The following nonconforming uses shall be prohibited within the designated floodway:
(1) a building for living purposes or place of assembly or permanent use by human beings;
(2) a structure or excavation that will cause water to be diverted from the established floodway, cause erosion, obstruct the natural flow of water, or reduce the carrying capacity of the floodway;
(3) the construction or permanent storage of an object subject to flotation or movement during flood level periods.