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 501–525 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Horse Pond Dam Worcester County | 34 | — | Significant | Satisfactory |
| Horse Pond Dam Worcester County | 38 | 1964 | Significant | Satisfactory |
| Horse Shoe Regulating Dam Franklin County | 32 | 1938 | Low | Not Rated |
| Houghton Pond Dam Middlesex County | 10 | 1898 | High | Poor |
| Hovey Pond Dam Worcester County | 23 | 1870 | High | Satisfactory |
| Howe Mill Pond Dam Worcester County | 13 | — | Significant | Fair |
| Howe Reservoir Dam Worcester County | 11 | — | Significant | Fair |
| Hunts Pond Worcester County | 15 | 1936 | Low | Satisfactory |
| Hunts Pond Dam Plymouth County | 10 | 1920 | Significant | Unsatisfactory |
| Hycrest Farm Pond Dam Worcester County | 11 | 1949 | Significant | Satisfactory |
| Ice House Middlesex County | 15 | 1906 | Low | Satisfactory |
| Indian Brook Dam Plymouth County | 13 | 1930 | High | Fair |
| Indian Hill Reservoir Dam and Dikes Essex County | 30 | 1981 | Low | Fair |
| Indian Lake Dam Worcester County | 17 | 1920 | Significant | Fair |
| Indian Lake Dam Berkshire County | 15 | 1975 | High | Satisfactory |
| Indian Orchard Hampden County | 30 | 1846 | High | Satisfactory |
| Indian Trail Reservoir No. 3 Dam Plymouth County | 7 | 1900 | Low | Not Rated |
| Industries Drive Dam Norfolk County | 18 | — | Significant | Poor |
| Intake Dam Hampden County | 59 | 1909 | Low | Fair |
| Ipswich Mills Dam Essex County | 11 | 1637 | Low | Fair |
| Irish Dam Worcester County | 13 | — | Significant | Fair |
| Iron Hill Dam Norfolk County | 26 | — | High | Satisfactory |
| Ironstone Reservoir Dam Worcester County | 10 | 1928 | Significant | Poor |
| Island Grove Pond Dam Plymouth County | 12 | — | Significant | Fair |
| Island Pond Dam Plymouth County | 10 | — | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.