Dam Name Owner Type Year Started Location State Capacity Website Recreation
Albeni Falls: Pend Oreille River, ID U.S. Army Corps of Engineers Federal 1955 Pend Oreille River Idaho 42.0 MW http://www.nws.usace.army.mil/PublicMenu/Menu.cfm?sitename=albeni&pagename=DamInformation Boat Launch Area, Boat Ramp, Camping Area, Picnic Area, Tailwater Fishing Facility
Alcova: North Platte River, WY Bureau of Reclamation Federal 1935 North Platte River Wyoming 36 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Alcova+Dam&groupName=Overview Boat Ramp, Camping Area, Fishing Pier, Hunting Area, Picnic Area, Trails, Wildlife Area
Alder: Nisqually River, WA Tacoma Power Municipal 1945 Nisqually River Washington 50.0 MW http://www.mytpu.org/tacomapower/ Boat Launch Area, Boat Ramp, Camping Area, Park, Picnic Area, Playground Area, Swimming Area, Tent, Trailer Sites
American Falls: Snake River, ID Idaho Power IOU 1978 Snake River Idaho 92.4 MW Access Area, Boat Launch Area, Boat Ramp, Fishing Pier, Picnic Area
Amy Ranch: Deep Creek, ID A.J. Amy Independent 1987 Deep Creek Idaho 0.7 MW
Anderson Ranch: Boise River, ID Bureau of Reclamation Federal 1950 Boise River Idaho 40.0 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Anderson+Ranch+Dam
Arrowrock: Boise River, ID Boise-Kuna Irrigation District Independent 2010 Boise River Idaho 15.0 MW
Ashton: Henrys Fork, ID PacifiCorp IOU 1917 Henrys Fork Idaho 6.8 MW Access Area, Boat Launch Area, Boat Ramp, Park, Picnic Area
Atlanta Power Station: Boise River, M Fork, ID Atlanta Power Co. Inc. IOU 1910 Boise River, M Fork Idaho 0.2 MW
Barber Dam: Boise River, ID Ada Co. and Fulcrum Inc. Independent 1990 Boise River Idaho 4.1 MW
Barney Creek: Barney Creek, MT T.K. and J.L. Budde Independent 1986 Barney Creek Montana 0.1 MW
Bell Mountain: Bell Mt. Creek & Mahogany Bell Mountain Power Independent 2009 Bell Mt. Creek & Mahogany Idaho 0.3 MW
Bend Power: Deschutes River PacifiCorp IOU 1913 Deschutes River Oregon 1.1 MW http://www.pacificorp.com/index.html
Big Cliff: N. Fork Santiam River, OR U.S. Army Corps of Engineers Federal 1954 N. Fk. Santiam River Oregon 18.0 MW http://www.nwp.usace.army.mil/locations/bigcliff.asp
Big Fork: Swan River, MT PacifiCorp IOU Swan River Montana 4.1 MW
Big Sheep Creek: Big Sheep Creek, WA G.M. Phillips Independent 1986 Washington 1.6 MW
Billingsley Creek: Billingsley Creek, ID Trout-Co. Inc. Independent 1986 Billingsley Creek CaliforniaIdaho 0.3 MW
Birch Creek B: Birch Creek, ID Independent 1984 Birch Creek Idaho 0.1 MW
Birch Creek: Birch Creek, ID Birch Power Co. and T.S. Sorenson Independent 1986 Birch Creek Idaho 2.6 MW
Black Canyon No. 3: N. Gooding Main Canal, ID W. and S. Brown Independent 1983 N. Gooding Main Canal Idaho 0.1 MW
Black Canyon: Payette River, ID Bureau of Reclamation Federal 1986 Payette River Idaho 10.2 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Black+Canyon+Diversion+Dam
Black Creek: Black Creek, WA Black Creek Hydro Inc. Independent 1994 Black Creek Washington 3.7 MW
Black Eagle: Missouri River, MT PPL Montana Independent 1927 Missouri River Montana 24.0 MW Interpretive Display, Overlook, Park, Picnic Area, Playground Area, Trails
Blind Canyon: Blind Canyon Spring, ID Blind Canyon Aquaranch Independent 1992 Blind Canyon Spring Idaho 1.3 MW
Bliss: Snake River, ID Idaho Power IOU 1949 Snake River Idaho 75.0 MW Access Area, Boat Launch Area, Boat Ramp, Park, Picnic Area
Boise River Diversion: Boise River, ID Bureau of Reclamation Federal 1912 Boise River Idaho 3.3 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Boise+River+Diversion+Dam&groupName=General
Bonneville: Columbia River, OR/WA U.S. Army Corps of Engineers 1938 Columbia River OregonWashington 1227 MW http://www.nwp.usace.army.mil/bonneville/ Picnic Area, Tailwater Fishing Facility, Visitor Center
Boulder Creek: Boulder Creek, MT Salish and Kootenai Tribes Independent 1984 Boulder Creek Montana .4 MW
Boundary: Pend Oreille River, WA Seattle City Light Municipal 1967 Pend Oreille River Washington 1030.8 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Interpretive Display, Overlook, Picnic Area, Swimming Area, Tent, Trailer Sites, Trails, Visitor Center, Wildlife Area
Box Canyon: Box Canyon Spring, ID Clear Springs Trout Co. Independent 1983 Box Canyon Spring Idaho 0.6 MW
Box Canyon: Mt. Shasta, CA Synergics Inc. Independent 1986 Mt. Shasta California 5.0
Box Canyon: Pend Oreille River, WA Pend Oreille PUD PUD 1956 Pend Oreille River Washington 77 MW http://www.popud.org/box-canyon-celebrates-completion-of-first-new-turbines Access Area, Boat Launch Area, Boat Ramp, Camping Area, Cottages, Cabins, Food Services, Hunting Area, Marina, Organizational, Groups, Overlook, Park, Picnic Area, Playground Area, Tent, Trailer Sites, Trails, Visitor Center
Boysen: Wind River, WY Bureau of Reclamation Federal 1947 Wind River Wyoming 15 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Boysen+Dam&groupName=General
Briggs Creek: Briggs Creek, ID R. Kaster Independent 1985 Briggs Creek Idaho 0.8 MW
Briggs: Teton Canal, ID Briggs Hydroelectric Independent 1986 Teton Canal Idaho 0.3 MW
Broadwater (aka Toston): Missouri River, MT State of Montana; Dry Creek LLC Independent 1989 Missouri River Montana 9.7 MW
Brownlee: Snake River, ID/OR Idaho Power IOU 1958 Snake River IdahoOregon 585.4 MW
Buffalo River: Buffalo River, ID Fall River REA Coop 1936 Buffalo River Idaho 0.3 MW
Bull Run: Bull Run River, OR City of Portland Independent 1982 Bull Run River Oregon 23.7 MW http://www.portlandonline.com/
Bull Run: Bull Run River, OR City of Portland Independent 1982 Bull Run River Oregon 11.8 MW http://www.portlandonline.com/
Bull Run: Sandy River, OR Portland General Electric IOU 1912 Sandy River Oregon 20.8 MW http://www.portlandgeneral.com/default.aspx Access Area, Boat Launch Area, Boat Ramp, Food Services, Park, Picnic Area, Playground Area, Swimming Area
Burton Creek: Burton Creek, WA G. Peters Independent 1996 Washington .8 MW
Bypass: N. Side Main Canal, ID ENEL Spa Independent 1987 N. Side Main Canal Idaho 9.9 MW
Canal Creek: Wallowa Valley Imp. Dist. Canal, OR Joseph Hydro Assoc. Independent 1984 Wallowa Valley Imp. Dist. Cnl. Oregon 1.1 MW
Canyon Creek: Canyon Creek, OR Douglas Power Water Company Independent 1985 Canyon Creek Oregon 0.1 MW
Canyon Ferry: Missouri River, MT Bureau of Reclamation Federal 1953 Missouri River Montana 49.8 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Canyon+Ferry+Dam
Carmen-Smith: McKenzie River, OR Eugene Water and Electric Board Municipal 1963 McKenzie River Oregon 114.3 MW http://www.eweb.org/ Access Area, Boat Launch Area, Boat Ramp, Camping Area, Picnic Area, Tailwater Fishing Facility, Tent, Trailer Sites
Cascade Creek: Cascade Creek, MT M. Ranch Independent 1983 Cascade Creek Montana 0.1 MW
Cascade: Payette River N. Fork, ID Idaho Power IOU 1926 Payette River N. Fork Idaho 12.4 MW Access Area
Cedar Draw Creek: Cedar Draw Creek, ID LP Independent 1988 Cedar Draw Creek Idaho 2.3 MW
Cedar Falls: Cedar Falls, WA Seattle City Light Municipal 1905 Cedar River Washington 20 MW Boat Launch Area, Interpretive Display, Visitor Center
Central Oregon Siphon: Deschutes River, OR Central Oregon Irrigation District Independent 1989 Deschutes River Oregon 5.4 MW
Chandler: Yakima River, WA Bureau of Reclamation Federal 1927 Yakima River Washington 12.0 MW http://www.usbr.gov/projects/Powerplant.jsp?fac_Name=Chandler+Powerplant
Chester Diversion: Henrys Fork, ID Fall River REA Coop 2011 Henrys Fork Idaho 3.3 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Food Services, Interpretive Display, Marina, Park, Picnic Area, Tent, Trailer Sites, Wildlife Area
Chief Joseph: Columbia River, WA U.S. Army Corps of Engineers Federal 1955 Columbia River Washington 2620 MW http://www.nws.usace.army.mil/Missions/CivilWorks/LocksandDams/ChiefJosephDam.aspx Boat Launch Area, Boat Ramp, Camping Area, Picnic Area, Tailwater Fishing Facility, Visitor Center
City of Albany: Santiam Albany Canal, OR City of Albany Municipal 2009 Santiam - Albany Canal Oregon .5 MW http://www.cityofalbany.net/
CJ Strike: Snake River, ID Idaho Power IOU 1952 Snake River Idaho 82.8 MW
Clear Lake: Snake River, ID Idaho Power IOU 1937 Snake River Idaho 2.5 MW
Clearwater 1: Clearwater River, OR PacifiCorp IOU 1953 Clearwater River Oregon 15 MW http://www.pacificorp.com/index.html
Clearwater 2: Clearwater River, OR PacifiCorp IOU 1953 Clearwater R. Oregon 26.0 MW http://www.pacificorp.com/index.html
Clearwater: N. Fk. Clearwater River, ID ID Dept. of Water Recources Independent 2000 N. Fk. Clearwater River Idaho 2.9 MW
Cline Falls: Deschutes River, OR PacifiCorp IOU 1943 Deschutes R. Oregon 1.0 MW http://www.pacificorp.com/index.html
Cochrane: Missouri River, MT PPL Montana Independent 1958 Missouri River Montana 48.0 MW Access Area, Trails
COPCO 1: Klamath River, CA PacifiCorp IOU 1918 Klamath River California 20.0 MW
COPCO 2: Klamath River, CA PacifiCorp IOU 1925 Klamath River CaliforniaIdaho 27.0 MW
Cougar: McKenzie River, OR U.S. Army Corps of Engineers Federal 1964 McKenzie R. Oregon 26.0 MW http://www.nwp.usace.army.mil/locations/cougar.asp
Cowiche Hydroelectric Project: Tieton River, WA Yakima-Tieton Irrigation Dist Independent 1987 Tieton River Washington 1.7 MW http://www.wswra.org/irrigation_district_members.html
Cowlitz Falls: Cowlitz River, WA Lewis Co. PUD PUD 1994 Cowlitz River Washington 70 MW http://www.lcpud.org/
Cushman 1: Skokomish River North Fork, WA Tacoma Power Municipal 1926 Skokomish River North Fork Washington 43.2 MW http://www.mytpu.org/ Boat Launch Area, Boat Ramp, Camping Area, Cottages, Cabins, Fishing Pier, Food Services, Marina, Organizational, Groups, Overlook, Park, Picnic Area, Playground Area, Tent, Trailer Sites, Trails, Wildlife Area
Cushman 2: Skokomish River North Fork, WA Tacoma Power Municipal 1930 Skokomish River North Fork Washington 81 MW http://www.mytpu.org/ Boat Launch Area, Boat Ramp, Camping Area, Cottages, Cabins, Food Services, Overlook, Park, Picnic Area, Playground Area, Tent, Trailer Sites, Visitor Center
Cutler: Bear River, UT PacifiCorp IOU 1924 Bear River Utah 30 MW
Deep Creek: Deep Creek, WA G. Foster Independent 1983 Deep Creek Washington .7 MW
Deer Creek: Deer Creek, UT Bureau of Reclamation Independent 1981 Deer Creek Utah 0.3 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Deer+Creek+Dam
Denny Creek: Denny Creek, OR C.A. and D.E. Curtiss Independent 1985 Denny Cr. Oregon 0.1 MW
Detroit: N. Fork Santiam River, OR U.S. Army Corps of Engineers Federal 1953 N. Fk. Santiam R. Oregon 100 MW http://www.nwp.usace.army.mil/locations/detroit.asp
Dexter: M. Fork Willamette River, OR U.S. Army Corps of Engineers Federal 1955 M. Fk. Willamette River Oregon 15.0 MW http://www.nwp.usace.army.mil/locations/dexter.asp
Diablo: Skagit River, WA Seattle City Light IOU 1936 Skagit River Washington 152.8 MW Boat Launch Area, Boat Ramp, Camping Area, Fishing Pier, Hunting Area, Interpretive Display, Overlook, Picnic Area, Swimming Area, Tent, Trailer Sites, Trails, Visitor Center, Wildlife Area
Dietrich Drop: Milner-Gooding Canal, ID BP Hydro Assoc. Independent 1990 Milner-Gooding Canal Idaho 4.8 MW
Doug Hull: Twin Falls Canal Lateral 28, ID D. Hull Independent 1983 Twin Falls Canal Lateral 28 Idaho 0.3 MW
Dry Creek: Dry Creek, ID Independent 1987 Dry Creek Idaho 3.6 Boat Launch Area, Camping Area, Hunting Area, Picnic Area, Visitor Center
Dworshak: Clearwater River, ID U.S. Army Corps of Engineers Federal 1973 Clearwater River Idaho 400.0 MW http://www.nww.usace.army.mil/html/pub/pertdata/dwapert.htm
Eagle Point: Little Butte Creek, OR PacifiCorp IOU 1957 Little Butte Creek Oregon 2.8 MW http://www.pacificorp.com/index.html
East Fork Ditch: E. Fk. Weisser River, ID BS Incorporated Independent 1994 E. Fk. Weisser River Idaho 2.5 MW
East Side: Klamath River, OR PacifiCorp IOU 1924 Klamath R. Oregon 3.2 MW http://www.pacificorp.com/index.html
Ebey Hill: Tribe to North Fork Stillaguamish, WA K and P Duncan Independent 1992 Tribe to North Fork Stillaguamish Washington 0.1 MW
Electron: Puyallup River, WA Puget Sound Energy IOU 1904 Puyallup River Washington 22.8 MW http://www.pse.com/Pages/default.aspx
Elk Creek: Elk Creek, ID ENEL Spa Independent 1986 Elk Creek Idaho 2.6 MW
Eltopia Branch Canal 4.6: Eltopia Branch Canal, WA Columbia Basin Irr. District Independent 1983 Eltopia Branch Canal Washington 2.2 MW http://www.columbiairrigation.com/
Elwha: Elwha River, WA U.S. Department of the Interior Independent 1913 Elwha Dam Washington 12.6 MW http://www.doi.gov/index.cfm
Fall Creek: Klamath River, CA PacifiCorp IOU 1903 Klamath River CaliforniaIdaho 2.1
Falls Creek: Falls Creek, OR Frontier Technology Inc. Independent 1984 Falls Creek Oregon 4.1 MW
Falls Creek: Falls Creek, WA A. H. Haley Independent 1995 Falls Creek Washington 0 MW
Falls River: Fall River, ID Marysville Hydro Partners Independent 1993 Fall River Idaho 9.1 MW
Faraday: Clackamas River, OR Portland General Electric IOU 1907 Clackamas R. Oregon 36.6 MW http://www.portlandgeneral.com/default.aspx
Farmers Irr. Dist. No. 2: Farmers Ditch, OR Famers Irr. Dist. Independent 1986 Farmers Ditch Oregon 3.0 MW
Farmers Irr. Dist. No.3: Low Line Ditch, OR Famers Irr. Dist. Independent 1987 Low Line Ditch Oregon 1.8 MW
Faulkner: N. Side Main “Y” Canal, ID Faulkner Land and Livestock Co. Independent 1987 N. Side Main "Y" Canal Idaho 0.9 MW
Ferguson Ridge: Wallowa Valley Imp. Dist. Canal, OR Joseph Hydro Assoc. Independent 1984 Wallowa Valley Imp. Dist. Canal. Oregon 1.9 MW
Fish Creek: Fish Creek, OR PacifiCorp IOU 1952 Fish Creek Oregon 11.0 MW http://www.pacificorp.com/index.html
Fisheries Development No. 1: Billingsley Circle, ID Fisheries Development Co. Independent 1990 Billingsley Circle Idaho 0.3 MW
Fontenelle: Green River, WY Bureau of Reclamation Federal 1961 Green River Wyoming 10 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Fontenelle%20Dam
Forgy: Unnames Spring, ID 1995 Unnamed Spring Idaho 0.1 MW
Fort Peck: Missouri River, MT U.S. Army Corps of Engineers Federal 1943 Missouri River Montana 185.3 MW http://www.nwo.usace.army.mil/lake_proj/fortpeck/index.html
Foster: S. Fork Santiam River, OR U.S. Army Corps of Engineers Federal 1968 S. Fk. Santiam River Oregon 20.0 MW http://www.nwp.usace.army.mil/locations/foster.asp
Fremont Canyon: North Platte River, WY Bureau of Reclamation Federal 1960 North Platte River Wyoming 67 MW http://www.usbr.gov/projects/Powerplant.jsp?fac_Name=Fremont+Canyon+Powerplant
Gem State: Snake River, ID City Of Idaho Falls Municipal 1988 Snake River Idaho 23.4 MW
Geo-Bon No. 2: Little Wood River, ID G. Arkoosh Independent 1986 Little Wood River Idaho 1.1 MW
Georgetown: Georgetown Creek, ID Georgetown Irr. Co. 1985 Georgetown Creek Idaho 0.5 MW
Glendo: North Platte River, WY Bureau of Reclamation Federal 1958 North Platte River Wyoming 38 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Glendo+Dam&groupName=Overview
Glines Canyon: Elwha River, WA U.S. Department of the Interior Independent 1927 Elwha River Washington 16.3 MW http://www.doi.gov/index.cfm Boat Launch Area, Boat Ramp, Overlook, Picnic Area
Gold Ray 1-2: Rogue River, OR Jackson County Municipal 1907 Rogue River Oregon 1.5 MW
Goodrich: Goodrich Creek, OR Independent Goodrich Creek Oregon 0.1 MW
Gorge: Skagit River, WA Seattle City Light Municipal 1924 Skagit River Washington 207.3 MW Boat Launch Area, Boat Ramp, Camping Area, Food Services, Hunting Area, Interpretive Display, Overlook, Park, Picnic Area, Playground Area, Tent, Trailer Sites, Trails, Visitor Center, Whitewater Boating, Wildlife Area
Goshen North: Idaho Falls, ID Ridgeline Energy/BP Wind Energy Independent 2010 Idaho Falls Idaho 124.5 MW
Grace: Bear River, ID PacifiCorp IOU 1914 Bear River Idaho 33.0 MW Access Area
Grand Coulee: Columbia River, WA Bureau of Reclamation Federal 1941 Columbia River Washington 6,809 MW http://www.usbr.gov/pn/grandcoulee/
Green Peter: M. Fork Santiam River, OR U.S. Army Corps of Engineers Federal 1967 Santiam River Oregon 80.0 MW http://www.nwp.usace.army.mil/locations/greenpeter.asp
Guernsey: North Platte River, WY Bureau of Reclamation Federal 1927 North Platte River Wyoming 5 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Guernsey%20Dam
Hailey: Indian Circle, ID City of Hailey Independent 1985 Indian Circle Idaho 0.1 MW
Hauser: Missouri River, MT PPL Montana Independent 1911 Missouri River Montana 17.0 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Fishing Pier, Food Services, Hunting Area, Interpretive Display, Marina, Picnic Area, Playground Area, Swimming Area, Tent, Trailer Sites, Trails, Wildlife Area, Winter Sports
Hay Canyon: Wasco, OR Iberdrola Renewables Independent 2008 Wasco Oregon 100.8 MW
Hazelton A: N. Side Main Canal, ID ENEL Spa Independent 1990 N. Side Main Canal Idaho 8.7 MW
Hazelton B: N. Side Main Canal, ID N. Side Canal Co. Independent 1993 N. Side Main Canal Idaho 7.6 MW
Heart Mountain: Shoshone River, WY Bureau of Reclamation Federal 1947 Shoshone River Wyoming 5 MW http://www.usbr.gov/projects/Powerplant.jsp?fac_Name=Heart+Mountain+Powerplant
Hell’s Canyon 1-3: Snake River, ID/OR Idaho Power IOU 1967 Snake River IdahoOregon 391.5 MW
Hills Creek: M. Fork Willamette River, OR U.S. Army Corps of Engineers Federal 1962 M. Fk. Willamette River Oregon 30.0 MW http://www.nwp.usace.army.mil/locations/hillscreek.asp
HM Jackson: Sultan River, WA Snohomish Co. PUD PUD 1984 Sultan River Washington 111.8 http://www.snopud.com/ Access Area, Boat Launch Area, Boat Ramp, Hunting Area, Wildlife Area
Holter: Missouri River, MT PPL Montana Independent 1918 Missouri River Montana 38.4 MW Boat Launch Area, Boat Ramp, Camping Area, Hunting Area, Interpretive Display, Marina, Organizational, Groups, Overlook, Picnic Area, Swimming Area, Tent, Trailer Sites, Trails, Visitor Center, Wildlife Area
Hood Street: McMillen Reservoir, WA Tacoma Power Municipal 1990 McMillan Reservoir Washington .9 MW http://www.mytpu.org/
Horseshoe: Payette River, ID Innergex Power Independent 1995 Payette River Idaho 9.4 MW
Hungry Horse: Flathead River, MT Bureau of Reclamation Federal 1952 Flathead River Montana 428.0 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Hungry+Horse+Dam
Ice Harbor: Snake River, WA U.S. Army Corps of Engineers Federal 1962 Snake River Washington 603.0 MW http://www.nww.usace.army.mil/html/pub/pertdata/ihpert.htm Boat Launch Area, Boat Ramp, Picnic Area, Swimming Area, Visitor Center
Idaho Fall Upper Plant 4: Snake River, ID City Of Idaho Falls Municipal 1982 Snake River Idaho 8.0 MW
Idaho Falls City Plant 3: Snake River, ID City Of Idaho Falls Municipal 1982 Snake River Idaho 8.0 MW
Idaho Falls: Snake River, ID Idaho Falls Power Municipal 1982 Snake River Idaho 8.0 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Canoe Portages, Fishing Pier, Park, Picnic Area, Swimming Area, Tailwater Fishing Facility, Tent, Trailer Sites, Trails, Whitewater Boating, Winter Sports
Idaho Falls: Snake River, ID City Of Idaho Falls Municipal 1940 Snake River Idaho 3.0 MW
Iron Gate: Klamath River, CA PacifiCorp IOU 1962 Klamath River CaliforniaIdaho 18.0 MW
Island Park: Henrys Fork, ID Fall River REA Coop 1994 Henrys Fork Idaho 4.8 MW
Jim Boyd: Umatilla, OR D. Logan Independent Umatilla River Oregon 1.2 MW
Jim Ford Creek: Jim Ford Creek, ID Ford Hydro Partnership Independent 1988 Jim Ford Creek Idaho 1.5 MW
John Boyle: Klamath River, OR PacifiCorp IOU 1958 Klamath River Oregon 98.7 MW
John Day: Columbia River, OR/WA U.S. Army Corps of Engineers Federal 1968 Columbia River OregonWashington 2200 MW http://www.nwp.usace.army.mil/locations/johnday.asp Boat Launch Area, Boat Ramp, Camping Area, Picnic Area, Tailwater Fishing Facility, Visitor Center
John Day: John Day Creek, ID Independent 1987 John Day Creek Idaho 1.1 MW
Juniper Ridge Piping and Hydro: Pilot Butte Canal, OR Central Oregon Irrigation District Independent 2010 Pilot Butte Canal Oregon 3.3 MW
Kasel-Witherspoon: Snake River, ID K-W Co. Independent 1983 Snake River Idaho 1.4 MW
Kaster Riverview: Box Canyon Spring, ID R. Kaster Independent 1983 Box Canyon Spring Idaho 0.4 MW
Kerr: Flathead River, MT PPL Montana Independent 1938 Flathead River Montana 211.5 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Cottages, Cabins, Fishing Pier, Food Services, Golf Course, Hunting Area, Interpretive Display, Marina, Organizational, Groups, Overlook, Park, Picnic Area, Playground Area, Swimming Area, Tent, Trailer Sites, Whitewater Boating, Wildlife Area
Keswick: Sacramento River, CA Bureau of Reclamation Federal 1950 Sacramento River California 75 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Keswick%20Dam
Koma Kulshan: Rocky Creek, WA Koma Kulshan Assoc. Independent 1990 Rocky Creek Washington 12 MW http://www.energyjustice.net/map/displayfacility-68097.htm
Kortes: North Platte River, WY Bureau of Reclamation Federal 1951 North Platte River Wyoming 36 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Kortes%20Dam
Koyle Ranch: Big Wood River, ID J.H. Koyle Independent 1983 Big Wood River Idaho 1.3 MW
Lacomb: Lacomb Irr. Canal, OR Lacomb Irr. Dist. Independent 1986 Lacomb Irr. Canal Oregon 1.0 MW
LaGrande: Nisqually River, WA Tacoma Power Municipal 1912 Nisqually River Washington 65.0 MW http://www.mytpu.org/
Lake Chelan: Chelan River, WA Chelan Co. PUD PUD 1927 Chelan River Washington 48 MW http://www.chelanpud.org/ Access Area, Boat Launch Area, Boat Ramp, Camping Area, Cottages, Cabins, Fishing Pier, Food Services, Hunting Area, Marina, Overlook, Park, Picnic Area, Playground Area, Swimming Area, Tailwater Fishing Facility, Tent, Trailer Sites, Trails, Visitor Center, Winter Sports
Lake Creek A: Lake Creek, MT Northern Lights Coop Coop 1917 Lake Creek IdahoMontana 1.0 MW
Lake Creek B: Lake Creek, MT Northern Lights Coop Coop 1949 Lake Creek Montana 3.5 MW
Lake Creek No.1: Lake Creek, OR Mountain Energy Co. Independent 1984 Lake Creek Oregon o.1 MW
Lake Oswego: Oswego Creek, OR Lake Oswego Corp. Independent 1910 Oswego Creek Oregon 0.5 MW
Last Chance Canal: Bear River, ID Last Chance Canal Co. Independent 1984 Bear River Idaho 1.7
Lateral No. 10: Lateral No. 10 Canal Cogeneration Inc. Independent 1984 Lataeral No. 10 Canal Idaho 2.9 MW
Leaburg-Walterville: McKenzie River, OR Eugene Water and Electric Board Municipal 1930 McKenzie River Oregon Leaburg 16.7 MW, Walterville 8 MW http://www.eweb.org/ Boat Launch Area, Boat Ramp, Park, Trails
Lemolo 2: N. Umpqua River, OR PacifiCorp IOU 1956 Umpqua River Oregon 33.0 MW
Lemolo: N. Umpqua River, OR PacifiCorp IOU 1955 N. Umpqua Oregon 32.2 MW
Lemoyne: Conyers Ditch, ID J.R. Lemoyne Independent 1985 Conyers Ditch Idaho 0.1 MW
Libby: Kootenai River, MT U.S. Army Corps of Engineers Federal 1975 Kootenai River Montana 600 MW http://www.nws.usace.army.mil/PublicMenu/Menu.cfm?sitename=libby&pagename=libbymain Boat Launch Area, Boat Ramp, Camping Area, Food Services, Marina, Overlook, Picnic Area, Tailwater Fishing Facility, Tent, Trailer Sites, Visitor Center
Lilliwaup Falls: Lilliwaup Creek, WA William G. Reed Jr Independent 1986 Lilliwaup Creek Washington 1.4 MW
Linden Ranch: Goldendale Vicinity, WA S. CA Public Power Authority JOA 2010 Goldendale Vicinity Washington 50 MW http://www.scppa.org/
Little Falls: Spokane River, WA Avista Corporation IOU 1910 Spokane River Washington 32.0 MW http://www.avistacorp.com
Little Gold: Little Gold Creek, MT Boulder Hydro Independent 1983 Little Gold Creek Montana 0.4 MW
Little Goose: Snake River, WA U.S. Army Corps of Engineers Federal 1970 Snake River Washington 810 MW http://www.nww.usace.army.mil/Locations/District-Locks-and-Dams/Little-Goose-Lock-and-Dam/ Picnic Area, Swimming Area, Visitor Center
Little Mac: Cedar Draw, ID T and R McCauley Independent 1988 Cedar Draw Idaho 1.5 MW
Little Wood Reservoir: Little Wood River, ID W. Arkoosh Independent 1988 Little Wood River Idaho 1.0 MW
Little Wood River Ranch: Little Wood River, ID Little Wood River Irr. Dist. Independent 1985 Little Wood River Idaho 2.8 MW
LM Angus Ranch: Warm Springs Creek, ID Independent Warm Springs Creek Idaho 0.9 MW
Long Lake: Spokane River, WA Avista Corporation IOU 1915 Spokane River Washington 70.0 MW http://www.avistacorp.com Access Area, Boat Launch Area, Boat Ramp, Camping Area, Hunting Area, Marina, Overlook, Park, Picnic Area, Playground Area, Swimming Area, Tent, Trailer Sites, Wildlife Area
Lookout Point: M. Fk. Willamette River, OR U.S. Army Corps of Engineers Federal 1955 M. Fk. Willamette River Oregon 120.0 MW http://www.nwp.usace.army.mil/locations/lookoutpoint.asp
Lost Creek: Rogue River, OR U.S. Army Corps of Engineers Federal 1977 Rogue River Oregon 49.2 MW http://www.nwp.usace.army.mil/locations/lostcreek.asp
Low Line 1: Low Line Canal, ID Twin Falls Canal Co. Independent 1984 Low Line Canal Idaho 8.0 MW
Low Line 2: Low Line Canal, ID Twin Falls Canal Co. 1988 Low Line Canal Idaho 2.8 MW
Low Line 3: Low Line Canal, ID Twin Falls Canal Co. Independent 2007 Low Line Canal Idaho 2.3 MW
Lower Baker: Baker River, WA Puget Sound Energy IOU 1925 Baker River Washington 12.6 MW
Lower Granite: Snake River, WA U.S. Army Corps of Engineers Federal 1975 Snake River Washington 810 MW http://www.nww.usace.army.mil/html/pub/pertdata/granpd.htm Picnic Area, Swimming Area, Visitor Center
Lower Malad: Big Wood River, ID Idaho Power 1911 Big Wood River Idaho 13.5 MW Access Area, Picnic Area, Whitewater Boating
Lower Monumental: Snake River, WA U.S. Army Corps of Engineers Federal 1969 Snake River Washington 810 MW http://www.nww.usace.army.mil/html/pub/pertdata/lomopert.htm Boat Launch Area, Boat Ramp, Picnic Area, Swimming Area, Visitor Center
Lower Salmon: Snake River, ID Idaho Power Independent 1910 Snake river Idaho 60.0 MW Access Area, Boat Launch Area, Boat Ramp, Park, Picnic Area, Whitewater Boating
Lower Turnbull Drop: Spring Valley Canal, MT Turnbull Hydro Independent 2011 Spring Valley Canal Montana 7.7 MW
LQ-LS Drains: LS Drain & LQ Drain, ID Pigeon Cove Power Co. Independent 1984 LS Drain LQ Drain Idaho 1.8 MW
Lucky Peak: Boise River, ID Boise Proj. Board of Control Independent 1988 Boise River Idaho 101.2 MW
Madison: Madison River, MT PPL Montana Independent 1906 Madison River Montana 8.8 MW Boat Launch Area, Camping Area, Cottages, Cabins, Hunting Area, Marina, Picnic Area, Swimming Area, Tent, Trailer Sites, Trails, Whitewater Boating, Wildlife Area, Winter Sports
Magic Dam: Big Wood River, ID Magic Reservoir Hydro Inc. Independent 1989 Big Wood River Idaho 9.0 MW
Main Canal Headworks: Main Canal, WA Columbia Basin Irr. District Independent 1986 Main Canal Washington 26 http://www.columbiairrigation.com/
Marion Investment: N. Santiam River, OR Independent N. Santiam River Oregon 0.9 MW
Marsh Valley: Portneuf Marsh Valley Canal, ID Marsh Valley Hydroelectric Independent 1993 Portneuf Marsh Valley Canal Idaho 1.6 MW
Mayfield: Cowlitz River, WA Tacoma Power Municipal 1963 Cowlitz River Washington 162 MW http://www.mytpu.org/ Boat Launch Area, Boat Ramp, Camping Area, Fishing Pier, Food Services, Interpretive Display, Organizational, Groups, Overlook, Park, Picnic Area, Playground Area, Swimming Area, Visitor Center
McKenzie: McKenzie River, OR John H. Bigalow Independent 1957 McKenzie River Oregon 4.0 MW
McNary: Columbia River, OR/WA U.S. Army Corps of Engineers Federal 1953 Columbia River OregonWashington 990.5 MW http://www.nww.usace.army.mil/html/OFFICES/PA/FactSheets/MCN_2008dpi72.pdf Boat Launch Area, Boat Ramp, Picnic Area, Tailwater Fishing Facility, Visitor Center
Merwin: Lewis River, WA PacifiCorp IOU 1932 Lewis River Washington 136 MW http://www.pacificorp.com/index.html Boat Launch Area, Boat Ramp, Park, Picnic Area, Playground Area, Swimming Area, Trails
Meyers Falls: Colville River, WA Hydro Technology Systems Independent 1915 Colville River Washington 1.2 MW http://home.earthlink.net/~hydrotech/
Middle Fork Irrigation District 1: W. Evans Creek, OR Middle Fork Irr. Dist. Independent 1987 W. Evans Creek CaliforniaOregon 0.6 MW
Middle Fork Irrigation District 2: Irr. Conduit, OR Middle Fork Irr. Dist. Independent 1987 Irr. Conduit Oregon 0.6 MW
Middle Fork Irrigation District 3: Clear Branch, OR Middle Fork Irr. Dist. Independent 1987 Clear Branch Oregon 2.1 MW
Mile 28: Milner-Gooding Canal, ID Independent 1994 Milner-Gooding Canal Idaho 1.4 MW
Mill Creek (Cove): Mill Creek, OR City of Cove Independent 1984 Mill Creek Oregon 1.0 MW
Mill Creek: Mill Creek, WA L.S. Walker Independent 1983 Mill Creek Washington .6 MW
Milner: N. Side Main Canal, ID Milner Dam Inc. Independent 1905 N. Side Main Canal Idaho 0.8 MW
Milner: Twin Falls Main Canal, ID Idaho Power Independent 1992 Twin Falls Main Canal Idaho 58.7 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Hunting Area, Interpretive Display, Park, Picnic Area, Tailwater Fishing Facility, Tent, Trailer Sites, Trails, Visitor Center, Whitewater Boating, Wildlife Area
Miltown 1-5: Clark Fork River, MT North Western Energy IOU 1908 Clark Fork River IdahoMontana 3.0 MW
Minidoka: Snake River, ID Bureau of Reclamation Federal 1927 Snake River Idaho 27.6 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Minidoka+Dam
Minikahda: Minikahda Creek, OR P.M. Sanders Independent Minikahda Creek Oregon 0.1 MW
Mink Creek: Mink Creek, ID R. Fackrell Independent 1986 Mink Creek Idaho 3.1 MW
Mirror Lake: Nooksack River, WA Hutchinson Hydro Independent 1983 Nooksack River, M. Fk. Washington 1 MW http://canyonhydro.com/
Mitchell Butte: Mitchell Butte Lateral, OR Owyhee Project Irr. Dist. Independent 1989 Mitchell Butte Lateral Oregon 1.9 MW
Monroe Street: Spokane River, WA Avista Corporation IOU 1890 Spokane River Washington 14.82 MW http://www.avistacorp.com Access Area, Interpretive Display, Overlook, Park, Picnic Area
Mora Canal Drop: Mora Canal, ID Boise Proj. Board of Control Independent 2006 Mora Canal Idaho 1.7 MW
Morony: Missouri River, MT PPL Montana Independent 1930 Missouri River Montana 45.0 MW Access Area, Boat Launch Area, Boat Ramp, Tailwater Fishing Facility, Trails, Whitewater Boating, Wildlife Area
Morse Creek: Morse Creek, WA City of Port AngelesHutchinson Hydro Municipal 1987 Morse Creek Washington .5 MW http://www.cityofpa.us/
Mossyrock: Cowlitz River, WA Tacoma Power Municipal 1968 Cowlitz River Washington 300.0 MW http://www.mytpu.org/tacomapower/Default.htm Boat Launch Area, Boat Ramp, Camping Area, Fishing Pier, Food Services, Interpretive Display, Organizational, Groups, Overlook, Park, Picnic Area, Playground Area, Swimming Area, Visitor Center
Moyie River Lower: Mora Canal, ID City of Bonners Ferry Municipal 1942 Moyie River Idaho 2.0 MW
Moyie River Third: Moyie River, ID City of Bonners Ferry Municipal 1982 Moyie River Idaho 1.5 MW
Moyie River Upper: Moyie River, ID City of Bonners Ferry Municipal 1921 Moyie River Idaho 0.5 MW
Mt Tabor: Mt. Tabor Res. No. 5, OR Independent Oregon 0.2 MW
Mud Creek A: Mud Creek, ID S and S Limited Partnership Independent 1982 Mud Creek Idaho 0.4 MW
Mud Creek B: Present Ditch, ID S and S Limited Partnership Independent 1982 Present Ditch Idaho 0.2 MW
Mystic Lake: W. Rosebud Creek, MT PPL Montana Independent 1925 W. Rosebud Creek Montana 12.4 MW Access Area, Camping Area, Hunting Area, Interpretive Display, Picnic Area, Tent, Trailer Sites, Trails, Wildlife Area, Winter Sports
N-32: N. 32 Lateral Canal, ID Marcos Ranches Independent 1985 N. 32 Lateral Canal Idaho 0.6 MW
New Felt: Teton River, ID Fall River REA Coop 1986 Teton River Idaho 1.3 MW
Newhalem Creek: Newalem Creek, WA Seattle City Light Municipal 1921 Newhalem Creek Washington 2.1 http://www.seattle.gov/
Nicholson: Uncle Ike Creek, ID O. Nicholson Independent 1986 Uncle Ike Creek Idaho 0.5 MW
Nicohls Gap: Nicohls Branch Tribe, OR GB and PP Ryan Independent 1986 Nicohls Branch Tribe Oregon 0.9 MW
Nine Mile: Spokane River, WA Avista Corporation IOU 1908 Spokane River Washington 12.0 MW http://www.avistacorp.com Access Area, Camping Area, Interpretive Display, Park, Picnic Area, Tent, Trailer Sites, Trails, Whitewater Boating
Nooksack: Nooksack River, WA Arch Ford IOU 1906 N. Fk. Nooksack River Washington 1.5 MW http://www.pse.com/Pages/default.aspx
North Fork Sprague River: Sprague River N. Fork, OR HDI Assoc. and VFD Ehlers Independent 1989 Sprague River N. Fork Oregon 1.2 MW
North Fork: Clackamas River, OR Portland General Electric IOU 1958 Clackamas River Oregon 40.8 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Fishing Pier, Food Services, Marina, Park, Picnic Area, Tent, Trailer Sites
North Willow Creek: N. Willow Creek, MT G and G Ohs Independent 1988 N. Willow Creek Montana 0.4 MW
Noxon Rapids: Clark Fork River, MT Avista Corporation IOU 1959 Clark Fork River Montana 480.6 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Fishing Pier, Golf Course, Hunting Area, Overlook, Park, Picnic Area, Swimming Area, Tent, Trailer Sites, Whitewater Boating, Winter Sports
O.J. Power Company: Mill Creek, ID O.J. Power Co. Independent 1986 Mill Creek Idaho 0.2 MW
Oak Grove: Clackamas River Oak Grove Fork, OR Portland General Electric IOU 1924 Clackamas River Oak Grove Fork Oregon 51.0 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Fishing Pier, Organizational, Groups, Picnic Area, Tent, Trailer Sites
Odell Creek: Odell Creek, OR F.L. Plog Independent 1984 Odell Creek Oregon 0.2 MW
Oneida: Bear River, ID PacifiCorp IOU 1915 Bear River Idaho 30.0 MW Boat Launch Area, Boat Ramp, Camping Area, Picnic Area, Tent, Trailer Sites
Opal Springs: Crooked River, OR Deschutes Valley Wtr. Dist. Independent 1920 Crooked River Oregon 4.3 MW
Orchard Avenue: Tieton River, WA Yakima-Tieton Irrigation Dist Independent 1987 Tieton River Washington 1.6 MW http://www.wswra.org/irrigation_district_members.html
Oregon City: Willamette River, OR Portland General Electric IOU 1916 Willamette River Oregon 1.5 MW
Owyhee Dam: Owyhee River, OR Owyhee Project Irr. Dist. Independent 1985 Owyhee River Oregon 4.3 MW
Owyhee Tunnel No. 1: Owyhee Lake, OR Owyhee Project Irr. Dist. Independent 1993 Owyhee Lake Oregon 7.0 MW
Oxbow: Snake River, ID/OR Idaho Power IOU 1961 Snake River Idaho 190.0 MW
Packwood Lake: Lake Creek, WA Energy Northwest JOA 1964 Lake Creek Washington 27.5 MW Camping Area, Trails
Palisades: Snake River, ID Bureau of Reclamation Federal 1957 Snake River Idaho 176.4 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Palisades+Dam
Paris: Weilenmann Canal, ID PacifiCorp IOU 1910 Weilenmann Canal Idaho 0.7 MW
Pelton Regulation Dam: Deschutes River, OR Warm Spring Tribal Council Independent 1957 Deschutes River Oregon 18.9 MW Access Area, Boat Launch Area, Boat Ramp, Marina, Picnic Area, Tailwater Fishing Facility, Visitor Center
Pelton: Deschutes River, OR Portland General ElectricWarm Springs Power Enterprises IOU/Independent 1957 Deschutes River Oregon 109.8 MW
Philipsburg A: Fred Burr Creek, MT Edelman Enterprises Inc. Independent 1981 Fred Burr Creek Montana 0.1 MW
Philipsburg B: Fred Burr Creek, MT Edelman Enterprises Inc. Independent 1981 Fred Burr Creek Montana 0.1 MW
Pine Creek: Pine Creek, MT H. M. Carter Independent 1975 Pine Creek Montana 0.4 MW
Port Townsend: Big Quilcene River, WA Port Townsend Paper Corp. Independent 1982 Big Quilcene River Washington .4 MW http://www.ptpc.com/
Portneuf River: Portneuf River, ID Commercial Energy Management Independent 1993 Portneuf River Idaho 0.9 MW
Post Falls: Spokane River, ID Avista Corporation IOU 1906 Spokane River Idaho 14.8 MW Access Area, Boat Launch Area, Boat Ramp, Camping Area, Cottages, Cabins, Food Services, Golf Course, Interpretive Display, Marina, Organizational, Groups, Overlook, Park, Picnic Area, Playground Area, Tent, Trailer Sites, Trails, Wildlife Area
Potholes East Canal 66.0: Potholes Canal, WA Columbia Basin Irr. District Independent 1985 Potholes E. Canal Washington 2.4 MW http://www.columbiairrigation.com/
Potholes East Canal Headworks: Potholes Canal, WA Columbia Basin Irr. District Independent 1990 Potholes E. Canal Washington 6.6 MW http://www.columbiairrigation.com/
Preston: Berquist Spring, ID Independent 1987 Berquist Spring Idaho 0.4 MW
Priest Rapids: Columbia River, WA Grant County PUD PUD 1959 Columbia River Washington 955.6 MW http://www.gcpud.org/ Access Area, Boat Launch Area, Boat Ramp, Camping Area, Food Services, Golf Course, Hunting Area, Marina, Park, Picnic Area, Playground Area, Swimming Area, Tailwater Fishing Facility, Tent, Trailer Sites, Wildlife Area
Pristine Spring: Well, ID Independent 2005 Well Idaho 0.1 MW
Prospect 1: Rogue River, OR PacifiCorp IOU 1912 Rogue River Oregon 3.8 MW Picnic Area
Prospect 2: Rogue River, OR PacifiCorp IOU 1920 Rogue River Oregon 32.0
Prospect 3: Rogue River, OR PacifiCorp IOU 1932 Rogue River, South Fork Oregon 7.2 MW
Prospect 4: Rogue River (Off-Stream), OR PacifiCorp IOU 1944 Rogue River (Off-Stream) Oregon 1.0 MW
Quincy Chute: West Canal, WA Grand Coulee Project Hydroelectric Authority Independent 1985 West Canal Washington 7.8 MW
Rainbow Redevelopment: Missouri River, MT PPL Montana Independent 2011 Missouri River Montana 23.5 MW Access Area, Golf Course, Hunting Area, Interpretive Display, Overlook, Park, Picnic Area, Playground Area, Trails, Visitor Center
Rainbow: Missouri River, MT PPL Montana Independent 1910 Missouri River Montana 35.6 MW
Reeder Gulch: Ashland Creek, OR City of Ashland Municipal 1985 Ashland Creek Oregon .08 MW
Reynolds Irrigation District: Reynolds ID Main Canal, ID Reynolds Irr. Dist. Independent 1985 Reynolds ID Main Canal Idaho 0.4 MW
Rim View: Niagara Springs, ID Rim View Trout Co. Independent 2000 Niagara Springs Idaho 0.3 MW
River Mill: Clackamas River, OR Portland General Electric IOU 1911 Clackamas River Oregon 19.1 MW
Rock Creek 1-2: Rock Creek, OR Oregon Trail REA Coop 1905 Rock Creek Oregon 0.8 MW
Rock Creek: Rock Creek, ID Cogeneration Inc. Independent 1983 Rock Creek Idaho 2.5 MW
Rock Creek: Rock Creek, ID Bonneville Pacific Hydro Independent 1988 Rock Creek Idaho 1.9 MW
Rock Island: Columbia River, WA Chelan Co. PUD PUD 1931 Columbia River Washington 623.7 MW http://www.chelanpud.org/ Access Area, Boat Launch Area, Boat Ramp, Camping Area, Food Services, Golf Course, Interpretive Display, Overlook, Park, Picnic Area, Playground Area, Swimming Area, Trails, Wildlife Area, Winter Sports
Rocky Reach: Columbia River, WA Chelan Co. PUD PUD 1956 Columbia River Washington 1299.6 MW http://www.chelanpud.org/ Access Area, Boat Launch Area, Boat Ramp, Camping Area, Food Services, Interpretive Display, Organizational, Groups, Park, Picnic Area, Playground Area, Swimming Area, Tent, Trailer Sites, Trails, Visitor Center, Wildlife Area
Ross Creek: Ross Creek, MT Ross Creek Hydro Independent 1996 Ross Creek Montana 0.5 MW
Ross: Skagit River, WA Seattle City Light Municipal 1952 Skagit River Washington 338.6 MW http://www.seattle.gov/ Camping Area, Hunting Area, Overlook, Swimming Area, Trails, Wildlife Area
Round Butte: Deschutes River, OR Portland General ElectricWarm Springs Power Enterprises IOU/Independent 1964 Deschutes River Oregon 300.0 MW
Roza: Yakima River, WA Bureau of Reclamation Federal 1956 Yakima River Washington 11.3 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Roza+Diversion+Dam
Russell D. Smith: Potholes Canal, WA S. Columbia Basin Irr. District Independent 1982 Potholes E. Canal Washington 6.1 MW
Ryan: Missouri River: MT PPL Montana Independent 1915 Missouri River Montana 48.0 Interpretive Display, Overlook, Picnic Area, Trails
S. Gooding Main Canal, ID Mutual Energy Co. Independent 1984 S. Gooding Main Canal Idaho 0.3 MW
Sahko: Kastelu Drain, ID JM Miller Enterprises Independent 2006 Kastelu Drain Idaho 0.5 MW
Salt River: Salt River, WY Scott D. Heiner Independent 1964 Salt River IdahoWyoming 1.1 MW
Schaffner: Sandy Creek W. Fork, ID DBA Schaffner Power Co. Independent 1986 Sandy Creek W. Fork Idaho 0.5 MW
Seminoe: North Platte River, WY Bureau of Reclamation Federal 1939 North Platte River Wyoming 51 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Seminoe+Dam&groupName=General
Shasta: Sacramento River, CA Bureau of Reclamation Federal 1984 Sacramento River CaliforniaIdaho 422 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Shasta+Dam
Shingle Creek: Shingle Creek S. Fork, ID W. D. Deveny Independent 1984 Shingle Creek S. Fork Idaho 0.2 MW
Shoshone (Buffalo Bill Dam): Shoshone River, WY Bureau of Reclamation Federal 1910 Shoshone River Wyoming 3 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Buffalo+Bill+Dam
Shoshone Falls: Snake River, ID Idaho Power Federal 1907 Snake River Idaho 12.5 MW
Shoshone/Shoshone ll: Little Wood River, ID Shorock Hydro Inc. Independent 1982 Little Wood River Idaho 0.9 MW
Skookumchuck: Skookumchuck River, WA PacifiCorp IOU 1990 Skookumchuck River Washington 1 MW http://www.pacificorp.com/index.html
Slate Creek: Slate Creek, CA Slate Creek Hydro Associates Independent 1984 Slate Creek CaliforniaIdaho 4.2 MW
Slaughterhouse Gulch: Slaughterhouse Gulch, ID Heed Co. Independent 1983 Slaughterhouse Gulch Idaho 0.1 MW
Slide Creek: N. Umpqua River, OR PacifiCorp IOU 1951 N. Umpqua River Oregon 18.0 MW
Smith Creek, Smith Creek, ID Smith Creek Hydro LLC Municipal 1989 Smith Creek, tributary to Kootenai River Idaho 38 MW
Smith Creek: Smith Creek, WA R.B. Shipp Independent Smith Creek Washington .1 MW
Snake River Pottery: Snake River Tribe, ID A. Bowler Independent 1984 Snake River Tribe Idaho 0.1 MW
Snedigar Ranch: Coulee Creek, ID Snedigar Ranch Independent 1985 Coulee Creek Idaho 0.2 MW
Snoqualmie Falls 1: Snoqualmie River, WA Puget Sound Energy IOU 1898 Snoqualmie River Washington 42 MW http://www.pse.com/Pages/default.aspx Access Area, Interpretive Display, Overlook, Park, Picnic Area, Trails, Visitor Center, Whitewater Boating
Snoqualmie Falls 2: Snoqualmie River, WA Puget Sound Energy IOU 1910 Snoqualmie River Washington 32.5 MW http://www.pse.com/Pages/default.aspx
Soda Creek 4: Soda Creek, ID City of Soda Springs Municipal 1954 Soda Creek Idaho 0.5 MW
Soda Creek 5: Soda Creek, ID City of Soda Springs Municipal 1989 Soda Creek Idaho 0.4 MW
Soda Springs Dam: N. Umpqua River, OR PacifiCorp Independent 1952 N. Umpqua River Oregon 11.0 MW
Soda: Bear River, ID PacifiCorp IOU 1924 Bear River Idaho 14.0 MW Access Area, Boat Launch Area, Boat Ramp, Park
South Dry Creek: Rock Creek, Clear Creek Ditch, MT Hydrodynamics Inc. Independent 1985 Rock Creek, Clear Creek Ditch Montana 2.0 MW
South Fork Tolt: Tolt River, WA Seattle City Light Municipal 1995 S. Fk. Tolt River Washington 16.8 MW http://www.seattle.gov/
South Willow Creek B: South Willow Creek, MT Potosi Generating Station Independent 1980 South Willow Creek Montana 0.3 MW
Spring Creek: Spring Creek, Sacramento River, CA Bureau of Reclamation Federal 1963 Spring Creek, Sacramento River California 150 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Spring+Creek+Debris+Dam&groupName=Overview
St. Anothany: Henry’s Fork, ID PacifiCorp IOU 1915 Henry's Fork Idaho 0.5 MW
Stayton: Santiam Wtr. Cntrl. Dist. Canal, OR Santiam Water Control District Independent 1937 Santiam Wtr. Cntrl. Dist. Canal Oregon 0.6 MW
Stevenson No. 1: Snake River Tribe, ID L.E. Stevenson Independent 1979 Snake River Tribe Idaho 0.1 MW
Stevenson No. 2: Snake River Tribe, ID L.E. Stevenson Independent 1980 Snake River Tribe Idaho 0.1 MW
Stone Creek: Oak Grove Fork Clackamas River, OR Eugene Water and Electric Board Municipal 1994 Clackamas R., Oak Grove Fork Oregon 12.0 MW http://www.eweb.org/
Strawberry Creek 1-3: Strawberry Creek, WY Lower Valley Energy Coop 1951 Strawberry Creek Wyoming 1.5 MW
Strawberry Creek: Strawberry Creek, MT C and I Allen Independent 1987 Strawberry Creek IdahoMontana 0.3
Sullivan: Clackamas R., Oak Grove Fork, OR Portland General Electric IOU 1895 Clackamas R., Oak Grove Fork Oregon 15.4 MW Access Area, Boat Launch Area, Boat Ramp, Park, Picnic Area
Summer Falls: Main Canal, WA Columbia Basin Irr. District Independent 1984 Main Canal Washington 92 MW http://www.columbiairrigation.com/
Sunshine: Lake Creek, ID A.W. Brown Independent 1987 Lake Creek Idaho 0.1 MW
Swan Falls: Snake River, ID Idaho Power IOU 1901 Snake River Idaho 25.0 Access Area, Boat Launch Area, Boat Ramp, Canoe Portages, Park, Picnic Area, Whitewater Boating
Swift 1: Lewis River, WA PacifiCorp IOU 1958 Lewis River Washington 240 MW http://www.pacificorp.com/index.html Boat Launch Area, Boat Ramp, Camping Area, Picnic Area, Tent, Trailer Sites
Swift 2: Lewis River, WA Cowlitz PUD PUD 1958 Lewis River Washington 70 MW http://www.cowlitzpud.org/
Swift Creek: Swift Creek, WY Lower Valley Energy Coop 1942 Swift Creek Wyoming 1.5 MW
Sygitowicz Creek: Sygitowicz Creek, WA D.S. Marr Independent 1986 Sygitowicz Creek Washington .5 MW
Telford: Bell Mountain Creek, ID Pancheri Inc. Independent 1984 Bell Mountain Creek Idaho 0.2 MW
The Dalles North Fishway: Columbia River, WA Northern Wasco Co. PUD PUD 1991 Columbia River Washington 4.9 MW http://www.nwasco.com/
The Dalles: Columbia River, OR/WA U.S. Army Corps of Engineers Federal 1957 Columbia River OregonWashington 1807 MW http://www.nwp.usace.army.mil/locations/thedalles.asp Boat Launch Area, Boat Ramp, Picnic Area, Tailwater Fishing Facility, Visitor Center
Thompson Falls: Clark Fork River, MT PPL Montana Independent 1915 Clark Fork River Montana 87.5 Access Area, Boat Launch Area, Boat Ramp, Cottages, Cabins, Food Services, Golf Course, Hunting Area, Interpretive Display, Overlook, Park, Picnic Area, Swimming Area, Tailwater Fishing Facility, Wildlife Area
Thompson’s Mills: Calipooia River, OR Boston Power Co. Inc. Independent 1986 Calipooia River Oregon 0.1 MW
Thousand Springs: Snake River, ID Idaho Power IOU 1912 Snake River Idaho 8.8 MW
Tiber-Montana: Marias River, MT Dry Creek LLC Independent 2004 MW Marias River Montana 7.5 MW
Tieton: Yakima River, WA American Energy Independent 2006 Yakima River (Rimrock Dam) Washington 13.6 MW http://www.americanenergy.com/
Toketee Falls: N. Umpqua River, OR PacifiCorp IOU 1963 N. Umpqua River Oregon 42.6
Trinity: Phelps Creek, WA Trinity Conservancy Inc Independent 1923 Phelps Creek Washington 0.2 MW
Trinity: Trinity River, CA Bureau of Reclamation Federal 1962 Trinity River California 106 MW http://www.usbr.gov/projects/Project.jsp?proj_Name=Shasta/Trinity River Division Project
Tuttle Ranch: Big Wood River, ID V. F. Ravenscroft Independent 1983 Big Wood River Idaho 1.1 MW
Twin Falls: Snake River, ID Idaho Power IOU 1935 Snake River Idaho 52.7 MW Access Area, Boat Launch Area, Boat Ramp, Park, Picnic Area
Twin Falls: Snoqualmie River S. Fork, WA Twin Falls Hydro Associates Independent 1989 Snoqualamie River, S. Fk. Washington 20 MW
Twin Reservoirs: Mill Creek, WA City of Walla Walla IndependentMunicipal 1988 Mill Creek Washington 2.2 MW http://www.ci.walla-walla.wa.us/
Upper Baker: Baker River, WA Puget Sound Energy IOU 1959 Baker River Washington 104.8 MW
Upper Falls: Spokane River, WA Avista Corporation IOU 1922 Spokane River Washington 10.0 MW http://www.avistacorp.com Access Area, Cottages, Cabins, Food Services, Interpretive Display, Overlook, Park, Trails
Upper Little Sheep Creek: Wallowa Valley Imp. Dist. Canal, OR Joseph Hydro Assoc. Independent 1984 Wallowa Valley Imp. Dist. Canal IdahoOregon 4.3 MW
Upper Malad: Big Wood River, ID Idaho Power IOU 1948 Big Wood River Idaho 8.3 MW Access Area, Picnic Area, Whitewater Boating
Upper Salmon 3 & 4: Snake River, ID Idaho Power IOU 1947 Snake River Idaho 16.5 Access Area, Boat Launch Area, Boat Ramp, Park, Picnic Area
Upper Salmon: Snake River, ID Idaho Power IOU 1937 Snake River Idaho 18.0 MW
Upper Turnbull Drop: Spring Valley Canal, MT Turnbull Hydro Independent 2011 Spring Valley Canal Montana 5.3 MW
Upriver: Spokane River, WA City of Spokane Municipal 1894 Spokane River Washington 17.6 http://www.spokanecity.org/
Wallowa Falls: Wallowa Creek E. Fork, OR IOU 1921 Wallowa Creek E. Fork IdahoOregon 1.1 MW
Wanapum: Columbia River, WA Grant County PUD PUD 1963 Columbia River Washington 1038 MW http://www.gcpud.org/ Access Area, Boat Launch Area, Boat Ramp, Camping Area, Food Services, Golf Course, Hunting Area, Interpretive Display, Marina, Overlook, Park, Picnic Area, Playground Area, Swimming Area, Tailwater Fishing Facility, Trails, Visitor Center, Wildlife Area
Wapato Drop 2: Wapato Main Canal, WA Yakama Nation Tribal 1942 Wapato Main Canal, Yakima River Washington 2.5 MW http://www.yakamamuseum.com/
Wapato Drop 3: Wapoto Main Canal, WA Yakama Nation Tribal 1932 Wapato Main Canal, Yakima River Washington 1.6 MW http://www.yakamamuseum.com/
Warm Springs 1: Warm Spring Creek, ID W. and V. Ingram Independent 1986 Warm Springs Creek Idaho 1.1 MW
Warm Springs 2: Warm Springs Creek, ID W. and V. Ingram Independent 1986 Warm Springs Creek Idaho 0.5 MW
Water Street: Stayton Power Canal, OR Santiam Water Control District Independent 1985 Stayton Power Canal IdahoOregon 0.2 MW
Weeks Falls: Snoqualmie River, WA South Fork ll Associates Independent 1990 Snoqualamie River, S. Fk. Washington 4.3 MW
Wells: Columbia River, WA Douglas Co. PUD PUD 1967 Columbia River Washington 774.3 MW http://www.douglaspud.org/ Access Area, Boat Launch Area, Boat Ramp, Camping Area, Fishing Pier, Golf Course, Hunting Area, Interpretive Display, Marina, Overlook, Park, Picnic Area, Swimming Area, Tent, Trailer Sites, Trails, Visitor Center, Whitewater Boating, Wildlife Area
West Linn: Willamette River: OR Portland General Electric Independent Willamette River IdahoOregon 3.6 MW
West Side: Klamath River, OR PacifiCorp IOU 1908 Klamath River IdahoOregon 0.6 MW
White Ranch: Mud Creek, ID T. G. White Independent 1986 Mud Creek Idaho 0.3 MW
White Water Ranch: Stoddard Creek, ID White Water Ranch Independent 1985 Stoddard Creek Idaho 0.1 MW
Whitefish: Haskill Creek, MT City Of Whitefish Municipal 1985 Haskill Creek Montana 0.2 MW
Wilson Lake: N. Side Main Canal, ID Hazelton/Wilson Joint Venture Independent 1993 N. Side Main Canal Idaho 8.4 MW
Wisconsin-Noble: Noble Fork, MT Wisconsin Creek Ltd. Independent 1989 Noble Fork Montana 0.5 MW
Wolf Creek: Wolf Creek, OR Wolf Creek Hwy. Water Dist. Independent 1987 Wolf Creek IdahoOregon 0.1 MW
Woods Creek 1 & 2: Woods Creek, WA Snohomish Co. PUD PUD 1982 Woods Creek, E. Fk. Washington .7 MW http://www.snopud.com/
Wynoochee: Wynoochee River, WA City of AberdeenTacoma Power Municipal 1994 Wynoochee River Washington 12.8 MW http://www.mytpu.org/tacomapower/ Boat Launch Area, Boat Ramp, Camping Area, Park, Picnic Area, Playground Area, Swimming Area, Tent, Trailer Sites, Visitor Center, Wildlife Area
Y-8: N. Side Main “Y” Canal, ID N. Side Canal Co. Independent 1983 N. Side Main "Y" Canal Idaho 0.1 MW
Yale: Lewis River, WA PacifiCorp IOU 1953 Lewis River Washington 134 MW http://www.pacificorp.com/index.html Access Area, Boat Launch Area, Boat Ramp, Camping Area, Organizational, Groups, Park, Picnic Area, Tent, Trailer Sites
Yellowtail: Bighorn River, MT Bureau of Reclamation Federal 1966 Bighorn River Montana 250.0 MW http://www.usbr.gov/projects/Facility.jsp?fac_Name=Yellowtail+Dam
Yelm: Nisqually River, WA City of Centralia Municipal 1930 Nisqually River Washington 12 MW http://www.cityofcentralia.com/
Youngs Creek: Youngs Creek, WA Snohomish Co. PUD PUD 2011 Youngs Creek Washington 7.5 MW http://www.snopud.com/