Udeys, located in Columbia, Wisconsin, is a gravity dam on the Crawfish River completed in 1917 primarily for recreation purposes. With a structural height of 14 feet and a hydraulic height of 10 feet, Udeys has a storage capacity of 185 acre-feet and a surface area of 26 acres. The dam's spillway type is controlled, with a maximum discharge capacity of 4,250 cubic feet per second.

Despite its satisfactory condition assessment, Udeys has a high hazard potential, prompting a biennial inspection frequency. The risk assessment for the dam is classified as very high, emphasizing the importance of proper risk management measures. The dam is regulated by the Wisconsin Department of Natural Resources (WIDNR) and has state jurisdiction, permitting, inspection, and enforcement in place.

Udeys serves as a key recreational spot in the area, attracting visitors to enjoy its scenic beauty and water-based activities. The dam's location in proximity to the city of Columbus makes it easily accessible for residents and visitors alike. With its historical significance and vital role in the local water resource management, Udeys stands as a testament to the importance of sustainable infrastructure development in mitigating climate-related risks.