Laserfiche WebLink
a e rd b.,r m i ¢rg �" ",t� a ' r s 'y S <br /> E ems t �- � a a_a � ;' sr 4 � . <br /> F � <br /> f. t t o yw <br /> 2 r <br /> I ��foxS Stormwater ate[ Detention :i .*lz k _4„:1 & ,,'Al <br /> The Santa Barbara Urban Hydrograph (SBUH)method with Type lA storms was used with the ' "` I <br /> SLarmShed computer program to calculate the peak flows and volumes of the various storms, ,,,,, <br /> outlet orifice sizes in the control structure,and required detention volumes. A factor of safety of ' <br /> 1.2 tiros the calculated detention volume was used to size the detention pipe. The calculated ' 4`.`" '`f'=N <br /> detention volume is 610 cubic feet. The required volume using the factor of safety is(610 x 1.2) <br /> i 732 cubic feet. A -foot long,4-foot diameter pipe detention system is provided. The system <br /> provides a detention volume of 754 cubic feet. The stormwater detention calculations and riser <br /> overflow sizings shown in Appendix D and Appendix E,respectively. '''i F <br /> One-Quarter Mlle Downstream inventory <br /> i z <br /> 1 'The storrnwatcr will be released from the control structure into the new 12-inch pipe system. <br /> along the 100th Place SE. The stormwater will flow west in the pipe for about I30 feet before it " z <br /> daylights into the existing drainage ditch. The ditch is part of the Silver Lake drainage. <br /> 4 ) <br /> .-,z ,: ,. <br /> bjrt2lepkel\02741ydrautics\HydrauiicR rt...doc'jld-sift K. <br /> :4:1f_ <br /> :a <br /> ±yea <br /> TAT"_'{} <br /> Ibillet COMOry CA Dayton) <br /> F itspot 3- Reid ,lid lleton <br /> t. <br />