Comerford
Hydro power plant · Grafton County, New Hampshire
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Great River Hydro, LLC
- County
- Grafton County
- Generating units
- 4
- Share of state capacity
- 3.66%
- Rank among hydro plants in New Hampshire
- #2 of 31
- EIA plant code
- 2349
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN2 | Conventional Hydroelectric | 49 MW | 48 MW | 1930 | Operating |
| GEN3 | Conventional Hydroelectric | 49 MW | 48 MW | 1930 | Operating |
| GEN4 | Conventional Hydroelectric | 49 MW | 48 MW | 1930 | Operating |
| GEN1 | Conventional Hydroelectric | 22 MW | 23 MW | 1930 | 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 New Hampshire
| Newington | Other | 414 MW |
| S C Moore | Hydro | 195 MW |
| Granite Reliable Power | Wind | 99 MW |
| Burgess BioPower | Other | 75 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 168 MW solar plant and a 168 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 New Hampshire power plants · What New Hampshire actually generates