Boott Hydropower
Middlesex County, Massachusetts · EIA plant ID 10556 · Operator: Boott Hydro, LLC - Hybrid
Nameplate23MWSummer 22 MW
Generators3in service
Net generation61GWh12 mo to Dec 2025
Capacity factor32%hydro units, summer MW
Heat rate—thermal plants only
First online1985
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 | 72.5 | 38.0% | — |
| 2002 | 81.7 | 42.8% | — |
| 2003 | 111.9 | 58.7% | — |
| 2004 | 85.9 | 44.9% | — |
| 2005 | 89.8 | 47.1% | — |
| 2006 | 79.5 | 41.7% | — |
| 2007 | 77.5 | 40.8% | — |
| 2008 | 86.4 | 45.3% | — |
| 2009 | 76.8 | 40.4% | — |
| 2010 | 77.6 | 40.8% | — |
| 2011 | 103.6 | 54.5% | — |
| 2012 | 96.3 | 50.5% | — |
| 2013 | 104.6 | 55.0% | — |
| 2014 | 85.9 | 45.2% | — |
| 2015 | 68.4 | 36.0% | — |
| 2016 | 63.1 | 33.1% | — |
| 2017 | 83.1 | 43.7% | — |
| 2018 | 95 | 50.0% | — |
| 2019 | 87.6 | 46.1% | — |
| 2020 | 66.8 | 35.0% | — |
| 2021 | 75.9 | 39.9% | — |
| 2022 | 55.7 | 29.3% | — |
| 2023 | 0 | 0.0% | — |
| 2024 | 27.5 | 14.4% | — |
| 2025 | 60.8 | 32.0% | — |
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 | 7.5 | 7.1 | Oct 1985 | Operating | — | coming soon |
| GEN2 | Conventional Hydroelectric | HY | 7.5 | 7.1 | Oct 1985 | Operating | — | coming soon |
| GEN3 | Conventional Hydroelectric | HY | 7.9 | 7.5 | Oct 1985 | Operating | — | coming soon |
Owner / operator
Operator: Boott Hydro, LLC - Hybrid . Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Boott Hydro, LLC - Hybrid | 100.0% | 23 MW |
Nearby plants
Within 80 km.
| Tanner Street Generation | retired | 2.4 km |
| Lowell Solar Landfill | 1 MW | 6.5 km |
| BWC Stony Brook, LLC Hybrid | 2 MW | 6.8 km |
| Westford Solar Park | 4 MW | 8.1 km |
| Shaffer | 5 MW | 8.8 km |
| Iron Horse Solar 4, LLC | 5 MW | 9.5 km |