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 801–825 of 1,225
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hallville Pond Dam New London County | 13 | 1920 | Significant | Fair |
| Halls Pond Dike Windham County | 10 | 1900 | Significant | Satisfactory |
| Halls Pond Dam Tolland County | 22 | 1920 | Significant | Fair |
| Hall Pond Dam Fairfield County | 5 | — | Significant | Fair |
| Hallmere Reservoir Dam Hartford County | 45 | 1897 | High | Satisfactory |
| Hall Meadow Brook Flood Control Dam Litchfield County | 75 | 1962 | High | Satisfactory |
| Hale Dam Windham County | 18 | 1900 | Significant | Not Rated |
| Halchek Pond Dam Tolland County | 26 | 1972 | Significant | Fair |
| Gusceon Cemetery Dam Litchfield County | 8 | — | Significant | Fair |
| Gunsight Pond Dam Middlesex County | 17 | — | Significant | Fair |
| Guilford Sportsman Association Dam New Haven County | 12 | — | Significant | Not Rated |
| Grupes Reservoir Dam Fairfield County | 24 | 1871 | High | Poor |
| Gritman Pond Dam Litchfield County | 12 | 1920 | Significant | Poor |
| Griswold Pond #2 Dam Middlesex County | 10 | — | Significant | Poor |
| Griggs Pond Dam Windham County | 7 | 1870 | Significant | Satisfactory |
| Griffins Pond Dam New Haven County | 5 | — | Significant | Not Rated |
| Greystone Falls Dam Litchfield County | 20 | — | Significant | Satisfactory |
| Greenville New London County | 15 | 1888 | Low | Satisfactory |
| Green Pond Dam Fairfield County | 10 | 1900 | Significant | Satisfactory |
| Greenley Pond Dam Fairfield County | 9 | — | Significant | Not Rated |
| Green Falls Reservoir Dam New London County | 32 | 1870 | Significant | Satisfactory |
| Green Acre Lane Pond Dam Fairfield County | 4 | — | Significant | Fair |
| Great Swamp Flood Control Dam Fairfield County | 12 | 1979 | High | Satisfactory |
| Great Pond Dam Hartford County | 9 | 1930 | Low | Not Rated |
| Great Pond Dam Fairfield County | 20 | — | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.