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 |
|---|---|---|---|---|---|---|---|
| Linn Grove Milldam | Iowa | Buena Vista | 9 | Low | Not Rated | 1924 | Recreation |
| Mc Cormick Wetland Dam | Iowa | Lucas | 9 | Low | Not Rated | 1999 | Fish and Wildlife Pond |
| Greene County Wetland Dam #1 | Iowa | Greene | 9 | Low | Not Rated | 2006 | Fish and Wildlife Pond |
| Mc Glaughlin Wetland Dam | Iowa | Wright | 9 | Low | Not Rated | 2002 | Fish and Wildlife Pond |
| Klum Lake Dam | Iowa | Louisa | 9 | Low | Not Rated | 1980 | Fish and Wildlife Pond |
| South 6th St Stormwater Detention Basin | Iowa | Marshall | 9 | Low | Not Rated | 1997 | Flood Risk Reduction |
| Lenth Wetland Dam (Upper Pool) | Iowa | Van Buren | 9 | Low | Not Rated | 2000 | Fish and Wildlife Pond |
| Wilson Road Ford | Iowa | Allamakee | 8 | Low | Not Rated | - | Other |
| Vernon Spring Dam | Iowa | Howard | 8 | Low | Not Rated | 1857 | Other |
| Kuhn Dam | Iowa | Guthrie | 8 | Low | Not Rated | 1992 | Recreation |
| Staceyville Dam | Iowa | Mitchell | 8 | Low | Not Rated | 1933 | Recreation |
| Hobbs Dam | Iowa | Lucas | 8 | Low | Not Rated | 2010 | Fire Protection, Stock, Or ... |
| Palisades-Kepler Dam | Iowa | Linn | 8 | Low | Not Rated | 1936 | Recreation |
| Ripperger Dam | Iowa | Lucas | 8 | Low | Not Rated | 2001 | Fish and Wildlife Pond |
| Diamond Lake Dam | Iowa | Dickinson | 8 | Low | Not Rated | 1957 | Recreation |
| Idot Wetland Dam | Iowa | Louisa | 8 | Low | Not Rated | 1994 | Recreation |
| Mullahy Wetland Dam | Iowa | Henry | 8 | Low | Not Rated | 2001 | Fish and Wildlife Pond |
| Terrill/Garst Wetlands Dam | Iowa | Greene | 8 | Low | Not Rated | 1988 | Recreation |
| Il & Ic Dam | Iowa | Jefferson | 8 | Low | Not Rated | 1992 | Recreation |
| Archer Wetland Dam | Iowa | Appanoose | 8 | Low | Not Rated | 1999 | Fire Protection, Stock, Or ... |
| Little Sioux River Bedgrade Control | Iowa | Harrison | 8 | Low | Not Rated | 1985 | Grade Stabilization |
| Decorah Upper Milldam | Iowa | Winneshiek | 8 | Low | Not Rated | 1911 | Recreation |
| Shimon Marsh Dam | Iowa | Pocahontas | 8 | Low | Not Rated | 1990 | Recreation |
| Van Hall Dam | Iowa | Union | 8 | Low | Not Rated | 1995 | Other |
| Jensen Wetland | Iowa | Fremont | 8 | Low | Not Rated | 2002 | Flood Risk Reduction |
| Sedan Wmc Dam C | Iowa | Appanoose | 8 | Low | Not Rated | 2007 | Fish and Wildlife Pond |
| Willow Slough Dam | Iowa | Mills | 8 | Low | Not Rated | 1959 | Recreation |
| Kingfisher Hollow Dam | Iowa | Clinton | 8 | Low | Not Rated | 1974 | Recreation |
| Hoisington Dam | Iowa | Mitchell | 8 | Low | - | 2021 | Flood Risk Reduction |
| Marywood Farms Wetland Dam #2 | Iowa | Warren | 8 | Low | Not Rated | 2007 | Fish and Wildlife Pond |
| Elfrink Wetland Dam #1 | Iowa | Van Buren | 8 | Low | Not Rated | 1994 | Other |
| Black Hawk Marsh Dam | Iowa | Sac | 8 | Low | Not Rated | 1994 | Recreation |
| Cole (South) Dam | Iowa | Van Buren | 8 | Low | Not Rated | 1999 | Fish and Wildlife Pond |
| Goose Lake Wma Dam | Iowa | Clinton | 8 | Low | Not Rated | - | Fish and Wildlife Pond |
| Bailey Carpenter Wrp Dike #2 | Iowa | Polk | 8 | Low | Not Rated | 2008 | Fish and Wildlife Pond |
| Hanlontown Slough Site 3 | Iowa | Worth | 8 | Low | Not Rated | 2000 | Fish and Wildlife Pond |
| Spring Lake Dam | Iowa | Cherokee | 8 | Low | - | - | Recreation |
| Morse Lake Downstream Wetland | Iowa | Wright | 8 | Low | Not Rated | - | Fish and Wildlife Pond |
| Wallace Dam | Iowa | Greene | 8 | Low | - | 2024 | Flood Risk Reduction |
| Mason City-Lehigh Cement Milldam | Iowa | Cerro Gordo | 8 | Low | Not Rated | 1924 | Water Supply |
| Walnut Creek Duck Marsh Dam | Iowa | Ringgold | 8 | Low | Not Rated | 1959 | Recreation |
| Mallard Marsh Dam No 3 | Iowa | Cerro Gordo | 8 | Low | Not Rated | 1967 | Recreation |
| West 32nd St Stormwater - Lower Dam | Iowa | Dubuque | 8 | Significant | Satisfactory | 2009 | Flood Risk Reduction |
| Mallard Marsh Dam No 1 | Iowa | Cerro Gordo | 8 | Low | Not Rated | 1967 | Recreation |
| Fountain View Lake Dam | Iowa | Polk | 8 | Significant | Not Rated | 1993 | Other |
| Fuller Green Valley Wetland Dam | Iowa | Washington | 8 | Low | Not Rated | 1995 | Recreation |
| Cedar Rapids Milldam Iel&P | Iowa | Linn | 8 | Low | Not Rated | 1967 | Water Supply |
| Union Hill Wpa Dam | Iowa | Cerro Gordo | 8 | Low | Not Rated | 1997 | Recreation |
| South Ridge Estates - West Dam | Iowa | Sioux | 8 | Significant | Not Rated | 2007 | Flood Risk Reduction |
| Otranto Dam | Iowa | Mitchell | 7 | Low | Not Rated | 1902 | 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.