Directory of Power Plants in Idaho
| Plant Name | Utility | Location | Balancing Authority | Annual Generation | Plant Date | Last Update | Fuel Types |
|---|---|---|---|---|---|---|---|
| Cascade Dam | Idaho Power Co | Cascade, ID | Idaho Power Company (IPCO) | 37.4 GWh | Nov 1983 | Dec 2024 | Water |
| Koyle Ranch Hydroelectric Project | Koyle Hydro Inc | Gooding, ID | Idaho Power Company (IPCO) | 3.8 GWh | Nov 1983 | Oct 2024 | Water |
| Rock Creek I | Shorock Hydro Inc | Twin Falls, ID | Idaho Power Company (IPCO) | 10.6 GWh | Aug 1983 | Dec 2024 | Water |
| Tamarack Energy | Tamarack Energy | New Meadows, ID | Idaho Power Company (IPCO) | 13.7 GWh | May 1983 | Apr 2025 | Wood/Wood Waste Solids |
| Upper Power Plant | City of Idaho Falls - (ID) | Idaho Falls, ID | PacifiCorp East (PACE) | 44.9 GWh | Aug 1982 | Dec 2024 | Water |
| City Power Plant | City of Idaho Falls - (ID) | Idaho Falls, ID | PacifiCorp East (PACE) | 40.4 GWh | Jun 1982 | Dec 2024 | Water |
| Lower No 1 | City of Idaho Falls - (ID) | Idaho Falls, ID | PacifiCorp East (PACE) | 38.9 GWh | Mar 1982 | Dec 2024 | Water |
| American Falls | Idaho Power Co | American Falls, ID | Idaho Power Company (IPCO) | 242.4 GWh | Feb 1978 | Oct 2024 | Water |
| Dworshak | USACE Northwestern Division | Ahsahka, ID | Bonneville Power Administration (BPAT) | 1.4 TWh | Aug 1974 | Dec 2024 | Water |
| Salmon Diesel | Idaho Power Co | Salmon, ID | Idaho Power Company (IPCO) | 54.0 MWh | Nov 1967 | Feb 2025 | Distillate Fuel Oil |
| Brownlee | Idaho Power Co | Cambridge, ID | Idaho Power Company (IPCO) | 2.2 TWh | Jul 1958 | Dec 2024 | Water |
| Palisades Dam | U S Bureau of Reclamation | Palisades, ID | Bonneville Power Administration (BPAT) | 744.4 GWh | Jan 1957 | Dec 2024 | Water |
| Albeni Falls | USACE Northwestern Division | Oldtown, ID | Bonneville Power Administration (BPAT) | 179.3 GWh | Apr 1955 | Dec 2024 | Water |
| Cabinet Gorge | Avista Corp | Clark Fork, ID | Avista Corporation (AVA) | 857.6 GWh | Aug 1952 | Dec 2024 | Water |
| C J Strike | Idaho Power Co | Bruneau, ID | Idaho Power Company (IPCO) | 422.3 GWh | Feb 1952 | Dec 2024 | Water |
| Anderson Ranch | U S Bureau of Reclamation | Mountain Home, ID | Bonneville Power Administration (BPAT) | 130.0 GWh | Nov 1950 | Dec 2024 | Water |
| Clearwater Paper IPP Lewiston | Clearwater Paper Corporation | Lewiston, ID | Avista Corporation (AVA) | 395.3 GWh | Dec 1949 | Apr 2025 | Black Liquor : 56.2% Wood/Wood Waste Solids : 24.7% Natural Gas : 19.1% |
| Bliss | Idaho Power Co | Bliss, ID | Idaho Power Company (IPCO) | 332.6 GWh | Oct 1949 | Dec 2024 | Water |
| Lower Salmon | Idaho Power Co | Hagerman, ID | Idaho Power Company (IPCO) | 232.0 GWh | Jan 1949 | Dec 2024 | Water |
| Amalgamated Sugar Twin Falls | The Amalgamated Sugar Co | Twin Falls, ID | Idaho Power Company (IPCO) | 28.5 GWh | Nov 1948 | Dec 2024 | Natural Gas |
| Lower Malad | Idaho Power Co | Hagerman, ID | Idaho Power Company (IPCO) | 102.0 GWh | Sep 1948 | Dec 2024 | Water |
| Amalgamated Sugar LLC Nampa | Amalgamated Sugar Co-Nampa | Nampa, ID | Idaho Power Company (IPCO) | 49.3 GWh | Sep 1948 | Dec 2023 | Natural Gas |
| Upper Malad | Idaho Power Co | Hagerman, ID | Idaho Power Company (IPCO) | 58.3 GWh | May 1948 | Dec 2024 | Water |
| Upper Salmon B | Idaho Power Co | Hagerman, ID | Idaho Power Company (IPCO) | 102.3 GWh | Aug 1947 | Dec 2024 | Water |
| Felt | Fall River Rural Elec Coop Inc | Felt, ID | PacifiCorp East (PACE) | 27.8 GWh | Aug 1946 | Dec 2024 | Water |
| Lower No 2 | City of Idaho Falls - (ID) | Idaho Falls, ID | PacifiCorp East (PACE) | 5.4 GWh | Jul 1940 | Oct 2024 | Water |
| Clear Lake | Idaho Power Co | Buhl, ID | Idaho Power Company (IPCO) | 16.7 GWh | Nov 1937 | Dec 2024 | Water |
| Upper Salmon A | Idaho Power Co | Hagerman, ID | Idaho Power Company (IPCO) | 108.0 GWh | Aug 1937 | Dec 2024 | Water |
| Twin Falls (ID) | Idaho Power Co | Kimberly, ID | Idaho Power Company (IPCO) | 101.0 GWh | Feb 1935 | Dec 2024 | Water |
| Minidoka | U S Bureau of Reclamation | Rupert, ID | Bonneville Power Administration (BPAT) | 111.7 GWh | May 1927 | Dec 2024 | Water |
| Black Canyon | U S Bureau of Reclamation | Emmet, ID | Bonneville Power Administration (BPAT) | 58.8 GWh | Nov 1925 | Dec 2024 | Water |
| Soda | PacifiCorp | Soda Springs, ID | PacifiCorp East (PACE) | 19.1 GWh | Jun 1924 | Dec 2024 | Water |
| Grace | PacifiCorp | Grace, ID | PacifiCorp East (PACE) | 88.1 GWh | Jun 1923 | Dec 2024 | Water |
| Moyie Springs | City of Bonners Ferry | Moyie Springs, ID | Bonneville Power Administration (BPAT) | 20.9 GWh | Nov 1921 | Dec 2024 | Water |
| Ashton | PacifiCorp | Ashton, ID | PacifiCorp East (PACE) | 32.6 GWh | Jun 1917 | Dec 2024 | Water |
| Oneida | PacifiCorp | Riverdale, ID | PacifiCorp East (PACE) | 42.0 GWh | Jun 1915 | Dec 2024 | Water |
| Thousand Springs | Idaho Power Co | Wendell, ID | Idaho Power Company (IPCO) | 54.2 GWh | Jul 1912 | Dec 2023 | Water |
| Shoshone Falls | Idaho Power Co | Twin Falls, ID | Idaho Power Company (IPCO) | 71.3 GWh | Jul 1907 | Dec 2024 | Water |
| Post Falls | Avista Corp | Post Falls, ID | Avista Corporation (AVA) | 69.1 GWh | Jun 1906 | Dec 2024 | Water |
| Matrix Pleasant Valley | Pleasant Valley Solar, LLC | Boise, ID | Idaho Power Company (IPCO) | 90.2 GWh | - | Apr 2025 | Solar |
Browse Power Plants By Idaho Counties
Figures are based on February 2025 generation numbers.| County | State Rank | Active Plants | Feb 2025 Generation |
|---|---|---|---|
| Lemhi County, ID | # 35 | 1 | 54.0 MWh |
| Jefferson County, ID | # 34 | 1 | 9.2 GWh |
| Butte County, ID | # 33 | 1 | 10.1 GWh |
| Clark County, ID | # 32 | 2 | 12.6 GWh |
| Adams County, ID | # 31 | 1 | 13.7 GWh |
| Lincoln County, ID | # 30 | 3 | 15.7 GWh |
| Blaine County, ID | # 29 | 2 | 24.7 GWh |
| Teton County, ID | # 28 | 2 | 27.8 GWh |
| Valley County, ID | # 27 | 1 | 37.4 GWh |
| Madison County, ID | # 26 | 1 | 39.9 GWh |
| Boise County, ID | # 25 | 1 | 42.0 GWh |
| Franklin County, ID | # 24 | 2 | 53.0 GWh |
| Canyon County, ID | # 23 | 4 | 53.2 GWh |
| Gem County, ID | # 22 | 2 | 58.8 GWh |
| Bannock County, ID | # 21 | 4 | 90.5 GWh |
| Boundary County, ID | # 20 | 2 | 103.9 GWh |
| Fremont County, ID | # 19 | 4 | 105.9 GWh |
| Caribou County, ID | # 18 | 4 | 111.6 GWh |
| County | State Rank | Active Plants | Feb 2025 Generation |
|---|---|---|---|
| Minidoka County, ID | # 17 | 2 | 111.7 GWh |
| Jerome County, ID | # 16 | 13 | 188.4 GWh |
| Cassia County, ID | # 15 | 10 | 367.0 GWh |
| Nez Perce County, ID | # 14 | 1 | 395.3 GWh |
| Owyhee County, ID | # 13 | 3 | 460.8 GWh |
| Bingham County, ID | # 12 | 2 | 466.6 GWh |
| Ada County, ID | # 11 | 13 | 675.9 GWh |
| Power County, ID | # 10 | 6 | 696.4 GWh |
| Gooding County, ID | # 9 | 14 | 845.4 GWh |
| Bonner County, ID | # 8 | 2 | 1.0 TWh |
| Clearwater County, ID | # 7 | 2 | 1.4 TWh |
| Twin Falls County, ID | # 6 | 40 | 1.4 TWh |
| Payette County, ID | # 5 | 1 | 1.7 TWh |
| Bonneville County, ID | # 4 | 13 | 2.0 TWh |
| Washington County, ID | # 3 | 2 | 2.2 TWh |
| Kootenai County, ID | # 2 | 4 | 2.3 TWh |
| Elmore County, ID | # 1 | 26 | 3.1 TWh |