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List of dams in the Missouri River watershed facts for kids

Kids Encyclopedia Facts

The Missouri River is a very long river in the United States. It's like a giant highway for water, flowing into the even bigger Mississippi River. Along the Missouri River and its many smaller rivers (called tributaries), there are thousands of dams. These dams are like big walls built across a river. They create lakes, also known as reservoirs, behind them.

There are about 17,200 dams and reservoirs in the Missouri River basin. Most of these are small and help farmers water their crops. The lakes created by these dams can hold a huge amount of water, about 141 million acre-feet. That's a lot of water! Dams are important for many reasons, like controlling floods, providing water for homes and farms, and even making electricity.

Missouri River basin map
Map showing the Missouri River basin
Garrison Dam aerial
Garrison Dam, which forms Lake Sakakawea, the largest reservoir on the Missouri River

Dams on the Main Missouri River

These are the biggest dams built directly on the Missouri River itself. The table below shows important details about each one. You can see how tall they are, how much water their lakes can hold, and how much electricity they can make.

Name State Reservoir Height Storage capacity Capacity
(MW)
ft m acre.ft km3
Toston Dam MT 56 17 3,000 0.004 10
Canyon Ferry Dam MT Canyon Ferry Lake 225 69 1,973,000 2.434 50
Hauser Dam MT Hauser Lake 80 24 98,000 0.121 19
Holter Dam MT Holter Lake 124 38 243,000 0.300 48
Black Eagle Dam MT Long Pool 13 4 2,000 0.002 21
Rainbow Dam MT 29 9 1,000 0.001 36
Cochrane Dam MT 59 18 3,000 0.004 64
Ryan Dam MT 61 19 5,000 0.006 60
Morony Dam MT 59 18 3,000 0.004 48
Fort Peck Dam MT Fort Peck Lake 250 76 18,690,000 23.053 185
Garrison Dam ND Lake Sakakawea 210 64 23,800,000 29.356 515
Oahe Dam SD Lake Oahe 245 75 23,500,000 28.986 786
Big Bend Dam SD Lake Sharpe 95 29 1,910,000 2.356 493
Fort Randall Dam SD Lake Francis Case 165 50 5,700,000 7.031 320
Gavins Point Dam NE
SD
Lewis and Clark Lake 74 23 492,000 0.607 132

Dams on Tributary Rivers

Tributary rivers are smaller rivers or streams that flow into a larger river, like the Missouri River. Many important dams are built on these tributary rivers. The table below lists the tributary dams that can hold a lot of water (more than 250,000 acre-feet).

Name State River Reservoir Height Storage capacity Capacity
(MW)
ft m acre.ft km3
Bagnell Dam MO Osage Lake of the Ozarks 148 45 1,927,000 2.377 &&&&&&&&&&&&0215.&&&&&0215
Boysen Dam WY Wind Boysen Reservoir 220 67 952,400 1.175 &&&&&&&&&&&&&015.&&&&&015
Buffalo Bill Dam WY Shoshone Buffalo Bill Reservoir 350 110 623,557 0.769 &&&&&&&&&&&&&030.50000030.5
Chatfield Dam CO South Platte Chatfield Reservoir 147 45 350,000 0.432 &&&&&&&&&&&&&&00.&&&&&00
Clark Canyon Dam MT Jefferson Clark Canyon Reservoir 148 45 325,324 0.401 &&&&&&&&&&&&&&00.&&&&&00
Glendo Dam WY North Platte Glendo Reservoir 190 58 1,170,505 1.444 &&&&&&&&&&&&&038.&&&&&038
Harry S. Truman Dam MO Osage Truman Reservoir 126 38 5,408,600 6.671 &&&&&&&&&&&&0160.&&&&&0160
Hebgen Dam MT Madison Hebgen Lake 85 26 325,000 0.401 &&&&&&&&&&&&&&00.&&&&&00
Keyhole Dam WY Belle Fourche Keyhole Reservoir 168 51 334,200 0.412 &&&&&&&&&&&&&&00.&&&&&00
Kingsley Dam NE North Platte Lake McConaughy 162 49 1,740,000 2.146 &&&&&&&&&&&&&051.90000051.9
Melvern Dam KS Marais des Cygnes Melvern Reservoir 125 38 355,300 0.438 &&&&&&&&&&&&&&00.&&&&&00
Milford Dam KS Republican Milford Lake 90 27 1,125,200 1.387 &&&&&&&&&&&&&&00.&&&&&00
Pathfinder Dam WY North Platte Pathfinder Reservoir 214 65 1,016,500 1.254 &&&&&&&&&&&&&066.80000066.8
Perry Dam KS Delaware Perry Lake 151 46 1,417,700 1.749 &&&&&&&&&&&&&&00.&&&&&00
Pomme de Terre Dam MO Pomme de Terre Pomme de Terre Lake 155 47 650,000 0.802 &&&&&&&&&&&&&&00.&&&&&00
Seminoe Dam WY North Platte Seminoe Reservoir 295 90 1,017,279 1.255 &&&&&&&&&&&&&045.&&&&&045
Stockton Dam MO Sac Stockton Lake 131 40 1,674,000 2.065 &&&&&&&&&&&&&052.&&&&&052
Tiber Dam MT Marias Lake Elwell 211 64 1,515,000 1.869 &&&&&&&&&&&&&010.&&&&&010
Tuttle Creek Dam KS Big Blue Tuttle Creek Lake 137 42 3,185,700 3.929 &&&&&&&&&&&&&&00.&&&&&00
Wilson Dam KS Saline Wilson Lake 130 40 736,000 0.908 &&&&&&&&&&&&&&00.&&&&&00
Yellowtail Dam MT Bighorn Bighorn Lake 525 160 1,381,189 1.704 &&&&&&&&&&&&0250.&&&&&0250

See Also

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