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 226–250 of 464
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Long Pond Dam Middlesex County | 8 | 1900 | Low | Fair |
| Long Pond Dam Bristol County | 14 | — | Significant | Fair |
| Long Pond Dam Barnstable County | 7 | 1966 | Low | Fair |
| Lovell Reservoir Dam Worcester County | 84 | 1929 | High | Fair |
| Lovewell Pond Dam Worcester County | 12 | — | Low | Fair |
| Lowell Reservoir Dam Middlesex County | 26 | 1872 | High | Fair |
| Lowe Pond Outlet Dam Essex County | 10 | 1960 | Low | Fair |
| Lower Flint Pond Dam Middlesex County | 28 | — | Low | Fair |
| Lower Meadow Pond Dam Worcester County | 16 | — | Significant | Fair |
| Lower Merino Pond Dam Worcester County | 24 | 1850 | High | Fair |
| Lower Mill Pond Dam Hampshire County | 24 | — | Significant | Fair |
| Lower Naukeag Lake Dam Worcester County | 14 | 1900 | High | Fair |
| Lower Porter Pond Dam Plymouth County | 9 | 1940 | Significant | Fair |
| Lower Sandra Pond Dam Worcester County | 10 | 1991 | Significant | Fair |
| Lower Stoneville Pond Dam Worcester County | 15 | 1904 | High | Fair |
| Lunden Dam Hampden County | 10 | 1958 | Significant | Fair |
| Lynde Brook Reservoir Dike Worcester County | 17 | 1876 | High | Fair |
| Lynn Waterways Dam Essex County | 8 | 1915 | Low | Fair |
| Mahoney Pond Dam Worcester County | 9 | 1964 | Significant | Fair |
| Manchaug Pond Dam Worcester County | 28 | 1836 | High | Fair |
| Manchester Pond Reservoir Dam Bristol County | 28 | 1963 | High | Fair |
| Manhan River Dam Hampshire County | 16 | 1998 | Significant | Fair |
| Manns Pond Dam Norfolk County | 14 | — | Significant | Fair |
| Maple Spring Pond Dam Worcester County | 6 | 1885 | Significant | Fair |
| Maple Street Dam Bristol County | 21 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.