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 151–175 of 474
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Green Falls Reservoir Dam New London County | 32 | 1870 | Significant | Satisfactory |
| Green Pond Dam Fairfield County | 10 | 1900 | Significant | Satisfactory |
| Greenville New London County | 15 | 1888 | Low | Satisfactory |
| Greystone Falls Dam Litchfield County | 20 | — | Significant | Satisfactory |
| Griggs Pond Dam Windham County | 7 | 1870 | Significant | Satisfactory |
| Hall Meadow Brook Flood Control Dam Litchfield County | 75 | 1962 | High | Satisfactory |
| Hallmere Reservoir Dam Hartford County | 45 | 1897 | High | Satisfactory |
| Halls Pond Dike Windham County | 10 | 1900 | Significant | Satisfactory |
| Hammonasset Dam New Haven County | 63 | 1956 | High | Satisfactory |
| Hampton Reservoir Dam Windham County | 8 | 1944 | Significant | Satisfactory |
| Hams Pond Dam Fairfield County | 10 | — | Significant | Satisfactory |
| Hanover Pond New Haven County | 25 | 2006 | High | Satisfactory |
| Hansens Pond Dam Tolland County | 8 | 1935 | Significant | Satisfactory |
| Happy Acres Dam Windham County | 20 | 1973 | Significant | Satisfactory |
| Hartford Reservoir #2 Dam Hartford County | 32 | 1869 | High | Satisfactory |
| Hatch Pond Dam Litchfield County | 3 | — | Significant | Satisfactory |
| Hattertown Pond Dam Fairfield County | 11 | 1840 | Significant | Satisfactory |
| Heinrich Pond Dam Middlesex County | 12 | — | Significant | Satisfactory |
| Hickok Pond Dam Fairfield County | 6 | — | Significant | Satisfactory |
| Hidden Lake Dam Middlesex County | 13 | 1860 | Significant | Satisfactory |
| Hidden Pond Park Dam New Haven County | 8 | — | Significant | Satisfactory |
| High Hill Pond Dam New Haven County | 17 | 1968 | Significant | Satisfactory |
| Highland Pond Dam Middlesex County | 18 | 1875 | Significant | Satisfactory |
| Hitchcock Lake College Place Dike New Haven County | 5 | 1868 | High | Satisfactory |
| Hoadley Pond Dam New Haven County | 19 | 1873 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.