Located in the Fall River Watershed in Kansas, Frd No S-1, also known as Fall River Watershed Dam S-1, is a critical structure designed by USDA NRCS to mitigate flood risks. This earth dam, standing at a height of 61 feet with a hydraulic height of 58 feet, was completed in 1965 and serves the primary purpose of flood risk reduction. With a storage capacity of 6830 acre-feet and a surface area of 64.29 acres, Frd No S-1 plays a crucial role in managing the flow of Spring Creek and protecting the surrounding area from potential inundation.

Owned and regulated by the local government in Greenwood, Kansas, Frd No S-1 is subject to inspections, permitting, and enforcement by the Kansas Dept. of Agriculture. The dam has a low hazard potential and its condition is currently not rated. Despite its moderate risk assessment, the structure has not been modified in recent years and does not have an emergency action plan in place. With a controlled spillway width of 80 feet and no outlet gates, Frd No S-1 continues to provide essential flood protection for the community while maintaining a moderate risk level that warrants ongoing monitoring and management to ensure its continued effectiveness.