(A) The standards for permitted uses in the flood fringe, listed in § 152.051(C) through (H), apply to all conditional uses.
(B) All areas of non-residential structures, including basements, to be placed below the regulatory flood protection elevation must be flood proofed in accordance with classifications in the State Building Code. Structurally dry flood proofing must meet the FP1 or FP2 flood proofing 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. A floodproofing certification consistent with § 152.111(C) shall be required.
(C) The placement of more than one thousand (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 (1%) chance flood event.
(2) The plan must be prepared and certified by a registered professional engineer or other qualified individual acceptable to the City Council.
(3) The plan may incorporate alternative procedures for removal of the material from the flood plain if adequate flood warning time exists.
(D) 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 (1) side of the structure;
(2) It is designed to internally flood; and
(3) It is used solely for parking of vehicles, building access or storage.
(E) These alternative elevation methods are subject to the following additional standards:
(1) Above-grade, fully enclosed areas such as crawl spaces or tuck under garages must be designed to internally flood and include a minimum of two (2) openings on at least two (2) sides of the structure. The bottom of all openings shall be no higher than one (1) foot above grade, and have a minimum net area of not less than one (1) square inch for every square foot of enclosed area subject to flooding unless a registered professional engineer or architect certifies that a smaller net area would suffice.
(2) Floodproofing certifications consistent with § 152.111(C) shall be required. The structure shall be subject to a deed-restricted non-conversion agreement with the issuance of any permit.
(Ord. 481, passed 2-16-2021)