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Browse Dams

3,029 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 3,029 dams from the NID database. Each record includes dam name, location, physical dimensions, hazard potential classification, condition assessment, purpose, owner information, and emergency action plan status. Use the filters below to search by state, hazard level, condition, or keyword.

Name State County Height (ft) Hazard Condition Year Purpose
Yankee Doodle Tailings Dam Montana Silver Bow 570 High Satisfactory 1972 Other
Hungry Horse Dam Montana Flathead 564 High Not Available 1953 Flood Risk Reduction
Yellowtail Dam Montana Big Horn 525 High Not Available 1966
Libby Dam Montana Lincoln 422 High Not Available 1973 Hydroelectric
Noxon Rapids Montana Sanders 260 High Fair 1960 Hydroelectric
Fort Peck Dam Montana McCone 256 High Not Available 1940 Flood Risk Reduction
Canyon Ferry Dam Montana Lewis and Clark 225 High Not Available 1954 Flood Risk Reduction
Tiber Dam Montana Liberty 211 High Not Available 1956 Flood Risk Reduction
Swift (Pondera) Montana Pondera 205 High Satisfactory 1967 Irrigation
Selis Ksanka Qlispe (Skq) Montana Lake 200 High Fair 1938 Hydroelectric
Gibson Dam Montana Teton 199 High Not Available 1929 Irrigation
Tailings Impoundment Montana Madison 155 Significant — —
Kootenai Dvlpmnt Impoundment Dam Montana Lincoln 151 High Poor 1980 Other
Clark Canyon Dam Montana Beaverhead 148 High Not Available 1964 Flood Risk Reduction
West Fork Bitterroot (Painted Rocks) Montana Ravalli 143 High Poor 1940 Irrigation
Thompson Falls - Intake Dam B Montana Sanders 142 Low Satisfactory 1996 Hydroelectric
Willow Creek Montana Big Horn 136 High Fair 1941 Irrigation
Sun River Diversion Dam Montana Teton 132 High Not Available 1915 Irrigation
Newlan Creek Dam Montana Meagher 131 High Poor 1977 Irrigation
Hubbart Montana Flathead 130 High Poor 1923 Irrigation
Hauser Dam Montana Lewis and Clark 125 High Satisfactory 1911 Hydroelectric
Holter Dam Montana Lewis and Clark 124 High Satisfactory 1918 Hydroelectric
Hebgen Dam Montana Gallatin 120 High Satisfactory 1915 Hydroelectric
Fresno Dam Montana Hill 111 High Not Available 1939 Irrigation
Ruby Dam Montana Madison 111 High Satisfactory 1938 Irrigation
Lake Sherburne Dam Montana Glacier 109 High Not Available 1919 Irrigation
Beaver Creek Reservoir Dam Montana Hill 108 High Fair 1974 Irrigation
Morony Montana Cascade 107 High Satisfactory 1929 Hydroelectric
Bair Montana Meagher 106 High Satisfactory 1939 Irrigation
Cochrane Montana Cascade 105 High Fair 1957 Hydroelectric
Nevada Creek Dam Montana Powell 105 High Satisfactory 1938 Irrigation
Willow Creek Dam Montana Madison 105 High Poor 1938 Irrigation
Bonneau Montana Chouteau 103 High Satisfactory 1940 Irrigation
Cooney Montana Carbon 102 High Poor 1937 Irrigation
Basin Creek Dam #1 Montana Silver Bow 101 High Satisfactory 1897 Water Supply
West Dam Montana Deer Lodge 100 Significant Satisfactory —
Crow Montana Lake 99 High Poor 1933 Irrigation
Mission Montana Lake 98 High Fair 1935 Irrigation
Lower Willow Creek Dam Montana Granite 96 High Poor 1962 Irrigation
Little Blue Dam Montana Sanders 95 Low — 1954 Other
Helena Valley Dam Montana Lewis and Clark 94 High Not Available 1959 Irrigation
East Fork Dam Montana Fergus 93 High Satisfactory 1974 Recreation
Willow Creek BOR MT Dam Montana Lewis and Clark 93 High Not Available 1911 Irrigation
Tongue River Dam Montana Big Horn 93 High Satisfactory 1939 Irrigation
Cedar Creek Montana Flathead 93 High Satisfactory 1971 Water Supply
Martinsdale, North Dam Montana Wheatland 91 High Satisfactory 1939 Irrigation
North Fork of Smith River Dam Montana Meagher 91 High Satisfactory 1936 Irrigation
Colstrip Evaporation Pond Dam Montana Rosebud 88 High Satisfactory 1976 Other
Bullhook Dam Montana Hill 87 High Satisfactory 1955 Flood Risk Reduction
Norwegian Creek Dam Montana Madison 85 Significant — 1958 Irrigation

Frequently Asked Questions

Hazard potential is based on the consequences of dam failure, not the condition of the dam. High hazard means loss of human life is probable. Significant means economic and environmental losses are expected but no probable loss of life. Low means minimal losses are expected. The classification considers downstream population, infrastructure, and environmental resources.

Condition ratings reflect the physical state of the dam based on periodic inspections. Satisfactory means no deficiencies found. Fair means minor issues exist but no immediate action needed. Poor means safety deficiencies require remedial action. Unsatisfactory means the dam is unsafe and immediate corrective action is required.

Yes. Use the search field above to find dams by name. You can also combine the search with state, hazard, and condition filters to narrow your results. Each dam record links to a detail page with complete information.