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 176–200 of 319
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Shirley Dam Worcester County | 21 | 1852 | High | Satisfactory |
| Lake Samoset Dam Worcester County | 24 | — | High | Satisfactory |
| Lake Monomonac Dam Worcester County | 16 | — | High | Fair |
| Lake Maspenock Dam Worcester County | 18 | 1901 | High | Fair |
| Lake Garfield Dam Berkshire County | 20 | 1973 | High | Satisfactory |
| Lake Gardner Dam Essex County | 25 | 1872 | High | Satisfactory |
| Lake Cochituate Dam and Gate House Middlesex County | 14 | 1920 | High | Satisfactory |
| Lake Cochichewick Outlet Dam Essex County | 13 | 1865 | High | Fair |
| Knightville Dam Hampshire County | 150 | 1941 | High | Not Available |
| Kettle Brook Reservoir No. 4 Dam Worcester County | 36 | 1904 | High | Satisfactory |
| Kettle Brook Reservoir No. 3 Dam Worcester County | 38 | 1902 | High | Fair |
| Kettle Brook Reservoir No. 2 Dam Worcester County | 28 | 1903 | High | Satisfactory |
| Kettle Brook Reservoir No. 1 Dam Worcester County | 23 | 1896 | High | Satisfactory |
| Kendall Reservoir Dam Worcester County | 39 | 1911 | High | Fair |
| Iron Hill Dam Norfolk County | 26 | — | High | Satisfactory |
| Indian Orchard Hampden County | 30 | 1846 | High | Satisfactory |
| Indian Lake Dam Berkshire County | 15 | 1975 | High | Satisfactory |
| Indian Brook Dam Plymouth County | 13 | 1930 | High | Fair |
| Hovey Pond Dam Worcester County | 23 | 1870 | High | Satisfactory |
| Houghton Pond Dam Middlesex County | 10 | 1898 | High | Poor |
| Hoppin Hill Reservoir Dam Bristol County | 27 | 1910 | High | Satisfactory |
| Hopkinton State Park Swimming Pool Dam Middlesex County | 16 | 1967 | High | Satisfactory |
| Hopkinton Reservoir Dam Middlesex County | 58 | 1891 | High | Satisfactory |
| Hop Brook Dam Worcester County | 23 | 1962 | High | Satisfactory |
| Holyoke - Overflow No. 1 Hampden County | 30 | 1850 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.