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 1101–1125 of 1,225
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Unnamed Pond Dam Litchfield County | — | — | Significant | Not Rated |
| Up Dam (H Bigelow V G C) Windham County | 10 | — | Significant | Not Rated |
| Upper Ansonia Reservoir East Dike New Haven County | 12 | — | High | Fair |
| 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 Guilford Lakes Dam New Haven County | 12 | 1929 | Significant | Fair |
| Upper Hart Pond Dam Hartford County | 14 | 1920 | High | Satisfactory |
| Upper Kohanza Lake Dam Fairfield County | 30 | 1866 | High | Satisfactory |
| Upper Mianus River Dam Fairfield County | 3 | 1930 | Significant | Not Rated |
| Upper Millpond Dam New London County | 11 | 1820 | Significant | Satisfactory |
| Upper Mill Pond Dam Middlesex County | 8 | 1813 | Low | Poor |
| Upper Mill Pond Dam Middlesex County | 12 | 1860 | Significant | Fair |
| Upper Murray Pond Dam Middlesex County | 7 | — | Significant | Satisfactory |
| Upper Pond Dam Hartford County | 8 | — | Significant | Satisfactory |
| Upper Pond Dam Litchfield County | 20 | 1880 | Significant | Fair |
| Upper Pond Dam New London County | 12 | 1860 | Significant | Satisfactory |
| Upper Pond Dam #1 Middlesex County | 8 | — | Significant | Poor |
| Upper Shepaug Dam Litchfield County | 90 | 1965 | High | Satisfactory |
| Upper Unionville Reservoir Dam Hartford County | 23 | 1909 | Significant | Fair |
| Upper Wasilewski Pond Dam Tolland County | 14 | — | Significant | Not Rated |
| Urban Pond Dam Middlesex County | — | — | Significant | Fair |
| Useful Pond Dam Middlesex County | 15 | — | Significant | Fair |
| Valley Lake Dam Fairfield County | 10 | — | Significant | Not Rated |
| Valley Pond Dam Fairfield County | 10 | — | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.