Dd No C-56 (King), also known as Delaware WS Joint District No 10 C56, is a local government-owned dam located in Holton, Kansas. Constructed in 1978 by the USDA NRCS, this earth dam stands at a height of 38 feet and serves the primary purpose of flood risk reduction along the Elk Creek-TR river or stream. With a storage capacity of 123.79 acre-feet and a moderate hazard potential rating, this structure plays a crucial role in mitigating flood risks in the area.

Managed by the Kansas Department of Agriculture, Dd No C-56 is regulated, permitted, inspected, and enforced by state agencies to ensure its safety and functionality. With a spillway width of 94 feet and a maximum discharge capacity of 423 cubic feet per second, this dam is designed to handle excess water during heavy rainfall events. Despite its low hazard potential, the dam's condition assessment is currently listed as "Not Rated," indicating a need for further evaluation and maintenance to uphold its effectiveness in flood risk reduction.

As a key element in the flood control infrastructure of Jackson County, Kansas, Dd No C-56 (King) serves as a vital component in protecting the surrounding communities from potential inundation. With its strategic location, design features, and state oversight, this dam contributes to the overall resilience of the region against the impacts of extreme weather events and climate variability. For water resource and climate enthusiasts, understanding the significance of this structure sheds light on the intersection of infrastructure, environmental protection, and community safety in the face of changing climate conditions.