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 576–600 of 616
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Watson Pond Dam Bristol County | 9 | — | Significant | Fair |
| Wayside Pond Dam Worcester County | 8 | 1964 | Significant | Unsatisfactory |
| Webster Lake Dam Worcester County | 15 | 1957 | Significant | Fair |
| Wee Laddie Pond Dam Worcester County | 6 | 1974 | Significant | Satisfactory |
| Wequaquet Lake Dam Barnstable County | 8 | — | Significant | Satisfactory |
| West End Beagle Club Dam Worcester County | 13 | 1961 | Significant | Fair |
| Westfield Sportsman'S Club Dam Hampden County | 10 | 1955 | Significant | Satisfactory |
| 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 |
| West Parish Filter No. 1 Dam Hampden County | 28 | 1924 | Significant | Fair |
| West Parish Filter No. 2 Dam Hampden County | 30 | 1910 | Significant | Poor |
| West Pond Outlet Dam Essex County | 13 | 1872 | Significant | Unsatisfactory |
| West River Pond Dam Worcester County | 15 | 1920 | Significant | Poor |
| West Street Dam Norfolk County | 12 | — | Significant | Satisfactory |
| Wetmore Pond Dam Worcester County | 16 | — | Significant | Poor |
| Weymouth Great Pond Dam Norfolk County | 10 | 1884 | Significant | Satisfactory |
| Wheeler Pond Dam Hampden County | 17 | 1956 | Significant | Fair |
| Wheeler Pond Dam Worcester County | 11 | — | Significant | Unsatisfactory |
| Whitehall Pond Dam Worcester County | 22 | — | Significant | Poor |
| Whitehall Reservoir Dam Middlesex County | 8 | — | Significant | Satisfactory |
| Whitehall Reservoir Distribution Dam Middlesex County | 15 | — | Significant | Satisfactory |
| Whitehall Upper Pond Dam Middlesex County | 10 | — | Significant | Poor |
| White Island Pond Dam Plymouth County | 11 | — | Significant | Poor |
| White Reservoir Dam Hampshire County | 51 | 1912 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.