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<br />throughout each split that would allow the flow to traverse between the two channels, <br /> <br />. <br /> <br />Hydraulic Analysis Results <br /> <br />Table 6 identifies a number of notable locations along the study reach and their corresponding <br />water surface elevations, The water surface elevation listed for the bridges is the upstream elevation, <br />This elevation will be considerably higher than the downstream elevation due to backwater effects, <br />The cross sections for the confluence locations are approximately 50 to 200 feet downstream of the <br />actual confluence, See Appendix C for the complete HEC-RAS summary tables, <br /> <br />. <br /> <br /> TABLE 6 <br /> WATER SURFACE ELEVATIONS <br />Location Cross Water Smface Elevations (feet) <br /> Section 10- Year 25-Year 50-Year 100-Year 500- Y ear <br /> (IO%-Chance) (4%-Chance) (2%-Chance) (1%-Chance) (0 .2%Chance) <br />Northern Reservation 2000 6824.2 6824,5 6825,0 6825.6 6826.7 <br />Border <br />Beaver Creek 1780 6558.4 6559.1 6559.4 6559.7 6560.6 <br />Confluence <br />Dry Creek Confluence 1730 6515,1 6516.1 6517.1 6517.7 6519.1 <br />Bear Dance Bridge 1703 6486.2 6487.1 6488.0 6488.6 6489.9 <br />State Route 151 Bridge 1673 6445.5 6447.1 6448.6 6449.9 6452.4 <br />Ute Creek Confluence 1570 6360.4 6360.9 6361.8 6361.6 6363.4 <br />County Road 322 Bridge 1363 6205.4 6206,0 6206.4 6207,0 6208,5 <br />Abandoned RR Bridge 1293 6157.6 6158.8 6160,9 6162.6 6166.5 <br />Southern Reservation 1260 6134.5 6135.2 6135,8 6136,6 6138.5 <br />Border (NM State Line) <br /> <br />Profiles <br /> <br />The HEC-RAS program computed a water surface elevation at each cross section, These <br />elevations were identified as being at sub critical depth, critical depth, or supercritical depth, FEMA <br />guidelines require that water surface profiles represent either critical depth or sub critical depth, In <br />reaches with a super critical flow regime, FEMA guidelines state that the critical water surface <br />elevation will be plotted. Therefore, the mapped water surface elevation is the computed subcritical <br />water surface elevation or the critical water surface elevation <br /> <br />. <br /> <br />This report provides three sets of water surface profiles to assist local agencies with their <br />planning requirements, The first profile set represents the computed water surface elevations and the <br />mapped water surface elevations for the 10- and the I DO-year (10%- and the I %-chance) floods, The <br />15 <br />