Boatlock
Hydro power plant · Hampden County, Massachusetts
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- City of Holyoke Gas and Electric Dept.
- County
- Hampden County
- Generating units
- 3
- Share of state capacity
- 0.02%
- Rank among hydro plants in Massachusetts
- #22 of 32
- EIA plant code
- 1603
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 2 | Conventional Hydroelectric | 1.2 MW | 1.5 MW | 2024 | Operating |
| 3 | Conventional Hydroelectric | 1.2 MW | 1.2 MW | 2024 | Operating |
| 1 | Conventional Hydroelectric | 0.7 MW | 0.7 MW | 2021 | 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
| Putts Bridge | Hydro | 3.2 MW |
| 580 River Solar | Solar | 3.1 MW |
| DG Dighton LLC CSG | Solar | 3.1 MW |
| 196 Tremont St(CSG) | Battery storage | 3.0 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 3.1 MW solar plant and a 3.1 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