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 126–150 of 319
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Muddy Cove Pond Dam Bristol County | 32 | 1950 | High | Fair |
| Mount Williams Reservoir Dam & Dike Berkshire County | 40 | 1914 | High | Poor |
| 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 |
| Mountain Lake Dam Hampden County | 32 | 1923 | High | Satisfactory |
| Moulton Pond Dam Worcester County | 16 | — | High | Unsatisfactory |
| Morse Pond Dam Bristol County | 9 | 1920 | High | Poor |
| Morey'S Bridge Dam Bristol County | 13 | 1832 | High | Satisfactory |
| Moose Hill Reservoir Dam Worcester County | 71 | 1980 | High | Satisfactory |
| Moody Street Dam Middlesex County | 22 | 1847 | High | Fair |
| Monument Pond Dam Bristol County | 10 | — | High | Unsatisfactory |
| Millvale Reservoir Dam Essex County | 18 | 1898 | High | Fair |
| Mill Pond South Dike Middlesex County | 39 | 1973 | High | Satisfactory |
| Mill Pond Dam Plymouth County | 17 | 1850 | High | Poor |
| Mill Pond Dam Middlesex County | 50 | 1973 | High | Satisfactory |
| Mill Pond Dam Middlesex County | 14 | 1900 | High | Fair |
| Middle Roberts Meadow Reservoir Dam Hampshire County | 36 | 1894 | High | Fair |
| Mare Meadow Reservoir Dam Worcester County | 47 | 1955 | High | Fair |
| Marcalus Manufacturing Company Dam Hampshire County | 27 | — | High | 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 |
| 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.