07/10/1995 Council Packet - Laserfiche WebLink

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drainage or result in potential flooding of neighboring properties be flood proofed in accordance with the State Building Code. Structures that are not elevated to above the Regulatory Flood Protection Elevation shall be flood proofed to FP -1 or FP -2 classification as defined by the State Building Code. Structures flood proofed to FP -3 or FP -4 classification shall not be permitted. 2. Commercial, Manufacturing and Industrial. Accessory land uses, such as yards, railroad tracks, and parking lots may be lower elevations. However, a permit for such accessory facilities to be used by the general public shall not be granted, in the absence of a flood warning system, 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. Subdivision 3. Accessory Uses. Accessory structures shall be elevated on fill or structurally dry flood proofed in accordance with the FP -I or FP -2 flood proofing classifications in the State Building Code. As an alternative, an accessory structure may be flood proofed to the FP -3 or FP -4 flood proofing classification in the State Building Code provided the accessory structure constitutes a minimal investment, does not exceed 500 square feet in the size, and for a detached garage, the detached garage must be used solely for parking of vehicles and limited storage. All flood proofed accessory structures must meet the following additional standards, as appropriate: A. The structure must be adequately anchored to prevent flotation, collapse or lateral movement of the structure and shall be designed to equalize hydrostatic flood forces on exterior walls; and B. Any mechanical and utility equipment in a structure must be elevated to or above the Regulatory Flood Protection Elevation or properly flood proofed. C. Whenever possible, structures shall be constructed with the longitudinal axis parallel to the direction of flood flow. D. So far as practicable, structures shall be placed approximately on the same flood flow lines as those of adjoining structures. Subdivision 4. Structural Flood Proofing Standards. Alternative elevation methods other than the use of fill may be utilized to elevate a commercial and industrial structure's lowest floor above the Regulatory Flood Protection Elevation. These alternative methods may include the use of stilts, pilings, parallel walls, etc., or above grade, enclosed areas such as crawl spaces or tuck under garages. The base or floor of an enclosed area shall be considered above grade and not a 16