This report summarizes the findings of a strategic dam modification study for the North Aurora Dam on the Fox River to investigate providing environmental benefits through river connectivity, enhancing the recreational use of navigable rivers and reducing the public safety hazards associated with the dam. This study was prepared under the authorization granted to the Illinois Department of Natural Resources (IDNR) under the 20 ILCS 805/805-100 Conservation of Fish and Game; and 20 ILCS 805/805-105 Conservation of Fauna and Flora.