Williams
Berkeley County, South Carolina · EIA plant ID 3298 · Operator: South Carolina Genertg Co, Inc
×54 MW natural gas retired since 2020 (latest Sep 2022)
Nameplate660MWSummer 605 MW
Generators1in service
Net generation2,521GWh12 mo to Aug 2026
Capacity factor48%gas/coal/oil units, summer MW
Heat rate10,562Btu/kWhfossil units, electric fuel, HHV
First online1973Runs as intermediate
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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 | 4,193.3 | — | — |
| 2002 | 4,428.5 | — | — |
| 2003 | 3,647.3 | 63.6% | 9,454 |
| 2004 | 3,597.1 | 62.5% | 9,512 |
| 2005 | 4,798.4 | 83.6% | 9,463 |
| 2006 | 4,491.5 | 78.3% | 9,546 |
| 2007 | 3,835 | 66.8% | 9,551 |
| 2008 | 4,120.5 | 71.6% | 9,646 |
| 2009 | 3,812.6 | 66.5% | 9,580 |
| 2010 | 3,421.2 | 59.6% | 9,585 |
| 2011 | 2,742.7 | 48.5% | 9,603 |
| 2012 | 3,723 | 65.7% | 9,722 |
| 2013 | 3,344.8 | 59.2% | 9,728 |
| 2014 | 3,705.2 | 65.6% | 9,764 |
| 2015 | 3,735.7 | 66.1% | 9,793 |
| 2016 | 2,992.4 | 52.8% | 9,807 |
| 2017 | 2,608.4 | 46.2% | 9,861 |
| 2018 | 2,963 | 52.4% | 9,996 |
| 2019 | 2,557.4 | 45.3% | 10,238 |
| 2020 | 2,681.5 | 47.3% | 10,281 |
| 2021 | 2,434.2 | 43.1% | 9,908 |
| 2022 | 1,741.9 | 31.5% | 10,424 |
| 2023 | 1,994.1 | 37.6% | 10,448 |
| 2024 | 1,898.6 | 35.7% | 10,946 |
| 2025 | 2,447 | 46.2% | 10,634 |
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 |
|---|---|---|---|---|---|---|---|---|
| ST1 | Conventional Steam Coal | ST | 659.7 | 605 | Jul 1973 | Operating | — | coming soon |
| 1 | Natural Gas Fired Combustion Turbine | GT | 26.9 | 20 | Jun 1972 | Retired Sep 2022 | — | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 26.9 | 20 | Jun 1972 | Retired Sep 2022 | — | coming soon |
Owner / operator
Operator: South Carolina Genertg Co, Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| South Carolina Genertg Co, Inc | 100.0% | 660 MW |
Nearby plants
Within 80 km.
| Bushy Park Combustion Turbine Facility | 65 MW | 0.1 km |
| Kapstone | retired | 13.3 km |
| Berkeley County Landfill | 3 MW | 15 km |
| Hagood | 177 MW | 21.3 km |
| Jefferies | 145 MW | 26.1 km |
| Pinopolis BESS | — | 26.2 km |