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 701–725 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lancaster Mill Pond Dam Worcester County | 26 | — | Significant | Fair |
| Lambs Pond Dam Worcester County | 6 | — | Significant | Satisfactory |
| Lamberton Brook Dam Worcester County | 26 | 1965 | Significant | Satisfactory |
| Lake Wyola Dam Franklin County | 12 | — | High | Fair |
| Lake Williams Dam Middlesex County | 11 | 1882 | High | Fair |
| Lake Wickaboag Dam Worcester County | 7 | 2000 | Low | Satisfactory |
| Lake Whittemore Dam Worcester County | 18 | — | High | Satisfactory |
| Lake Watatic Dam Worcester County | 20 | 1955 | High | Fair |
| Lake Warner Dam Hampshire County | 17 | 1918 | Low | Satisfactory |
| Lake Wampanoag Dam Worcester County | 22 | — | High | Fair |
| Lake Shirley Dam Worcester County | 21 | 1852 | High | Satisfactory |
| Lake Samoset Dam Worcester County | 24 | — | High | Satisfactory |
| Lake Rohunta Dam Worcester County | 24 | 1943 | Low | Satisfactory |
| Lake Ripple Dam Worcester County | 15 | 1982 | Significant | Satisfactory |
| Lake Rico Dam Bristol County | 27 | 1972 | Significant | Fair |
| Lake Pentucket Dam East Essex County | 8 | 1808 | Significant | Fair |
| Lake Noquochoke Upper Dike Bristol County | 8 | — | Low | Poor |
| Lake Noquochoke Upper Dam Bristol County | 11 | — | Low | Poor |
| Lake Monomonac Dam Worcester County | 16 | — | High | Fair |
| Lake Mirimichi Dam Norfolk County | 11 | 1925 | Significant | Fair |
| Lake Mattawa South Dam Franklin County | 10 | 1893 | Significant | Poor |
| Lake Mattawa North Dam Franklin County | 15 | 1893 | Significant | Poor |
| Lake Maspenock Dam Worcester County | 18 | 1901 | High | Fair |
| Lake Lashaway Dam Worcester County | 23 | 1926 | Significant | Fair |
| Lake Holbrook Dam Norfolk County | 10 | 1920 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.