Marmet
Hydro power plant in Kanawha County, West Virginia. 14.4 MW of nameplate capacity across 3 generators, operated by Appalachian Power Co.
Also known as Marmet Power Plant · EIA plant 6561
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 14.4 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- December 1935First generator online
- Operator
- Appalachian Power CoEIA operator ID 733
- Grid
- PJMBalancing authority PJM
- Price nodes
- 3 PJM nodesResource nodes with prices
- Location
- Kanawha County, WV38.2526, −81.5695
- EIA plant ID
- 6561EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Marmet produces
Free · EIA-923Net generation, 2025
67.6 GWh
67,565 MWh, final
Capacity factor, 2025
53.6%
2024: 53.3%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
50.2–78.6
GWh a year. Low 2021, high 2016
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 66,599 | Not reported | 12 of 12 |
| 2001 | 53,742 | Not reported | 12 of 12 |
| 2002 | 60,759 | Not reported | 12 of 12 |
| 2003 | 90,581 | Not reported | 12 of 12 |
| 2004 | 92,500 | Not reported | 12 of 12 |
| 2005 | 78,314 | Not reported | 12 of 12 |
| 2006 | 82,023 | Not reported | 12 of 12 |
| 2007 | 68,094 | Not reported | 12 of 12 |
| 2008 | 66,640 | Not reported | 12 of 12 |
| 2009 | 76,760 | Not reported | 12 of 12 |
| 2010 | 56,492 | 44.8% | 12 of 12 |
| 2011 | 74,056 | 58.7% | 12 of 12 |
| 2012 | 78,972 | 62.4% | 12 of 12 |
| 2013 | 89,520 | 71.0% | 12 of 12 |
| 2014 | 663 | Not reported | 12 of 12 |
| 2015 | 64,988 | 51.5% | 12 of 12 |
| 2016 | 78,551 | 62.1% | 12 of 12 |
| 2017 | 66,241 | 52.5% | 12 of 12 |
| 2018 | 69,938 | 55.4% | 12 of 12 |
| 2019 | 64,997 | 51.5% | 12 of 12 |
| 2020 | 75,407 | 59.6% | 12 of 12 |
| 2021 | 50,153 | 39.8% | 12 of 12 |
| 2022 | 65,891 | 52.2% | 12 of 12 |
| 2023 | 58,651 | 46.5% | 12 of 12 |
| 2024 | 67,422 | 53.3% | 12 of 12 |
| 2025 | 67,565 | 53.6% | 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 · PJMEmissions
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 |
|---|---|---|---|
| 1 | Conventional Hydroelectric | 4.8 | December 1935 |
| 2 | Conventional Hydroelectric | 4.8 | December 1935 |
| 3 | Conventional Hydroelectric | 4.8 | December 1935 |
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 Appalachian Power Co 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 Marmet
More plants operated by Appalachian Power Co
Questions about Marmet
How much power does Marmet produce?
Marmet reported 67,565 MWh (67.6 GWh) of net generation in 2025, a 53.6% capacity factor on 14.4 MW of nameplate capacity.
Where is Marmet?
Marmet is in Kanawha County, West Virginia, at 38.2526, −81.5695. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Marmet?
EIA-860M for August 2026 lists Appalachian Power Co as the operator (EIA operator ID 733). The operator is not always the owner.
When did Marmet start operating?
Its first generator began operating in December 1935, according to EIA-860M.
Does InfraMap have power prices for Marmet?
Yes. InfraMap has PJM day-ahead and real-time prices at 3 price nodes linked to Marmet, 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)
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page