Deerfield 5
Berkshire County, Massachusetts · EIA plant ID 1620 · Operator: Great River Hydro, LLC
Nameplate18MWSummer 14 MW
Generators1in service
Net generation44GWh12 mo to Dec 2025
Capacity factor36%hydro units, summer MW
Heat rate—thermal plants only
First online1974
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 | 39.2 | 26.9% | — |
| 2002 | 53.5 | 43.6% | — |
| 2003 | 60.5 | 49.4% | — |
| 2004 | 56.3 | 45.8% | — |
| 2005 | 43.3 | 35.3% | — |
| 2006 | 63 | 51.4% | — |
| 2007 | 8.2 | 6.7% | — |
| 2008 | 65.6 | 53.8% | — |
| 2009 | 67.8 | 55.7% | — |
| 2010 | 55.2 | 45.3% | — |
| 2011 | 65 | 53.3% | — |
| 2012 | 40.3 | 33.0% | — |
| 2013 | 53.3 | 43.8% | — |
| 2014 | 53.1 | 43.6% | — |
| 2015 | 40.3 | 33.1% | — |
| 2016 | 37.5 | 30.7% | — |
| 2017 | 61 | 50.1% | — |
| 2018 | 63.6 | 52.2% | — |
| 2019 | 52.2 | 42.8% | — |
| 2020 | 48.5 | 39.7% | — |
| 2021 | 62.7 | 51.5% | — |
| 2022 | 43.5 | 35.7% | — |
| 2023 | 63.1 | 51.8% | — |
| 2024 | 42.1 | 34.5% | — |
| 2025 | 44.4 | 36.5% | — |
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 | 17.5 | 13.9 | Oct 1974 | 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% | 18 MW |
Nearby plants
Within 80 km.
| Bear Swamp | 666 MW | 0.9 km |
| Fife Brook | 11 MW | 1.9 km |
| Sherman | 7 MW | 4.8 km |
| New England Wind LLC | 29 MW | 7 km |
| Charlemont A | 5 MW | 7.4 km |
| Fairhaven E | 2 MW | 7.4 km |