Dams in Massachusetts
1,276
Total Dams
310
High Hazard
24.29%
% High Hazard
102.5 yrs
Average Age
Counties
| County | Dams | High Hazard | % High | Avg Age |
|---|---|---|---|---|
| Worcester | 393 | 93 | 23.66% | 103.7 yrs |
| Middlesex | 148 | 41 | 27.70% | 110.1 yrs |
| Berkshire | 111 | 41 | 36.94% | 84.5 yrs |
| Essex | 114 | 34 | 29.82% | 102.0 yrs |
| Bristol | 84 | 23 | 27.38% | 105.1 yrs |
| Hampden | 85 | 21 | 24.71% | 102.4 yrs |
| Hampshire | 70 | 18 | 25.71% | 97.9 yrs |
| Norfolk | 91 | 18 | 19.78% | 101.8 yrs |
| Franklin | 62 | 10 | 16.13% | 89.4 yrs |
| Plymouth | 96 | 10 | 10.42% | 121.4 yrs |
| Suffolk | 4 | 1 | 25.00% | 88.0 yrs |
| Barnstable | 17 | 0 | 0.00% | 127.0 yrs |
Purpose Breakdown
Tallest Dams in Massachusetts
| Dam Name | Height | County | Hazard |
|---|---|---|---|
| Cobble Mountain Reservoir Dam | 245 ft | Hampden | High Hazard |
| Quabbin Winsor Dam | 170 ft | Hampshire | High Hazard |
| Littleville Dam | 164 ft | Hampden | High Hazard |
| Bear Swamp - North Dike | 155 ft | Franklin | Low Hazard |
| Knightville Dam | 150 ft | Hampshire | High Hazard |
| Northfield Mt. - Main Dam | 145 ft | Franklin | High Hazard |
| Quabbin Goodnough Dike | 135 ft | Hampshire | High Hazard |
| Fife Brook | 130 ft | Franklin | High Hazard |
| Tighe Carmody Reservoir Dam | 130 ft | Hampshire | High Hazard |
| Wachusett Reservoir Dam | 114 ft | Worcester | High Hazard |