MM Prince William EnergyRetired
Prince William County, Virginia · EIA plant ID 55156 · Operator: MM Prince William Energy LLC
×7 MW other retired since 2020 (latest Dec 2023)
Nameplate—MWSummer — MW
Generators0in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—thermal plants only
First online—
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), primary-fuel 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) |
|---|---|---|---|
| 2002 | 12.6 | 80.7% | — |
| 2003 | 14.6 | 93.8% | — |
| 2004 | 13.8 | 88.4% | — |
| 2005 | 12.5 | 80.3% | — |
| 2006 | 13.3 | 85.2% | — |
| 2007 | 14.2 | 89.8% | — |
| 2008 | 12.9 | 81.7% | — |
| 2009 | 13.7 | 86.8% | — |
| 2010 | 14 | 88.8% | — |
| 2011 | 12.8 | 81.0% | — |
| 2012 | 12.9 | 81.9% | — |
| 2013 | 11.6 | 73.3% | — |
| 2014 | 52.5 | 332.8% | — |
| 2015 | 50.8 | 87.8% | — |
| 2016 | 51.7 | 89.1% | — |
| 2017 | 52.2 | 90.3% | — |
| 2018 | 51 | 88.2% | — |
| 2019 | 51.9 | 89.8% | — |
| 2020 | 51.2 | 88.3% | — |
| 2021 | 50.5 | 87.4% | — |
| 2022 | 47.5 | 82.1% | — |
| 2023 | 43.1 | 81.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| UNT1 | Landfill Gas | IC | 0.9 | 0.9 | Nov 1998 | Retired Dec 2023 | — | coming soon |
| UNT2 | Landfill Gas | IC | 0.9 | 0.9 | Nov 1998 | Retired Dec 2023 | — | coming soon |
| UNT3 | Landfill Gas | IC | 1.6 | 1.6 | Oct 2013 | Retired Dec 2023 | — | coming soon |
| UNT4 | Landfill Gas | IC | 1.6 | 1.6 | Oct 2013 | Retired Dec 2023 | — | coming soon |
| UNT5 | Landfill Gas | IC | 1.6 | 1.6 | Oct 2013 | Retired Dec 2023 | — | coming soon |
Owner / operator
Operator: MM Prince William Energy LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Nearby plants
Within 80 km.
| Gateway Gen | 4 MW | 12.7 km |
| Church Street Plant | 4 MW | 13.3 km |
| Dominion/Lo Mar | 19 MW | 13.8 km |
| VMEA Peaking Gen | 6 MW | 14 km |
| Godwin Drive Plant | 6 MW | 14 km |
| VMEA 1 Credit Gen | 13 MW | 14 km |