Wyocena, also known as Wyona Lake, is a gravity dam located in Columbia, Wisconsin, with a primary purpose of recreation. Completed in 1849, this dam stands at a height of 14 feet and has a hydraulic height of 8 feet. It has a maximum storage capacity of 500 acre-feet and a normal storage capacity of 309 acre-feet, with a surface area of 93 acres and a drainage area of 75 square miles. The dam has a controlled spillway type with a width of 75 feet, and a low hazard potential rating.

Managed by the local government, Wyocena is regulated by the Wisconsin Department of Natural Resources (WIDNR) and undergoes regular inspections to ensure its structural integrity. The dam has a satisfactory condition assessment as of March 2019, with a very high risk rating of 1. While the dam has not been modified significantly since 1993, it remains a popular recreational spot for water enthusiasts in the area. Overall, Wyocena serves as both a functional water resource and a scenic attraction in the region, offering a balance between recreation and environmental conservation.