Located in Chippewa, Wisconsin, Willow Creek Flowage No 1 is a state-regulated earth dam completed in 1966 for the primary purpose of serving as a fish and wildlife pond. With a structural height of 8.8 feet and a length of 200 feet, the dam has a maximum storage capacity of 67 acre-feet and covers a surface area of 28 acres. The dam is equipped with a controlled spillway measuring 37 feet wide to manage a maximum discharge of 145 cubic feet per second.

Despite being classified as having a low hazard potential and fair condition assessment, the dam is situated in an area with a very high risk assessment ranking. The emergency action plan for Willow Creek Flowage No 1 was last revised in 2014, with inspections occurring every 10 years. The regulatory oversight for the dam falls under the Wisconsin Department of Natural Resources, ensuring that the structure is regularly inspected, permitted, and enforced to meet state standards.

Willow Creek Flowage No 1 serves as a vital habitat for local fish and wildlife, while also providing recreational opportunities for outdoor enthusiasts. With its strategic location and purposeful design, this earth dam showcases the intersection of water resource management and climate adaptation efforts in Wisconsin's diverse ecosystem.