💧 Hydroelectric Power Plants in Hawaii
Hawaii operates 8 hydroelectric power plants totaling 35 MW of nameplate capacity. Annual generation: 93.3k MWh.
Hydroelectric plants spin turbines using falling or flowing water — typically from a dam-impounded reservoir. They are dispatchable, long-lived, and emission-free at the point of generation, though large reservoirs can disrupt rivers and ecosystems and methane can be released from flooded vegetation.
Plants8operating
Capacity34 MWnameplate
Generation93.3k MWhannual
All Hawaii hydroelectric plants
| Plant | City | County | Capacity | Operator |
|---|---|---|---|---|
| Wailuku River Hydroelectric | Hilo | Hawaii County | 10 MW | Wailuku Holding Company Llc |
| Gay Robinson | Kaumakani | Kauai County | 9 MW | Gay & Robinson Inc |
| Kaheka Hydro | Puunene | Maui County | 5 MW | Mahi Pono Llc |
| Wainiha Hydro | Hanalei | Kauai County | 4 MW | Bbcp Kauai Operating Llc |
| Puueo | Hilo | Hawaii County | 3 MW | Hawaii Electric Light Co Inc |
| Kalaheo Hydro | Kalaheo | Kauai County | 2 MW | Bbcp Kauai Operating Llc |
| Paia Hydroelectric Plant | Paia | Maui County | 1 MW | Mahi Pono Llc |
| Waiau Hydro | Hilo | Hawaii County | 1 MW | Hawaii Electric Light Co Inc |