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does not exist, or where the path of flooding is unpredictable and where velocity flow may be <br />evident. Such flooding is usually characterized as sheet flow. In these areas, the following provisions <br />apply: <br />New construction. substantial improvements <br />of residential structures and manufactured homes within AO Zones. <br />shall have the lowest floor (including basements: _._ -.._e I ___1 _. ) elevated <br />above the highest grade adjacent to the building, one foot or more above the depth <br />number specified in feet on the FIRM (at least two feet above the highest adjacent grade to <br />the structure if no depth number is specified). <br />a,b.Anv interior or exter or bui,lding utility systems must, be elevated or e -foot or rnorp abode <br />the de .Ii numI gg(.5ppcified in feet on the FIF�M (at least two feet above the hrghest <br />adiacent arade to .the struCtqrpif gpdepth number rs sgi Cifiei�)wdh the exce ion of utility <br />meter5_and equ rnent_ � ec fically des__ Lne tca withstand inundation_ac.cordinatp the <br />sl_andards ofAhe_I _tgrnataaiial, ResidentiairCodes and the WK. <br />2. New construction and substantial improvements of nonresidential structures within AO Zones <br />shall either: <br />a. Have the lowest floor (including basement) elevated above the highest adjacent grade of <br />the building site, one foot or more above the depth number specified on the FIRM (at least <br />two feet if no depth number is specified); or <br />b. Together with attendant utility and sanitary facilities, be completely flood -proofed to or <br />above that level so that any space below that level is watertight with walls substantially <br />impermeable to the passage of water and with structural components having the capability <br />of resisting hydrostatic and hydrodynamic loads and effects of buoyancy. If this method is <br />used, compliance shall be certified by a registered professional engineer or architect as <br />in KCC 14.08.270(3). <br />Require adequate drainage paths around structures on slopes to guide floodwaters around and <br />away from proposed structures, <br />4. Keneaoi nai venicies placea on sites within ACD zgnes on the communit tlRM either: <br />a. 8g orz thQ_site.for fewer_thanconsetutry a r <br />b. 132 fully licensed,aild�rgacly fg� high�va -u e,_on its wh e„IL o! `p ki:r1cystem, is attached to <br />the_site on_ly_by quick disconnect type utilities and security devices, and has no <br />pgrmanently attached additions: or <br />c. __Gleet the requirements of subsections (1) and (3) above and the anchoring re u+rements for <br />manufactured domes Section 14.08190(2). <br />(Ord, 2014-015.2014; Ord. 2009-25r 2009, Ord. 2001-03; Ord. 93-18 § 5.5, 1993. Formerly 14.08.320) <br />14.08.315 Standards for filling, grading in floodplain. <br />Filling, grading or other activity that would reduce the effective storage volume shall be mitigated by <br />creating compensatory storage on-site, or off-site if legal arrangements can be made, to assure that <br />the effective compensatory storage volume will be preserved overtime; provided, however, that no <br />increased upstream or downstream flood hazard shall be created by any fill authorized in the <br />floodplain by this chapter or other applicable chapters. (Ord. 2011-013.2011) <br />14.08.320 Standards for AE and Al -30 Zones with Base Flood Elevations but No Floodways. <br />In areas with base flood elevations (but a regulatory flood way has not been designated), no new <br />