Its watershed has an area of 1.02 square miles ( 2.6 km ) .
Bearwallow Run joins Shingle Mill Run 0.84 miles ( 1.35 km ) upstream of its mouth .
Shingle Mill Run 's watershed has an area of 1.02 square miles ( 2.6 km ) .
Bearwallow Run joins Shingle Mill Run 0.84 miles ( 1.35 km ) upstream of its mouth .