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 301–319 of 319
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Westminster Reservoir Dam Worcester County | 31 | 1909 | High | Fair |
| Weston Reservoir Dam Middlesex County | 45 | — | High | Satisfactory |
| West Parish Filter No. 3 Dam Hampden County | 39 | 1910 | High | Fair |
| Westville Dam Worcester County | 72 | 1962 | High | Not Available |
| West Whately Reservoir Dam Franklin County | 23 | 1903 | High | Fair |
| Whiting Pond Dam Bristol County | 10 | 1959 | High | Satisfactory |
| Whiting Street Reservoir Dam Hampden County | 19 | 1900 | High | Fair |
| Whitin Reservoir Dam Worcester County | 33 | 1854 | High | Satisfactory |
| Whitmans Pond Dam Norfolk County | 15 | — | High | Satisfactory |
| Whitney Pond Dam Worcester County | 27 | 1880 | High | Poor |
| Willett Pond Dam Norfolk County | 25 | 1913 | High | Poor |
| Williamstown Reservoir Dam Berkshire County | 32 | 1898 | High | Satisfactory |
| Windsor Lake Dam Berkshire County | 20 | 1883 | High | Fair |
| Windsor Reservoir Dam Berkshire County | 51 | 1865 | High | Satisfactory |
| Winnekeag Lake Dam Worcester County | 21 | 1878 | High | Fair |
| Winona Pond Dam Essex County | 23 | 1971 | High | Fair |
| Wright'S Pond Dam Middlesex County | 27 | — | High | Fair |
| Wrights Reservoir Dam Worcester County | 18 | 1965 | High | Satisfactory |
| Wyman Pond Compensating Reservoir Dam Worcester County | 25 | 1892 | High | Fair |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.