Park Mill, located on the Menominee River at the border of Menominee, Michigan, and Marinette, Wisconsin, is a concrete gravity dam completed in 1920 primarily for hydroelectric purposes. With a height of 24 feet and a length of 538 feet, this dam has a storage capacity of 3,788 acre-feet and serves a drainage area of 4,060 square miles. The dam features a Tainter spillway with a width of 303 feet and is equipped with 12 radial outlet gates.

Managed by the Federal Energy Regulatory Commission, Park Mill has a low hazard potential and a moderate risk assessment rating. While the condition assessment is listed as "Not Available," the dam undergoes inspections every 3 years to ensure its structural integrity and operational efficiency. Emergency action plans have been prepared and updated periodically, demonstrating a commitment to the safety and proper management of this essential water resource infrastructure in the region.