Riverside Holyoke
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
- 4
- Share of state capacity
- 0.05%
- Rank among hydro plants in Massachusetts
- #11 of 32
- EIA plant code
- 1607
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 8 | Conventional Hydroelectric | 4.0 MW | 4.0 MW | 1931 | Operating |
| 7 | Conventional Hydroelectric | 1.5 MW | 1.5 MW | 2022 | Operating |
| 4 | Conventional Hydroelectric | 0.8 MW | 0.8 MW | 2006 | Operating |
| 5 | Conventional Hydroelectric | 0.6 MW | 0.6 MW | 2006 | 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
| Kearsarge William Way | Solar | 7.0 MW |
| Williams College - Campus CHP | Natural gas | 7.0 MW |
| CED Northampton Solar LLC Hybrid | Solar | 6.6 MW |
| Worcester Landfill | Solar | 6.5 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 6.9 MW solar plant and a 6.9 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