May Pond Dam, also known as Butterfields Pond Dam, is a state-owned structure located in Washington, New Hampshire.
Wind
Humidity
Built in 1830, this earth dam stands at a height of 14 feet and stretches 215 feet in length, impounding the waters of the Ashuelot River for recreational purposes. The dam has a storage capacity of 950 acre-feet, with a normal storage level of 465 acre-feet across a surface area of 158 acres.
Managed by the NHDES Dam Bureau, May Pond Dam has a state-regulated status with inspection, permitting, and enforcement protocols in place. Despite being classified as having a significant hazard potential, the dam's condition has been assessed as fair as of October 2016. With a moderate risk assessment rating, the dam is equipped with a 63-foot uncontrolled spillway and has a maximum discharge capacity of 1071 cubic feet per second. This historical structure continues to play a vital role in water resource management and recreation within the region.
Year Completed |
1830 |
Dam Length |
215 |
Dam Height |
14 |
River Or Stream |
ASHUELOT RIVER |
Primary Dam Type |
Earth |
Surface Area |
158 |
Drainage Area |
6.84 |
Nid Storage |
950 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
14 |