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<br />floods and the discharge-probability relationships smoothed <br />with an eye-fit curve. The peak flows presented in Table 6 <br />represent these smoothed values. Resulting <br />discharge-probability curves are shown in figures 2 through 8. <br /> <br /> TABLE 6 <br />Peak Flows for Ralston and Leyden Creeks (c. f.s.) <br />Future Development without Leyden Lake <br />Location 2-yr 5-vr 10-yr 50-vr 100-yr 500-yr <br />Ralston Creek <br />d/s Leyden Crk 600 1500 2300 5400 7300 13000 <br />u/s Van Bibber Crk 640 1600 2600 6200 8400 15000 <br />d/s Van Bibber Crk 1100 2600 4100 9000 11700 21000 <br />Mouth 1200 2800 4400 9500 12100 21600 <br />Leyden Creek <br />At Leyden Lake 250 630 1000 2300 3400 5700 <br />Mouth 350 850 1400 3200 4300 7400 <br /> <br />STUDY COMPARISON <br /> <br />1. Comparison with Phase B Report (UDFCD) <br />Results of this analysis were compared to previous <br />studies within the basin and specifically with the Major <br />Drainageway Planning Lower Ralston/Van Bibber and Leyden <br />Creeks Phase B Report (UDFCD, February, 1986). Table 8 <br />presents a comparison of the results of this study with those <br />of the Phase B Report. <br /> <br />TABLE 8 <br />comparison of Results with Previous <br />Urban Drainage and Flood control, Phase B Study <br /> <br /> COE UDFCD Difference <br />Location 100-vr 100-vr c.f.s. Percent <br />Ralston Creek <br />d/s Leyden Crk 7300 7900 600 -8 <br />u/s Van Bibber Crk 8400 9700 1300 -13 <br />d/s Van Bibber Crk 11700 10600 1100 +9 <br />Mouth 12100 11500 600 +5 <br />Leyden Creek <br />At Leyden Lake 3400 3800 400 -10 <br />Mouth 4300 4300 0 0 <br /> <br />9 <br />