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Standard Form SF -2 — Rational Method Procedure — Storm Drainage System Design <br />Canyon Dolomite - Old Quarry <br />Calculated by John Jankousky Revision: 5292015 <br />DESIGN STORM: 100 -YR <br />DIRECT RUNOFF <br />TOTAL RUNOFF SWALE JPIPE <br />TRAVEL TIME <br />U <br />a m m <br />rn rn <br />n o doE <br />W,C) <br />2 a c <br />v v <br />Q y c ? 2 <br />,� U m <br />S 0 a m m <br />a <br />rn v <br />o m <br />r REMARKS <br />ul <br />a <br />1 2 3 4 5 6 <br />7 8 9 10 11 12 13 14 15 <br />16 17 <br />18 19 20 21 22 <br />Quarry -outlet Quarry -outlet 33.70 0.52 16.2 <br />17.6 5.60 9870 <br />FORMULA: Q = C i A (Q is flow in cfs, Cis runoff coefficient [dim'less], i is rainfall intensity in inches/hr (based on t ;), A is area in acres, <br />Velocity in pipe estimated by V = (1.49/0.013) x ((Diameter(mches)/(12'4))^0.667) x ((Slope(%)/100)10.5); Travel time, T, = <br />Length (ft)/ Velocity (fps) /(60 seclmm) <br />Velocity in street flow or swale flow estimated from Figure <br />RO1, Travel time, T, -Length (ft) / Velocity (fps) /(60 sectmin) <br />Page A-10 hydrology—Canyon-Dolomite-RevO-May2015. x1sx Rational-100YR <br />