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CONVEYANCE SYSTEM DESIGN <br /> Project Name: RITEAID#5231 By: P.A.D. <br /> Project Number: 08028 Date: 10/23/08 <br /> DRAINAGE CRITERIA: CITY OF EVERETT <br /> RAINFALL METHOD: Rational Method <br /> DESIGN STORM: 25YR/24HR <br /> P(in)= 2.6 aR= 2.66 bR= 0.65 iR=aR*Tc"(-bR)and I=P*IR <br /> FROM TO A C CA CAtot Tc I Q DIA n s Qf Vf Q/Qf <br /> SDCO9 CB3 0.40 0.90 0.36 0.36 6.3 2.1 0.75 8 0.012 0.1000 4.19 11.9 0.18 <br /> CB8 CB7 0.25 0.70 0.18 0.18 6.3 2.1 0.37 8 0.012 0.0065 1.07 3.0 0.34 <br /> CB7 CB6 0.04 0.90 0.04 0.21 6.3 2.1 0.44 12 0.012 0.0136 4.56 5.8 0.10 <br /> CB13 CB12 0.22 0.70 0.15 0.15 6.3 2.1 0.32 8 0.012 0.0065 1.07 3.0 0.30 <br /> CB17 CB16 0.42 0.65 0.27 0.27 6.3 2.1 0.57 8 0.012 0.0065 1.07 3.0 0.53 <br /> CB16 CB15 0.06 0.70 0.04 0.32 6.3 2.1 0.66 8 0.012 0.0065 1.07 3.0 0.62 <br /> CB15 CB14 0.00 0.90 0.00 0.32 6.3 2.1 0.66 8 0.012 0.0065 1.07 3.0 0.62 <br /> CB14 CB12 0.33 0.75 0.25 0.56 6.3 2.1 1.18 10 _ 0.012 0.0060 1.86 3.4 0.63 <br /> CB12 CB11 0.09 0.90 0.08 0.80 6.3 2.1 1.67 10 0.012 0.0060 1.86 3.4 0.90 <br /> CB11 CB10 0.05 0.90 0.05 0.84 6.3 2.1 1.76 10 0.012 0.0070 2.01 3.7 0.88 <br /> CB10 CB6 0.04 0.90 0.04 0.88 6.3 2.1 1.84 10 0.012 0.0070 2.01 3.7 0.91 <br /> CB6 CB3 WATER QUALITY FLOW 0.21 8 0.012 0.0100 1.33 3.8 0.16 <br /> CB7 CB3 WATER QUALITY BYPASS 2.28 12 0.012 0.2915 21.09 26.6 0.11 <br /> • <br /> CB3 CB1 0.00 0.85 0.00 0.00 6.3 2.1 3.03 12 0.012 0.0244 6.10 7.7 0.50 <br /> PIPE DIA. (FT) = 12 <br /> SLOPE (FT/FT)= 0.005 Q/Qf< 1.0, <ok> <br /> N = 0.012 <br /> Q = 1.49 X A X RA2/3 X SA1/2/N = 2.76 CFS <br /> �' 08028-STMCLC.xls,CONVEY <br /> r <br />