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9.22 Flood Plain Ordinance Subd. Extraction and storage of sand, gravel, and other materials. Marinas, boat rentals, docks, piers, wharfs, and water control structures. Railroads, streets, bridges, utility transmission lines, and pipelines. Storage yards for equipment, machinery, or materials. Placement of fill. Travel trailers and travel vehicles either on individual lots of record or in existing or new subdivisions or commercial or condominium type campgrounds, subject to the exemptions and provisions of §9.22.09 Subd. 3 of this ordinance. Structural works for flood control such as levees, dikes and floodwalls constructed to any height where the intent is to protect individual structures and levees or dikes where the intent is to protect agricultural crops for a frequency flood event equal to or less than the 10-year frequency flood event. 4 Standards for Floodway Conditional Uses: All Uses. No structure (temporary or permanent), fill (including fill for roads and levees), deposit, obstruction, storage of materials or equipment, or other uses may be allowed as a Conditional Use that will cause any increase in the stage of the 100-year or regional flood or cause an increase in flood damages in the reach or reaches affected. All floodway Conditional Uses shall be subject to the procedures and standards contained in §9.22.10 Subd. 4 of this ordinance. The Conditional Use shall be permissible in the underlying zoning district. Fill: Fill, dredge spoil and all other similar materials deposited or stored in the flood plain shall be protected from erosion by vegetative cover, mulching, rip-rap or other acceptable method. Dredge spoil sites and sand and gravel operations shall not be allowed in the floodway unless a long-term site development plan is submitted which includes an erosion/sedimentation prevention element to the plan. As an alternative, and consistent with Subsection d2 immediately above, dredge spoil disposal and sand and gravel operations may allow temporary, on-site storage of fill or other materials which would have caused an increase to the stage of the 100-year or regional flood but only after the Governing Body has received an appropriate plan which assures the removal of the materials from the floodway based upon the flood warning time available. The Conditional Use Permit must be title registered with the property in the Office of the County Recorder. Accessory Structures: 1. Accessory structures shall not be designed for human habitation. 4/29/92 5 Draft