Blue Hills, also known as Hill Trail Flowage, is a locally owned dam located in Rusk, Wisconsin. Completed in 1973, this earth dam stands at a height of 13 feet and has a hydraulic height of 8.6 feet. With a storage capacity of 250 acre-feet and a surface area of 42 acres, Blue Hills serves a primary purpose of 'Other' and is regulated by the Wisconsin Department of Natural Resources.

Despite its low hazard potential, Blue Hills is considered to have a very high risk due to its location on the TR BIG WEIRGOR river. The dam has a controlled spillway with a width of 26 feet and a maximum discharge capacity of 50 cubic feet per second. While the dam's condition assessment is currently 'Not Rated', it undergoes inspections every 10 years, with the last inspection conducted in June 2003.

Water resource and climate enthusiasts will appreciate the unique characteristics of Blue Hills, from its modest height of 13 feet to the picturesque surroundings of Rusk County, Wisconsin. As a locally owned structure with a relatively low hazard potential, the dam provides important flood control and water storage benefits while being closely monitored and regulated by the state. Despite its risk assessment indicating a very high level of risk, ongoing inspections and management measures ensure the safety and integrity of Blue Hills for the surrounding community and ecosystem.