Laserfiche WebLink
n <br />U <br />• <br />XI <br />Culvert Design <br />There are eight culverts located on the property which act to control <br />surface water (see Exhibit F-F). Seven of these culverts were included in <br />the technical revision included as section 3 of this appendix. Culvert #8 <br />is at the discharge of the overburden spoil collection ditch. <br />Design calculations are shown below: <br />Peak Flow - 89 cfs (see ditch calculations-Ditch #7) <br />Culvert Diameter - 30" <br />Culvert length - 60' <br />"C" Factor - 60 <br />hf = 0.2082 (100) 1.85 q 1.85 (Hazen-Williams) <br />c d 4.8655 <br />hp = friction head (ft/100 ft. of pipe) <br />d = diameter (inches) <br />q = flow (gal/min) (1 cfs = 445.5 gpm) <br />hp = 0.2083 (100) 1.85 (39,650) 1.85 <br />60 30 4.8655 <br />= 11.2 ft/100 ft <br />11.2 x 60 = 6.7 ft. of head required <br />100 <br /> <br />