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 1101–1125 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Thirty Acre Pond Dam Plymouth County | 12 | 1936 | High | Fair |
| Thompson Lake Dam Hampden County | 13 | 1900 | Low | Fair |
| Thompson Pond Dam Worcester County | 25 | — | Significant | Poor |
| Thousand Acre Lake Dam Berkshire County | 32 | 1960 | High | Fair |
| Thousand Acre Reservoir Dam Worcester County | 27 | 1939 | Low | Fair |
| Threemile Pond Dam Berkshire County | 17 | 1968 | Significant | Fair |
| Three Mile River Dam Bristol County | 13 | — | Significant | Fair |
| Three Mile River No. 1 Dam Bristol County | 13 | — | Significant | Fair |
| Tighe Carmody Reservoir Dam Hampshire County | 130 | 1955 | High | Satisfactory |
| Tihonet Pond No. 1 Dam Plymouth County | 16 | — | Significant | Fair |
| Tihonet Pond No. 2 Dam Plymouth County | 26 | — | Significant | Satisfactory |
| Tisdale Pond Dam Bristol County | 11 | 1770 | Significant | Fair |
| Towne Pond Dam Essex County | 14 | 1975 | Low | Poor |
| Town Farm Pond Dam Worcester County | 11 | — | Significant | Fair |
| Townsend Harbor Dam Middlesex County | 11 | 1870 | Significant | Satisfactory |
| Tremont Mill Pond Plymouth County | 15 | 1845 | High | Unsatisfactory |
| Tremont Street Dam Plymouth County | 12 | — | Significant | Fair |
| Triphammer Pond Dam Plymouth County | 11 | 1996 | Low | Poor |
| Trout Pond Dam Hampden County | 11 | 1920 | Low | Unsatisfactory |
| Trowel Shop Pond Dam Norfolk County | 11 | — | Low | Poor |
| Tully Dam Worcester County | 59 | 1949 | High | Not Available |
| Tully Pond Dam Franklin County | 20 | — | Significant | Fair |
| Tupperware Worcester County | 12 | 1904 | Low | Satisfactory |
| Turner Pond Dam Bristol County | 14 | — | Significant | Fair |
| Turner Pond Dam Norfolk County | 10 | 1800 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.