Clarence Cannon
Hydro power plant · Ralls County, Missouri
Nameplate capacity
58 MW
Rank in Missouri
#55
of 139 plants
In service since
1984
November 1984
Details
- Primary fuel
- Hydro
- Technology
- Hydroelectric Pumped Storage
- Operator
- USCE-St Louis District
- County
- Ralls County
- Generating units
- 2
- Share of state capacity
- 0.25%
- Rank among hydro plants in Missouri
- #5 of 8
- EIA plant code
- 6140
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 2 | Hydroelectric Pumped Storage | 31 MW | 31 MW | 1984 | Operating |
| 1 | Conventional Hydroelectric | 27 MW | 27 MW | 1984 | 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 Missouri
| Mexico | Other | 61 MW |
| Moberly | Other | 61 MW |
| Bluegrass Ridge | Wind | 57 MW |
| Unionville | Other | 53 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 58 MW solar plant and a 58 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 Missouri power plants · What Missouri actually generates