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<br />SI~ EAST MINE DIVERSION <br />• ~~ <br />Peak Flow Calculation <br />1. Determine drainage area. <br />A = 32-28 acres <br />2. Determine curve number. <br />Cr189 <br />3. Determine precipitation. <br />l0yr -- 24hr = 1.6in <br />• 4. Determine volume of runoff. <br />l0yr -- 24hr = 0.71in <br />5. Determine peak flow <br />10yr -- 24hr = 32.0 cfs <br />EAST r1IrIE DIVERSION - EASTERN LINE <br />Ditch Sizing <br />1. Q = 16.0 cfs ( z of 32 cfs) <br />..t r~.._... ...._ <br />r <br />2. Cross section -shot June 11, 1981 <br />• Xl Xp Q = 63.43° <br />`~Y ~ = 74.48° <br />Y Xl 5' <br />(x X2= 9' <br />I <br />