Olpe City Lake, also known as Olpe City Dam, is a picturesque water resource located in Lyon County, Kansas. The dam was completed in 1965 and serves as a vital water supply for the local community. With a normal storage capacity of 475 acre-feet and a maximum storage of 879 acre-feet, the lake covers a surface area of 75 acres and has a drainage area of 1.52 square miles.

Managed by the local government and regulated by the Kansas Department of Agriculture, Olpe City Lake is primarily used for water supply but also offers recreational opportunities. The dam is classified as an Earth dam with a structural height of 43 feet and a hydraulic height of 25 feet. The spillway, with a width of 100 feet, is uncontrolled, and the hazard potential of the dam is rated as low.

Although the condition assessment of the dam is fair, with moderate risk management measures in place, the overall risk assessment is deemed moderate. The last inspection of the dam was conducted in 2013, and the emergency action plan (EAP) status is currently unknown. Olpe City Lake provides a serene and functional water resource for the community while also offering a peaceful setting for recreational activities.