Williams Hydro
Hydro power plant in Somerset County, Maine. 13 MW of nameplate capacity across 2 generators, operated by Brookfield White Pine Hydro LLC.
Also known as EIA plant 1510
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 13 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- January 1939First generator online
- Operator
- Brookfield White Pine Hydro LLCEIA operator ID 39006
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 1 ISONE nodeResource nodes with prices
- Location
- Somerset County, ME44.9589, −69.8703
- EIA plant ID
- 1510EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Williams Hydro produces
Free · EIA-923Net generation, 2025
63.5 GWh
63,509 MWh, final
Capacity factor, 2025
55.8%
2024: 70.2%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
61.2–97.2
GWh a year. Low 2021, high 2023
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 78,571 | Not reported | 12 of 12 |
| 2002 | 71,280 | Not reported | 12 of 12 |
| 2003 | 100,667 | Not reported | 12 of 12 |
| 2004 | 89,649 | Not reported | 12 of 12 |
| 2005 | 100,734 | Not reported | 12 of 12 |
| 2006 | 90,792 | Not reported | 12 of 12 |
| 2007 | 86,934 | Not reported | 12 of 12 |
| 2008 | 103,114 | Not reported | 12 of 12 |
| 2009 | 101,771 | Not reported | 12 of 12 |
| 2010 | 96,925 | 85.1% | 12 of 12 |
| 2011 | 104,378 | 91.7% | 12 of 12 |
| 2012 | 97,753 | 85.6% | 12 of 12 |
| 2013 | 90,881 | 79.8% | 12 of 12 |
| 2014 | 94,155 | 82.7% | 12 of 12 |
| 2015 | 94,519 | 83.0% | 12 of 12 |
| 2016 | 83,219 | 72.9% | 12 of 12 |
| 2017 | 92,980 | 81.6% | 12 of 12 |
| 2018 | 82,017 | 72.0% | 12 of 12 |
| 2019 | 64,515 | 56.7% | 12 of 12 |
| 2020 | 78,022 | 68.3% | 12 of 12 |
| 2021 | 61,164 | 53.7% | 12 of 12 |
| 2022 | 66,953 | 58.8% | 12 of 12 |
| 2023 | 97,216 | 85.4% | 12 of 12 |
| 2024 | 80,159 | 70.2% | 12 of 12 |
| 2025 | 63,509 | 55.8% | 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 account · ISONEEmissions
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 |
|---|---|---|---|
| WI1 | Conventional Hydroelectric | 7.0 | January 1939 |
| WI2 | Conventional Hydroelectric | 6.0 | January 1950 |
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 Brookfield White Pine Hydro 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 Williams Hydro
More plants operated by Brookfield White Pine Hydro LLC
Questions about Williams Hydro
How much power does Williams Hydro produce?
Williams Hydro reported 63,509 MWh (63.5 GWh) of net generation in 2025, a 55.8% capacity factor on 13 MW of nameplate capacity.
Where is Williams Hydro?
Williams Hydro is in Somerset County, Maine, at 44.9589, −69.8703. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Williams Hydro?
EIA-860M for August 2026 lists Brookfield White Pine Hydro LLC as the operator (EIA operator ID 39006). The operator is not always the owner.
When did Williams Hydro start operating?
Its first generator began operating in January 1939, according to EIA-860M.
Does InfraMap have power prices for Williams Hydro?
Yes. InfraMap has ISONE day-ahead and real-time prices at 1 price node linked to Williams Hydro, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
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)
- ISONE day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page