Gant Creek Watershed Site C-3, located in Sioux City, Iowa, is a critical water resource managed by the local government with regulatory oversight from the Iowa Department of Natural Resources. This earth dam, completed in 1974 by the USDA NRCS, serves multiple purposes including fire protection, stock watering, small fish pond management, and flood risk reduction. With a height of 40 feet and a length of 680 feet, the dam has a storage capacity of 98 acre-feet and covers a surface area of 6 acres within a drainage area of 1.17 square miles.

Although the hazard potential of the dam is rated as low and its condition is currently not assessed, a moderate risk level is identified due to unspecified factors. The dam is equipped with an uncontrolled spillway and does not have outlet gates or associated structures. While the emergency action plan status and risk management measures are not specified, the dam is subject to state inspection, permitting, and enforcement requirements. Overall, Gant Creek Watershed Site C-3 serves as a vital infrastructure for water management and protection in the region, contributing to the resilience of the local ecosystem and community in the face of climate variability and water resource challenges.