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 |
|---|---|---|---|---|---|---|---|
| Johnson Dam | Iowa | Davis | 25 | Low | Not Rated | 1990 | Fire Protection, Stock, Or ... |
| Garst Dam | Iowa | Guthrie | 25 | Low | Not Rated | 1977 | Fire Protection, Stock, Or ... |
| Graham Dam | Iowa | Warren | 25 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Barclay Dam | Iowa | Poweshiek | 25 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Dennis Smith Dam | Iowa | Lucas | 25 | Low | - | 2023 | Grade Stabilization |
| Goddard Dam | Iowa | Montgomery | 25 | Low | Not Rated | 2005 | Grade Stabilization |
| Winther Dam | Iowa | Audubon | 25 | Low | Not Rated | 1968 | Fire Protection, Stock, Or ... |
| Mc Broom Dam | Iowa | Clarke | 25 | Low | Not Rated | 1970 | Recreation |
| Mc Donald Dam | Iowa | Van Buren | 25 | Low | Not Rated | 1964 | Fire Protection, Stock, Or ... |
| Volkmar Dam | Iowa | Taylor | 25 | Low | Not Rated | 1970 | Fire Protection, Stock, Or ... |
| Lewis Dam | Iowa | Poweshiek | 25 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Statler Dam | Iowa | Washington | 25 | Low | Not Rated | 1969 | Fire Protection, Stock, Or ... |
| Pioneer Park Pond Dam | Iowa | Page | 25 | Low | Not Rated | 1950 | Recreation |
| Yates Dam | Iowa | Appanoose | 25 | Low | Not Rated | 1972 | Fire Protection, Stock, Or ... |
| Jonbar Ranch Dam | Iowa | Dallas | 25 | Low | Not Rated | 1957 | Fire Protection, Stock, Or ... |
| Split Rock Dam | Iowa | Chickasaw | 25 | Low | Not Rated | 1964 | Recreation |
| Lenz Dam | Iowa | Wayne | 25 | Low | Not Rated | 1974 | Fire Protection, Stock, Or ... |
| Valdez Dam | Iowa | Wayne | 25 | Low | Not Rated | 2002 | Fire Protection, Stock, Or ... |
| Engbers Dam | Iowa | Mahaska | 25 | Low | Not Rated | 1976 | Recreation |
| Milligan Dam | Iowa | Union | 25 | Low | Not Rated | 1973 | Fire Protection, Stock, Or ... |
| Four Corners Dam | Iowa | Carroll | 25 | Low | Not Rated | 1999 | Recreation |
| Gustafson/Harmon Dam | Iowa | Wayne | 25 | Low | Not Rated | 1975 | Fire Protection, Stock, Or ... |
| Adam CO Cons Bd Dam | Iowa | Adams | 25 | Low | Not Rated | 2002 | Fire Protection, Stock, Or ... |
| Badger Lake Dredge Spoil Dam | Iowa | Webster | 25 | Low | Not Rated | 1996 | Debris Control |
| Liken Family Farm Dam | Iowa | Union | 25 | Low | Not Rated | 1986 | Fire Protection, Stock, Or ... |
| Vander Molen Dam | Iowa | Jasper | 25 | Low | Not Rated | 1980 | Fire Protection, Stock, Or ... |
| Old Reservoir Dam | Iowa | Ringgold | 25 | Low | Not Rated | 1920 | Water Supply |
| Mc Combs Dam | Iowa | Taylor | 25 | Low | Not Rated | 1962 | Fire Protection, Stock, Or ... |
| Porter Dam | Iowa | Polk | 25 | Low | Not Rated | 1955 | Recreation |
| White Dam | Iowa | Davis | 25 | Low | Not Rated | 1961 | Fire Protection, Stock, Or ... |
| De Hart Dam | Iowa | Van Buren | 25 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Kincart Farms Dam | Iowa | Davis | 25 | Significant | Not Rated | 1975 | Fire Protection, Stock, Or ... |
| Silver Lake Dam | Iowa | Delaware | 25 | Low | Not Rated | 1948 | Recreation |
| Jsc Farms Dam 1 | Iowa | Dallas | 25 | Low | Not Rated | 1994 | Fire Protection, Stock, Or ... |
| Grubbs Dam | Iowa | Adair | 25 | Low | Not Rated | 2000 | Fire Protection, Stock, Or ... |
| Green Acres Dam | Iowa | Audubon | 25 | Low | Not Rated | 1969 | Fire Protection, Stock, Or ... |
| Simmering Dam | Iowa | Washington | 25 | Low | Not Rated | 1976 | Fire Protection, Stock, Or ... |
| East Lenox Reservoir Dam | Iowa | Adams | 25 | Significant | Satisfactory | 1913 | Water Supply |
| Promise City Reservoir Dam | Iowa | Wayne | 25 | Low | Not Rated | 1900 | Water Supply |
| West Lenox Reservoir Dam | Iowa | Taylor | 25 | Significant | Not Rated | 1913 | Water Supply |
| Yellowsmoke Watershed Site D-2 | Iowa | Crawford | 25 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Lake Keomah Silt Dam | Iowa | Mahaska | 25 | Low | Not Rated | 1938 | Other |
| Greiner/Vogel Dam | Iowa | Washington | 25 | Low | Not Rated | 1965 | Fire Protection, Stock, Or ... |
| Walnut Creek Dam Site 2 | Iowa | Jefferson | 25 | Low | Not Rated | 1995 | Fire Protection, Stock, Or ... |
| Mike Mikkelson Subwatershed M-10210 | Iowa | Monona | 25 | Low | Not Rated | 1960 | Fire Protection, Stock, Or ... |
| Mc Masters Subwatershed 3075 | Iowa | Monona | 25 | Low | Not Rated | 1955 | Fire Protection, Stock, Or ... |
| Shimek Forest Dam 3 | Iowa | Lee | 25 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Mule Creek Watershed Site 2 | Iowa | Mills | 25 | Low | Not Rated | 1953 | Fire Protection, Stock, Or ... |
| Mule Creek Watershed Site 1 | Iowa | Mills | 25 | Low | Not Rated | 1953 | Fire Protection, Stock, Or ... |
| Oaknoll Dam | Iowa | Johnson | 25 | High | Fair | 1994 | 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.