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Browse Dams

1,289 dams in the National Inventory of Dams.

National Inventory of Dams

Browse 1,289 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
Colebrook River Dam Connecticut Litchfield 223 High Not Available 1969 Flood Risk Reduction
Mad River Flood Control Dam Connecticut Litchfield 178 High Satisfactory 1963 Flood Risk Reduction
Nepaug Dam Connecticut Litchfield 156 High Fair 1918 Water Supply
Shepaug Connecticut New Haven 138 High Satisfactory 1955 Hydroelectric
Saville Dam Connecticut Litchfield 137 High Satisfactory 1940 Water Supply
Thomaston Dam Connecticut Litchfield 137 High Not Available 1960 Flood Risk Reduction
Black Rock Dam Connecticut Litchfield 130 High Not Available 1971 Flood Risk Reduction
Samuel P. Senior Dam Connecticut Fairfield 130 High Satisfactory 1941 Water Supply
Goodwin Connecticut Hartford 125 High Satisfactory 1960 Hydroelectric
Easton Reservoir Dam Connecticut Fairfield 123 High Fair 1926 Water Supply
Lake Gaillard Dam Connecticut New Haven 118 High Satisfactory 1929 Water Supply
Lake Watrous Dam Connecticut New Haven 116 High Satisfactory 1915 Water Supply
Northfield Brook Dam Connecticut Litchfield 111 High Not Available 1965 Flood Risk Reduction
Rocky River Main Dam Connecticut Litchfield 107 High Satisfactory 1929 Hydroelectric
John D. Milne Lake Dam Connecticut Fairfield 105 High Fair 1947 Water Supply
Stevenson Connecticut Fairfield 103 High Satisfactory 1919 Hydroelectric
Wasel Reservoir Dam Connecticut Hartford 100 High Satisfactory 1966 Water Supply
Lake Chamberlain Dam Connecticut New Haven 93 High Satisfactory 1890 Water Supply
East Branch Flood Control Dam Connecticut Litchfield 92 High Satisfactory — Flood Risk Reduction
Upper Shepaug Dam Connecticut Litchfield 90 High Satisfactory 1965 Water Supply
Hop Brook Dam Connecticut New Haven 89 High Not Available 1968 Flood Risk Reduction
Pitch Reservoir Dam Connecticut Litchfield 85 High Satisfactory 1944 Water Supply
Whiting River Flood Control Dam Connecticut Litchfield 80 High Satisfactory 1968 Flood Risk Reduction
Reuben Hart Reservoir Dam Connecticut Litchfield 80 High Satisfactory 1933 Water Supply
Long Hill Reservoir Dam Connecticut New Haven 80 High Satisfactory 1914 Water Supply
Mansfield Hollow Dam Connecticut Windham 78 High Not Available 1952 Flood Risk Reduction
Mansfield Hollow Dam - Dike C Connecticut Tolland 78 High Not Available 1952 Flood Risk Reduction
Mansfield Hollow Dam - Dike A and B Connecticut Tolland 78 High Not Available 1952 Flood Risk Reduction
Mansfield Hollow Dam - Dike D and E Connecticut Tolland 78 High Not Available 1952 Flood Risk Reduction
Mansfield Hollow Dam - Dike F Connecticut Tolland 78 High Not Available 1952 Flood Risk Reduction
Wigwam Reservoir Dam Connecticut Litchfield 75 Significant Satisfactory 1893 Water Supply
Compensating Reservoir Dam Connecticut Litchfield 75 High Fair 1920 Water Supply
Samuel Bargh Reservoir Dam Connecticut Fairfield 75 High Satisfactory 1955 Water Supply
Hall Meadow Brook Flood Control Dam Connecticut Litchfield 75 High Satisfactory 1962 Flood Risk Reduction
Hemlock Reservoir Dam Connecticut Fairfield 75 High Fair 1914 Water Supply
Lake Glen Dam Connecticut New Haven 72 High Satisfactory 1907 Water Supply
Rocky River Canal Dike Connecticut Litchfield 72 High Satisfactory 1902 Hydroelectric
West Thompson Dam Connecticut Windham 70 High Not Available 1965 Flood Risk Reduction
Morris Reservoir Dam Connecticut Litchfield 70 High Satisfactory 1910 Water Supply
Nepaug Phelps Dam Connecticut Hartford 69 High Satisfactory 1916 Water Supply
Sucker Brook Flood Control Dam Connecticut Litchfield 68 High Satisfactory 1970 Flood Risk Reduction
Mulberry Reservoir Dam Connecticut New Haven 66 High Satisfactory 1897 Water Supply
Lake Bethany Dam Connecticut New Haven 66 High Satisfactory 1892 Water Supply
Shepaug Reservoir Dam Connecticut Litchfield 65 High Satisfactory 1933 Water Supply
Hammonasset Dam Connecticut New Haven 63 High Satisfactory 1956 Water Supply
Deep River Reservoir Dam Connecticut New London 62 High Satisfactory 1926 Water Supply
Menunkatuck Reservoir Dam Connecticut New Haven 61 High Satisfactory 1929 Water Supply
Lake Dawson Dam Connecticut New Haven 60 High Satisfactory 1890 Water Supply
Bristol Reservoir #5 Dam Connecticut Litchfield 60 High Satisfactory 1932 Water Supply
Whigville Reservoir Dam Connecticut Hartford 58 High Satisfactory 1909 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.