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 276–300 of 464
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mirror Lake Dam Norfolk County | 6 | — | Significant | Fair |
| Moody Street Dam Middlesex County | 22 | 1847 | High | Fair |
| Moores Pond Dam Franklin County | 8 | 2010 | Low | Fair |
| Mountain Street Reservoir Dam Hampshire County | 33 | 1902 | High | Fair |
| Mount Holyoke College Lower Pond Dam Hampshire County | 24 | 1936 | High | Fair |
| Mount Holyoke College Upper Pond Dam Hampshire County | 20 | — | High | Fair |
| Mount Pleasant Pond Dam Worcester County | 13 | 1967 | Significant | Fair |
| Muddy Cove Pond Dam Bristol County | 32 | 1950 | High | Fair |
| Nabnasset Pond Dam Middlesex County | 14 | 1926 | Significant | Fair |
| Naultaug Brook Pond Dam Worcester County | 18 | — | Significant | Fair |
| Nemasket Park Dam Plymouth County | 23 | 1964 | Significant | Fair |
| New Bedford Reservoir Dam Bristol County | 10 | 1867 | Significant | Fair |
| New Pond Dam Worcester County | 18 | — | Significant | Fair |
| New Pond Dam Bristol County | 16 | 1810 | Significant | Fair |
| Newton Reservoir Dam Worcester County | 30 | 1903 | Low | Fair |
| Niskayuna Pond Dam Berkshire County | 25 | — | Low | Fair |
| Noquochoke Lake Dam Bristol County | 14 | 1854 | High | Fair |
| North Harwich Reservoir Dam Barnstable County | 8 | 1880 | Low | Fair |
| North Silver Lake Dam Berkshire County | 76 | — | High | Fair |
| North Watuppa Pond Dam Bristol County | 11 | 1963 | High | Fair |
| Norumbega Reservoir Dam No. 1 Middlesex County | 42 | 1940 | High | Fair |
| Notown Reservoir Dam Worcester County | 26 | 1876 | High | Fair |
| Notown Reservoir Dike Worcester County | 25 | 1876 | High | Fair |
| Old Grist Mill Pond Dam Worcester County | 19 | 1953 | Significant | Fair |
| Old Shepard Pond Dam Worcester County | 7 | — | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.