(a) A copy of the ordinances relating to the management of bridges and viaducts and the signals for opening and closing the same shall be posted up in the pilot house of every tug employed in navigating the Cuyahoga River or old river bed. The Harbor Master is hereby instructed to furnish, upon application, a printed copy of the same to the master of any such tug.
(b) As used in this chapter “bridge” means all structures usually classed as bridges or viaducts.