15th largest plant in Maryland · 1674th nationally
Vienna Operations is a oil power plant in Maryland with a nameplate capacity of 181 MW. It generates roughly 2.9k MWh per year — enough to power about 276 average U.S. homes.
Its capacity factor of 0% reflects intermittent or peaking operation. At 8374 lb CO₂/MWh, its emission rate sits above the national grid average of roughly 800 lb/MWh.
Ghost bars are each month's theoretical maximum (181 MW nameplate × hours in the month). Filled bars are actual net generation reported to EIA Form 923. The gap between them is capacity factor made visible.
| Plant Name | Vienna Operations |
|---|---|
| Operator | Nrg Vienna Operations Inc |
| City | Vienna |
| County | Dorchester County |
| State | Maryland |
| ZIP | 21869 |
| Coordinates | 38.48780, -75.82080 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 8 | Petroleum Liquids | Residual Oil | 162 MW | Operating | 1972 |
| 10 | Petroleum Liquids | Distillate Oil | 18.6 MW | Operating | 1968 |
| Owner | Location | Share |
|---|---|---|
| Vienna Power Llc | Vienna, MD | 10000.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| CO₂ | 12.2k metric tons |
|---|---|
| SO₂ | 102 metric tons |
| NOₓ | 20 metric tons |
| CO₂ Rate | 8374 lb/MWh |
Annual totals and CO₂ rate reported by EPA eGRID for 2023. Reference averages are approximate U.S.-wide figures from the same dataset.
| NERC Region | RFC |
|---|---|
| Balancing Authority | Pjm Interconnection, Llc |
Oil-fired plants typically run only during peak demand or grid emergencies because oil is expensive compared to gas and coal. They have the highest CO₂ emissions per MWh of any common generation technology.