Upper Dam, also known as Sedan City Dam, is a crucial water supply structure located in Sedan, Kansas on Deer Creek. Constructed in 1935 by BLACK & VEATCH, this buttress dam stands at a height of 35 feet and has a storage capacity of 1249.5 acre-feet. The dam spans 800 feet in length and covers a surface area of 57 acres, serving as a primary water source for the local community.

Managed by the Kansas Department of Agriculture, Upper Dam is regulated and inspected regularly to ensure its structural integrity and compliance with state guidelines. Despite its significant hazard potential and poor condition assessment, the dam continues to play a vital role in water resource management in Chautauqua County. With a history of modifications and a spillway width of 160 feet, Upper Dam remains a key feature in the region's water infrastructure.

While lacking in certain risk management measures and emergency preparedness protocols, Upper Dam remains a critical component of the local water supply system. As climate change impacts water resources, the importance of maintaining and upgrading infrastructure like Upper Dam becomes increasingly evident for ensuring water security and resilience in the face of changing environmental conditions.