Millennium Power
Natural gas power plant · Worcester County, Massachusetts
Details
- Primary fuel
- Natural gas
- Technology
- Natural Gas Fired Combined Cycle
- Operator
- Millennium Power Company, LLC
- County
- Worcester County
- Generating units
- 2
- Share of state capacity
- 3.05%
- Rank among natural gas plants in Massachusetts
- #5 of 40
- EIA plant code
- 55079
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| CT01 | Natural Gas Fired Combined Cycle | 295 MW | 222 MW | 2001 | Operating |
| ST01 | Natural Gas Fired Combined Cycle | 132 MW | 108 MW | 2001 | 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
| ANP Blackstone Energy Project | Natural gas | 578 MW |
| Stony Brook | Other | 542 MW |
| Bellingham Cogeneration Facility | Natural gas | 386 MW |
| Berkshire Power | Natural gas | 289 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 428 MW solar plant and a 428 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