2015-11-02 P & Z Packet - Laserfiche WebLink

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Ordinance Language Commentary 5.2. If no pre-existing,underlying zoning districts exist,then any residential or can be deleted. nonresidential structure or use of a structure or land is a permitted use provided it does not constitute a public nuisance. 5.2 Standards for Flood Fringe Permitted Uses: 5.21 All structures,including accessory structures,must be elevated on fill "lowest floor"is defined as the lowest floor so that the lowest floor,as defined,is at or above the regulatory flood of the lowest enclosed area,including protection elevation. The finished fill elevation for structures must be basements,crawl spaces,etc. See Section no lower than one foot below the regulatory flood protection 2.926. elevation and the fill must extend at the same elevation at least 15 feet beyond the outside limits of the structure. (a)clarifies that ductwork must be elevated (a) All service utilities, including ductwork,must be elevated or because it is seldom water-tight which water-tight to prevent infiltration of floodwaters. results in health hazards due to mold and (b) As an alternative to elevation on fill,an accessory structure that mildew after flooding. constitutes a minimal investment and that does not exceed 576 (b)If an accessory structure exceeds 576 square feet in size may be internally floodproofed in accordance square feet, then FEMA will not allow internal with Section 4.43. floodproofing,and the structure must be 5.22 The cumulative placement of fill or similar material on a parcel must elevated on fill or dryfloodproofed in not exceed 1,000 cubic yards,unless the fill is specifically intended to accordance with Section 4.44(a)—(c). elevate a structure in accordance with Section 5.21 of this ordinance, or if allowed as a conditional use under Section 5.33 below. 5.22 is an optional provision. Treating large 5.23 The storage of any materials or equipment must be elevated on fill to volumes of fill as a conditional use allows the regulatory flood protection elevation. communities to require an erosion control 5.24 The storage or processing of materials that are,in time of flooding, and emergency removal plan for uses such as flammable,explosive,or potentially injurious to human,animal,or sand and gravel mining or dredge spoil plant life is prohibited. storage. 5.25 Fill must be properly compacted and the slopes must be properly protected by the use of riprap,vegetative cover or other acceptable method. 5.26 All new principal structures must have vehicular access at or above an elevation not more than two feet below the regulatory flood Section 5.26 is optional, but is mandatoryfor protection elevation,or must have a flood warning/emergency subdivisions, which include manufactured evacuation plan acceptable to the(Governing Body). home parks and recreational vehicle 5.27 Accessory uses such as yards, railroad tracks,and parking lots may be parks/campgrounds. See also Section 7.13. at an elevation lower than the regulatory flood protection elevation. However,any facilities used by employees or the general public must be designed with a flood warning system that provides adequate time for evacuation if the area is inundated to a depth and velocity such that the depth(in feet)multiplied by the velocity(in feet per second) would exceed a product of four upon occurrence of the regional(1% chance)flood. 5.28 Interference with normal manufacturing/industrial plant operations must be minimized,especially along streams having protracted flood durations. In considering permit applications,due consideration must The Federal Emergency Management Agency be given to the needs of industries with operations that require a (FEMA)has established criteria for removing floodplain location. the flood fringe designation for certain 5.29 Flood fringe developments must not adversely affect the hydraulic structures properly elevated on fill above the capacity of the channel and adjoining floodplain of any tributary regional flood elevation. These standards, watercourse or drainage system. included in Technical Bulletin 10.01,require enhanced management and notification 5.30 Manufactured homes and recreational vehicles must meet the procedures. Contact DNR floodplain staff for July 2015 10