McWilliams
Covington County, Alabama · EIA plant ID 533 · Operator: PowerSouth Energy Cooperative
Nameplate654MWSummer 650 MW
Generators7in service
Net generation3,422GWh12 mo to Aug 2026
Capacity factor60%gas/coal/oil units, summer MW
Heat rate7,493Btu/kWhfossil units, electric fuel, HHV
First online1954Runs as baseload
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 | 295.5 | — | — |
| 2002 | 1,855.5 | — | — |
| 2003 | 975.2 | 16.7% | 7,923 |
| 2004 | 1,343.1 | 23.5% | 8,101 |
| 2005 | 992.1 | 17.4% | 8,087 |
| 2006 | 1,157.9 | 20.3% | 7,863 |
| 2007 | 1,069.8 | 18.8% | 7,989 |
| 2008 | 1,114.8 | 19.5% | 8,073 |
| 2009 | 2,311.5 | 40.6% | 7,600 |
| 2010 | 2,834.3 | 49.8% | 7,765 |
| 2011 | 2,737.3 | 48.1% | 7,648 |
| 2012 | 3,192.5 | 55.9% | 7,727 |
| 2013 | 3,164.1 | 54.5% | 7,590 |
| 2014 | 3,193.3 | 55.0% | 7,514 |
| 2015 | 4,001.2 | 68.9% | 7,583 |
| 2016 | 3,816.6 | 65.5% | 7,557 |
| 2017 | 4,030.2 | 69.4% | 7,517 |
| 2018 | 3,957.1 | 68.1% | 7,505 |
| 2019 | 3,560.7 | 61.2% | 7,624 |
| 2020 | 4,158.1 | 71.3% | 7,448 |
| 2021 | 3,999.5 | 68.8% | 7,534 |
| 2022 | 3,895.7 | 67.0% | 7,624 |
| 2023 | 3,342.9 | 57.5% | 7,589 |
| 2024 | 2,898.6 | 50.8% | 7,760 |
| 2025 | 3,514.4 | 61.7% | 7,581 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo3,675 MMBtu
Last month with liquid burnApr 2025
Switch while operatingYes
Net summer MW on gas109
Net summer MW on oil109
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Natural Gas Fired Combined Cycle | CA | 7.5 | 8 | Dec 1954 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combined Cycle | CA | 7.5 | 8 | Dec 1954 | Operating | — | coming soon |
| 3 | Natural Gas Fired Combined Cycle | CA | 25 | 15 | Aug 1959 | Operating | — | coming soon |
| 4 | Natural Gas Fired Combined Cycle | CT | 107 | 109 | Dec 1996 | Operating | — | coming soon |
| VAN1 | Natural Gas Fired Combined Cycle | CT | 165 | 168 | Jan 2002 | Operating | — | coming soon |
| VAN2 | Natural Gas Fired Combined Cycle | CT | 165 | 168 | Jan 2002 | Operating | — | coming soon |
| VAN3 | Natural Gas Fired Combined Cycle | CA | 177 | 174 | Jan 2002 | Operating | — | coming soon |
Owner / operator
Operator: PowerSouth Energy Cooperative. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| PowerSouth Energy Cooperative | 100.0% | 654 MW |
Nearby plants
Within 80 km.
| Gantt | 3 MW | 0.4 km |
| Point A | 5 MW | 5.9 km |
| OE_ALD | 80 MW | 45 km |
| Pecan Tree | 75 MW | 56.1 km |
| Swallowtail | 75 MW | 57.9 km |
| Wild Quail | 75 MW | 59.9 km |