Browse Dams

1,316 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 1,316 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
Asylum Reservoir Dam #6 Connecticut Middlesex 28 Significant Fair 1954 Water Supply
Pinewood Lake Dam Connecticut Fairfield 28 High Satisfactory 1890 Recreation
Columbia Lake Dam Connecticut Tolland 28 High Poor 1865 Recreation
Walnut Hill Pond Dam Connecticut Fairfield 27 Significant Fair 1962 Recreation
Highland Lake Dam Connecticut Litchfield 27 High Fair 1860 Recreation
Hanover Reservoir Dam Connecticut New London 27 High Fair 1900 Recreation
Merimere Reservoir Dike Connecticut New Haven 27 High Fair 1870 Water Supply
Case Brothers Lower Pond Dam Connecticut Hartford 27 Significant Poor 1870 Recreation
Shenipsit Lake Dam Connecticut Tolland 27 High Satisfactory 1903 Water Supply
Risdon Pond Dam Connecticut New Haven 27 Significant Unsatisfactory 1890 Water Supply
Southington Reservoir #3 Dam Connecticut Hartford 26 High Satisfactory - Water Supply
Williams Pond Dam Connecticut New London 26 Significant Satisfactory 1865 Recreation
Seymour Reservoir #1 Dam Connecticut New Haven 26 Significant Fair 1898 Water Supply
Glasgo Pond Dam Connecticut New London 26 High Satisfactory 1860 Recreation
Halchek Pond Dam Connecticut Tolland 26 Significant Fair 1972 Recreation
Ymca Camp Farnam Pond Dam Connecticut Middlesex 26 Significant Fair 1931 Recreation
Dobsonville Pond Dam Connecticut Tolland 26 Significant Fair 1900 Recreation
Oxoboxo Lake Dam Connecticut New London 26 High Satisfactory 1810 Recreation
Black Pond Dam Connecticut New Haven 26 High Fair 1880 Recreation
Rugg Brook Reservoir Northeast Dike Connecticut Litchfield 26 Significant Satisfactory - Water Supply
Shelton Canal Dike Connecticut Fairfield 25 Low Satisfactory 1870 Hydroelectric
Shadow Lake Dam Connecticut Fairfield 25 Significant Fair 1937 Recreation
Lower Kohanza Lake Dam Connecticut Fairfield 25 High Satisfactory 1860 Water Supply
Blue Hills Flood Control Site #2 Dam Connecticut Hartford 25 High Satisfactory 1964 Flood Risk Reduction
Kensington Dam Connecticut Hartford 25 High Satisfactory 1901 Recreation
Stevens Mill Pond Dam Connecticut Hartford 25 Significant Not Rated 1954 Other
Hanover Pond Connecticut New Haven 25 High Satisfactory 2006 Hydroelectric
Johnson Millpond Dam Connecticut Middlesex 25 Significant Satisfactory 1880 Recreation
Leesville Dam Connecticut Middlesex 25 High Satisfactory 1900 Recreation
Batterson Park Pond Dam Connecticut Hartford 25 High Satisfactory 1878 Recreation
North Grosvenordale Dam Connecticut Windham 25 High Poor 1900 Recreation
Ville Pond Dam Connecticut Fairfield 25 Significant Satisfactory - Recreation
Powers Lake Dam Connecticut New London 25 Significant Poor 1870 Recreation
Lake Housatonic (Derby Dam) Connecticut New Haven 25 High Satisfactory 1870 Hydroelectric
Avery Flood Control Site #2 Dam Connecticut Hartford 25 High Satisfactory 1993 Flood Risk Reduction
Straitsville Reservoir Dam Connecticut New Haven 25 Significant Fair 1900 Water Supply
Bristol Reservoir #1 Dam Connecticut Hartford 25 High Satisfactory 1885 Water Supply
Ashland Pond Dam Connecticut New London 25 High Satisfactory 1800 Recreation
Mansfield Recreation Pond Connecticut Tolland 25 Significant Satisfactory 1974 Recreation
Aldon Mill Pond Dam Connecticut Tolland 25 Significant Satisfactory 1920 Recreation
Hartford Reservoir #5 Dam Connecticut Hartford 24 High Fair 1884 Water Supply
Baldwins Pond Dam Connecticut New Haven 24 Significant Satisfactory 1850 Recreation
Lake Winnemaug Dam Connecticut Litchfield 24 High Satisfactory 1920 Recreation
Bulls Bridge Dam Connecticut Litchfield 24 Low Satisfactory 1902 Hydroelectric
Cargill Falls Dam Connecticut Windham 24 Significant Satisfactory 1925 Hydroelectric
Werner Woods Pond Dam Connecticut Hartford 24 Significant Satisfactory 1963 Recreation
Grupes Reservoir Dam Connecticut Fairfield 24 High Poor 1871 Water Supply
Isinglass Reservoir Dam Connecticut Fairfield 24 Significant Fair - Water Supply
Drobney Dam Connecticut Tolland 24 Significant Satisfactory 1970 Recreation
Popes Pond Dam Connecticut Fairfield 24 High Satisfactory 1965 Water Supply

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.