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 |
|---|---|---|---|---|---|---|---|
| Cowles Dam | Iowa | Decatur | 31 | Low | Not Rated | 1991 | Fire Protection, Stock, Or ... |
| Mike Mikkelson Subwatershed 9-2555 | Iowa | Monona | 31 | Low | Not Rated | 1960 | Fire Protection, Stock, Or ... |
| Johnson Dam | Iowa | Montgomery | 31 | Low | - | 2024 | Grade Stabilization |
| Urban America Development Dam | Iowa | Polk | 31 | Low | Not Rated | 1966 | Recreation |
| Garrett Dam | Iowa | Crawford | 31 | Low | Not Rated | 1967 | Fire Protection, Stock, Or ... |
| Troublesome Cr Watershed Site 10-1 | Iowa | Cass | 31 | Low | Not Rated | 2007 | Flood Risk Reduction |
| Turkey Creek Watershed Site 10-26 | Iowa | Cass | 31 | Low | Not Rated | 2005 | Flood Risk Reduction |
| Johnson Dam | Iowa | Taylor | 31 | Low | Not Rated | 1961 | Fire Protection, Stock, Or ... |
| Badger Creek Watershed Site 48-2 | Iowa | Madison | 31 | Low | Not Rated | 1985 | Fire Protection, Stock, Or ... |
| Gleich Dam | Iowa | Wapello | 31 | Low | Not Rated | 1990 | Fire Protection, Stock, Or ... |
| Weber Creek Subwatershed Site 3-4287 | Iowa | Woodbury | 31 | Low | Not Rated | 1955 | Fire Protection, Stock, Or ... |
| Mill Picayune Watershed Site M-24-15 | Iowa | Shelby | 31 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Twelve Mile Creek Watershed Site 27 | Iowa | Union | 31 | Low | Not Rated | 1986 | Fire Protection, Stock, Or ... |
| Parnell Creek Subwatershed Site 21-2 | Iowa | Woodbury | 31 | Low | Not Rated | 1967 | Fire Protection, Stock, Or ... |
| Montie L Hammond Estate Dam | Iowa | Jasper | 31 | Low | Not Rated | 2014 | Grade Stabilization |
| Arnold-Armstrong Subwtrshd Sta 190+78 | Iowa | Monona | 31 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Woodward Dam | Iowa | Cass | 31 | Low | Not Rated | 1994 | Fire Protection, Stock, Or ... |
| Treynor Farm Supply Dam | Iowa | Pottawattamie | 31 | Low | Not Rated | 2004 | Fire Protection, Stock, Or ... |
| Turkey Cr Watershed Site 42 | Iowa | Cass | 31 | Low | Not Rated | 1974 | Fire Protection, Stock, Or ... |
| Reed Subwatershed Sta 88+35 #2 | Iowa | Monona | 31 | Low | Not Rated | 1966 | Fire Protection, Stock, Or ... |
| Lyon County Roadgrade Dam 10-98-48 | Iowa | Lyon | 31 | Low | Not Rated | 1988 | Other |
| Bee Jay Watershed Site 4 | Iowa | Pottawattamie | 31 | Low | Not Rated | 1977 | Fire Protection, Stock, Or ... |
| Klopping Dam | Iowa | Jasper | 31 | Low | Not Rated | 1961 | Fire Protection, Stock, Or ... |
| Lum Hollow Subwatershed M-8552 | Iowa | Woodbury | 31 | Low | Not Rated | 1959 | Fire Protection, Stock, Or ... |
| Burgher Dam | Iowa | Appanoose | 31 | Low | Not Rated | 1989 | Fire Protection, Stock, Or ... |
| Sloan Dam | Iowa | Davis | 31 | Low | Not Rated | 1975 | Fire Protection, Stock, Or ... |
| Terrill Dam | Iowa | Louisa | 31 | Low | Not Rated | 2000 | Fire Protection, Stock, Or ... |
| Washington CO Road Dam 26-74-9 | Iowa | Washington | 31 | Low | Not Rated | 2005 | Grade Stabilization |
| Scnoenjahn Dam | Iowa | Monona | 31 | Low | Not Rated | 1963 | Fire Protection, Stock, Or ... |
| Lankelma Dam | Iowa | Marion | 31 | Low | Not Rated | 1990 | Fire Protection, Stock, Or ... |
| Mayfield Dam | Iowa | Clarke | 31 | Low | Not Rated | 1997 | Fire Protection, Stock, Or ... |
| Humeston Reservoir Dam | Iowa | Wayne | 31 | Significant | Poor | 1916 | Water Supply |
| Turkey Cr Watershed Site 24-1 | Iowa | Cass | 31 | Significant | Satisfactory | 1990 | Fire Protection, Stock, Or ... |
| Troublesome Cr Watershed Site 41-2 | Iowa | Audubon | 31 | Low | Not Rated | 1978 | Fire Protection, Stock, Or ... |
| Upper Locust Watershed Site L-30 | Iowa | Wayne | 31 | Low | Not Rated | 1999 | Fire Protection, Stock, Or ... |
| East Fork Grand River Watershed Site E-54 | Iowa | Ringgold | 31 | Low | Not Rated | 2006 | Flood Risk Reduction |
| West Wolf Creek Subwatershed Site 30a | Iowa | Woodbury | 31 | Low | Not Rated | 1995 | Fire Protection, Stock, Or ... |
| Hainline Dam | Iowa | Ringgold | 31 | Low | Not Rated | 1996 | Fire Protection, Stock, Or ... |
| Stills Dam | Iowa | Appanoose | 31 | Low | Not Rated | 2007 | Fire Protection, Stock, Or ... |
| Nemitz Dam | Iowa | Crawford | 31 | Low | Not Rated | 1970 | Fire Protection, Stock, Or ... |
| Crooked Creek Watershed Site 7a | Iowa | Audubon | 31 | Low | Not Rated | 1971 | Fire Protection, Stock, Or ... |
| Lundberg Dam | Iowa | Montgomery | 31 | Low | Not Rated | 1967 | Fire Protection, Stock, Or ... |
| C & W Investments | Iowa | Appanoose | 31 | Low | Not Rated | 1985 | Fire Protection, Stock, Or ... |
| Prairie Trail Development - South Dam | Iowa | Polk | 31 | Significant | Not Rated | 2008 | Flood Risk Reduction |
| Ankeny Golf & Country Club Dam | Iowa | Polk | 31 | Low | Not Rated | 1962 | Recreation |
| Copper Creek Lake Dam | Iowa | Polk | 31 | Significant | Satisfactory | 1995 | Irrigation |
| Lum Hollow Subwatershed 9-7697 | Iowa | Woodbury | 31 | Low | Not Rated | 1959 | Fire Protection, Stock, Or ... |
| Skubal Dam | Iowa | Washington | 31 | Low | Not Rated | 1975 | Fire Protection, Stock, Or ... |
| Mosquito of Harrison B | Iowa | Harrison | 31 | Low | Not Rated | 1987 | Fire Protection, Stock, Or ... |
| Iowa Noname100 | Iowa | Madison | 31 | Low | Not Rated | 1991 | 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.