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<br />SITE A <br /> <br />approximately 100 feet turning due south and crossing an open field to the dirt <br />road mentioned at the Site # 1 - lOOyr protection beginning point. The levee <br />continues on the same alignment as the lOO-yr protection. At southern end of <br />the 100-yr alignment, the 500-yr alignment continues South until it ties into <br />the rail road embankment. The levee then turns back to the northwest and tie <br />in at elevation 1339.5. <br />. The levee is approximately 2500 feet long <br /> <br />Internal Drainace <br /> <br />Ilydrology <br /> <br />Assnmptions <br />. All of the internal area assumed to drain down to the levee <br />. Flow along the levee assumed to go from North to South <br />. The storm sewer system not considered in the analysis <br />. Old rail road embankment assumed to be western boundary <br />. Confirmed basin delineation with storm sewer mapping <br /> <br />Methodolo&>, <br />. Rational Method (TR 55) <br /> <br />Input Variables and Equations <br />. see analysis sheet <br /> <br />Results <br />. 90 cfs total for basin. This result is a maIimum requirement to drain the basin <br />for a 100-yr event. Open roads through the levee system (South 5th Avenue) <br />and existing storm sewer will assist in internal drainage. Additional analysis <br />will be reQ.Uired for final desijpl. <br /> <br />Pipe Sizing <br /> <br />Assumptions <br />. All of the water from the drainage basin is carried by the pipes <br />. No open roadways to assist in internal drainage <br />. Flow of water runs of the west side of the levee from North to South <br />. Pipes are circular RCP <br />. Head = top of pipe <br />. Inlet control <br />. l00-yr Storm (may want to size for different storm during fina1 design) <br /> <br />SITE A - page 3 <br />