Guntersville
Hydro power plant · Marshall County, Alabama
Nameplate capacity
115 MW
Rank in Alabama
#34
of 80 plants
In service since
1939
August 1939
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Tennessee Valley Authority
- County
- Marshall County
- Generating units
- 4
- Share of state capacity
- 0.35%
- Rank among hydro plants in Alabama
- #11 of 23
- EIA plant code
- 48
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 29 MW | 31 MW | 1939 | Operating |
| 2 | Conventional Hydroelectric | 29 MW | 31 MW | 1939 | Operating |
| 3 | Conventional Hydroelectric | 29 MW | 30 MW | 1939 | Operating |
| 4 | Conventional Hydroelectric | 29 MW | 31 MW | 1952 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Alabama
| Washington County Cogeneration Facility | Natural gas | 123 MW |
| Mead Coated Board | Other | 121 MW |
| International Paper Riverdale Mill | Natural gas | 104 MW |
| Georgia-Pacific Brewton Mill | Other | 103 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 115 MW solar plant and a 115 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Alabama power plants · What Alabama actually generates