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 201–225 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Swansea Dam Bristol County | 13 | — | Significant | Satisfactory |
| Sutton Falls Dam Worcester County | 18 | 1900 | Significant | Fair |
| Suntaug Lake Dam Essex County | 17 | 1971 | High | Fair |
| Sunset Lake Dam Worcester County | 12 | 1900 | Low | Satisfactory |
| Sunset Lake Dam Norfolk County | 10 | — | Significant | Poor |
| Summit Pond Dam Worcester County | 10 | — | Significant | Fair |
| Sugden Reservoir Dam Worcester County | 34 | 1882 | High | Satisfactory |
| Sudbury River Dam Middlesex County | 7 | — | Low | Poor |
| Sudbury Reservoir Dam Worcester County | 77 | 1899 | High | Satisfactory |
| Sucker Brook Dam Worcester County | 27 | — | Significant | Satisfactory |
| Stump Pond Dam Plymouth County | 9 | 1900 | Significant | Unsatisfactory |
| Stump Pond Dam Worcester County | 8 | 1900 | Significant | Poor |
| Studleys Pond Dam Plymouth County | 15 | — | Significant | Poor |
| Stuart Pond Dam Worcester County | 10 | 1928 | Low | Poor |
| Stringer Dam Worcester County | 8 | 1900 | Low | Fair |
| Streeter Pond Dam Worcester County | 12 | 1920 | Low | Poor |
| Strangman Pond Dam Essex County | 16 | 1884 | High | Fair |
| Straits Pond Dam Norfolk County | 12 | 1908 | Significant | Satisfactory |
| Store Pond Dam Plymouth County | 5 | — | Significant | Satisfactory |
| Stony Brook Reservoir Dam Middlesex County | 32 | 1887 | High | Satisfactory |
| Stony Brook Pond Dam Plymouth County | 10 | 2010 | Significant | Poor |
| Stony Brook Dam Middlesex County | 24 | 1870 | Significant | Fair |
| Stodge Meadow Pond Dam Worcester County | 15 | 1863 | Low | Fair |
| Stoddard Pond Dam Worcester County | 8 | 1920 | Low | Satisfactory |
| Stocking Mill Dam Worcester County | 8 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.