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HomeMy WebLinkAbout217 Sutton Lake Engineering Stormwater Calcs1 2 Watershed Model Schematic Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Project: Z:\T-Drive (Projects)\Library\2025\C48101.00 - Benton Construction Services - Sutton Lake Road - Stormwater Management Plan\Calculations\2025-TBD-TBD Benton Contruction Services JEB\MODEL\C48101.00 .gpwThursday, 10 / 2 / 2025 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 1 PRE Hydrograph type = SCS Runoff Peak discharge = 18.37 cfs Storm frequency = 1 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 37,363 cuft Drainage area = 5.020 ac Curve number = 84 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 3.79 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0 2 4 6 8 10 12 14 16 18 20 22 24 Q (cfs) 0.00 0.00 3.00 3.00 6.00 6.00 9.00 9.00 12.00 12.00 15.00 15.00 18.00 18.00 21.00 21.00 Q (cfs) Time (hrs) PRE Hyd. No. 1 -- 1 Year Hyd No. 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 2 POST Hydrograph type = SCS Runoff Peak discharge = 23.80 cfs Storm frequency = 1 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 51,520 cuft Drainage area = 5.020 ac Curve number = 93 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 3.79 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Q (cfs) 0.00 0.00 4.00 4.00 8.00 8.00 12.00 12.00 16.00 16.00 20.00 20.00 24.00 24.00 Q (cfs) Time (hrs) POST Hyd. No. 2 -- 1 Year Hyd No. 2 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 1 PRE Hydrograph type = SCS Runoff Peak discharge = 24.19 cfs Storm frequency = 2 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 49,658 cuft Drainage area = 5.020 ac Curve number = 84 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 4.60 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 Q (cfs) 0.00 0.00 4.00 4.00 8.00 8.00 12.00 12.00 16.00 16.00 20.00 20.00 24.00 24.00 28.00 28.00 Q (cfs) Time (hrs) PRE Hyd. No. 1 -- 2 Year Hyd No. 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 2 POST Hydrograph type = SCS Runoff Peak discharge = 29.59 cfs Storm frequency = 2 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 65,015 cuft Drainage area = 5.020 ac Curve number = 93 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 4.60 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Q (cfs) 0.00 0.00 5.00 5.00 10.00 10.00 15.00 15.00 20.00 20.00 25.00 25.00 30.00 30.00 Q (cfs) Time (hrs) POST Hyd. No. 2 -- 2 Year Hyd No. 2 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 1 PRE Hydrograph type = SCS Runoff Peak discharge = 42.58 cfs Storm frequency = 10 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 90,083 cuft Drainage area = 5.020 ac Curve number = 84 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 7.14 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Q (cfs) 0.00 0.00 10.00 10.00 20.00 20.00 30.00 30.00 40.00 40.00 50.00 50.00 Q (cfs) Time (hrs) PRE Hyd. No. 1 -- 10 Year Hyd No. 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 2 POST Hydrograph type = SCS Runoff Peak discharge = 47.51 cfs Storm frequency = 10 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 107,797 cuft Drainage area = 5.020 ac Curve number = 93 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 7.14 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Q (cfs) 0.00 0.00 10.00 10.00 20.00 20.00 30.00 30.00 40.00 40.00 50.00 50.00 Q (cfs) Time (hrs) POST Hyd. No. 2 -- 10 Year Hyd No. 2 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 1 PRE Hydrograph type = SCS Runoff Peak discharge = 55.78 cfs Storm frequency = 25 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 120,099 cuft Drainage area = 5.020 ac Curve number = 84 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 8.97 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Q (cfs) 0.00 0.00 10.00 10.00 20.00 20.00 30.00 30.00 40.00 40.00 50.00 50.00 60.00 60.00 Q (cfs) Time (hrs) PRE Hyd. No. 1 -- 25 Year Hyd No. 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 2 POST Hydrograph type = SCS Runoff Peak discharge = 60.29 cfs Storm frequency = 25 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 138,821 cuft Drainage area = 5.020 ac Curve number = 93 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 8.97 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Q (cfs) 0.00 0.00 10.00 10.00 20.00 20.00 30.00 30.00 40.00 40.00 50.00 50.00 60.00 60.00 70.00 70.00 Q (cfs) Time (hrs) POST Hyd. No. 2 -- 25 Year Hyd No. 2 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 1 PRE Hydrograph type = SCS Runoff Peak discharge = 80.98 cfs Storm frequency = 100 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 178,917 cuft Drainage area = 5.020 ac Curve number = 84 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 12.50 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Q (cfs) 0.00 0.00 10.00 10.00 20.00 20.00 30.00 30.00 40.00 40.00 50.00 50.00 60.00 60.00 70.00 70.00 80.00 80.00 90.00 90.00 Q (cfs) Time (hrs) PRE Hyd. No. 1 -- 100 Year Hyd No. 1 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Hyd. No. 2 POST Hydrograph type = SCS Runoff Peak discharge = 84.79 cfs Storm frequency = 100 yrs Time to peak = 11.93 hrs Time interval = 2 min Hyd. volume = 198,854 cuft Drainage area = 5.020 ac Curve number = 93 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 12.50 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Q (cfs) 0.00 0.00 10.00 10.00 20.00 20.00 30.00 30.00 40.00 40.00 50.00 50.00 60.00 60.00 70.00 70.00 80.00 80.00 90.00 90.00 Q (cfs) Time (hrs) POST Hyd. No. 2 -- 100 Year Hyd No. 2 Hydraflow Rainfall Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2024 Thursday, 10 / 2 / 2025 Return Intensity-Duration-Frequency Equation Coefficients (FHA) Period (Yrs) B D E (N/A) 1 0.0000 0.0000 0.0000 -------- 2 32.1696 3.0000 0.7097 -------- 3 0.0000 0.0000 0.0000 -------- 5 32.2927 2.5000 0.6552 -------- 10 34.7878 2.5000 0.6406 -------- 25 39.6948 2.9000 0.6309 -------- 50 43.6758 3.1000 0.6269 -------- 100 47.0517 3.3000 0.6197 -------- File name: Rational.IDF Intensity = B / (Tc + D)^E Return Intensity Values (in/hr) Period (Yrs) 5 min 10 15 20 25 30 35 40 45 50 55 60 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2 7.35 5.21 4.14 3.48 3.02 2.69 2.43 2.23 2.06 1.92 1.80 1.70 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5 8.63 6.17 4.95 4.20 3.68 3.30 3.00 2.77 2.57 2.41 2.27 2.15 10 9.57 6.90 5.56 4.73 4.16 3.74 3.41 3.15 2.93 2.75 2.59 2.46 25 10.77 7.91 6.43 5.51 4.86 4.38 4.01 3.70 3.46 3.25 3.07 2.91 50 11.77 8.71 7.11 6.10 5.40 4.87 4.46 4.13 3.85 3.62 3.42 3.25 100 12.68 9.47 7.77 6.69 5.93 5.36 4.91 4.56 4.26 4.00 3.79 3.60 Tc = time in minutes. Values may exceed 60. Rainfall Precipitation Table (in) Precip. file name: E:\MacConnell Projects WFH\2025-TBD-TBD Benton Contruction Services JEB\MAPS\SCS.pcp Storm Distribution 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr SCS 24-hour 3.79 4.60 0.00 3.30 7.14 8.97 6.80 12.50 SCS 6-Hr 2.77 3.37 0.00 0.00 5.14 6.37 0.00 8.66 Huff-1st 0.00 1.55 0.00 2.75 4.00 5.38 6.50 8.00 Huff-2nd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-3rd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-4th 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Huff-Indy 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Custom 0.00 1.75 0.00 2.80 3.90 5.25 6.00 7.10