A. Landfills, improvements, developments or other encroachments which will, in the opinion of the city engineer, endanger life or property or that will significantly obstruct the natural flow of floodwater within the intermediate regional flood elevation;

B. Storage of floatable substances or materials which will add to the debris load of the watercourse;

C. Excavations that will tend to broaden the floodplain or direct flows out of the natural floodplain. (Ord. 2800 § 8, 1983; prior code § 17.46.140)