List of dams in the Columbia River watershed

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Dams of the Columbia River Basin. Click to view higher resolution and read legend.

There are more than 60 dams in the Columbia River watershed in the United States and Canada. Tributaries of the Columbia River and their dammed tributaries, as well as the main stem itself, each have their own list below. The dams are listed in the order as they are found from source to terminus. Many of the dams in the Columbia River watershed were not created for the specific purposes of water storage or flood protection. Instead, the primary purpose of many of these dams is to produce hydroelectricity. As can be seen in the lists, these dams provide a relatively significant amount of power.

Major dam construction began in the early 20th century and picked up the pace after the Columbia River Treaty in the 1960s, by the mid 1980s all the big dams were finished. Including just the dams listed below, there are 60 dams in the watershed, with 14 on the Columbia, 20 on the Snake, seven on the Kootenay, seven on the Pend Oreille / Clark, two on the Flathead, eight on the Yakima, and two on the Owyhee. Averaging a major dam every 72 miles (116 km), the rivers in the Columbia watershed combine to generate over 36,000 megawatts of power, with the majority coming on the main stem. Grand Coulee Dam is the largest producer of hydroelectric power in the United States,[1] generating 6,809 megawatts, over one-sixth of all power in the basin.

In addition to providing ample power for the people of the Pacific Northwest, the reservoirs created by the dams have created numerous recreational opportunities, including fishing, boating, and windsurfing. Furthermore, by creating a constant flow and consistent depth along the river channel, the series of locks and dams have allowed for Lewiston, Idaho, to become the furthest inland seaport on the west coast of the United States.[2] Despite the numerous benefits to humans that the dams have provided, a number of environmental consequences have manifested as a result of the dams, including a negative impact on salmonid populations of the basin.[3]

The organization of the following lists begins with the Columbia River dams and is followed by dams on its tributaries (in order of length) and their respective watersheds. Additionally, the table of contents below is indented to indicate tributary status of each river.

Main stem Columbia River dams[edit]

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Mica Dam 240 m (790 ft)[4] 1,805[5]  British Columbia 52°04′39″N 118°33′59″W / 52.07750°N 118.56639°W / 52.07750; -118.56639 1973 BC Hydro Kinbasket Lake MicaDam.JPG
Revelstoke Dam 175 m (574 ft)[6] 2,480[5]  British Columbia 51°02′57″N 118°11′36″W / 51.04917°N 118.19333°W / 51.04917; -118.19333 1984 BC Hydro Revelstoke Lake Aeriel picture, Revelstoke Dam.jpg
Keenleyside Dam 52 m (171 ft)[7] 185[8]  British Columbia 49°20′18″N 117°46′18″W / 49.33833°N 117.77167°W / 49.33833; -117.77167 1968 BC Hydro Raised Arrow Lakes Hugh Keenlyside Dam (104940381).jpg
Grand Coulee Dam 550 ft (170 m)[9] 6,809[9]  Washington 47°57′26″N 118°58′39″W / 47.95722°N 118.97750°W / 47.95722; -118.97750 1941 / 1974 [n 1] USBR Franklin D. Roosevelt Lake GrandCouleeDam2USBORJune2011.jpg
Chief Joseph Dam 236 ft (72 m)[10] 2,620[11]  Washington 47°59′42″N 119°38′19″W / 47.99500°N 119.63861°W / 47.99500; -119.63861 1955 USACE Rufus Woods Lake Chief Joseph Dam.jpg
Wells Dam 160 ft (49 m)[12] 840[13]  Washington 47°56′50″N 119°51′51″W / 47.94722°N 119.86417°W / 47.94722; -119.86417 1967 Douglas PUD Lake Pateros Wellsdam-bpa.jpg
Rocky Reach Dam 130 ft (40 m)[14] 1,287[15]  Washington 47°31′59″N 120°17′41″W / 47.53306°N 120.29472°W / 47.53306; -120.29472 1961 Chelan PUD Lake Entiat RockyReachDam.jpg
Rock Island Dam 135 ft (41 m)[16] 660[17]  Washington 47°20′33″N 120°05′40″W / 47.34250°N 120.09444°W / 47.34250; -120.09444 1933[18] Chelan PUD Rock Island Pool ROCK ISLAND DAM IS THE OLDEST DAM ON THE COLUMBIA RIVER - NARA - 548012.jpg
Wanapum Dam 185 ft (56 m)[19] 1,092[19]  Washington 46°52′40″N 119°58′13″W / 46.87778°N 119.97028°W / 46.87778; -119.97028 1963 Grant PUD Lake Wanapum Aerial - Wanapum Dam to Vantage, WA, Columbia River 01 - white balanced (9793434594).jpg
Priest Rapids Dam 178 ft (54 m)[20] 955.6[21]  Washington 46°38′39″N 119°54′36″W / 46.64417°N 119.91000°W / 46.64417; -119.91000 1961 Grant PUD Priest Rapids Lake RstRpdsDam1.jpg
McNary Dam 183 ft (56 m)[22] 1,133[23]  Washington /
 Oregon border
45°56′07″N 119°17′53″W / 45.93528°N 119.29806°W / 45.93528; -119.29806 1954 USACE Lake Wallula McNary Dam, Umatilla, Oregon.jpg
John Day Dam 184 ft (56 m) 2,485[24]  Washington /
 Oregon border
45°42′57″N 120°41′37″W / 45.71583°N 120.69361°W / 45.71583; -120.69361 1971 USACE Lake Umatilla John day dam 1998 COE.jpg
The Dalles Dam 260 ft (79 m) 2,038[25]  Washington /
 Oregon border
45°36′50″N 121°08′02″W / 45.61389°N 121.13389°W / 45.61389; -121.13389 1957 USACE Lake Celilo The Dalles Dam USGS.jpg
Bonneville Dam 197 ft (60 m)[26] 1,190[27]  Washington /
 Oregon border
45°38′42″N 121°56′27″W / 45.64500°N 121.94083°W / 45.64500; -121.94083 1937 / 1981 [n 2] USACE Lake Bonneville Corps-engineers-archives bonneville dam looking east.jpg

Snake River dams[edit]

Note: Dams are listed in order from headwater (Two Oceans Plateau) to mouth (Columbia River, WA).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Jackson Lake Dam 65.5 ft (20.0 m)[28] n/a[29]  Wyoming 43°51′30″N 110°35′24″W / 43.85833°N 110.59000°W / 43.85833; -110.59000 1911 / 1916 / 1989[n 3] USBR Jackson Lake Jackson Lake and Jackson Lake Dam, Grand Teton National Park 20110818 1.jpg
Palisades Dam 270 ft (82 m)[30] 176.6[30]  Idaho 43°19′59″N 111°12′12″W / 43.33306°N 111.20333°W / 43.33306; -111.20333 1957 USBR Palisades Reservoir Palisades.jpg
Gem State Dam 40 ft (12 m) 22.6[31]  Idaho 43°25′19″N 112°06′08″W / 43.42194°N 112.10222°W / 43.42194; -112.10222 1982 City of Idaho Falls
American Falls Dam 104 ft (32 m)[32] 112.4[33]  Idaho 42°46′43″N 112°52′35″W / 42.77861°N 112.87639°W / 42.77861; -112.87639 1927 / 1978[n 4] USBR American Falls Reservoir American Falls Dam.jpg
Minidoka Dam 86 ft (26 m)[34] 28.5[34]  Idaho 42°40′10″N 113°29′03″W / 42.66944°N 113.48417°W / 42.66944; -113.48417 1909-1942[34] USBR Lake Walcott MinidokaDam2005USBOR.jpg
Milner Dam 38 ft (12 m)[35] 59.5[36]  Idaho 42°31′30″N 114°00′35″W / 42.52500°N 114.00972°W / 42.52500; -114.00972 1905 Milner Dam, Inc. Milner Lake Milner-dam-id-us.jpg
Twin Falls Dam 25 ft (7.6 m)[n 5] 52.9[37]  Idaho 42°35′21″N 114°21′20″W / 42.58917°N 114.35556°W / 42.58917; -114.35556 1935 / 1995[n 6] Idaho Power Company Twin Falls Reservoir[n 5] Twin Falls Dam 1989.jpg
Shoshone Falls Dam 16 ft (4.9 m)[38] 64[39]  Idaho 42°35′47″N 114°24′04″W / 42.59639°N 114.40111°W / 42.59639; -114.40111 1907[39] Idaho Power Company Shoshone Falls Reservoir 2013-07-07 17 41 52 Shoshone Falls in Idaho viewed from the northwest.jpg
Upper Salmon Falls Dam 18 ft (5.5 m)[n 5] 34.5[36]  Idaho 42°45′59″N 114°53′45″W / 42.76639°N 114.89583°W / 42.76639; -114.89583 1937 / 1947[n 7] Idaho Power Company Upper Salmon Falls Reservoir[n 5]
Lower Salmon Falls Dam 38 ft (12 m)[40] 60[36]  Idaho 42°50′30″N 114°54′54″W / 42.84167°N 114.91500°W / 42.84167; -114.91500 1910 / 1949[n 8] Idaho Power Company Lower Salmon Falls Reservoir
Bliss Dam 84 ft (26 m)[40] 75[36]  Idaho 42°54′49″N 115°04′16″W / 42.91361°N 115.07111°W / 42.91361; -115.07111 1950 Idaho Power Company Bliss Reservoir
C. J. Strike Dam 115 ft (35 m) 82.8[41]  Idaho 42°56′51″N 115°58′31″W / 42.94750°N 115.97528°W / 42.94750; -115.97528 1952[41] Idaho Power Company C. J. Strike Reservoir
Swan Falls Dam 107 ft (33 m) 25[n 9]  Idaho 43°14′35″N 116°22′46″W / 43.24306°N 116.37944°W / 43.24306; -116.37944 1901 Idaho Power Company Swan Falls Reservoir[n 5] Swan Falls Dam Before Sunrise.jpg
Brownlee Dam 420 ft (130 m)[44] 585[45]  Idaho /
 Oregon border
44°50′13″N 116°54′03″W / 44.83694°N 116.90083°W / 44.83694; -116.90083 1959 / 1980[n 10] Idaho Power Company Brownlee Reservoir Brownlee.jpg
Oxbow Dam 175 ft (53 m)[46] 220[47]  Idaho /
 Oregon border
44°58′15″N 116°50′07″W / 44.97083°N 116.83528°W / 44.97083; -116.83528 1961 Idaho Power Company Oxbow Reservoir Oxbowdam.jpg
Hells Canyon Dam 330 ft (100 m)[48] 450[49]  Idaho /
 Oregon border
45°14′34″N 116°42′05″W / 45.24278°N 116.70139°W / 45.24278; -116.70139 1967 Idaho Power Company Hells Canyon Reservoir Hells Canyon Dam - 2.jpg
Lower Granite Dam 181 feet (55 m)[50] 932[51]  Washington 46°39′40″N 117°25′41″W / 46.66111°N 117.42806°W / 46.66111; -117.42806 1975 / 1987 [n 11] USACE Lower Granite Lake LwrGrDam2.jpg
Little Goose Dam 253 ft (77 m)[53] 932[54]  Washington 46°35′13″N 118°01′40″W / 46.58694°N 118.02778°W / 46.58694; -118.02778 1970 USACE Lake Bryan LGLandDam2.jpg
Lower Monumental Dam 152 ft (46 m)[55] 930[56]  Washington 46°33′48″N 118°32′20″W / 46.56333°N 118.53889°W / 46.56333; -118.53889 1969 USACE Lake Herbert G. West LwrMnDam2.jpg
Ice Harbor Dam 213 ft (65 m)[57] 693[58]  Washington 46°14′58″N 118°52′47″W / 46.24944°N 118.87972°W / 46.24944; -118.87972 1961 / 1976 [n 12] USACE Lake Sacajawea IcHrbrDam2.jpg

Salmon River dams[edit]

Little Salmon River dams[edit]

Note: Dams are listed in order from headwater (north West Mountain) to mouth (Salmon River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Goose Lake Dam (Goose Creek)[59] 26 ft (7.9 m) 0  Idaho 45°04′13″N 116°10′09″W / 45.07028°N 116.16917°W / 45.07028; -116.16917 1924 Ca Campbell Company Goose Lake
Brundage Dam (Brundage Creek(Goose Creek))[60] 64 ft (20 m) 0  Idaho 45°02′30″N 116°07′53″W / 45.04167°N 116.13139°W / 45.04167; -116.13139 1989 Brundage Reservoir Company Brundage Reservoir

Owyhee River dams[edit]

Note: Dams are listed in order from headwater (near Double Mountain, Nevada) to mouth (Snake River, OR/ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Wild Horse Dam 114 ft (35 m)[61][62] 0  Nevada 41°41′14″N 115°50′43″W / 41.68722°N 115.84528°W / 41.68722; -115.84528 1937 / 1969[n 13] BIA[64] Wild Horse Reservoir 2014-08-19 13 19 36 Wild Horse Dam, Nevada.JPG
Antelope Reservoir Dam (Antelope Creek (Jordan Creek))[65] 60 ft (18 m) 0  Oregon 42°54′0″N 117°13′48″W / 42.90000°N 117.23000°W / 42.90000; -117.23000 1923 Jordan Valley Irrigation District Antelope Reservoir
Owyhee Dam 417 ft (127 m)[66] 5[n 14],8[n 15],2[n 16]  Oregon 43°38′31″N 117°14′33″W / 43.64194°N 117.24250°W / 43.64194; -117.24250 1932[66] USBR Lake Owyhee DAM AFTERBAY, WITH OWYEE RIVER IN FOREGROUND, SHOWING OUTLET TUNNEL PORTAL (LEFT) AND POWERHOUSE AND ENTRANCE PORTAL TO DAM INTERIOR (RIGHT). NOTE RELEASE OF WATER FROM NEEDLE HAER ORE,23-NYS.V,1-6.tif
South Fork Owyhee River dams[edit]

Note: Dams are listed in order from headwater (north Tuscarora Mountains, Nevada) to mouth (Owyhee River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Wilson Reservoir Dam (Wilson Creek)[67] 34 ft (10 m) 0  Nevada 41°40′12″N 116°20′24″W / 41.67000°N 116.34000°W / 41.67000; -116.34000 Petan Company Wilson Reservoir
Bull Run Dam (Bull Run Creek)[68] 69 ft (21 m) 0  Nevada 41°38′24″N 116°09′0″W / 41.64000°N 116.15000°W / 41.64000; -116.15000 Petan Company Bull Run Reservoir
Dry Creek Dam (Indian Creek)[69] 70 ft (21 m) 0  Nevada 41°47′24″N 116°13′48″W / 41.79000°N 116.23000°W / 41.79000; -116.23000 Petan Company Dry Creek Reservoir
Rawhide Reservoir Dam (Indian Creek)[70] 33 ft (10 m) 0  Nevada 41°42′36″N 116°20′24″W / 41.71000°N 116.34000°W / 41.71000; -116.34000 Petan Company Rawhide Reservoir
Sheep Creek Dam (Sheep Creek)[71] 29 ft (8.8 m) 0  Nevada 41°51′36″N 116°16′12″W / 41.86000°N 116.27000°W / 41.86000; -116.27000 1966 United States Bureau of Indian Affairs, Shoshone and Paiute Tribes Sheep Creek Reservoir
Chimney Creek Dam (Fourmile Creek)[72] 20 ft (6.1 m) 0  Nevada 41°42′36″N 116°32′24″W / 41.71000°N 116.54000°W / 41.71000; -116.54000 Roaring Springs Associates Desert Ranch Reservoir

Malheur River dams[edit]

Note: Dams are listed in order from headwater (Logan Valley) to mouth (Snake River, OR/ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Warm Springs Dam[73][74] 106 ft (32 m) proposed 2.7[75]  Oregon 43°57′36″N 118°21′36″W / 43.96000°N 118.36000°W / 43.96000; -118.36000 1919 United States Bureau of Reclamation Warm Springs Reservoir Warm Springs Dam 1.jpg
Agency Valley Dam (North Fork Malheur River)[74][76] 110 ft (34 m) proposed 2.0[77]  Oregon 43°54′36″N 118°09′36″W / 43.91000°N 118.16000°W / 43.91000; -118.16000 1935 United States Bureau of Reclamation Beulah Reservoir Agency Valley Dam.jpg
Harper Diversion Dam[74] 12 ft (3.7 m) 0  Oregon 1930 United States Bureau of Reclamation Harper Diversion Pool
Bully Creek Dam (Bully Creek)[74][78] 121 ft (37 m) 0  Oregon 43°0′36″N 117°24′0″W / 43.01000°N 117.40000°W / 43.01000; -117.40000 1963 United States Bureau of Reclamation Bully Creek Reservoir Bully Creek Dam, Malheur County, Oregon.jpg
Bully Creek Diversion Dam (Bully Creek)[74] 4 ft (1.2 m) 0  Oregon 1964 United States Bureau of Reclamation Bully Creek Diversion Pool
Willow Creek Reservoir #3 Dam (Willow Creek)[79] 110 ft (34 m) 0  Oregon 44°21′0″N 117°40′12″W / 44.35000°N 117.67000°W / 44.35000; -117.67000 1944 Orchard Water Company Malheur Reservoir Willow Creek Dam (Morrow County, Oregon scenic images) (morD0110).jpg

Grande Ronde River dams[edit]

Wallowa River dams[edit]

Note: Dams are listed in order from headwater (near Pete's Point, Eagle Cap Wilderness) to mouth (Grande Ronde River, OR)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Wallowa Lake Dam[80] 40 ft (12 m) 0  Oregon 45°19′48″N 117°13′12″W / 45.33000°N 117.22000°W / 45.33000; -117.22000 1931 Associated Ditch Companies Raised Wallowa Lake

Powder River dams[edit]

Note: Dams are listed in order from headwater (confluence of McCully Fork and Cracker Creek) to mouth (Snake River, OR/ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Mason Dam[81][82] 173 ft (53 m) proposed 3.4[83]  Oregon 44°40′12″N 117°59′24″W / 44.67000°N 117.99000°W / 44.67000; -117.99000 1968 United States Bureau of Reclamation Philips Lake Burnt River dam.jpg
Thief Valley Dam[82][84] 73 ft (22 m) 0  Oregon 45°0′36″N 117°46′12″W / 45.01000°N 117.77000°W / 45.01000; -117.77000 1932 United States Bureau of Reclamation Thief Valley Reservoir

Blackfoot River dams[edit]

Note: Dams are listed in order from headwater (confluence of Diamond and Lanes Creeks) to mouth (Snake River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Blackfoot Dam 44 ft (13 m)[85] 0  Idaho 43°0′0″N 111°42′36″W / 43.00000°N 111.71000°W / 43.00000; -111.71000[86] 1911[86] United States Bureau of Indian Affairs[86] Blackfoot Reservoir

Henrys Fork dams[edit]

Note: Dams are listed in order from headwater (Henrys Lake) to mouth (Snake River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Henrys Lake Dam 18 ft (5.5 m)[87] 0  Idaho 44°35′24″N 111°21′0″W / 44.59000°N 111.35000°W / 44.59000; -111.35000[87] 1923[87] North Fork Reservoir Company[87] Raised Henrys Lake
Island Park Dam 94 ft (29 m)[88] 4.8[33]  Idaho 44°25′12″N 111°23′24″W / 44.42000°N 111.39000°W / 44.42000; -111.39000[88] 1938[88] United States Bureau of Reclamation[33] Island Park Reservoir Islandparkdam.jpg
Buffalo River Dam (Buffalo River)[89] 12 ft (3.7 m) 0.25  Idaho 44°24′52″N 111°23′34″W / 44.41444°N 111.39278°W / 44.41444; -111.39278 1980 Fall River Rural Electric Cooperative, Inc. Buffalo Dam Pool
Ashton Dam[90] 56.6 ft (17.3 m) 6.85  Idaho 44°04′12″N 111°29′24″W / 44.07000°N 111.49000°W / 44.07000; -111.49000[91] 1913[91] PacifiCorp Ashton Dam Lake
Chester Dam (Crosscut Diversion Dam)[92] 14.5 ft (4.4 m) 3.3[93]  Idaho 44°0′36″N 111°34′48″W / 44.01000°N 111.58000°W / 44.01000; -111.58000 1938 Fremont-Madison Irrigation District Chester Dam Pool
Fall River dams[edit]

Note: Dams are listed in order from headwater (Pitchstone Plateau) to mouth (Henrys Fork, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Grassy Lake Dam (Grassy Creek) 118 ft (36 m)[33] 0  Wyoming 44°07′48″N 110°48′36″W / 44.13000°N 110.81000°W / 44.13000; -110.81000[94] 1939[94] United States Bureau of Reclamation[33] Grassy Lake Grassy Lake Dam WY1.jpg

Portneuf River dams[edit]

Note: Dams are listed in order from headwater (southeast of Higham Peak) to mouth (Snake River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Portneuf Dam[95] 47 ft (14 m) 0  Idaho 42°52′12″N 111°56′24″W / 42.87000°N 111.94000°W / 42.87000; -111.94000 1912 Portneuf-Marsh Valley Canal Company Chesterfield Reservoir

Salmon Falls Creek dams[edit]

Note: Dams are listed in order from headwater (Jarbidge Mountains) to mouth (Snake River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Salmon Falls Dam[96] 217 ft (66 m) 0  Idaho 42°12′36″N 114°43′48″W / 42.21000°N 114.73000°W / 42.21000; -114.73000 1911 Salmon River Canal Company, Ltd. Salmon Falls Creek Reservoir 2013-07-07 16 29 46 Salmon Falls Creek Dam in Idaho viewed from the west.jpg
Cedar Creek Dam (Cedar Creek)[97] 84 ft (26 m) 0  Idaho 42°13′12″N 114°52′12″W / 42.22000°N 114.87000°W / 42.22000; -114.87000 1920 Cedar Mesa Reservoir And Canal Company Cedar Creek Reservoir

Boise River dams[edit]

Note: Dams are listed in order from headwater (confluence of North and Middle Forks Boise River) to mouth (Snake River, ID/OR)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Arrowrock Dam[98] 350 ft (110 m) 15[99]  Idaho 43°36′0″N 115°55′12″W / 43.60000°N 115.92000°W / 43.60000; -115.92000 1915 United States Bureau of Reclamation Arrowrock Reservoir Arrowrock Dam.jpg
Lucky Peak Dam[100] 340 ft (100 m) 101.25[101]  Idaho 43°31′12″N 116°03′0″W / 43.52000°N 116.05000°W / 43.52000; -116.05000 1955 United States Army Corps of Engineers Lucky Peak Lake USACE Lucky Peak Dam Idaho.jpg
Boise River Diversion Dam[102] 68 ft (21 m) 3.3[99]  Idaho 43°31′48″N 116°05′24″W / 43.53000°N 116.09000°W / 43.53000; -116.09000 1908 United States Bureau of Reclamation Boise River Diversion Dam Pool BoiseRiverDiversionDam2.jpg
Barber Dam[103] 25 ft (7.6 m) 4.14[104]  Idaho 43°34′12″N 116°07′12″W / 43.57000°N 116.12000°W / 43.57000; -116.12000 1904 Ada County and Fulcrum Inc. Barber Dam Pool BarberDam1979.jpg
South Fork Boise River dams[edit]

Note: Dams are listed in order from headwater (confluence of Ross Fork and Johnson Creek) to mouth (Boise River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Anderson Ranch Dam[105] 456 ft (139 m) 40[99]  Idaho 43°21′36″N 115°26′24″W / 43.36000°N 115.44000°W / 43.36000; -115.44000 1947 United States Bureau of Reclamation Anderson Ranch Reservoir Anderson Ranch Dam and Reservoir.JPG
Little Camas Dam (Little Camas Creek)[106] 44 ft (13 m) 0  Idaho 43°21′0″N 115°22′48″W / 43.35000°N 115.38000°W / 43.35000; -115.38000 1912 Mountain Home Irrigation District Little Camas Reservoir

Goose Creek dams[edit]

Note: Dams are listed in order from headwater (near Monument Peak (Idaho)) to mouth (Snake River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Oakley Dam[107] 139 ft (42 m) 0  Idaho 42°11′24″N 113°54′36″W / 42.19000°N 113.91000°W / 42.19000; -113.91000 1916 Oakley Canal Company Lower Goose Creek Reservoir

Weiser River dams[edit]

Note: Dams are listed in order from headwater (near Brush Mountain) to mouth (Snake River, ID/OR)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Lost Valley Dam (Lost Creek(West Fork Weiser River))[108] 52 ft (16 m) 0  Idaho 44°57′23″N 116°28′02″W / 44.95639°N 116.46722°W / 44.95639; -116.46722 1929 Lost Valley Reservoir Company Lost Valley Reservoir
C Ben Ross Dam (Little Weiser River)[109] 56 ft (17 m) 0  Idaho 44°31′12″N 116°26′24″W / 44.52000°N 116.44000°W / 44.52000; -116.44000 1937 Little Weiser River Irrigation District Ben Ross Reservoir
Crane Creek Dam (Crane Creek)[110] 55 ft (17 m) 0  Idaho 44°21′0″N 116°36′36″W / 44.35000°N 116.61000°W / 44.35000; -116.61000 1912 Crane Creek Reservoir Administration Board Crane Creek Reservoir
Mann Creek Dam (Mann Creek)[111] 148 ft (45 m) 0[112]  Idaho 44°23′24″N 116°53′24″W / 44.39000°N 116.89000°W / 44.39000; -116.89000 1967 United States Bureau of Reclamation Mann Creek Reservoir

Burnt River dams[edit]

Note: Dams are listed in order from headwater (confluence of North and South Fork Burnt River) to mouth (Snake River, OR/ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Unity Dam[113][114] 82 ft (25 m) proposed 0.8[115]  Oregon 43°30′0″N 118°10′48″W / 43.50000°N 118.18000°W / 43.50000; -118.18000 1938 United States Bureau of Reclamation Unity Reservoir Burnt River dam.jpg

Willow Creek dams[edit]

Note: Dams are listed in order from headwater (Blackfoot Mountains) to mouth (Snake River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Ririe Dam 253 ft (77 m)[116] 0  Idaho 43°34′48″N 111°44′24″W / 43.58000°N 111.74000°W / 43.58000; -111.74000[117] 1977[117] United States Bureau of Reclamation[117] Ririe Reservoir Ririedam.jpg

Payette River dams[edit]

Note: Dams are listed in order from headwater (confluence of South and Middle Forks Payette River) to mouth (Snake River, ID/OR)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Black Canyon Diversion Dam[118] 183 ft (56 m) 10.2[99]  Idaho 43°52′48″N 116°28′48″W / 43.88000°N 116.48000°W / 43.88000; -116.48000 1924 United States Bureau of Reclamation Black Canyon Reservoir
North Fork Payette River dams[edit]

Note: Dams are listed in order from headwater (Squaw Meadows) to mouth (Payette River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Upper Payette Lake Dam[119] 18 ft (5.5 m) 0  Idaho 45°06′40″N 116°01′35″W / 45.11111°N 116.02639°W / 45.11111; -116.02639 1952 Lake Reservoir Company Upper Payette Lake
Granite Lake Dam (Fisher Creek)[120] 28 ft (8.5 m) 0  Idaho 45°06′02″N 116°04′51″W / 45.10056°N 116.08083°W / 45.10056; -116.08083 1963 Lake Reservoir Company Granite Lake
Payette Lake Dam[121] 8.2 ft (2.5 m) 0  Idaho 44°54′36″N 116°06′36″W / 44.91000°N 116.11000°W / 44.91000; -116.11000 1943 Lake Reservoir Company Raised Payette Lake
Little Payette Lake Dam (Lake Fork)[122] 15.8 ft (4.8 m) 0  Idaho 44°54′0″N 116°02′24″W / 44.90000°N 116.04000°W / 44.90000; -116.04000 1926 Lake Fork Irrigation District Little Payette Lake
Cascade Dam[123] 107 ft (33 m) 12.8[99]  Idaho 44°31′12″N 116°03′0″W / 44.52000°N 116.05000°W / 44.52000; -116.05000 1948 United States Bureau of Reclamation Lake Cascade Cascade-dam-id-us.png
Sage Hen Dam(Sage Hen Creek(Second Fork Squaw Creek))[124] 38 ft (12 m) 0  Idaho 44°19′12″N 116°11′24″W / 44.32000°N 116.19000°W / 44.32000; -116.19000 1938 Squaw Creek Irrigation Company Sage Hen Reservoir
Paddock Valley Dam (Little Willow Creek)[125] 43 ft (13 m) 0  Idaho 44°11′24″N 116°35′24″W / 44.19000°N 116.59000°W / 44.19000; -116.59000 1949 Little Willow Irrigation District Paddock Valley Reservoir
South Fork Payette River dams[edit]

Note: Dams are listed in order from headwater (near Parks Peak) to mouth (Payette River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Deadwood Dam (Deadwood River)[126] 183 ft (56 m) 0[99]  Idaho 44°17′24″N 115°38′24″W / 44.29000°N 115.64000°W / 44.29000; -115.64000 1931 United States Bureau of Reclamation Deadwood Reservoir Deadwood Dam Construction 2.jpg

Clearwater River dams[edit]

North Fork Clearwater River dams[edit]

Note: Dams are listed in order from headwater (near Illinois Peak) to mouth (Clearwater River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Dworshak Dam 717 ft (219 m)[127] 400  Idaho 46°30′N 116°18′W / 46.500°N 116.300°W / 46.500; -116.300 1973 Army Corps of Engineers Dworshak Reservoir Dworshak Dam 1.jpg

Malad River dams[edit]

Big Wood River dams[edit]

Note: Dams are listed in order from headwater (near Galena Summit) to mouth (Malad River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Magic Dam 128 ft (39 m)[128] 9[129]  Idaho 43°15′0″N 114°22′12″W / 43.25000°N 114.37000°W / 43.25000; -114.37000[128] 1910[128] Magic Reservoir Hydroelectric, Inc.[128] Magic Reservoir
Camas Creek[edit]

Note: Dams are listed in order from headwater (near Packer Butte) to mouth (Big Wood River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Mormon Dam (McKinney Creek) 23 ft (7.0 m)[130] 0  Idaho 43°16′48″N 114°48′0″W / 43.28000°N 114.80000°W / 43.28000; -114.80000 1908 Twin Lakes Reservoir and Irrigation Company Mormon Reservoir
Little Wood River dams[edit]

Note: Dams are listed in order from headwater (Standhope Peak) to mouth (Malad River, ID)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Little Wood Dam 169 ft (52 m)[131] 3[132]  Idaho 43°25′12″N 114°01′12″W / 43.42000°N 114.02000°W / 43.42000; -114.02000[131] 1962[131] United States Bureau of Reclamation[131] Little Wood Reservoir
Fish Creek Dam (Fish Creek) 88 ft (27 m)[133] 0  Idaho 43°25′12″N 114°49′48″W / 43.42000°N 114.83000°W / 43.42000; -114.83000[133] 1923[133] Carey Valley Reservoir Company[133] Fish Creek Reservoir

Kootenay River dams[edit]

Note: Dams are listed in order from headwater (Canadian Rockies) to mouth (Columbia River, BC).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Libby Dam 420 ft (130 m)[134] 604[135]  Montana 48°24′37″N 115°18′52″W / 48.41028°N 115.31444°W / 48.41028; -115.31444 1972[136] USACE Lake Koocanusa Libby Dam (Libby Montana) 1986.jpg
Corra Linn Dam 16 m (52 ft)[137] 51[137]  British Columbia 49°28′04″N 117°28′02″W / 49.46778°N 117.46722°W / 49.46778; -117.46722 1932[137] FortisBC raised Kootenay Lake Corra Linn Dam 20140902.jpg
Upper Bonnington Falls Dam 21 m (69 ft)[138] 53[8]  British Columbia 49°27′35″N 117°29′03″W / 49.45972°N 117.48417°W / 49.45972; -117.48417 1907[8] FortisBC
Lower Bonnington Falls Dam 21 m (69 ft)[139] 25[8]  British Columbia 49°27′39″N 117°29′59″W / 49.46083°N 117.49972°W / 49.46083; -117.49972 1925[8] FortisBC Lower Bonnington Falls Power House.jpg
South Slocan Dam 18 m (59 ft)[140] 57[8]  British Columbia 49°27′20″N 117°31′11″W / 49.45556°N 117.51972°W / 49.45556; -117.51972 1928[8] FortisBC
Kootenay Canal Generating Station[n 17] 84 m (276 ft)[141] 583[8]  British Columbia 49°27′10″N 117°31′02″W / 49.45278°N 117.51722°W / 49.45278; -117.51722 1976[8] BC Hydro Kootenay Canal.jpg
Brilliant Dam 42.6 m (140 ft)[142] 260[n 18]  British Columbia 49°19′29″N 117°37′12″W / 49.32472°N 117.62000°W / 49.32472; -117.62000 1944 / 2007[n 18] Columbia Power Corporation Brilliant Dam.jpg

Pend Oreille River / Clark Fork River dams[edit]

Note: Dams are listed in order from headwater of Clark Fork River (Silver Bo Creek, Montana) to mouth of Pend Oreille River (Columbia River, BC).[n 19]

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Clark Fork
Thompson Falls Dam 110 ft (34 m)[143][n 20] 94[147]  Montana 47°35′28″N 115°21′03″W / 47.59111°N 115.35083°W / 47.59111; -115.35083 1915[144] Northwestern Energy Thompson Falls Reservoir THOMPSON FALLS HYDROELECTRIC DAM H.D.; SANDERS COUNTY.jpg
Noxon Rapids Dam 260 ft (79 m)[148] 527[149]  Montana 47°57′39″N 115°44′01″W / 47.96083°N 115.73361°W / 47.96083; -115.73361 1959[150] Avista Corp. Noxon Reservoir Noxon Reservoir.JPG
Cabinet Gorge Dam 208 ft (63 m)[151] 255[152]  Idaho 48°05′08″N 116°03′27″W / 48.08556°N 116.05750°W / 48.08556; -116.05750 1952[152] Avista Corp. Cabinet Gorge Reservoir HD.11C.084 (14740078038).jpg
Pend Oreille
Albeni Falls Dam 90 ft (27 m)[148] 42[148]  Idaho 48°10′48″N 116°59′59″W / 48.18000°N 116.99972°W / 48.18000; -116.99972 1955 USACE Raised Lake Pend Oreille 11.5 ft (3.5 m)[153] USACE Albeni Dam Idaho.jpg
Box Canyon Dam 62 ft (19 m)[148] 90[154]  Washington 48°46′49″N 117°24′46″W / 48.78028°N 117.41278°W / 48.78028; -117.41278 1956[155] Pend Oreille PUD Box Canyon Reservoir Box Canyon Dam WA Aerial.jpg
Boundary Dam 340 ft (100 m)[148] 1,040[148]  Washington 48°59′13″N 117°20′53″W / 48.98694°N 117.34806°W / 48.98694; -117.34806 1967 Seattle City Light Boundary Lake
Seven Mile Dam 79.2 m (260 ft)[156] 848  British Columbia 49°01′49″N 117°30′13″W / 49.03028°N 117.50361°W / 49.03028; -117.50361 1979[157] BC Hydro
Waneta Dam 75.9 m (249 ft)[156] 785[n 21]  British Columbia 49°00′14″N 117°36′42″W / 49.00389°N 117.61167°W / 49.00389; -117.61167 1954[156] Teck Resources

Flathead River dams[edit]

Note: Dams are listed in order from headwater (Canadian Rockies) to mouth (Clark Fork River).[n 22]

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Hungry Horse Dam[n 23] 564 ft (172 m)[160] 428[161]  Montana 48°20′28″N 114°00′47″W / 48.34111°N 114.01306°W / 48.34111; -114.01306 1953[162] USBR Hungry Horse Reservoir Hngryh2.jpg
Kerr Dam 205 ft (62 m)[163] 188[164]  Montana 47°40′38″N 114°14′02″W / 47.67722°N 114.23389°W / 47.67722; -114.23389 1938[162] PPL/Tribal Raised Flathead Lake 10 ft (3.0 m)[162] 2011-06-07 17-17-11 996.jpg

Deschutes River dams[edit]

Note: Dams are listed in order from headwater (Little Lava Lake) to mouth (Columbia River, WA).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Crane Prairie Dam 36 ft (11 m)[165] 0  Oregon 43°45′18″N 121°47′6″W / 43.75500°N 121.78500°W / 43.75500; -121.78500 1940[165] USBR Crane Prairie Reservoir Crane Prairie Dam.jpg
Wickiup Dam 100 ft (30 m)[165] 0  Oregon 43°41′43″N 121°42′14″W / 43.69528°N 121.70389°W / 43.69528; -121.70389 1949[165] USBR Wickiup Reservoir Wickiup Dam and Wickiup Reservoir in central Oregon.jpg
Round Butte Dam[166] 440 ft (130 m) 247.12  Oregon 44°36′0″N 121°16′12″W / 44.60000°N 121.27000°W / 44.60000; -121.27000[167] 1964 Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon Lake Billy Chinook Lake Billy Chinook (Jefferson County, Oregon scenic images) (jefDB1592).jpg
Pelton Dam[166] 204 ft (62 m) 100.8  Oregon 44°41′24″N 121°13′48″W / 44.69000°N 121.23000°W / 44.69000; -121.23000[168] 1957 Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon Lake Simtustus Pelton Dam (Jefferson County, Oregon scenic images) (jefD0009).jpg
Pelton Reregulating Dam[166] 88 ft (27 m) 18.9  Oregon 44°43′12″N 121°14′24″W / 44.72000°N 121.24000°W / 44.72000; -121.24000[169] 1958 Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon

Yakima River dams[edit]

Note: Dams are listed in order from headwater (Keechelus Lake) to mouth (Columbia River, WA).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Keechelus Dam 128 ft (39 m)[170] 0[171]  Washington 47°19′20″N 121°20′22″W / 47.32222°N 121.33944°W / 47.32222; -121.33944 1917[170] USBR Raised Keechelus Lake Photographic copy of photograph, photographer unknown, date unknown (original print located at U.S. Bureau of Reclamation Pacific Northwest Region Office, Boise, Idaho). Aerial view, HAER WA-80-49.tif
Easton Diversion Dam 66 ft (20 m)[172] 0[171]  Washington 47°14′30″N 121°11′17″W / 47.24167°N 121.18806°W / 47.24167; -121.18806 1929[173] USBR Lake Easton Easton Diversion Dam.jpg
Unnamed Diversion Dam 0  Washington 47°03′50″N 120°39′09″W / 47.06389°N 120.65250°W / 47.06389; -120.65250 USBR
Roza Diversion Dam 67 ft (20 m)[174] 12  Washington 46°44′56″N 120°27′56″W / 46.74889°N 120.46556°W / 46.74889; -120.46556 1939[175] USBR Roza Dam.jpg
Wapato Dam 19 ft (5.8 m)[176] 0  Washington 46°31′27″N 120°28′37″W / 46.52417°N 120.47694°W / 46.52417; -120.47694 Wapato Reservoir Wapato Dam.jpg
Sunnyside Dam 8 ft (2.4 m)[170] 0[171]  Washington 46°29′52″N 120°26′41″W / 46.49778°N 120.44472°W / 46.49778; -120.44472 1907[177] Sunnyside Valley Irrigation District Sunnyside Dam.jpg
Prosser Dam 9 ft (2.7 m)[178] 0  Washington 46°12′45″N 119°46′22″W / 46.21250°N 119.77278°W / 46.21250; -119.77278 1904[178] USBR Prosser Dam.jpg
Wannawish Dam 6.6 ft (2.0 m)[179] 0  Washington 46°22′43″N 119°25′02″W / 46.37861°N 119.41722°W / 46.37861; -119.41722 1892[179] Wannawish Dam.jpg

Cle Elum River dams[edit]

Note: Dams are listed in order from headwaters (near Mount Daniel) to mouth (Yakima River, WA).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Cle Elum Dam 165 ft (50 m)[170] 0[171]  Washington 47°14′49″N 121°4′23″W / 47.24694°N 121.07306°W / 47.24694; -121.07306 1933[170] USBR Raised Cle Elum Lake

Kachess River dams[edit]

Note: Dams are listed in order from headwaters (Three Queens) to mouth (Yakima River, WA).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Kachess Dam 115 ft (35 m)[170] 0[171]  Washington 47°15′53″N 121°12′9″W / 47.26472°N 121.20250°W / 47.26472; -121.20250 1912[170] USBR Raised Kachess Lake AERIAL VIEW OF KACHESS DAM, DOWNSTREAM FACE, VIEW SOUTH - Kachess Dam, Kachess River, 1.5 miles north of Interstate 90 , Easton, Kittitas County, WA HAER WA-79-6.tif

Naches River dams[edit]

Bumping River dams[edit]

Note: Dams are listed in order from headwaters (near Crag Mountain) to mouth (Naches River, WA).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Bumping Lake Dam 60 ft (18 m)[170] 0[171]  Washington 46°52′16″N 121°17′58″W / 46.87111°N 121.29944°W / 46.87111; -121.29944 1910[170] USBR Raised Bumping Lake
Tieton River dams[edit]

Note: Dams are listed in order from headwaters (Goat Rocks) to mouth (Naches River, WA).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Clear Lake Dam(North Fork Tieton) 83 ft (25 m)[170] 0[171]  Washington 46°37′40″N 121°16′15″W / 46.62778°N 121.27083°W / 46.62778; -121.27083 1915[170] USBR Clear Lake
Tieton Dam 319 ft (97 m)[170] 0[171]  Washington 46°39′26″N 121°7′41″W / 46.65722°N 121.12806°W / 46.65722; -121.12806 1925[170] USBR Rimrock Lake Tieton Dam from Lava Point, 2015.jpg

Willamette River dams[edit]

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Willamette Falls Dam 20 ft (6.1 m)[180] 15.18[181]  Oregon 45°21′11″N 122°37′04″W / 45.35306°N 122.61778°W / 45.35306; -122.61778 1888[18] Portland General Electric USACE Willamette Falls Oregon.jpg

Santiam River dams[edit]

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Big Cliff Dam (North Santiam)[182] 191 ft (58 m) 18  Oregon 44°45′03″N 122°16′59″W / 44.75083°N 122.28306°W / 44.75083; -122.28306 1953 Army Corps of Engineers Big Cliff Reservoir (reregulation for Detroit Reservoir) USACE Big Cliff Dam Oregon.jpg
Detroit Dam(North Santiam[182] 463 ft (141 m) 100  Oregon 44°43′18″N 122°15′01″W / 44.72167°N 122.25028°W / 44.72167; -122.25028 1953 Army Corps of Engineers Detoit Reservoir USACE Detroit Dam Oregon.jpg
Foster Dam (South Santiam)[183] 126 ft (38 m) 20  Oregon 44°24′55″N 122°40′13″W / 44.41528°N 122.67028°W / 44.41528; -122.67028 1968 Army Corps of Engineers Foster Reservoir (reregulation for Green Peter Reservoir) Foster Dam aerial.jpg
Green Peter Dam (South Santiam)[183] 327 ft (100 m) 80  Oregon 44°27′00″N 122°32′57″W / 44.45000°N 122.54917°W / 44.45000; -122.54917 1968 Army Corps of Engineers Green Peter Reservoir

Middle Fork Willamette River dams[edit]

Note: Dams are listed in order from headwater to mouth

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Hills Creek Dam 304 ft (93 m)[184] 30[184]  Oregon 43°42′33″N 122°25′26″W / 43.70917°N 122.42389°W / 43.70917; -122.42389 1961[184] USACE Hills Creek Reservoir Hills Creek Reservoir aerial.jpg
Lookout Point Dam 276 ft (84 m)[185] 150[185]  Oregon 43°54′48″N 122°45′09″W / 43.91333°N 122.75250°W / 43.91333; -122.75250 1954[185] USACE Lookout Point Lake Lookout Point Dam.jpg
Fall Creek Dam[186] 180 ft (55 m) 0  Oregon 43°54′49″N 122°45′25″W / 43.91361°N 122.75694°W / 43.91361; -122.75694 1966 Army Corps of Engineers Fall Creek Reservoir
Dexter Dam 93 ft (28 m)[185] 15[185]  Oregon 43°55′22″N 122°48′23″W / 43.92278°N 122.80639°W / 43.92278; -122.80639 1954[185] USACE Dexter Reservoir USACE Dexter Lake and Dam.jpg

McKenzie River dams[edit]

Note: Dams are listed in order from headwater (Clear Lake) to mouth (Willamette River).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Carmen Diversion Dam 17 ft (5.2 m)[187] 0[188]  Oregon 44°20′19″N 122°00′11″W / 44.33861°N 122.00306°W / 44.33861; -122.00306 1963[189] Eugene Water & Electric Board Carmen Reservoir
Trail Bridge Dam 90 ft (27 m)[190] 10[188]  Oregon 44°16′24″N 122°03′02″W / 44.27333°N 122.05056°W / 44.27333; -122.05056 1963[189] Eugene Water & Electric Board Trail Bridge Reservoir
Smith Dam (Smith River) 250 ft (76 m)[191] 104.5[188]  Oregon 44°0′0″N 122°06′36″W / 44.00000°N 122.11000°W / 44.00000; -122.11000[191] 1963[189] Eugene Water & Electric Board Smith Reservoir
Cougar Dam (South Fork)[192] 425 ft (130 m) 25  Oregon 44°07′44″N 122°14′30″W / 44.12889°N 122.24167°W / 44.12889; -122.24167 1963 Army Corps of Engineers Cougar Reservoir USACE Cougar Dam South Fork McKenzie River.jpg
Blue River Dam (Blue River)[192] 270 ft (82 m) 0  Oregon 44°10′23″N 122°19′47″W / 44.17306°N 122.32972°W / 44.17306; -122.32972 1969 Army Corps of Engineers Blue River Reservoir Blue River Dam.jpg
Leaburg Dam 20 ft (6.1 m)[193] 15.9[194]  Oregon 44°08′15″N 122°36′43″W / 44.13750°N 122.61194°W / 44.13750; -122.61194[193] 1929[194] Eugene Water & Electric Board Leaburg Reservoir Leaburg Dam (Lane County, Oregon scenic images) (lanDA0035).jpg
Walterville Dam 24 ft (7.3 m)[195] 9[194]  Oregon 44°03′36″N 122°49′48″W / 44.06000°N 122.83000°W / 44.06000; -122.83000[195] 1911[194] Eugene Water & Electric Board Walterville Reservoir

Coast Fork Willamette River dams[edit]

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Cottage Grove Dam 95 ft (29 m)[196] 0  Oregon 43°42′58″N 123°03′03″W / 43.71611°N 123.05083°W / 43.71611; -123.05083 1942[196] USACE Cottage Grove Lake Cottage Grove Dam.jpg
Dorena Dam (Row River) 145 ft (44 m)[196] 7.51[197]  Oregon 43°46′48″N 122°57′0″W / 43.78000°N 122.95000°W / 43.78000; -122.95000 1949[196] USACE Dorena Lake

Spokane River dams[edit]

Note: Dams are listed in order from headwater (Lake Coeur d'Alene) to mouth (Columbia River, WA).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Post Falls Hydroelectric Development 64 ft (20 m)[198] 15[198]  Idaho 47°42′31″N 116°57′13″W / 47.70861°N 116.95361°W / 47.70861; -116.95361 1908[198] Avista Raised Lake Coeur d'Alene
Upriver Dam 17.7[199]  Washington 47°41′09″N 117°19′43″W / 47.68583°N 117.32861°W / 47.68583; -117.32861 1894 / 1933[n 24] City of Spokane Upriver Dam Reservoir
Upper Falls Dam 35 ft (11 m)[200] 10[200]  Washington 47°39′46″N 117°24′55″W / 47.66278°N 117.41528°W / 47.66278; -117.41528 1922[200] Avista Upper Falls Reservoir
Monroe Street Dam 24 ft (7.3 m)[201] 15[201]  Washington 47°39′42″N 117°25′31″W / 47.66167°N 117.42528°W / 47.66167; -117.42528 1890[201] Avista Monroe Street Dam on Spokane River.jpg
Nine Mile Dam 58 ft (18 m)[202] 26[202]  Washington 47°46′30″N 117°32′38″W / 47.77500°N 117.54389°W / 47.77500; -117.54389 1908[202] Avista Nine Mile Reservoir VIEW OF SPILLWAY DAM AND POWERHOUSE FOREGROUND, SHOWING NINE MILE RESERVOIR IN LEFT BACKGROUND, LOOKING WEST - Nine Mile Hydroelectric Development, Dam, State Highway 291 HAER WASH,32-NIMIFA.V,1A-3.tif
Long Lake Dam 213 ft (65 m)[203] 71[203]  Washington 47°50′14″N 117°50′23″W / 47.83722°N 117.83972°W / 47.83722; -117.83972 1915[203] Avista Long Lake Long Lake Dam.jpg
Little Falls Dam 57 ft (17 m)[204] 36[205]  Washington 47°49′57″N 117°55′04″W / 47.83250°N 117.91778°W / 47.83250; -117.91778 1911[206] Avista Little Falls Pool

Cowlitz River dams[edit]

Note: Dams are listed in order from headwater (Cascade Mountains) to mouth (Columbia River, WA)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Cowlitz Falls Dam 140 ft (43 m)[207] 70[208]  Washington 46°27′59″N 122°06′33″W / 46.46639°N 122.10917°W / 46.46639; -122.10917 1994[208] Bonneville Power Administration Lake Scanewa
Mossyrock Dam 606 ft (185 m)[209] 300[209]  Washington 46°32′04″N 122°25′29″W / 46.53444°N 122.42472°W / 46.53444; -122.42472 1968[209] Tacoma Public Utilities Riffe Lake Mossyrock Dam.JPG
Mayfield Dam 250 ft (76 m)[210] 162[210]  Washington 46°30′10″N 122°35′18″W / 46.50278°N 122.58833°W / 46.50278; -122.58833 1963[210] Tacoma Public Utilities Lake Mayfield

Lewis River dams[edit]

Note: Dams are listed in order from headwater (Adams Glacier, Mount Adams) to mouth (Columbia River, WA)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Swift Dam[211] 512 ft (156 m) 240  Washington 46°04′48″N 122°12′36″W / 46.08000°N 122.21000°W / 46.08000; -122.21000[212] 1958 PacifiCorp Swift Reservoir
Swift No. 2 Dam[211] 83 ft (25 m)[213] 70  Washington 46°03′36″N 122°11′24″W / 46.06000°N 122.19000°W / 46.06000; -122.19000[213] 1959[213] Public Utility District No. 1 of Cowlitz County
Yale Dam[211] 323 ft (98 m) 134  Washington 45°58′48″N 122°20′24″W / 45.98000°N 122.34000°W / 45.98000; -122.34000[214] 1953 PacifiCorp Yale Lake
Merwin Dam[211] 313 ft (95 m) 136  Washington 45°59′24″N 122°28′48″W / 45.99000°N 122.48000°W / 45.99000; -122.48000[215] 1931 PacifiCorp Lake Merwin

Wenatchee River dams[edit]

Note: Dams are listed in order from headwater (Lake Wenatchee) to mouth (Columbia River, WA)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Tumwater Canyon Dam[216] 23 ft (7.0 m) 0  Washington 47°36′59″N 120°43′22″W / 47.61639°N 120.72278°W / 47.61639; -120.72278 1909 Chelan County Public Utility District Lake Jolanda

Chelan River dams[edit]

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Lake Chelan Dam 40 ft (12 m)[217] 59.2[217]  Washington 47°50′04″N 120°00′45″W / 47.83444°N 120.01250°W / 47.83444; -120.01250 1892–1903 / 1927[n 25] Chelan County Public Utility District Raised Lake Chelan HD.11C.081 (14926342072).jpg

See also[edit]

Notes[edit]

  1. ^ Dam was initially completed in 1941; third power plant was begun in 1967 and completed in 1974.[9]
  2. ^ Dam was initially completed in 1937; second powerhouse was completed in 1981
  3. ^ The original dam was completed in 1911. In 1917, the dam was raised 17.5 feet (5.3 m) to increase storage. Later, safety concerns were addressed and the new, modified dam was completed in 1989.[28]
  4. ^ Original dam was completed in 1927. Due to deterioration, a replacement dam was commissioned and completed in 1978.[32]
  5. ^ a b c d e Information received in email exchange with representative from Idaho Power.
  6. ^ Initially completed in 1935, updated in 1995 with diversion structure and two powerhouses[36]
  7. ^ Constructed with two power plants - A & B. Upper Salmon A was completed in 1937, Upper Salmon B, located a mile upriver from A, was completed in 1947.[36]
  8. ^ Initially constructed by Greater Shoshone and Twin Falls Water Power Company in 1910, bought by Idaho Power in 1916 and updated in 1949.[36]
  9. ^ A new power plant was built in the 1990s; this one was decommissioned and turned into a historical display[42][43]
  10. ^ Dam and units one to four completed in 1959, unit five completed in 1980.[45]
  11. ^ Dam and first three powerhouses were completed in 1975. Three further powerhouses, as well as modifications to Lewiston's water intake, were completed in 1987.[52]
  12. ^ Dam was initially completed in 1961 with three generators online. Powerhouse units four through six were later added and online in 1976.[57]
  13. ^ The first Wild Horse Dam was constructed in 1937. After the aggregate was found to be of poor quality, a new concrete, thin arch dam was completed in 1969, doubling the size of the reservoir.[63]
  14. ^ Power plant located at Owyhee Dam.[66]
  15. ^ Power plant located along the Owyhee Tunnel No. 1.[66]
  16. ^ Power plant located along the Mitchell Butte Lateral.[66]
  17. ^ Kootenay Canal Generating Station is located at the end of a canal created by the Corra Linn Dam.
  18. ^ a b Original dam constructed in 1944 created 140 MW; expansion completed in 2007 added 120 MW.[8]
  19. ^ Although these rivers are not one, for the simplification of this list they will be listed together, as they are only separated by Lake Pend Oreille.
  20. ^ This dam is made up of four sections with the highest being 110 ft (34 m) and the other three lower sections being 53 ft (16 m),[144] 38 ft (12 m),[145] and 54 ft (16 m).[146]
  21. ^ A 335 MW[158] upgrade completed in 2015 brought the power generated by this dam up from 450 MW[159] to 785 MW.
  22. ^ All forks of Flathead River are treated as being on main stem, as there is only one dam on any of the forks.
  23. ^ On South Fork of Flathead River
  24. ^ Originally constructed in 1894, upgraded to concrete structure in 1933, with significant upgrades in the 1980s.[199]
  25. ^ Beginning in 1892, dams were constructed at the mouth of Lake Chelan. After two failures, a more robust dam was constructed in 1903, providing electricity to Chelan. The current dam was completed in 1927.[217]

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