The Great Falls-Dearborn Main and Headworks Spillways, also known as the Canal Headworks, are essential structures located in Great Falls, South Carolina along the Catawba River. Built in 1907 by the Southern Power Company, these spillways serve a primary purpose for hydroelectric power generation. The gravity dam stands at a height of 37 feet with a hydraulic height of 107 feet, providing a storage capacity of 2043 acre-feet.

With a low hazard potential and moderate risk assessment, the Great Falls-Dearborn Main and Headworks Spillways have a controlled spillway type with a width of 919 feet. The associated structures include SC00140S002 and SC00140S003, contributing to the overall efficiency of the hydroelectric system. Managed by the Federal Energy Regulatory Commission, these spillways play a crucial role in water resource management and climate resilience efforts in the region.