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 426–450 of 464
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Walden Pond Outlet Dam Essex County | 43 | 1890 | High | Fair |
| Waldo Lake Dam Plymouth County | 18 | 1936 | High | Fair |
| Wallace Pond Dam Essex County | 22 | 1850 | High | Fair |
| Wallis Pond Dam Worcester County | 8 | 1900 | Low | Fair |
| Wards Pond Dam Hampden County | 20 | 1892 | Significant | Fair |
| War Memorial Park Dam Plymouth County | 9 | 1900 | Low | Fair |
| Washington Street Dam Middlesex County | 16 | — | Significant | Fair |
| Waste Water Treatment Plant Dam Worcester County | 26 | — | Low | Fair |
| Watertown Dam Middlesex County | 10 | — | Significant | Fair |
| Waterville Pond Dam Plymouth County | 17 | 1920 | Significant | Fair |
| Watson Pond Dam Bristol County | 9 | — | Significant | Fair |
| Webster Lake Dam Worcester County | 15 | 1957 | Significant | Fair |
| Wedge Pond Dam Middlesex County | 9 | 1900 | Low | Fair |
| West End Beagle Club Dam Worcester County | 13 | 1961 | Significant | Fair |
| Westfield Reservoir Dam Hampden County | 41 | 1874 | High | Fair |
| Westford Depot Dam Middlesex County | 12 | — | Significant | Fair |
| Westinghouse Dam Suffolk County | 15 | — | Significant | Fair |
| West Meadow Pond Dam Plymouth County | 10 | 1965 | Significant | Fair |
| Westminster Reservoir Dam Worcester County | 31 | 1909 | High | Fair |
| West Parish Filter No. 1 Dam Hampden County | 28 | 1924 | Significant | Fair |
| West Parish Filter No. 3 Dam Hampden County | 39 | 1910 | High | Fair |
| West Warren Mill Pond Dam Worcester County | 19 | 1900 | Low | Fair |
| West Whately Reservoir Dam Franklin County | 23 | 1903 | High | Fair |
| Wheeler Pond Dam Hampden County | 17 | 1956 | Significant | Fair |
| White Lily Pond Dam Berkshire County | 10 | 1965 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.