Massachusetts Dams
1,291 dams tracked by the National Inventory of Dams
Total Dams
1,291
High Hazard
319
24.7%
Poor / Unsatisfactory
336
Average Age
112 yrs
Hazard Classification
High319 (24.7%)
Significant616 (47.7%)
Low356 (27.6%)
Condition Assessment
Satisfactory441 (34.2%)
Fair464 (35.9%)
Poor / Unsatisfactory336 (26.0%)
Not Rated50 (3.9%)
Federal
15
State
211
Local
585
Private
451
Tallest Dams
- Cobble Mountain Reservoir Dam245 ft
- Quabbin Winsor Dam170 ft
- Littleville Dam164 ft
- Bear Swamp - North Dike 155 ft
- Knightville Dam150 ft
High Hazard Dams
Poor Condition Dams
All Dams in Massachusetts
Showing 201–225 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Cobble Mountain Reservoir Dam Hampden County | 245 | 1930 | High | Satisfactory |
| Cobbs Pond Dam Norfolk County | 12 | — | High | Fair |
| Cocassett Lake Dam Norfolk County | 16 | 1813 | Significant | Fair |
| Cochichewick River Dam Essex County | 13 | 1820 | Significant | Unsatisfactory |
| Cochran Dam Norfolk County | 13 | 1900 | Low | Fair |
| Coes Lower Pond Dam Worcester County | 15 | 1865 | Significant | Fair |
| Coes Reservoir Dam Worcester County | 21 | 1865 | High | Satisfactory |
| Cogan Pond Dam Worcester County | 25 | — | Low | Poor |
| Cohasse Brook Reservoir Dam Worcester County | 60 | 1967 | High | Satisfactory |
| Colburn Street Dam Norfolk County | 11 | — | Significant | Satisfactory |
| Cold Bottom Pond Dam Plymouth County | 12 | 1900 | Low | Poor |
| Cold Harbor Brook Dam Worcester County | 22 | 1962 | High | Satisfactory |
| Cole River Dam Bristol County | 11 | — | Low | Fair |
| Coles Brook Pond Dam Berkshire County | 11 | 1959 | Low | Fair |
| Collins Hampden County | 11 | 1984 | Low | Satisfactory |
| Collins Pond Dam Essex County | 13 | 1930 | Significant | Satisfactory |
| Collinsville Dam Middlesex County | 9 | 1850 | Significant | Poor |
| Colrain Lower Reservoir Dam Franklin County | 15 | 1902 | Significant | Fair |
| Columbia Mill Dam Berkshire County | 25 | 1901 | Significant | Poor |
| Comins Pond Dam Worcester County | 18 | 1957 | Significant | Fair |
| Conant Brook Dam Hampden County | 85 | 1966 | High | Not Available |
| Connor Pond Dam Worcester County | 11 | 1968 | Significant | Fair |
| Constance M. Fiske Flood Retarding Dam Middlesex County | 28 | 1984 | High | Satisfactory |
| Conway Electric Dam Franklin County | 77 | 1898 | Low | Poor |
| Conway Recreation Dam Franklin County | 20 | 1949 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.