Osawatomie Lake Dam, also known as Osawatomie City Dam, is a local government-owned structure located in Miami County, Kansas. Completed in 1938, this earth dam serves multiple purposes including recreation and irrigation. With a height of 33 feet and a hydraulic height of 30 feet, the dam has a storage capacity of 340 acre-feet and a drainage area of 0.94 square miles.

Situated on the Marais des Cygnes River, Osawatomie Lake Dam has a low hazard potential and is not currently rated for its condition. The dam is regulated by the Kansas Department of Agriculture, which oversees its permitting, inspection, and enforcement processes. Despite being a local government-owned structure, there is no federal involvement in the funding, design, construction, or operation of the dam.

Osawatomie Lake Dam provides a serene recreational space for water resource and climate enthusiasts in the Osawatomie area. With its picturesque surroundings and historical significance, the dam offers a peaceful escape for visitors looking to enjoy the beauty of nature and engage in outdoor activities. While the dam's risk assessment and emergency preparedness measures are not fully detailed, its importance in the local community is evident through its role in providing water resources for both recreation and irrigation purposes.