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 176–200 of 474
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Nightingale Pond Dam Windham County | 6 | 1722 | Significant | Satisfactory |
| Nichols Pond Dam New Haven County | 10 | — | Significant | Satisfactory |
| New Canaan Reservoir Dam Fairfield County | 44 | 1898 | High | Satisfactory |
| New Britain Reservoir Dam New Haven County | 42 | 1904 | High | Satisfactory |
| Nelson Gustine Dam Middlesex County | 15 | 1968 | Significant | Satisfactory |
| Nash Pond Dam Litchfield County | 11 | 1975 | Significant | Satisfactory |
| Nash Pond Dam Fairfield County | 22 | 1879 | High | Satisfactory |
| Name Plate Pond Dam Tolland County | 11 | — | Significant | Satisfactory |
| Mystic Reservoir Dam New London County | 34 | 1880 | High | Satisfactory |
| Myers Pond Dam Fairfield County | 9 | — | Significant | Satisfactory |
| Mulberry Reservoir Dam New Haven County | 66 | 1897 | High | Satisfactory |
| Mount Higby Reservoir Dam Middlesex County | 30 | 1897 | High | Satisfactory |
| Mountain Pond Dam Fairfield County | 15 | 1901 | Significant | Satisfactory |
| Morris Reservoir Dam Litchfield County | 70 | 1910 | High | Satisfactory |
| Morosani Pond #1 Dam Litchfield County | 18 | 1969 | Significant | Satisfactory |
| Morgan Pond Dam New London County | 45 | 1966 | Significant | Satisfactory |
| Morey Pond Dam Windham County | 19 | 1870 | Significant | Satisfactory |
| Moody Reservoir Dam New Haven County | 56 | 1900 | High | Satisfactory |
| Moodus Reservoir Dam Middlesex County | 18 | 1882 | Significant | Satisfactory |
| Mono Pond Dam Tolland County | 13 | 1990 | Significant | Satisfactory |
| Mohegan Brook Dam New London County | 5 | — | Significant | Satisfactory |
| Mixville Pond Dam New Haven County | 14 | 1870 | High | Satisfactory |
| Mirror Lake Dam New Haven County | 20 | 1949 | Significant | Satisfactory |
| Mill Pond Dam Hartford County | 19 | 1677 | Significant | Satisfactory |
| Miller Pond Dam New London County | 20 | 1873 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.