Wyandotte County Lake Dam, also known as Marshall Creek Dam, is a local government-owned structure located in Kansas City, Kansas. Completed in 1941 by the Corps of Engineers, this earth dam stands at a height of 97.5 feet with a hydraulic height of 118 feet and a structural height of 139 feet. It spans a length of 1790 feet and has a normal storage capacity of 10,000 acre-feet. Situated on the Missouri River, the dam serves primarily for recreational purposes, offering a surface area of 375 acres for outdoor activities.

Despite being regulated by the Kansas Department of Agriculture and subject to state inspection and enforcement, the dam is classified as having a significant hazard potential with a fair condition assessment. The last inspection was conducted in March 2016, with a frequency of every 5 years. While the dam lacks certain safety features such as spillways and outlet gates, it remains a popular destination for water resource and climate enthusiasts seeking recreational opportunities in the Wyandotte County area. As one of the key structures in the region, the dam plays a vital role in managing water resources and providing a scenic backdrop for outdoor recreation.

With its historical significance and impressive design by the Corps of Engineers, Wyandotte County Lake Dam stands as a prominent landmark in the Kansas City District. Boasting a storage capacity of 14,700 acre-feet and a maximum discharge of 11,000 cubic feet per second, the dam continues to attract visitors seeking a tranquil environment amidst the natural beauty of the Missouri River. As efforts are made to ensure the safety and maintenance of this iconic structure, it remains a symbol of the harmonious coexistence between human development and environmental preservation in the region.