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<br />DRl\fl <br /> <br /> <br />served as a base. Additionally cross-sections were surveyed <br />specifically for this study, particularily in areas where the <br />topography was known to have changed. Restudies of the flood plain <br />had been conducted for recent developments in the Town of <br />Breckenridge. In this category are the Village at Breckenridge and <br />River Mountain Lodge. Several short sections of river had been <br />surveyed for projects such as pipeline crossings or new bridge <br />construction. This information was also incorporated into the <br />study. Finally, the 1980 Breckenridge Town Topographic mapping was <br />used in areas where it was known that conditions changed between <br />the time of the FEMA study and production of the Breckenridge Town <br />Topographic Mapping. <br /> <br />Flow resistance is characterized by Manning's n. To determine n <br />values, an assessment of the conditions along each channel was <br />made. In areas where channel alterations had not been made, the <br />values from the FEMA study wree found to be appropriate. In <br />general, main channel n values ranged between 0.035 and 0.050. <br />Overbank n values ranged from 0.035 to 0.10. <br /> <br />Results <br /> <br />The water surface levels for the lOO-year flood are plotted on <br />Plates 13 through 25. For comparitive purposes, the FEMA values, <br />or in the case of French Creek, the 1975 Leonard Rice study values, <br />are provided. The flood levels at each cross-section are tabulated <br />in Tables 2.14a through 2.14d. <br /> <br />30 <br />