You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Within boundary of Sielbeck Woods State Natural Area, remnant of the Big Black Slough, Ohio River Floodplain, vicinity of Upper Salem Road, about 2 miles northwest of Metropolis & 8 miles northeast of Joppa. Joppa 7.5' topo quadrangle. Remove constraint Place: Within boundary of Sielbeck Woods State Natural Area, remnant of the Big Black Slough, Ohio River Floodplain, vicinity of Upper Salem Road, about 2 miles northwest of Metropolis & 8 miles northeast of Joppa. Joppa 7.5' topo quadrangle.