Marmet
Kanawha County, West Virginia · EIA plant ID 6561 · Operator: Appalachian Power Co
Nameplate14MWSummer 14 MW
Generators3in service
Net generation68GWh12 mo to Dec 2025
Capacity factor54%hydro units, summer MW
Heat rate—thermal plants only
First online1935
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 53.7 | 44.5% | — |
| 2002 | 60.8 | 50.3% | — |
| 2003 | 90.6 | 74.9% | — |
| 2004 | 92.5 | 76.3% | — |
| 2005 | 78.3 | 159.6% | — |
| 2006 | 82 | 167.2% | — |
| 2007 | 68.1 | 138.8% | — |
| 2008 | 66.6 | 135.5% | — |
| 2009 | 76.8 | 156.5% | — |
| 2010 | 56.5 | 38.4% | — |
| 2011 | 74.1 | 50.3% | — |
| 2012 | 79 | 53.5% | — |
| 2013 | 89.5 | 60.8% | — |
| 2014 | 0.7 | 0.4% | — |
| 2015 | 65 | 44.2% | — |
| 2016 | 78.6 | 53.2% | — |
| 2017 | 66.2 | 52.5% | — |
| 2018 | 69.9 | 55.4% | — |
| 2019 | 65 | 51.5% | — |
| 2020 | 75.4 | 59.6% | — |
| 2021 | 50.2 | 39.8% | — |
| 2022 | 65.9 | 52.2% | — |
| 2023 | 58.7 | 46.5% | — |
| 2024 | 67.4 | 53.3% | — |
| 2025 | 67.6 | 53.6% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 4.8 | 4.8 | Dec 1935 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 4.8 | 4.8 | Dec 1935 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 4.8 | 4.8 | Dec 1935 | Operating | — | coming soon |
Owner / operator
Operator: Appalachian Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Appalachian Power Co | 100.0% | 14 MW |
Nearby plants
Within 80 km.
| London | 14 MW | 18.5 km |
| Mammoth | — | 23.3 km |
| John E Amos | 2,933 MW | 33 km |
| Glen Ferris Hydro | 6 MW | 33.1 km |
| Hawks Nest Hydro | 102 MW | 36.4 km |
| Winfield | 25 MW | 42.8 km |