Williams — United States of America
Coal power plant in South Carolina, United States of America. Approximate location 33.0158, -79.9297.
CoalSouth CarolinaUnited States of America
Williams is a 713.5 MW coal power station in South Carolina, United States of America. It is operated by South Carolina Genertg Co Inc. Based on reported annual generation of 2,557 GWh, it can supply roughly 731k homes. It ranks #882 of 10,884 United States of America power plants by installed capacity. Commissioned in 1972, it is around 54 years old — an older, legacy facility. In context, coal supplies about 16.3% 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 USA0003298.
Data status
Known 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 633 MW for Williams 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 · L100000104181; fuel: WRI GPPD
In context: how this plant compares
At 713.5 MW, Williams is well above the median coal plant in United States of America (558 MW). Coal plants burn pulverised coal to raise high-pressure steam for a turbine; they run as baseload but are the most carbon-intensive mainstream source and the first targeted for retirement or efficiency retrofits.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Key facts
- Load factor
- 41%, from 2,557 GWh of reported generation, in line with the 41% median for 244 coal plants in United States of America
- Generation trend
- 3,345 GWh in 2013 and 2,557 GWh in 2019 (−24%)
- Highest and lowest year
- 2015: 3,736 GWh; 2019: 2,557 GWh
- Share of United States of America coal capacity
- 0.1% of 621,194 MW across 802 plants in this dataset
- Age among peers
- 333 of 745 dated coal 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 South Carolina Genertg Co Inc.
Local climate & thermal context
This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a humid subtropical climate (Köppen Cfa) — Northern Hemisphere, latitude 33.0°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 61% 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: 26/100 — this site sits in the bottom 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 an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt corrosion 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 #324 largest coal power plant of 802 in United States of America by capacity.
United States of America has 802 coal power plants in this dataset, together about 621,194 MW of capacity.
Nearby power plants
- Bushy Park Combustion Turbine Facility · Gas · 65.4 MW · South Carolina
- Williams Station · Coal · 632.7 MW · South Carolina
- Kapstone · Waste · 99.2 MW · South Carolina
- Kapstone Power Plant · Coal · 99.2 MW · South Carolina
- Berkeley County Landfill · Waste · 3.2 MW · South Carolina
- Hagood · Gas · 177.3 MW · South Carolina
Location
Coordinates 33.0158, -79.9297 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Williams?
Williams is a 713.5 MW coal power plant in South Carolina, United States of America, commissioned in 1972.
How much electricity does Williams generate?
Williams generates about 2,557 GWh of electricity per year.
Who operates Williams?
Williams is operated by South Carolina Genertg Co Inc.