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 601–625 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mauserts Pond Dam Berkshire County | 14 | 1998 | Significant | Fair |
| Mattapoisett River Dam Plymouth County | 10 | 1898 | Significant | Satisfactory |
| Massapoag Pond Dam Middlesex County | 14 | — | Significant | Fair |
| Massapoag Lake Dam Norfolk County | 7 | — | Significant | Satisfactory |
| Mason Road Dam Middlesex County | 11 | 1870 | Low | Poor |
| Mashpee River Fishway Dam Barnstable County | 12 | — | Significant | Poor |
| Mare Meadow Reservoir Dam Worcester County | 47 | 1955 | High | Fair |
| Marcalus Manufacturing Company Dam Hampshire County | 27 | — | High | Fair |
| Marble Pond Dam Worcester County | 10 | 1985 | Low | Fair |
| Maple Street Dam Bristol County | 21 | — | Significant | Fair |
| Maple Springs Road Dam Plymouth County | 14 | — | Low | Not Rated |
| Maple Springs Brook No. 1 Dam Plymouth County | 12 | 1911 | Low | Not Rated |
| Maple Spring Pond Dam Worcester County | 6 | 1885 | Significant | Fair |
| Maple Spring No. 2 Dam Plymouth County | 11 | — | Low | Not Rated |
| Manns Pond Dam Norfolk County | 14 | — | Significant | Fair |
| Manhan River Dam Hampshire County | 16 | 1998 | Significant | Fair |
| Manchester Pond Reservoir South Dike Bristol County | 16 | 1963 | High | Poor |
| Manchester Pond Reservoir East Dike Bristol County | 12 | 1963 | High | Poor |
| Manchester Pond Reservoir Dam Bristol County | 28 | 1963 | High | Fair |
| Manchaug Pond Dam Worcester County | 28 | 1836 | High | Fair |
| Makepeace No. 4 Dam Plymouth County | 11 | 1900 | Low | Not Rated |
| Makepeace No. 3 Dam Plymouth County | 12 | — | Low | Not Rated |
| Makepeace No. 2 Dam Plymouth County | 10 | 1900 | Low | Not Rated |
| Makepeace No. 1 Dam Plymouth County | 9 | 1952 | Low | Not Rated |
| Main Street Dam Middlesex County | 18 | 1882 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.