Cumberland (TN)Retirement planned
Stewart County, Tennessee · EIA plant ID 3399 · Operator: Tennessee Valley Authority
778 MW under construction · 778 MW planned (Natural Gas Fired Combined Cycle), first expected Jan 2029 · EIA-860M
Nameplate2,600MWSummer 2,470 MW
Generators2in service · 778 MW building
Net generation9,043GWh12 mo to Aug 2026
Capacity factor42%gas/coal/oil units, summer MW
Heat rate11,692Btu/kWhfossil units, electric fuel, HHV
First online1973Runs as baseload
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
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.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 17,978.9 | 83.4% | 9,742 |
| 2002 | 16,384.1 | 76.2% | 9,819 |
| 2003 | 12,671.8 | 58.7% | 9,749 |
| 2004 | 18,417.1 | 85.1% | 9,716 |
| 2005 | 16,372 | 75.9% | 9,867 |
| 2006 | 18,743.4 | 86.9% | 9,988 |
| 2007 | 16,949 | 78.1% | 10,025 |
| 2008 | 16,294.7 | 74.9% | 9,774 |
| 2009 | 15,873.3 | 73.4% | 9,543 |
| 2010 | 14,062.9 | 65.0% | 10,585 |
| 2011 | 12,921.5 | 59.7% | 10,252 |
| 2012 | 14,449.9 | 66.6% | 10,086 |
| 2013 | 13,568.7 | 62.7% | 10,223 |
| 2014 | 14,501 | 67.0% | 9,986 |
| 2015 | 14,438.6 | 66.7% | 9,966 |
| 2016 | 12,897.7 | 59.5% | 10,258 |
| 2017 | 8,792.8 | 40.6% | 10,418 |
| 2018 | 10,441.1 | 48.3% | 10,160 |
| 2019 | 9,409.3 | 43.5% | 9,312 |
| 2020 | 9,527.4 | 43.9% | 10,173 |
| 2021 | 10,362.1 | 47.9% | 10,819 |
| 2022 | 7,131.5 | 33.0% | 11,329 |
| 2023 | 8,619.5 | 39.8% | 10,924 |
| 2024 | 9,511.8 | 43.8% | 10,216 |
| 2025 | 9,096.1 | 42.0% | 10,272 |
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 ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Steam Coal | ST | 1,300 | 1,239 | Mar 1973 | Operating · retirement planned | Dec 2028 | coming soon |
| 2 | Conventional Steam Coal | ST | 1,300 | 1,231 | Nov 1973 | Operating · retirement planned | Dec 2034 | coming soon |
| CTG1 | Natural Gas Fired Combined Cycle | CT | 454.8 | 372.9 | planned Dec 2034 | Under construction | — | coming soon |
| STG1 | Natural Gas Fired Combined Cycle | CA | 323 | 296.6 | planned Dec 2034 | Under construction | — | coming soon |
| CTG2 | Natural Gas Fired Combined Cycle | CT | 454.8 | 372.9 | planned Jan 2029 | Planned | — | coming soon |
| STG2 | Natural Gas Fired Combined Cycle | CA | 323 | 296.6 | planned Jan 2029 | Planned | — | 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 Authority | 100.0% | 2,600 MW |
Nearby plants
Within 80 km.
| Bi-County Gas Producers | 3 MW | 19.4 km |
| SR Clarksville, LLC | 2 MW | 33.6 km |
| SR Clarksville II, LLC | 5 MW | 33.6 km |
| Cheatham | 36 MW | 39.5 km |
| Johnsonville | 1,676 MW | 50.1 km |
| West Camden | 5 MW | 57.3 km |