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 |
|---|---|---|---|---|---|---|---|
| Brown Dam | Iowa | Union | 30 | Low | Not Rated | 1978 | Fire Protection, Stock, Or ... |
| Black Dam | Iowa | Lucas | 30 | Low | Not Rated | 1976 | Fire Protection, Stock, Or ... |
| Lucas County Roadgrade Dam 30-72-20 | Iowa | Lucas | 30 | Low | Not Rated | 1983 | Other |
| James Dam | Iowa | Warren | 30 | Low | Not Rated | 1979 | Fire Protection, Stock, Or ... |
| Turkey Cr Watershed Site 10-58 | Iowa | Cass | 30 | Low | Not Rated | 1972 | Fire Protection, Stock, Or ... |
| Twelve Mile Creek Watershed Site 35-2 | Iowa | Union | 30 | Low | Not Rated | 1986 | Fire Protection, Stock, Or ... |
| Nicholson Dam | Iowa | Taylor | 30 | Low | Not Rated | 1991 | Fire Protection, Stock, Or ... |
| Schneller Dam | Iowa | Crawford | 30 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Peterson Dam | Iowa | Woodbury | 30 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Kamerick Road Structure | Iowa | Monroe | 30 | Low | Not Rated | 2001 | Grade Stabilization |
| Blockton Watershed Site E-1 | Iowa | Taylor | 30 | Low | Not Rated | 1973 | Fire Protection, Stock, Or ... |
| Troublesome Cr Watershed Site 50-2 | Iowa | Audubon | 30 | Low | Not Rated | 1979 | Fire Protection, Stock, Or ... |
| Barber Hollow Subwtrshed Site 5-H-3865 | Iowa | Monona | 30 | Low | Not Rated | 1967 | Fire Protection, Stock, Or ... |
| Mc Call Subwatershed Site M-3 | Iowa | Monona | 30 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Timberman Dam | Iowa | Pottawattamie | 30 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Chickering Dam | Iowa | Davis | 30 | Low | Not Rated | 1996 | Fire Protection, Stock, Or ... |
| Courcier Dam | Iowa | Montgomery | 30 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Nyswonger Dam | Iowa | Warren | 30 | Low | Not Rated | 1970 | Fire Protection, Stock, Or ... |
| Soap Creek Watershed Site 68-32 | Iowa | Monroe | 30 | Low | Not Rated | 2007 | Flood Risk Reduction |
| Lawson Subwatershed Site 3-1 | Iowa | Monona | 30 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Simon Run Watershed Site 5-2 | Iowa | Pottawattamie | 30 | Low | Not Rated | 1976 | Fire Protection, Stock, Or ... |
| Willow Creek Subwatershed Site M-3 | Iowa | Woodbury | 30 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Helmers Dam | Iowa | Osceola | 30 | Low | Not Rated | 1974 | Fire Protection, Stock, Or ... |
| Crawford Dam | Iowa | Henry | 30 | Low | Not Rated | 1981 | Fire Protection, Stock, Or ... |
| Wenger Subwatershed M 130+73 | Iowa | Woodbury | 30 | Low | Not Rated | 1965 | Fire Protection, Stock, Or ... |
| Norlin Dam | Iowa | Jones | 30 | Low | Not Rated | 2000 | Fire Protection, Stock, Or ... |
| Loch Burns Dam | Iowa | Wapello | 30 | Low | Fair | 1963 | Recreation |
| Grote Dam | Iowa | Harrison | 30 | Low | Not Rated | 1974 | Fire Protection, Stock, Or ... |
| Iowa Noname39 | Iowa | Pottawattamie | 30 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Pony Creek Watershed Site 7 | Iowa | Mills | 30 | Low | Not Rated | 1965 | Fire Protection, Stock, Or ... |
| Parson Pond Dam | Iowa | Louisa | 30 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Ganzhorn Dam | Iowa | Harrison | 30 | Low | Not Rated | 1970 | Fire Protection, Stock, Or ... |
| Earl Anderson Dam | Iowa | Dallas | 30 | Low | Satisfactory | 1996 | Fire Protection, Stock, Or ... |
| Nilan Dam | Iowa | Pottawattamie | 30 | Low | Not Rated | 1962 | Fire Protection, Stock, Or ... |
| Hoffman Dam | Iowa | Dubuque | 30 | Low | — | 2022 | Flood Risk Reduction |
| Moulton Watershed Site A-3 | Iowa | Appanoose | 30 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Ford Dam | Iowa | Warren | 30 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Atwell Dam | Iowa | Lucas | 30 | Low | Not Rated | 1997 | Fire Protection, Stock, Or ... |
| Gentleman Dam | Iowa | Appanoose | 30 | Low | Not Rated | 1987 | Fire Protection, Stock, Or ... |
| Homepond Dam | Iowa | Decatur | 30 | Significant | Fair | 1920 | Water Supply |
| Larkin Dam | Iowa | Story | 30 | Low | Not Rated | 1965 | Fire Protection, Stock, Or ... |
| Wolf Creek Subwatershed Site M-2 | Iowa | Woodbury | 30 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Henningsgaard Dam | Iowa | Winneshiek | 30 | Low | Not Rated | 2002 | Fire Protection, Stock, Or ... |
| Tug Creek Roadgrade - East Dam | Iowa | Van Buren | 30 | Low | Not Rated | 1990 | Other |
| Blockton Watershed Site S-9 | Iowa | Taylor | 30 | Low | Not Rated | 1973 | Fire Protection, Stock, Or ... |
| Jefferson Park Watershed Site 10 | Iowa | Wapello | 30 | High | Satisfactory | 1983 | Flood Risk Reduction |
| Moulton Watershed Site B-8 | Iowa | Appanoose | 30 | Low | Not Rated | 1962 | Fire Protection, Stock, Or ... |
| Duer Dam | Iowa | Monroe | 30 | Low | Not Rated | 2000 | Grade Stabilization |
| Little River Watershed Site 51-1 | Iowa | Decatur | 30 | Significant | Satisfactory | 2005 | Recreation |
| Stearns Dam | Iowa | Clarke | 30 | Low | Not Rated | 1993 | 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.