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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. (h) Interference with normal manufacturing/industrial plant operations must be minimized, especially along streams having protracted flood durations. In considering permit applications, due consideration must be given to the needs of industries with operations that require a floodplain location. (i) Flood fringe developments must not adversely affect the hydraulic capacity of the channel and adjoining floodplain of any tributary watercourse or drainage system. (j) Manufactured homes and recreational vehicles must meet the standards of § 1103.10 of this ordinance. (3) Conditional uses. 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 § 1103.11 (4) of this chapter. (a) Any structure that is not elevated on fill or floodproofed in accordance with § 1103.06 (2)(a) of this chapter. (b) Storage of any material or equipment below the regulatory flood protection elevation. (c) 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 § 1103.06 (2)(a) of this chapter. (4) Standards for Flood Fringe conditional uses. (a) The standards listed in § 1103.06 (2)(d) through (j) apply to all conditional uses. (b) Basements, as defined by § 1103.03 of this chapter, 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 § 1103.06 (4)(c) of this chapter. (c) 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 FP -1 or FP -2 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. Structures wet floodproofed to the FP -3 or FP -4 classification are not permitted. 12 of 25