You searched for: 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. Topic Carex Remove constraint Topic: Carex