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 1076–1100 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Collins Pond Dam Essex County | 13 | 1930 | Significant | Satisfactory |
| Collins Hampden County | 11 | 1984 | Low | Satisfactory |
| Coles Brook Pond Dam Berkshire County | 11 | 1959 | Low | Fair |
| Cole River Dam Bristol County | 11 | — | Low | Fair |
| Cold Harbor Brook Dam Worcester County | 22 | 1962 | High | Satisfactory |
| Cold Bottom Pond Dam Plymouth County | 12 | 1900 | Low | Poor |
| Colburn Street Dam Norfolk County | 11 | — | Significant | Satisfactory |
| Cohasse Brook Reservoir Dam Worcester County | 60 | 1967 | High | Satisfactory |
| Cogan Pond Dam Worcester County | 25 | — | Low | Poor |
| Coes Reservoir Dam Worcester County | 21 | 1865 | High | Satisfactory |
| Coes Lower Pond Dam Worcester County | 15 | 1865 | Significant | Fair |
| Cochran Dam Norfolk County | 13 | 1900 | Low | Fair |
| Cochichewick River Dam Essex County | 13 | 1820 | Significant | Unsatisfactory |
| Cocassett Lake Dam Norfolk County | 16 | 1813 | Significant | Fair |
| Cobbs Pond Dam Norfolk County | 12 | — | High | Fair |
| Cobble Mountain Reservoir Dam Hampden County | 245 | 1930 | High | Satisfactory |
| Coachlace Pond Dam Worcester County | 13 | 1846 | Significant | Fair |
| Cloverdale Pond Dam Worcester County | 7 | — | Low | Not Rated |
| Clock Tower Dam Middlesex County | 20 | 1890 | Significant | Satisfactory |
| Cleveland Brook Reservoir Dam Berkshire County | 71 | 1949 | High | Satisfactory |
| Clear Pond West Dike Hampden County | 19 | — | Low | Poor |
| Clear Pond Dam Hampden County | 22 | — | Low | Poor |
| Clark Reservoir Dam Worcester County | 16 | 1920 | Significant | Poor |
| Clam Lake Dam Berkshire County | 97 | 1977 | High | Fair |
| City Mills Pond Dam Norfolk County | 19 | 1935 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.