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 464
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| West End Beagle Club Dam Worcester County | 13 | 1961 | Significant | Fair |
| Wedge Pond Dam Middlesex County | 9 | 1900 | Low | Fair |
| Webster Lake Dam Worcester County | 15 | 1957 | Significant | Fair |
| Watson Pond Dam Bristol County | 9 | — | Significant | Fair |
| Waterville Pond Dam Plymouth County | 17 | 1920 | Significant | Fair |
| Watertown Dam Middlesex County | 10 | — | Significant | Fair |
| Waste Water Treatment Plant Dam Worcester County | 26 | — | Low | Fair |
| Washington Street Dam Middlesex County | 16 | — | Significant | Fair |
| War Memorial Park Dam Plymouth County | 9 | 1900 | Low | Fair |
| Wards Pond Dam Hampden County | 20 | 1892 | Significant | Fair |
| Wallis Pond Dam Worcester County | 8 | 1900 | Low | Fair |
| Wallace Pond Dam Essex County | 22 | 1850 | High | Fair |
| Waldo Lake Dam Plymouth County | 18 | 1936 | High | Fair |
| Walden Pond Outlet Dam Essex County | 43 | 1890 | High | Fair |
| Walden Pond East End Dam Essex County | 8 | 1890 | High | Fair |
| Wade Lake Dam Hampden County | 10 | — | Significant | Fair |
| Wachusett Lake Dam Worcester County | 4 | 1905 | Significant | Fair |
| Vorces Pond Dam Franklin County | 12 | 1892 | Significant | Fair |
| Vistron Dam Hampshire County | 25 | — | Significant | Fair |
| Vandy'S Pond Dam Norfolk County | 8 | — | Significant | Fair |
| Usmc Pond Upper Dam Essex County | 17 | 1904 | Significant | Fair |
| Upper Westborough Reservoir Dam Worcester County | 15 | 1887 | Significant | Fair |
| Upper Spectacle Pond Dam Berkshire County | 23 | 1935 | Low | Fair |
| Upper Sawmill Pond Dam Worcester County | 16 | 1850 | Significant | Fair |
| Upper Reservoir Dam Barnstable County | 7 | 1900 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.