When any vessel or watercraft or obstruction has been sunk or grounded, or has been delayed in such manner as to stop or seriously interfere with or endanger navigation, moored boats or any harbor vessels, the port director may order the same immediately removed, and if the owner or other person in charge thereof after being so ordered does not proceed immediately with such removal the port director may take immediate possession thereof and remove the vessel or watercraft or obstruction, using such methods as in the port director’s judgment will prevent unnecessary damage to such vessel or watercraft or obstruction, and the expense incurred by the port director in such removal shall be paid by such vessel or watercraft or obstruction or the owner or other person in charge thereof; and in case of failure to pay the same, the city may maintain an action for the recovery thereof. [Ord. 17-11 § 2.]