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Johnsonville — Power plant · Gas, combustion turbine · Tennessee Valley Authority
  • Combustion
  • Operating
  • 10 · 100 · 1,000 MW

Johnsonville

Power plant · Gas, combustion turbine

Key facts

Power plant · Gas, combustion turbineran 10% of 2025 Operating
Capacity
Capacity: sourceEIA-860M · Open licenseMW
Commissioned
1975
Net generation, 2025
1,433,228 MWh
Grid
161 kV to Tennessee Valley Authority (TVA)
Location
Humphreys County, Tennessee

Output

Net generation MWh by year, 2001 to 2026
Fuel burned MMBtu by year, 2001 to 2026
  • Gas
  • Coal
  • Oil

Operations detail

Details

Who’s behind it

Owner
U.S. Government

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Technology
Gas, combustion turbine source: “Natural Gas Fired Combustion Turbine”
Age
51 years since 1975
Unused energy
13,249 GWh 2025Unused energyA lead, not a guarantee: MW × hours × (1 − capacity factor) for the latest year (EIA-923), gas, coal and oil plants only. Air-permit run-hour caps, heat rate (cost to run) and capacity-market or reliability obligations can rule it out.
Heat rate
11,259 Btu/kWh 2025
All 7 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
AttributeValue
Gem
Parents
Name
Tennessee Valley Authority
Share pct
100
Gem entity id
E100000002329
Unit ids
G100001028287, G100001028288, G100001028289, G100001028290, G100001028291, G100001028292, G100001028293, G100001028294, G100001028295, G100001028296
Location id
L100001023646
EPA greenhouse gas reporting (GHGRP)
EPA FRS ID
110000370535
Subparts reported
C, D
NAICS code
221112
Subpart PP (CO2 supply)
No
Subpart RR (geologic sequestration)
No
Subpart UU (CO2 injection)
No
Reporting year
2023
GHGRP facility ID
1000919
Fuel burned (MMBtu), 202516,136,484
Capacity factor, 20250.098
Heat rate (Btu/kWh), 202511,258.8
Net generation (MWh), 20251,433,228.0
Balancing authority codeTVA

Retirement

EIA-860M September 2026StatusSome generators are scheduled to retire; most of the plant's capacity is not, so it is shown as operating. As of EIA-860M for September 2026.
Capacity retired
1,893.2 MW
Generators retired
16
Next scheduled retirement
December 2028
Capacity scheduled to retire
680 MW
Generators scheduled to retire
10
Share of in-service capacity scheduled
41%
Capacity still in service
1,676 MW
GeneratorTechnologyNameplateStateDate
10Conventional Steam Coal172.8 MWRetiredDecember 2015
5Conventional Steam Coal147 MWRetiredDecember 2015
6Conventional Steam Coal147 MWRetiredDecember 2015
7Conventional Steam Coal172.8 MWRetiredDecember 2015
8Conventional Steam Coal172.8 MWRetiredDecember 2015
9Conventional Steam Coal172.8 MWRetiredDecember 2015
1Conventional Steam Coal125 MWRetiredDecember 2017
2Conventional Steam Coal125 MWRetiredDecember 2017
3Conventional Steam Coal125 MWRetiredDecember 2017
4Conventional Steam Coal125 MWRetiredDecember 2017
GT4Natural Gas Fired Combustion Turbine68 MWRetiredMarch 2025
GT5Natural Gas Fired Combustion Turbine68 MWRetiredMarch 2025
GT6Natural Gas Fired Combustion Turbine68 MWRetiredMarch 2025
GT7Natural Gas Fired Combustion Turbine68 MWRetiredMarch 2025
GT8Natural Gas Fired Combustion Turbine68 MWRetiredMarch 2025
GT9Natural Gas Fired Combustion Turbine68 MWRetiredMarch 2025
G10Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
G11Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
G12Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
G13Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
G14Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
G15Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
G16Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
GT1Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
GT2Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
GT3Natural Gas Fired Combustion Turbine68 MWScheduled to retireDecember 2028
By technology
TechnologyRetiredScheduled to retire
Conventional Steam Coal1,485.2 MW
Natural Gas Fired Combustion Turbine408 MW680 MW

Grid

EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).
Grid voltage at the plant
161 kV
Transmission or distribution system owner
Tennessee Valley Authority
Balancing authority
Tennessee Valley Authority
NERC region
SERC
Can the connection be reused?

A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.

Ownership

2 companies2
CompanyRoleAs ofSource
Tennessee Valley Authority Operator EIA-860M
U.S. Government Owner Dec 31, 2023 EPA GHGRP

Timeline

  • Stated Units G10, G11, G12, G13, G14, G15, G16, GT1, GT2, GT3 scheduled to retire, 680 MW · EIA-860M
  • Stated Units GT4, GT5, GT6, GT7, GT8, GT9 scheduled to retire, 408 MW · EIA-860M
  • Stated Units 1, 2, 3, 4 scheduled to retire, 500 MW · EIA-860M
  • Stated Units 10, 5, 6, 7, 8, 9 scheduled to retire, 985.2 MW · EIA-860M
  • In service · EIA-860M

Sources

5 sources

Sources EIA-860M · GEM · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)

Sources

Every source and license · Attribution

View at source