Ballard Pond Mill Dam in Derry, New Hampshire, is a state-regulated earth dam that was completed in 1941 for recreational purposes.
Wind
Humidity
The dam stands at 21 feet high and stretches 300 feet in length, creating a surface area of 7.2 acres along Taylor Brook. With a storage capacity of 61 acre-feet and a normal storage of 39 acre-feet, the dam plays a significant role in managing water resources in the area.
Despite its age, Ballard Pond Mill Dam has been assessed as being in satisfactory condition, with a significant hazard potential due to its uncontrolled spillway. The dam is inspected regularly, with the last assessment conducted in September 2020. While the risk assessment categorizes it as moderate, appropriate risk management measures are in place to ensure the safety and integrity of the structure. For water resource and climate enthusiasts, Ballard Pond Mill Dam serves as a key point of interest in understanding the management of water infrastructure in the region and the importance of recreational dams in supporting local ecosystems.
Year Completed |
1941 |
Dam Length |
300 |
Dam Height |
21 |
River Or Stream |
TAYLOR BROOK |
Primary Dam Type |
Earth |
Surface Area |
7.2 |
Drainage Area |
4.37 |
Nid Storage |
61 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
21 |
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|
4cfs |
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|
10cfs |
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|
12cfs |
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|
1310cfs |
Exeter River At Haigh Road
|
15cfs |
Souhegan River At Merrimack
|
69cfs |