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541.5 MW Petroleum Liquids (535 MW) + Solar Photovoltaic (7 MW) operating in Hampden, MA — ISO New England Inc.
541.5 MW
Nameplate Capacity
10
Generators
units
Hybrid (2)
Technology
Petroleum Liquids + Solar Photovoltaic
1981
Operating Since
Coordinates
42.1978, -72.5106
County
Hampden, MA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Massachusetts Mun Wholes Electric Co | Massachusetts Municipal Wholesale Electric Company | — |
| Owner(s) | Green Mountain Power Corp, Massachusetts Mun Wholes Electric Co, The Town of Lyndon Electric Department | small shareholder(s) | — |
| Status | Operating | operating | — |
The Stony Brook Power Plant is a petroleum-fired power station located in Ludlow, MA on a 350-acre site.
Read more on WikipediaThe Stony Brook power plant, located in Hampden County, Massachusetts, is a hybrid facility with a total capacity of 541.5 MW. The plant's primary fuel is Distillate Fuel Oil (DFO), but it also incorporates solar photovoltaic technology. Stony Brook consists of 10 generators and began operating in 1981. The plant is owned by small shareholder(s) and operated by Massachusetts Municipal Wholesale Electric Company.
Stony Brook operates within the ISO New England Inc. balancing authority and the NPCC NERC region. The plant's latest annual generation was 103,956 MWh, resulting in a capacity factor of 2.2%. The solar component utilizes a fixed tilt tracking system. Financial data is available for the plant from LBNL Solar. Stony Brook is ranked as 1 of 2 similar plants in Massachusetts and 20 of 60 nationally.
Generated from EIA, GEM, and public data sources
ISO/RTO
ISO-NE
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
ISO New England Inc. (ISNE)
Grid Voltage
345.0 kV
Regulatory Status
RE — Regulated
Entity Type
Political Subdivision
Sector
Electric Utility
2.6K MWh
Latest Month
104.0K MWh
Annual Generation
2.2%
Capacity Factor
CO₂ Intensity
1640 lb/MWh
Low-utilization plant — per-MWh rate is dominated by startup/standby emissions; not directly comparable to baseload averages.
NOx
6 lb/MWh
SO₂
0.000 lb/MWh
CH₄
0.058 lb/MWh
N₂O
0.011 lb/MWh
Capacity Factor
0.5%
Annual Net Gen
22 GWh
CO₂eq
1645 lb/MWh
Subregion
NPCC New England
Data from 2019–2023
$30.3/MWh
Energy Value
$3.6/MWh
Capacity Value
Point of Interconnection
Nearest Substation
Stony Brook Substation · 115 kV
Substation Distance
< 10 km
Operator
Massachusetts Municipal Wholesale Electric Company
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
UN.STONTBRK13.2ST2A
Pricing Hub
.H.INTERNAL_HUB
Location Type
NETWORK NODE
Node Source
EIA-860 direct report
Last updated 2026-03-26
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