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 951–975 of 1,225
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Seymour Reservoir #3 Dam New Haven County | 42 | 1910 | Significant | Fair |
| Seymour Reservoir #4 Dam New Haven County | 28 | 1951 | Significant | Poor |
| Shadow Lake Dam Fairfield County | 25 | 1937 | Significant | Fair |
| Shady Lake Dam Tolland County | 12 | — | Significant | Poor |
| Shaker Pond Dam Hartford County | 12 | 1880 | Significant | Fair |
| Shelton Reservoir #2 Dam Fairfield County | 16 | 1900 | High | Fair |
| Shelton Reservoir #3 Dam Fairfield County | 20 | 1915 | Significant | Fair |
| Shenipsit Flood Control Site #6 Dam Tolland County | 29 | 1961 | High | Satisfactory |
| Shenipsit Lake Dam Tolland County | 27 | 1903 | High | Satisfactory |
| Shepards Pond Dam Windham County | 38 | 1890 | Significant | Satisfactory |
| Shepaug New Haven County | 138 | 1955 | High | Satisfactory |
| Shepaug Reservoir Dam Litchfield County | 65 | 1933 | High | Satisfactory |
| Sherwood Mill Pond Dam Fairfield County | 10 | 1900 | Significant | Not Rated |
| Shunock River Dam New London County | 9 | — | Significant | Not Rated |
| Shuttle Meadow Reservoir Dam Hartford County | 48 | 1894 | High | Satisfactory |
| Silver Brook Dam New Haven County | 8 | — | Significant | Not Rated |
| Silver Lake Dam New Haven County | 7 | — | Significant | Fair |
| Silver Lake Dam Hartford County | 15 | 1920 | High | Fair |
| Silvermine Dam Fairfield County | 18 | — | Significant | Fair |
| Silvia'S Lower Pond Dam New London County | 14 | — | High | Poor |
| Silvia'S Upper Pond Dam New London County | 12 | 1870 | High | Fair |
| Siscowit Reservoir Dam Fairfield County | 6 | 1865 | Significant | Fair |
| Skating Pond Dam New London County | 16 | 1968 | High | Satisfactory |
| Skyline Ridge Road Pond Dam Litchfield County | 4 | — | Significant | Not Rated |
| Slopers Pond Dam Hartford County | 10 | — | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.