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 356
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Ocean Spray Dam Plymouth County | 13 | — | Low | Not Rated |
| North Village Pond Worcester County | 13 | 1914 | Low | Satisfactory |
| North Harwich Reservoir Dam Barnstable County | 8 | 1880 | Low | Fair |
| Norcross Pond No. 3 Dam Hampden County | 16 | — | Low | Poor |
| Norcross Pond No. 2 Dam Hampden County | 19 | — | Low | Poor |
| Niskayuna Pond Dam Berkshire County | 25 | — | Low | Fair |
| Newton Reservoir Dam Worcester County | 30 | 1903 | Low | Fair |
| New Home Franklin County | 9 | 1936 | Low | Satisfactory |
| Neponset River Dam Norfolk County | 15 | 1850 | Low | Poor |
| Musketaquid Pond Upper Dam Middlesex County | 8 | 1900 | Low | Satisfactory |
| Muddy Pond Dam Plymouth County | 8 | 1900 | Low | Satisfactory |
| Mount Wayte Outlet Works Middlesex County | 7 | — | Low | Poor |
| Mountain Street Reservoir Dikes Hampshire County | 30 | 1905 | Low | Poor |
| Morse Pond Dam Worcester County | 9 | — | Low | Poor |
| Morse Pond Dam Worcester County | 9 | — | Low | Poor |
| Morley Swamp Dam Berkshire County | 9 | 1948 | Low | Satisfactory |
| Moores Pond Dam Franklin County | 8 | 2010 | Low | Fair |
| Mill River Culvert and Tide Gate Essex County | 13 | — | Low | Fair |
| Mill Pond Dam Essex County | 8 | 1996 | Low | Fair |
| Mill Pond Dam Middlesex County | 16 | 1958 | Low | Fair |
| Mill Pond Dam Hampden County | 17 | 1892 | Low | Fair |
| Milford Pond Dam Bristol County | 13 | 1900 | Low | Poor |
| Mile Brook Dam Essex County | 10 | — | Low | Unsatisfactory |
| Middleton Pond Outlet Dam Essex County | 12 | 1900 | Low | Fair |
| Merry Memorial Dam Plymouth County | 12 | 1910 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.