Deerfield 5
Hydro power plant · Berkshire County, Massachusetts
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Great River Hydro, LLC
- County
- Berkshire County
- Generating units
- 1
- Share of state capacity
- 0.12%
- Rank among hydro plants in Massachusetts
- #7 of 32
- EIA plant code
- 1620
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 18 MW | 14 MW | 1974 | 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
| Berkshire Wind Power Project | Wind | 20 MW |
| NE Renewable Fitchburg, LLC | Other | 18 MW |
| Univ of Massachusetts Medical Center | Natural gas | 18 MW |
| Lawrence Hydroelectric Associates | Hydro | 15 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 18 MW solar plant and a 18 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