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SEDCAD 4.0 <br />nv...w+ ~°°o o..w. ~ c.J,..,en <br /> <br />I • <br />The assumptions regarding the extent of the watershed area contributing to SAE-1 are based on diversion <br />of the ephemeral drainage southwest of the disturbed area which ties into the road drainage above Culvert <br />1. See Figure 2.2-4. <br />Material: Riprap <br />Triangu/a~ Channel <br /> h Freeboard Freeboard F <br />~~ <br />Skleslope Sidesb <br />pe Slope(%) MuI <br />Ratlo ~ Ratio Depth (R) °h of Depth ~D) <br />1.5:1 1.5:1 10.0 0.30 <br />PADER Method -Steep Slope Design <br />• <br />• <br />The 10-year, 24 hour peak flow calculation for the ephemeral drainage, 4.85 cfs, is presented in Table <br />3.9-3, Basin H. <br />Appendix M(viii) <br />Ditch H -Operations <br /> w/o Freebcard w/ Freeboard <br />Design Discharge: 4.65 cfs <br />Depth: 0.77 ft ~ 1.07 R <br />Top Wldth: 2.30 R 3.20 R <br />Velodty: 5.50 fps <br />X-Section Area: 0.68 sq ft <br />Hydrautk Radius: 0.319 <br />Froude Number: 1.57 <br />Manning's n: 0.0400 <br />Dmin: 2.00 in <br />D50: 3.00 in <br />Dmax: 4.50 in <br />The above Setlcad calculations show a V-ditch 1.1 feet deep will pass the design flow. Erosion protection <br />is provided by the road base material, <br />.,,oo fC 'LEER'S CERTIFICATION <br />The calculations and infol~o `pf~Sefii~d~q this page were prepared by me during the month of August <br />2003, and the informati~ ~•ted i tf~„~~ ccorrect to the best of my knowledge and belief. <br />~ e <br />tr * ~ ~ ~3 <br />~ ; Ja es E. Stov~ f; Date <br />• stered Profess9~lEngineer <br />mss, ~tqp~ ColoSaQ~o. 19230 <br />SEDCAD Utility Run <br />MU <br />Page M(viii)-4viii <br />Printed 08.064003 <br />New 8/03 <br />