135 MW Distillate Oil operating in Norfolk, MA — ISO New England Inc.
135 MW
Nameplate Capacity
3
Generators
units
Petroleum Liquids
Technology
1970
Operating Since
Coordinates
42.1398, -71.4461
County
Norfolk, MA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Constellation Power, Inc | Constellation Power | — |
| Owner(s) | Constellation Power, Inc | Constellation Energy | — |
| Status | Operating | — | — |
Exelon Medway LLC is a 135 MW petroleum liquid-fueled power plant located in Norfolk County, Massachusetts. The plant began operating in 1970 and consists of three generators utilizing petroleum liquid technology. It is owned by Constellation Energy and operated by Constellation Power, Inc. The plant operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region.
In the most recent year of reported data, Exelon Medway LLC generated 1,985 MWh of electricity, resulting in a capacity factor of 0.2%. The plant's relatively low output contributes to its ranking as the second-largest of two petroleum liquid plants in Massachusetts, and 48th out of 60 similar plants nationally.
Generated from EIA, GEM, and public data sources
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
230 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
764 MWh
Latest Month
2.0K MWh
Annual Generation
0.2%
Capacity Factor
No financial data available for this plant.
Point of Interconnection
Nearest Substation
Medway Substation No. 446 · 345 kV
Substation Distance
< 10 km
Operator
Eversource
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
UN.W_MEDWAY13.8WMJ1
Pricing Hub
.H.INTERNAL_HUB
Node Source
EIA-860 direct report
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Last updated 2026-03-25
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