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 751–775 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Kendall Reservoir Dam Worcester County | 39 | 1911 | High | Fair |
| Kendall Mills Dam Norfolk County | 8 | — | Significant | Fair |
| Kendall Company No. 1 Dam Franklin County | 25 | 1831 | Significant | Satisfactory |
| Kelleher Dam Plymouth County | 15 | 1945 | Low | Poor |
| Juda Dam Hampshire County | 16 | 1962 | Low | Fair |
| Jones Pond Dam Worcester County | 11 | 1930 | Low | Poor |
| Johns Pond Dam Barnstable County | 8 | 2003 | Low | Fair |
| Johnsons Pond Dam Essex County | 9 | 1930 | Significant | Fair |
| Johnson Pond Dam Bristol County | 10 | 1950 | Low | Fair |
| Johnson Creek Dam Essex County | 16 | 1913 | Significant | Poor |
| John Leo Silver Lake Dam Essex County | 13 | — | Significant | Poor |
| John A.W. Pearce Lake Dam Essex County | 11 | — | Significant | Poor |
| Jenney (Arms House) Pond Dam Plymouth County | 13 | — | Significant | Fair |
| Jenks Pond Dam Norfolk County | 7 | 1900 | Low | Poor |
| James Pond Dam Worcester County | 16 | 1851 | Significant | Satisfactory |
| Jacobs Pond Dam Plymouth County | 11 | 1730 | Significant | Fair |
| Island Pond Dam Plymouth County | 10 | — | Low | Poor |
| Island Grove Pond Dam Plymouth County | 12 | — | Significant | Fair |
| Ironstone Reservoir Dam Worcester County | 10 | 1928 | Significant | Poor |
| Iron Hill Dam Norfolk County | 26 | — | High | Satisfactory |
| Irish Dam Worcester County | 13 | — | Significant | Fair |
| Ipswich Mills Dam Essex County | 11 | 1637 | Low | Fair |
| Intake Dam Hampden County | 59 | 1909 | Low | Fair |
| Industries Drive Dam Norfolk County | 18 | — | Significant | Poor |
| Indian Trail Reservoir No. 3 Dam Plymouth County | 7 | 1900 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.