The Upper Middle River encompasses the area beginning at a point at or near Lat. 39° 18.507' N., Long. 76° 24.101' W., then running 202° (True) to a point, at or near Lat. 39° 17.964' N., Long. 76° 24.386' W.; and downstream of a line beginning at Martin Lagoon and Cow Pen Creek at or near Lat. 39° 19.382' N., Long. 76° 25.783' W., then running 48° (True) to a point, at or near Lat. 39° 19.443' N., Long. 76° 25.695' W. This area has a 6-knot speed limit Saturdays, Sundays, and State holidays, during the boating season.
Md. Code Regs. 08.18.14.03