Mpd No 4, also known as Wakarusa Watershed Dam 4, is a flood risk reduction structure located in Shawnee, Kansas. Built in 1972 by the USDA NRCS, this dam stands at a height of 59 feet and has a hydraulic height of 46 feet. With a storage capacity of 760 acre-feet, it primarily serves to mitigate potential flooding in the area and is regulated by the Kansas Department of Agriculture.

Situated on Six Mile Creek-TR, Mpd No 4 is designed as a Buttress dam with a length of 1050 feet and a spillway width of 50 feet. Despite its low hazard potential, the dam's condition is currently not rated, and it has not undergone recent inspections or assessments. While it has not been modified since its completion, the dam's emergency action plan status, risk assessment, and management measures are currently unknown. As an essential structure for flood control in the region, Mpd No 4 plays a crucial role in safeguarding the surrounding communities from potential water-related disasters.

Water resource and climate enthusiasts will find Mpd No 4 to be a significant infrastructure project that highlights the importance of effective flood risk reduction strategies. With its strategic location in Shawnee, Kansas, this dam serves as a vital component of the local government's efforts to protect the area from potential flooding events. As the dam continues to play a crucial role in water management and disaster prevention, further assessments and inspections may be necessary to ensure its continued effectiveness in safeguarding the community and surrounding environment from water-related risks.