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Home My WebLink AboutSW4210801_Design Calculations_20210811CSOESIGN & ENGINEERING, PLLC CLIENT -FOCUSED • COMPREHENSIVE • COST-EFFECTIVE 2537E. LYON STATION RD, STE 102 PO BOX 361 CREEDMOOR, NC 27522 919 230-0996 DITCH/DIVERSION SCHEDULE Diversion / Ditch Schedule Name Q10 c s V70 s Sies opes X.•1 Slope (%) Dept Flow Dept Shear Stress s Lining DWD-1/PD-1 3.00 3.31 3 1.85% 1.50 0.55 0.63 NAG-SC150 DWD-21PD-2 0.85 2.32 3 1.66% 1.50 0.35 0.36 NAG-SC150 DWD-31PD-3 2.41 3.20 3 1.96% 1.50 0.50 0.61 NAG-SC150 DWD-41PD-4 0.86 2.42 3 1.85% 1.50 0.34 0.40 NAG-SC150 CWD-1 11.07 3.86 3 1.17% 1.50 0.98 0.71 NAG-SC150 CWD-2 8.53 4.23 3 1.77% 1.50 0.82 0.91 NAG-SC150 DESIGN (& 2537 E. Lyon Station Road Suite 102, PO Box0361 FIRM LICA ENGINEERING, PLLC Creedmoor, NC 27522 P-1764 919-230-0996 Project NO: 20-085 Calculated/ Joel H. Sain, EIT Project Name: Holt Farms Prepared by: 4601 Mt. Hermon Rock Creek Project Location: Checked by: Chad E. Abbott, PE Road, Snow Camp, NC 27349 Diversion / Ditch Schedule Calculations Diversion / ditch name: DWD-1/PD-1 Impervious coefficient number (Cl) 0.95 Impervious area 13,822 sf 0.32 ac Pervious coefficient number (C2) 0.20 Pervious area 25,670 sf 0.59 ac Diversion / ditch coefficient number (CJ 0.46 Intensity (1) 7.15 in/hr Peak flow (Q10); Q = C x I x A = 1.49 / n x AW x R2/3 x S0.5 3.00 cfs Start elevation 657.00 ft sf Ift Ift ft Stop elevation 640.00 Length 921 Slope (S) 1.85% Sideslopes (X:1) 3 n-value 0.025 Wet area (AW) 0.91 Wet parameter (W) 3.48 ft Hydrulic radius (R) 0.26 Total Depth 1.50 ft Depth of flow 0.55 Shear stress 0.63 Ibs/sf Free board 0.95 Velocity (V10) 3.31 ft/s Lining: I NAG-SC150 Diversion / ditch name: I DWD-2/PD-2 Impervious coefficient number (Cl) 0.95 Impervious area 2,989 sf 0.07 ac Pervious coefficient number (C2) 0.20 Pervious area 11,781 sf 0.27 ac Diversion / ditch coefficient number (CJ 0.35 Intensity (1) 7.15 in/hr Peak flow (Q10); Q = C x I x A = 1.49 / n x AW x R2/3 x S0.5 0.85 cfs Start elevation 641.00 ft sf ft ft ft Stop elevation 638.00 Length 181 Slope (S) 1.66% Sideslopes (X:1) 3 n-value 0.025 Wet area (AW) 0.37 Wet parameter (Wp) 2.21 ft Hydrulic radius (R) 0.17 Total Depth 1.50 ft Depth of flow 0.35 Shear stress 0.36 Ibs/sf Free board 1.15 Velocity (V10) 2.32 ft/s Lining: I NAG-SC150 2537 E. Lyon Station Road DESIGN & Suite 102, PO Box 0361 FIRM LICA ENGINEERING, RLLC Creedmoor, NC 27522 P-1764 919-230-0996 Project NO: 20-085 Calculated/ Joel H. Sain, EIT Project Name: Holt Farms Prepared by: 4601 Mt. Hermon Rock Creek Project Location: Checked by: Chad E. Abbott, PE Road, Snow Camp, INC 27349 Diversion / Ditch Schedule Calculations Diversion / ditch name: DWD-3/PD-3 Impervious coefficient number (Cl) 0.95 Impervious area 10,909 sf 0.25 ac Pervious coefficient number (C2) 0.20 Pervious area 21,443 sf 0.49 ac Diversion / ditch coefficient number (CJ 0.45 Intensity (1) 7.15 in/hr Peak flow (Q10); Q = C x I x A = 1.49 / n x AW x R2/3 x S0.5 2.41 cfs Start elevation 657.00 ft sf Ift Ift 1 ft Stop elevation 637.00 Length 1023 Slope (S) 1.96% Sideslopes (X:1) 3 n-value 0.025 Wet area (AW) 0.75 Wet parameter (W) 3.17 ft Hydrulic radius (R) 0.24 Total Depth 1.50 ft Depth of flow 0.50 Shear stress 0.61 Ibs/sf Free board 1.00 Velocity (V10) 3.20 ft/s Lining: I NAG-SC150 Diversion / ditch name: I DWD-4/PD-4 Impervious coefficient number (Cl) 0.95 Impervious area 3,016 sf 0.07 ac Pervious coefficient number (C2) 0.20 Pervious area 11,781 sf 0.27 ac Diversion / ditch coefficient number (CJ 0.35 Intensity (1) 7.15 in/hr Peak flow (Q10); Q = C x I x A = 1.49 / n x AW x R2/3 x S0.5 0.86 cfs Start elevation 657.00 ft sf ft ft ft Stop elevation 640.00 Length 921 Slope (S) 1.85% Sideslopes (X:1) 3 n-value 0.025 Wet area (AW) 0.35 Wet parameter (Wp) 2.17 ft Hydrulic radius (R) 0.16 Total Depth 1.50 ft Depth of flow 0.34 Shear stress 0.40 Ibs/sf Free board 1.16 Velocity (V10) 2.42 ft/s Lining: I NAG-SC150 2537 E. Lyon Station Road DESIGN & Suite 102, PO Box 0361 FIRM LICA ENGINEERING, RLLC Creedmoor, NC 27522 P-1764 919-230-0996 Project NO: 20-085 Calculated/ Joel H. Sain, EIT Project Name: Holt Farms Prepared by: 4601 Mt. Hermon Rock Creek Project Location: Checked by: Chad E. Abbott, PE Road, Snow Camp, INC 27349 Diversion / Ditch Schedule Calculations Diversion / ditch name: CWD-1 Impervious coefficient number (Cl) 0.95 Impervious area 0 sf 0.00 ac Pervious coefficient number (C2) 0.20 Pervious area 337,130 sf 7.74 ac Diversion / ditch coefficient number (CJ 0.20 Intensity (1) 7.15 in/hr Peak flow (Q10); Q = C x I x A = 1.49 / n x AW x R2/3 x S0.5 11.07 cfs Start elevation 656.00 ft sf Ift Ift ft Stop elevation 643.00 Length 1115 Slope (S) 1.17% Sideslopes (X:1) 3 n-value 0.025 Wet area (AW) 2.87 Wet parameter (W) 6.19 ft Hydrulic radius (R) 0.46 Total Depth 1.50 ft Depth of flow 0.98 Shear stress 0.71 Ibs/sf Free board 0.52 Velocity (V10) 3.86 ft/s Lining: T NAG-SC150 Diversion / ditch name: I CWD-2 Impervious coefficient number (Cl) 0.95 Impervious area 0 sf 0.00 ac Pervious coefficient number (C2) 0.20 Pervious area 259,850 sf 5.97 ac Diversion / ditch coefficient number (CJ 0.20 Intensity (1) 7.15 in/hr Peak flow (Q10); Q = C x I x A = 1.49 / n x AW x R2/3 x S0.5 8.53 cfs Start elevation 657.00 ft sf ft ft ft Stop elevation 641.00 Length 904 Slope (S) 1.77% Sideslopes (X:1) 3 n-value 0.025 Wet area (AW) 2.02 Wet parameter (Wp) 5.19 ft Hydrulic radius (R) 0.39 Total Depth 1.50 ft Depth of flow 0.82 Shear stress 0.91 Ibs/sf Free board 0.68 Velocity (V10) 4.23 ft/s Lining: I NAG-SC150