Marshfield 6
Hydro power plant · Washington County, Vermont
Nameplate capacity
5.0 MW
Rank in Vermont
#40
of 117 plants
In service since
1927
January 1927
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Green Mountain Power Corp
- County
- Washington County
- Generating units
- 1
- Share of state capacity
- 0.56%
- Rank among hydro plants in Vermont
- #16 of 45
- EIA plant code
- 3739
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 5.0 MW | 5.0 MW | 1927 | 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 Vermont
| GMP Solar - Williamstown | Solar | 5.0 MW |
| Georgia Ballard BESS | Battery storage | 5.0 MW |
| South Street - Middlebury | Solar | 5.0 MW |
| Springfield BESS | Battery storage | 5.0 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 5.0 MW solar plant and a 5.0 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 Vermont power plants · What Vermont actually generates