Directory of Power Plants in Idaho
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Brownlee | Idaho Power Co | Cambridge, ID | Idaho Power Company (IPCO) | 2.3 TWh | Jul 1958 | Dec 2025 | Water |
| Bliss (ID) | Idaho Power Co | Bliss, ID | Idaho Power Company (IPCO) | 297.7 GWh | Oct 1949 | Dec 2025 | Water |
| American Falls | Idaho Power Co | American Falls, ID | Idaho Power Company (IPCO) | 206.3 GWh | Feb 1978 | Dec 2025 | Water |
| Mile 28 Water Power Project | Wood Hydro, LLC | Eden, ID | Idaho Power Company (IPCO) | 5.3 GWh | May 1994 | Oct 2025 | Water |
| Rock Creek I | Shorock Hydro Inc | Twin Falls, ID | Idaho Power Company (IPCO) | 86.0 MWh | Aug 1983 | Dec 2025 | Water |
| Wilson Lake Hydroelectric Project | Hazelton/Wilson Joint Venture | Eden, ID | Idaho Power Company (IPCO) | 27.3 GWh | Apr 1993 | Oct 2025 | Water |
| Little Wood Hydro Project | Littlewood Irrigation District | Carey, ID | Idaho Power Company (IPCO) | 2.5 GWh | Jan 1985 | Aug 2025 | Water |
| Blind Canyon Hydro | Blind Canyon Aquaranch, Inc. | Wendell, ID | Idaho Power Company (IPCO) | 3.7 GWh | Mar 1992 | Oct 2025 | Water |
| Horseshoe Bend Hydroelectric Co | Horseshoe Bend Hydroelectric Co | Horseshoe Bend, ID | Idaho Power Company (IPCO) | 46.8 GWh | Mar 1995 | Dec 2025 | Water |
| S E Hazelton A | North Side Energy Company | Hazelton, ID | Idaho Power Company (IPCO) | 24.9 GWh | May 1990 | Oct 2025 | Water |
| Hazelton B Hydro | Hazelton/Wilson Joint Venture | Hazelton, ID | Idaho Power Company (IPCO) | 23.3 GWh | Mar 1993 | Oct 2025 | Water |
| Lateral 10 Ventures | Lateral 10 Ventures | Buhl, ID | Idaho Power Company (IPCO) | 565.0 MWh | Oct 1984 | Dec 2025 | Water |
| Bypass | North Side Energy Company | Hazelton, ID | Idaho Power Company (IPCO) | 28.2 GWh | Feb 1987 | Oct 2025 | Water |
| GeoBon II | Koosh, Inc. | Shoshone, ID | Idaho Power Company (IPCO) | 54.0 MWh | Aug 1986 | Oct 2025 | Water |
| Bennett Mountain | Idaho Power Co | Mountain Home, ID | Idaho Power Company (IPCO) | 999.1 GWh | Mar 2005 | Dec 2025 | Natural Gas |
| Koyle Ranch Hydroelectric Project | Koyle Hydro Inc | Gooding, ID | Idaho Power Company (IPCO) | 3.4 GWh | Nov 1983 | Oct 2025 | Water |
| Marco Ranch | Marco Power Inc | Jerome, ID | Idaho Power Company (IPCO) | 2.5 GWh | Jul 1985 | Oct 2025 | Water |
| Simplot Leasing Don Plant | Simplot Leasing Corp | Pocatello, ID | Idaho Power Company (IPCO) | 73.2 GWh | Jan 1986 | May 2026 | Waste Heat |
| Tamarack Energy | Tamarack Energy | New Meadows, ID | Idaho Power Company (IPCO) | 13.7 GWh | May 1983 | May 2026 | Wood/Wood Waste Solids |
| Low Line Rapids | Lower Lowline LLC | Kimberly, ID | Idaho Power Company (IPCO) | 8.3 GWh | Jul 1990 | Dec 2025 | Water |
| Dietrich Drop | Wood Hydro, LLC | Shoshone, ID | Idaho Power Company (IPCO) | 11.9 GWh | Jul 1990 | Oct 2025 | Water |
| Crystal Springs | Crystal Springs Hydro Elec LP | Filer, ID | Idaho Power Company (IPCO) | 8.5 GWh | Dec 1987 | Dec 2025 | Water |
| Raft River Geothermal Power Plant | US Geothermal Inc. | Malta, ID | Bonneville Power Administration (BPAT) | 88.1 GWh | Dec 2007 | Dec 2025 | Geothermal |
| Falls River Hydro | Marysville Hydro Partners | Ashton, ID | Bonneville Power Administration (BPAT) | 43.2 GWh | Jul 1993 | Dec 2025 | Water |
| Chester Diversion Hydroelectric Project | Fall River Rural Elec Coop Inc | Chester, ID | Bonneville Power Administration (BPAT) | 6.9 GWh | Apr 2014 | May 2026 | Water |
| Smith Falls Hydro Project | Smith Creek Hydro, LLC | Bonners Ferry, ID | Bonneville Power Administration (BPAT) | 87.2 GWh | Nov 1989 | Dec 2025 | Water |
| Dworshak | USACE Northwestern Division | Ahsahka, ID | Bonneville Power Administration (BPAT) | 1.5 TWh | Aug 1974 | Dec 2025 | Water |
| Palisades Dam | U S Bureau of Reclamation | Palisades, ID | Bonneville Power Administration (BPAT) | 657.3 GWh | Jan 1957 | Dec 2025 | Water |
| Albeni Falls | USACE Northwestern Division | Oldtown, ID | Bonneville Power Administration (BPAT) | 177.0 GWh | Apr 1955 | Dec 2025 | Water |
| Island Park | Fall River Rural Elec Coop Inc | Island Park, ID | Bonneville Power Administration (BPAT) | 9.7 GWh | Mar 1994 | Dec 2025 | Water |
| Anderson Ranch | U S Bureau of Reclamation | Mountain Home, ID | Bonneville Power Administration (BPAT) | 85.8 GWh | Nov 1950 | Dec 2025 | Water |
| Black Canyon | U S Bureau of Reclamation | Emmet, ID | Bonneville Power Administration (BPAT) | 62.9 GWh | Nov 1925 | Dec 2025 | Water |
| Minidoka | U S Bureau of Reclamation | Rupert, ID | Bonneville Power Administration (BPAT) | 98.8 GWh | May 1927 | Dec 2025 | Water |
| Moyie Springs | City of Bonners Ferry (ID) | Moyie Springs, ID | Bonneville Power Administration (BPAT) | 21.4 GWh | Nov 1921 | Dec 2025 | Water |
| Horse Butte Wind I, LLC | Utah Associated Mun Power Sys | Iona, ID | Bonneville Power Administration (BPAT) | 158.0 GWh | Jul 2012 | Dec 2025 | Wind |
| Cabinet Gorge | Avista Corp | Clark Fork, ID | Avista Corporation (AVA) | 886.3 GWh | Aug 1952 | Dec 2025 | Water |
| Post Falls | Avista Corp | Post Falls, ID | Avista Corporation (AVA) | 60.4 GWh | Jun 1906 | Dec 2025 | Water |
| Ford Hydro LP | Ford Hydro Ltd Partnership | Weippe, ID | Avista Corporation (AVA) | 3.1 GWh | Feb 1988 | Dec 2025 | Water |
| Fighting Creek LFGTE Plant | Kootenai Renewable Energy LLC | Coeur d'Alene, ID | Avista Corporation (AVA) | 21.8 GWh | Feb 2012 | Dec 2025 | Landfill Gas |
| Rathdrum Power LLC | Rathdrum Power LLC | Rathdrum, ID | Avista Corporation (AVA) | 1.7 TWh | Aug 2001 | Dec 2025 | Natural Gas |
| Rathdrum | Avista Corp | Rathdrum, ID | Avista Corporation (AVA) | 793.2 GWh | Oct 1994 | Dec 2025 | Natural Gas |
| Clearwater Paper IPP Lewiston | Clearwater Paper Corporation | Lewiston, ID | Avista Corporation (AVA) | 473.0 GWh | Dec 1949 | May 2026 | Black Liquor : 60.7% Wood/Wood Waste Solids : 23.2% Natural Gas : 16.1% |
Browse Power Plants By Idaho Counties
Figures are based on May 2026 generation numbers.| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Lemhi County, ID | # 35 | 1 | 56.0 MWh |
| Butte County, ID | # 34 | 1 | 7.8 GWh |
| Jefferson County, ID | # 33 | 1 | 9.2 GWh |
| Clark County, ID | # 32 | 2 | 10.4 GWh |
| Adams County, ID | # 31 | 1 | 13.7 GWh |
| Lincoln County, ID | # 30 | 3 | 15.3 GWh |
| Blaine County, ID | # 29 | 2 | 16.8 GWh |
| Teton County, ID | # 28 | 2 | 24.2 GWh |
| Madison County, ID | # 27 | 1 | 37.7 GWh |
| Canyon County, ID | # 26 | 4 | 39.5 GWh |
| Valley County, ID | # 25 | 1 | 40.3 GWh |
| Boise County, ID | # 24 | 1 | 46.8 GWh |
| Franklin County, ID | # 23 | 2 | 48.1 GWh |
| Gem County, ID | # 22 | 2 | 62.9 GWh |
| Fremont County, ID | # 21 | 4 | 87.8 GWh |
| Bannock County, ID | # 20 | 4 | 89.2 GWh |
| Minidoka County, ID | # 19 | 2 | 98.8 GWh |
| Caribou County, ID | # 18 | 4 | 102.4 GWh |
| County | State Rank | Active Plants | May 2026 Generation |
|---|---|---|---|
| Boundary County, ID | # 17 | 2 | 108.6 GWh |
| Jerome County, ID | # 16 | 13 | 168.0 GWh |
| Cassia County, ID | # 15 | 10 | 282.9 GWh |
| Owyhee County, ID | # 14 | 3 | 401.1 GWh |
| Nez Perce County, ID | # 13 | 1 | 473.0 GWh |
| Bingham County, ID | # 12 | 2 | 504.9 GWh |
| Power County, ID | # 11 | 6 | 635.3 GWh |
| Gooding County, ID | # 10 | 14 | 773.4 GWh |
| Bonner County, ID | # 9 | 2 | 1.1 TWh |
| Ada County, ID | # 8 | 14 | 1.2 TWh |
| Twin Falls County, ID | # 7 | 40 | 1.3 TWh |
| Clearwater County, ID | # 6 | 2 | 1.5 TWh |
| Payette County, ID | # 5 | 1 | 1.7 TWh |
| Bonneville County, ID | # 4 | 13 | 1.8 TWh |
| Washington County, ID | # 3 | 2 | 2.3 TWh |
| Kootenai County, ID | # 2 | 4 | 2.6 TWh |
| Elmore County, ID | # 1 | 26 | 2.9 TWh |