Passadumkeag Windpark LLC
Wind power plant in Penobscot County, Maine. 42.9 MW of nameplate capacity across 1 generator, operated by Southern Power Co.
Also known as Passadumkeag · EIA plant 59222
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 42.9 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- July 2016First generator online
- Operator
- Southern Power CoEIA operator ID 17650
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 1 ISONE nodeResource nodes with prices
- Location
- Penobscot County, ME45.0700, −68.2100
- EIA plant ID
- 59222EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Passadumkeag Windpark produces
Free · EIA-923Net generation, 2025
141 GWh
140,618 MWh, final
Capacity factor, 2025
37.4%
2024: 33.9%
January to July 2026
77.3 GWh
Provisional
Range, 2017 to 2025
127.8–148.8
GWh a year. Low 2024, high 2018
| 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 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | 63,856 | Not reported | 6 of 12 |
| 2017 | 137,270 | 39.3% | 12 of 12 |
| 2018 | 148,751 | 42.6% | 12 of 12 |
| 2019 | 144,070 | Not reported | 12 of 12 |
| 2020 | 143,332 | 38.0% | 12 of 12 |
| 2021 | 137,148 | 36.5% | 12 of 12 |
| 2022 | 145,241 | 38.6% | 12 of 12 |
| 2023 | 129,942 | 34.6% | 12 of 12 |
| 2024 | 127,803 | 33.9% | 12 of 12 |
| 2025 | 140,618 | 37.4% | 12 of 12 |
| 2026 (provisional, partial year) | 77,338 | 35.4% | 7 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 |
|---|---|---|---|
| Q357 | Onshore Wind Turbine | 42.9 | July 2016 |
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 Southern Power Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Power plants near Passadumkeag Windpark
More plants operated by Southern Power Co
Questions about Passadumkeag Windpark
How much power does Passadumkeag Windpark LLC produce?
Passadumkeag Windpark LLC reported 140,618 MWh (141 GWh) of net generation in 2025, a 37.4% capacity factor on 42.9 MW of nameplate capacity. From January to July 2026 it reported 77.3 GWh, which is provisional.
Where is Passadumkeag Windpark LLC?
Passadumkeag Windpark LLC is in Penobscot County, Maine, at 45.0700, −68.2100. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Passadumkeag Windpark LLC?
EIA-860M for August 2026 lists Southern Power Co as the operator (EIA operator ID 17650). The operator is not always the owner.
When did Passadumkeag Windpark LLC start operating?
Its first generator began operating in July 2016, according to EIA-860M.
Does InfraMap have power prices for Passadumkeag Windpark LLC?
Yes. InfraMap has ISONE day-ahead and real-time prices at 1 price node linked to Passadumkeag Windpark LLC, 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
- Project names from the USGS U.S. Wind Turbine Database
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page