Commonwealth Chesapeake
Accomack County, Virginia · EIA plant ID 55381 · Operator: Commonwealth Chesapeake Co LLC
Nameplate415MWSummer 315 MW
Generators7in service
Net generation101GWh12 mo to Aug 2026
Capacity factor4%gas/coal/oil units, summer MW
Heat rate9,906Btu/kWhfossil units, electric fuel, HHV
First online2000Runs as rarely runs
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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) |
|---|---|---|---|
| 2002 | 120.5 | 4.4% | 9,663 |
| 2003 | 215.6 | 7.9% | 9,815 |
| 2004 | 140.9 | 5.1% | 9,981 |
| 2005 | 100.6 | 3.7% | 10,427 |
| 2006 | 41.6 | 1.5% | 10,474 |
| 2007 | 46.4 | 1.7% | 10,270 |
| 2008 | 37.5 | 1.4% | 10,609 |
| 2009 | 21.4 | 0.8% | 10,305 |
| 2010 | 52.9 | 1.9% | 10,173 |
| 2011 | 31.4 | 1.1% | 10,190 |
| 2012 | 75.5 | 2.7% | 10,033 |
| 2013 | 41.4 | 1.5% | 10,456 |
| 2014 | 155.2 | 5.5% | 9,925 |
| 2015 | 134.1 | 4.8% | 9,862 |
| 2016 | 100.5 | 3.6% | 10,107 |
| 2017 | 72.1 | 2.6% | 10,168 |
| 2018 | 104.5 | 3.7% | 9,880 |
| 2019 | 13.8 | 0.5% | 11,314 |
| 2020 | 23.9 | 0.9% | 10,272 |
| 2021 | 37.8 | 1.4% | 10,063 |
| 2022 | 55.9 | 2.0% | 10,013 |
| 2023 | 22.9 | 0.8% | 10,258 |
| 2024 | 23.4 | 0.8% | 11,020 |
| 2025 | 44.2 | 1.6% | 10,598 |
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 | Petroleum Liquids | GT | 57.5 | 45.4 | Aug 2000 | Operating | — | coming soon |
| UNT2 | Petroleum Liquids | GT | 57.5 | 44.3 | Sep 2000 | Operating | — | coming soon |
| UNT3 | Petroleum Liquids | GT | 57.5 | 45.8 | Sep 2000 | Operating | — | coming soon |
| UNT4 | Petroleum Liquids | GT | 60.5 | 43.3 | Jun 2001 | Operating | — | coming soon |
| UNT5 | Petroleum Liquids | GT | 60.5 | 45.8 | Jun 2001 | Operating | — | coming soon |
| UNT6 | Petroleum Liquids | GT | 60.5 | 45.5 | Jun 2001 | Operating | — | coming soon |
| UNT7 | Petroleum Liquids | GT | 60.5 | 45.2 | Aug 2001 | Operating | — | coming soon |
Owner / operator
Operator: Commonwealth Chesapeake Co LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Commonwealth Chesapeake Co LLC | 100.0% | 415 MW |
Nearby plants
Within 80 km.
| Eastern Shore Solar, LLC | 80 MW | 5.7 km |
| NASA Wallops Flight Facility Solar | 4 MW | 8.1 km |
| Costen Solar | 9 MW | 13.6 km |
| UMMS at Pocomoke | 3 MW | 13.6 km |
| Eastern Correctional Institute | 6 MW | 23.7 km |
| Great Bay Solar 1 | 118 MW | 24.3 km |