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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
Reagan Lake Montana Glacier 37 Low — 1967 Irrigation
Reser Dam Montana Blaine 37 Low Unsatisfactory 1980 Recreation
Whiton #2 Montana Powder River 37 Low — 1942 Fire Protection, Stock, Or ...
O'Lot O'Farmin' Montana Liberty 37 Low — 1960 Fire Protection, Stock, Or ...
Morris #1 (Toole) Montana Toole 37 Low — 1948 Irrigation
Lower Dry Fork Montana Sanders 37 High Fair 1921 Irrigation
Yellow Water Main Dam Montana Petroleum 37 High Fair 1938 Irrigation
Helen B Dent Dam Montana Carter 37 Low Satisfactory —
7-B Reservoir Montana Garfield 36 Low — 1945 Irrigation
Ernest Wallstein Dam Montana Carter 36 Low Poor —
Jappe Montana Chouteau 36 Low — 1956 Irrigation
Elder Elmer Montana Cascade 36 Low — 1953 Irrigation
South Fork Dry Blood Creek Detention Dam Montana Petroleum 36 Low Fair 1963 Flood Risk Reduction
Jawbone Dam #2 Montana Wheatland 36 High Satisfactory 1966 Flood Risk Reduction
Limpke #2 Montana Fergus 36 Low — 1932 Fire Protection, Stock, Or ...
Tomsheck Montana Toole 36 Low — 1954 Irrigation
Crazy Mountain Ranch Montana Park 36 High Satisfactory 1968 Recreation
#5 Dam Montana Big Horn 36 Low — 1980 Other
Twin (Turtle) Dike Montana Lake 36 Undetermined Poor 1932 Recreation
Olie Montana Toole 35 Significant — 1956 Fire Protection, Stock, Or ...
Mcfarland-White Montana Wheatland 35 Significant — 1968 Irrigation
Drag Creek Retention Dam Montana Petroleum 35 Low Fair 1964 Flood Risk Reduction
Aye #1 Montana Powder River 35 Low — 1942 Fire Protection, Stock, Or ...
Pishkun Dike 2 Montana Teton 35 High Not Available 1931 Irrigation
Northern Pacific Reservoir Dam Montana Jefferson 35 High Not Rated 1935 Water Supply
Neiser #1 Montana Sheridan 35 Low — 1936 Irrigation
Eggebrecht Dam Montana Lake 35 Low — 1977 Irrigation
La Ze #1 Montana Carter 35 Low — 1960 Fire Protection, Stock, Or ...
Bass Lake Montana Ravalli 35 High Not Rated 1887 Flood Risk Reduction
Triple Crossing Montana Valley 35 Low — 1961 Flood Risk Reduction
Aldebaran Montana Pondera 35 Significant — 1920 Fire Protection, Stock, Or ...
Benson Montana Beaverhead 35 Low — 1952 Irrigation
Voegele #1 Montana McCone 35 Low — 1955 Other
Twin Forks (Dawson) Montana Dawson 35 Low — 1961 Flood Risk Reduction
Jawbone Dam #1 Montana Wheatland 35 High Satisfactory 1966 Flood Risk Reduction
Moes Montana Chouteau 35 Low — 1964 Fire Protection, Stock, Or ...
Draco Montana Judith Basin 35 Low — 1950 Fire Protection, Stock, Or ...
Deep Can Montana Teton 35 Low — 1935 Irrigation
Rough Creek Dam Montana Rosebud 35 Low — 1960 Irrigation
Berrys Land #3 Montana McCone 35 Low — 1961 Fire Protection, Stock, Or ...
Primrose Montana Sheridan 35 Low — 1941 Fire Protection, Stock, Or ...
Neuman Dam Montana Cascade 35 Low — 1956 Irrigation
Clem-Reid #1 Montana Carter 35 Low — 1957 Fire Protection, Stock, Or ...
Ruins Detention Dam Montana Valley 35 Low Poor 1965 Fire Protection, Stock, Or ...
Barrett, J. Dam Montana Beaverhead 35 Low — 1962 Irrigation
Praire Goat Dam Montana Dawson 35 Low Poor —
Hook #62 Montana Rosebud 35 Low — 1960 Fire Protection, Stock, Or ...
Cracker Montana Pondera 35 Significant — 1915 Fire Protection, Stock, Or ...
Little Sleeping Child Creek Dam Montana Ravalli 35 High Satisfactory 1927 Recreation
Big Mac #1 Montana Garfield 35 Low — 1947 Fire Protection, Stock, Or ...

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.