Hadley Falls
Hampden County, Massachusetts · EIA plant ID 1605 · Operator: City of Holyoke Gas and Electric Dept.
Nameplate33MWSummer 33 MW
Generators2in service
Net generation137GWh12 mo to Dec 2025
Capacity factor47%hydro units, summer MW
Heat rate—thermal plants only
First online1952
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 | 86.9 | 31.5% | — |
| 2002 | 171.5 | 64.6% | — |
| 2003 | 197.8 | 74.5% | — |
| 2004 | 187.4 | 70.4% | — |
| 2005 | 192.2 | 72.4% | — |
| 2006 | 455.9 | 171.8% | — |
| 2007 | 142.1 | 53.5% | — |
| 2008 | 208.1 | 78.2% | — |
| 2009 | 216.4 | 81.5% | — |
| 2010 | 192.8 | 72.6% | — |
| 2011 | 212.6 | 80.1% | — |
| 2012 | 175.8 | 66.0% | — |
| 2013 | 185.1 | 69.8% | — |
| 2014 | 98.7 | 37.2% | — |
| 2015 | 103.8 | 39.1% | — |
| 2016 | 75.7 | 26.0% | — |
| 2017 | 182 | 62.8% | — |
| 2018 | 178.4 | 61.5% | — |
| 2019 | 105.5 | 36.4% | — |
| 2020 | 94.3 | 32.4% | — |
| 2021 | 209.1 | 72.1% | — |
| 2022 | 164 | 56.6% | — |
| 2023 | 218.2 | 75.3% | — |
| 2024 | 151.1 | 52.0% | — |
| 2025 | 137.3 | 47.4% | — |
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 | 17.6 | 18.1 | Jan 1952 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 15.8 | 15 | Nov 1983 | Operating | — | coming soon |
Owner / operator
Operator: City of Holyoke Gas and Electric Dept.. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of Holyoke Gas and Electric Dept. | 100.0% | 33 MW |
Nearby plants
Within 80 km.
| Boatlock | 3 MW | 0.4 km |
| Cabot Holyoke | 3 MW | 1.4 km |
| Riverside Holyoke | 7 MW | 1.5 km |
| Chemical | 2 MW | 2.3 km |
| Chicopee Solar | 3 MW | 3.4 km |
| Chicopee BESS | — | 4.3 km |