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<br /> ...... - <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />~ ".- <br /> <br />.. <br /> <br />"- <br /> <br />-.... -.-. <br /> <br />Protection <br /> <br />Known capacity <br /> <br />More efficient flow <br /> <br />Open space <br /> <br />. <br /> <br />Control of sedimentation <br /> <br />Provision for urban runoff <br /> <br />FLOW QUANTITIES <br /> <br />Sub-basin 1 consisting of 14.53 square miles is the major drainage <br /> <br />basin. All the discharge from this basin must pass under an existing <br /> <br />CRI&P RR bridge. The creek between the railroad bridge and Palmer <br /> <br />Park Blvd is now a meandering stream which must be channelized due to <br /> <br />imminent development in the area. <br /> <br />Sub-basin 2 consists of 0.8 square miles of land. This sub-basin <br /> <br />drains under a second CRI&P RR bridge and joins the main creek bed just <br /> <br />south of the railroad. As shown below, the peak discharge from this <br /> <br />sub-basin will pass Palmer Park Blvd before the peak discharge fr~ lub- <br /> <br />basin 1. <br /> <br />Flow quantities are for the peak discharge at Palmer Park Blvd. Peak <br /> <br />discharges are given for storms 0$ 50 year frequency, 100 year frequency <br /> <br />and for the "Standard Project Flood" type storm. "Standard Project <br /> <br />Flood" is a term used by the US Army Corps of Engineers for its Flood <br /> <br />Plain Information studies. This is a flood that can be expected from <br /> <br />the most severe combination of meteorological and hydrological con- <br /> <br />ditions that is considered reasonably characteristic of the geographic <br /> <br />area, excludinll rare combinations. Floods larger than a Standard <br /> <br />Project Flood are possible but not probable. <br /> <br />3 <br /> <br />; <br />