Dd No E-28 (Big-6) is a crucial water resource infrastructure located in Valley Falls, Kansas, designed by the USDA NRCS to serve the primary purpose of flood risk reduction. Completed in 1977, this earth dam stands at a height of 29 feet and has a storage capacity of 176.52 acre-feet, providing essential protection for the surrounding area against potential flooding events. With a low hazard potential and moderate risk assessment rating, this structure plays a key role in managing water flow and safeguarding the community against adverse impacts.

Situated on the Johannes Creek-TR river/stream, Dd No E-28 (Big-6) covers a drainage area of 0.64 square miles and offers a maximum discharge capacity of 801 cubic feet per second. Despite being uncontrolled, the spillway of this dam is designed to handle overflow efficiently, with a width of 100 feet. Although the condition assessment is currently listed as "Not Rated," the structure's risk management measures and emergency preparedness are essential components to ensure its continued functionality and safety. As a valuable asset in the local water resource management system, Dd No E-28 (Big-6) exemplifies the importance of proactive infrastructure investment in mitigating climate-related risks and protecting communities from potential water-related disasters.