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 551–575 of 616
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Byron Weston Dam No. 1 Berkshire County | 28 | 1875 | Significant | Satisfactory |
| Buttonwood Park Pond Dam Bristol County | 8 | — | Significant | Poor |
| Button Shop Dam No. 2 Hampshire County | 24 | — | Significant | Poor |
| Button Shop Dam No. 1 Hampshire County | 20 | — | Significant | Poor |
| Butterfield Pond Dam Middlesex County | 22 | 1938 | Significant | Satisfactory |
| Buswell Pond Dam Essex County | 9 | 1923 | Significant | Fair |
| Burnshirt River Dam Worcester County | 8 | — | Significant | Fair |
| Burncoat Pond Dam Worcester County | 16 | — | Significant | Fair |
| Bulloughs Pond Dam Middlesex County | 15 | — | Significant | Poor |
| Buffumville Pond Dam Worcester County | 17 | — | Significant | Poor |
| Bucks Pond Dam Worcester County | 10 | — | Significant | Fair |
| Buck Hill Conservation Dam Worcester County | 15 | 1969 | Significant | Fair |
| Browning Pond Road Dam Worcester County | 7 | — | Significant | Satisfactory |
| Brookside Mill Dam Middlesex County | 16 | 1862 | Significant | Fair |
| Brockton Reservoir Dam Norfolk County | 17 | 1885 | Significant | Fair |
| Bristol Blake State Reservoir Dam Norfolk County | 15 | 1700 | Significant | Poor |
| Brigham Pond Dam Worcester County | 15 | 1872 | Significant | Unsatisfactory |
| Brierly Pond Main Dam Worcester County | 10 | — | Significant | Poor |
| Brewer Brook Dam Worcester County | 25 | 1964 | Significant | Satisfactory |
| Breckwood Pond Dam Hampden County | 20 | 1934 | Significant | Poor |
| Brackett Pond Dam No. 1 and No. 2 Essex County | 13 | 1930 | Significant | Poor |
| Boys & Girls Camp No. 3 Dam Plymouth County | 9 | — | Significant | Satisfactory |
| Boys & Girls Camp No. 1 Dam Plymouth County | 16 | — | Significant | Satisfactory |
| Bound Brook Dam Norfolk County | 11 | 1999 | Significant | Satisfactory |
| Boulder Hill Pond Dam Hampden County | 16 | — | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.