S D Warren Westbrook
Hydro power plant in Cumberland County, Maine. 7.2 MW of nameplate capacity across 14 generators, operated by Relevate Power Management LLC.
Also known as S.D. Warren Westbrook · SD Warren Westbrook · EIA plant 50447
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 7.2 MWNameplate
- Generators
- 14 operatingEIA-860M, August 2026
- Operating since
- January 1903First generator online
- Operator
- Relevate Power Management LLCEIA operator ID 66098
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- None linkedNo verified ISO node
- Location
- Cumberland County, ME43.6849, −70.3531
- EIA plant ID
- 50447EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power S D Warren Westbrook produces
Free · EIA-923Net generation, 2025
15.0 GWh
14,985 MWh, final
Capacity factor, 2025
2.5%
2024: Not reported
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
15.0–145.2
GWh a year. Low 2025, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 383,362 | Not reported | 12 of 12 |
| 2001 | 414,288 | Not reported | 12 of 12 |
| 2002 | 345,874 | Not reported | 12 of 12 |
| 2003 | 405,698 | Not reported | 12 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | 421,998 | Not reported | 12 of 12 |
| 2006 | 414,417 | Not reported | 12 of 12 |
| 2007 | 430,174 | Not reported | 12 of 12 |
| 2008 | 349,084 | Not reported | 12 of 12 |
| 2009 | 172,782 | Not reported | 12 of 12 |
| 2010 | 175,762 | 28.3% | 12 of 12 |
| 2011 | 148,888 | 24.0% | 12 of 12 |
| 2012 | 141,942 | 22.8% | 12 of 12 |
| 2013 | 221,747 | 35.7% | 12 of 12 |
| 2014 | 172,841 | 30.4% | 11 of 12 |
| 2015 | 145,180 | 23.4% | 12 of 12 |
| 2016 | 106,259 | 17.1% | 12 of 12 |
| 2017 | 114,749 | 18.5% | 12 of 12 |
| 2018 | 116,565 | 18.8% | 12 of 12 |
| 2019 | 110,947 | Not reported | 12 of 12 |
| 2020 | 94,699 | 15.5% | 12 of 12 |
| 2021 | 20,198 | 3.3% | 12 of 12 |
| 2022 | 15,759 | 2.6% | 12 of 12 |
| 2023 | 32,731 | 5.4% | 12 of 12 |
| 2024 | Not reported | Not reported | 0 of 12 |
| 2025 | 14,985 | 2.5% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 0.6 | January 1903 |
| GEN2 | Conventional Hydroelectric | 0.6 | January 1903 |
| GEN3 | Conventional Hydroelectric | 0.6 | January 1903 |
| GEN4 | Conventional Hydroelectric | 0.8 | January 1913 |
| GEN5 | Conventional Hydroelectric | 0.8 | January 1913 |
| GEN6 | Conventional Hydroelectric | 0.8 | January 1913 |
| GEN7 | Conventional Hydroelectric | 0.6 | January 1940 |
| GN11 | Conventional Hydroelectric | 0.6 | January 1940 |
| GN12 | Conventional Hydroelectric | 0.2 | January 1940 |
| GN13 | Conventional Hydroelectric | 0.2 | January 1940 |
| GN14 | Conventional Hydroelectric | 0.2 | January 1940 |
| GN15 | Conventional Hydroelectric | 0.2 | January 1940 |
| GN16 | Conventional Hydroelectric | 0.5 | January 1940 |
| GN17 | Conventional Hydroelectric | 0.5 | January 1940 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Relevate Power Management LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near S D Warren Westbrook
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Questions about S D Warren Westbrook
How much power does S D Warren Westbrook produce?
S D Warren Westbrook reported 14,985 MWh (15.0 GWh) of net generation in 2025, a 2.5% capacity factor on 7.2 MW of nameplate capacity.
Where is S D Warren Westbrook?
S D Warren Westbrook is in Cumberland County, Maine, at 43.6849, −70.3532. It is in the ISO New England Inc. balancing area (ISNE).
Who operates S D Warren Westbrook?
EIA-860M for August 2026 lists Relevate Power Management LLC as the operator (EIA operator ID 66098). The operator is not always the owner.
When did S D Warren Westbrook start operating?
Its first generator began operating in January 1903, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page