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<br />depths associated with this flooding were determined using <br />Manning's "nn equation. <br /> <br />Approximate 100-year flood elevations for the Blue River (above <br />Blue River) were determined using inlet control charts and normal <br />depth at road crossings and normal depth calculations for typical <br />stream cross sections. <br /> <br />, <br /> <br />A floodway waS not computed for Meadow Creek since it is not <br />appropriate due to the wetland habitat of the area. In addition, <br />the floodway was computed for French Gulch by considering the <br />entire 100-year peak discharge. <br /> <br />The Dillon Reservoir base (lOO-year) flood elevation was <br />determined to be 9,018.1 National Geodetic Vertical Datum of <br />1929, and controls the flooding at the mouths of the Blue River, <br />Tenmile Creek, Meadow Creek, and Miners Creek. <br /> <br />For each stream studied in detail, the boundaries of the 100- and <br />500-year floods, as applicable, have been delineated, using the <br />flood elevations determined at each cross section, on topographic <br />maps at scales of 1:1,200 (References 34 and 35); 1:2,400 <br />(Reference 36); 1:24,000 (References 37 and 38); and 1:4,800 <br />(Reference 39). <br /> <br />'. <br /> <br />33 <br />