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 76–100 of 616
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Upper Flannagan Pond Dam Middlesex County | 9 | 1955 | Significant | Poor |
| Upper Crow Hills Pond Dam Worcester County | 11 | 1956 | Significant | Fair |
| Unionville Pond Dam Worcester County | 21 | 1909 | Significant | Fair |
| Tuxbury Pond Dam Essex County | 10 | 1929 | Significant | Satisfactory |
| Turnpike Lake North Dam Norfolk County | 9 | — | Significant | Poor |
| Turner Pond Dam Bristol County | 14 | — | Significant | Fair |
| Turner Pond Dam Norfolk County | 10 | 1800 | Significant | Satisfactory |
| Tully Pond Dam Franklin County | 20 | — | Significant | Fair |
| Tremont Street Dam Plymouth County | 12 | — | Significant | Fair |
| Townsend Harbor Dam Middlesex County | 11 | 1870 | Significant | Satisfactory |
| Town Farm Pond Dam Worcester County | 11 | — | Significant | Fair |
| Tisdale Pond Dam Bristol County | 11 | 1770 | Significant | Fair |
| Tihonet Pond No. 2 Dam Plymouth County | 26 | — | Significant | Satisfactory |
| Tihonet Pond No. 1 Dam Plymouth County | 16 | — | Significant | Fair |
| Three Mile River No. 1 Dam Bristol County | 13 | — | Significant | Fair |
| Three Mile River Dam Bristol County | 13 | — | Significant | Fair |
| Threemile Pond Dam Berkshire County | 17 | 1968 | Significant | Fair |
| Thompson Pond Dam Worcester County | 25 | — | Significant | Poor |
| Talbot Mills Dam Middlesex County | 16 | 1828 | Significant | Fair |
| Sylvia Place Pond Dam Plymouth County | 20 | — | Significant | Poor |
| Sylvestri Pond Dam Worcester County | 7 | — | Significant | Fair |
| Swans Pond Dam Worcester County | 12 | 1848 | Significant | Fair |
| Swansea Dam Bristol County | 13 | — | Significant | Satisfactory |
| Sutton Falls Dam Worcester County | 18 | 1900 | Significant | Fair |
| Sunset Lake Dam Norfolk County | 10 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.