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6226 Cc ce Calcs <br /> BARGHAUSEN CONSULTING ENGINEERS-PIPE FLOW CALCULATOR <br /> using the Rational Method&Manning Formula <br /> Type IA SCS rainfall event 25 YEAR STORM <br /> JOB NAME: COSTCO FUEL FACILITY EXPANSION (NOTE:ENTER DEFAULTS AND STORM DATA BEFORE BEGINNING Tc CALC <br /> JOB#: 6226 DEFAULTS C= 0.66 n= 0.009 L FPS INTIAL Tt <br /> Date: 8/10/2018 d= 12 Tc= 6.3 260 2 10 12.167 <br /> A=Contributing Area(Ac) Qd=Design Flow(cfs) COEFFICIENTS FOR THE RATIONAL METHOD"Ir"-EQUATION <br /> C=Runoff Coefficient Qf=Full Capacity Flow(cfs) STOR Ar Br <br /> Tc=Time of Concentration(min) Vd=Velocity at Design Flow(fps) 2YR <br /> I=Intensity at Tc(in/hr) Vf=Velocity at Full Flow(fps) 10YR PRECIP: 2.77 <br /> d=Diameter of Pipe(in) s=Slope of pipe(%) 25YR Ar= 2.61 <br /> L=Length of Pipe(ft) n=Manning Roughness Coefficient 50YR Br= 0.63 <br /> D=Water Depth at Qd(in) Tt=Travel Time at Vd(min) 100YR <br /> FROM TO A s L d Tc n C SUM A A*C SUM A*C I Qd Qf Qd/Qf D/d D Vf Vd Tt <br /> EXCB#2 EXCB#3 0.19 0.37 46 8 6.3 0.009 0.89 0.186 0.17 0.17 2.27 0.38 1.06 0.354 0.411 3.29 3.04 2.79 0.28 <br /> EXCB#3 SDCB#1 0.20 0.32 112 12 6.6 0.009 0.91 0.384 0.18 0.35 2.21 0.76 2.91 0.262 0.350 4.20 3.71 3.12 0.60 <br /> SDCB#1 SDCB#2 0.00 0.22 27 12 7.2 0.009 0.95 0.384 0.00 0.35 2.09 0.72 2.41 0.299 0.374 4.49 3.07 2.68 0.17 <br /> SDCB#2 SDCB#3 0.26 0.24 74 12 7.3 0.009 0.92 0.646 0.24 0.59 2.06 1.21 2.52 0.479 0.488 5.86 3.21 3.20 0.39 <br /> SDCB#3 EXCB#1 0.18 0.26 62 12 7.7 0.009 0.95 0.825 0.17 0.76 1.99 1.51 2.62 0.575 0.543 6.52 3.34 3.45 0.30 <br /> Page 1 <br />