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.
| Name | State | County | Height (ft) | Hazard | Condition | Year | Purpose |
|---|---|---|---|---|---|---|---|
| Bacon Creek Watershed Site H-3-1 | Iowa | Woodbury | 55 | Significant | Satisfactory | 1984 | Flood Risk Reduction |
| Bacon Creek Watershed Site H-1 | Iowa | Woodbury | 54 | Significant | Satisfactory | 1984 | Flood Risk Reduction |
| Parnell Creek Subwatershed Site 8-1 | Iowa | Woodbury | 54 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Held Watershed Site A-1 | Iowa | Plymouth | 54 | Low | Not Rated | 1965 | Fire Protection, Stock, Or ... |
| Upper Beaver Subwatershed Site 15-1 | Iowa | Monona | 54 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Twin Ponies Watershed Site 17a | Iowa | Pottawattamie | 54 | Low | Satisfactory | 1998 | Fire Protection, Stock, Or ... |
| Davis Subwatershed 7-3615 | Iowa | Woodbury | 54 | Low | Not Rated | 1958 | Fire Protection, Stock, Or ... |
| Waubonsie Cr. Watershed Site 23-2 | Iowa | Mills | 54 | Low | Not Rated | 1979 | Fire Protection, Stock, Or ... |
| Pheasant Ridge Dam | Iowa | Dallas | 54 | Significant | Satisfactory | 1972 | Water Supply |
| Indian Creek Watershed Site 26 | Iowa | Pottawattamie | 54 | Low | Not Rated | 1975 | Fire Protection, Stock, Or ... |
| West Sunnyside Watershed Site C-3 | Iowa | Plymouth | 54 | Low | Not Rated | 1973 | Fire Protection, Stock, Or ... |
| Bacon Creek Watershed Site L-1 | Iowa | Plymouth | 53 | Low | Not Rated | 1976 | Flood Risk Reduction |
| Nine Eagles Park Lake Dam | Iowa | Decatur | 53 | Significant | Fair | 1930 | Recreation |
| Phillips Subwatershed Site 3250 | Iowa | Monona | 53 | Low | Not Rated | 1956 | Fire Protection, Stock, Or ... |
| Rodney Subwatershed Site 8-1 | Iowa | Monona | 53 | Low | Not Rated | 1969 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site P-90-1 | Iowa | Shelby | 53 | Low | Not Rated | 1984 | Fire Protection, Stock, Or ... |
| Bacon Creek Watershed Site J-3 | Iowa | Woodbury | 53 | Significant | Satisfactory | 1989 | Flood Risk Reduction |
| Lake Anita Dam | Iowa | Cass | 53 | Significant | Satisfactory | 1970 | Recreation |
| Waubonsie Cr. Watershed Site 36-2 | Iowa | Mills | 53 | Low | Not Rated | 1983 | Fire Protection, Stock, Or ... |
| Indian Creek Watershed Site 39 | Iowa | Pottawattamie | 53 | Low | Not Rated | 1975 | Fire Protection, Stock, Or ... |
| Iowa Noname33 | Iowa | Monona | 53 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Waubonsie Cr. Watershed Site 37-1 | Iowa | Mills | 53 | Low | Not Rated | 1983 | Fire Protection, Stock, Or ... |
| Waubonsie Cr. Watershed Site 23-3 | Iowa | Mills | 53 | Significant | Satisfactory | 1987 | Fire Protection, Stock, Or ... |
| Pony Creek Watershed Site 11 | Iowa | Mills | 53 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Dane Ridge Watershed Site A | Iowa | Crawford | 52 | Low | Not Rated | 1977 | Fire Protection, Stock, Or ... |
| Olson/Mann Dam | Iowa | Monona | 52 | Low | Not Rated | 1959 | Fire Protection, Stock, Or ... |
| Bohlen Dam | Iowa | Des Moines | 52 | Low | Not Rated | 1985 | Fire Protection, Stock, Or ... |
| Leekly Dam | Iowa | Plymouth | 52 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| West Sunnyside Watershed Site C-4 | Iowa | Plymouth | 52 | Low | Not Rated | 1973 | Fire Protection, Stock, Or ... |
| Sunrise Subwatershed Site 6a-1 | Iowa | Woodbury | 52 | Low | Not Rated | 1973 | Fire Protection, Stock, Or ... |
| Davis Subwatershed 19-2044 | Iowa | Woodbury | 52 | Low | Not Rated | 1958 | Fire Protection, Stock, Or ... |
| Olsen Dam | Iowa | Harrison | 52 | Low | Not Rated | 1961 | Fire Protection, Stock, Or ... |
| Scott Basin Dam | Iowa | Guthrie | 52 | Significant | Fair | 2013 | Other |
| Windy Hill Subwatershed Site 5-3 | Iowa | Woodbury | 52 | Low | Not Rated | 1975 | Fire Protection, Stock, Or ... |
| Indian Creek Watershed Site 4 | Iowa | Pottawattamie | 52 | Low | Not Rated | 1965 | Fire Protection, Stock, Or ... |
| Midwest Oilseed Dam #2 | Iowa | Dallas | 52 | Low | Not Rated | 2002 | Fire Protection, Stock, Or ... |
| Gant Creek Watershed Site C-6 | Iowa | Plymouth | 52 | Low | Not Rated | 1974 | Fire Protection, Stock, Or ... |
| Davis-Battle Cr. Watershed Site H-4-1 | Iowa | Monona | 52 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Mosquito of Harrison Watershed Site 5-1 | Iowa | Harrison | 52 | Low | Not Rated | 1985 | Fire Protection, Stock, Or ... |
| Leech Hollow Subwatershed Site C-12 | Iowa | Monona | 52 | Low | Not Rated | 1978 | Fire Protection, Stock, Or ... |
| Greenbriar Dam | Iowa | Dallas | 52 | Significant | Satisfactory | 1972 | Other |
| Upper Beaver Subwatershed Site 20-1 | Iowa | Monona | 51 | Low | Not Rated | 1967 | Fire Protection, Stock, Or ... |
| Waubonsie Cr. Watershed Site 3-5 | Iowa | Mills | 51 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Cipco Silt Dam | Iowa | Guthrie | 51 | Low | Satisfactory | 1986 | Other |
| Mill Picayune Watershed Site P-39-1 | Iowa | Harrison | 51 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Afton Reservoir Dam | Iowa | Union | 51 | Significant | Satisfactory | 1936 | Water Supply |
| Barber Hollow Subwatershed Site 5-1 | Iowa | Monona | 51 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Leech Hollow Subwatershed Site C-5 | Iowa | Monona | 51 | Low | Not Rated | 1978 | Fire Protection, Stock, Or ... |
| Davis-Battle Cr. Watershed Site H-4-4 | Iowa | Monona | 51 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Midwest Oilseeds Dam | Iowa | Dallas | 51 | Low | Not Rated | 2000 | 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.