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 301–325 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Searles Pond Dam Essex County | 8 | 1979 | Significant | Fair |
| Sealund Reservoir Dam Plymouth County | 14 | — | Significant | Poor |
| Scout Pond Dam Hampshire County | 15 | 1937 | Low | Satisfactory |
| Scott Reservoir Dam Worcester County | 40 | 1875 | High | Poor |
| Schoolhouse Pond Dam Worcester County | 8 | — | Significant | Poor |
| Schoolhouse Lake Dam Berkshire County | 63 | 1986 | High | Satisfactory |
| Schencks Pond Dam Middlesex County | 22 | 1940 | High | Satisfactory |
| Sawmill Pond Dam Worcester County | 11 | — | Significant | Fair |
| Sawdy Pond Dam Bristol County | 11 | 1938 | Significant | Poor |
| Sargent Pond Dam Worcester County | 15 | — | Significant | Satisfactory |
| Santuit Pond Dam Barnstable County | 8 | — | Significant | Satisfactory |
| Sanford Mill Pond Dam Norfolk County | 18 | 1881 | Significant | Poor |
| Sandwash Reservoir Dam Berkshire County | 41 | 1936 | High | Poor |
| Sand Pond Dam Barnstable County | 8 | — | Low | Not Rated |
| Salisbury Pond Dam Worcester County | 13 | 1953 | Significant | Satisfactory |
| Salem Pond Dam Essex County | 12 | 1930 | Low | Fair |
| Saint Yues Bog Dam Plymouth County | 8 | 1941 | Low | Not Rated |
| Sabrina Lake West Dike Norfolk County | 12 | 1870 | High | Unsatisfactory |
| Sabrina Lake South Dam Norfolk County | 7 | — | Significant | Fair |
| Sabrina Lake North Dam Norfolk County | 6 | — | Significant | Not Rated |
| Russells Mill Pond Dam Bristol County | 8 | — | Significant | Fair |
| Russell Pond Dam Plymouth County | 10 | — | Significant | Satisfactory |
| Russell Pond Dam Plymouth County | 16 | — | High | Unsatisfactory |
| Russell Pond Dam Hampden County | 10 | — | Significant | Fair |
| Russell Mill Pond Dam Middlesex County | 18 | 1954 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.