Connecticut Dams
1,225 dams tracked by the National Inventory of Dams
Total Dams
1,225
High Hazard
236
19.3%
Poor / Unsatisfactory
126
Average Age
115 yrs
Hazard Classification
High236 (19.3%)
Significant936 (76.4%)
Low53 (4.3%)
Condition Assessment
Satisfactory474 (38.7%)
Fair254 (20.7%)
Poor / Unsatisfactory126 (10.3%)
Not Rated371 (30.3%)
Federal
9
State
169
Local
254
Private
697
Tallest Dams
- Colebrook River Dam223 ft
- Mad River Flood Control Dam178 ft
- Nepaug Dam156 ft
- Shepaug 138 ft
- Saville Dam137 ft
High Hazard Dams
- Colebrook River DamHigh
- Mad River Flood Control DamHigh
- Nepaug DamHigh
- Shepaug High
- Saville DamHigh
Poor Condition Dams
All Dams in Connecticut
Showing 101–125 of 236
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Konomoc Dam New London County | 23 | 1872 | High | Fair |
| Lake Phipps Dam #2 New Haven County | 16 | 1880 | High | Satisfactory |
| Lake Saltonstall Dam New Haven County | 34 | 1882 | High | Satisfactory |
| Lake Watrous Dam New Haven County | 116 | 1915 | High | Satisfactory |
| Lake Whitney Dam New Haven County | 44 | 1861 | High | Poor |
| Lake Winnemaug Dam Litchfield County | 24 | 1920 | High | Satisfactory |
| Lake Wintergreen Dam New Haven County | 31 | 1863 | High | Satisfactory |
| Laurel Brook Reservoir Dam Middlesex County | 20 | 1866 | High | Satisfactory |
| Laurel Reservoir Dam Fairfield County | 50 | 1923 | High | Satisfactory |
| Leesville Dam Middlesex County | 25 | 1900 | High | Satisfactory |
| Long Hill Reservoir Dam New Haven County | 80 | 1914 | High | Satisfactory |
| Lower Ansonia Reservoir Dam New Haven County | 18 | 1887 | High | Satisfactory |
| Lower Hart Ponds Dam Hartford County | 18 | 1920 | High | Satisfactory |
| Lower Kohanza Lake Dam Fairfield County | 25 | 1860 | High | Satisfactory |
| Lower Scoville Reservoir Dam New Haven County | 15 | 1917 | High | Fair |
| Mackenzie Reservoir Dam New Haven County | 29 | 1944 | High | Fair |
| Mad River Dam Homestead Avenue Dam New Haven County | 31 | 1900 | High | Poor |
| Mad River Flood Control Dam Litchfield County | 178 | 1963 | High | Satisfactory |
| Maltby No. 1 Dam New Haven County | 37 | 1862 | High | Satisfactory |
| Mansfield Hollow Dam Windham County | 78 | 1952 | High | Not Available |
| Margerie Lake Reservoir South Dam Fairfield County | 29 | 1933 | High | Satisfactory |
| Meadow Ridge Detention Dam Fairfield County | 6 | — | High | Poor |
| Meadow Ridge Fire Irrigation Pond Dam Fairfield County | 8 | — | High | Fair |
| Means Brook Reservoir Dam Fairfield County | 54 | 1917 | High | Satisfactory |
| Menunkatuck Reservoir Dam New Haven County | 61 | 1929 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.