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.
| 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.