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<br />I <br />I <br /> <br />as reference points. Photomap index sheet numbers, compatible with <br />cross-section locations, are shown on each water surface profile exhibit. <br /> <br />I <br />I <br /> <br />As a general guide for orientation purposes, the following designa- <br /> <br /> <br />tions are assigned to stream names, photomap, reach, and cross-section <br /> <br /> <br />numbe rs. <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />1 <br />J <br />I <br />I <br />I <br /> <br />Stream Name Photomap Numbers Reach Number Cross Section Number <br />Coal Creek 1-3 1 5-19 <br />Coal Creek 3-6 2 19-35 <br />Coal Creek 6-8 3 35-46 <br />Coal Creek 8-13 4 46-85 <br />Coal Creek 13-15 5 85-100 <br />Rock Creek 8-9, 16-17 6 46-120 <br />Rock Creek 17-20 7 120-138 <br /> <br />Typical Valley Cross Sections <br /> <br />Exhibit B is a selection of typical valley cross sections illu- <br />strating the configuration of stream channels and adjoining flood plain <br />areas. Shown on the cross sections are the elevations and lateral <br /> <br />extent for the 100- and 500-year flood events. <br /> <br />Flood Frequency-Elevation and Discharge Data <br /> <br />I <br />I <br /> <br />Tables 1 through 7 include flood crest elevations and peak dis- <br />charges for the 10-, 25-, 100-, and 500-year floods. Tabulated <br />information is intended for use in conjunction with the water surface <br />profiles and flood hazard area photomaps. The information is compatible <br />with reach numbers and cross section designations. <br /> <br />- 15 - <br />