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 |
|---|---|---|---|---|---|---|---|
| Walling Subwatershed Sta 57+84 #1b | Iowa | Woodbury | 51 | Low | Not Rated | 1953 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site M-24-4 | Iowa | Shelby | 51 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site S-10-1 | Iowa | Harrison | 51 | Low | Not Rated | 1962 | Fire Protection, Stock, Or ... |
| Waubonsie Cr. Watershed Site 3-5 | Iowa | Mills | 51 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Waubonsie Cr. Watershed Site 3-2 | Iowa | Mills | 51 | Low | Not Rated | 1993 | Fire Protection, Stock, Or ... |
| Bacon Creek Watershed Site A-2-2 | Iowa | Woodbury | 51 | Significant | Fair | 1978 | Flood Risk Reduction |
| Leech Hollow Subwatershed Site C-5 | Iowa | Monona | 51 | Low | Not Rated | 1978 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site P-39-1 | Iowa | Harrison | 51 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Upper Beaver Subwatershed Site 20-1 | Iowa | Monona | 51 | Low | Not Rated | 1967 | Fire Protection, Stock, Or ... |
| North Pigeon Cr Watershed Site M-4 | Iowa | Pottawattamie | 51 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Lake Sundown Dam | Iowa | Appanoose | 51 | Significant | Satisfactory | 1976 | Recreation |
| Mill Picayune Watershed Site P-92-1 | Iowa | Shelby | 51 | Low | Not Rated | 1984 | Fire Protection, Stock, Or ... |
| U-B Subwatershed Site 2-2 | Iowa | Monona | 51 | Low | Not Rated | 1962 | Fire Protection, Stock, Or ... |
| Bacon Creek Watershed Site H-2-2 | Iowa | Woodbury | 51 | Significant | Satisfactory | 1981 | Flood Risk Reduction |
| North Pigeon Cr Watershed Site 16 | Iowa | Pottawattamie | 50 | Low | Not Rated | 1978 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site P-79-2 | Iowa | Shelby | 50 | Low | Not Rated | 1986 | Fire Protection, Stock, Or ... |
| Waubonsie Cr. Watershed Site 31-1 | Iowa | Mills | 50 | Low | Not Rated | 1983 | Fire Protection, Stock, Or ... |
| Iowa Noname36 | Iowa | Plymouth | 50 | Low | Not Rated | 1965 | Fire Protection, Stock, Or ... |
| Bacon Creek Watershed Site J-2 | Iowa | Woodbury | 50 | Low | Not Rated | 1988 | Flood Risk Reduction |
| Holiday Lake Dam | Iowa | Poweshiek | 50 | Significant | Satisfactory | 1962 | Recreation |
| Dane Ridge Watershed Site D-1-3 | Iowa | Crawford | 50 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Lake Pahoja Dam | Iowa | Lyon | 50 | Significant | Satisfactory | 1974 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site M-11-4 | Iowa | Shelby | 50 | Low | Not Rated | 1961 | Fire Protection, Stock, Or ... |
| Waubonsie Cr. Watershed Site 3-6 | Iowa | Mills | 50 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Cedar Creek Dam | Iowa | Madison | 50 | Significant | Satisfactory | 1939 | Water Supply |
| Mike Mikkelson Subwatershed 5-5020 | Iowa | Monona | 50 | Low | Not Rated | 1970 | Fire Protection, Stock, Or ... |
| Camp Klaus Dam | Iowa | Clayton | 50 | Low | Not Rated | 1978 | Recreation |
| Hammer Dam | Iowa | Webster | 50 | Low | Not Rated | 1973 | Fire Protection, Stock, Or ... |
| Phillips Subwatershed Site 5740 | Iowa | Monona | 50 | Low | Not Rated | 1956 | Fire Protection, Stock, Or ... |
| Mosquito of Harrison Watershed Site 7-1 | Iowa | Harrison | 50 | Low | Not Rated | 1993 | Fire Protection, Stock, Or ... |
| Camp Wa Shawtee Dam | Iowa | Fremont | 50 | Low | Not Rated | 1963 | Recreation |
| Lake Ponderosa Dam | Iowa | Poweshiek | 50 | High | Satisfactory | 1969 | Other |
| Mill Picayune Watershed Site M-22-6 | Iowa | Shelby | 50 | Low | Not Rated | 1978 | Fire Protection, Stock, Or ... |
| Iowa Noname87 | Iowa | Fremont | 50 | Low | Not Rated | 1976 | Other |
| Twin Valley Lakes - East Dam | Iowa | Johnson | 50 | Significant | Poor | 1965 | |
| Mill Picayune Watershed Site M-16-4 | Iowa | Shelby | 50 | Low | Not Rated | 1961 | Fire Protection, Stock, Or ... |
| Oak Lake Dam | Iowa | Kossuth | 50 | Significant | Satisfactory | 1971 | Recreation |
| Huff Subwatershed Sta 77+72 #1 | Iowa | Monona | 50 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Walling Subwatershed Sta 55+40 #1 | Iowa | Woodbury | 50 | Low | Not Rated | 1953 | Fire Protection, Stock, Or ... |
| Neustrom Subwatershed Site 9-3 | Iowa | Woodbury | 50 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Stutzman Dam | Iowa | Washington | 50 | Low | Not Rated | 1970 | Fire Protection, Stock, Or ... |
| Lake Sugema Dam | Iowa | Van Buren | 50 | High | Satisfactory | 1992 | Recreation |
| Bacon Creek Watershed Site A-3-1 | Iowa | Woodbury | 50 | High | Satisfactory | 1978 | Flood Risk Reduction |
| Johnson (Oscar) Dam | Iowa | Harrison | 49 | Low | Not Rated | 2011 | Flood Risk Reduction |
| Ryan Henschal Watershed Site E-2 | Iowa | Pottawattamie | 49 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Dane Ridge Watershed Site D-1-4 | Iowa | Crawford | 49 | Low | Not Rated | 1977 | Fire Protection, Stock, Or ... |
| Storm Lake - Northeast Dredge Spoil Disposal Dam | Iowa | Buena Vista | 49 | High | Satisfactory | 2005 | Other |
| Gustafson Lake Dam | Iowa | Buena Vista | 49 | Significant | Not Rated | 1974 | Recreation |
| Eagle Pond Dam | Iowa | Boone | 49 | Low | Not Rated | - | Recreation |
| Natural Milk Dam | Iowa | Shelby | 49 | Low | Not Rated | 2006 | Flood Risk Reduction |
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.