Wansley Unit 9
Natural gas power plant in Heard County, Georgia. 594.1 MW of nameplate capacity across 3 generators, operated by Municipal Electric Authority - (GA).
Also known as EIA plant 7946
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Key facts
- Capacity
- 594.1 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- June 2004First generator online
- Operator
- Municipal Electric Authority - (GA)EIA operator ID 13100
- Grid
- SOCOBalancing authority SOCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Heard County, GA33.4083, −85.0403
- EIA plant ID
- 7946EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Wansley Unit 9 produces
Free · EIA-923Net generation, 2025
2.20 TWh
2,201,110 MWh, final
Capacity factor, 2025
42.3%
2024: 66.2%
January to July 2026
2.07 TWh
Provisional
Range, 2015 to 2025
2.1–3.5
TWh a year. Low 2018, high 2024
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | 738,223 | Not reported | 10 of 12 |
| 2005 | 638,132 | Not reported | 12 of 12 |
| 2006 | 710,277 | Not reported | 12 of 12 |
| 2007 | 884,213 | Not reported | 12 of 12 |
| 2008 | 557,020 | Not reported | 12 of 12 |
| 2009 | 1,096,600 | Not reported | 12 of 12 |
| 2010 | 1,056,124 | 21.2% | 12 of 12 |
| 2011 | 1,283,172 | 25.8% | 12 of 12 |
| 2012 | 1,842,437 | 36.9% | 12 of 12 |
| 2013 | 1,533,960 | Not reported | 12 of 12 |
| 2014 | 1,622,571 | 32.6% | 12 of 12 |
| 2015 | 2,701,206 | 54.3% | 12 of 12 |
| 2016 | 2,722,525 | 54.6% | 12 of 12 |
| 2017 | 2,650,322 | Not reported | 12 of 12 |
| 2018 | 2,084,949 | 40.1% | 12 of 12 |
| 2019 | 3,069,769 | 59.0% | 12 of 12 |
| 2020 | 3,153,311 | 60.4% | 12 of 12 |
| 2021 | 2,982,211 | 57.3% | 12 of 12 |
| 2022 | 2,333,887 | 44.8% | 12 of 12 |
| 2023 | 2,968,409 | 57.0% | 12 of 12 |
| 2024 | 3,453,713 | 66.2% | 12 of 12 |
| 2025 | 2,201,110 | 42.3% | 12 of 12 |
| 2026 (provisional, partial year) | 2,073,455 | 68.6% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDCO₂, 2025
948,173
US short tons. 2024: 1.47M
SO₂, 2025
5
US short tons
NOx, 2025
85
US short tons
CO₂ per MWh, calculated
0.43 t
About 862 lb per MWh
2 of 2 EPA units reported CO₂ in 2025 (CT9A, CT9B), matched to EIA plant 7946 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
762
million gallons
Consumption, 2024
598
million gallons
Source
Chattahoochee River
Surface, Fresh. Induced-draft tower
Watershed stress
Very low/none · 0.129
USGS SUI, HUC12 Pink Creek-Chattahoochee River
12 of 12 cooling months report withdrawal. SUI of the source river HUC12 within 3 km. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| CT1 | Natural Gas Fired Combined Cycle | 183.6 | June 2004 |
| CT2 | Natural Gas Fired Combined Cycle | 183.6 | June 2004 |
| ST1 | Natural Gas Fired Combined Cycle | 226.9 | June 2004 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Municipal Electric Authority - (GA) as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Wansley Unit 9
How much power does Wansley Unit 9 produce?
Wansley Unit 9 reported 2,201,110 MWh (2.20 TWh) of net generation in 2025, a 42.3% capacity factor on 594.1 MW of nameplate capacity. From January to July 2026 it reported 2.07 TWh, which is provisional.
Where is Wansley Unit 9?
Wansley Unit 9 is in Heard County, Georgia, at 33.4083, −85.0403. It is in the Southern Company Services, Inc. - Trans balancing area (SOCO).
Who operates Wansley Unit 9?
EIA-860M for August 2026 lists Municipal Electric Authority - (GA) as the operator (EIA operator ID 13100). The operator is not always the owner.
When did Wansley Unit 9 start operating?
Its first generator began operating in June 2004, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page