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1301.05 1301.05 b. As an alternative to elevation on fill, owners of accessory structures in the flood fringe that constitute a minimal investment and that do not exceed five hundred (500) square feet in area may flood proof such structures according to the following standards: (1) Owners shall not intend, design, nor construct accessory structures for human habitation. (2) Accessory structures must be elevated on fill or structurally dry flood proofed according to the FP-1 or FP-2 flood proofing classifications in the Minnesota State Building Code. As an alternative, an owner may flood proof an accessory structure to the FP-3 or FP-4 flood proofing classification in the Minnesota State Building Code. For a detached garage, the owner must use the detached garage solely for parking of vehicles and limited storage. All flood proofed accessory structures must meet the following additional standards: (a) Accessory structures must be adequately anchored to prevent flotation, collapse or lateral movement of the structure and shall be designed and constructed to equalize hydrostatic flood forces on exterior walls; (b) All mechanical and utility equipment in the accessory structure must be elevated to or above the regulatory flood protection elevation or properly flood proofed; and (c) To allow for the equalization of hydrostatic pressure, there must be a minimum of two (2) "automatic" openings in the outside walls of the accessory structure having a total net area of not less than one (1) square inch for every square foot of enclosed area subject to flooding. There must be openings on at least two (2) sides of the structure and the bottom of all openings must be no higher than one (1) foot above the lowest adjacent grade to the structure. Using human intervention to open a garage door before flooding will not satisfy this requirement for automatic openings. C. The cumulative placement of fill on a parcel where at any one time is in excess of one thousand (1,000) cubic yards shall be allowed only as a conditional use, unless said fill is specifically intended to elevate a structure to meet the requirements of Section 1301.05, subdivision 2 of this Chapter. d. Property owners and users shall store or park any materials or equipment on fill to an elevation at or above the regulatory flood protection elevation. e. The provisions of Section 1301.05, subdivision 5 of this Chapter shall apply. City of Mounds View