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<br />~03-d <br /> <br />-5- <br /> <br />not increase the water surface elevatiohof a flood with a one <br /> <br />percent chance of occurring during any year more than one foot at <br /> <br />any point. Subsequent to floodway designation, which sets encroach- <br />ment limits for floodflow-restricting developments, this requirement <br />need not be met. <br /> <br />I <br /> <br />SECTION 13: New or replacement water supply and sanitary <br /> <br />sewage systems shall be designed and installed to miilimizeor <br />eliminate infiltration of floodwaters into water systems and dis- <br /> <br />charges from sewage systems into floodwaters. On-site waste disposal <br /> <br />systems, which use is permitted, shall be designed, located, and <br /> <br />constructed so as to avoid impairment of them or contamination <br /> <br />from them during flooding. <br /> <br />SECTION 14: Following provision by FIAofda.ta required <br /> <br />therefor, floodways, with encroachment limits for floodflow- <br /> <br />restricting developments, will be designated. Floodways and encroach- <br /> <br />ment limits shall be based on the principle that the delineated <br /> <br />floodwaywill carry the flow of a flood with a one percent chanc~ <br /> <br />I <br /> <br />of occurring during any year without increasing the water-surface <br /> <br />I <br />elevation of that flood mOre than one foot at any point. <br /> <br />SECTION 15: After floodwaydesignation fora specific flood <br /> <br />plain area, no existing nonconforming floodflow-restricting uses <br /> <br />in the floodway shall be expanded. Modification, alteration, or <br />repair may be permitted to incorporate floodproofing provided <br /> <br />such measures will not raise the water-sutface.elevation at any <br /> <br />point of a flood more than one foot at any point with a one percent <br /> <br />chance of occurring during any year. <br /> <br />I <br /> <br />SECTION 16: No fill or other encroachmehts shall be per- <br />mitted with a designated floodway that will impair the ability <br />of the floodway area between encroachment lines to carry and dis- <br />charge the floodflow of a flood with a one percent Chance of <br />occurring during any year unless the effects of such fill or <br />encroachment shall be fully offset bu stream impr9vements. NO <br />unpermitted fill, encroaching development, or change of use within <br /> <br />a designated floodwayshall be made. <br />