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 |
|---|---|---|---|---|---|---|---|
| Mill Picayune Watershed Site P-6 | Iowa | Shelby | 45 | Low | Not Rated | 1985 | Other |
| Willow Creek Subwatershed Site M-1 | Iowa | Woodbury | 45 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Woodbury County Roadgrade Dam 18-87-44 | Iowa | Woodbury | 44 | Low | Not Rated | 1988 | Other |
| Reed Subwatershed Sta 46+80 #3 | Iowa | Monona | 44 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Dane Ridge Watershed Site B-3 | Iowa | Crawford | 44 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Ledgewood Creek Watershed Site 9-4 | Iowa | Fremont | 44 | Low | Not Rated | 1973 | Fire Protection, Stock, Or ... |
| Little Egypt Subwatershed 5-3052 | Iowa | Woodbury | 44 | Low | Not Rated | 1960 | Fire Protection, Stock, Or ... |
| Swine Graphics #1 | Iowa | Clarke | 44 | Low | Not Rated | 2000 | Water Supply |
| Held Watershed Site B-6 | Iowa | Plymouth | 44 | Low | Not Rated | 1965 | Fire Protection, Stock, Or ... |
| Nass Dam | Iowa | Monona | 44 | Low | Not Rated | 1999 | Fire Protection, Stock, Or ... |
| West Beaver Subwatershed Sta 33+30 | Iowa | Monona | 44 | Low | Not Rated | 1961 | Fire Protection, Stock, Or ... |
| Madison County Roadgrade Dam 14-76-26 | Iowa | Madison | 44 | Low | Not Rated | 1996 | Fire Protection, Stock, Or ... |
| Marion County Roadgrade Dam 35-77-21 | Iowa | Marion | 44 | Low | Not Rated | 1971 | Other |
| Arnold-Armstrong Subwtrshd Sta27+80 #26 | Iowa | Monona | 44 | Low | Not Rated | 1961 | Fire Protection, Stock, Or ... |
| Fehseke Dam | Iowa | Lee | 44 | Low | Not Rated | 1999 | Fire Protection, Stock, Or ... |
| Camp Creek Subwatershed Site M-4 | Iowa | Woodbury | 44 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Moore Subwatershed Site M-10180 | Iowa | Monona | 44 | Low | Not Rated | 1955 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site M-16-6 | Iowa | Shelby | 44 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Mc Donald Subwatershed 4-2557 | Iowa | Woodbury | 44 | Low | Not Rated | 1960 | Fire Protection, Stock, Or ... |
| Iowa Noname11 | Iowa | Decatur | 44 | Low | Not Rated | 1969 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site P-57-1 | Iowa | Shelby | 44 | Low | Not Rated | 1975 | Fire Protection, Stock, Or ... |
| Mississippi River Lock and Dam 13 | Iowa | Whiteside | 44 | Significant | Not Available | 1939 | Navigation |
| Hanigan Dam | Iowa | Monona | 44 | Low | Not Rated | 2001 | Fire Protection, Stock, Or ... |
| Waubonsie Cr. Watershed Site 3-1-1 | Iowa | Fremont | 44 | Low | Not Rated | 1984 | Fire Protection, Stock, Or ... |
| Dane Ridge Watershed Site D-3-1 | Iowa | Crawford | 44 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Langenfeld - Heiden Dam | Iowa | Crawford | 44 | Low | Not Rated | 2000 | Grade Stabilization |
| South Magnolia Watershed Site Z | Iowa | Harrison | 44 | Low | Not Rated | 1958 | Fire Protection, Stock, Or ... |
| Troublesome Cr Watershed Site 38-6 | Iowa | Audubon | 44 | Low | Not Rated | 1984 | Fire Protection, Stock, Or ... |
| Swiss Lake Estates Dam | Iowa | Fayette | 44 | Low | Fair | 1967 | Recreation |
| Beeds Lake Dam | Iowa | Franklin | 44 | High | Satisfactory | 1937 | Recreation |
| Parnell Creek Subwatershed Site 9-1 | Iowa | Woodbury | 44 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Jd LLC Pond | Iowa | Guthrie | 44 | Low | - | 2021 | Fire Protection, Stock, Or ... |
| Lum Hollow Subwatershed M-22453 | Iowa | Woodbury | 44 | Low | Not Rated | 1959 | Fire Protection, Stock, Or ... |
| Dejong Dam | Iowa | Marion | 44 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Grade Lake Dam | Iowa | Clarke | 44 | High | Satisfactory | 1900 | Recreation |
| Mule Creek Watershed Sta 48+87 | Iowa | Mills | 44 | Low | Not Rated | 1955 | Fire Protection, Stock, Or ... |
| Weber Creek Subwatershed Site M-11532 | Iowa | Woodbury | 44 | Low | Not Rated | 1956 | Fire Protection, Stock, Or ... |
| Briggs Woods Lake Dam | Iowa | Hamilton | 44 | Significant | Satisfactory | 1968 | Recreation |
| Bedford Water Supply Dam | Iowa | Taylor | 44 | Significant | Fair | 1969 | Water Supply |
| Hacklebarney Woods Dam | Iowa | Montgomery | 44 | Low | Not Rated | 1969 | Recreation |
| Hieber Dam | Iowa | Monona | 44 | Low | Not Rated | 2000 | Fire Protection, Stock, Or ... |
| Lucas County Roadgrade Dam (L-2) | Iowa | Lucas | 44 | Low | Not Rated | 1989 | Other |
| Mississippi River Lock and Dam 12 | Iowa | Jo Daviess | 44 | Significant | Not Available | 1938 | Navigation |
| Dane Ridge Watershed Site C-4 | Iowa | Crawford | 44 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Held Watershed Site B-2 | Iowa | Plymouth | 43 | Low | Not Rated | 1965 | Fire Protection, Stock, Or ... |
| Big Park Watershed Site D-1 | Iowa | Crawford | 43 | Low | Not Rated | 1960 | Fire Protection, Stock, Or ... |
| Pottawattamie CO Roadgrade Dam 8-76-42 | Iowa | Pottawattamie | 43 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Harmony Creek Watershed Site 1 | Iowa | Harrison | 43 | Low | Not Rated | 1958 | Fire Protection, Stock, Or ... |
| Mosquito of Harrison Watershed Site 5-2 | Iowa | Harrison | 43 | Low | Not Rated | 1988 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site P-3 | Iowa | Shelby | 43 | Low | Not Rated | 1993 | Other |
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.