You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place at N.W. side of the Rea Rd. bridge over the Au Sable River about 5 mi. N.W. of Oscoda. Oscoda Twp. Remove constraint Place: at N.W. side of the Rea Rd. bridge over the Au Sable River about 5 mi. N.W. of Oscoda. Oscoda Twp. Topic Poales Remove constraint Topic: Poales