💧 Hydroelectric Power Plants in Idaho
Idaho operates 77 hydroelectric power plants totaling 2,696 MW of nameplate capacity. Annual generation: 8.4M 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.
Plants77operating
Capacity2,696 MWnameplate
Generation8.4M MWhannual
All Idaho hydroelectric plants
| Plant | City | County | Capacity | Operator |
|---|---|---|---|---|
| Brownlee | Cambridge | Washington County | 675 MW | Idaho Power Co |
| Dworshak | Ahsahka | Clearwater County | 465 MW | Usace Northwestern Division |
| Cabinet Gorge | Clark Fork | Bonner County | 265 MW | Avista Corp |
| Palisades Dam | Palisades | Bonneville County | 176 MW | U S Bureau Of Reclamation |
| Lucky Peak Power Plant Project | Boise | Ada County | 101 MW | Boise-Kuna Irrigation District |
| American Falls | American Falls | Power County | 92 MW | Idaho Power Co |
| C J Strike | Bruneau | Owyhee County | 83 MW | Idaho Power Co |
| Bliss (Id) | Bliss | Gooding County | 75 MW | Idaho Power Co |
| Lower Salmon | Hagerman | Gooding County | 60 MW | Idaho Power Co |
| Milner Hydro | Murtaugh | Cassia County | 60 MW | Idaho Power Co |
| Twin Falls (Id) | Kimberly | Twin Falls County | 53 MW | Idaho Power Co |
| Albeni Falls | Oldtown | Bonner County | 42 MW | Usace Northwestern Division |
| Anderson Ranch | Mountain Home | Elmore County | 40 MW | U S Bureau Of Reclamation |
| Smith Falls Hydro Project | Bonners Ferry | Boundary County | 38 MW | Smith Creek Hydro, Llc |
| Grace | Grace | Caribou County | 33 MW | Pacificorp |
| Oneida | Riverdale | Franklin County | 30 MW | Pacificorp |
| Minidoka | Rupert | Minidoka County | 28 MW | U S Bureau Of Reclamation |
| Swan Falls | Kuna | Ada County | 27 MW | Idaho Power Co |
| Gem State | Idaho Falls | Bonneville County | 23 MW | City Of Idaho Falls - (Id) |
| Upper Salmon A | Hagerman | Twin Falls County | 18 MW | Idaho Power Co |
| Upper Salmon B | Hagerman | Twin Falls County | 17 MW | Idaho Power Co |
| Arrowrock Hydroelectric Project | Boise | Elmore County | 15 MW | Boise-Kuna Irrigation District |
| Shoshone Falls | Twin Falls | Jerome County | 15 MW | Idaho Power Co |
| Soda | Soda Springs | Caribou County | 15 MW | Pacificorp |
| Post Falls | Post Falls | Kootenai County | 15 MW | Avista Corp |
| Lower Malad | Hagerman | Gooding County | 14 MW | Idaho Power Co |
| Cascade Dam (Id) | Cascade | Valley County | 12 MW | Idaho Power Co |
| Black Canyon | Emmet | Gem County | 10 MW | U S Bureau Of Reclamation |
| Bypass | Hazelton | Jerome County | 10 MW | North Side Energy Company |
| Horseshoe Bend Hydroelectric Co | Horseshoe Bend | Boise County | 9 MW | Horseshoe Bend Hydroelectric Co |
| Magic Dam Hydroelectric Project | Shoshone | Blaine County | 9 MW | Wood Hydro, Llc |
| Falls River Hydro | Ashton | Fremont County | 9 MW | Marysville Hydro Partners |
| S E Hazelton A | Hazelton | Jerome County | 9 MW | North Side Energy Company |
| Wilson Lake Hydroelectric Project | Eden | Jerome County | 8 MW | Hazelton/Wilson Joint Venture |
| Upper Malad | Hagerman | Gooding County | 8 MW | Idaho Power Co |
| City Power Plant | Idaho Falls | Bonneville County | 8 MW | City Of Idaho Falls - (Id) |
| Upper Power Plant | Idaho Falls | Bonneville County | 8 MW | City Of Idaho Falls - (Id) |
| Lower No 1 | Idaho Falls | Bonneville County | 8 MW | City Of Idaho Falls - (Id) |
| South Forks Hydro | Hansen | Twin Falls County | 8 MW | South Forks Joint Venture |
| Hazelton B Hydro | Hazelton | Jerome County | 8 MW | Hazelton/Wilson Joint Venture |
| Felt | Felt | Teton County | 7 MW | Fall River Rural Elec Coop Inc |
| Thousand Springs | Wendell | Gooding County | 7 MW | Idaho Power Co |
| Ashton | Ashton | Fremont County | 7 MW | Pacificorp |
| Island Park | Island Park | Fremont County | 5 MW | Fall River Rural Elec Coop Inc |
| Dietrich Drop | Shoshone | Lincoln County | 5 MW | Wood Hydro, Llc |
| Barber Dam | Boise | Ada County | 4 MW | Barber Pool Hydro Llc |
| Moyie Springs | Moyie Springs | Boundary County | 4 MW | City Of Bonners Ferry |
| Dry Creek Project | Howe | Butte County | 4 MW | Dry Creek Llc |
| Chester Diversion Hydroelectric Project | Chester | Fremont County | 4 MW | Fall River Rural Elec Coop Inc |
| Boise R Diversion | Boise | Ada County | 3 MW | U S Bureau Of Reclamation |
| Mink Creek Hydro | Preston | Franklin County | 3 MW | Mink Creek Hydro Entity |
| Lower No 2 | Idaho Falls | Bonneville County | 3 MW | City Of Idaho Falls - (Id) |
| Low Line Rapids | Kimberly | Twin Falls County | 3 MW | Lower Lowline Llc |
| Little Wood Hydro Project | Carey | Blaine County | 3 MW | Littlewood Irrigation District |
| Birch Creek Power | Terreton | Clark County | 3 MW | Birch Power Co |
| El Dorado Hydro Elk Creek | New Meadows | Idaho County | 3 MW | Hydroland Omega Llc |
| Clear Lake | Buhl | Gooding County | 3 MW | Idaho Power Co |
| Lateral 10 Ventures | Buhl | Twin Falls County | 2 MW | Lateral 10 Ventures |
| Crystal Springs | Filer | Twin Falls County | 2 MW | Crystal Springs Hydro Elec Lp |
| Mc6 Hydro Facility | Kuna | Ada County | 2 MW | Mc6 Hydro Facility |
| Rock Creek I | Twin Falls | Twin Falls County | 2 MW | Shorock Hydro Inc |
| Rock Creek Ii | Twin Falls | Twin Falls County | 2 MW | Hydroland Omega Llc |
| Last Chance | Grace | Caribou County | 2 MW | Pacificorp |
| Mora Drop Hydroelectric Project | Kuna | Ada County | 2 MW | Boise-Kuna Irrigation District |
| Marsh Valley Development | Mccammon | Bannock County | 2 MW | Marsh Valley Development Inc |
| Little Mac Project | Buhl | Twin Falls County | 2 MW | Little Mac Power Company |
| Mile 28 Water Power Project | Eden | Jerome County | 1 MW | Wood Hydro, Llc |
| Koyle Ranch Hydroelectric Project | Gooding | Gooding County | 1 MW | Koyle Hydro Inc |
| Blind Canyon Hydro | Wendell | Gooding County | 1 MW | Blind Canyon Aquaranch, Inc. |
| North Gooding Main Hydro | Gooding | Gooding County | 1 MW | North Gooding Main Hydro Llc |
| Marco Ranch | Jerome | Jerome County | 1 MW | Marco Power Inc |
| Ford Hydro Lp | Weippe | Clearwater County | 1 MW | Ford Hydro Ltd Partnership |
| Head Of U Canal Hydro Project | Jerome | Jerome County | 1 MW | North Side Energy Company |
| Ajms, Llc | Shoshone | Lincoln County | 1 MW | Ajms, Llc |
| Fargo Drop | Wilder | Canyon County | 1 MW | Riverside Investments Llc |
| Geobon Ii | Shoshone | Lincoln County | 1 MW | Koosh, Inc. |
| Cove | Grace | Caribou County | — | Pacificorp |