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1 (3) All structures must be constructed with electrical, heating, ventilation, plumbing, and air
<br />2 conditioning equipment and other service facilities that are designed and/or located so as to
<br />3 prevent water from entering or accumulating within the components during conditions of
<br />4 flooding.
<br />5 (4) As -built elevations for elevated or floodproofed structures must be certified by ground
<br />6 surveys and flood -proofing techniques must be designed and certified by a registered
<br />7 professional engineer or architect as specified in the general provisions of this subdivision and
<br />8 specifically as stated in section 117-189.
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<br />10 923 Floodway District (FW)
<br />11 (A) Permitted uses. The following uses, subject to the standards set forth in [section] 117-183(b), are
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<br />permitted uses if otherwise allowed in the underlying zoning district or any applicable overlay
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<br />district:
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<br />(1)
<br />General farming, pasture, grazing, outdoor plant nurseries, horticulture, truck farming,
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<br />forestry, sod farming, and wild crop harvesting.
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<br />(2)
<br />Industrial -commercial loading areas, parking areas, and airport landing strips.
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<br />(3)
<br />Open space uses, including but not limited to private and public golf courses, tennis courts,
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<br />driving ranges, archery ranges, picnic grounds, boat launching ramps, swimming areas, parks,
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<br />wildlife and nature preserves, game farms, fish hatcheries, shooting preserves, hunting and
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<br />fishing areas, and single or multiple purpose recreational trails.
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<br />(4)
<br />Residential lawns, gardens, parking areas, and play areas.
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<br />(5)
<br />Railroads, streets, bridges, utility transmission lines and pipelines, provided that the
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<br />department of natural resources' area hydrologist is notified at least ten days prior to issuance
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<br />of any permit, and that the standards in [sections] 117-183(d)(1), 117-183(d)(3) and 117-
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<br />183(d)(6) are met.
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<br />(B) Standards for floodway permitted uses:
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<br />(1)
<br />The use must have a low flood damage potential.
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<br />(2)
<br />With the exception of the uses listed in [section] 117-183(a)(5), the use must not obstruct
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<br />flood flows or increase flood elevations and must not involve structures, fill, obstructions,
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<br />excavations or storage of materials or equipment.
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<br />(3)
<br />Any facility that will be used by employees or the general public must be designed with a flood
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<br />warning system that provides adequate time for evacuation if the area is inundated to a depth
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<br />and velocity such that the depth (in feet) multiplied by the velocity (in feet per second) would
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<br />exceed a product of four upon occurrence of the regional (one percent chance) flood.
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<br />(C) Conditional uses. The following uses may be allowed as conditional uses following the standards
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<br />and
<br />procedures set forth in section 117-189(d) of this subdivision and further subject to the
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<br />standards set forth in section 117-183(d), if otherwise allowed in the underlying zoning district or
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<br />any
<br />applicable overlay district.
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<br />(1)
<br />Structures accessory to the uses listed in section 117-183(a) and the uses listed in subsections
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<br />(c)(2) through (9) below.
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<br />(2)
<br />Extraction and storage of sand, gravel, and other materials.
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<br />(3)
<br />Marinas, boat rentals, docks, piers, wharves, and water control structures.
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<br />(4)
<br />Storage yards for equipment, machinery, or materials.
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<br />(5)
<br />Placement of fill or construction of fences that obstruct flood flows. Farm fences, as defined
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<br />in section 117-1, are permitted uses.
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<br />(6)
<br />Travel -ready recreational vehicles meeting the exception standards in section 117-188(b)(2).
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<br />(7)
<br />Levees or dikes intended to protect agricultural crops for a frequency flood event equal to or
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<br />less than the ten-year frequency flood event.
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<br />(D) Standards for floodway conditional uses:
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