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 676–700 of 1,225
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Means Brook Reservoir Dam Fairfield County | 54 | 1917 | High | Satisfactory |
| Mechanicsville Windham County | 18 | 1900 | Low | Satisfactory |
| Menunkatuck Reservoir Dam New Haven County | 61 | 1929 | High | Satisfactory |
| Mercers Pond Dam Fairfield County | 20 | 1870 | High | Satisfactory |
| Merimere Reservoir Dam (Dike Is 8030) Hartford County | 33 | 1870 | Significant | Satisfactory |
| Merriman Pond Dam Litchfield County | 16 | 1900 | High | Satisfactory |
| Merry Acres Dam Litchfield County | 10 | 1938 | Significant | Satisfactory |
| Merten'S Mill Pond Dam Fairfield County | 8 | — | Significant | Not Rated |
| Messerschmidt Pond Dam Middlesex County | 23 | 1890 | High | Fair |
| Metcalf Brook Dam Tolland County | 8 | — | Significant | Not Rated |
| Mianus Filter Plant Dam Fairfield County | 31 | 1875 | High | Fair |
| Mianus River Dam Fairfield County | 20 | 1920 | Significant | Satisfactory |
| Middle Bolton Lake Dam Tolland County | 20 | 1940 | Significant | Satisfactory |
| Middle Hillhouse Road Pond Dam New Haven County | 14 | — | Significant | Fair |
| Middle Pond Dam and Dike Litchfield County | 10 | 1900 | Significant | Poor |
| Middle Reservoir Dam New Haven County | 35 | 1890 | Significant | Satisfactory |
| Middle Reservoir Dam Windham County | 7 | — | Significant | Not Rated |
| Migeon Pond Dam Litchfield County | 8 | 1974 | Significant | Not Rated |
| Milbrook Upper Lake Dam Fairfield County | 14 | — | Significant | Poor |
| Miles Pond Dam Litchfield County | 14 | 1920 | Low | Not Rated |
| Millard Pond Dam Fairfield County | 17 | — | Significant | Satisfactory |
| Miller Pond Dam New London County | 20 | 1873 | Significant | Satisfactory |
| 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 |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.