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 1–25 of 236
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Wrights Pond Dam Middlesex County | 10 | 1890 | High | Fair |
| Woodridge Lake Dam Litchfield County | 34 | 1970 | High | Satisfactory |
| Wood Creek Flood Control Dam Site #9 Litchfield County | 36 | 1971 | High | Satisfactory |
| Wintonbury Flood Control Site #1 Dam Hartford County | 23 | 1963 | High | Satisfactory |
| Willimantic Reservoir Dam Windham County | 29 | 1885 | High | Satisfactory |
| Williams Pond Dam Hartford County | 17 | 1900 | High | Poor |
| Whitney Flood Control Site #1 Dam Tolland County | 52 | 1962 | High | Satisfactory |
| Whiting River Flood Control Dam Litchfield County | 80 | 1968 | High | Satisfactory |
| Whigville Reservoir Dam Hartford County | 58 | 1909 | High | Satisfactory |
| West Thompson Dam Windham County | 70 | 1965 | High | Not Available |
| West Side Flood Control Dam #5 Litchfield County | 20 | 1970 | High | Satisfactory |
| West Lake Reservoir Dam Fairfield County | 42 | 1906 | High | Satisfactory |
| Waterbury Reservoir No. 2 Dam New Haven County | 22 | 1880 | High | Satisfactory |
| Wasel Reservoir Dam Hartford County | 100 | 1966 | High | Satisfactory |
| Warren Pond Dam Tolland County | 22 | 1852 | High | Poor |
| Upper Shepaug Dam Litchfield County | 90 | 1965 | High | Satisfactory |
| Upper Kohanza Lake Dam Fairfield County | 30 | 1866 | High | Satisfactory |
| Upper Hart Pond Dam Hartford County | 14 | 1920 | High | Satisfactory |
| Upper Ansonia Reservoir East Dike New Haven County | 12 | — | High | Fair |
| Union Pond Dam Hartford County | 33 | 1901 | High | Fair |
| Ulbrich Reservoir Dam New Haven County | 17 | 1966 | High | Satisfactory |
| Trap Falls Reservoir Dam Fairfield County | 48 | 1905 | High | Fair |
| Thurston Pond Dam New Haven County | 20 | 1890 | High | Satisfactory |
| Thomaston Dam Litchfield County | 137 | 1960 | High | Not Available |
| Talcott Flood Control Dam #2 Hartford County | 19 | 1964 | High | Satisfactory |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.