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<br />The following table is a summary of the record for six <br />gaging stations in the watershed above Somerset, which includes <br />the Anthracite Creek basin and Muddy Creek basin. Only one <br />station has been installed on Anthracite Creek, and it operated <br />for a combined period of record of 9 years. This short period <br />by itself is not enough to predict the magnitude of the 100-year <br />flood on Anthracite Creek. However, the 19-year record for the <br />gage on East Muddy Creek near Bardine is long enough to develop <br />a log-Pearson type III extreme frequency analysis. This station, <br />at elevation 6,655 feet, is at approximately the same elevation <br />as the study reach. The results of the log-Pearson analysis for <br />this station, as published in CWCB, TM No.1 (Reference 2), <br />are shown below: <br /> <br />. <br /> <br />Station <br /> <br />Dra..inage <br />Area <br /> <br />Discharge <br />QIOO <br /> <br />Period <br /> <br />East Muddy Creek <br />near Bardine <br /> <br />132 s~ mi <br /> <br />2,950 cfs <br /> <br />19 years <br /> <br /> <br />" <br /> <br />Depth <br />DIOO <br /> <br />4.8 ft <br /> <br />By relating the 100-year discharge to the area of the basin, a <br />ratiopof discharge per square mile can be computed. The results <br /> <br />of this analysis worked out to 22 cfs per square mile for the 100- <br />year flood in the adjacent basin. The 100-year discharge for our <br />study site is then estimated by multiplying this ratio times the <br />drainage area, or QIOO = 22 cfsVsq. mi. = 1,870 cfs. <br />X 85 <br /> <br />/2. <br />