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 26–50 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Willow Street Bypass Dam Norfolk County | 12 | — | Low | Poor |
| Willow Mill Dam Berkshire County | 24 | 1872 | Significant | Satisfactory |
| Williamsville Pond Dam South Worcester County | 17 | — | Low | Poor |
| Williamsville Pond Dam North Worcester County | 12 | — | Low | Poor |
| Williamstown Reservoir Dam Berkshire County | 32 | 1898 | High | Satisfactory |
| Willett Pond Dam Norfolk County | 25 | 1913 | High | Poor |
| Wildwood Lake Dam Worcester County | 23 | 1963 | Significant | Fair |
| Wild Acres Pond No. 2 Dam Berkshire County | 8 | 1970 | Low | Unsatisfactory |
| Whitney Pond Dam Worcester County | 18 | — | Significant | Poor |
| Whitney Pond Dam Worcester County | 27 | 1880 | High | Poor |
| Whitmore Pond Dam Franklin County | 16 | 1967 | Significant | Poor |
| Whitmans Pond Dam Norfolk County | 15 | — | High | Satisfactory |
| Whitin Reservoir Dam Worcester County | 33 | 1854 | High | Satisfactory |
| Whitin Pond Dam Worcester County | 14 | 1900 | Significant | Poor |
| Whiting Street Reservoir Dam Hampden County | 19 | 1900 | High | Fair |
| Whiting Pond Dam Bristol County | 10 | 1959 | High | Satisfactory |
| Whites Pond Dam Franklin County | 10 | 1940 | Low | Fair |
| White Reservoir Dam Hampshire County | 51 | 1912 | Significant | Fair |
| White Pond Dam Worcester County | 14 | 1923 | Low | Satisfactory |
| White Lily Pond Dam Berkshire County | 10 | 1965 | Low | Fair |
| White Island Pond Dam Plymouth County | 11 | — | Significant | Poor |
| Whitehall Upper Pond Dam Middlesex County | 10 | — | Significant | Poor |
| Whitehall Reservoir Distribution Dam Middlesex County | 15 | — | Significant | Satisfactory |
| Whitehall Reservoir Dam Middlesex County | 8 | — | Significant | Satisfactory |
| Whitehall Pond Dam Worcester County | 22 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.