Overview
Michael J. Kirwan Reservoir is a 2,650-acre project on the West Branch Mahoning River in Portage and Trumbull counties, completed about 1965–66. The U.S. Army Corps of Engineers Pittsburgh District operates it for flood risk management and recreation beside West Branch State Park. The reservoir is closely integrated with that large public recreation complex and forms part of northeast Ohio's Mahoning River Corps lake group.
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