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 376–400 of 441
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sudbury Reservoir Dam Worcester County | 77 | 1899 | High | Satisfactory |
| Sugden Reservoir Dam Worcester County | 34 | 1882 | High | Satisfactory |
| Sunset Lake Dam Worcester County | 12 | 1900 | Low | Satisfactory |
| Swansea Dam Bristol County | 13 | — | Significant | Satisfactory |
| Tannery Pond Worcester County | 10 | 1936 | Low | Satisfactory |
| Terry Brook Reservoir Dam Bristol County | 26 | — | High | Satisfactory |
| Tighe Carmody Reservoir Dam Hampshire County | 130 | 1955 | High | Satisfactory |
| Tihonet Pond No. 2 Dam Plymouth County | 26 | — | Significant | Satisfactory |
| Townsend Harbor Dam Middlesex County | 11 | 1870 | Significant | Satisfactory |
| Tupperware Worcester County | 12 | 1904 | Low | Satisfactory |
| Turner Pond Dam Norfolk County | 10 | 1800 | Significant | Satisfactory |
| Turners Falls Dike Franklin County | 10 | 1905 | Low | Satisfactory |
| Tuxbury Pond Dam Essex County | 10 | 1929 | Significant | Satisfactory |
| Tyler Dam Middlesex County | 34 | 1965 | High | Satisfactory |
| Unquomonk Upper Reservoir Dam Hampshire County | 27 | 1903 | Low | Satisfactory |
| Upper Artichoke Reservoir Dam Essex County | 15 | 1920 | Low | Satisfactory |
| Upper Glen Reservoir Dam Franklin County | 59 | 1904 | Significant | Satisfactory |
| Upper Highland Lake Dam Hampshire County | 27 | 1872 | High | Satisfactory |
| Upper Highland Lake Dike Hampshire County | 15 | 1872 | Significant | Satisfactory |
| Upper Mystic Lake Dam Middlesex County | 16 | 1860 | Significant | Satisfactory |
| Upper Naukeag Lake Dam Worcester County | 8 | 1875 | Significant | Satisfactory |
| Upper Root Reservoir Dam Berkshire County | 36 | 1960 | High | Satisfactory |
| Upper Sackett Reservoir Dam Berkshire County | 76 | 1947 | High | Satisfactory |
| Upper Shawme Lake Dam Barnstable County | 12 | — | Significant | Satisfactory |
| Upper Stoneville Reservoir Dam Worcester County | 27 | — | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.