Exelon Medway LLC
Exelon Medway LLC is a 135 MW oil-fired power plant in Norfolk County, Massachusetts, operated by Constellation Power, Inc. EIA-860M lists 3 generating units here, inside ISO New England. Its units entered service between 1970 and 1971.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 135 MW
- 122.9 MW net summer
- Generating units
- 3
- In service
- 1970–1971
- EIA plant ID
- 1592
Where it is
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- County
- Norfolk County, Massachusetts
- Coordinates
- 42.14, -71.4464
- Balancing authority
- ISNE
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Constellation Power, Inc
- Primary energy source
- Petroleum
- Technologies
- Petroleum Liquids
- Status
- Operating
Exelon Medway LLC: FAQ
- Where is Exelon Medway LLC?
- In Norfolk County, Massachusetts (MA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Exelon Medway LLC?
- 135 MW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.
- Who owns Exelon Medway LLC?
- EIA-860M names Constellation Power, Inc as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is Exelon Medway LLC still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.