The MMWEC power supply includes MMWEC-owned capacity in five major New England power plants:

The MMWEC-owned capacity and energy from these plants is resold at MMWEC’s cost to 28 Massachusetts municipal utilities, the Pascoag (Rhode Island) Utility District and six utilities in Vermont. MMWEC also purchases power in bulk through bilateral contracts with power suppliers and resells the power at cost to participating utilities.

The Stony Brook power plant is unique among the units in MMWEC’s power supply, because it is the first power plant in New England built by and for consumer-owned utilities. The Stony Brook plant consists of a 350-megawatt Intermediate Unit and a 170-megawatt Peaking Unit. Both units are operated by MMWEC. While these units share many common facilities, including the same building, they were developed as separate units in the MMWEC power supply. The Stony Brook units are located on MMWEC’s 400-acre Stony Brook Energy Center site, which also is home to MMWEC’s corporate headquarters and is located in Ludlow, Massachusetts.

Stony Brook Intermediate Unit
The Stony Brook Intermediate Unit is a 350-megawatt, combined-cycle power plant that entered commercial operation in 1981. MMWEC owns 90.75% of the unit, or about 318 megawatts of generating capacity. The balance of the unit it owned by Green Mountain Power Corporation (8.8%) and the Village of Lyndonville, VT (0.44%).

The unit’s three gas turbines generate electricity using either No. 2 oil or natural gas, with additional electricity produced using a single steam turbine in the combined-cycle process. MMWEC completed construction of a new natural gas pipeline to serve the Intermediate Unit in September 2002.

MMWEC’s Stony Brook Intermediate Unit Project Participants include 24 Massachusetts municipal utilities based in the communities of Ashburnham, Boylston, Danvers, Georgetown, Groton, Hingham, Holden, Hull, Ipswich, Littleton, Mansfield, Marblehead, Middleborough, Middleton, North Attleborough, Paxton, Peabody, Reading, Shrewsbury, Sterling, Templeton, Wakefield, West Boylston and Westfield. Other Intermediate Unit Project Participants include Green Mountain Power Corp. and five consumer-owned utilities based in the Vermont towns of Stowe, Ludlow, Hardwick, Morrisville and Swanton.

Quick Facts - Stony Brook Intermediate Unit
Location	Ludlow, Massachusetts
On-Line Date	1981
Fuel	No. 2 oil/natural gas
Principal Owner/Operator	MMWEC
Total Capacity	350 megawatts
MMWEC Ownership	318 megawatts

Stony Brook Peaking Unit
The Stony Brook Peaking Unit is a 170-megawatt peaking plant that entered commercial operation in 1982. MMWEC is the sole owner and operator of the Peaking Unit. The unit’s two gas turbines generate electricity using No. 2 fuel oil.

MMWEC’s Stony Brook Peaking Unit Project Participants include 22 Massachusetts municipal utilities based in the communities of Ashburnham, Boylston, Danvers, Georgetown, Groton, Hingham, Holden, Holyoke, Hull, Littleton, Mansfield, Marblehead, Middleborough, Middleton, North Attleborough, Paxton, Reading, Sterling, Templeton, Wakefield, West Boylston and Westfield.

Quick Facts - Stony Brook Peaking Unit
Location	Ludlow, Massachusetts
On-Line Date	1982
Fuel	No. 2 oil
Principal Owner/Operator	MMWEC
Total Capacity	170 megawatts
MMWEC Ownership	170 megawatts

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