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 351–375 of 441
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Deerfield No. 5 Franklin County | 32 | 1992 | Low | Satisfactory |
| Deerfield No. 4 - Forebay Franklin County | 20 | 1912 | Low | Satisfactory |
| Deerfield No. 3 - Forebay Franklin County | 23 | 1912 | Low | Satisfactory |
| Deerfield No. 2 Franklin County | 76 | 1913 | Low | Satisfactory |
| Dean Pond Dam Hampden County | 21 | 1933 | Significant | Satisfactory |
| Dean Pond Dam Worcester County | 8 | — | Significant | Satisfactory |
| Day Street Dam Worcester County | 17 | 1900 | Significant | Satisfactory |
| Dark Brook Reservoir Dike A Worcester County | 11 | 1950 | High | Satisfactory |
| Dark Brook Reservoir Dam Worcester County | 17 | 1950 | High | Satisfactory |
| Curtis Ponds Dam Worcester County | 14 | 1837 | Significant | Satisfactory |
| Crystal Lake Dam Essex County | 8 | 1930 | Significant | Satisfactory |
| Crow Hills Pond Dam Worcester County | 16 | 1937 | Significant | Satisfactory |
| Crooked Pond Dam Hampshire County | 14 | — | Significant | Satisfactory |
| Crocker Pond Dam Worcester County | 39 | 1933 | High | Satisfactory |
| Cresticon Upper Worcester County | 12 | 1931 | Low | Satisfactory |
| Cresticon Lower Worcester County | 6 | 1948 | Significant | Satisfactory |
| Crescent Street Worcester County | 28 | 1900 | Significant | Satisfactory |
| Crane Brook Upper Dam Plymouth County | 11 | — | Significant | Satisfactory |
| Cranberry Reservoir Dam Bristol County | 7 | 1920 | Low | Satisfactory |
| Cranberry Pond Dam Hampden County | 24 | 1966 | Low | Satisfactory |
| Cranberry Bog Dam Middlesex County | 8 | 1920 | Low | Satisfactory |
| Cournoyer Pond Dam Worcester County | 14 | — | Low | Satisfactory |
| Conway Reservoir Dam Franklin County | 65 | 1975 | High | Satisfactory |
| Conway Recreation Dam Franklin County | 20 | 1949 | Significant | Satisfactory |
| Constance M. Fiske Flood Retarding Dam Middlesex County | 28 | 1984 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.