03-13-2017 Council Packet - Laserfiche WebLink

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The following uses and activities may be allowed as conditional uses, if allowed in the underlying zoning district(s) or any applicable overlay district, following the procedures in section 78-1148 of this article. (1) Any structure that is not elevated on fill or floodproofed in accordance with sections 78-1125(a) and (b) of this article. (2) Storage of any material or equipment below the regulatory flood protection elevation. (3) The cumulative placement of more than 1,000 cubic yards of fill when the fill is not being used to elevate a structure in accordance with section 78-1125(a) of this article. (4) The use of methods to elevate structures above the regulatory flood protection elevation, including stilts, pilings, parallel walls, or above -grade, enclosed areas such as crawl spaces or tuck under garages, shall meet the standards in section 78-1127(f). Sec. 78-1127. - Standards for flood fringe conditional uses. (a) The standards listed in sections 78-1125(d) through (j) to all conditional uses. (b) Basements, as defined by section 78-1118 of this article, are subject to the following: (1) Residential basement construction is not allowed below the regulatory flood protection elevation. (2) Non-residential basements may be allowed below the regulatory flood protection elevation provided the basement is structurally dry floodproofed in accordance with section 78-1127(c) of this article. (c) Where lot size constraints prevent the fill elevation from extending 15 feet beyond the structure, a reduction in the fill extension may be allowed for lots less than 65 feet wide, provided the lots were established prior to October 26, 1978, the initial establishment of a floodplain ordinance. (d) All areas of nonresidential structures, including basements, to be placed below the regulatory flood protection elevation must be floodproofed in accordance with the structurally dry floodproofing classifications in the state building code. Structurally dry floodproofing must meet the FP1 or FP2 floodproofing classification in the state building code, which requires making the structure watertight with the walls substantially impermeable to the passage of water and with structural components capable of resisting hydrostatic and hydrodynamic loads and the effects of buoyancy. (e) The placement of more than 1,000 cubic yards of fill or other similar material on a parcel (other than for the purpose of elevating a structure to the regulatory flood protection elevation) must comply with an approved erosion/sedimentation control plan. (1) The plan must clearly specify methods to be used to stabilize the fill on site for a flood event at a minimum of the regional (one percent chance) flood event. (2) The plan must be prepared and certified by a registered professional engineer or other qualified individual acceptable to the city. (3) The plan may incorporate alternative procedures for removal of the material from the floodplain if adequate flood warning time exists. (f) Storage of materials and equipment below the regulatory flood protection elevation must comply with an approved emergency plan providing for removal of such materials within the time available after a flood warning. (g) Alternative elevation methods other than the use of fill may be utilized to elevate a structure's lowest floor above the regulatory flood protection elevation. The base or floor of an enclosed area shall be considered above -grade and not a structure's basement or lowest floor if: 1) the enclosed area is above -grade on at least one side of the structure; 2) it is designed to internally flood and is constructed with flood resistant materials; and 3) it is used solely for parking of vehicles, building access or storage. The above -noted alternative elevation methods are subject to the following additional standards: (1) Design and certification. The structure's design and as -built condition must be certified by a registered professional engineer as being in compliance with the general design standards of the Page 6