Every person owning property through which a watercourse passes, or the person’s lessee, shall keep and maintain that part of the watercourse within the property free of trash, debris, excessive vegetation and other obstacles that would pollute, contaminate or significantly retard the flow of water through the watercourse. In addition, the owner or lessee shall maintain existing privately owned structures within or adjacent to a watercourse, so that they will not become a hazard to the use, function or physical integrity of the watercourse. (Ord. 1397.18, § 1 (part), 2019)