St Stephen
Hydro power plant · Berkeley County, South Carolina
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- US Army Corps of Engineers
- County
- Berkeley County
- Generating units
- 3
- Share of state capacity
- 0.31%
- Rank among hydro plants in South Carolina
- #9 of 32
- EIA plant code
- 6789
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 28 MW | 28 MW | 1985 | Operating |
| 2 | Conventional Hydroelectric | 28 MW | 28 MW | 1985 | Operating |
| 3 | Conventional Hydroelectric | 28 MW | 28 MW | 1985 | 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 South Carolina
| Florence Mill | Other | 92 MW |
| Wateree Hydro | Hydro | 91 MW |
| Allora Solar, LLC | Solar | 75 MW |
| Catalina Solar (SC) | Solar | 75 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 84 MW solar plant and a 84 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 South Carolina power plants · What South Carolina actually generates