South Creek encompasses all the waters of South Creek and its tributaries southerly of a line beginning at a point at or near the easterly side of Chalk Point, at or near Lat. 38° 50.257' N., Long. 76° 32.230' W., then running 113° (True) to a point, at or near Lat. 38° 50.118' N., Long. 76° 31.813' W., then running 5° (True) to a point, at or near Lat. 38° 50.223' N., Long. 76° 31.802' W.