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 251–275 of 616
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Boon Dam Middlesex County | 10 | 1847 | Significant | Poor |
| Lake Bray Dam Hampden County | 13 | — | Significant | Fair |
| Lake Como Dam Bristol County | 13 | — | Significant | Fair |
| Lake Ellis Dam Worcester County | 13 | 1852 | Significant | Fair |
| Lake George Dam Hampden County | 11 | — | Significant | Fair |
| Lake Hiawatha Dam Worcester County | 10 | 2007 | Significant | Satisfactory |
| Lake Holbrook Dam Norfolk County | 10 | 1920 | Significant | Poor |
| Lake Lashaway Dam Worcester County | 23 | 1926 | Significant | Fair |
| Lake Mattawa North Dam Franklin County | 15 | 1893 | Significant | Poor |
| Lake Mattawa South Dam Franklin County | 10 | 1893 | Significant | Poor |
| Lake Mirimichi Dam Norfolk County | 11 | 1925 | Significant | Fair |
| Lake Pentucket Dam East Essex County | 8 | 1808 | Significant | Fair |
| Lake Rico Dam Bristol County | 27 | 1972 | Significant | Fair |
| Lake Ripple Dam Worcester County | 15 | 1982 | Significant | Satisfactory |
| Lamberton Brook Dam Worcester County | 26 | 1965 | Significant | Satisfactory |
| Lambs Pond Dam Worcester County | 6 | — | Significant | Satisfactory |
| Lancaster Mill Pond Dam Worcester County | 26 | — | Significant | Fair |
| Langwater Pond Dam Bristol County | 11 | — | Significant | Fair |
| Larner Pond Dam Worcester County | 20 | 1830 | Significant | Fair |
| Lee Pond Dam Worcester County | 26 | 1880 | Significant | Fair |
| Leesville Pond Dam Worcester County | 15 | 1830 | Significant | Fair |
| Lensdale Pond Dam Worcester County | 21 | — | Significant | Fair |
| Lexington Reservoir Dam Middlesex County | 10 | — | Significant | Satisfactory |
| Liberty Street Dam Plymouth County | 11 | 1695 | Significant | Fair |
| Lily Pond Outlet Dam Essex County | 9 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.