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 169 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

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	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	1984	BC Hydro	Revelstoke Lake
Keenleyside Dam	52 m (171 ft)[7]	185[8]	British Columbia	49°20′18″N 117°46′18″W	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	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	1955	USACE	Rufus Woods Lake
Wells Dam	160 ft (49 m)[12]	840[13]	Washington	47°56′50″N 119°51′51″W	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	1961	Chelan PUD	Lake Entiat
Rock Island Dam	135 ft (41 m)[16]	660[17]	Washington	47°20′33″N 120°05′40″W	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	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	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	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	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	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	1937 / 1981 [n 2]	USACE	Lake Bonneville

Snake River dams

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	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	1957	USBR	Palisades Reservoir
Gem State Dam	40 ft (12 m)	22.6[30]	Idaho	43°25′19″N 112°06′08″W	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	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	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	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	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	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	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	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	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	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	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	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	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	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	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	1970	USACE	Lake Bryan
Lower Monumental Dam	152 ft (46 m)[54]	930[55]	Washington	46°33′48″N 118°32′20″W	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	1961 / 1976 [n 12]	USACE	Lake Sacajawea

Salmon River dams

Little Salmon River dams

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	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	1989	Brundage Reservoir Company	Brundage Reservoir

Owyhee River dams

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	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	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	1932[65]	USBR	Lake Owyhee

South Fork Owyhee River dams

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		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		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		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		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	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		Roaring Springs Associates	Desert Ranch Reservoir

Malheur River dams

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	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	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	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	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	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	1944	Orchard Water Company	Malheur Reservoir

Grande Ronde River dams

Wallowa River dams

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	1931	Associated Ditch Companies	Raised Wallowa Lake

Powder River dams

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	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	1932	United States Bureau of Reclamation	Thief Valley Reservoir

Blackfoot River dams

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[85]	1911[85]	United States Bureau of Indian Affairs[85]	Blackfoot Reservoir

Henrys Fork dams

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[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[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	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[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	1938	Fremont-Madison Irrigation District	Chester Dam Pool

Fall River dams

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[93]	1939[93]	United States Bureau of Reclamation[32]	Grassy Lake

Portneuf River dams

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	1912	Portneuf-Marsh Valley Canal Company	Chesterfield Reservoir

Salmon Falls Creek dams

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	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	1920	Cedar Mesa Reservoir And Canal Company	Cedar Creek Reservoir

Boise River dams

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	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	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	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	1904	Ada County and Fulcrum Inc.	Barber Dam Pool

South Fork Boise River dams

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	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	1912	Mountain Home Irrigation District	Little Camas Reservoir

Goose Creek dams

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	1916	Oakley Canal Company	Lower Goose Creek Reservoir

Weiser River dams

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	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	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	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	1967	United States Bureau of Reclamation	Mann Creek Reservoir

Burnt River dams

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	1938	United States Bureau of Reclamation	Unity Reservoir

Willow Creek dams

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[116]	1977[116]	United States Bureau of Reclamation[116]	Ririe Reservoir

Payette River dams

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	1924	United States Bureau of Reclamation	Black Canyon Reservoir

North Fork Payette River dams

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	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	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	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	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	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	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	1949	Little Willow Irrigation District	Paddock Valley Reservoir

South Fork Payette River dams

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	1931	United States Bureau of Reclamation	Deadwood Reservoir

Clearwater River dams

North Fork Clearwater River dams

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	1973	Army Corps of Engineers	Dworshak Reservoir

Malad River dams

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	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	1911[128]	Idaho Power Company	Malad Gorge State Park

Big Wood River dams

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[129]	1910[129]	Magic Reservoir Hydroelectric, Inc.[129]	Magic Reservoir

Camas Creek

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	1908	Twin Lakes Reservoir and Irrigation Company	Mormon Reservoir

Little Wood River dams

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[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[134]	1923[134]	Carey Valley Reservoir Company[134]	Fish Creek Reservoir

Kootenay River dams

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	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	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	1907[8]	FortisBC
Lower Bonnington Falls Dam	21 m (69 ft)[140]	25[8]	British Columbia	49°27′39″N 117°29′59″W	1925[8]	FortisBC
South Slocan Dam	18 m (59 ft)[141]	57[8]	British Columbia	49°27′20″N 117°31′11″W	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	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	1944 / 2007[n 18]	Columbia Power Corporation

Bull River dams

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	1922 (rebuilt 1953)	BC Hydro	Aberfeldie Dam Pool

Elk River dams

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	1924	BC Hydro	Elko Dam Pool

Duncan River dams

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	1967	BC Hydro	raised Duncan Lake

Mark Creek dams

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	1994	City of Kimberley	Mark Creek Dam Reservoir

Pend Oreille River / Clark Fork River dams

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	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	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	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	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	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	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	1979[164]	BC Hydro
Waneta Dam	75.9 m (249 ft)[163]	450[165]	British Columbia	49°00′14″N 117°36′42″W	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	2015[166]	FortisBC

Flathead River dams

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	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	1938[169]	Energy Keepers, Inc.[172]	Raised Flathead Lake 10 ft (3.0 m)[169]

Deschutes River dams

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	1940[173]	USBR	Crane Prairie Reservoir
Wickiup Dam	100 ft (30 m)[173]	0	Oregon	43°41′43″N 121°42′14″W	1949[173]	USBR	Wickiup Reservoir
Round Butte Dam[174]	440 ft (130 m)	247.12	Oregon	44°36′0″N 121°16′12″W[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[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[177]	1958	Portland General Electric Company, Confederated Tribes of the Warm Springs Reservation of Oregon

Yakima River dams

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	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	1929[181]	USBR	Lake Easton
Unnamed Diversion Dam		0	Washington	47°03′50″N 120°39′09″W		USBR
Roza Diversion Dam	67 ft (20 m)[182]	12	Washington	46°44′56″N 120°27′56″W	1939[183]	USBR
Wapato Dam	19 ft (5.8 m)[184]	0	Washington	46°31′27″N 120°28′37″W			Wapato Reservoir
Sunnyside Dam	8 ft (2.4 m)[178]	0[179]	Washington	46°29′52″N 120°26′41″W	1907[185]	Sunnyside Valley Irrigation District
Prosser Dam	9 ft (2.7 m)[186]	0	Washington	46°12′45″N 119°46′22″W	1904[186]	USBR
Wannawish Dam	6.6 ft (2.0 m)[187]	0	Washington	46°22′43″N 119°25′02″W	1892[187]

Cle Elum River dams

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	1933[178]	USBR	Raised Cle Elum Lake

Kachess River dams

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	1912[178]	USBR	Raised Kachess Lake

Naches River dams

Bumping River dams

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	1910[178]	USBR	Raised Bumping Lake

Tieton River dams

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	1915[178]	USBR	Clear Lake
Tieton Dam	319 ft (97 m)[178]	0[179]	Washington	46°39′26″N 121°7′41″W	1925[178]	USBR	Rimrock Lake

Willamette River dams

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	1888[18]	Portland General Electric

Santiam River dams

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	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	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	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	1968	Army Corps of Engineers	Foster Reservoir (reregulation for Green Peter Reservoir)

Middle Fork Willamette River dams

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	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	1954[193]	USACE	Lookout Point Lake
Fall Creek Dam[194]	180 ft (55 m)	0	Oregon	43°54′49″N 122°45′25″W	1966	USACE	Fall Creek Reservoir
Dexter Dam	93 ft (28 m)[193]	15[193]	Oregon	43°55′22″N 122°48′23″W	1954[193]	USACE	Dexter Reservoir

McKenzie River dams

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	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	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[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	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	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[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[203]	1911[202]	Eugene Water & Electric Board	Walterville Reservoir

Coast Fork Willamette River dams

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	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	1949[204]	USACE	Dorena Lake

Spokane River dams

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	1908[206]	Avista	Raised Lake Coeur d'Alene
Upriver Dam		17.7[207]	Washington	47°41′09″N 117°19′43″W	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	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	1890[209]	Avista
Nine Mile Dam	58 ft (18 m)[210]	26[210]	Washington	47°46′30″N 117°32′38″W	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	1915[211]	Avista	Long Lake
Little Falls Dam	57 ft (17 m)[212]	36[213]	Washington	47°49′57″N 117°55′04″W	1911[214]	Avista	Little Falls Pool

Cowlitz River dams

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	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	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	1963[218]	Tacoma Public Utilities	Lake Mayfield	Mayfield Dam

Lewis River dams

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[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[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[222]	1953	PacifiCorp	Yale Lake
Merwin Dam[219]	313 ft (95 m)	136	Washington	45°59′24″N 122°28′48″W[223]	1931	PacifiCorp	Lake Merwin

Spillimacheen River dams

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	1955[225]	BC Hydro	Spillimacheen Dam Pool

Wenatchee River dams

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	1909	Chelan County Public Utility District	Lake Jolanda

Chelan River dams

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	1892–1903 / 1927[n 24]	Chelan County Public Utility District	Raised Lake Chelan

See also

• United States portal
• Canada portal
• Water portal
• Renewable energy portal

• List of lakes in Washington (state)
• List of tallest dams in the world
• Dams in the Colorado River system
• List of reservoirs and dams in the United States
• Columbia River Treaty (US–Canadian treaty regulating hydroelectric development)

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.^[31]
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^[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. 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]