Gage - South Dam, located in Passumpsic, Vermont, is a concrete gravity dam built in 1921 for hydroelectric purposes on the Passumpsic River. Standing at 18 feet high and 69 feet long, this dam has a storage capacity of 69 acre-feet and serves a drainage area of 413 square miles. With a maximum discharge capacity of 5440 cubic feet per second and an uncontrolled spillway width of 43 feet, the dam poses a low hazard potential and has a moderate risk assessment rating.

Owned by a public utility, Gage - South Dam falls under the jurisdiction of the Vermont Public Service Board and is regulated by the Federal Energy Regulatory Commission. The dam has one associated structure and is inspected every three years, with its last inspection conducted in June 2017. While the condition assessment is not available, the dam's emergency action plan was last revised in February 2014, showcasing a commitment to safety and risk management measures.

Overall, Gage - South Dam is a vital infrastructure supporting the region's energy needs while maintaining a balance between water resource management and environmental protection. With its historical significance and engineering design, this dam serves as a crucial asset in harnessing hydropower potential in Vermont's Caledonia County, contributing to sustainable development and climate resilience efforts in the area.