Ellsworth Hydro Station
Hancock County, Maine · EIA plant ID 1469 · Operator: Brookfield Black Bear Hydro, LLC
Nameplate9MWSummer 9 MW
Generators4in service
Net generation18GWh12 mo to Dec 2025
Capacity factor22%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 | 13.4 | 18.0% | — |
| 2002 | 35.6 | 43.7% | — |
| 2003 | 35.5 | 43.6% | — |
| 2004 | 22.3 | 27.2% | — |
| 2005 | 41 | 50.3% | — |
| 2006 | 29.9 | 36.8% | — |
| 2007 | 28.1 | 34.5% | — |
| 2008 | 43.4 | 53.1% | — |
| 2009 | 36.7 | 45.0% | — |
| 2010 | 30.4 | 37.3% | — |
| 2011 | 31.5 | 38.6% | — |
| 2012 | 29.6 | 36.3% | — |
| 2013 | 29.7 | 36.5% | — |
| 2014 | 35.7 | 43.8% | — |
| 2015 | 26.6 | 32.6% | — |
| 2016 | 23.1 | 28.2% | — |
| 2017 | 22.3 | 27.4% | — |
| 2018 | 25.9 | 31.8% | — |
| 2019 | 37 | 45.4% | — |
| 2020 | 21.9 | 26.9% | — |
| 2021 | 26.3 | 32.3% | — |
| 2022 | 28.3 | 34.8% | — |
| 2023 | 35 | 43.0% | — |
| 2024 | 21.9 | 26.8% | — |
| 2025 | 18.3 | 22.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| EL01 | Conventional Hydroelectric | HY | 2.5 | 2.6 | Jul 1924 | Operating | — | coming soon |
| EL02 | Conventional Hydroelectric | HY | 2 | 2.1 | Jul 1938 | Operating | — | coming soon |
| EL03 | Conventional Hydroelectric | HY | 2 | 2.1 | Jul 1938 | Operating | — | coming soon |
| EL04 | Conventional Hydroelectric | HY | 2.4 | 2.5 | Jul 1924 | Operating | — | coming soon |
Owner / operator
Operator: Brookfield Black Bear Hydro, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Brookfield Black Bear Hydro, LLC | 100.0% | 9 MW |
Nearby plants
Within 80 km.
| BD Solar Ellsworth LLC | 7 MW | 4.2 km |
| Mariaville Road Elsworth Solar, LLC | 2 MW | 4.7 km |
| BD Solar Hancock LLC | 7 MW | 6.1 km |
| REDP - Trenton | 5 MW | 8.3 km |
| BRNG Nicolin (CSG) | 3 MW | 10.5 km |
| Hogs Bay | — | 18.6 km |