Mascoma Hydro
Grafton County, New Hampshire · EIA plant ID 54471 · Operator: Green Mountain Power Corp
Nameplate2MWSummer 2 MW
Generators3in service
Net generation0GWh12 mo to Dec 2025
Capacity factor2%hydro units, summer MW
Heat rate—thermal plants only
First online1988
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 3.2 | 25.3% | — |
| 2002 | 3.5 | 27.8% | — |
| 2003 | 3.8 | 30.3% | — |
| 2004 | 3.7 | 29.1% | — |
| 2005 | 4.4 | 34.7% | — |
| 2006 | 3.9 | 31.0% | — |
| 2007 | 5.3 | 40.1% | — |
| 2008 | 6.7 | 51.1% | — |
| 2009 | 6.2 | 47.0% | — |
| 2010 | 5.4 | 41.2% | — |
| 2011 | 5 | 38.2% | — |
| 2012 | 3.1 | 23.8% | — |
| 2013 | 4.9 | 37.0% | — |
| 2014 | 4 | 30.6% | — |
| 2015 | 3.4 | 25.9% | — |
| 2016 | 2.9 | 22.0% | — |
| 2017 | 1.9 | 14.7% | — |
| 2018 | 1.9 | 14.8% | — |
| 2019 | 3.9 | 29.3% | — |
| 2020 | 1.5 | 11.5% | — |
| 2021 | 0.7 | 5.2% | — |
| 2022 | 1.3 | 9.8% | — |
| 2023 | 3.5 | 26.8% | — |
| 2024 | 1.5 | 11.4% | — |
| 2025 | 0.2 | 1.5% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 0.5 | 0.5 | Dec 1988 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 0.5 | 0.5 | Dec 1988 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 0.5 | 0.5 | Dec 1988 | Operating | — | coming soon |
Owner / operator
Operator: Green Mountain Power Corp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Enel North America, Inc. | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Ottauquechee Hydro | 2 MW | 2.8 km |
| Wilder | 36 MW | 7.6 km |
| Deweys Mill | 3 MW | 8.5 km |
| GMP Solar - Hartford | 5 MW | 8.9 km |
| Dartmouth College Heating Plant | 7 MW | 11.6 km |
| Ascutney | 13 MW | 23.6 km |