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4.3 Commercial Uses. Accessory land uses, such as yards, railroad tracks, and parking lots may be at elevations lower than the Regulatory Flood Protection Elevation. However, a permit for such facilities to be used by the employees or the general public shall not be granted in the absence of a flood warning system that pro- \..� vides adequate time for evacuation if the area would inundate to a depth greater than two (2) feet or be subject to flood veloc- ities greater than four (4) feet per second upon occurrence of the regional flood. 4.4 Manufacturing and Industrial Uses. Measures shall be taken to minimize interference with normal plant operations especially along 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 4.3 above. In consider- ing permit applications, due consideration shall be given to needs of an industry whose business requires that it be located in flood plain areas. 4.5 Fill. Any fill deposited in the Flood Plain District shall be no more than the minimum amount necessary to conduct a Conditional Use listed in Section 3.2. The effects of any fill on the stage of the regional flood shall be analyzed as required by Section 6.3. Fill shall be protected from erosion by vegetative cover. 4.6 Storage of Materials and Equipment. 4.61 The storage or processing of materials that are, in time of flooding, flammable, explosive, or potentially injur- ious to human, animal, or plant life is prohibited. 4.62 Storage of other materials or equipment may be allowed if readily removable from the area within the time avail- able after a flood warning. 4.7 Public Utilities. All public utilities and facilities such as gas, electrical, sewer, and water supply systems to be located in the flood plain shall be flood-proofed in accordance with the State Building Code or elevated to above the Regulatory Flood Protection Elevation. 4.8 Public Transportation Facilities. Railroad tracks, roads, bridges to be located within the Flood Plain District shall comply with Section 4.1. Elevation to the Regulatory Flood Protection Elevat- ion shall be provided where failure or interruption of these tran- sportation facilities would result in danger to the public health or safety or where such facilities are essential to the orderly functioning of the area. Minor or auxiliary roads or railroads may be constructed at a lower elevation where failure or interrupt- ion of transportation services would not endanger the public health or safety. 5.0 SUBDIVISIONS IN THE FLOOD PLAIN DISTRICT No land shall be subdivided which is held unsuitable by the City of Lino Lakes for reason of flooding, inadequate drainage, water supply or sewage treatment facilities. All lots within the Flood Plain District shall contain a building site at or above the Regulatory Flood Protection