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 101–125 of 254
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Highland Lake Dam Litchfield County | 27 | 1860 | High | Fair |
| Highstead Pond Dam Fairfield County | 13 | 1985 | Significant | Fair |
| Hockanum Reservoir Dam Tolland County | 37 | 1890 | High | Fair |
| House Rest Pond Dam Hartford County | 6 | — | Significant | Fair |
| Indian Lake Dam New Haven County | 10 | 1900 | Significant | Fair |
| Indian Rock Pond Dam Hartford County | 13 | — | Significant | Fair |
| Irving Pond Dam Litchfield County | 23 | 1945 | Significant | Fair |
| Isinglass Reservoir Dam Fairfield County | 24 | — | Significant | Fair |
| Island Brook Lagoon Dam Fairfield County | 19 | — | High | Fair |
| Ivy Mountain Dam Litchfield County | 20 | — | Low | Fair |
| John D. Milne Lake Dam Fairfield County | 105 | 1947 | High | Fair |
| Johns Pond Dam Fairfield County | 8 | — | Significant | Fair |
| Jones Pond Dam Tolland County | 11 | — | Significant | Fair |
| Kasson Road Pond Dam Litchfield County | 8 | — | Significant | Fair |
| Kelly Pond Dam Litchfield County | 7 | — | Significant | Fair |
| Killingly Pond Dam Windham County | 12 | 1900 | Significant | Fair |
| Lake Chaffee Dam Windham County | 3 | 1880 | Significant | Fair |
| Lake Elise Dam New Haven County | 12 | 1900 | Significant | Fair |
| Lake Hayward Dam Middlesex County | 8 | 1877 | Significant | Fair |
| Lake Konomoc Dam New London County | 23 | 1872 | High | Fair |
| Lake Mark Dam Tolland County | 21 | 1957 | Significant | Fair |
| Lake of Isles Dam New London County | 15 | 1920 | Significant | Fair |
| Lake Plymouth Dam Litchfield County | 11 | 1900 | Significant | Fair |
| Lakeville Reservoir #2 Dam Litchfield County | 22 | — | Significant | Fair |
| Lake Waramaug Dam Litchfield County | 3 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.