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 276–300 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Smith Mill Pond Dam Worcester County | 15 | — | Significant | Fair |
| Smelt Brook Dam Norfolk County | 15 | 1975 | High | Satisfactory |
| Smalley Bog Reservoir Dam Plymouth County | 7 | — | Low | Not Rated |
| Sluice Pond Dam Essex County | 12 | 1900 | Low | Poor |
| Slaters Pond Dam Worcester County | 22 | 2004 | Significant | Satisfactory |
| Singletary Pond Dam Worcester County | 17 | — | Significant | Fair |
| Simonds Pond Dam Worcester County | 32 | — | Significant | Satisfactory |
| Silver Lake Dam Plymouth County | 8 | 1908 | Low | Fair |
| Silver Lake Dam Norfolk County | 10 | — | Significant | Fair |
| Silver Lake Dam Worcester County | 16 | 1896 | Significant | Fair |
| Silver Lake Dam Hampden County | 15 | 1878 | Significant | Satisfactory |
| Silk Mill Dam Middlesex County | 20 | 1912 | Low | Fair |
| Sidneys Pond Dam Essex County | 8 | — | Significant | Poor |
| Shovel Shop Pond Dam Bristol County | 9 | 1813 | Low | Fair |
| Sherman Franklin County | 110 | 1927 | High | Satisfactory |
| Shepard Street Dam Norfolk County | 11 | 1956 | Significant | Satisfactory |
| Shepard Pond Dam Norfolk County | 16 | 1880 | Significant | Satisfactory |
| Sheomet Lake Dam Franklin County | 16 | — | Significant | Fair |
| Shelburne Falls Fire District Reservoir Dam Franklin County | 28 | 1921 | Significant | Fair |
| Shawville Pond Dam Hampden County | 13 | — | Significant | Satisfactory |
| Sharkey Pond Dam Berkshire County | 25 | — | Low | Poor |
| Shaker Mill Pond Dam Berkshire County | 15 | — | Significant | Fair |
| Shaker Mill Pond Dam Berkshire County | 18 | 1910 | High | Satisfactory |
| Shad Factory Pond Dam Bristol County | 12 | 1911 | Significant | Fair |
| Secret Lake Dam Worcester County | 16 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.