2015-11-02 P & Z Packet - Laserfiche WebLink

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4.32 Extraction and storage of sand,gravel,and other materials. 4.33 Marinas, boat rentals,docks, piers,wharves,and water control structures. 4.34 Storage yards for equipment, machinery,or materials. 4.35 Placement of fill or construction of fences that obstruct flood flows. Farm fences, as defined in section 2.918,are permitted uses. 4.36 Travel-ready recreational vehicles meeting the exception standards in Section 9.3. 4.37 Levees or dikes intended to protect agricultural crops for a frequency flood event equal to or less than the 10-year frequency flood event. 4.4 Standards for Floodway Conditional Uses: 4.41 All Uses. A conditional use must not cause any increase in the stage of the 1%chance or regional flood or cause an increase in flood damages in the reach or reaches affected. 4.42 Fill;Storage of Materials and Equipment: (a) The storage or processing of materials that are,in time of flooding,flammable,explosive, or potentially injurious to human,animal,or plant life is prohibited. (b) Fill,dredge spoil,and other similar materials deposited or stored in the floodplain must be protected from erosion by vegetative cover, mulching, riprap or other acceptable method. Permanent sand and gravel operations and similar uses must be covered by a long-term site development plan. (c) Temporary placement of fill,other materials,or equipment which would cause an increase to the stage of the 1%percent chance or regional flood may only be allowed if the City Council has approved a plan that assures removal of the materials from the floodway based upon the flood warning time available. 4.43 Accessory Structures: (a) Accessory structures must not be designed for human habitation. (b) Accessory structures, if permitted, must be constructed and placed on the building site so as to offer the minimum obstruction to the flow of flood waters: (1) Whenever possible,structures must be constructed with the longitudinal axis parallel to the direction of flood flow;and (2) So far as practicable,structures must be placed approximately on the same flood flow lines as those of adjoining structures. (c) Accessory structures must be elevated on fill or structurally dry floodproofed in accordance with the FP-1 or FP-2 floodproofing classifications in the State Building Code. All floodproofed accessory structures must meet the following additional standards: (1) The structure must be adequately anchored to prevent flotation,collapse or lateral movement and designed to equalize hydrostatic flood forces on exterior walls; and (2) Any mechanical and utility equipment in the structure must be elevated to or above the regulatory flood protection elevation or properly floodproofed. (d) As an alternative,an accessory structure maybe internally/wet floodproofed to the FP-3 or FP-4 floodproofing classifications in the State Building Code, provided the accessory structure constitutes a minimal investment and does not exceed 576 square feet in size. A August 2015 7