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, the city 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 city may take immediate possession thereof and remove the same, using such methods as in her or his judgment will prevent unnecessary damage to such vessel or watercraft, or obstruction. The expense incurred by 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. 5956 § 10, 2010; 1961 code § 13.09.100.)