Salem Harbor Power Development LP
Natural gas power plant · Essex County, Massachusetts
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Salem Harbor Power Development LP
- County
- Essex County
- Generating units
- 4
- Share of state capacity
- 5.69%
- Rank among natural gas plants in Massachusetts
- #2 of 40
- EIA plant code
- 60903
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 3 | Natural Gas Fired Combined Cycle | 241 MW | — | 2018 | Operating |
| 4 | Natural Gas Fired Combined Cycle | 241 MW | — | 2018 | Operating |
| 1 | Natural Gas Fired Combined Cycle | 158 MW | 338 MW | 2018 | Operating |
| 2 | Natural Gas Fired Combined Cycle | 158 MW | 337 MW | 2018 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Massachusetts
| Fore River Generating Station | Natural gas | 872 MW |
| Vineyard Wind 1 | Wind | 800 MW |
| Bear Swamp | Hydro | 666 MW |
| ANP Bellingham Energy Project | Natural gas | 578 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 798 MW solar plant and a 798 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Massachusetts power plants · What Massachusetts actually generates