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 1026–1050 of 1,225
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Stiles Pond Dam New London County | 20 | 1870 | Significant | Not Rated |
| Stillman Pond Dam Fairfield County | 11 | 1915 | Significant | Satisfactory |
| Stillwater Pond Dam Litchfield County | 34 | — | High | Satisfactory |
| Still Waters Pond Dam New London County | 8 | — | Low | Not Rated |
| Stoddard Dam New Haven County | 13 | — | Significant | Fair |
| Stoddard Reservoir Dam Hartford County | 8 | — | Significant | Poor |
| Stone Hill Reservoir Dam New London County | 35 | 1894 | Significant | Satisfactory |
| Stone Pond Dam Hartford County | 12 | 1887 | Significant | Satisfactory |
| Stony Batter Pond Dam Litchfield County | 12 | 1945 | Significant | Not Rated |
| Stony Brook Reservoir Dam New London County | 40 | 1912 | Significant | Fair |
| Straitsville Reservoir Dam New Haven County | 25 | 1900 | Significant | Fair |
| Street Pond Dam Fairfield County | 3 | — | Significant | Not Rated |
| Streets Pond Dam Fairfield County | 8 | — | Significant | Satisfactory |
| Stroh Park Sktng Pond Hartford County | 6 | — | Significant | Not Rated |
| Stub Pond Dam Hartford County | 7 | 1918 | Significant | Fair |
| Success Lake Dam Fairfield County | 15 | 1875 | Significant | Not Rated |
| Sucker Brook Flood Control Dam Litchfield County | 68 | 1970 | High | Satisfactory |
| Summit Pond Dam New Haven County | 5 | — | Significant | Not Rated |
| Sunset Farms Pond Dam Hartford County | 6 | — | Significant | Not Rated |
| Sunset Lake New Haven County | 5 | — | Significant | Not Rated |
| Sun Valley Lake Dam Tolland County | 15 | 1964 | Significant | Not Rated |
| Swan Lake Dam New Haven County | 28 | 1920 | High | Fair |
| Swede Pond Dam Hartford County | 18 | — | Significant | Poor |
| Sweetheart Lake Dam Tolland County | 16 | 1927 | Significant | Satisfactory |
| Sylvan Lake Dam Litchfield County | 4 | — | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.