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<br />'I <br /> <br />Tne ~rea between the flo~dwdY and the ~ounddry of the lOO-year flood is termed the <br />floodwayfrlnge. Areas in the floQdway fringe can be developed as long as dccepted <br />floodproofing techniques dre used, (such as filling these areas one foot a Dove the <br />100-yedr '~ater surface). <br /> <br />The f100dWdY calculated for the Spring Cr-eek floodplain used the criterion of en~ <br />crodchment toa 1;2 foot rise in the lOO-yearwatersurfdce. (For full development <br />conditions). This criteria is consistent with Fort Collins flooctplain regulations. <br />and with criteria used in the flood Insurance St~dy, City of Fort Collins (Refer- <br />enc(25). The f\oodwaypresented in this 5tl.Kiywas computed on the basis ofequ al <br />conveyance reduction from each side of the floodplain. The results of these compu- <br />tdtio.ns were tabulated (See T~ble 8) ~t selected cross sections throughout the <br />study rea~h. <br /> <br />r100dWdY ~'idths"ere determined at cross-section~; bet....een cr'os~-se,-tion> tI,\~ ~oun<.l- <br />dries w~rc: intcrpo 11 dted. III Cdses where t);e boundari es of the flaadw~y and the <br />100-yedr flood dre eJther close together or Co.l ine~r. only the r100dwilJ boundary <br />h",IJ,'.."choWfl. <br /> <br />-23- <br />