Lower Mill Dam, located in Dowagiac, Michigan, is a historic structure completed in 1840 primarily used for recreation along the South Branch Dowagiac Creek. This earth dam stands at a height of 16.7 feet with a hydraulic height of 9.85 feet and a length of 320 feet, providing a storage capacity of 225 acre-feet. The dam's spillway type is uncontrolled with a width of 68 feet, allowing for a maximum discharge of 3800 cubic feet per second.
Despite its age, Lower Mill Dam is in satisfactory condition according to its last assessment in 2016, with a significant hazard potential but moderate risk level. The dam is inspected every 4 years, with state regulation and enforcement in place to ensure its safety and compliance. The surrounding area offers a surface area of 14 acres for recreational activities and a drainage area of 69.3 square miles, making it a popular destination for water resource and climate enthusiasts interested in exploring Michigan's water infrastructure and natural landscapes.