Stillwater Hydro Station
Hydro power plant in Penobscot County, Maine. 1.8 MW of nameplate capacity across 4 generators, operated by Brookfield Black Bear Hydro, LLC.
Also known as EIA plant 1478
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1.8 MWNameplate
- Generators
- 4 operatingEIA-860M, August 2026
- Operating since
- January 1913First generator online
- Operator
- Brookfield Black Bear Hydro, LLCEIA operator ID 59178
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- None linkedNo verified ISO node
- Location
- Penobscot County, ME44.9094, −68.6833
- EIA plant ID
- 1478EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Stillwater Hydro Station produces
Free · EIA-923Net generation, 2025
5.91 GWh
5,911 MWh, final
Capacity factor, 2025
37.5%
2024: 44.0%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
5.9–12.1
GWh a year. Low 2025, high 2023
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 9,213 | Not reported | 12 of 12 |
| 2002 | 9,265 | Not reported | 12 of 12 |
| 2003 | 8,913 | Not reported | 12 of 12 |
| 2004 | 11,521 | Not reported | 12 of 12 |
| 2005 | 11,994 | Not reported | 12 of 12 |
| 2006 | 11,725 | Not reported | 12 of 12 |
| 2007 | 12,751 | Not reported | 12 of 12 |
| 2008 | 12,412 | Not reported | 12 of 12 |
| 2009 | 11,083 | Not reported | 12 of 12 |
| 2010 | 12,674 | 80.4% | 12 of 12 |
| 2011 | 12,136 | 77.0% | 12 of 12 |
| 2012 | 13,632 | 86.2% | 12 of 12 |
| 2013 | 10,468 | 66.4% | 12 of 12 |
| 2014 | 10,782 | 68.4% | 12 of 12 |
| 2015 | 11,988 | 76.0% | 12 of 12 |
| 2016 | 10,667 | 67.5% | 12 of 12 |
| 2017 | 8,681 | 55.1% | 12 of 12 |
| 2018 | 8,682 | 55.1% | 12 of 12 |
| 2019 | 10,920 | 69.3% | 12 of 12 |
| 2020 | 7,595 | 48.0% | 12 of 12 |
| 2021 | 7,263 | 46.1% | 12 of 12 |
| 2022 | 9,804 | 62.2% | 12 of 12 |
| 2023 | 12,071 | 76.6% | 12 of 12 |
| 2024 | 6,955 | 44.0% | 12 of 12 |
| 2025 | 5,911 | 37.5% | 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 |
|---|---|---|---|
| SW01 | Conventional Hydroelectric | 0.4 | January 1913 |
| SW02 | Conventional Hydroelectric | 0.4 | January 1913 |
| SW03 | Conventional Hydroelectric | 0.4 | January 1916 |
| SW04 | Conventional Hydroelectric | 0.6 | January 1929 |
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 Black Bear Hydro, LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
300 analyst questions a month, plus MCP
Query Stillwater Hydro Station and 14,224 other projects from Claude or your own tools. Free accounts get 1 question a day.
Power plants near Stillwater Hydro Station
More plants operated by Brookfield Black Bear Hydro, LLC
Questions about Stillwater Hydro Station
How much power does Stillwater Hydro Station produce?
Stillwater Hydro Station reported 5,911 MWh (5.91 GWh) of net generation in 2025, a 37.5% capacity factor on 1.8 MW of nameplate capacity.
Where is Stillwater Hydro Station?
Stillwater Hydro Station is in Penobscot County, Maine, at 44.9094, −68.6833. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Stillwater Hydro Station?
EIA-860M for August 2026 lists Brookfield Black Bear Hydro, LLC as the operator (EIA operator ID 59178). The operator is not always the owner.
When did Stillwater Hydro Station start operating?
Its first generator began operating in January 1913, 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