Ghost Lake, located in Sawyer, Wisconsin, is a concrete dam structure built in 1924 with a primary purpose of recreation. The dam stands at 17 feet high with a hydraulic height of 14 feet and a length of 418 feet, creating a reservoir with a storage capacity of 2,300 acre-feet. The lake covers a surface area of 372 acres and has a drainage area of 22 square miles, with a maximum discharge of 550 cubic feet per second.

Managed by the Wisconsin Department of Natural Resources, Ghost Lake is regulated, inspected, and enforced by state authorities to ensure its safety and compliance with regulations. Despite being classified as having a low hazard potential, the dam's condition assessment in 2012 rated it as fair. With a very high risk rating, the lake is closely monitored and assessed for any potential risks or hazards, highlighting the importance of maintaining its infrastructure for both recreational use and environmental conservation. For water resource and climate enthusiasts, Ghost Lake offers a fascinating case study of dam management and the intersection of water conservation and recreational activities in a natural setting.