The lower portion of the Upper Magothy River encompasses the area beginning at Windless Point, at or near Lat. 39° 4.895' N., Long. 76° 31.048' W., then running 333° (True) to Steedman's Point, at or near Lat. 39° 5.093' N., Long. 76° 31.178' W., and downstream of a line beginning at Magothy Bridge Road, at or near Lat. 39° 6.5700' N., Long. 76° 32.477' W., then running 254° (True) to a point, at or near Lat. 39° 6.5670' N., Long. 76° 32.492' W. This area has a 6-knot speed limit all year. The upper portion of the Upper Magothy River encompasses the area upstream of a line beginning at Magothy Bridge Road, at or near Lat. 39° 6.5700' N., Long. 76° 32.477' W. This area has a minimum wake zone all year.