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 251–275 of 319
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sabrina Lake West Dike Norfolk County | 12 | 1870 | High | Unsatisfactory |
| Sandwash Reservoir Dam Berkshire County | 41 | 1936 | High | Poor |
| Schencks Pond Dam Middlesex County | 22 | 1940 | High | Satisfactory |
| Schoolhouse Lake Dam Berkshire County | 63 | 1986 | High | Satisfactory |
| Scott Reservoir Dam Worcester County | 40 | 1875 | High | Poor |
| Shaker Mill Pond Dam Berkshire County | 18 | 1910 | High | Satisfactory |
| Sherman Franklin County | 110 | 1927 | High | Satisfactory |
| Smelt Brook Dam Norfolk County | 15 | 1975 | High | Satisfactory |
| Snows Mill Pond Dam Worcester County | 28 | — | High | Satisfactory |
| Somerset Reservoir Dam Bristol County | 48 | 1965 | High | Fair |
| South Reservoir Dam Middlesex County | 45 | 1882 | High | Poor |
| South Reservoir East Dike Middlesex County | 15 | 1882 | High | Satisfactory |
| South Silver Dam Berkshire County | 31 | 1967 | High | Satisfactory |
| Spring Pond Dam Essex County | 15 | — | High | Fair |
| Squannacook River Dam Middlesex County | 18 | — | High | Fair |
| Stevens Pond Dam Worcester County | 30 | 1864 | High | Poor |
| Stevens Pond Outlet Dam Essex County | 19 | 1877 | High | Fair |
| Stiles Lake Dam Worcester County | 32 | 1865 | High | Satisfactory |
| Stockbridge Bowl Dam Berkshire County | 19 | 1880 | High | Poor |
| Stony Brook Reservoir Dam Middlesex County | 32 | 1887 | High | Satisfactory |
| Strangman Pond Dam Essex County | 16 | 1884 | High | Fair |
| Sudbury Reservoir Dam Worcester County | 77 | 1899 | High | Satisfactory |
| Sugden Reservoir Dam Worcester County | 34 | 1882 | High | Satisfactory |
| Suntaug Lake Dam Essex County | 17 | 1971 | High | Fair |
| Terry Brook Reservoir Dam Bristol County | 26 | — | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.