Harriman
Windham County, Vermont · EIA plant ID 3746 · Operator: Great River Hydro, LLC
Nameplate34MWSummer 41 MW
Generators3in service
Net generation98GWh12 mo to Dec 2025
Capacity factor27%hydro units, summer MW
Heat rate—thermal plants only
First online1924
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 | 61 | 21.8% | — |
| 2002 | 108.6 | 30.6% | — |
| 2003 | 121.4 | 34.3% | — |
| 2004 | 96.6 | 27.2% | — |
| 2005 | 120.3 | 34.0% | — |
| 2006 | 121.2 | 34.2% | — |
| 2007 | 19.3 | 5.4% | — |
| 2008 | 128.8 | 35.7% | — |
| 2009 | 117 | 32.5% | — |
| 2010 | 101.9 | 28.3% | — |
| 2011 | 137.2 | 38.1% | — |
| 2012 | 75.4 | 20.9% | — |
| 2013 | 97.9 | 27.2% | — |
| 2014 | 99.4 | 27.6% | — |
| 2015 | 64.7 | 18.1% | — |
| 2016 | 65.2 | 18.2% | — |
| 2017 | 110.9 | 31.0% | — |
| 2018 | 128.8 | 36.0% | — |
| 2019 | 103.7 | 29.0% | — |
| 2020 | 88.9 | 24.8% | — |
| 2021 | 111.8 | 31.3% | — |
| 2022 | 80.6 | 22.6% | — |
| 2023 | 125.9 | 35.2% | — |
| 2024 | 91.5 | 25.5% | — |
| 2025 | 98.2 | 27.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | HY | 11.2 | 13.6 | May 1924 | Operating | — | coming soon |
| GEN2 | Conventional Hydroelectric | HY | 11.2 | 13.6 | Jun 1924 | Operating | — | coming soon |
| GEN3 | Conventional Hydroelectric | HY | 11.2 | 13.6 | Nov 1924 | Operating | — | coming soon |
Owner / operator
Operator: Great River Hydro, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Great River Hydro, LLC | 100.0% | 34 MW |
Nearby plants
Within 80 km.
| Sherman | 7 MW | 7.2 km |
| Searsburg Wind Turbine | 6 MW | 8.6 km |
| Searsburg | 4 MW | 8.7 km |
| Deerfield Wind LLC | 30 MW | 11.3 km |
| New England Wind LLC | 29 MW | 11.4 km |
| Deerfield 5 | 18 MW | 11.9 km |