Vienna Operations
Other power plant · Dorchester County, Maryland
Nameplate capacity
181 MW
Rank in Maryland
#14
of 234 plants
In service since
1968
January 1968
Details
- Primary fuel
- Other
- Technology
- Petroleum Liquids
- Operator
- NRG Vienna Operations Inc
- County
- Dorchester County
- Generating units
- 2
- Share of state capacity
- 1.36%
- Rank among other plants in Maryland
- #3 of 19
- EIA plant code
- 1564
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 8 | Petroleum Liquids | 162 MW | 153 MW | 1972 | Operating |
| 10 | Petroleum Liquids | 19 MW | 14 MW | 1968 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Maryland
| Brandywine Power Facility | Natural gas | 289 MW |
| Morgantown Generating Plant | Other | 260 MW |
| CPV Backbone Solar | Solar | 175 MW |
| Great Bay Solar 1 | Solar | 118 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 181 MW solar plant and a 181 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Maryland power plants · What Maryland actually generates