Vienna Operations
Dorchester County, Maryland · EIA plant ID 1564 · Operator: NRG Vienna Operations Inc
Nameplate181MWSummer 167 MW
Generators2in service
Net generation13GWh12 mo to Dec 2025
Capacity factor1%gas/coal/oil units, summer MW
Heat rate16,445Btu/kWhfossil units, electric fuel, HHV
First online1968Runs as rarely runs
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) |
|---|---|---|---|
| 2001 | 144.9 | — | — |
| 2002 | 151 | — | — |
| 2003 | 94.8 | 6.4% | 12,320 |
| 2004 | 31.1 | 2.1% | 14,581 |
| 2005 | 91.5 | 6.1% | 12,880 |
| 2006 | 7.4 | 0.5% | 19,313 |
| 2007 | 28 | 1.9% | 14,659 |
| 2008 | 26.8 | 1.8% | 10,347 |
| 2009 | 19.3 | 1.3% | 17,220 |
| 2010 | 8.4 | 0.6% | 18,022 |
| 2011 | 14 | 0.9% | 14,334 |
| 2012 | 2.7 | 0.2% | 24,310 |
| 2013 | 4.4 | 0.3% | 20,021 |
| 2014 | 15.6 | 1.1% | 14,571 |
| 2015 | 11.1 | 0.8% | 17,440 |
| 2016 | 0.7 | 0.1% | — |
| 2017 | -1.4 | -0.1% | — |
| 2018 | 5.5 | 0.4% | 22,665 |
| 2019 | -0.5 | -0.0% | — |
| 2020 | -1.9 | -0.1% | — |
| 2021 | 0.2 | 0.0% | — |
| 2022 | 7.1 | 0.5% | 25,226 |
| 2023 | 2.9 | 0.2% | — |
| 2024 | 4.6 | 0.3% | 23,146 |
| 2025 | 13.2 | 0.9% | 16,445 |
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 |
|---|---|---|---|---|---|---|---|---|
| 10 | Petroleum Liquids | GT | 18.6 | 14.3 | Jan 1968 | Operating | — | coming soon |
| 8 | Petroleum Liquids | ST | 162 | 153 | Jan 1972 | Operating | — | coming soon |
Owner / operator
Operator: NRG Vienna Operations Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Vienna Power LLC | 100.0% | 181 MW |
Nearby plants
Within 80 km.
| Mountain Point- Sharptown | 2 MW | 6.4 km |
| Porter Mill Solar | — | 12.9 km |
| Richfield Solar Energy LLC | 50 MW | 13.5 km |
| Todd Solar | 20 MW | 14 km |
| Wor-Wic Community College - Offsite | 2 MW | 14.1 km |
| Goose Haven | 2 MW | 15 km |