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 1126–1150 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Turners Falls Dike Franklin County | 10 | 1905 | Low | Satisfactory |
| Turnpike Lake North Dam Norfolk County | 9 | — | Significant | Poor |
| Tuxbury Pond Dam Essex County | 10 | 1929 | Significant | Satisfactory |
| Tyler Dam Middlesex County | 34 | 1965 | High | Satisfactory |
| Unionville Pond Dam Worcester County | 21 | 1909 | Significant | Fair |
| Unquomonk Upper Reservoir Dam Hampshire County | 27 | 1903 | Low | Satisfactory |
| Upper Artichoke Reservoir Dam Essex County | 15 | 1920 | Low | Satisfactory |
| Upper Banjo Pond Dam Essex County | 17 | 1908 | High | Poor |
| Upper Bemis Pond Dam Hampden County | 17 | 1954 | Low | Poor |
| Upper Crow Hills Pond Dam Worcester County | 11 | 1956 | Significant | Fair |
| Upper Flannagan Pond Dam Middlesex County | 9 | 1955 | Significant | Poor |
| Upper Flint Pond Dam Middlesex County | 9 | — | Significant | Poor |
| Upper Glen Reservoir Dam Franklin County | 59 | 1904 | Significant | Satisfactory |
| Upper Highland Lake Dam Hampshire County | 27 | 1872 | High | Satisfactory |
| Upper Highland Lake Dike Hampshire County | 15 | 1872 | Significant | Satisfactory |
| Upper Leach Pond Dike No. 1 Norfolk County | 7 | 1930 | Low | Poor |
| Upper Leach Pond Dike No. 2 Norfolk County | 8 | 1930 | Low | Poor |
| Upper Lynde Basin Dam Worcester County | 15 | 1924 | Significant | Poor |
| Upper Meadow Pond Dam and Dike Worcester County | 14 | 1961 | Low | Fair |
| Upper Merino Pond Dam Worcester County | 20 | — | High | Fair |
| Upper Millpond Dam Essex County | 9 | 1920 | Low | Fair |
| Upper Mystic Lake Dam Middlesex County | 16 | 1860 | Significant | Satisfactory |
| Upper Naukeag Lake Dam Worcester County | 8 | 1875 | Significant | Satisfactory |
| Upper Porter Pond Dam Plymouth County | 12 | 1940 | Significant | Fair |
| Upper Reservoir Dam Worcester County | 12 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.