571—40.13 (462A) Massey Slough. Operation of vessels in Massey Slough of the Mississippi River at Massey Station, Dubuque County, Iowa, extending from a northerly to southerly direction from the upper end to the lower end of the slough, encompassing the water in Section 14, Township 88N, Range 3E of the 5th P.M., tract number NFIA-26M.
	 40.13(1) All boats underway must maintain a speed of less than five miles per hour in said waters.
	 40.13(2) Reserved.