08-16-2004 Planning Packet - Laserfiche WebLink

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b. Any mechanica! and utility equipment in a strucUirc must be elcv-aicd to or above the regulatory flood protection elex-ation or properly flood proofed: and c. To allow for the equalization of hydrostatic pressure, there must be a minimum of two "automatic” openings in the outside w alls of the structure haxing a total net area of not less than one square inch for every square foot of enclosed aiea subject to flooding. Thac must be openings on at least two sides of the structuic and the bonom of all openings must be no higher than one fool above the lowest adjacent grade to the structure. Using human interx'ention to open a garage door prior to flooding w ill not satisfv this requirement for automatic openings (0 Storage of Materials and Equipment. 1. The storage or processing of mater lals Ural are. m time of Hooding, tlammablc. c.xplosive. or potentially injurious to human, animal, or plant life ts piohibiied. 2. Storage of other malerials or equipment may be allowed if readily removable from the area within the time available after a flood warning and in accord.incc with a plan approved by the City Council. (g) Flood Control Structural works for flood control that will change the course, current or cros> HTction of protected wetlands or public waters shall be subject to the provisions of Minnesota Statute Chapter 1030 Community-wide structural works for flood control intended to remove areas from the regulatory flood plain shall not be allowed in the floodway (h) A levee, dike or floodwall constructed in the floodway shall not cause an increase to the 100- y«mr or regional flood and the technical analysis must assume equal conveyance or storage loss on both sides o; a stream DIVISION 5 FLOOD FRINGE DISTRICT (FF> Sec. 78-1118 Permillcd I'scs (a) The uses listed in Section 78-1114 of this Ordinance shall be permitted uses (b) All other permitted uses shall be those uses of land or structures listed as permitted uses in the underlying zoning use district(s) If no prc-c.xisting. underlying zoning use districts exist, then anv residential or non residential structure or use of a structure or land shall be a permitted use in the Flood Fringe District provided such use docs not constitute a public nuisance. All permitted uses shall complv with standards for Hood Fringe District "Permitted Uses" listed in Section ”S-1 119 and the ' SianJatds for all Flood Fringe Uses" listed in Section 7g-l 122. See. 78-1119 Standards for Flood Fringe Pcrmilled Uses (a) All structures, including accessory stracturcs. must be elevated on fill so that the lowest floor includmg basement floor is at or above the regulatory flood protection elev ation. The finished fil! elevation lor structures shall be no lower than one (1) fool below the regulatory flood protection elevation and the fill S Diunct! stop to 200J 9- shall extend at such elevation at least fifteen (15) feet beyond the outside limits of the structure erected thereon. (b) As an alternative to elevation on fill, accessory strucnircs that constirjte a minimal investment and that do not exceed 500 square feet at its largest projection mav be intemallv flood proofed in accordance with Sct.tion 78-1117(c)(3). (c) The cumulative placement of fill where at any one time in excess of onc-fnousand (1.000) cubic yards of fill is located on the parcel shall be allowable only as a conditional isc. unless said fill is specifically intended to elevate a structure in accordance wuh Section 78-11 19ri) of this ordinance (d) The storage of any materials or equipment shall be elevated on fill to the regulatory flood protection elevation. (e) The provisions of Section 78-1122 of this Ordinance shall apply. See. 78-1120 Conditional Uses Any structure that is not elevated on fill or flood pioofed m accordance with .Seciion 7S-1119(a) - (b) and or any use of land that docs not comply with the standards in Section 78-1 1 19(c) and (d) shall only be allowable as a conditional use. An application for a conditional use shall be subjeci to the standards and criteria and evaluation proccdure.s specified in Sections 7S-1121 - 78-1122 and 78-1135 of this Ordinance. Sec. 78-1121 Standards for Flood Fringe Conditional Uses (1) 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. These ahcmaiivc methods may include the use of stilts, pilings, parallel walls, etc., or above-grade, enclosed areas 'uch as crawl spaces or luck under garages. The base or floor uf an endowed area shall be considered above-grade and not a structure's basement or lowest floor if; I) the enclosed area is abovc-gradc on ai least one side of the structure: 2) it is designed to intemallv flood and IS constructed with flood resistant materials, and 3) il is used solely for parking of vehicles, building access or storage. The abovc-nolcd alternative elevation methods are subject to fnc following additional standards: a. Design and Ccnification - The snuctorc's design and as-built condition must be certified by a registered professional engineer or architei *s being in compliance with the general design standards of the State Budding Coflv and. specifically, that all electrical, heating, ventilation, plumbing and air conditioning equipment and other service facilities must be at or above the regulatory flood protection elevation or be designed lo prcveni flood water from entering or accumulating within these components during limes of flooding. b. Specific Standards for Above-grade, Enclosed Areas - Above-grade, fully enclosed areas such as crawl spaces or tuck under garages must be devigned to internally flood and the design plans must stipulate. 1. A minimum area of openings in the w alls where internal flooding is to be used as a flood proofing technique. There shall be a minimum of two openings on at least two sides of the structure and the bottom of all openings 3 DtSUict-l Alep t/l/2094 ftyutot - 10-