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 1–25 of 464
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Accord Pond Dam Plymouth County | 10 | — | Significant | Fair |
| Adams Pond Dam Worcester County | 7 | — | Significant | Fair |
| Aldrich Lake Dam Hampshire County | 34 | 1934 | Significant | Fair |
| Allen Dam Middlesex County | 15 | 1797 | Low | Fair |
| Allen Mill Pond Dam Worcester County | 18 | — | Significant | Fair |
| Alum Pond Dam Worcester County | 9 | — | Significant | Fair |
| Ames Pond Dam Bristol County | 10 | 1920 | Low | Fair |
| Ames Pond Dam Plymouth County | 15 | 1992 | Significant | Fair |
| Ames Pond Dam Middlesex County | 11 | — | High | Fair |
| Arlington Reservoir Dam Middlesex County | 14 | 1872 | High | Fair |
| Ashby Reservoir Dam Middlesex County | 28 | 1918 | Significant | Fair |
| Asnacomet Pond Dam Worcester County | 9 | — | Significant | Fair |
| Asnebumskit Pond Dam Worcester County | 11 | 1950 | Significant | Fair |
| Assabet River Dam Worcester County | 11 | — | Significant | Fair |
| Atkins Reservoir Dam Franklin County | 33 | 1930 | High | Fair |
| Atkins Reservoir Dike Franklin County | 20 | 1932 | Low | Fair |
| Atwater Pond Dam Berkshire County | 12 | 1890 | Low | Fair |
| Ballardvale Dam Essex County | 14 | 1753 | Significant | Fair |
| Barbieri Pond Dam Berkshire County | 20 | 1968 | Low | Fair |
| Bare Hill Pond Dam Worcester County | 9 | 1837 | Significant | Fair |
| Bartlett Pond Dam Worcester County | 19 | 1885 | Low | Fair |
| Bassett Brook Reservoir Dam Berkshire County | 29 | 1967 | Significant | Fair |
| Bear Brook Dam Worcester County | 12 | — | Significant | Fair |
| Beaumont Pond Dam Norfolk County | 11 | 1886 | Low | Fair |
| Belmont Reservoir Dam Berkshire County | 29 | 1889 | High | Fair |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.