Dd No H-20, also known as Upper Pottawatomie Creek, is a flood risk reduction structure located in Anderson County, Kansas. Owned by the local government and regulated by the Kansas Department of Agriculture, this dam was designed by the USDA NRCS and serves the primary purpose of reducing flood risks along the Dry Branch river or stream. With a height of 45 feet and a hydraulic height of 41 feet, this buttress-type dam spans 1715 feet and has a storage capacity of 2109 acre-feet.

Situated in Lane, Kansas, Dd No H-20 has a low hazard potential and is currently not rated for condition assessment. The dam does not have any associated structures and has not undergone recent inspections or maintenance. Despite its status, it plays a crucial role in mitigating flood risks in the area, with a maximum discharge capacity of 1760 cubic feet per second and a spillway width of 250 feet. As a key piece of infrastructure in the region, it is important to monitor and maintain Dd No H-20 to ensure its effectiveness in protecting the surrounding community from potential flooding events.