Lower Mountain Lake Dam, located in Haverhill, New Hampshire, is a significant structure regulated by the NHDES Dam Bureau. Completed in 1967, the primary purpose of this earth dam is for recreation, with a storage capacity of 376 acre-feet and a surface area of 41 acres. The dam stands at a height of 33 feet and has a spillway width of 8 feet, capable of handling a maximum discharge of 1650 cubic feet per second.
Despite being classified as having a significant hazard potential, the dam is in fair condition as of the last assessment in October 2017. The inspection frequency is every 4 years, with the last inspection conducted on October 5, 2017. The risk assessment for the dam is moderate, with no specific risk management measures mentioned in the data. Overall, Lower Mountain Lake Dam serves as an important recreational resource in Grafton County and is a key structure for water management in the region.
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