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 426–450 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Perryville Pond Dam Worcester County | 13 | 1870 | Significant | Fair |
| Perley Brook Reservoir Dam Worcester County | 50 | 1962 | High | Satisfactory |
| Peppers Mill Pond Dam Hampshire County | 7 | 1953 | Low | Fair |
| Pepperell Paper Middlesex County | 24 | 1918 | High | Satisfactory |
| Pentucket Pond Outlet Dam Essex County | 9 | — | Significant | Satisfactory |
| Pelton Reservoir Dam Berkshire County | 16 | 1954 | Low | Fair |
| Pelham Lake Dam Franklin County | 14 | 1850 | Significant | Fair |
| Pecks Lower Pond Dam Berkshire County | 31 | 1877 | Significant | Poor |
| Patrill Hollow Pond Dam Worcester County | 11 | — | Low | Unsatisfactory |
| Patch Reservoir Dam Worcester County | 8 | 1896 | High | Satisfactory |
| Patch Pond Dam Worcester County | 14 | — | High | Unsatisfactory |
| Partridgeville Pond Dam Worcester County | 20 | 1938 | Significant | Satisfactory |
| Parsons Reservoir Dam Worcester County | 13 | — | Significant | Fair |
| Parker Pond Dam Worcester County | 20 | — | Significant | Fair |
| Parker Mills Pond Dam Plymouth County | 19 | — | High | Poor |
| Paradise Pond Dam Worcester County | 11 | — | Significant | Fair |
| Paradise Pond Dam Hampshire County | 29 | 1850 | High | Satisfactory |
| Paradise Lake Dam Hampden County | 8 | 1930 | Low | Satisfactory |
| Papoose Lake Upper Dam Franklin County | 12 | — | Significant | Poor |
| Palmer Upper Reservoir Dam Hampden County | 25 | 1930 | Significant | Satisfactory |
| Palmer Brook Dam Berkshire County | 34 | 1968 | High | Satisfactory |
| Paint Shop Pond Dam Norfolk County | 12 | 2002 | Low | Satisfactory |
| Packard Pond Dam Franklin County | 25 | — | Significant | Fair |
| Overlook Reservoir Dike Worcester County | 22 | 1871 | High | Fair |
| Overlook Reservoir Dam Worcester County | 41 | 1871 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.