Mountain Island
Hydro power plant · Gaston County, North Carolina
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Duke Energy Carolinas, LLC
- County
- Gaston County
- Generating units
- 4
- Share of state capacity
- 0.15%
- Rank among hydro plants in North Carolina
- #10 of 38
- EIA plant code
- 2728
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 15 MW | 17 MW | 2023 | Operating |
| 2 | Conventional Hydroelectric | 15 MW | 17 MW | 2023 | Operating |
| 3 | Conventional Hydroelectric | 15 MW | 17 MW | 2023 | Operating |
| 4 | Conventional Hydroelectric | 15 MW | 17 MW | 2023 | 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 North Carolina
| Warsaw Farm | Solar | 65 MW |
| Summit Farms Solar | Solar | 62 MW |
| Ranchland Solar, LLC | Solar | 60 MW |
| Sugar Solar, LLC | Solar | 60 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 60 MW solar plant and a 60 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 North Carolina power plants · What North Carolina actually generates