construct a 345kV transmission line between Station #447 in Walpole and Station #148 in Needham. This line was approved as to general need and site in the December 1,1978 decision of the Energy Facilities Siting Council and was approved for an in-service date of as soon as possible in the September 18, 1979 decision. It will be constructed as a

" mirror image" to an existing 115kV line along the same general route. This transmission line is projected to cost $12,360,000 in 1985 dollars.

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- MYSTIC TO LINCOLN STREET 345 kV Underground Transmission Line (Forecast Page IV-24)

The siting, general need and projected cost of this facility was approved by the Energy Facilities Siting Council in its decision (2 DOMSC 58) of December 21, 1977.

The in-service date of this line is scheduled for June, 1986 with construction projected to rtart in 1985. The estimated cost of this line, excluding esse-

' ments and legal fees, in 1986 dollars, is approximately $8,500,000.

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- WOBJRN TO TEWKSBURY 115 kV AND 345 kV Overhead Transmission Line (Forecast Page IV-30)

I There is no change in the description of this facility since April 1, 1979.

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HTDE PARK TO DEWAR STREET 115 kV I

Underground Tranmission Lines (Forecast Page IV-39)

The siting, general need and projected cost of the 115 kV underground transmission lines were approved by the Energy Facilities Siting Council in its decision of December 21,1977 (2 DOMSC 58). These lines are required c no later than the proposed 345kV line from Walpole to Needham in order to

! support power flows carried into the Boston area by that line. The in-

' service date of "as soon as possible" was approved for the 345kV line by the Energy Facilities Siting Council in its decision of September 18, 1979.

Based on that decision the Company is requesting the approval of an in-l service date of as soon as possible for the Hyde Park to Dewar Street, Dorchester 115kV lines. The cost of this project in 1985 dollars is estimated at $7,375,000.

On April 7, 1980, the Energy Facilities Siting Council adopted a decision establishing an 1:nmediate in-service date for this line.

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,. s TABLE Fe20 Company: Boston Edison Com'pany Hass EFSC (2/76) Filing Date: April 1, 1980 PROPOSED MANSHISSION AI)DITIONS IN HASSACilUSETTS Circuit LenRth in Miles Size of Type of On Structures On Structures Conductor Supporting Of Line Of Another Underground (kcmil) In-Service From To Structure Designed Line Cl cuit and Material Date 345 kV Transmission Lines Woburn Ring Waltham Ring Wood 13.4 2-1113 1986 Sta. #211 Sta. #282 (ll-Frame) ACSR Needham Newton - Unknown Unknown Unknown 1987 g

y Sta. #148 West Roxbury y Area 115 kV Transmission Lines Reading Area Supply Unknown Unknown Unknown 1985 Undergrouixt I 2.9 1750 1936 W. Roxbury Dedham Sta. #110 2.9 Alum.

1 . .

l , WOBURN TO WA1.TBAM 115 kV AND 345 kV t .

Overhead Transmission Line (Forcast Page IV-34) i There is no change in the description of this line since April 1, 1978.

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NEEDHAM 'IO NEWION-WEST ROX3URY AREA 345 kV LINE There is no change in the description of this line since April 1. 1978.

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II-21

READING AREA SUPPLY A supply problem has been identified in what will be referred to as the Reading J Area. The Area loads consist of the Town's of Reading Station #494 and the J

, Boston Edison Company's North Woburn Station #375. These stations are currently ,

f supplied by a pair of overhead 115kV transmission lines which are tapped to 115kV j lines 211-503 and 211-504. The latter extend from the Boston Edision Company's 1 Woburn Station #211 to the New England Electric System's Tewksbury Station #217. l Initial indications are that the capacity of the existing transmission supply lines will become inadequate for reliable supply of the area load at some point in the r mid-1980's. The Company is now is the process of identifying and analyzing long-

! term solutions. Among the alternatives which are being studied are: (1) recon-ductoring 211-503 from Woburn Station to Tewksbury Station, (2) installing a new double-circuit 115kV line in place of 211-503 from Woburn Station to the Burlington cap point (approximately one-third of the total distance from Woburn Station to Tewksbury Station), and (3) installing a new, single circuit 115kV line in place of 211-503 from Woburn Station to Tewksbury Station.

f i Additonal details on the economics and the effectiveness of the alternatives will be made available in subsequent filings as this problem is further evaluated.

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. WEST ROXBURY TO DEDHAM 115 kV Underground Transmission Lines (Forecast Page IV-52) l The in-service date of this project has been changed from 1985 to 1986. The estimated cost of this project will be approximately $5,260,000 in 1986 dollars.

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3 g o TABLE E-21 Company: Boston Edison Company .

Mass EFSC (2/76) Filing Date: April 1, 1980 Page 1 EXISTING BUlX POWER SUBSTATIONS IN HASSACllUSETTS 69 kV or Creater Substation Voltage City or Town kV Capacity in MVA Site Acreage No. Substation 2 llawkins Street Boston 115/13.8 150 0.218 3 Atlantic Ave. Boston 115/13.8 250 0.404 4 L Street So. Boston 115/13.8 250 24.189 Medway Ring Hedway 115/13.8 30 15.506 65 Carver Street Boston 115/13.8 150 0.195 71 West Roxbury 115/24 150 9.019 110 Baker Street Walpole 115/13.8 120 13.016 146 Walpole Ring Needham 115/13.8 90 6.093 U 148 Chestnut Street Edgar Ring No. Weymouth 115/13.8 275* 55.872 2 150 Edgar Ring No. Weymouth 115/13.8 140 ea 150

1. ' Woburn 115/13.8 148.333 7.166 211 Hoburn Ring Winchester 4.048 Framingham 230/115 300 43.634 240 1. eland Street 1.916 Sherborn 115/13.8 64 240 1. eland Street ' 44.820 Everett 115/13.8 100 250 Alford Street 3.909 3 Boston 115/18/24 184*

250 Alford Street 115/18 360*

250 Alford Street 345/21.3 633*

250 Alford Street

• Cenerating unit step-up transformers

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t t Company: Boston Edison Company TABLE E-21 Filing Date: April 1, 1980 Hass EFSC (2/76)

Page 2 EXISTING BULK POWER SUBSTATIONS IN HASSACl.USETTS 69 kV or Creater Substation Voltage City or Town kV Capacity in MVA Site Acreage No. Substation Sherborn 115/69/13.8 64 13.120 274 Western Avenue 274 Western Avenue 69/13.8 10 Westera Avenue 115/13.8 20 274 7.290 Waltham Ring Waltham 230/115 300 282 Waltham Ring 115/13.8 160 282 3.627 Newton liighlands 115/13.8 100 292 Eliot Street 5.863 Lexington Ring Lexington 115/13.8 160 320 g

345/115 400 y 320 Lexington Ring Brighton Ring Brighton 115/24/13.8 200 2.7 g 329 115/13.8 100 329 Brighton Ring Sudbury 115/13.8 48 51.730 342 Sudbury Ring Weyland No. Woburn 115/13.8 100 4.900 375 Dragon Court 115/13.8 160 2.250 391 Middlesdx Street Burlington 2A 189 I

So. Boston 115/18 4002 400 New Boston l New Boston 115/22 400*

400 100 0.497 402 Prospect Street Somerville 115/13.8 Haynard 115/13.8 100 1.229 416 Old Hill Road 2.390 Sudbury Acton 0.022 Concord 0.064 Framingham 115/13.8 80 1.298 433 Speen Street 39.297 West Medway Ring West Medway 345/230 800 446 125*

446 West Medway Ring 230/13.8 West Medway Ring 115/13.8 62.5*

446 400 75.513 447 West Walpolt Ring Walpole 345/115

• Cenerating unit step-up transformers

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TABLE E-21 Company: Boston Edison Company .

Mass EFSC (2/76) Filing Date: April 1, 1980 Page 3 EXISTING BULK POWER SUBSTATIONS IN MASSACilUSETTS 69 kV or Greater Substation Voltage No. Substation City or Town kV Capacity in MVA Site Acreage 450 Trapelo Road Waltham 115/13.8 80 2.591 455 Off Worcester Road Framingham 115/13.8 80 1.189 456 country Street Dover 115/13.8 24 20.4 467 Arsenal Street Watertown 115/13.8 250 0.433 470 Wa1 pole Street Canton 115/13.8 80 2.480 478 llolbrook Ring llolbrook 345/115 400 16.507 483 Dewar Street Dorchester 115/13.8 250 4.362 y 488 Willoughby Street Chelsea 115/13.8 24 3.400

,5 492 Scotia Street Boston 115/13.8 250 0.289

• 496 Ilyde Park Avenue Hyde Park 115/13.8 250 0.741 4

650 Pilgrim Station Plymouth 345/4.16 33.3 565.860 650 . Pilgrim Station 345/22.8 700*

509 No. Cambridge Ring Cambridge 345/115 600 8.320 514 Kingston Street Boston 115/13.8 250 1.427 533 Ilartwell Avenue Lexington 115/13.8 250 4.000

• Generating unit step-up transformers

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4 TABLE E-21 Coinpany: Boston Edison Coenpany Mass EFSC (2/76) Filing Date: April 1, 1980 Page 4 EXISTING IRilK POWER SUBdTATIONS IN MASSACl!USETTS 69 kV or Creater Substation Voltage No. Substation City or Town kV Capacity in MVA Site Acreage Notes

1. Acreage also listed under New Boston /L Street Generating Station and under Stations #4 and #400

2. Acreage also listed under Edgar Generating Station ,

g 3. Acreage also listed under Mystic Generating Station Y

y 4. Acreage also listed under Pilgrim Generating Station

• Cenerating unit step-up transforyers

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TABLE E-22 Company: Boston Edison Company Mass EFSC (2/76) Filing Date: April 1,1980 EXDiPT OR APPROVED BulJC POWER SUBSTATIONS IN HASSACHU5trTS 69 kV or Greater Station City or Voltage In-Service No. Substation Town kV Capacity in MVA Site Acreage Date 502 Dean Street I Norfolk 115/13.8 24 4.00 June, 1982 I 2.56 508 Colburn Street Roxbury 115/13.8 250 June, 1983 N/A W. Central St.I Natick 115/13.8 200 2.04 June, 1985 N/A Chathaw Street Boston 115/13.8 250 0.138 June, 1986 H 2 Y N/A Lincoln Street Boston 345/115 400 0.11 June, 1986 E$

Notes

1. Il5kV supply lines will be less than 1.0 mile in length I

2. Type of construction and general need for the facility approved by EFSC in decision 2 DOMSC 58, dated December 21, 1977

l LINCOLN STREET, BOSTON i 345/115 kV Substation (Forecast Page IV-75)

There is no change in the description of this facility since April 1, 1979.

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TABLE E-23 Company: Boston Edison Company Mass EFSC (2/76) Filing Date: April 1, 1980 PROPOSED BU1K POWER SUBSTATIONS IN MASSACIlUSETTS 69 kV or Greater Substation City or Town Voltage kV Capacity in MVA Site Acreage In-Service Date Bingham Road Dedham 115/13.8 250 0.5 1986 Hewton-West 345/113 400 Unknown 1987 Roxbury Area b

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4 BINGHAM ROAD, DEDHAM 115/13.8 kV Substation

[~ (Forecast Page IV-80)

I The in-service date for this project has been changed from 1985 to 1986. The estimated cost of this project will be approximately $5,750,000 in 1986 dollars.

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NELTON-LIST ROIBURY ARIA 345/115 kV SUBSTATION There is no change in the description,of this station since December 31, 1977.

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TABLE E-24 Company: Boston Edison Company .

Mass EFSC (2/76) Filing Date: April 1, 1980 Page 1 ACREEMENTS FOR ELECTRIC SERVICE (Include the followl g types of agreements only:)

PP - Purchase of Electric Power PC - Purchase of Generating Capacity SP - Sale of Electric Power SC - Sale of Generating Capacity LC - Lease of Generating Capacity FPC/DPU Docket or File Effective Terminal; ion Agreement Magnitude of Number Other Parties Date Date Type Pur. or Sales (HW) l-l Rate 69 Hontaup Electric Company 12/09/72 12/09/2000 SC 73.7 Y

H Rate 68 New Bedford Cas & Edison 12/09/72 12/09/2000 SC 73.7 Light Company Rate 77 Boylston Municipal Light 12/01/74 12/31/2000 SC .5 Plant Rate 79 City of Holyoke cas & 12/01/74 12/31/2000 SC 6.0 Electric Dept.

I Rate 81 , City of Westfield Gas & 12/01/74 12/31/2000 SC 1.5 Electric Dept.

Rate 83 Hudson Light & Power Dept. 12/01/74 12/31/2000 SC 2.5 Rate 85 Littleton Light & Water Dept. 12/01/74 12/31/2000 SC 1.0 Rate 87 Marblehead Hunicipal Light 12/01/74 12/31/2000 SC a0 Plant Rate 102 Hiddleborough Hunicipal 2/01/75 12/31/2000 SC .7 Gas & Electric Dept.

Rate 89 North Attleboro flunicipal 12/01/74 12/31/2000 SC 1.0 Electric Light Department

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Mass EFSC (2/76) Filing Date: April 1, 1980 Page 2 ACREEMENTS FOR ELECTRIC SERVICE (Include the followl'gn types of agreements only:)

PP - Purchase of Electric Power PC - Purchase of Cenerating Capacity SP - Sale of Electric Power SC - Sale of Generating Capacity LC - Lease of Generating Capacity FPC/DPU Docket or File Effective Termination Agreement Magnitude of Number Other Parties Date Date Type Pur. or Sales (MW)

Rate 91 Peabody Municipal Light 12/01/74 12/31/2000 SC 1.5 s Plant d

/2 Mate 93 Shrewsbury Municipal 12/01/74 12/31/.2000 SC 2.5 Light Plant Rate 95 Templeton Municipal 12/01/74 12/31/2000 SC .3 Rate 97 Wakefield Municipal Light 12/01/74 12/31/2000 SC 1.0 Department i

Rate 99 West Boylston Municipal 12/01/74 12/31/2000 SC .5 1.ight Dept.

Rate 71 Fitchburg Cas & Electric 12/09/72 9/30/86 SC 40.0 1.ight Co.

Rate 106 Bangor Ilydro Electric Co. 11/01/77 10/31/79 SC 60 Rate 106 Bangor Ilydro Electric Co. 11/01/79 10/31/80 SC 30 Rate 106 Bangor Ilydro Electric Co. 11/01/80 10/31/81 SC 40 Rate 106 Bangor Ilydro Electric Co. 11/01/81 10/31/82 SC 85

TABLE E-24 Company: Boston Edison Comprny ,

Mass EFSC (2/76) -

Filing Date: April 1, 1980 Page 3 ACREEMENTS FOR ELECTRIC SERVICE (Include the following types of agreements only:)

PP - Purchase of Electric Power PC - Purchase of Generating Capacity SP - Sale of Electric Power SC - Sale of Generating Capacity LC - Lease of Generating Capacity FPC/DPU Docket or File Effective Termination Agreement Magnitude of Number Other Parties Date Date Type Pur. or Sales (HQ Rate 106 Bangor Hydro Electric Co. 11/01/82  %/31/84 SC 95 U Rate 107 Cambridge Electric Light Co. 6/14/75 10/31/79 SC 50.24 Y

ER77-83 Reading Municipal Light 11/01/76 12/31/2000 SC 5.0 Dept.

Rate 120 Reading Municipal Light 11/01/80 10/31/81 SC 23.0 Dept.

ER79-27 Reading Hunicgipal Light 11/01/78 10/31/79 SP 51.0 Dept.

ER79-27 Reading Municipal 1.ight 11/01/79 10/31/82 SP 40.0 Dept.

Rate 119 Reading Municipal I.ight 11/01/78 10/31/79 SC 6.0 Dept.

Mate 119 Reading Municipal Light 11/01/80 10/31/81 SC 33.0 Dept.

Rate 119 Reading Municipal Light 11/01/81 10/31/82 SC 10.0 Dept.

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TABLE E-24 Company: Boston Edison Company .

Mass EFSC (2/76) Filing Date: April I, 1980 Page 4 AGREEMENTS FOR EI.ECTRIC SERVICE (Include the follow 1hg types of agreements only:)

PP - Purchase of Electric Power PC - Purchase of Generating Capacity SP - Sale of Electric Power SC - Sale of Generating Capacity LC - lease of Generating Capacity FPC/DPU Docket or File Effective Termination Agreement Magnitude of Number Other Parties Date Date Type Pur. or Sales (HW) pl Rate 1 Canal Electric Company 7/01/68 10/01/2001 PC 143 Y

8' (c) Haine Electric Power Co. 5/24/76 10/31/85 PC 65.0 (c) Haine Electric Power Co. 11/01/85 10/31/86 PC 32.5 (c) Hetropolitan District 1/01/79 1/01/94 PP 1.0 Commission (c) Braintree Electric Light 11/01/78 10/31/79 PC 37.1 Dept.

g (c) Braintree Electric Light 11/01/79 10/31/80 PC 33.6 Dept.

(c) Braintree Electric Light 11/01/80 10/31/81 PC 34.6 Dept.

(c) Filings are made by Seller.

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Filing Date: April 1, 1980 Page 5 AGREEMENTS FOR ELECTRIC SERVICE (Include the following types of agreements only:) .

FP - Purchase of Electric Power PC - Putchase of Generating Capacity SP - Sale of Electric Power SC - Sale of Generating Capacity LC - Lease of Generating Capacity FPC/DPU Docket or File Effective Termination Agreement Magnitude of '

Number Other Parties Date Date Tyr.c Pur. or Sales (NW) g (c) Braintree Electric Light 11/01/81 10/31/82 PC 34.6 M Dept.

& 32.6 (c) Braintree Electric Light 11/01/82 10/31/83 PC Dept.

(c) Braintree Electric Light 11/01/83 10/31/84 PC 17.3 Dept.

(c) Atlantic Celatin 6/06/79 6/06/80 PP (d)

I (c) Filings are made by Seller.

(d) Various amounts in excess of Atlantic Celatin's own load.

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