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 376–400 of 616
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Kendall Mills Dam Norfolk County | 8 | — | Significant | Fair |
| Kendall Company No. 1 Dam Franklin County | 25 | 1831 | Significant | Satisfactory |
| Johnsons Pond Dam Essex County | 9 | 1930 | Significant | 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 |
| James Pond Dam Worcester County | 16 | 1851 | Significant | Satisfactory |
| Jacobs Pond Dam Plymouth County | 11 | 1730 | Significant | Fair |
| Island Grove Pond Dam Plymouth County | 12 | — | Significant | Fair |
| Ironstone Reservoir Dam Worcester County | 10 | 1928 | Significant | Poor |
| Irish Dam Worcester County | 13 | — | Significant | Fair |
| Industries Drive Dam Norfolk County | 18 | — | Significant | Poor |
| Indian Lake Dam Worcester County | 17 | 1920 | Significant | Fair |
| Hycrest Farm Pond Dam Worcester County | 11 | 1949 | Significant | Satisfactory |
| Hunts Pond Dam Plymouth County | 10 | 1920 | Significant | Unsatisfactory |
| Howe Reservoir Dam Worcester County | 11 | — | Significant | Fair |
| Howe Mill Pond Dam Worcester County | 13 | — | Significant | Fair |
| Horse Pond Dam Worcester County | 34 | — | Significant | Satisfactory |
| Horse Pond Dam Worcester County | 38 | 1964 | Significant | Satisfactory |
| Horn Pond Dam Middlesex County | 15 | 1989 | Significant | Fair |
| Hopedale Pond Dam Worcester County | 19 | — | Significant | Fair |
| Hollingsworth & Vose Dam Norfolk County | 12 | — | Significant | Fair |
| Holbrook Mill Pond Dam Worcester County | 16 | — | Significant | Poor |
| Hobbys Pond Dam Worcester County | 7 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.