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• Culvert No: C-2 <br /> Size ~ Type: 18" CMP <br />Discription: Small catch drainage in Pit 1 <br />Peak Discharge: 10(1.12)(1.03) = 11.54 cfs <br />Entrance Type: Projecting <br />From nomograph, get D = 2.2 <br />HW = 2.2(18) = 3.96" = 3.3' <br />HW - D = 3.3 - 1.5 = 1.8" <br />Provide embankment slope stability and embankment erosion <br />protection by placing riprap 1.8' above and around culvert <br />entrance. No damage can occur upstream from the temporary <br />impoundment caused by this headwater. <br />l • <br />~. <br />v-aoM <br />