Dd No 8-5, located in Ottawa, Kansas, is a local government-owned dam constructed in 1995 for flood risk reduction along the Tauy Creek-TR river/stream. Designed by J. Dale Steward, P.E., the dam stands at 22 feet tall and spans 880 feet in length, with a storage capacity of 240.89 acre-feet. The dam's primary purpose is flood risk reduction, with additional functions including debris control.

This earth dam, with a buttress core type, is regulated by the Kansas Department of Agriculture and undergoes regular inspections to ensure its fair condition and high hazard potential are managed effectively. The dam's spillway type is uncontrolled, with a width of 100 feet, and it has no outlet gates. The surrounding area has a drainage area of 0.7 square miles, with a maximum discharge capacity of 1290 cubic feet per second.

Despite its moderate risk assessment level, Dd No 8-5 serves as a crucial infrastructure for managing flood risks in the region. With its strategic location and design, the dam plays a vital role in protecting the local community from potential inundation events and highlights the importance of water resource management and climate resilience efforts in safeguarding vulnerable areas against natural disasters.