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List of dams in the Columbia River watershed

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 many tens of gigawatts of power.

Dams of the Columbia River Basin. Click to view higher resolution and read legend.
Hydroelectric generators in the basin sized by capacity. 17 dams on the British Columbia side of Canada-US border not shown.

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.

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Main stem Columbia River dams

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Dams are listed in order from headwater (Columbia Lake, BC) to mouth (Pacific Ocean, OR/WA).

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

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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] 0   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)[29] 176.6[29]   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[30]   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)[31] 112.4[32]   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)[33] 28.5[33]   Idaho 42°40′10″N 113°29′03″W / 42.66944°N 113.48417°W / 42.66944; -113.48417 (Minidoka Dam) 1909-1942[33] USBR Lake Walcott  
Milner Dam 38 ft (12 m)[34] 59.5[35]   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[36]   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)[37] 64[38]   Idaho 42°35′47″N 114°24′04″W / 42.59639°N 114.40111°W / 42.59639; -114.40111 (Shoshone Falls Dam) 1907[38] Idaho Power Company Shoshone Falls Reservoir  
Upper Salmon Falls Dam 18 ft (5.5 m)[n 5] 34.5[35]   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)[39] 60[35]   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)[39] 75[35]   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[40]   Idaho 42°56′51″N 115°58′31″W / 42.94750°N 115.97528°W / 42.94750; -115.97528 (C. J. Strike Dam) 1952[40] 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)[43] 585[44]   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)[45] 220[46]   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)[47] 450[48]   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)[49] 932[50]   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)[52] 932[53]   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)[54] 930[55]   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)[56] 693[57]   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

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Little Salmon River dams
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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)[58] 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))[59] 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

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Dams are listed in order from headwater (near Double Mountain, NV) 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)[60][61] 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[63] Wild Horse Reservoir  
Antelope Reservoir Dam (Antelope Creek (Jordan Creek))[64] 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)[65] 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[65] USBR Lake Owyhee  
South Fork Owyhee River dams
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Dams are listed in order from headwater (north Tuscarora Mountains, NV) 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)[66] 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)[67] 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)[68] 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)[69] 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)[70] 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)[71] 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

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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[72][73] 106 ft (32 m) proposed 2.7[74]   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)[73][75] 110 ft (34 m) proposed 2.0[76]   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[73] 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)[73][77] 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)[73] 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)[78] 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

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Wallowa River dams
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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[79] 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

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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[80][81] 173 ft (53 m) proposed 3.4[82]   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[81][83] 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

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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)[84] 0   Idaho 43°0′0″N 111°42′36″W / 43.00000°N 111.71000°W / 43.00000; -111.71000 (Blackfoot Dam)[85] 1911[85] United States Bureau of Indian Affairs[85] Blackfoot Reservoir

Henrys Fork dams

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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)[86] 0   Idaho 44°35′24″N 111°21′0″W / 44.59000°N 111.35000°W / 44.59000; -111.35000 (Henrys Lake Dam)[86] 1923[86] North Fork Reservoir Company[86] Raised Henrys Lake
Island Park Dam 94 ft (29 m)[87] 4.8[32]   Idaho 44°25′12″N 111°23′24″W / 44.42000°N 111.39000°W / 44.42000; -111.39000 (Island Park Dam)[87] 1938[87] United States Bureau of Reclamation[32] Island Park Reservoir  
Buffalo River Dam (Buffalo River)[88] 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[89] 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)[90] 1913[90] PacifiCorp Ashton Dam Lake
Chester Dam (Crosscut Diversion Dam)[91] 14.5 ft (4.4 m) 3.3[92]   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
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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)[32] 0   Wyoming 44°07′48″N 110°48′36″W / 44.13000°N 110.81000°W / 44.13000; -110.81000 (Grassy Lake Dam)[93] 1939[93] United States Bureau of Reclamation[32] Grassy Lake  

Portneuf River dams

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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[94] 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

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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[95] 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)[96] 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

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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[97] 350 ft (110 m) 15[98]   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[99] 340 ft (100 m) 101.25[100]   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[101] 68 ft (21 m) 3.3[98]   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[102] 25 ft (7.6 m) 4.14[103]   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
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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[104] 456 ft (139 m) 40[98]   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)[105] 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

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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[106] 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

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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))[107] 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)[108] 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)[109] 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)[110] 148 ft (45 m) 0[111]   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

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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Unity Dam[112][113] 82 ft (25 m) proposed 0.8[114]   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

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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)[115] 0   Idaho 43°34′48″N 111°44′24″W / 43.58000°N 111.74000°W / 43.58000; -111.74000 (Ririe Dam)[116] 1977[116] United States Bureau of Reclamation[116] Ririe Reservoir  

Payette River dams

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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[117] 183 ft (56 m) 10.2[98]   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
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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[118] 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)[119] 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[120] 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)[121] 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[122] 107 ft (33 m) 12.8[98]   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))[123] 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)[124] 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
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Dams are listed in order from headwater (near Vernon Lake, 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)[125] 183 ft (56 m) 0[98]   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

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North Fork Clearwater River dams
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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)[126] 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

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Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Upper Malad River Dam 124.1 ft (37.8 m)[127] 8.27[128]   Idaho 42°51′55″N 114°52′09″W / 42.86539°N 114.86925°W / 42.86539; -114.86925 (Upper Malad Dam) 1948[128] Idaho Power Company Malad Gorge State Park
Lower Malad River Dam 152.0 ft (46.3 m)[127] 13.50[128]   Idaho 42°51′51″N 114°53′08″W / 42.86416°N 114.88566°W / 42.86416; -114.88566 (Upper Malad Dam) 1911[128] Idaho Power Company Malad Gorge State Park
Big Wood River dams
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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)[129] 9[130]   Idaho 43°15′0″N 114°22′12″W / 43.25000°N 114.37000°W / 43.25000; -114.37000 (Magic Dam)[129] 1910[129] Magic Reservoir Hydroelectric, Inc.[129] Magic Reservoir
Camas Creek
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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)[131] 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
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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 River Dam 169 ft (52 m)[132] 3[133]   Idaho 43°25′12″N 114°01′12″W / 43.42000°N 114.02000°W / 43.42000; -114.02000 (Little Wood Dam)[132] 1962[132] United States Bureau of Reclamation[132] Little Wood Reservoir

 

Fish Creek Dam (Fish Creek) 88 ft (27 m)[134] 0   Idaho 43°25′12″N 114°49′48″W / 43.42000°N 114.83000°W / 43.42000; -114.83000 (Fish Creek Dam)[134] 1923[134] Carey Valley Reservoir Company[134] Fish Creek Reservoir

Kootenay River dams

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Dams are listed in order from headwater (near Castle Mountain, Beaverfoot Range, BC) 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)[135] 604[136]   Montana 48°24′37″N 115°18′52″W / 48.41028°N 115.31444°W / 48.41028; -115.31444 (Libby Dam) 1972[137] USACE Lake Koocanusa  
Corra Linn Dam 16 m (52 ft)[138] 51[138]   British Columbia 49°28′04″N 117°28′02″W / 49.46778°N 117.46722°W / 49.46778; -117.46722 (Corra Linn Dam) 1932[138] FortisBC raised Kootenay Lake  
Upper Bonnington Falls Dam 21 m (69 ft)[139] 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)[140] 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)[141] 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)[142] 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)[143] 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  

Bull River dams

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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Aberfeldie Dam[144] 90 ft (27 m) 24[145]   British Columbia 49°29′58″N 115°21′3″W / 49.49944°N 115.35083°W / 49.49944; -115.35083 (Aberfeldie Dam) 1922 (rebuilt 1953) BC Hydro Aberfeldie Dam Pool

Elk River dams

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Dams are listed in order from headwater (Upper Elk Lake) to mouth (Kootenay River, BC).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Elko Dam[146] 52 ft (16 m) 12[147]   British Columbia 49°17′24″N 115°6′16″W / 49.29000°N 115.10444°W / 49.29000; -115.10444 (Elko Dam) 1924 BC Hydro Elko Dam Pool

Duncan River dams

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Dams are listed in order from headwater (near Mount Dawson) to mouth (Kootenay River, BC).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Duncan Dam[148] 130 ft (40 m) 0   British Columbia 50°15′0″N 116°56′47″W / 50.25000°N 116.94639°W / 50.25000; -116.94639 (Duncan Dam) 1967 BC Hydro raised Duncan Lake  

Mark Creek dams

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Dams are listed in order from headwater (Purcell Mountains) to mouth (Kootenay River, BC).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Upper Mark Creek Dam[149] 21.5 m (71 ft) 0   British Columbia 49°42′36″N 116°2′33″W / 49.71000°N 116.04250°W / 49.71000; -116.04250 (Upper Mark Creek Dam) 1994 City of Kimberley Mark Creek Dam Reservoir

Pend Oreille River / Clark Fork River dams

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Dams are listed in order from headwater of Clark Fork River (Silver Bow Creek, MT) 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)[150][n 20] 94[154]   Montana 47°35′28″N 115°21′03″W / 47.59111°N 115.35083°W / 47.59111; -115.35083 (Thompson Falls Dam) 1915[151] Northwestern Energy Thompson Falls Reservoir  
Noxon Rapids Dam 260 ft (79 m)[155] 527[156]   Montana 47°57′39″N 115°44′01″W / 47.96083°N 115.73361°W / 47.96083; -115.73361 (Noxon Rapids Dam) 1959[157] Avista Corp. Noxon Reservoir  
Cabinet Gorge Dam 208 ft (63 m)[158] 255[159]   Idaho 48°05′08″N 116°03′27″W / 48.08556°N 116.05750°W / 48.08556; -116.05750 (Cabinet Gorge Dam) 1952[159] Avista Corp. Cabinet Gorge Reservoir  
Pend Oreille
Albeni Falls Dam 90 ft (27 m)[155] 42[155]   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)[160]  
Box Canyon Dam 62 ft (19 m)[155] 90[161]   Washington 48°46′49″N 117°24′46″W / 48.78028°N 117.41278°W / 48.78028; -117.41278 (Box Canyon Dam) 1956[162] Pend Oreille PUD Box Canyon Reservoir  
Boundary Dam 340 ft (100 m)[155] 1,040[155]   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)[163] 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[164] BC Hydro
Waneta Dam 75.9 m (249 ft)[163] 450[165]   British Columbia 49°00′14″N 117°36′42″W / 49.00389°N 117.61167°W / 49.00389; -117.61167 (Waneta Dam) 1954[163] BC Hydro, Teck Resources
Waneta Dam Expansion 75.9 m (249 ft)[163] 335   British Columbia 49°00′14″N 117°36′42″W / 49.00389°N 117.61167°W / 49.00389; -117.61167 (Waneta Dam Expansion) 2015[166] FortisBC

Flathead River dams

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Dams are listed in order from headwater (Confluence of North Fork and Middle Fork Flathead River) to mouth (Clark Fork River).[n 21]

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Hungry Horse Dam[n 22] 564 ft (172 m)[167] 428[168]   Montana 48°20′28″N 114°00′47″W / 48.34111°N 114.01306°W / 48.34111; -114.01306 (Hungry Horse Dam) 1953[169] USBR Hungry Horse Reservoir  
Seli’š Ksanka Qlispe’ Dam (Kerr Dam) 205 ft (62 m)[170] 188[171]   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[169] Energy Keepers, Inc.[172] Raised Flathead Lake 10 ft (3.0 m)[169]  

Deschutes River dams

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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)[173] 0   Oregon 43°45′18″N 121°47′6″W / 43.75500°N 121.78500°W / 43.75500; -121.78500 (Crane Prairie Dam) 1940[173] USBR Crane Prairie Reservoir  
Wickiup Dam 100 ft (30 m)[173] 0   Oregon 43°41′43″N 121°42′14″W / 43.69528°N 121.70389°W / 43.69528; -121.70389 (Wickiup Dam) 1949[173] USBR Wickiup Reservoir  
Round Butte Dam[174] 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)[175] 1964 Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon Lake Billy Chinook  
Pelton Dam[174] 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)[176] 1957 Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon Lake Simtustus  
Pelton Reregulating Dam[174] 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)[177] 1958 Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon

Yakima River dams

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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)[178] 0[179]   Washington 47°19′20″N 121°20′22″W / 47.32222°N 121.33944°W / 47.32222; -121.33944 (Keechelus Dam) 1917[178] USBR Raised Keechelus Lake  
Easton Diversion Dam 66 ft (20 m)[180] 0[179]   Washington 47°14′30″N 121°11′17″W / 47.24167°N 121.18806°W / 47.24167; -121.18806 (Easton Diversion Dam) 1929[181] 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)[182] 12   Washington 46°44′56″N 120°27′56″W / 46.74889°N 120.46556°W / 46.74889; -120.46556 (Roza Dam) 1939[183] USBR  
Wapato Dam 19 ft (5.8 m)[184] 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)[178] 0[179]   Washington 46°29′52″N 120°26′41″W / 46.49778°N 120.44472°W / 46.49778; -120.44472 (Sunnyside Dam) 1907[185] Sunnyside Valley Irrigation District  
Prosser Dam 9 ft (2.7 m)[186] 0   Washington 46°12′45″N 119°46′22″W / 46.21250°N 119.77278°W / 46.21250; -119.77278 (Prosser Dam) 1904[186] USBR  
Wannawish Dam 6.6 ft (2.0 m)[187] 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[187]  

Cle Elum River dams

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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)[178] 0[179]   Washington 47°14′49″N 121°4′23″W / 47.24694°N 121.07306°W / 47.24694; -121.07306 (Cle Elum Dam) 1933[178] USBR Raised Cle Elum Lake

 

Kachess River dams

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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)[178] 0[179]   Washington 47°15′53″N 121°12′9″W / 47.26472°N 121.20250°W / 47.26472; -121.20250 (Kachess Dam) 1912[178] USBR Raised Kachess Lake  

Naches River dams

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Bumping River dams
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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)[178] 0[179]   Washington 46°52′16″N 121°17′58″W / 46.87111°N 121.29944°W / 46.87111; -121.29944 (Bumping Lake Dam) 1910[178] USBR Raised Bumping Lake

 

Tieton River dams
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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)[178] 0[179]   Washington 46°37′40″N 121°16′15″W / 46.62778°N 121.27083°W / 46.62778; -121.27083 (Clear Lake Dam) 1915[178] USBR Clear Lake

 

Tieton Dam 319 ft (97 m)[178] 0[179]   Washington 46°39′26″N 121°7′41″W / 46.65722°N 121.12806°W / 46.65722; -121.12806 (Tieton Dam) 1925[178] USBR Rimrock Lake  

Willamette River dams

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Dams are listed in order from headwaters (Confluence of Middle Fork Willamette River and Coast Fork Willamette River, OR/WA) to mouth (Columbia River, OR)

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Willamette Falls Dam 20 ft (6.1 m)[188] 15.18[189]   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

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Dams are listed in order from headwaters of each fork (North Santiam and South Santiam rivers) to their mouth at the confluence. There are no dams between the confluence and the mouth of the Santiam (Willamette River, OR).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
North Santiam
Detroit Dam[190] 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 Detroit Reservoir  
Big Cliff Dam[190] 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)  
South Santiam
Green Peter Dam[191] 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

 

Foster Dam[191] 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)  

Middle Fork Willamette River dams

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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Hills Creek Dam 304 ft (93 m)[192] 30[192]   Oregon 43°42′33″N 122°25′26″W / 43.70917°N 122.42389°W / 43.70917; -122.42389 (Hills Creek Dam) 1961[192] USACE Hills Creek Reservoir  
Lookout Point Dam 276 ft (84 m)[193] 150[193]   Oregon 43°54′48″N 122°45′09″W / 43.91333°N 122.75250°W / 43.91333; -122.75250 (Lookout Point Dam) 1954[193] USACE Lookout Point Lake  
Fall Creek Dam[194] 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 USACE Fall Creek Reservoir
Dexter Dam 93 ft (28 m)[193] 15[193]   Oregon 43°55′22″N 122°48′23″W / 43.92278°N 122.80639°W / 43.92278; -122.80639 (Dexter Dam) 1954[193] USACE Dexter Reservoir  

McKenzie River dams

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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)[195] 0[196]   Oregon 44°20′19″N 122°00′11″W / 44.33861°N 122.00306°W / 44.33861; -122.00306 (Carmen Diversion Dam) 1963[197] Eugene Water & Electric Board Carmen Reservoir
Trail Bridge Dam 90 ft (27 m)[198] 10[196]   Oregon 44°16′24″N 122°03′02″W / 44.27333°N 122.05056°W / 44.27333; -122.05056 (Trail Bridge Dam) 1963[197] Eugene Water & Electric Board Trail Bridge Reservoir
Smith Dam (Smith River) 250 ft (76 m)[199] 104.5[196]   Oregon 44°0′0″N 122°06′36″W / 44.00000°N 122.11000°W / 44.00000; -122.11000 (Smith Dam)[199] 1963[197] Eugene Water & Electric Board Smith Reservoir
Cougar Dam (South Fork)[200] 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)[200] 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)[201] 15.9[202]   Oregon 44°08′15″N 122°36′43″W / 44.13750°N 122.61194°W / 44.13750; -122.61194 (Leaburg Dam)[201] 1929[202] Eugene Water & Electric Board Leaburg Reservoir  
Walterville Dam 24 ft (7.3 m)[203] 9[202]   Oregon 44°03′36″N 122°49′48″W / 44.06000°N 122.83000°W / 44.06000; -122.83000 (Walterville Dam)[203] 1911[202] Eugene Water & Electric Board Walterville Reservoir

Coast Fork Willamette River dams

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Dams are listed in order from headwater (Confluence of Big River and Garoutte Creek, OR) to mouth (Willamette River).

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Cottage Grove Dam 95 ft (29 m)[204] 0   Oregon 43°42′58″N 123°03′03″W / 43.71611°N 123.05083°W / 43.71611; -123.05083 (Cottage Grove Dam) 1942[204] USACE Cottage Grove Lake  
Dorena Dam (Row River) 145 ft (44 m)[204] 7.51[205]   Oregon 43°46′48″N 122°57′0″W / 43.78000°N 122.95000°W / 43.78000; -122.95000 (Dorena Dam) 1949[204] USACE Dorena Lake

Spokane River dams

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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 Dam 64 ft (20 m)[206] 15[206]   Idaho 47°42′31″N 116°57′13″W / 47.70861°N 116.95361°W / 47.70861; -116.95361 (Post Falls Hyrdoelectric Development) 1908[206] Avista Raised Lake Coeur d'Alene

 

Upriver Dam 17.7[207]   Washington 47°41′09″N 117°19′43″W / 47.68583°N 117.32861°W / 47.68583; -117.32861 (Upright Dam) 1894 / 1933[n 23] City of Spokane Upriver Dam Reservoir

 

Upper Falls Dam 35 ft (11 m)[208] 10[208]   Washington 47°39′46″N 117°24′55″W / 47.66278°N 117.41528°W / 47.66278; -117.41528 (Upper Falls Dam) 1922[208] Avista Upper Falls Reservoir

 

Monroe Street Dam 24 ft (7.3 m)[209] 15[209]   Washington 47°39′42″N 117°25′31″W / 47.66167°N 117.42528°W / 47.66167; -117.42528 (Monroe Street Dam) 1890[209] Avista  
Nine Mile Dam 58 ft (18 m)[210] 26[210]   Washington 47°46′30″N 117°32′38″W / 47.77500°N 117.54389°W / 47.77500; -117.54389 (Nine Mile Dam) 1908[210] Avista Nine Mile Reservoir  
Long Lake Dam 213 ft (65 m)[211] 71[211]   Washington 47°50′14″N 117°50′23″W / 47.83722°N 117.83972°W / 47.83722; -117.83972 (Long Lake Dam) 1915[211] Avista Long Lake  
Little Falls Dam 57 ft (17 m)[212] 36[213]   Washington 47°49′57″N 117°55′04″W / 47.83250°N 117.91778°W / 47.83250; -117.91778 (Little Falls Dam) 1911[214] Avista Little Falls Pool  

Cowlitz River dams

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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)[215] 70[216]   Washington 46°27′59″N 122°06′33″W / 46.46639°N 122.10917°W / 46.46639; -122.10917 (Cowlitz Falls Dam) 1994[216] Lewis County Public Utility District Lake Scanewa

 

Mossyrock Dam 606 ft (185 m)[217] 300[217]   Washington 46°32′04″N 122°25′29″W / 46.53444°N 122.42472°W / 46.53444; -122.42472 (Mossyrock Dam) 1968[217] Tacoma Public Utilities Riffe Lake  
Mayfield Dam 250 ft (76 m)[218] 162[218]   Washington 46°30′10″N 122°35′18″W / 46.50278°N 122.58833°W / 46.50278; -122.58833 (Mayfield Dam) 1963[218] Tacoma Public Utilities Lake Mayfield
 
Mayfield Dam

Lewis River dams

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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[219] 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)[220] 1958 PacifiCorp Swift Reservoir
Swift No. 2 Dam[219] 83 ft (25 m)[221] 70   Washington 46°03′46″N 122°11′52″W / 46.06278°N 122.19778°W / 46.06278; -122.19778 (Swift No. 2 Dam)[221] 1959[221] Public Utility District No. 1 of Cowlitz County
Yale Dam[219] 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)[222] 1953 PacifiCorp Yale Lake

 

Merwin Dam[219] 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)[223] 1931 PacifiCorp Lake Merwin

Spillimacheen River dams

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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
Spillimacheen Dam[224] 14.5 m (48 ft) 4   British Columbia 50°53′56″N 116°25′28″W / 50.89889°N 116.42444°W / 50.89889; -116.42444 (Spillimacheen Dam) 1955[225] BC Hydro Spillimacheen Dam Pool

Wenatchee River dams

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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[226] 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

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

Name Height Capacity (MW) Province/State(s) Coordinates Year of completion Owner Reservoir formed Image
Lake Chelan Dam 40 ft (12 m)[227] 59.2[227]   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 24] Chelan County Public Utility District Raised Lake Chelan  

See also

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Notes

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  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.[31]
  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[35]
  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.[35]
  8. ^ Initially constructed by Greater Shoshone and Twin Falls Water Power Company in 1910, bought by Idaho Power in 1916 and updated in 1949.[35]
  9. ^ A new power plant was built in the 1990s; this one was decommissioned and turned into a historical display[41][42]
  10. ^ Dam and units one to four completed in 1959, unit five completed in 1980.[44]
  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.[51]
  12. ^ Dam was initially completed in 1961 with three generators online. Powerhouse units four through six were later added and online in 1976.[56]
  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.[62]
  14. ^ Power plant located at Owyhee Dam.[65]
  15. ^ Power plant located along the Owyhee Tunnel No. 1.[65]
  16. ^ Power plant located along the Mitchell Butte Lateral.[65]
  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),[151] 38 ft (12 m),[152] and 54 ft (16 m).[153]
  21. ^ All forks of Flathead River are treated as being on main stem, as there is only one dam on any of the forks.
  22. ^ On South Fork of Flathead River
  23. ^ Originally constructed in 1894, upgraded to concrete structure in 1933, with significant upgrades in the 1980s.[207]
  24. ^ 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.[227]

References

edit
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  158. ^ Idaho Public Television. "Cabinet Gorge Dam". Archived from the original on May 19, 2016. Retrieved January 9, 2015.
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  162. ^ Foundation for Water & Energy Education. "Box Canyon: Pend Oreille River, WA". Retrieved January 9, 2015.
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  164. ^ Touchstones Nelson: Museum of Art and History (2007). "Seven Mile Dam". Archived from the original on September 26, 2018. Retrieved January 9, 2015.
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  172. ^ "Federal commission OKs 2nd new name for former Kerr Dam". November 10, 2015.
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  184. ^ Department of Ecology (June 1991). "Wapato Dam Hydrologic Analysis" (PDF). Retrieved January 10, 2015.
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  195. ^ National Performance of Dams Program. "Carmen Diversion". Archived from the original on March 7, 2016. Retrieved March 3, 2016.
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