1163.08  FLOODWAYS.
   Permitted uses in any district shall not encroach upon the relatively flat land adjoining watercourses of the Cuyahoga River, Plum Creek, Fish Creek and Break neck Creek drainage areas, and subject to overflow therefrom. No construction, storage or fill shall be permitted which would cause increase in the height or velocity of floods, downstream damage of property, pollution of the watercourse or health hazards on the premise.