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 401–425 of 474
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Stannard Pond Dam New Haven County | 8 | — | Significant | Satisfactory |
| Sterling Pond Dam Windham County | 19 | 1870 | High | Satisfactory |
| Stevenson Fairfield County | 103 | 1919 | High | Satisfactory |
| Stillman Pond Dam Fairfield County | 11 | 1915 | Significant | Satisfactory |
| Stillwater Pond Dam Litchfield County | 34 | — | High | Satisfactory |
| Stone Hill Reservoir Dam New London County | 35 | 1894 | Significant | Satisfactory |
| Stone Pond Dam Hartford County | 12 | 1887 | Significant | Satisfactory |
| Streets Pond Dam Fairfield County | 8 | — | Significant | Satisfactory |
| Sucker Brook Flood Control Dam Litchfield County | 68 | 1970 | High | Satisfactory |
| Sweetheart Lake Dam Tolland County | 16 | 1927 | Significant | Satisfactory |
| Sylvan Lake Dam Litchfield County | 4 | — | Significant | Satisfactory |
| Taftville Hydro Dam #4 New London County | 41 | 1867 | High | Satisfactory |
| Talcott Flood Control Dam #1 Hartford County | 30 | 1964 | High | Satisfactory |
| Talcott Flood Control Dam #2 Hartford County | 19 | 1964 | High | Satisfactory |
| Tantaquidgeon New London County | 30 | — | Low | Satisfactory |
| Tarrywile Lake Dam Fairfield County | 12 | 1900 | Significant | Satisfactory |
| Thurston Pond Dam New Haven County | 20 | 1890 | High | Satisfactory |
| Tinker Pond Dam Tolland County | 10 | 1900 | Significant | Satisfactory |
| Tunnel Dam Hydro Station New London County | 32 | 1906 | Significant | Satisfactory |
| Tyler Lake Dam Litchfield County | 6 | 1880 | Significant | Satisfactory |
| Ulbrich Reservoir Dam New Haven County | 17 | 1966 | High | Satisfactory |
| Upper Bolton Lake Causeway Dam Tolland County | 7 | — | Significant | Satisfactory |
| Upper Collinsville Hartford County | 18 | 1837 | Significant | Satisfactory |
| Upper Detention Basin Dam New Haven County | 21 | — | Significant | Satisfactory |
| Upper Hart Pond Dam Hartford County | 14 | 1920 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.