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1676 MW Natural Gas operating in Humphreys, TN
1,676 MW
Nameplate Capacity
24
Generators
units
Natural Gas Fired Combustion Turbine
Technology
1975
Operating Since
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Tennessee Valley Authority | Tennessee Valley Authority | — |
| Owner(s) | Tennessee Valley Authority | Tennessee Valley Authority | Tennessee Valley Authority |
| Status | Operating | — | — |
The Johnsonville Combustion Turbine Plant is a 1.2-gigawatt, simple cycle natural gas power plant located in New Johnsonville, Tennessee in Humphreys County, Tennessee. It is operated by the Tennessee Valley Authority (TVA).
Read more on WikipediaThe Johnsonville plant is a 1,676 MW natural gas-fired power plant located in Humphreys County, Tennessee. It is owned and operated by the Tennessee Valley Authority (TVA). The plant began operating in 1975 and consists of 24 natural gas-fired combustion turbine generators. Johnsonville is the fourth-largest power plant in Tennessee out of nine total plants, and ranks 49th nationally out of 945 plants. It operates within the Tennessee Valley Authority balancing authority area and the SERC NERC region.
In the most recent year of data, the Johnsonville plant generated 1,433,228 MWh of electricity, achieving a capacity factor of 9.8%. The plant is tracked in energy industry news, with 10 recent articles, including 6 related to industry trends and 4 related to grid operations.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Tennessee Valley Authority (TVA)
Grid Voltage
161.0 kV
Regulatory Status
RE — Regulated
Entity Type
Federal
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
190.4K MWh
Latest Month
1.4M MWh
Annual Generation
9.8%
Capacity Factor
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CO₂ Intensity
1671 lb/MWh
NOx
0.368 lb/MWh
SO₂
0.052 lb/MWh
CH₄
0.031 lb/MWh
N₂O
0.003 lb/MWh
Capacity Factor
4.7%
Annual Net Gen
590 GWh
CO₂eq
1673 lb/MWh
Subregion
SERC Tennessee Valley
2013
$965/kW
Est. Construction Cost
Total estimated cost: $1.6B
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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This plant's balancing authority participates in the Southeast Energy Exchange Market (SEEM). SEEM is a bilateral exchange — no public nodal pricing.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-14
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