Johnsonville
Natural gas power plant in Humphreys County, Tennessee. 1,676 MW of nameplate capacity across 24 generators, operated by Tennessee Valley Authority.
Also known as Johnsonville Combustion Turbine Plant · EIA plant 3406
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1,676 MWNameplate
- Generators
- 24 operatingEIA-860M, August 2026
- Operating since
- June 1975First generator online
- Operator
- Tennessee Valley AuthorityEIA operator ID 18642
- Grid
- TVABalancing authority TVA
- Price nodes
- None linkedNo verified ISO node
- Location
- Humphreys County, TN36.0278, −87.9861
- EIA plant ID
- 3406EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Johnsonville produces
Free · EIA-923Net generation, 2025
1.43 TWh
1,433,228 MWh, final
Capacity factor, 2025
Not reported
2024: 6.2%
January to July 2026
936 GWh
Provisional
Range, 2015 to 2025
0.1–2.1
TWh a year. Low 2019, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 8,659,089 | Not reported | 12 of 12 |
| 2001 | 7,704,576 | Not reported | 12 of 12 |
| 2002 | 1,266,610 | Not reported | 2 of 12 |
| 2003 | 7,927,610 | Not reported | 12 of 12 |
| 2004 | 7,473,011 | Not reported | 12 of 12 |
| 2005 | 7,746,761 | Not reported | 12 of 12 |
| 2006 | 7,657,037 | Not reported | 12 of 12 |
| 2007 | 7,826,625 | Not reported | 12 of 12 |
| 2008 | 3,679,780 | Not reported | 6 of 12 |
| 2009 | 4,529,521 | Not reported | 12 of 12 |
| 2010 | 6,418,456 | 25.2% | 12 of 12 |
| 2011 | 4,792,270 | 18.8% | 12 of 12 |
| 2012 | 3,125,592 | 12.2% | 12 of 12 |
| 2013 | 2,122,058 | 8.3% | 12 of 12 |
| 2014 | 2,137,668 | 8.4% | 12 of 12 |
| 2015 | 2,115,257 | Not reported | 12 of 12 |
| 2016 | 1,679,733 | 9.9% | 12 of 12 |
| 2017 | 1,365,850 | Not reported | 12 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | 140,219 | 1.1% | 12 of 12 |
| 2020 | 571,790 | 4.6% | 12 of 12 |
| 2021 | 743,226 | 5.9% | 12 of 12 |
| 2022 | 845,832 | 6.8% | 12 of 12 |
| 2023 | 590,121 | 5.2% | 11 of 12 |
| 2024 | 781,233 | 6.2% | 12 of 12 |
| 2025 | 1,433,228 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | 936,362 | 11.0% | 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, 2023
493,125
US short tons. 2022: 638,171
SO₂, 2023
15
US short tons
NOx, 2023
106
US short tons
20 of 20 EPA units reported CO₂ in 2023 (1, 10, 2, 3, 4, 5, 6, 7, and others), matched to EIA plant 3406 through the EPA–EIA crosswalk.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| G10 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
| G11 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
| G12 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
| G13 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
| G14 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
| G15 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
| G16 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
| G17 | Natural Gas Fired Combustion Turbine | 84.5 | July 2000 |
| G18 | Natural Gas Fired Combustion Turbine | 84.5 | July 2000 |
| G19 | Natural Gas Fired Combustion Turbine | 84.5 | July 2000 |
| G20 | Natural Gas Fired Combustion Turbine | 84.5 | July 2000 |
| G21 | Natural Gas Fired Combustion Turbine | 65.8 | May 2025 |
| G22 | Natural Gas Fired Combustion Turbine | 65.8 | May 2025 |
| G23 | Natural Gas Fired Combustion Turbine | 65.8 | May 2025 |
| G24 | Natural Gas Fired Combustion Turbine | 65.8 | May 2025 |
| G25 | Natural Gas Fired Combustion Turbine | 65.8 | May 2025 |
| G26 | Natural Gas Fired Combustion Turbine | 65.8 | August 2025 |
| G27 | Natural Gas Fired Combustion Turbine | 65.8 | May 2025 |
| G28 | Natural Gas Fired Combustion Turbine | 65.8 | May 2025 |
| G29 | Natural Gas Fired Combustion Turbine | 65.8 | May 2025 |
| G30 | Natural Gas Fired Combustion Turbine | 65.8 | May 2025 |
| GT1 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
| GT2 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
| GT3 | Natural Gas Fired Combustion Turbine | 68.0 | June 1975 |
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 Tennessee Valley Authority 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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Power plants near Johnsonville
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Questions about Johnsonville
How much power does Johnsonville produce?
Johnsonville reported 1,433,228 MWh (1.43 TWh) of net generation in 2025. From January to July 2026 it reported 936 GWh, which is provisional.
Where is Johnsonville?
Johnsonville is in Humphreys County, Tennessee, at 36.0278, −87.9861. It is in the Tennessee Valley Authority balancing area (TVA).
Who operates Johnsonville?
EIA-860M for August 2026 lists Tennessee Valley Authority as the operator (EIA operator ID 18642). The operator is not always the owner.
When did Johnsonville start operating?
Its first generator began operating in June 1975, 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
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page