Blackhawk Lake, located in Iowa, Wisconsin, is a picturesque water resource managed by the local government for recreational purposes. Built in 1969, this earth dam stands at a height of 50 feet, with a hydraulic height of 42 feet and a structural height of 50 feet. The reservoir has a storage capacity of 7,900 acre-feet, with a normal storage level of 3,810 acre-feet, covering a surface area of 220 acres.

Maintained by the Wisconsin Department of Natural Resources, Blackhawk Lake boasts controlled spillways and a low hazard potential, with a fair condition assessment as of May 2020. Despite its risk assessment being classified as very high, the dam has not undergone significant modifications over the years. The surrounding area is at a low risk of inundation, and the dam meets regulatory guidelines for inspection and enforcement.

With its serene surroundings and ample recreational opportunities, Blackhawk Lake is a beloved destination for water resource and climate enthusiasts to explore and appreciate the beauty of its Otter Creek and Cave Hollow Branch tributaries. Its rich history, steady water levels, and well-maintained infrastructure make it a valuable asset for the community and a must-visit spot for those interested in water conservation and outdoor activities in the heart of Wisconsin.