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<br />subwatersheds produce a relatively larger effect. One example of this is along Leyden Creek, The presence <br />of Leyden Lake lowers the peak flow rate from 4,081 cfs to 373 cfs just below the dam, However, further <br />downstream at the mouth, the reduction is only lowered from 4,042 cfs to 2,465 cfs, With Leyden Lake <br />excluded, overbank storage negates any contributions from the lower watershed to the hydro graph from the <br />upper basins, and the peak flow rate at the mouth is actually lower than at Leyden Lake, When the lake is <br />included, it has the effect of attenuating the hydrograph from the upper watershed, However, the peak <br />created by contributions of land below the lake is untouched, The lower watershed contributes to a peak of <br />2,465 cfs with or without the lake in place, However, when the lake is not in place, the peak value of the <br />lower watershed is eclipsed as the hydro graph continues to increase due to contributions from the upper <br />watershed, <br /> <br />Operations of the reservoirs are summarized in Table 9 of Appendix B, This table lists peak inflows and <br />outflows along with the volume stored for each event. <br /> <br />A discharge profile for each design event is shown in Figures 9 through 12 of Appendix A, The profiles <br />extend along the Ralston Creek mainstem from the confluence with Clear Creek to the Arvada/Blunn <br />Reservoir, along Leyden Creek from the confluence with Ralston Creek to Leyden Lake, and along Van <br />Bibber Creek from the Hogback to the confluence with Ralston Creek, <br /> <br />7 <br />