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 1201–1225 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Bleachery Dam Middlesex County | 8 | 1900 | Low | Satisfactory |
| Blackstone River Saranac Dam At Canal Street Worcester County | 13 | 1910 | Low | Fair |
| Blackstone River Dam Worcester County | 17 | — | Significant | Poor |
| Black Brook Pl-566 Flood Control Dam Hampden County | 60 | 1971 | High | Satisfactory |
| Bixby Reservoir Dam Middlesex County | 9 | 1950 | Low | Satisfactory |
| Bird Pond Dam Norfolk County | 19 | 1800 | High | Poor |
| Birch Pond Dam Essex County | 25 | 1873 | High | Fair |
| Birch Hill Dam Worcester County | 49 | 1942 | High | Not Available |
| Big Bearhole Pond Dam Bristol County | 20 | 1920 | High | Satisfactory |
| Bickford Pond Dike Worcester County | 17 | 1971 | High | Satisfactory |
| Bickford Pond Dam Worcester County | 51 | 1971 | High | Fair |
| Betty Pond Dam Worcester County | 9 | — | Low | Satisfactory |
| Bethune Pond Dam Essex County | 15 | — | Significant | Fair |
| Besse Bog Reservoir Dam Plymouth County | 17 | 1945 | Low | Not Rated |
| Berle Pond Dam Berkshire County | 12 | 1920 | Low | Not Rated |
| Berkshire Trout Pond Berkshire County | 9 | 1946 | Low | Fair |
| Bents Pond Dam Worcester County | 14 | 1900 | Significant | Poor |
| Ben Smith Dam Middlesex County | 9 | 1870 | Low | Satisfactory |
| Benedict Pond Dam Berkshire County | 13 | 1934 | Low | Satisfactory |
| Bemis Pond Dam Worcester County | 9 | — | Low | Satisfactory |
| Belmont Reservoir Dam Berkshire County | 29 | 1889 | High | Fair |
| Bel Air Dam Berkshire County | 27 | — | High | Unsatisfactory |
| Beaver Lake Dam Hampshire County | 14 | 1910 | Significant | Satisfactory |
| Beaver Dam Pond Dam Plymouth County | 13 | 1928 | Low | Not Rated |
| Beaver Brook Dam Middlesex County | 21 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.