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~hapter x-a 1. Residences. Where existing streets, utilities, and small lot sizes preclude the use of fill, other methods of elevating the first floor (including basements) above the regulatory flood protection elevation may be authorized provided that the residence is floodproofed in accordance with the state building code. 2. other structures. commercial, manufacturing, and industrial struct~res shall ordinarily be elevated on fill so that their first floor (including basement) is above the regulatory flood protection elevatLQn but may in special circumstances be floodproofed in accordances with the state building code. structures that are not elevated to above the regulatory flood protection elevation shall be floodproofed to FP-l or FP-2 classification as defined by the state building code. Structures floodproofed to FP-3 of FP-4 classification shall not be permitted. c. Standards for Flood: Fringe Uses 1. Residential uses. Residences that do not have vehicular access at or above, an elevation not more than two (2) feet below the regulatory flood protection elevation\shall not be permitted unless granted a variance by the city council. In granting a variance the counci,l shall specify limitations on the period of use or occupancy of the residence. 2. Commercial uses. Accessory land uses, such as yards, rail- road tracks, and parking lots may be at elevations lower than the regulatory flood protection elevation. However, a permit for such facilities to be med by the general public shall not be granted, in the absence of a flood warning system that provides adequate time for evacuation if the area is inundated to a depth greater than two (2) feet or subject to flood velocities greater than four (4) feet per second upon the occurrence of the regional flood. 3. Manufacturing and industrial uses. Measures shall be taken to minimize interference with normal plant operations especially for streams having protracted flood durations. Certain accessory land uses such as yards and parking lots may be at lower elevations subject to requirements set out in section 10-050 c.2. above. In considering permit applications, due consideration shall be given to needs of an industry whose business requires that it be located in floodplain ar~2S.