Black Reservoir Dam, located in Jaffrey, New Hampshire, is a state-regulated earth dam with a primary purpose of recreation.
Wind
Humidity
Completed in 1850, the dam stands at a height of 10 feet and has a length of 180 feet, providing a storage capacity of 253 acre-feet. The dam, situated on Willow Brook, covers a surface area of 48 acres and has a drainage area of 5.6 square miles.
The dam's spillway, with a width of 25 feet, is uncontrolled, and the hazard potential of the dam is considered significant with a poor condition assessment as of May 2016. Despite its condition, the risk assessment for Black Reservoir Dam is moderate. The dam is inspected regularly, with the last inspection conducted in April 2019. The surrounding area offers opportunities for recreational activities, making it a popular destination for water resource and climate enthusiasts to explore and appreciate the intersection of nature and infrastructure.
Year Completed |
1850 |
Dam Length |
180 |
Dam Height |
10 |
River Or Stream |
WILLOW BROOK |
Primary Dam Type |
Earth |
Surface Area |
48 |
Drainage Area |
5.6 |
Nid Storage |
253 |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
10 |