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 751–775 of 1,225
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| New Pond Dam Tolland County | 13 | 1900 | Significant | Fair |
| New Pond Dam Windham County | 14 | — | Significant | Not Rated |
| Newtown Pond Dam Fairfield County | 8 | — | Significant | Not Rated |
| Nichols Pond Dam New Haven County | 10 | — | Significant | Satisfactory |
| Nightingale Pond Dam Windham County | 6 | 1722 | Significant | Satisfactory |
| Nimrod Pond Dam Hartford County | 8 | — | Significant | Not Rated |
| Nipmuck Pond Dam Tolland County | 10 | 1960 | Significant | Satisfactory |
| Norfolk Brook Flood Control Dam #6 Litchfield County | 43 | 1966 | High | Satisfactory |
| North Alvia Chase Reservoir Dam Windham County | 6 | — | Significant | Satisfactory |
| North Farms Reservoir Dam New Haven County | 5 | 1926 | Significant | Poor |
| Northfield Brook Dam Litchfield County | 111 | 1965 | High | Not Available |
| Northfield Pond Dam Litchfield County | 13 | 1855 | Significant | Satisfactory |
| North Grosvenordale Dam Windham County | 25 | 1900 | High | Poor |
| North Meadows Dike Hartford County | 24 | 1939 | High | Not Rated |
| North Pond Dam New Haven County | 14 | 1967 | Significant | Fair |
| North Pond Reservoir Dam Litchfield County | 20 | 1840 | High | Satisfactory |
| Northrop Pond Dam New Haven County | 15 | — | Significant | Not Rated |
| North Stamford Reservoir Dam Fairfield County | 40 | 1908 | High | Fair |
| Norton Pond Dam Hartford County | 9 | — | Significant | Not Rated |
| Norwich State Hospital Pond Dam New London County | 19 | — | Significant | Satisfactory |
| Notch Pond Dam Tolland County | 8 | — | Significant | Fair |
| Nystrom Pond Dam Litchfield County | 16 | 1889 | Significant | Satisfactory |
| Oakdale Pond Dam New London County | 6 | — | Significant | Not Rated |
| Obed Heights Reservoir Dam Middlesex County | 15 | 1880 | High | Satisfactory |
| Occum New London County | 14 | 1900 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.