119Total Dams
17High Hazard
99Significant
Dam Safety in Middlesex County, Connecticut
Middlesex County has 119 dams tracked in the National Inventory of Dams. Of these, 17 are classified as high hazard — meaning failure would probably cause loss of human life. Another 99 carry a significant hazard classification. Currently, 16 dams have a condition assessment of poor or unsatisfactory.
The average dam in Middlesex County is 132 years old. The most common purpose is recreation. The tallest dam is Crystal Lake Dam at 50 ft.
Explore more: Oldest dams in Connecticut · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Crystal Lake Dam | High | Poor | 50 | Recreation | 1850 |
| Higganum Reservoir Dam | High | Fair | 48 | Recreation | 1868 |
| Killingworth Reservoir Dam | High | Satisfactory | 46 | Water Supply | 1895 |
| Bushy Hill Pond Dam | High | Satisfactory | 33 | Water Supply | 1871 |
| Mount Higby Reservoir Dam | High | Satisfactory | 30 | Water Supply | 1897 |
| Portland Reservoir Dam | High | Satisfactory | 28 | Water Supply | 1964 |
| Adder Reservoir | High | Fair | 28 | Water Supply | 1934 |
| Leesville Dam | High | Satisfactory | 25 | Recreation | 1900 |
| Dooley Pond Dam | High | Fair | 24 | Recreation | 1870 |
| Messerschmidt Pond Dam | High | Fair | 23 | Recreation | 1890 |
| Pattaconk Reservoir Dam | High | Fair | 23 | Recreation | 1932 |
| Jennings Pond Dam | High | Satisfactory | 22 | Recreation | 1870 |
| Scovill Reservoir Dam | High | Satisfactory | 21 | Recreation | 1860 |
| Laurel Brook Reservoir Dam | High | Satisfactory | 20 | Water Supply | 1866 |
| Mill Pond Dam | High | Fair | 18 | Recreation | 1721 |
| Obed Heights Reservoir Dam | High | Satisfactory | 15 | Recreation | 1880 |
| Wrights Pond Dam | High | Fair | 10 | Recreation | 1890 |
| Asylum Reservoir #2 Dam | Significant | Fair | 35 | Water Supply | |
| Lake Beseck Dam | Significant | Satisfactory | 34 | Recreation | 1846 |
| Asylum Reservoir #4 Dam | Significant | Satisfactory | 30 | Water Supply | |
| Deep Hollow Reservoir Dam | Significant | Satisfactory | 28 | Water Supply | 1854 |
| Asylum Reservoir Dam #6 | Significant | Fair | 28 | Water Supply | 1954 |
| Ymca Camp Farnam Pond Dam | Significant | Fair | 26 | Recreation | 1931 |
| Johnson Millpond Dam | Significant | Satisfactory | 25 | Recreation | 1880 |
| Bashan Lake Dam | Significant | Satisfactory | 24 | Recreation | 1939 |
| Drop Pond Dam | Significant | Satisfactory | 22 | Recreation | |
| Arrigoni Pond Dam | Significant | Satisfactory | 21 | Recreation | 1945 |
| Zoar Pond Dam | Significant | Poor | 21 | Recreation | |
| Butternut Hollow Pond Dam | Significant | Satisfactory | 21 | Recreation | 1935 |
| Deuses Pond Dam | Significant | Satisfactory | 20 | Hydroelectric | 1916 |
| Bell Shop Dam | Significant | Satisfactory | 20 | Recreation | |
| Berlin Fish & Game Dam | Significant | Not assessed | 20 | Recreation | 1972 |
| Moodus Reservoir Dam | Significant | Satisfactory | 18 | Recreation | 1882 |
| Highland Pond Dam | Significant | Satisfactory | 18 | Irrigation | 1875 |
| Foster Pond Dam | Significant | Satisfactory | 17 | Recreation | 1900 |
| Chestnut Brook Dam | Significant | Satisfactory | 17 | Recreation | |
| Pickerel Lake Dam | Significant | Poor | 17 | Recreation | 1870 |
| Gunsight Pond Dam | Significant | Fair | 17 | Irrigation | |
| Useful Pond Dam | Significant | Fair | 15 | Water Supply | |
| Nelson Gustine Dam | Significant | Satisfactory | 15 | Recreation | 1968 |
| Schriber Park (great Brook Dam) | Significant | Fair | 15 | Recreation | |
| Tetram Pond Dam | Significant | Fair | 15 | Recreation | 1923 |
| Asylum Reservoir #5 Dam | Significant | Satisfactory | 15 | Water Supply | 1879 |
| Markham Pond Dam | Significant | Satisfactory | 14 | Fish and Wildlife Pond | |
| Boulder Lake Dam | Significant | Fair | 14 | Recreation | 1940 |
| Great Hill Pond Dam | Significant | Poor | 14 | Recreation | 1870 |
| Bevins Pond Dam | Significant | Fair | 14 | Recreation | 1898 |
| Great Brook Dam #1 | Significant | Fair | 14 | Recreation | |
| Lochwood Lake Dam | Significant | Satisfactory | 13 | Recreation | 1973 |
| Hidden Lake Dam | Significant | Satisfactory | 13 | Recreation | 1860 |
| Pattaconk Dam #3 | Significant | Satisfactory | 13 | Recreation | |
| Sportsmen Pond Dam | Significant | Not assessed | 13 | Recreation | |
| J B Taylor Dam | Significant | Not assessed | 13 | Recreation | |
| Kelseytown Reservoir Dam | Significant | Satisfactory | 12 | Water Supply | 1895 |
| Deer Lake Dam | Significant | Satisfactory | 12 | Recreation | 1920 |
| Coginchaug River Dam #1 | Significant | Satisfactory | 12 | Recreation | |
| Lower Murray Pond Dam | Significant | Not assessed | 12 | Irrigation | 1924 |
| Heinrich Pond Dam | Significant | Satisfactory | 12 | Recreation | |
| Upper Mill Pond Dam | Significant | Fair | 12 | Recreation | 1860 |
| Durham Rod & Gun Club Dam | Significant | Not assessed | 12 | Recreation | 1993 |
| Artistic Wire Company Pond Dam | Significant | Not assessed | 12 | Other | |
| Spring Street Dam | Significant | Not assessed | 11 | Recreation | |
| Schreeder Pond Dam | Significant | Satisfactory | 11 | Recreation | 1900 |
| Pameacha Pond Dam | Significant | Poor | 11 | Other | 1870 |
| State Park Pond Dam | Significant | Poor | 11 | Recreation | |
| Pratt Read Dam | Significant | Satisfactory | 11 | Recreation | 1860 |
| Westfield Falls Pond Dam | Significant | Satisfactory | 11 | Recreation | |
| Deraad Pond Dam | Significant | Not assessed | 10 | Fish and Wildlife Pond | |
| Cockaponset Pond Dam | Significant | Satisfactory | 10 | Recreation | |
| Miller Pond Dam | Significant | Fair | 10 | Recreation | 1880 |
| Kelsey Pond Dam | Significant | Not assessed | 10 | Recreation | 1860 |
| Little City Pond | Significant | Not assessed | 10 | Recreation | |
| Kroupa Pond Dam | Significant | Satisfactory | 10 | Recreation | 1900 |
| Wadsworth Falls Dam #2 | Significant | Poor | 10 | Recreation | |
| Starr Mill Pond Dam | Significant | Fair | 10 | Recreation | 1875 |
| Turkey Hill Reservoir Dam & Dike | Significant | Poor | 10 | Water Supply | |
| Griswold Pond #2 Dam | Significant | Poor | 10 | Recreation | |
| Turnpike Pond Dam | Significant | Fair | 9 | Recreation | 1900 |
| Rogers Pond Dam | Significant | Satisfactory | 9 | Recreation | 1850 |
| Birch Mill Pond Dam | Significant | Fair | 9 | Recreation | 1850 |
| Ivoryton Pond Dam | Significant | Satisfactory | 8 | Recreation | |
| Post Pond Dam | Significant | Fair | 8 | Recreation | |
| Brownell Pond Dam | Significant | Fair | 8 | Recreation | |
| Hurd Park Pond Dam | Significant | Not assessed | 8 | Recreation | |
| Upper Pond Dam #1 | Significant | Poor | 8 | Recreation | |
| Lake Hayward Dam | Significant | Fair | 8 | Recreation | 1877 |
| Camp Ramah Upper Pond | Significant | Poor | 8 | Recreation | |
| Peck's Meadow Pond Dam | Significant | Fair | 8 | Recreation | 1880 |
| Dunham Pond | Significant | Not assessed | 7 | Recreation | |
| Upper Murray Pond Dam | Significant | Satisfactory | 7 | Recreation | |
| Trouble Pond Dam | Significant | Poor | 7 | Recreation | |
| Black Shop Pond Dam | Significant | Satisfactory | 7 | Recreation | |
| West Swamp Brook Dam (gilbert) | Significant | Not assessed | 7 | Recreation | |
| Hedlund Pond | Significant | Not assessed | 6 | Recreation | |
| Wopowog Pond Dam | Significant | Not assessed | 6 | Recreation | |
| Will Cone Pond Dam | Significant | Not assessed | 6 | Recreation | |
| Old Mill Pond Dam | Significant | Satisfactory | 6 | Recreation | |
| Lake Pocotopaug Dam | Significant | Satisfactory | 6 | Recreation | 1953 |
| Bochain Pond | Significant | Not assessed | 5 | Recreation | |
| Wallien Pond | Significant | Not assessed | 5 | Recreation | |
| Gillette Castle Bridge Pond Dam | Significant | Not assessed | 5 | Recreation | |
| Pearson Pond Dam | Significant | Not assessed | 5 | Recreation | |
| Chalkers Millpond Dam | Significant | Poor | 5 | Recreation | 1845 |
| Miner Pond Dam | Significant | Not assessed | 5 | Recreation | |
| Pizzini Pond Dam | Significant | Not assessed | 5 | Recreation | |
| Asylum Reservoir #1 Dam | Significant | Poor | 5 | Water Supply | |
| Dolan's Pond | Significant | Not assessed | 5 | Recreation | |
| Staba Pond | Significant | Not assessed | 4 | Recreation | |
| Bartman Road Pond Dam | Significant | Not assessed | 4 | Fish and Wildlife Pond | |
| Gillette Castle Goldfish Pond Dam | Significant | Not assessed | 4 | Recreation | |
| Cedar Lake Dam | Significant | Not assessed | 4 | Recreation | |
| Tiffany Brook Pond Dam | Significant | Not assessed | 4 | Recreation | |
| Gillette Castle Dam | Significant | Poor | 4 | Recreation | |
| Waterhouse Pond Dam | Significant | Satisfactory | 4 | Water Supply | 1902 |
| Gates Pond | Significant | Not assessed | 0 | Recreation | |
| Urban Pond Dam | Significant | Fair | 0 | Recreation | |
| Tower Hill Lake Dam | Low | Not assessed | 20 | Recreation | 1920 |
| Upper Mill Pond Dam | Low | Poor | 8 | Recreation | 1813 |
| Comstock Pond Dam | Low | Not assessed | 7 | Other | 1874 |