Hydroelectric power plants in Oregon
60 operating hydroelectric power plants in Oregon with 6,620 MW of hydroelectric capacity, largest first. From EIA-860M, August 2026.
Largest hydroelectric power plants in Oregon
| # | Plant | Hydroelectric MW | GWh, 2025 | Capacity factor |
|---|---|---|---|---|
| 1 | John DaySherman County | 1,485 | 7,589 | 40.1% |
| 2 | The DallesWasco County | 1,206 | 5,933 | 37.2% |
| 3 | BonnevilleMultnomah County | 980 | 3,722 | 36.6% |
| 4 | McNaryUmatilla County | 851 | 4,016 | 46.3% |
| 5 | Hells CanyonWallowa County | 411 | 2,025 | 56.2% |
| 6 | Round ButteJefferson County | 373 | 772 | 23.7% |
| 7 | Oxbow (OR)Baker County | 190 | 990 | 59.5% |
| 8 | Lookout PointLane County | 120 | 227 | 21.6% |
| 9 | PeltonJefferson County | 110 | 400 | 41.6% |
| 10 | DetroitMarion County | 100 | 227 | 25.9% |
| 11 | Green PeterLinn County | 80 | 116 | 16.5% |
| 12 | Carmen SmithLinn County | 62 | 168 | 16.8% |
| 13 | Lost CreekJackson County | 49 | 221 | 51.5% |
| 14 | Lemolo 2Douglas County | 44 | 150 | 39.1% |
| 15 | Toketee FallsDouglas County | 43 | 208 | 55.9% |
| 16 | North ForkClackamas County | 41 | 164 | 45.9% |
| 17 | FaradayClackamas County | 37 | 133 | 40.9% |
| 18 | Lemolo 1Douglas County | 32 | 120 | 42.8% |
| 19 | Prospect 2Jackson County | 32 | 180 | 64.2% |
| 20 | Hills CreekLane County | 30 | 116 | 44.1% |
| 21 | Clearwater 2Douglas County | 26 | 30.5 | 13.4% |
| 22 | CougarLane County | 26 | 72.3 | 31.8% |
| 23 | PHP 1Multnomah County | 24 | 37.6 | 18.1% |
| 24 | FosterLinn County | 20 | 65.2 | 37.2% |
| 25 | Warm Springs Power EnterprisesJefferson County | 20 | 70.5 | 41.1% |
| 26 | River MillClackamas County | 19 | 77.3 | 46.9% |
| 27 | Slide CreekDouglas County | 18 | 57.0 | 36.2% |
| 28 | Green SpringsJackson County | 17 | 34.5 | 22.9% |
| 29 | SullivanClackamas County | 15 | 84.6 | 62.7% |
| 30 | Clearwater 1Douglas County | 15 | 35.0 | 26.6% |
| 31 | DexterLane County | 15 | 43.2 | 32.9% |
| 32 | Stone CreekClackamas County | 12 | 54.4 | 51.8% |
| 33 | PHP 2Clackamas County | 12 | 25.8 | 24.9% |
| 34 | Fish CreekDouglas County | 11 | 29.2 | 30.3% |
| 35 | Soda SpringsDouglas County | 11 | 51.9 | 53.9% |
| 36 | Tunnel 1 Power ProjectMalheur County | 8.5 | 21.1 | 28.3% |
| 37 | Dorena Hydro-Electric FacilityLane County | 7.5 | 8.5 | 13.0% |
| 38 | Prospect 3Jackson County | 7.2 | −0.2 | – |
| 39 | Dalles Dam North Fishway ProjectWasco County | 6.5 | 43.4 | 76.2% |
| 40 | Siphon Power ProjectDeschutes County | 5.4 | 19.0 | 40.1% |
| 41 | Owyhee Dam Power ProjectMalheur County | 5.0 | 28.2 | 64.3% |
| 42 | Juniper Ridge Hydroelectric ProjectDeschutes County | 5.0 | 12.7 | 28.9% |
| 43 | Opal Springs HydroJefferson County | 4.3 | 28.0 | 74.3% |
| 44 | Falls CreekLinn County | 4.1 | 11.8 | 32.9% |
| 45 | Prospect 1Jackson County | 3.8 | 0.0 | – |
| 46 | Middle Fork Irrigation DistrictHood River County | 3.3 | 20.0 | 69.1% |
| 47 | East SideKlamath County | 3.2 | 0.0 | – |
| 48 | 45 Mile Hydroelectric ProjectJefferson County | 3.0 | 5.0 | 19.2% |
| 49 | Eagle PointJackson County | 2.8 | 14.8 | 60.2% |
| 50 | Copper Dam PlantHood River County | 2.6 | 14.6 | 64.0% |
| 51 | Michell Butte Power ProjectMalheur County | 2.0 | 6.6 | 37.5% |
| 52 | Peters Drive PlantHood River County | 1.8 | 6.9 | 43.8% |
| 53 | Galesville ProjectDouglas County | 1.6 | 4.4 | 31.1% |
| 54 | Sprague HydroKlamath County | 1.2 | 1.1 | 10.7% |
| 55 | Timothy Lake PowerhouseClackamas County | 1.2 | 1.8 | 16.8% |
| 56 | Wallowa FallsWallowa County | 1.1 | 2.9 | 29.6% |
| 57 | BendDeschutes County | 1.1 | 0.8 | 8.3% |
| 58 | C-Drop HydroKlamath County | 1.1 | 1.5 | 15.2% |
| 59 | Prospect 4Jackson County | 1.0 | −0.1 | – |
| 60 | Lacomb Irrigation DistrictLinn County | 1.0 | 3.8 | 43.9% |
Projects where hydroelectric is the largest fuel or at least a fifth of nameplate capacity. MW is hydroelectric nameplate only; net generation covers the whole project. Source: EIA-860M August 2026, published 2026-09-24, and EIA-923 2025. Page updated 2026-10-04. Data sources