Cabot
Franklin County, Massachusetts · EIA plant ID 1629 · Operator: FirstLight Power Resources, Inc. - MA
Nameplate62MWSummer 62 MW
Generators6in service
Net generation239GWh12 mo to Dec 2025
Capacity factor44%hydro units, summer MW
Heat rate—thermal plants only
First online1915
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 | 138.3 | 32.6% | — |
| 2002 | 229.3 | 51.1% | — |
| 2003 | 268.4 | 52.1% | — |
| 2004 | 283.6 | 52.3% | — |
| 2005 | 321.1 | 59.3% | — |
| 2006 | 392.4 | 72.5% | — |
| 2007 | 297.9 | 55.0% | — |
| 2008 | 381.9 | 70.3% | — |
| 2009 | 373.2 | 68.9% | — |
| 2010 | 321.1 | 59.3% | — |
| 2011 | 351.4 | 64.9% | — |
| 2012 | 295.8 | 54.5% | — |
| 2013 | 339.2 | 62.7% | — |
| 2014 | 330.6 | 61.1% | — |
| 2015 | 280 | 51.7% | — |
| 2016 | 246 | 45.3% | — |
| 2017 | 326 | 60.2% | — |
| 2018 | 332.8 | 61.5% | — |
| 2019 | 300.5 | 55.5% | — |
| 2020 | 275.9 | 50.8% | — |
| 2021 | 328.6 | 60.7% | — |
| 2022 | 282.4 | 52.2% | — |
| 2023 | 394.4 | 72.9% | — |
| 2024 | 304.2 | 56.0% | — |
| 2025 | 239.5 | 44.2% | — |
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 | 10.3 | 10.3 | Jan 1915 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 10.3 | 10.3 | Jan 1915 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 10.3 | 10.3 | Jan 1916 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 10.3 | 10.3 | Jan 1916 | Operating | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 10.3 | 10.3 | Jan 1917 | Operating | — | coming soon |
| 6 | Conventional Hydroelectric | HY | 10.3 | 10.3 | Jan 1917 | Operating | — | coming soon |
Owner / operator
Operator: FirstLight Power Resources, Inc. - MA. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| FirstLight Power Resources, Inc. - MA | 100.0% | 62 MW |
Nearby plants
Within 80 km.
| Kearsarge Montague | 4 MW | 1.3 km |
| Kearsarge Montague BD(CSG) | 4 MW | 1.8 km |
| Turners Falls | 6 MW | 2.7 km |
| Axio Green LLC | 2 MW | 2.8 km |
| Deerfield CSG Solar | 5 MW | 2.9 km |
| Greenfield Solar PV | 2 MW | 5.8 km |