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<br />diverted water flowinq west of Interstate HiqhwaV 7C" flows at a hiohor <br /> <br /> <br />elevation than that adjacent to the river channel at rp.ference Doint 99. <br /> <br /> <br />For this reason two reference points are provided for cross sp.ctio~ 3-3. <br /> <br /> <br />Rp.ference point 99 in table A and reference point E in tableqapplv east <br /> <br /> <br />and west of Int~rstate Hiohwav 75 respectively. <br /> <br /> <br />Flood nlain widths "s defined in this rer>ort are fairly unifor." <br /> <br /> <br />throuqh the stU(ly reach. The SPF flood ['lain varies from apnroxiniltely <br /> <br /> <br />4,000 to fi, 000 feet in width uDstream from thp. Great \'Ip.stern Ra i I \'IaV at <br /> <br /> <br />refererlC a pO i nt 130. Oownstrear'l from th i s ['0 i nt, the flood p I a i n narrows <br /> <br /> <br />somewhat to a wi~th rounhly ranninq between 7500 and 4000 feet. <br /> <br />The flood nlain throuohout thp. studv rp.ach remains essp.ntial IV <br /> <br /> <br />undeveloDp.d. Some or"avel Minino oDerations located Mostly uDstroam from <br /> <br /> <br />Interstate lIinhwil" 75 Ilre within the confines ('of the flood plain. ^~jacent <br /> <br /> <br />to reference point 90 additional flood plain develonment annears to be <br /> <br /> <br />occurrinq on the far rinht bank. The balance of the flood nlain annears <br /> <br /> <br />to be in mostlv anricultural use with very little development other than <br /> <br /> <br />that associated with farminq and ranchinn. <br /> <br />Figure 15. Potenti91 flood depths &t the Colorado <br />State Highway 392 bridgE) (reference <br />point 115). May 1974. <br /> <br />Tho followinn Dhotonranhs il lustrato flood denths durinn potential <br />floods at two locations. <br /> <br /> <br />Figure 16. Pot~ntial flood ~epths at a Weld County bridge located at reference <br />point 129. May 1974. <br /> <br />29 <br /> <br />30 <br />