AOC, Capitol Power Plant
District of Columbia County, District of Columbia · EIA plant ID 63347 · Operator: Architect of the Capitol, Capitol Power Plant
Nameplate8MWSummer 8 MW
Generators1in service
Net generation54GWh12 mo to Dec 2025
Capacity factor83%gas/coal/oil units, summer MW
Heat rate11,605Btu/kWhfossil units, electric fuel, HHV
First online2018Runs as baseload
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) |
|---|---|---|---|
| 2019 | 57 | 86.8% | 11,605 |
| 2020 | 56.6 | 86.0% | 11,605 |
| 2021 | 54.7 | 83.2% | 11,605 |
| 2022 | 51.5 | 78.4% | 11,605 |
| 2023 | 49.4 | 75.2% | 11,605 |
| 2024 | 54.5 | 82.7% | 11,605 |
| 2025 | 54.4 | 82.8% | 11,605 |
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 mo12,268 MMBtu
Last month with liquid burnDec 2025
Switch while operatingYes
Net summer MW on gas8
Net summer MW on oil7
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 |
|---|---|---|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combustion Turbine | GT | 7.5 | 7.5 | Aug 2018 | Operating | — | coming soon |
Owner / operator
Operator: Architect of the Capitol, Capitol Power Plant. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Architect of the Capitol, Capitol Power Plant | 100.0% | 8 MW |
Nearby plants
Within 80 km.
| Nationals | 1 MW | 1 km |
| US GSA Heating and Transmission | 11 MW | 1.8 km |
| WMATA - Anacostia CSG | 1 MW | 2.3 km |
| Gallaudet Uni Community Solar | 2 MW | 3 km |
| JBAB - Washington DC | 6 MW | 3.3 km |
| DC Water | 1 MW | 3.4 km |