The Authority shall examine, or cause to be examined, all the docks, public or private, upon the waters of Charleston bay and harbor and the rivers and creeks flowing therein. When it is the opinion of the Authority that any such dock is not in a proper condition for the purposes for which it was designed and used, it shall cause a notice to be served upon the owner or occupier of such dock and he shall deepen such dock and if such owner or occupier shall neglect or refuse to attend to such dock after thirty days’ notice, such person so offending shall forfeit and pay twenty dollars and the further sum of five dollars for every day he shall so neglect or refuse and shall, moreover, pay all expenses incurred by reason of such neglect or refusal.