Lexington Lake Park (Rieke Lake Dam) in De Soto, Kansas, is a private earth dam managed by the USDA NRCS with a primary purpose of recreation. Located along the Kansas River, the dam stands at a height of 53 feet, with a hydraulic height of 51 feet and a length of 850 feet. The reservoir behind the dam has a normal storage capacity of 364.5 acre-feet and a maximum storage capacity of 504.6 acre-feet, covering a surface area of 26.7 acres.

The dam is state-regulated by the Kansas Department of Agriculture, with regular inspections conducted to ensure its safety and integrity. With a hazard potential rated as high but a moderate risk assessment, the dam provides both recreational opportunities and essential water resource management for the area. Although the dam is not under the jurisdiction of the USACE, its design and construction by the NRCS reflect a commitment to sustainable water resource management and climate resilience in the region.

Visitors to Lexington Lake Park can enjoy fishing, boating, and other recreational activities while appreciating the role of the dam in providing water storage and flood control along the Kansas River. The dam's uncontrolled spillway and lack of outlet gates indicate a design focused on natural flow management, enhancing the ecological value of the reservoir and surrounding wildlife habitat. With its picturesque setting and important water resource functions, Lexington Lake Park is a must-visit destination for water resource and climate enthusiasts seeking to explore the intersection of nature and infrastructure in Johnson County, Kansas.