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.

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Name State County Height (ft) Hazard Condition Year Purpose
Fraser Milldam Iowa Boone 7 Low Not Rated 1911 Recreation
Scott Dam Iowa Pocahontas 7 Low Not Rated 1999 Fish and Wildlife Pond
Quasqueton Dam Iowa Buchanan 7 Low Not Rated 1932 Recreation
Waterloo Milldam Iowa Black Hawk 7 Low Satisfactory 1915
Cole Dam Iowa Van Buren 7 Low Not Rated 1999 Fish and Wildlife Pond
Troy Mills Dam Iowa Linn 7 Low Not Rated 1989 Recreation
Cutler Dam Iowa Worth 7 Low Not Rated 1999 Fish and Wildlife Pond
Boone Milldam Iowa Boone 7 Low Not Rated 1932 Water Supply
Keyser Wetland Dam Iowa Carroll 7 Low Not Rated 1995 Other
Van Veldhuizen Dam Iowa Mahaska 7 Low Not Rated 1996 Fish and Wildlife Pond
Rock Rapids Milldam Iowa Lyon 7 Low Not Rated 1931 Water Supply
Lower Dunbar Dam Iowa Greene 7 Low Not Rated 1996 Recreation
Little Sioux Dam Iowa Harrison 7 Low Not Rated 1963 Other
Greenbelt Wetland Dam Iowa Lucas 7 Low Not Rated 1994 Recreation
Elks Club Dam Iowa Floyd 7 Low Satisfactory -
Nelson North Weland Dam Iowa Pocahontas 7 Low Not Rated 2004 Fish and Wildlife Pond
Charles City Beauty Dam Iowa Floyd 7 Low Not Rated 1933 Recreation
Dudycha Wrp #1 Iowa Buena Vista 7 Low Not Rated 2002 Fish and Wildlife Pond
Winkler / Spies Dam Iowa Pocahontas 7 Low Not Rated 1999 Fish and Wildlife Pond
Shell Rock Milldam Iowa Butler 7 Low Not Rated 1928 Recreation
Bechert Dam - Lower Site Iowa Keokuk 7 Low Not Rated 1999 Fish and Wildlife Pond
Des Moines-Waterworks Dam Iowa Polk 7 Low Not Rated 1923 Water Supply
Hawk Investments Dam Iowa Iowa 7 Low Not Rated 1997 Recreation
Center Lake Outlet Control Structure Iowa Dickinson 7 Low Not Rated 2009 Recreation
Goose Lake - South Pond Dam Iowa Clinton 7 Low Not Rated 2004 Fish and Wildlife Pond
Lake Morris Wetland Dam Site 1 Iowa Lucas 7 Low Not Rated 1998 Other
Des Moines-Scott Street Milldam Iowa Polk 7 Low Not Rated 1920 Recreation
Soap Creek Watershed Site 26-37b Iowa Davis 7 Low Not Rated 1997 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.