Guntersville
Marshall County, Alabama · EIA plant ID 48 · Operator: Tennessee Valley Authority
Nameplate115MWSummer 123 MW
Generators4in service
Net generation509GWh12 mo to Dec 2025
Capacity factor47%hydro units, summer MW
Heat rate—thermal plants only
First online1939
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 | 558.2 | 53.1% | — |
| 2002 | 595.3 | 59.8% | — |
| 2003 | 821.9 | 82.2% | — |
| 2004 | 655.4 | 60.1% | — |
| 2005 | 682.6 | 65.9% | — |
| 2006 | 612.7 | 58.0% | — |
| 2007 | 414.1 | 39.2% | — |
| 2008 | 505.1 | 46.9% | — |
| 2009 | 771.8 | 71.8% | — |
| 2010 | 645.3 | 60.0% | — |
| 2011 | 722 | 67.2% | — |
| 2012 | 666.5 | 61.8% | — |
| 2013 | 839.9 | 78.1% | — |
| 2014 | 713.4 | 66.4% | — |
| 2015 | 740.9 | 68.9% | — |
| 2016 | 506.3 | 47.0% | — |
| 2017 | 724.5 | 67.4% | — |
| 2018 | 733.7 | 68.3% | — |
| 2019 | 667.5 | 62.1% | — |
| 2020 | 941 | 87.3% | — |
| 2021 | 599.3 | 55.8% | — |
| 2022 | 560.7 | 52.2% | — |
| 2023 | 453.4 | 42.2% | — |
| 2024 | 454.8 | 42.2% | — |
| 2025 | 509.1 | 47.4% | — |
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 | 28.8 | 31 | Aug 1939 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 28.8 | 30.6 | Oct 1939 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 28.8 | 29.8 | Dec 1939 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 28.8 | 31.3 | Mar 1952 | 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% | 115 MW |
Nearby plants
Within 80 km.
| Albertville | 4 MW | 16.9 km |
| Redstone Arsenal Hybrid | 11 MW | 29 km |
| Sand Valley Power Station | 5 MW | 49.2 km |
| TAI Huntsville Solar Hybrid | 32 MW | 50.3 km |
| Bellefonte | 14 MW | 53.4 km |
| Gadsden | retired | 59.8 km |