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 76–100 of 236
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pin Shop Pond Dam Litchfield County | 23 | 1870 | High | Fair |
| Pinewood Lake Dam Fairfield County | 28 | 1890 | High | Satisfactory |
| Pemberwick Dam Fairfield County | 44 | 1867 | High | Fair |
| Peat Swamp Reservoir Dam New Haven County | 41 | 1925 | High | Poor |
| Pattaconk Reservoir Dam Middlesex County | 23 | 1932 | High | Fair |
| Pataguanset Lake Dam New London County | 12 | 1942 | High | Fair |
| Park Pond Dam Litchfield County | 20 | — | High | Satisfactory |
| Paper Mill Pond Dam Tolland County | — | 1900 | High | Satisfactory |
| Padanaram Reservoir Dam Fairfield County | 29 | 1883 | High | Satisfactory |
| Packers Pond Dam Windham County | 20 | 1880 | High | Satisfactory |
| Pachaug Pond Dam New London County | 17 | 1888 | High | Fair |
| Oxoboxo Lake Dam New London County | 26 | 1810 | High | Satisfactory |
| Old Marsh Pond Dam Litchfield County | 30 | 1913 | High | Satisfactory |
| Obed Heights Reservoir Dam Middlesex County | 15 | 1880 | High | Satisfactory |
| North Stamford Reservoir Dam Fairfield County | 40 | 1908 | High | Fair |
| North Pond Reservoir Dam Litchfield County | 20 | 1840 | High | Satisfactory |
| North Meadows Dike Hartford County | 24 | 1939 | High | Not Rated |
| North Grosvenordale Dam Windham County | 25 | 1900 | High | Poor |
| Northfield Brook Dam Litchfield County | 111 | 1965 | High | Not Available |
| Norfolk Brook Flood Control Dam #6 Litchfield County | 43 | 1966 | High | Satisfactory |
| New Canaan Reservoir Dam Fairfield County | 44 | 1898 | High | Satisfactory |
| New Britain Reservoir Dam New Haven County | 42 | 1904 | High | Satisfactory |
| Nepaug Dam Litchfield County | 156 | 1918 | High | Fair |
| Nash Pond Dam Fairfield County | 22 | 1879 | High | Satisfactory |
| Mystic Reservoir Dam New London County | 34 | 1880 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.