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Browse Dams

4,128 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 4,128 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.

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Name State County Height (ft) Hazard Condition Year Purpose
Red Rock Dam Iowa Marion 142 High Not Available 1969 Flood Risk Reduction
Coralville Dam Iowa Johnson 132 High Not Available 1958 Flood Risk Reduction
Saylorville Dam Iowa Polk 125 High Not Available 1975 Flood Risk Reduction
County Basin Dam Iowa Guthrie 104 Significant Satisfactory 2006
Brushy Creek Dam Iowa Webster 100 High Satisfactory 1998 Recreation
Rathbun Dam Iowa Appanoose 100 High Not Available 1969 Flood Risk Reduction
Big Creek Terminal Dam Iowa Polk 95 Low Not Available 1972 Flood Risk Reduction
Gibson South - Dredge Spoil Disposal Iowa Guthrie 95 Significant Satisfactory 1999 Other
Big Creek Barrier Dam Iowa Polk 84 High Not Available 1974 Flood Risk Reduction
Des Moines County Roadgrade Dam 18-70-2 Iowa Des Moines 84 Low Not Rated 1987 Irrigation
North Pigeon Cr Watershed Site 11-1 Iowa Pottawattamie 81 Low Not Rated 1978 Fire Protection, Stock, Or ...
Big Creek Diversion Dam Iowa Polk 80 High Not Available 1970 Flood Risk Reduction
Maffitt Reservoir Dam Iowa Dallas 79 High Satisfactory 1944 Water Supply
Pony Creek Watershed Site 21 Iowa Mills 75 High Satisfactory 1971 Flood Risk Reduction
Lost Grove Lake Iowa Scott 75 High Satisfactory 2012 Recreation
Pleasant Creek Lake Dam Iowa Linn 73 High Satisfactory 1977 Flood Risk Reduction
Waubonsie Cr. Watershed Site 11-1 Iowa Mills 71 Significant Satisfactory 1977 Flood Risk Reduction
Lake Panorama Dam Iowa Guthrie 70 Significant Satisfactory 1969 Recreation
Waubonsie Cr. Watershed Site 3-8 Iowa Mills 69 Significant Satisfactory 1989 Fire Protection, Stock, Or ...
Viking Lake Dam Iowa Montgomery 69 Significant Fair 1957 Recreation
Bacon Creek Watershed Site A-3 Iowa Woodbury 69 High Satisfactory 1978 Flood Risk Reduction
Pattison Dam Iowa Clayton 68 Low Satisfactory 2008 Other
Horse Lake Dam Iowa Plymouth 67 Significant Satisfactory 1963 Fire Protection, Stock, Or ...
Croy Subwatershed Site M-10500 Iowa Monona 67 Low Not Rated 1952 Fire Protection, Stock, Or ...
Sun Valley Lake Dam Iowa Ringgold 67 Significant Satisfactory 1971 Other
Iris Lake Dam Iowa Fayette 66 Low Satisfactory 2004 Fire Protection, Stock, Or ...
Waubonsie Cr. Watershed Site 3-11 Iowa Mills 66 Low Not Rated 1989 Fire Protection, Stock, Or ...
Twelve Mile Creek Watershed Site M-1 Iowa Union 66 High Satisfactory 1983 Flood Risk Reduction
Harrison County Roadgrade Dam 18-79-43 Iowa Harrison 66 Significant Fair 1959 Other
North Pigeon Cr Watershed Site 17 Iowa Pottawattamie 66 Low Not Rated 1973 Fire Protection, Stock, Or ...
West Beaver Subwatershed Sta 23+45 #A Iowa Monona 65 Low Not Rated 1961 Fire Protection, Stock, Or ...
North Pigeon Cr Watershed Site 15 Iowa Pottawattamie 65 Low Not Rated 1978 Fire Protection, Stock, Or ...
Indian Creek Watershed Site 2 Iowa Pottawattamie 65 High Satisfactory 1975 Flood Risk Reduction
Mathes Iowa Des Moines 64 Low Poor 1941 Recreation
Upper Beaver Subwatershed Site 6-1 Iowa Monona 64 Low Not Rated 1967 Fire Protection, Stock, Or ...
North Pigeon Cr Watershed Site 13 Iowa Pottawattamie 64 Low Not Rated 1978 Fire Protection, Stock, Or ...
Bacon Creek Watershed Site A-2 Iowa Woodbury 64 Low Not Rated 1978 Flood Risk Reduction
Smokey Hollow Subwatershed Site 4 Iowa Woodbury 64 High Poor 1985 Flood Risk Reduction
Pony Creek Watershed Site 23 Iowa Mills 64 Low Not Rated 1964 Fire Protection, Stock, Or ...
Iowa Noname86 Iowa Fremont 63 Low Not Rated 1976 Other
Three Mile Reservoir Dam Iowa Union 63 Significant Satisfactory 1995 Flood Risk Reduction
Indian Creek Watershed Site 12 Iowa Pottawattamie 63 Low Not Rated 1975 Fire Protection, Stock, Or ...
Doran Dam Iowa Boone 63 Low Not Rated 1971 Fire Protection, Stock, Or ...
Boustead/Coenen/Pryor Dam Iowa Harrison 62 Low Not Rated 1965 Fire Protection, Stock, Or ...
Pony Creek Watershed Site 8a Iowa Mills 62 Low Not Rated 1966 Fire Protection, Stock, Or ...
North Pigeon Cr Watershed Site M-1 Iowa Pottawattamie 62 Significant Satisfactory 1993 Flood Risk Reduction
Pony Creek Watershed Site 17 Iowa Mills 62 Low Satisfactory 1965 Fire Protection, Stock, Or ...
Little River Watershed Site M-1 Iowa Decatur 61 High Satisfactory 1984 Flood Risk Reduction
Mill Picayune Watershed Site M-2-1 Iowa Harrison 61 Low Not Rated 1967 Fire Protection, Stock, Or ...
Zaiser Dam Iowa Des Moines 61 High Satisfactory 2010 Recreation

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.