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Johnsonville

Humphreys County, Tennessee · EIA plant ID 3406 · Operator: Tennessee Valley Authority
Natural gasNatural Gas Fired Combustion Turbine⛽ Dual-fuelBA: TVA

×408 MW natural gas retired since 2020 (latest Mar 2025)

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Nameplate1,676MWSummer 1,292 MW
Generators24in service
Net generation1,571GWh12 mo to Aug 2026
Capacity factor14%gas/coal/oil units, summer MW
Heat rate11,171Btu/kWhfossil units, electric fuel, HHV
First online1975Runs as peaking

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
0200400600800GWh2001200320052007200920112013201520172019202120232025

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.
0%20%40%2005201020152020202513.9% · 12 mo

Heat rate by year

Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
5,00010,00015,00020,00025,0002005201020152020202511,171 Btu/kWh · 12 mo
Annual data table
YearNet GWhCapacity factorHeat rate (Btu/kWh)
20017,704.6——
20028,323.3——
20037,927.638.8%10,816
20047,47336.3%10,531
20057,746.838.9%11,115
20067,65737.4%11,121
20077,826.638.3%11,051
20087,440.436.2%11,040
20094,529.522.1%11,533
20106,418.531.3%11,556
20114,792.323.4%11,871
20123,125.615.8%12,158
20132,122.110.8%14,133
20142,137.710.8%11,865
20152,115.311.1%12,195
20161,679.713.0%12,136
20171,365.910.8%12,743
2018321.93.5%25,766
2019140.21.5%—
2020571.86.2%14,894
2021743.28.1%13,162
2022845.89.2%13,556
2023590.16.5%13,905
2024781.28.5%13,761
20251,433.214.2%11,259

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 mo107,235 MMBtu
Last month with liquid burnAug 2026
Switch while operatingNo
Net summer MW on gas762
Net summer MW on oil803
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 IDTechnologyPrime moverNameplate MWSummer MWOnlineStatusPlanned retirementOEM / model
G10Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
G11Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
G12Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
G13Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
G14Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
G15Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
G16Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
G17Natural Gas Fired Combustion TurbineGT84.572.8Jul 2000Operating—coming soon
G18Natural Gas Fired Combustion TurbineGT84.572.8Jul 2000Operating—coming soon
G19Natural Gas Fired Combustion TurbineGT84.572.8Jul 2000Operating—coming soon
G20Natural Gas Fired Combustion TurbineGT84.572.8Jul 2000Operating—coming soon
G21Natural Gas Fired Combustion TurbineGT65.853May 2025Operating—coming soon
G22Natural Gas Fired Combustion TurbineGT65.853May 2025Operating—coming soon
G23Natural Gas Fired Combustion TurbineGT65.853May 2025Operating—coming soon
G24Natural Gas Fired Combustion TurbineGT65.853May 2025Operating—coming soon
G25Natural Gas Fired Combustion TurbineGT65.853May 2025Operating—coming soon
G26Natural Gas Fired Combustion TurbineGT65.853Aug 2025Operating—coming soon
G27Natural Gas Fired Combustion TurbineGT65.853May 2025Operating—coming soon
G28Natural Gas Fired Combustion TurbineGT65.853May 2025Operating—coming soon
G29Natural Gas Fired Combustion TurbineGT65.853May 2025Operating—coming soon
G30Natural Gas Fired Combustion TurbineGT65.853May 2025Operating—coming soon
GT1Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
GT2Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
GT3Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Operating · retirement plannedDec 2028coming soon
1Conventional Steam CoalST125107Oct 1951Retired Dec 2017—coming soon
10Conventional Steam CoalST172.8141Aug 1959Retired Dec 2015—coming soon
2Conventional Steam CoalST125107Nov 1951Retired Dec 2017—coming soon
3Conventional Steam CoalST125107Feb 1952Retired Dec 2017—coming soon
4Conventional Steam CoalST125107Apr 1952Retired Dec 2017—coming soon
5Conventional Steam CoalST147107Nov 1952Retired Dec 2015—coming soon
6Conventional Steam CoalST147107Feb 1953Retired Dec 2015—coming soon
7Conventional Steam CoalST172.8141Nov 1958Retired Dec 2015—coming soon
8Conventional Steam CoalST172.8141Jan 1959Retired Dec 2015—coming soon
9Conventional Steam CoalST172.8141Jun 1959Retired Dec 2015—coming soon
GT4Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Retired Mar 2025—coming soon
GT5Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Retired Mar 2025—coming soon
GT6Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Retired Mar 2025—coming soon
GT7Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Retired Mar 2025—coming soon
GT8Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Retired Mar 2025—coming soon
GT9Natural Gas Fired Combustion TurbineGT6847.1Jun 1975Retired Mar 2025—coming soon

Owner / operator

Operator: Tennessee Valley Authority. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Tennessee Valley Authority100.0%1,676 MW

Nearby plants

Within 80 km.
West Camden5 MW14.4 km
SR Benton3 MW22.6 km
SR Lexington7 MW48.6 km
Cumberland (TN)2,600 MW50.1 km
SR Puryear—54.8 km
SR Paris7 MW55.7 km