Orono B
Hydro power plant in Penobscot County, Maine. 3.9 MW of nameplate capacity across 3 generators, operated by Brookfield Black Bear Hydro, LLC.
Also known as EIA plant 59438
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 3.9 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- November 2013First generator online
- Operator
- Brookfield Black Bear Hydro, LLCEIA operator ID 59178
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 1 ISONE nodeResource nodes with prices
- Location
- Penobscot County, ME44.8844, −68.6639
- EIA plant ID
- 59438EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Orono B produces
Free · EIA-923Net generation, 2025
17.2 GWh
17,242 MWh, final
Capacity factor, 2025
50.5%
2024: 62.1%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
15.8–29.3
GWh a year. Low 2021, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | 26,772 | 78.4% | 12 of 12 |
| 2015 | 29,264 | 85.7% | 12 of 12 |
| 2016 | 26,544 | 77.5% | 12 of 12 |
| 2017 | 26,108 | 76.4% | 12 of 12 |
| 2018 | 23,933 | 70.1% | 12 of 12 |
| 2019 | 24,097 | 70.5% | 12 of 12 |
| 2020 | 18,424 | 53.8% | 12 of 12 |
| 2021 | 15,807 | 46.3% | 12 of 12 |
| 2022 | 26,041 | 76.2% | 12 of 12 |
| 2023 | 25,508 | 74.7% | 12 of 12 |
| 2024 | 21,267 | 62.1% | 12 of 12 |
| 2025 | 17,242 | 50.5% | 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 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 |
|---|---|---|---|
| ORB-1 | Conventional Hydroelectric | 1.3 | November 2013 |
| ORB-2 | Conventional Hydroelectric | 1.3 | November 2013 |
| ORB-3 | Conventional Hydroelectric | 1.3 | November 2013 |
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.
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Power plants near Orono B
More plants operated by Brookfield Black Bear Hydro, LLC
Questions about Orono B
How much power does Orono B produce?
Orono B reported 17,242 MWh (17.2 GWh) of net generation in 2025, a 50.5% capacity factor on 3.9 MW of nameplate capacity.
Where is Orono B?
Orono B is in Penobscot County, Maine, at 44.8844, −68.6639. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Orono B?
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 Orono B start operating?
Its first generator began operating in November 2013, according to EIA-860M.
Does InfraMap have power prices for Orono B?
Yes. InfraMap has ISONE day-ahead and real-time prices at 1 price node linked to Orono B, 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