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<br />I 76-1 (35) PE <br /> <br />A summary of the above predictions is tabulated below: <br /> <br />PREDICTION METHOD <br /> <br />TABLE II I <br />ABOVE RALSTON CREEK <br /> <br />BELOW RALSTON CREEK <br /> <br />cfs <br /> <br />cfs <br /> <br />Drainage Area Vs. 0 <br />Gages 6-7195, 7200 <br />Total D.A. (Fig. No.3) <br /> <br />Drainage Area Vs. 0 <br />Gages 6-7105, 7195 <br />D.A. < 7500' (Fig. No.4) <br /> <br />7,000 <br />(5000/ 85000 <br /> <br />6,400 <br />(4700/9000) 6 <br /> <br />16,000 <br /> <br />21,000 <br /> <br />Technical Manual No. 1 <br />Weighted with gages <br />6-7195, 7200 (Fig, No.5) <br /> <br />13,500 <br /> <br />16,000 <br /> <br />Federal Ins. Adm. Study <br /> <br />25,000 <br /> <br /> <br />U. S. Corps of Engineers <br /> <br />15,000 - 25,000 <br /> <br />o 95% confidence limits from Bulletin No, 17.3 <br /> <br />CONCLUSION <br /> <br />The selection of the design flood peak was primarily based on Stream <br />Gages 6-7105 and 7195 and Technical Manual No.1. The gages were adjusted <br />to exclude the snow melt areas. The Manual's regression values were <br />weighted to include the Clear Creek gages. The Clear Creek gages and <br />the prediction by the F: LA. served to provide the outer confidence 1 imits. <br /> <br />Selected Design Discharge <br /> <br />Above Ralston Creek 0100 = 14,000 cfs <br />Below Ralston Creek 0100 = 18,000 cfs <br /> <br />Di scharges for 0'10 and 050 are deri ved from 0100 by applyi ng the ratios <br />determined from the "Plains Region" of Technical Manual No.1. <br />See Figure NO.6. <br /> <br />11 <br />