Marsh Run Generation Facility
Fauquier County, Virginia · EIA plant ID 7836 · Operator: Old Dominion Electric Coop
Nameplate597MWSummer 484 MW
Generators3in service
Net generation687GWh12 mo to Dec 2025
Capacity factor16%gas/coal/oil units, summer MW
Heat rate11,308Btu/kWhfossil units, electric fuel, HHV
First online2004Runs as peaking
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2004 | 13.7 | 1.0% | 10,725 |
| 2005 | 239.3 | 5.8% | 10,836 |
| 2006 | 221.6 | 5.4% | 11,051 |
| 2007 | 270.6 | 6.6% | 11,190 |
| 2008 | 140.6 | 3.4% | 11,903 |
| 2009 | 92.8 | 2.2% | 12,009 |
| 2010 | 612.4 | 14.5% | 10,745 |
| 2011 | 146.8 | 3.5% | 10,836 |
| 2012 | 115.4 | 2.7% | 10,872 |
| 2013 | 214.3 | 5.1% | 10,574 |
| 2014 | 389.4 | 9.2% | 10,757 |
| 2015 | 681.3 | 16.2% | 10,763 |
| 2016 | 547.2 | 12.9% | 10,862 |
| 2017 | 464.7 | 11.0% | 10,874 |
| 2018 | 564.1 | 13.4% | 10,855 |
| 2019 | 708.3 | 16.8% | 10,775 |
| 2020 | 574 | 13.6% | 10,869 |
| 2021 | 672.6 | 16.0% | 10,786 |
| 2022 | 333.8 | 7.9% | 11,688 |
| 2023 | 215.4 | 5.1% | 12,177 |
| 2024 | 390.8 | 9.2% | 11,306 |
| 2025 | 687.4 | 16.2% | 11,308 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo544,147 MMBtu
Last month with liquid burnDec 2025
Switch while operatingYes
Net summer MW on gas484
Net summer MW on oil484
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)
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 | Natural Gas Fired Combustion Turbine | GT | 198.9 | 161.8 | Sep 2004 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 198.9 | 160.5 | Sep 2004 | Operating | — | coming soon |
| 3 | Natural Gas Fired Combustion Turbine | GT | 198.9 | 161.7 | Sep 2004 | Operating | — | coming soon |
Owner / operator
Operator: Old Dominion Electric Coop. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Old Dominion Electric Coop | 100.0% | 597 MW |
Nearby plants
Within 80 km.
| Remington | 706 MW | 1.8 km |
| Remington Solar Facility | 20 MW | 2.3 km |
| Bealeton Solar | — | 3.2 km |
| Greenwood Solar I | — | 16.6 km |
| Energix Nokesville, LLC | 20 MW | 22.1 km |
| Reid Energy Center, LLC | — | 27.1 km |