Hopper Pond, also known as Hopper Brook, is a private hydroelectric dam located in Sandgate, Vermont. Built in 1920, this concrete dam stands at a height of 38 feet and has a storage capacity of 25 acre-feet. The primary purpose of the dam is for hydroelectric power generation, making it a key player in the local energy infrastructure.

Although not regulated by the state, Hopper Pond has a low hazard potential and has not been rated for its current condition. The dam, with a length of 157 feet and a hydraulic height of 38 feet, sits on a rock foundation and serves as a multi-arch structure. While it does not have a designated spillway, the dam's structural integrity and operational status have not been assessed since 1974.

For water resource and climate enthusiasts, Hopper Pond offers a fascinating glimpse into the history and engineering of hydroelectric infrastructure in Vermont. With its unique design and purpose, this dam serves as a reminder of the important role that water resources play in shaping our energy landscape.