Dd No. 143 is a local government-owned earth dam located in Cowley, Kansas, designed for flood risk reduction on the Walnut River. Completed in 1998, this structure stands at a height of 21 feet and spans 1000 feet in length, providing a storage capacity of 220.9 acre-feet. With a normal storage volume of 29.9 acre-feet and a surface area of 8.5 acres, Dd No. 143 plays a crucial role in managing floodwaters and protecting the surrounding area from potential inundation.

Managed by the Kansas Department of Agriculture, Dd No. 143 has a low hazard potential and a moderate risk assessment rating. Despite not being inspected recently or having a condition assessment, this dam is equipped with an uncontrolled spillway measuring 40 feet in width. While it does not have outlet gates, associated structures, or emergency action plans in place, the structure is deemed to meet regulatory guidelines for state jurisdiction, permitting, inspection, and enforcement. Overall, Dd No. 143 serves as a vital infrastructure for flood control and debris management in the region.

Located within the Kansas City District, this dam on the Walnut River is a key component in the region's water resource infrastructure. With its primary purpose being flood risk reduction, Dd No. 143 plays a critical role in protecting the local community from potential flooding events. As climate change continues to impact weather patterns, structures like Dd No. 143 become increasingly important in safeguarding communities and ecosystems against the threats of extreme weather and rising water levels.