Bearwallow Run joins Shingle Mill Run 0.84 miles ( 1.35 km ) upstream of its mouth .
Shingle Mill Run has one named tributary , which is known as Bearwallow Run .
Bearwallow Run joins Shingle Mill Run 0.84 miles ( 1.35 km ) upstream of Shingle Mill Run 's mouth .
Shingle Mill Run has one named tributary , which is known as Bearwallow Run .