Lake Aaron, located in Douglas County, Minnesota, is a state-regulated reservoir with a primary purpose classified as "Other." The dam, completed in 1964, is a gravity type structure with a height of 8 feet and a length of 10 feet. The reservoir has a normal storage capacity of 178,500 acre-feet and a maximum storage of 190,000 acre-feet, covering a surface area of 611 acres. The drainage area for Lake Aaron is 6.5 square miles, with a maximum discharge capacity of 95 cubic feet per second.

Managed by the Minnesota Department of Natural Resources, Lake Aaron poses a low hazard potential and has been assessed as satisfactory in condition. The last inspection conducted in June 2016 deemed the dam structurally sound. The reservoir serves as an important water resource for the surrounding area, with state-regulated permitting, inspection, and enforcement in place to ensure its safety and longevity. Enthusiasts of water resources and climate will be intrigued by the unique design and purpose of Lake Aaron, as well as its role in managing water flow on the Chippewa River.

With its picturesque location in Millerville, Minnesota, Lake Aaron offers a serene setting for outdoor enthusiasts to enjoy activities such as fishing, boating, and wildlife observation. The reservoir's association with the Chippewa River adds to its ecological significance, providing a habitat for diverse flora and fauna. As climate change continues to impact water resources, understanding and monitoring the management of reservoirs like Lake Aaron becomes increasingly important for conservation efforts and sustainable water management practices in the region.