Dd No E-4 is a local government-owned dam in Fort Scott, Kansas, designed by AG Engineering Assoc. It was completed in 1987 with the primary purpose of flood risk reduction along the Opossum Hollow River. The earth dam stands at 34 feet tall and stretches 800 feet in length, with a storage capacity of 463.5 acre-feet and a surface area of 7.4 acres.

Located in Bourbon County, Kansas, Dd No E-4 is regulated by the Kansas Department of Agriculture and meets state permitting, inspection, and enforcement requirements. The dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. While it has not been assigned a DSAC date, the risk assessment for Dd No E-4 is moderate (3), indicating the need for ongoing risk management measures to ensure its effectiveness in flood control.

Despite its low hazard potential, Dd No E-4 serves an important role in mitigating flood risks along the Opossum Hollow River. With its moderate risk assessment, continued monitoring and maintenance are essential to ensure the dam's ability to protect the surrounding area from potential flooding events.