Nickajack
Marion County, Tennessee · EIA plant ID 3409 · Operator: Tennessee Valley Authority
Nameplate104MWSummer 106 MW
Generators4in service
Net generation578GWh12 mo to Dec 2025
Capacity factor62%hydro units, summer MW
Heat rate—thermal plants only
First online1968
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), hydro 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.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 468.2 | 55.7% | — |
| 2002 | 501.1 | 54.4% | — |
| 2003 | 690.2 | 74.9% | — |
| 2004 | 612.6 | 66.3% | — |
| 2005 | 604.7 | 65.0% | — |
| 2006 | 495.5 | 53.6% | — |
| 2007 | 338.6 | 39.2% | — |
| 2008 | 390.3 | 43.5% | — |
| 2009 | 595.4 | 66.6% | — |
| 2010 | 492.4 | 55.0% | — |
| 2011 | 538.6 | 58.2% | — |
| 2012 | 530.7 | 57.2% | — |
| 2013 | 731.7 | 79.1% | — |
| 2014 | 570.9 | 61.7% | — |
| 2015 | 617 | 66.7% | — |
| 2016 | 430 | 46.4% | — |
| 2017 | 609.2 | 65.8% | — |
| 2018 | 570.9 | 61.7% | — |
| 2019 | 585 | 63.2% | — |
| 2020 | 718.9 | 77.5% | — |
| 2021 | 555.3 | 60.0% | — |
| 2022 | 520.6 | 56.3% | — |
| 2023 | 509.6 | 55.1% | — |
| 2024 | 491.2 | 52.9% | — |
| 2025 | 577.6 | 62.4% | — |
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 Hydroelectric | HY | 27.4 | 28.3 | Apr 1968 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 27.9 | 27.3 | Apr 1968 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 24.3 | 25 | Feb 1968 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 24.3 | 25 | Feb 1968 | Operating | — | 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% | 104 MW |
Nearby plants
Within 80 km.
| Crawfish Creek Energy Storage | — | 19.5 km |
| Raccoon Mountain | 1,714 MW | 22.1 km |
| Chickamauga | 160 MW | 37.4 km |
| Chattanooga Metropolitan Airport Solar | 3 MW | 37.7 km |
| Bellefonte | 14 MW | 42.9 km |
| Volkswagen Solar System | 8 MW | 46.3 km |