Vienna Operations — United States of America
Oil power plant in Maryland, United States of America. Approximate location 38.4878, -75.8208.
OilMarylandUnited States of AmericaSteamCO₂ modelled
Vienna Operations is a 162 MW oil power station in Maryland, United States of America. It is operated by NRG Vienna Operations Inc. Based on its capacity (estimated), it can supply roughly 122k homes (estimated). It ranks #2191 of 10,884 United States of America power plants by installed capacity. Commissioned in 1971, it is around 55 years old — an older, legacy facility. Its modelled annual emissions are 118,614 t CO₂/yr (Climate TRACE), equivalent to about 28k cars driven for a year. In context, oil supplies about 0.7% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0001564.
Data status
Known data
Modelled source data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Capacity provenance
The public capacity above is the current source-record value. A 2026 tracker candidate lists 162 MW for Vienna Operations power station, but it is not used as the public primary value until scope is verified (unit vs operating vs installed/project total).
Data provenance
Source of the capacity and fuel values:
capacity: GEM · 2026 · L100000409301; fuel: WRI GPPD
In context: how this plant compares
At 162 MW, Vienna Operations is well above the median oil plant in United States of America (7.2 MW). Technically it is described as Steam. Oil-fired plants burn heavy fuel oil or diesel, usually as peaking or backup capacity on islands and grids without gas pipelines; high fuel cost keeps their utilisation low.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
~118,614 t CO₂/yr (modelled) — in everyday terms
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; modelled emissions from Climate TRACE.
Key facts
- Generation trend
- 4 GWh in 2013 and 6 GWh in 2018 (+25%)
- Highest and lowest year
- 2014: 16 GWh; 2016: 1 GWh
- Share of United States of America oil capacity
- 0.4% of 40,022 MW across 902 plants in this dataset
- Age among peers
- 137 of 877 dated oil plants in United States of America are older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Reported generation trend
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by NRG Vienna Operations Inc.
Local climate & thermal context
This oil plant burns oil or diesel to drive turbines or reciprocating engines. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 38.5°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 9% below the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 47/100 — this site sits in the mid third of the power plants we cover by heating degree-days.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
Site climate & environmental severity
This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
How it compares & nearby plants
The #45 largest oil power plant of 902 in United States of America by capacity.
United States of America has 902 oil power plants in this dataset, together about 40,022 MW of capacity.
Nearby power plants
- Wor-Wic Community College - Offsite · Solar · 2 MW · Maryland
- Longview Solar · Solar · 13.6 MW · Maryland
- CNE at Cambridge MD · Solar · 3.2 MW · Maryland
- Wicomico · Waste · 5.4 MW · Maryland
- Perdue Salisbury Photovoltaic · Solar · 1 MW · Maryland
- UMCES Ground Mount · Solar · 2 MW · Maryland
Location
Coordinates 38.4878, -75.8208 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Vienna Operations?
Vienna Operations is a 162 MW oil power plant in Maryland, United States of America, commissioned in 1971.
Who operates Vienna Operations?
Vienna Operations is operated by NRG Vienna Operations Inc.
How much CO₂ does Vienna Operations emit?
Vienna Operations has modelled emissions of about 118,614 tonnes of CO₂ per year (Climate TRACE).