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 26–50 of 319
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Wallace Pond Dam Essex County | 22 | 1850 | High | Fair |
| Waldo Lake Dam Plymouth County | 18 | 1936 | High | Fair |
| Walden Pond Outlet Dam Essex County | 43 | 1890 | High | Fair |
| Walden Pond East End Dam Essex County | 8 | 1890 | High | Fair |
| Wachusett Reservoir South Dike Worcester County | 45 | 1906 | High | Satisfactory |
| Wachusett Reservoir North Dike Worcester County | 85 | 1904 | High | Satisfactory |
| Wachusett Reservoir Dam Worcester County | 114 | 1906 | High | Satisfactory |
| Upper Stoneville Reservoir Dam Worcester County | 27 | — | High | Satisfactory |
| Upper Sackett Reservoir Dam Berkshire County | 76 | 1947 | High | Satisfactory |
| Upper Root Reservoir Dam Berkshire County | 36 | 1960 | High | Satisfactory |
| Upper Merino Pond Dam Worcester County | 20 | — | High | Fair |
| Upper Highland Lake Dam Hampshire County | 27 | 1872 | High | Satisfactory |
| Upper Banjo Pond Dam Essex County | 17 | 1908 | High | Poor |
| Tyler Dam Middlesex County | 34 | 1965 | High | Satisfactory |
| Tully Dam Worcester County | 59 | 1949 | High | Not Available |
| Tremont Mill Pond Plymouth County | 15 | 1845 | High | Unsatisfactory |
| Tighe Carmody Reservoir Dam Hampshire County | 130 | 1955 | High | Satisfactory |
| Thousand Acre Lake Dam Berkshire County | 32 | 1960 | High | Fair |
| Thirty Acre Pond Dam Plymouth County | 12 | 1936 | High | Fair |
| Terry Brook Reservoir Dam Bristol County | 26 | — | High | Satisfactory |
| Suntaug Lake Dam Essex County | 17 | 1971 | High | Fair |
| Sugden Reservoir Dam Worcester County | 34 | 1882 | High | Satisfactory |
| Sudbury Reservoir Dam Worcester County | 77 | 1899 | High | Satisfactory |
| Strangman Pond Dam Essex County | 16 | 1884 | High | Fair |
| Stony Brook Reservoir Dam Middlesex County | 32 | 1887 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.