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 126–150 of 254
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Wequapauset Dam New Haven County | 5 | — | Significant | Fair |
| Lake Windwing Dam Fairfield County | 14 | 1900 | Significant | Fair |
| Lemanquais Pond Dam Litchfield County | 10 | 1968 | Significant | Fair |
| Little Tracys Pond Dam New Haven County | 14 | — | Significant | Fair |
| Lockwood Pond Dam Fairfield County | 10 | — | Significant | Fair |
| Long Pond Dam New London County | 6 | 1880 | Significant | Fair |
| Lower Malone Pondpine Street Hartford County | 6 | — | Significant | Fair |
| Lower Scoville Reservoir Dam New Haven County | 15 | 1917 | High | Fair |
| Lower Unionville Reservoir Dam Hartford County | 16 | — | Significant | Fair |
| Mackenzie Reservoir Dam New Haven County | 29 | 1944 | High | Fair |
| Mamanasco Lake Dam Fairfield County | 6 | 1870 | Significant | Fair |
| Mansfield Training Dam #1 Tolland County | 10 | 1960 | Significant | Fair |
| Mansfield Training Dam #2 Tolland County | 12 | 1968 | Significant | Fair |
| March Pond Dam Litchfield County | 15 | — | Significant | Fair |
| Masterbone Pond Dam Litchfield County | 9 | — | Significant | Fair |
| Meadow Ridge Fire Irrigation Pond Dam Fairfield County | 8 | — | High | Fair |
| Messerschmidt Pond Dam Middlesex County | 23 | 1890 | High | Fair |
| Mianus Filter Plant Dam Fairfield County | 31 | 1875 | High | Fair |
| Middle Hillhouse Road Pond Dam New Haven County | 14 | — | Significant | Fair |
| Miller Pond Dam Middlesex County | 10 | 1880 | Significant | Fair |
| Millers Pond Dam #1 Fairfield County | 13 | — | Significant | Fair |
| Mill Pond Dam Middlesex County | 18 | 1721 | High | Fair |
| Mill Street Dam Hartford County | 17 | — | Significant | Fair |
| Moosup Pond Dam Windham County | 7 | 1970 | Significant | Fair |
| Moss Farm Dam New Haven County | 11 | 1920 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.