Hemlock is a local government-owned earth dam located in Sauk, Wisconsin, specifically in the city of La Valle. Built in 1964, this structure serves primarily for recreation purposes, offering visitors a serene environment to enjoy outdoor activities. Situated on the Hemlock Slough of Baraboo River, the dam has a height of 11 feet and a length of 1800 feet, with a maximum storage capacity of 85 acre-feet and a normal storage of 50 acre-feet.

Despite its low hazard potential and fair condition assessment, Hemlock poses a very high risk due to its location and potential impact on the surrounding area. The dam has a controlled spillway type and a hydraulic height of 6 feet, with a maximum discharge capacity of 45 cubic feet per second. Regular inspections are conducted to ensure its safety, with the last assessment completed in June 2016. With its beautiful surroundings and recreational opportunities, Hemlock is a valuable water resource in the region, contributing to the overall enjoyment and conservation of water in Wisconsin.

As climate change continues to impact water resources and infrastructure, the management and maintenance of dams like Hemlock become increasingly vital. With the state regulatory agency WIDNR overseeing its permitting, inspection, and enforcement processes, Hemlock is part of a comprehensive system designed to protect both the dam structure and the environment it serves. As enthusiasts of water resources and climate resilience, understanding the importance of structures like Hemlock is essential in safeguarding our natural resources for future generations.