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 651–675 of 1,225
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Saltonstall Dam New Haven County | 34 | 1882 | High | Satisfactory |
| Lake Pocotopaug Dam Middlesex County | 6 | 1953 | Significant | Satisfactory |
| Lake Plymouth Dam Litchfield County | 11 | 1900 | Significant | Fair |
| Lake Phipps Dam #2 New Haven County | 16 | 1880 | High | Satisfactory |
| Lake of Isles Dam New London County | 15 | 1920 | Significant | Fair |
| Lake Nova New London County | 8 | 1930 | Low | Not Rated |
| Lake Naraneka Dam Fairfield County | 18 | 1937 | Significant | Satisfactory |
| Lake Mead Dam Fairfield County | 20 | — | Significant | Not Rated |
| Lake Mauweehoo Dam Fairfield County | 22 | 1906 | Significant | Satisfactory |
| Lake Mark Dam Tolland County | 21 | 1957 | Significant | Fair |
| Lake Marie Dam Windham County | 9 | 1880 | Significant | Satisfactory |
| Lake Konomoc Dam New London County | 23 | 1872 | High | Fair |
| Lake Housatonic New Haven County | 25 | 1870 | High | Satisfactory |
| Lake Hayward Dam Middlesex County | 8 | 1877 | Significant | Fair |
| Lake Harwinton Dam Litchfield County | 30 | 1930 | High | Satisfactory |
| Lake Glen Dam New Haven County | 72 | 1907 | High | Satisfactory |
| Lake Garda Dam Hartford County | 17 | 1930 | Significant | Satisfactory |
| Lake Gaillard East Dike New Haven County | 53 | 1929 | High | Satisfactory |
| Lake Forest Dam Fairfield County | 28 | 1899 | High | Satisfactory |
| Lake Floren Dam Litchfield County | 13 | — | Significant | Not Rated |
| Lake Elise Dam New Haven County | 12 | 1900 | Significant | Fair |
| Lake Dawson Dam New Haven County | 60 | 1890 | High | Satisfactory |
| Lake Cuheca Dam New London County | 7 | 1900 | Low | Not Rated |
| Lake Compounce Dam Hartford County | 5 | — | Significant | Not Rated |
| Lake Chamberlain Dam New Haven County | 93 | 1890 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.