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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Mica Dam 240 m (790 ft)[4] 2,805[5]  British Columbia 52°04′39″N 118°33′59″W / 52.07750°N 118.56639°W / 52.07750; -118.56639 (Mica Dam) 1973 BC Hydro Kinbasket Lake
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 (Revelstoke Dam) 1984 BC Hydro Revelstoke Lake
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 (Keenleyside Dam) 1968 BC Hydro Raised Arrow Lakes
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 (Grand Coulee Dam) 1941 / 1974 [n 1] USBR Franklin D. Roosevelt Lake
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 (Chief Joseph Dam) 1955 USACE Rufus Woods Lake
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 (Wells Dam) 1967 Douglas PUD Lake Pateros
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 (Rocky Reach Dam) 1961 Chelan PUD Lake Entiat
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 (Rock Island Dam) 1933[18] Chelan PUD Rock Island Pool
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 (Wanapum Dam) 1963 Grant PUD Lake Wanapum
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 (Priest Rapids Dam) 1961 Grant PUD Priest Rapids Lake
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 (McNary Dam) 1954 USACE Lake Wallula
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 (John Day Dam) 1971 USACE Lake Umatilla
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 (The Dalles Dam) 1957 USACE Lake Celilo
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 (Bonneville Dam) 1937 / 1981 [n 2] USACE Lake Bonneville

Snake River dams

Note: Dams are listed in order from headwater (Two Oceans Plateau, WY) 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 (Jackson Lake Dam) 1911 / 1916 / 1989[n 3] USBR Jackson Lake
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 (Palisades Dam) 1957 USBR Palisades Reservoir
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 (Gem State Dam) 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 (American Falls Dam) 1927 / 1978[n 4] USBR American Falls Reservoir
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 (Minidoka Dam) 1909-1942[34] USBR Lake Walcott
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 (Milner Dam) 1905 Milner Dam, Inc. Milner Lake
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 (Twin Falls Dam) 1935 / 1995[n 6] Idaho Power Company Twin Falls Reservoir[n 5]
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 (Shoshone Falls Dam) 1907[39] Idaho Power Company Shoshone Falls Reservoir
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 (Upper Salmon Falls Dam) 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 (Lower Salmon Falls Dam) 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 (Bliss Dam) 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 (C. J. Strike Dam) 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 (Swan Falls Dam) 1901 Idaho Power Company Swan Falls Reservoir[n 5]
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 (Brownlee Dam) 1959 / 1980[n 10] Idaho Power Company Brownlee Reservoir
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 (Oxbow Dam) 1961 Idaho Power Company Oxbow Reservoir
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 (Hells Canyon Dam) 1967 Idaho Power Company Hells Canyon Reservoir
Lower Granite Dam 181 ft (55 m)[50] 932[51]  Washington 46°39′40″N 117°25′41″W / 46.66111°N 117.42806°W / 46.66111; -117.42806 (Lower Granite Dam) 1975 / 1987 [n 11] USACE Lower Granite Lake
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 (Little Goose Dam) 1970 USACE Lake Bryan
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 (Lower Monumental Dam) 1969 USACE Lake Herbert G. West
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 (Ice Harbor Dam) 1961 / 1976 [n 12] USACE Lake Sacajawea

Salmon River dams

Little Salmon River dams

Note: Dams are listed in order from headwater (north West Mountain, ID) 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 (Goose Lake Dam) 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 (Brundage Dam) 1989 Brundage Reservoir Company Brundage Reservoir

Owyhee River dams

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 (Wild Horse Dam) 1937 / 1969[n 13] BIA[64] Wild Horse Reservoir
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 (Antelope Reservoir Dam) 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 (Owyhee Dam) 1932[66] USBR Lake Owyhee
South Fork Owyhee River dams

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 (Wilson Reservoir Dam) 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 (Bull Run Dam) 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 (Dry Creek Dam) 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 (Rawhide Reservoir Dam) 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 (Sheep Creek Dam) 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 (Chimney Creek Dam) Roaring Springs Associates Desert Ranch Reservoir

Malheur River dams

Note: Dams are listed in order from headwater (Logan Valley, OR) 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°35′07″N 118°12′31″W / 43.58528°N 118.20861°W / 43.58528; -118.20861 (Warm Springs Dam) 1919 United States Bureau of Reclamation Warm Springs Reservoir
Agency Valley Dam (North Fork Malheur River)[74][76] 110 ft (34 m) proposed 2.0[77]  Oregon 43°54′41″N 118°09′15″W / 43.91139°N 118.15417°W / 43.91139; -118.15417 (Agency Valley Dam) 1935 United States Bureau of Reclamation Beulah Reservoir
Harper Diversion Dam[74] 12 ft (3.7 m) 0  Oregon 43°49′29″N 117°38′32″W / 43.82472°N 117.64222°W / 43.82472; -117.64222 (Harper Diversion) 1930 United States Bureau of Reclamation Harper Diversion Pool
Bully Creek Dam (Bully Creek)[74][78] 121 ft (37 m) 0  Oregon 44°00′55″N 117°23′48″W / 44.01528°N 117.39667°W / 44.01528; -117.39667 (Bully Creek Dam) 1963 United States Bureau of Reclamation Bully Creek Reservoir
Bully Creek Diversion Dam (Bully Creek)[74] 4 ft (1.2 m) 0  Oregon 44°00′11″N 117°23′03″W / 44.00306°N 117.38417°W / 44.00306; -117.38417 (Bully Creek Diversion) 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′11″N 117°40′16″W / 44.35306°N 117.67111°W / 44.35306; -117.67111 (Willow Creek Reservoir #3 Dam) 1944 Orchard Water Company Malheur Reservoir

Grande Ronde River dams

Wallowa River dams

Note: Dams are listed in order from headwater (near Pete's Point, Eagle Cap Wilderness, OR) 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 (Wallowa Lake Dam) 1931 Associated Ditch Companies Raised Wallowa Lake

Powder River dams

Note: Dams are listed in order from headwater (confluence of McCully Fork and Cracker Creek, OR) 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 (Mason Dam) 1968 United States Bureau of Reclamation Philips Lake
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 (Thief Valley Dam) 1932 United States Bureau of Reclamation Thief Valley Reservoir

Blackfoot River dams

Note: Dams are listed in order from headwater (confluence of Diamond and Lanes Creeks, ID) 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 (Blackfoot Dam)[86] 1911[86] United States Bureau of Indian Affairs[86] Blackfoot Reservoir

Henrys Fork dams

Note: Dams are listed in order from headwater (Henrys Lake, ID) 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 (Henrys Lake Dam)[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 (Island Park Dam)[88] 1938[88] United States Bureau of Reclamation[33] Island Park Reservoir
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 (Buffalo River Dam) 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 (Ashton Dam)[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 (Chester Dam) 1938 Fremont-Madison Irrigation District Chester Dam Pool
Fall River dams

Note: Dams are listed in order from headwater (Pitchstone Plateau, WY) 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 (Grassy Lake Dam)[94] 1939[94] United States Bureau of Reclamation[33] Grassy Lake

Portneuf River dams

Note: Dams are listed in order from headwater (southeast of Higham Peak, ID) 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 (Portneuf Dam) 1912 Portneuf-Marsh Valley Canal Company Chesterfield Reservoir

Salmon Falls Creek dams

Note: Dams are listed in order from headwater (Jarbidge Mountains, NV) 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 (Salmon Falls Dam) 1911 Salmon River Canal Company, Ltd. Salmon Falls Creek Reservoir
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 (Cedar Creek Dam) 1920 Cedar Mesa Reservoir And Canal Company Cedar Creek Reservoir

Boise River dams

Note: Dams are listed in order from headwater (confluence of North and Middle Forks Boise River, ID) 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 (Arrowrock Dam) 1915 United States Bureau of Reclamation Arrowrock Reservoir
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 (Lucky Peak Dam) 1955 United States Army Corps of Engineers Lucky Peak Lake
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 (Boise River Diversion Dam) 1908 United States Bureau of Reclamation Boise River Diversion Dam Pool
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 (Barber Dam) 1904 Ada County and Fulcrum Inc. Barber Dam Pool
South Fork Boise River dams

Note: Dams are listed in order from headwater (confluence of Ross Fork and Johnson Creek, ID) 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 (Anderson Ranch Dam) 1947 United States Bureau of Reclamation Anderson Ranch Reservoir
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 (Little Camas Dam) 1912 Mountain Home Irrigation District Little Camas Reservoir

Goose Creek dams

Note: Dams are listed in order from headwater (near Monument Peak (ID)) 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 (Oakley Dam) 1916 Oakley Canal Company Lower Goose Creek Reservoir

Weiser River dams

Note: Dams are listed in order from headwater (near Brush Mountain, ID) 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 (Lost Valley Dam) 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 (C Ben Ross Dam) 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 (Crane Creek Dam) 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 (Mann Creek Dam) 1967 United States Bureau of Reclamation Mann Creek Reservoir

Burnt River dams

Note: Dams are listed in order from headwater (confluence of North and South Fork Burnt River, OR) 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 (Unity Dam) 1938 United States Bureau of Reclamation Unity Reservoir

Willow Creek dams

Note: Dams are listed in order from headwater (Blackfoot Mountains, ID) 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 (Ririe Dam)[117] 1977[117] United States Bureau of Reclamation[117] Ririe Reservoir

Payette River dams

Note: Dams are listed in order from headwater (confluence of South and Middle Forks Payette River, ID) 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 (Black Canyon Diversion Dam) 1924 United States Bureau of Reclamation Black Canyon Reservoir
North Fork Payette River dams

Note: Dams are listed in order from headwater (Squaw Meadows, ID) 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 (Upper Payette Lake Dam) 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 (Granite Lake Dam) 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 (Payette Lake Dam) 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 (Little Payette Lake Dam) 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 (Cascade Dam) 1948 United States Bureau of Reclamation Lake Cascade
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 (Sage Hen Dam) 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 (Paddock Valley Dam) 1949 Little Willow Irrigation District Paddock Valley Reservoir
South Fork Payette River dams

Note: Dams are listed in order from headwater (near Parks Peak, ID) 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 (Deadwood Dam) 1931 United States Bureau of Reclamation Deadwood Reservoir

Clearwater River dams

North Fork Clearwater River dams

Note: Dams are listed in order from headwater (near Illinois Peak, ID/MT) 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 (Dworshak Dam) 1973 Army Corps of Engineers Dworshak Reservoir

Malad River dams

Big Wood River dams

Note: Dams are listed in order from headwater (near Galena Summit, ID) 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 (Magic Dam)[128] 1910[128] Magic Reservoir Hydroelectric, Inc.[128] Magic Reservoir
Camas Creek

Note: Dams are listed in order from headwater (near Packer Butte, ID) 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 (Mormon Dam) 1908 Twin Lakes Reservoir and Irrigation Company Mormon Reservoir
Little Wood River dams

Note: Dams are listed in order from headwater (Standhope Peak, ID) 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 (Little Wood Dam)[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 (Fish Creek Dam)[133] 1923[133] Carey Valley Reservoir Company[133] Fish Creek Reservoir

Kootenay River dams

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 (Libby Dam) 1972[136] USACE Lake Koocanusa
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 (Corra Linn Dam) 1932[137] FortisBC raised Kootenay Lake
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 (Upper Bonnington Falls Dam) 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 (Lower Bonnington Falls Dam) 1925[8] FortisBC
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 (South Slocan Dam) 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 (Kootenay Canal Generating Station) 1976[8] BC Hydro
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 (Brilliant Dam) 1944 / 2007[n 18] Columbia Power Corporation

Pend Oreille River / Clark Fork River dams

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 (Thompson Falls Dam) 1915[144] Northwestern Energy Thompson Falls Reservoir
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 (Noxon Rapids Dam) 1959[150] Avista Corp. Noxon Reservoir
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 (Cabinet Gorge Dam) 1952[152] Avista Corp. Cabinet Gorge Reservoir
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 (Albeni Falls Dam) 1955 USACE Raised Lake Pend Oreille 11.5 ft (3.5 m)[153]
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 (Box Canyon Dam) 1956[155] Pend Oreille PUD Box Canyon Reservoir
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 (Boundary Dam) 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 (Seven Mile Dam) 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 (Waneta Dam) 1954[156] Teck Resources

Flathead River dams

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 (Hungry Horse Dam) 1953[162] USBR Hungry Horse Reservoir
Seli’š Ksanka Qlispe’ 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 (Seli’š Ksanka Qlispe’ Dam) 1938[162] [165]CSKT's EKI: Tribal Raised Flathead Lake 10 ft (3.0 m)[162]

Deschutes River dams

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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Crane Prairie Dam 36 ft (11 m)[166] 0  Oregon 43°45′18″N 121°47′6″W / 43.75500°N 121.78500°W / 43.75500; -121.78500 (Crane Prairie Dam) 1940[166] USBR Crane Prairie Reservoir
Wickiup Dam 100 ft (30 m)[166] 0  Oregon 43°41′43″N 121°42′14″W / 43.69528°N 121.70389°W / 43.69528; -121.70389 (Wickiup Dam) 1949[166] USBR Wickiup Reservoir
Round Butte Dam[167] 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 (Round Butte Dam)[168] 1964 Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon Lake Billy Chinook
Pelton Dam[167] 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 (Pelton Dam)[169] 1957 Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon Lake Simtustus
Pelton Reregulating Dam[167] 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 (Pelton Reregulating Dam)[170] 1958 Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon

Yakima River dams

Note: Dams are listed in order from headwater (Keechelus Lake, WA) 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)[171] 0[172]  Washington 47°19′20″N 121°20′22″W / 47.32222°N 121.33944°W / 47.32222; -121.33944 (Keechelus Dam) 1917[171] USBR Raised Keechelus Lake
Easton Diversion Dam 66 ft (20 m)[173] 0[172]  Washington 47°14′30″N 121°11′17″W / 47.24167°N 121.18806°W / 47.24167; -121.18806 (Easton Diversion Dam) 1929[174] USBR Lake Easton
Unnamed Diversion Dam 0  Washington 47°03′50″N 120°39′09″W / 47.06389°N 120.65250°W / 47.06389; -120.65250 (Unnamed Dam) USBR
Roza Diversion Dam 67 ft (20 m)[175] 12  Washington 46°44′56″N 120°27′56″W / 46.74889°N 120.46556°W / 46.74889; -120.46556 (Roza Dam) 1939[176] USBR
Wapato Dam 19 ft (5.8 m)[177] 0  Washington 46°31′27″N 120°28′37″W / 46.52417°N 120.47694°W / 46.52417; -120.47694 (Wapato Dam) Wapato Reservoir
Sunnyside Dam 8 ft (2.4 m)[171] 0[172]  Washington 46°29′52″N 120°26′41″W / 46.49778°N 120.44472°W / 46.49778; -120.44472 (Sunnyside Dam) 1907[178] Sunnyside Valley Irrigation District
Prosser Dam 9 ft (2.7 m)[179] 0  Washington 46°12′45″N 119°46′22″W / 46.21250°N 119.77278°W / 46.21250; -119.77278 (Prosser Dam) 1904[179] USBR
Wannawish Dam 6.6 ft (2.0 m)[180] 0  Washington 46°22′43″N 119°25′02″W / 46.37861°N 119.41722°W / 46.37861; -119.41722 (Horn Rapids/Wannawish Dam) 1892[180]

Cle Elum River dams

Note: Dams are listed in order from headwaters (near Mount Daniel, WA) 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)[171] 0[172]  Washington 47°14′49″N 121°4′23″W / 47.24694°N 121.07306°W / 47.24694; -121.07306 (Cle Elum Dam) 1933[171] USBR Raised Cle Elum Lake

Kachess River dams

Note: Dams are listed in order from headwaters (Three Queens, WA) 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)[171] 0[172]  Washington 47°15′53″N 121°12′9″W / 47.26472°N 121.20250°W / 47.26472; -121.20250 (Kachess Dam) 1912[171] USBR Raised Kachess Lake

Naches River dams

Bumping River dams

Note: Dams are listed in order from headwaters (near Crag Mountain, WA) 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)[171] 0[172]  Washington 46°52′16″N 121°17′58″W / 46.87111°N 121.29944°W / 46.87111; -121.29944 (Bumping Lake Dam) 1910[171] USBR Raised Bumping Lake
Tieton River dams

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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Clear Creek Dam (North Fork Tieton) 83 ft (25 m)[171] 0[172]  Washington 46°37′40″N 121°16′15″W / 46.62778°N 121.27083°W / 46.62778; -121.27083 (Clear Lake Dam) 1915[171] USBR Clear Lake
Tieton Dam 319 ft (97 m)[171] 0[172]  Washington 46°39′26″N 121°7′41″W / 46.65722°N 121.12806°W / 46.65722; -121.12806 (Tieton Dam) 1925[171] USBR Rimrock Lake

Willamette River dams

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Willamette Falls Dam 20 ft (6.1 m)[181] 15.18[182]  Oregon 45°21′11″N 122°37′04″W / 45.35306°N 122.61778°W / 45.35306; -122.61778 (Willamette Falls Dam) 1888[18] Portland General Electric

Santiam River dams

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Big Cliff Dam (North Santiam)[183] 191 ft (58 m) 18  Oregon 44°45′03″N 122°16′59″W / 44.75083°N 122.28306°W / 44.75083; -122.28306 (Big Cliff Dam) 1953 Army Corps of Engineers Big Cliff Reservoir (reregulation for Detroit Reservoir)
Detroit Dam(North Santiam[183] 463 ft (141 m) 100  Oregon 44°43′18″N 122°15′01″W / 44.72167°N 122.25028°W / 44.72167; -122.25028 (Detroit Dam) 1953 Army Corps of Engineers Detoit Reservoir
Foster Dam (South Santiam)[184] 126 ft (38 m) 20  Oregon 44°24′55″N 122°40′13″W / 44.41528°N 122.67028°W / 44.41528; -122.67028 (Foster Dam) 1968 Army Corps of Engineers Foster Reservoir (reregulation for Green Peter Reservoir)
Green Peter Dam (South Santiam)[184] 327 ft (100 m) 80  Oregon 44°27′00″N 122°32′57″W / 44.45000°N 122.54917°W / 44.45000; -122.54917 (Green Peter Dam) 1968 Army Corps of Engineers Green Peter Reservoir

Middle Fork Willamette River dams

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)[185] 30[185]  Oregon 43°42′33″N 122°25′26″W / 43.70917°N 122.42389°W / 43.70917; -122.42389 (Hills Creek Dam) 1961[185] USACE Hills Creek Reservoir
Lookout Point Dam 276 ft (84 m)[186] 150[186]  Oregon 43°54′48″N 122°45′09″W / 43.91333°N 122.75250°W / 43.91333; -122.75250 (Lookout Point Dam) 1954[186] USACE Lookout Point Lake
Fall Creek Dam[187] 180 ft (55 m) 0  Oregon 43°54′49″N 122°45′25″W / 43.91361°N 122.75694°W / 43.91361; -122.75694 (Fall Creek Dam) 1966 Army Corps of Engineers Fall Creek Reservoir
Dexter Dam 93 ft (28 m)[186] 15[186]  Oregon 43°55′22″N 122°48′23″W / 43.92278°N 122.80639°W / 43.92278; -122.80639 (Dexter Dam) 1954[186] USACE Dexter Reservoir

McKenzie River dams

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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Carmen Diversion Dam 17 ft (5.2 m)[188] 0[189]  Oregon 44°20′19″N 122°00′11″W / 44.33861°N 122.00306°W / 44.33861; -122.00306 (Carmen Diversion Dam) 1963[190] Eugene Water & Electric Board Carmen Reservoir
Trail Bridge Dam 90 ft (27 m)[191] 10[189]  Oregon 44°16′24″N 122°03′02″W / 44.27333°N 122.05056°W / 44.27333; -122.05056 (Trail Bridge Dam) 1963[190] Eugene Water & Electric Board Trail Bridge Reservoir
Smith Dam (Smith River) 250 ft (76 m)[192] 104.5[189]  Oregon 44°0′0″N 122°06′36″W / 44.00000°N 122.11000°W / 44.00000; -122.11000 (Smith Dam)[192] 1963[190] Eugene Water & Electric Board Smith Reservoir
Cougar Dam (South Fork)[193] 425 ft (130 m) 25  Oregon 44°07′44″N 122°14′30″W / 44.12889°N 122.24167°W / 44.12889; -122.24167 (Cougar Dam) 1963 Army Corps of Engineers Cougar Reservoir
Blue River Dam (Blue River)[193] 270 ft (82 m) 0  Oregon 44°10′23″N 122°19′47″W / 44.17306°N 122.32972°W / 44.17306; -122.32972 (Blue River Dam) 1969 Army Corps of Engineers Blue River Reservoir
Leaburg Dam 20 ft (6.1 m)[194] 15.9[195]  Oregon 44°08′15″N 122°36′43″W / 44.13750°N 122.61194°W / 44.13750; -122.61194 (Leaburg Dam)[194] 1929[195] Eugene Water & Electric Board Leaburg Reservoir
Walterville Dam 24 ft (7.3 m)[196] 9[195]  Oregon 44°03′36″N 122°49′48″W / 44.06000°N 122.83000°W / 44.06000; -122.83000 (Walterville Dam)[196] 1911[195] Eugene Water & Electric Board Walterville Reservoir

Coast Fork Willamette River dams

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Cottage Grove Dam 95 ft (29 m)[197] 0  Oregon 43°42′58″N 123°03′03″W / 43.71611°N 123.05083°W / 43.71611; -123.05083 (Cottage Grove Dam) 1942[197] USACE Cottage Grove Lake
Dorena Dam (Row River) 145 ft (44 m)[197] 7.51[198]  Oregon 43°46′48″N 122°57′0″W / 43.78000°N 122.95000°W / 43.78000; -122.95000 (Dorena Dam) 1949[197] USACE Dorena Lake

Spokane River dams

Note: Dams are listed in order from headwater (Lake Coeur d'Alene, ID) 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)[199] 15[199]  Idaho 47°42′31″N 116°57′13″W / 47.70861°N 116.95361°W / 47.70861; -116.95361 (Post Falls Hyrdoelectric Development) 1908[199] Avista Raised Lake Coeur d'Alene
Upriver Dam 17.7[200]  Washington 47°41′09″N 117°19′43″W / 47.68583°N 117.32861°W / 47.68583; -117.32861 (Upright Dam) 1894 / 1933[n 24] City of Spokane Upriver Dam Reservoir
Upper Falls Dam 35 ft (11 m)[201] 10[201]  Washington 47°39′46″N 117°24′55″W / 47.66278°N 117.41528°W / 47.66278; -117.41528 (Upper Falls Dam) 1922[201] Avista Upper Falls Reservoir
Monroe Street Dam 24 ft (7.3 m)[202] 15[202]  Washington 47°39′42″N 117°25′31″W / 47.66167°N 117.42528°W / 47.66167; -117.42528 (Monroe Street Dam) 1890[202] Avista
Nine Mile Dam 58 ft (18 m)[203] 26[203]  Washington 47°46′30″N 117°32′38″W / 47.77500°N 117.54389°W / 47.77500; -117.54389 (Nine Mile Dam) 1908[203] Avista Nine Mile Reservoir
Long Lake Dam 213 ft (65 m)[204] 71[204]  Washington 47°50′14″N 117°50′23″W / 47.83722°N 117.83972°W / 47.83722; -117.83972 (Long Lake Dam) 1915[204] Avista Long Lake
Little Falls Dam 57 ft (17 m)[205] 36[206]  Washington 47°49′57″N 117°55′04″W / 47.83250°N 117.91778°W / 47.83250; -117.91778 (Little Falls Dam) 1911[207] Avista Little Falls Pool

Cowlitz River dams

Note: Dams are listed in order from headwater (confluence of the Ohanapecosh River and the Clear Fork of the Cowlitz River, WA) 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)[208] 70[209]  Washington 46°27′59″N 122°06′33″W / 46.46639°N 122.10917°W / 46.46639; -122.10917 (Cowlitz Falls Dam) 1994[209] Bonneville Power Administration Lake Scanewa
Mossyrock Dam 606 ft (185 m)[210] 300[210]  Washington 46°32′04″N 122°25′29″W / 46.53444°N 122.42472°W / 46.53444; -122.42472 (Mossyrock Dam) 1968[210] Tacoma Public Utilities Riffe Lake
Mayfield Dam 250 ft (76 m)[211] 162[211]  Washington 46°30′10″N 122°35′18″W / 46.50278°N 122.58833°W / 46.50278; -122.58833 (Mayfield Dam) 1963[211] Tacoma Public Utilities Lake Mayfield

Lewis River dams

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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Swift Dam[212] 512 ft (156 m) 240  Washington 46°04′48″N 122°12′36″W / 46.08000°N 122.21000°W / 46.08000; -122.21000 (Swift Dam)[213] 1958 PacifiCorp Swift Reservoir
Swift No. 2 Dam[212] 83 ft (25 m)[214] 70  Washington 46°03′46″N 122°11′52″W / 46.06278°N 122.19778°W / 46.06278; -122.19778 (Swift No. 2 Dam)[214] 1959[214] Public Utility District No. 1 of Cowlitz County
Yale Dam[212] 323 ft (98 m) 134  Washington 45°58′48″N 122°20′24″W / 45.98000°N 122.34000°W / 45.98000; -122.34000 (Yale Dam)[215] 1953 PacifiCorp Yale Lake
Merwin Dam[212] 313 ft (95 m) 136  Washington 45°59′24″N 122°28′48″W / 45.99000°N 122.48000°W / 45.99000; -122.48000 (Merwin Dam)[216] 1931 PacifiCorp Lake Merwin

Wenatchee River dams

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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Tumwater Canyon Dam[217] 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 (Tumwater Canyon Dam) 1909 Chelan County Public Utility District Lake Jolanda

Chelan River dams

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Lake Chelan Dam 40 ft (12 m)[218] 59.2[218]  Washington 47°50′04″N 120°00′45″W / 47.83444°N 120.01250°W / 47.83444; -120.01250 (Lake Chelan Dam) 1892–1903 / 1927[n 25] Chelan County Public Utility District Raised Lake Chelan

See also

Notes

  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. 1 2 3 4 5 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. 1 2 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.[200]
  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.[218]

References

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  2. ↑ Idaho Transportation Department (2005). "Inside the Idaho Transportation Department" (PDF). Retrieved 2015-01-03.
  3. ↑ U.S. Department of Energy (1994). "A Review of the Effects of Dams on the Columbia River Estuarine Environment, with Special Reference to Salmonids" (PDF). Retrieved 2015-01-03.
  4. ↑ Center for the Columbia River History. "Dams of the Columbia Basin & Their Effects on the Native Fishery". Retrieved 2015-01-03.
  5. 1 2 BC Hydro (2014). "Columbia Region". Retrieved 2015-01-03.
  6. ↑ Ministry of Energy, Mines and Natural Gas (2012-12-05). "A Review of the Range of Impacts and Benefits of the Columbia River Treaty on Basin Communities, the Region and the Province" (PDF). Retrieved 2015-01-03.
  7. ↑ BC Hydro (2014). "Hugh Keenleyside Dam". Retrieved 2015-01-03.
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  47. ↑ Columbia Basin Research. "Oxbow Dam - Hydroelectric Project Information". Retrieved 2015-01-03.
  48. ↑ Idaho Power. "Decision Support Systems" (PDF). Retrieved 2015-01-03.
  49. ↑ Columbia Basin Research. "Hells Canyon Dam - Hydroelectric Project Information". Retrieved 2015-01-03.
  50. ↑ United States Army Corps of Engineers. "Lower Granite Lock and Dam". Retrieved 2015-01-03.
  51. ↑ Columbia Basin Research. "Lower Granite Dam - Hydroelectric Project Information". Retrieved 2015-01-03.
  52. ↑ United States Corps of Engineers. "Lower Granite Lock and Dam". Retrieved 2015-01-03.
  53. ↑ United States Army Corps of Engineers. "Little Goose Lock and Dam". Retrieved 2015-01-03.
  54. ↑ Columbia Basin Research. "Little Goose Dam - Hydroelectric Project Information". Retrieved 2015-01-03.
  55. ↑ United States Corps of Engineers. "Lower Monumental Lock and Dam". Retrieved 2015-01-03.
  56. ↑ Columbia Basin Research. "Lower Monumental Dam - Hydroelectric Project Information". Retrieved 2015-01-03.
  57. 1 2 United States Corps of Engineers. "Ice Harbor Lock and Dam". Retrieved 2015-01-03.
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  60. ↑ National Performance of Dams Program (2016). "Brundage Dam". Retrieved 2016-03-10.
  61. ↑ National Performance of Dams Program (2016). "Wild Horse". Retrieved 2016-03-12.
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  66. 1 2 3 4 5 United States Bureau of Reclamation (2013-01-03). "Owyhee Project". Retrieved 2016-03-12.
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  68. ↑ National Performance of Dams Program (2016). "Bull Run Dam". Retrieved 2016-03-10.
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  70. ↑ National Performance of Dams Program (2016). "Rawhide Res". Retrieved 2016-03-10.
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  87. 1 2 3 4 National Performance of Dams Program (2016). "Henry's Lake". Retrieved 2016-03-08.
  88. 1 2 3 National Performance of Dams Program (2016). "Island Park". Retrieved 2016-03-08.
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  96. ↑ National Performance of Dams Program (2016). "Salmon Falls". Retrieved 2016-03-10.
  97. ↑ National Performance of Dams Program (2016). "Cedar Creek". Retrieved 2016-03-10.
  98. ↑ National Performance of Dams Program (2016). "Arrowrock". Retrieved 2016-03-10.
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  200. 1 2 Spokane Public Works and Utilities. "Upriver Dam". Retrieved 2015-01-11.
  201. 1 2 3 Avista. "Upper Falls Hydroelectric Development". Retrieved 2015-01-11.
  202. 1 2 3 Avista. "Monroe Street Hydroelectrical Development". Retrieved 2015-01-11.
  203. 1 2 3 Avista. "Nine Mile Hydroelectric Development". Retrieved 2015-01-11.
  204. 1 2 3 Avista. "Long Lake Hydroelectric Development". Retrieved 2015-01-11.
  205. ↑ Avista Corporation (July 2005). "Spokane River Hydroelectric Project" (PDF). Retrieved 2015-01-11.
  206. ↑ Avista. "Little Falls Discharge". Retrieved 2015-01-11.
  207. ↑ Northwest Council (2008-10-31). "Spokane River". Retrieved 2015-01-11.
  208. ↑ Lewis County PUD (2013). "Cowlitz Falls Project". Retrieved 2015-01-11.
  209. 1 2 Moody’s Investor Service (2013-05-30). "Moody’s assigns Aa1 rating to BPA backed Cowlitz Falls Hydro debt" (PDF). Retrieved 2015-01-11.
  210. 1 2 3 Tacoma Public Utilities. "Mossyrock Dam". Retrieved 2015-01-11.
  211. 1 2 3 Tacoma Public Utilities. "Mayfield Dam". Retrieved 2015-01-11.
  212. 1 2 3 4 PacifiCorp (2016). "Lewis River". Retrieved 2016-03-03.
  213. ↑ National Performance of Dams Program (2016). "Swift No. 1". Retrieved 2016-03-03.
  214. 1 2 3 National Performance of Dams Program (2016). "Swift No. 2 Hydroelectric Project". Retrieved 2016-03-03.
  215. ↑ National Performance of Dams Program (2016). "Yale". Retrieved 2016-03-03.
  216. ↑ National Performance of Dams Program (2016). "Merwin". Retrieved 2016-03-03.
  217. ↑ Washington State Department of Transportation (May 2008). "Preliminary Tumwater Canyon Reach Analysis of Wenatchee River and US2, Milepost 94 to 98" (PDF). Retrieved 2016-03-03.
  218. 1 2 3 Hydropower Reform Coalition (2009). "Hydropower Reform Coalition Success Story" (PDF). Retrieved 2015-01-12.
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