Glen Road, also known as Mascoma Dam No.3, is a private hydroelectric structure located in Lebanon, New Hampshire. Completed in 1988, this concrete gravity dam stands at a height of 16 feet and has a length of 175 feet, with a storage capacity of 10.2 acre-feet. The dam, situated on the Mascoma River, is regulated by the New Hampshire Department of Environmental Services Dam Bureau and inspected by the Federal Energy Regulatory Commission.

With a spillway width of 123 feet and a maximum discharge of 8970 cubic feet per second, Glen Road poses a significant hazard potential. Despite its moderate risk assessment rating, the condition assessment of the dam is currently listed as "Not Available." Emergency action plans have been prepared, but their adherence to guidelines and effectiveness in risk management remain undisclosed. The structure's location within a high-risk area underscores the importance of ongoing monitoring and maintenance to ensure its safety and resilience in the face of climate change impacts on water resources.