Dd No C-118, also known as Delaware WS Joint District No 10 C118, is a flood risk reduction structure located in Larkinburg, Kansas. Built in 1978 by the USDA NRCS, this buttress dam stands at a height of 35 feet with a hydraulic height of 30 feet. With a capacity to store 110 acre-feet of water, it serves the primary purpose of mitigating flood risks along Elk Creek-TR.

Managed by the Kansas Department of Agriculture, Dd No C-118 is regulated and inspected regularly to ensure its functionality and safety. Despite being classified as having low hazard potential, the dam's condition is currently not rated. With a spillway width of 109 feet and a maximum discharge capacity of 540 cubic feet per second, this structure plays a crucial role in managing water flow in the area. Although it has not undergone any modifications since its completion, it continues to serve its purpose effectively.

Though not considered a high-risk structure, Dd No C-118 is an essential part of the water management infrastructure in Jackson County, Kansas. With its strategic location and design, it contributes to the overall flood risk reduction efforts in the region. As climate change continues to impact water resources, structures like Dd No C-118 play a crucial role in safeguarding communities and ecosystems from the potential threats of extreme weather events.