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L_ J <br />SOUTH MINE FAN LIGHT USE ROAD CULVERT <br />An 18-inch CMP culvert is required to pass natural drainage from <br />undisturbed areas to the west under the light use road serving the south <br />mine fan. The culvert discharges to an unnamed ephemeral tributary of <br />Mineral Creek. Culvert location and alignment are shown on the South <br />Mine Fan Installation Map, (Map 30). <br />Design Calculations <br />Peak Discharge <br />!0-year, 24-hour event: 4.63 cfs <br />Required Size: 18-inch CMP <br />(from Figure 1, U.S. Bureau of Public Roads Nomograph, using <br />HW/D = 1.0) <br />• <br /> <br />Actual Size: 18-inch CMP <br />~~m~ <br />m:~m ~~ <br />166 Ra Revised - June 1992 <br />