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 676–700 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Little Robin Hood Lake Dam Berkshire County | 17 | 1960 | Significant | Satisfactory |
| Little River Dam Essex County | 12 | — | Significant | Fair |
| Little Nugget Lake Dam Worcester County | 11 | — | Significant | Satisfactory |
| Little Galilee Pond Dam Hampshire County | 15 | — | Low | Poor |
| Lithia Springs Reservoir Dam Hampshire County | 26 | 1948 | Low | Fair |
| Linwood Pond Dam Worcester County | 18 | 1865 | High | Satisfactory |
| Lily Pond Outlet Dam Essex County | 9 | — | Significant | Fair |
| Liberty Street Dam Plymouth County | 11 | 1695 | Significant | Fair |
| Liberman'S Pond Dam Berkshire County | 12 | 1985 | Low | Satisfactory |
| Lexington Reservoir Dam Middlesex County | 10 | — | Significant | Satisfactory |
| Lester G. Ross Dam Worcester County | 46 | 1974 | High | Satisfactory |
| Leonards Pond Dam Plymouth County | 15 | — | Low | Fair |
| Lensdale Pond Dam Worcester County | 21 | — | Significant | Fair |
| Leesville Pond Dam Worcester County | 15 | 1830 | Significant | Fair |
| Lee Reservoir Dam Worcester County | 12 | — | Low | Satisfactory |
| Lee Pond Dam Worcester County | 26 | 1880 | Significant | Fair |
| Leaping Well Reservoir Dam Hampshire County | 29 | 1890 | High | Satisfactory |
| Leahey (Upper) Reservoir Dam and Dike Berkshire County | 57 | 1965 | High | Satisfactory |
| Leach Pond Dam Bristol County | 7 | — | Low | Unsatisfactory |
| Lawrence Reservoir Dam Essex County | 28 | 1875 | Low | Satisfactory |
| Laurel Lake Dam Franklin County | 9 | — | Low | Fair |
| Laurel Lake Dam Berkshire County | 12 | — | High | Satisfactory |
| Larner Pond Dam Worcester County | 20 | 1830 | Significant | Fair |
| Langwater Pond Dam Bristol County | 11 | — | Significant | Fair |
| Lancelot Lake Dam Berkshire County | 16 | 1967 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.