Dd No 108, also known as Wet Walnut Watershed Dam No 108, is a significant structure in Rush County, Kansas, designed by the USDA NRCS to primarily reduce flood risks in the area. Completed in 1976, this buttress dam stands at a height of 21.6 feet, with a hydraulic height of 20 feet and a structural height of 24 feet. It boasts a storage capacity of 605 acre-feet, with a normal storage of 32.7 acre-feet, covering a surface area of 10.8 acres and serving a drainage area of 1.43 square miles.

Managed by the local government, Dd No 108 is regulated by the Kansas Department of Agriculture, with state permitting, inspection, and enforcement procedures in place. Located in the city of Bison along Sand Creek, this dam plays a crucial role in safeguarding the surrounding community from potential flooding events. Despite its significant hazard potential, the condition assessment of Dd No 108 is currently not rated, indicating the need for further evaluation and risk management measures in the future.

As a key element in the flood risk reduction strategy for the area, Dd No 108 is a vital infrastructure asset that requires regular inspection and maintenance to ensure its effectiveness and safety. With its strategic location and impressive design specifications, this dam serves as a crucial component in the overall water resource management and climate resilience efforts in Rush County, Kansas.