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 176–200 of 464
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| New Pond Dam Worcester County | 18 | — | Significant | Fair |
| New Pond Dam Bristol County | 16 | 1810 | Significant | Fair |
| New Bedford Reservoir Dam Bristol County | 10 | 1867 | Significant | Fair |
| Nemasket Park Dam Plymouth County | 23 | 1964 | Significant | Fair |
| Naultaug Brook Pond Dam Worcester County | 18 | — | Significant | Fair |
| Nabnasset Pond Dam Middlesex County | 14 | 1926 | Significant | Fair |
| Muddy Cove Pond Dam Bristol County | 32 | 1950 | High | Fair |
| Mount Pleasant Pond Dam Worcester County | 13 | 1967 | Significant | Fair |
| Mount Holyoke College Upper Pond Dam Hampshire County | 20 | — | High | Fair |
| Mount Holyoke College Lower Pond Dam Hampshire County | 24 | 1936 | High | Fair |
| Mountain Street Reservoir Dam Hampshire County | 33 | 1902 | High | Fair |
| Moores Pond Dam Franklin County | 8 | 2010 | Low | Fair |
| Moody Street Dam Middlesex County | 22 | 1847 | High | Fair |
| Mirror Lake Dam Norfolk County | 6 | — | Significant | Fair |
| Millvale Reservoir Dam Essex County | 18 | 1898 | High | Fair |
| Mill River Culvert and Tide Gate Essex County | 13 | — | Low | Fair |
| Mill Pond No. 1 Dam Worcester County | 19 | 1876 | Significant | Fair |
| Mill Pond Dam Worcester County | 12 | 1795 | Significant | Fair |
| Mill Pond Dam Bristol County | 10 | — | Significant | Fair |
| Mill Pond Dam Hampden County | 17 | 1892 | Low | Fair |
| Mill Pond Dam Middlesex County | 14 | 1900 | High | Fair |
| Mill Pond Dam Middlesex County | 16 | 1958 | Low | Fair |
| Mill Pond Dam Barnstable County | 7 | — | Significant | Fair |
| Mill Pond Dam Essex County | 8 | 1996 | Low | Fair |
| Mill Pond Dam Barnstable County | 13 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.