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 701–725 of 1,225
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mill Pond Dam New London County | 8 | — | Low | Poor |
| Mill Pond Dam Hartford County | 19 | 1677 | Significant | Satisfactory |
| Mill Street Dam Hartford County | 17 | — | Significant | Fair |
| Miner Pond Dam Middlesex County | 5 | — | Significant | Not Rated |
| Minor Pond Dam Litchfield County | 9 | — | Significant | Not Rated |
| Mirror Lake Dam Tolland County | 12 | — | High | Poor |
| Mirror Lake Dam New Haven County | 20 | 1949 | Significant | Satisfactory |
| Miry Pond Dam #2 New Haven County | 14 | — | Significant | Not Rated |
| Mitchell Pond Dam New London County | 9 | — | Significant | Not Rated |
| Mixville Pond Dam New Haven County | 14 | 1870 | High | Satisfactory |
| Mohegan Brook Dam New London County | 5 | — | Significant | Satisfactory |
| Monce Pond Dam Hartford County | 8 | — | Significant | Not Rated |
| Mondo Pond #4 Dam New Haven County | 10 | — | Significant | Not Rated |
| Mono Pond Dam Tolland County | 13 | 1990 | Significant | Satisfactory |
| Moodus Reservoir Dam Middlesex County | 18 | 1882 | Significant | Satisfactory |
| Moody Reservoir Dam New Haven County | 56 | 1900 | High | Satisfactory |
| Moosup Pond Dam Windham County | 7 | 1970 | Significant | Fair |
| Morehouse Pond Dam Litchfield County | 6 | — | Significant | Not Rated |
| Morey Pond Dam Windham County | 19 | 1870 | Significant | Satisfactory |
| Morgan Pond Dam New London County | 45 | 1966 | Significant | Satisfactory |
| Morin Pond Dam #1 Litchfield County | 12 | — | Significant | Not Rated |
| Morin Pond Dam #2 Litchfield County | 13 | — | Significant | Not Rated |
| Morosani Pond #1 Dam Litchfield County | 18 | 1969 | Significant | Satisfactory |
| Morosani Pond #2 Dam Litchfield County | 18 | 1971 | Low | Not Rated |
| Morris Reservoir Dam Litchfield County | 70 | 1910 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.