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HomeMy WebLinkAboutWPO201500047 Calculations 2020-11-18SHIMP ENGINEERING, P.C. Design Focused Engineering November 181h, 2020 Mr. Frank V. Pohl APPROVED County Engineer by the Albemarle County Community Development Department Albemarle County Date 08/26/21 Department of Community Development File wP0201500047 RE: The Pants Project "Darken Pond" — As -Built Certification Letter Dear Mr. Pohl, I have performed the necessary surveys and inspections on the stormwater Wet Pond at "The Pants Project", TMP 57-87, 57-90, 58-17 & 58-18. I can confirm that the proposed wet pond has been constructed in a manner that meets the overall goal of the SWM Plan for this project. The pond was constructed at an overall lower elevation than proposed. The total depth and storage of the pond is greater than what was proposed. An as -built analysis of the pond has determined that the conditions will release stormwater from the 1-yr and 10-yr storms at flows below those proposed and therefore below the energy balance equation requirements. The variations in construction from the approved plans are summarized below. • Top of Dam constructed 2.23-ft below proposed elevation • Bottom of pond constructed 4.54-ft below proposed elevation • Total depth of pond constructed to 11.31-ft rather than the 9-ft proposed depth • Emergency Spillway constructed with a depth 1.41-ft below the top of dam instead of 1-ft • Top of standpipe constructed 3.25-ft below top of dam instead of 2-ft below • 7x12" rectangular orifice constructed on standpipe instead of 8" round orifice. If you have any questions or concerns please feel free to contact us at 434-227-5140 or you can email me at justin@shimp-engineering.com. Regards, G 45183 Justin Shimp, P.E. SIpNAL �yG1rr Shimp Engineering, P.C. '���•+ 912 E. High Sr. Charlottesville, VA 22902 1434.227 5140 1 shtmp-engmeenng com O 5P D.A.5 t Pond D.A.2 / 1 3 P FOREBAY#1 O D.A.3 (9) (8) D.A.9 D.A.8 C7) O D.A.7 D.A.6 4P Q\ OREBAY#2 O D.A.4 POND DA Subcat Reach Aon Link Proposed Pants Project Culvert Post -Development Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 33.215 55 Woods, Good, HSG B (1, 2, 3, 4, 5, 5A, 6, 7, 8, 9, 10, 11) 2.229 61 >75%Grass cover, Good, HSG B (1, 2, 3, 4, 5, 5A, 6, 7, 8, 9, 10, 11, 12) 0.949 85 Gravel roads, HSG B (1, 2, 3, 4, 5, 5A, 6, 7, 8, 9, 10, 11, 12) 36.394 TOTAL AREA Proposed Pants Project Culvert Post -Development Type 1124-hr 1yr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 3 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>0.29" Tc=9.6 min CN=58 Runoff=0.07 cfs 0.007 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious RunoffDepth>0.20" Tc=18.0 min CN=55 Runoff=0.14 cfs 0.031 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>0.20" Tc=15.3 min CN=55 Runoff=0.42 cfs 0.087 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>0.23" Tc=18.2 min CN=56 Runoff=2.41 cfs 0.464 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious Runoff Depth>0.23" Tc=15.7 min CN=56 Runoff=0.09 cfs 0.016 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious RunoffDepth>0.29" Tc=5.0 min CN=58 Runoff=0.40 cfs 0.029 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>0.26" Tc=13.7 min CN=57 Runoff=0.15 cfs 0.020 of Subcatchment7:D.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>0.28" Tc=13.1 min CN=58 Runoff=0.07 cfs 0.008 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>0.48" Tc=9.3 min CN=64 Runoff=0.06 cfs 0.004 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>0.45" Tc=12.2 min CN=63 Runoff=0.16 cfs 0.013 of Subcatchmentl0:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>0.38" Tc=8.0 min CN=61 Runoff=0.09 cfs 0.006 of Subcatchment1l:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>0.52" Tc=5.1 min CN=65 Runoff--O. 11 cfs 0.005 of Subcatchment12:D.A.12 Runoff Area=28,264sf 0.00%Impervious RunoffDepth>0.78" Tc=10.3 min CN=71 Runoff=0.73 cfs 0.042 of Pond 3P: FOREBAY#1 Peak Elev=681.13' Storage=552 cf Inflow=0.42 cfs 0.087 of 24.0" Round Culvert n=0.013 L=40.6' 5=0.0197'P Ou flow=0.22 cfs 0.076 of Pond 4P: FOREBAY#2 Peak Elev=681.68' Storage=901 cf Inflow=2.41 cfs 0.464 of 36.0" Round Culvert n=0.011 L=40.0' 5=0.0368'P Outflow=2.36 cfs 0.447 of Pond 5P: Level 2 Wet Pond Peak Elev=682.42' Storage=9,860 cf Inflow=2.67 cfs 0.600 of Outflow=0.52 cfs 0.412 of Proposed Pants Project Culvert Post -Development Type/1 24-hr 1 yr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 4 Total Runoff Area = 36.394 ac Runoff Volume = 0.733 of Average Runoff Depth = 0.24" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac Proposed Pants Project Culvert Post -Development Type 1124-hr 1yr Rainfa11=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 1: D.AA Runoff = 0.07 cfs @ 12.06 hrs, Volume= 0.007 at Depth> 0.29" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 0.14 cfs @ 12.22 hm Volume= 0.031 at Depth> 0.20" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 0.42 cfs @ 12.16 hrs, Volume= 0.087 at Depth> 0.20" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 1yr Rainfall=3.04" Proposed Pants Project Culvert Post -Development Type 1124-hr 1yr Rainfa11=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 6 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 2.41 cfs @ 12.20 hrs, Volume= 0.464 at Depth> 0.23" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 0.09 cfs @ 12.16 hrs, Volume= 0.016 at Depth> 0.23" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, Proposed Pants Project Culvert Post -Development Type 1124-hr 1yr Rainfa11=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 5A: POND DA Runoff = 0.40 cfs @ 12.00 hrs, Volume= 0.029 at Depth> 0.29" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 0.15 cfs @ 12.12 hm Volume= 0.020 at Depth> 0.26" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 0.07 cfs @ 12.10 hm Volume= 0.008 at Depth> 0.28" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 1yr Rainfall=3.04" Proposed Pants Project Culvert Post -Development Type 1124-hr 1yr Rainfa11=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 8 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.06 cfs @ 12.03 hrs, Volume= 0.004 at Depth> 0.48" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 0.16 cfs @ 12.07 hrs, Volume= 0.013 at Depth> 0.45" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, Proposed Pants Project Culvert Post -Development Type 1124-hr 1yr Rainfa11=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 10: D.A.10 Runoff = 0.09 cfs @ 12.02 hrs, Volume= 0.006 at Depth> 0.38" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 0.11 cfs @ 11.98 hrs, Volume= 0.005 at Depth> 0.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 0.73 cfs @ 12.03 hrs, Volume= 0.042 at Depth> 0.78" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1yr Rainfall=3.04" 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area Proposed Pants Project Culvert Post -Development Type 1124-hr 1 yr Rainfa11=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 10 Tc Length Slope Velocity Capacity Description 10.3 Direct Entry, Summary for Pond 3P: FOREBAY#1 Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 0.20" for 1yr event Inflow = 0.42 cfs@ 12.16 hrs Volume= 0.087 of Outflow = 0.22 cfs @ 12.62 hrs, Volume= 0.076 af, Atten= 47% Lag= 27.2 min Primary = 0.22 cfs @ 12.62 hrs Volume= 0.076 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 681.13'@ 12.62 hrs Surf.Area= 562 sf Storage= 552 cf Plug -Flow detention time=95.9 min calculated for 0.076 of (87%of inflow) Center -of -Mass det. time=38.5 min (1,011.1 - 972.6 ) Volume Invert Avail.Storage Storage Description #1 678.45' 3,447 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.45 20 0 0 680.00 163 142 142 682.00 868 1,031 1,173 684.00 1,406 2,274 3,447 Device Routing Invert Outlet Devices #1 Primary 680.95' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 680.95' / 680.15' S= 0.0197 ? Cc= 0.900 n= 0.013 Primary OutFlow Max=0.22 cfs@ 12.62 hrs HW=681.13' (Free Discharge) L1=Culvert (Inlet Controls 0.22 cfs @ 1.55 fps) Summary for Pond 4P: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious Inflow Depth > 0.23" for 1yr event Inflow = 2.41 cfs @ 12.20 hrs Volume= 0.464 of Outflow = 2.36 cfs @ 12.23 hrs, Volume= 0.447 af, Atten= 2% Lag= 1.9 min Primary = 2.36 cfs @ 12.23 hrs Volume= 0.447 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 681.68'@ 12.23 hrs Surf.Area= 660 sf Storage= 901 cf Plug -Flow detention time=26.6 min calculated for 0.447 of (96%of inflow) Center -of -Mass det. time=9.9 min ( 974.5 - 964.6 ) Proposed Pants Project Culvert Post -Development Type 1124-hr 1yr Rainfa11=3.O4" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 11 Volume Invert Avail.Storage Storage Description #1 678.60' 7,652 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-fit) (cubic -feet) (cubic -feet) 678.60 20 0 0 680.00 164 129 129 682.00 753 917 1,046 684.00 1,472 2,225 3,271 686.00 2,909 4,381 7,652 Device Routing Invert Outlet Devices #1 Primary 681.12' 36.0" Round Culvert L= 40.0' CPP, end -section conforming to fill, Ke= 0.500 Inlet/Outlet Invert= 681.12'/ 679.65' S=0.0368? Cc=0.900 n=0.011 Primary OutFlow Max=2.35 cis@ 12.23 hrs HW=681.68' (Free Discharge) L1=Culvert (Inlet Controls 2.35 cis @ 2.56 fps) Summary for Pond 5P: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious, Inflow Depth > 0.22" for lyr event Inflow = 2.67 cfs @ 12.23 hrs, Volume= 0.600 of Outflow = 0.52 cfs @ 16.95 hrs, Volume= 0.412 at,, Atten= 81% Lag= 283.5 min Primary = 0.52 cfs @ 16.95 hrs, Volume= 0.412 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 682.42'@ 16.95 hrs Surf.Area= 24,189 sf Storage= 9,860 cf Plug -Flow detention time=251.2 min calculated for 0.411 of (69% of inflow) Center -of -Mass det. time=128.8 min (1,106.0 - 977.1) Volume Invert Avail.Storage Storage Description #1 682.00' 84,955 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 682.00 22,442 0 0 684.00 30,705 53,147 53,147 685.00 32,911 31,808 84,955 Device Routing Invert Outlet Devices #1 Primary 676.00' 30.0" Round Culvert L= 73.9' Ke= 0.400 Inlet / Outlet Invert= 676.00' / 674.00' S= 0.0271 ? Cc= 0.900 n= 0.013 #2 Device 1 682.00' 8.0" Vert. OrificelGrate C= 0.600 #3 Device 1 683.00' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 684.00' 20.0' long x 20.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Proposed Pants Project Culvert Post -Development Type // 24-hr 1 yr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 12 Primary OutFlow Max=0.52 cfs@ 16.95 hrs HW=682.42' (Free Discharge) 1=Culvert (Passes 0.52 cfs of 57.60 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.52 cfs @ 2.21 fps) 3=Riser ( Controls 0.00 cfs) =Broad•Crested Rectangular Weir ( Controls 0.00 cfs) Proposed Pants Project Culvert Post -Development Type // 24-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 13 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>0.52" Tc=9.6 min CN=58 Runoff=0.18 cfs 0.013 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious RunoffDepth>0.40" Tc=18.0 min CN=55 Runoff=0.50 cfs 0.062 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>0.41" Tc=15.3 min CN=55 Runoff=1.56 cfs 0.174 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>0.44" Tc=18.2 min CN=56 Runoff=7.68 cfs 0.896 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious Runoff Depth>0.44" Tc=15.7 min CN=56 Runoff=0.30 cfs 0.032 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious Runoff Depth>0.52" Tc=5.0 min CN=58 Runoff=0.97 cfs 0.053 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>0.48" Tc=13.7 min CN=57 Runoff=0.42 cfs 0.038 of Subcatchment7:D.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>0.52" Tc=13.1 min CN=58 Runoff=0.17 cfs 0.014 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>0.80" Tc=9.3 min CN=64 Runoff--O. 11 cfs 0.006 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>0.75" Tc=12.2 min CN=63 Runoff=0.31 cfs 0.021 of Subcatchmentl0:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>0.65" Tc=8.0 min CN=61 Runoff=0.19 cfs 0.011 of Subcatchment1l:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>0.85" Tc=5.1 min CN=65 Runoff--O. 19 cfs 0.009 of Subcatchment12:D.A.12 Runoff Area=28,264sf 0.00%Impervious Runoff Depth>1.18" Tc=10.3 min CN=71 Runoff=1.14 cfs 0.064 of Pond 3P: FOREBAY#1 Peak EIev=681.40' Storage=715 cf Inflow=1.56 cfs 0.174 of 24.0" Round Culvert n=0.013 L=40.6' 5=0.0197'P Outflow=1.29 cfs 0.162 of Pond 4P: FOREBAY#2 Peak EIev=682.16' Storage=1,223 cf Inflow=7.68 cfs 0.896 of 36.0" Round Culvert n=0.011 L=40.0' 5=0.0368'P Outflow=7.55 cfs 0.879 of Pond 5P: Level 2 Wet Pond Peak EIev=682.79' Storage=19,013 cf Inflow=9.77 cfs 1.189 of Outflow=1.14 cfs 0.922 of Proposed Pants Project Culvert Post -Development Type/1 24-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 14 Total Runoff Area = 36.394 ac Runoff Volume =1.393 of Average Runoff Depth = 0.46" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac Proposed Pants Project Culvert Post -Development Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment 1: D.A.1 Runoff = 0.18 cfs @ 12.04 hrs, Volume= 0.013 at Depth> 0.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 0.50 cfs @ 12.16 hrs, Volume= 0.062 at Depth> 0.40" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 1.56 cfs @ 12.12 hrs, Volume= 0.174 af, Depth> 0.41" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 2yr Rainfall=3.68" Proposed Pants Project Culvert Post -Development Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 16 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 7.68 cfs @ 12.16 hrs, Volume= 0.896 at Depth> 0.44" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 0.30 cfs @ 12.12 hrs, Volume= 0.032 at Depth> 0.44" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 1124-hr 2yr Rainfall=3.68" Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, Proposed Pants Project Culvert Post -Development Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 17 Summary for Subcatchment 5A: POND DA Runoff = 0.97 cfs @ 11.98 hrs, Volume= 0.053 at Depth> 0.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 0.42 cfs @ 12.10 hrs, Volume= 0.038 at Depth> 0.48" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 0.17 cfs @ 12.08 hrs, Volume= 0.014 at Depth> 0.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 2yr Rainfall=3.68" Proposed Pants Project Culvert Post -Development Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 18 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.11 cfs @ 12.02 hrs, Volume= 0.006 at Depth> 0.80" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 0.31 cfs@ 12.06 hrs, Volume= 0.021 at Depth> 0.75" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 1124-hr 2yr Rainfall=3.68" Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, Proposed Pants Project Culvert Post -Development Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 19 Summary for Subcatchment 10: D.A.10 Runoff = 0.19 cfs@ 12.01 hrs, Volume= 0.011 at Depth> 0.65" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 0.19 cfs @ 11.97 hm Volume= 0.009 at Depth> 0.85" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 1.14 cfs @ 12.03 hm Volume= 0.064 af, Depth> 1.18" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area Proposed Pants Project Culvert Post -Development Type H 24-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 20 Tc Length Description 10.3 Direct Entry, Summary for Pond 3P: FOREBAM Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 0.41" for 2yr event Inflow = 1.56 cfs @ 12.12 hrs, Volume= 0.174 of Outflow = 1.29 cfs @ 12.20 hrs, Volume= 0.162 af, Atten=17%q Lag= 4.7 min Primary = 1.29 cfs @ 12.20 hrs, Volume= 0.162 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 681.40'@ 12.20 hrs Surf.Area= 656 sf Storage= 715 cf Plug -Flow detention time=50.1 min calculated for 0.162 of (93% of inflow) Center -of -Mass det. time=17.5 min ( 951.3 - 933.8 ) Volume Invert Avail.Storage Storage Description #1 678.45' 3,447 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.45 20 0 0 680.00 163 142 142 682.00 868 1,031 1,173 684.00 1,406 2,274 3,447 Device Routing Invert Outlet Devices #1 Primary 680.95' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 680.95' / 680.15' S= 0.0197 ? Cc= 0.900 n= 0.013 Primary OutFlow Max=1.29 cis@ 12.20 hrs HW=681.40' (Free Discharge) L1=Culvert (Inlet Controls 1.29 cfs @ 2.44 fps) Summary for Pond 41p: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious Inflow Depth > 0.44" for 2yr event Inflow = 7.68 cfs @ 12.16 hrs Volume= 0.896 of Outflow = 7.55 cfs @ 12.19 hrs Volume= 0.879 af, Atten= 2%n Lag= 1.6 min Primary = 7.55 cfs @ 12.19 hrs Volume= 0.879 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 682.16'@ 12.19 hrs Surf.Area= 810 sf Storage=1,223 cf Plug -Flow detention time=14.5 min calculated for 0.879 of (98%of inflow) Center -of -Mass det. time=4.9 min ( 934.2 - 929.3 ) Proposed Pants Project Culvert Post -Development Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 21 Volume Invert Avail.Storage Storage Description #1 678.60' 7,652 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-fit) (cubic -feet) (cubic -feet) 678.60 20 0 0 680.00 164 129 129 682.00 753 917 1,046 684.00 1,472 2,225 3,271 686.00 2,909 4,381 7,652 Device Routing Invert Outlet Devices #1 Primary 681.12' 36.0" Round Culvert L= 40.0' CPP, end -section conforming to fill, Ke= 0.500 Inlet/Outlet Invert= 681.12'/ 679.65' S=0.0368? Cc=0.900 n=0.011 Primary OutFlow Max=7.54 cis@ 12.19 hrs HW=682.16' (Free Discharge) L1=Culvert (Inlet Controls 7.54 cis @ 3.47 fps) Summary for Pond 5P: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious, Inflow Depth > 0.43" for 2yr event Inflow = 9.77 cfs @ 12.19 hrs, Volume= 1.189 of Outflow = 1.14 cfs @ 15.25 hrs, Volume= 0.922 af, Atten= 88% Lag=183.6 min Primary = 1.14 cfs @ 15.25 hrs, Volume= 0.922 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 682.79'@ 15.25 hrs Surf.Area= 25,705 sf Storage=19,013 cf Plug -Flow detention time=226.7 min calculated for 0.921 of (78% of inflow) Center -of -Mass det. time=131.4 min (1,066.7 - 935.3 ) Volume Invert Avail.Storage Storage Description #1 682.00' 84,955 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 682.00 22,442 0 0 684.00 30,705 53,147 53,147 685.00 32,911 31,808 84,955 Device Routing Invert Outlet Devices #1 Primary 676.00' 30.0" Round Culvert L= 73.9' Ke= 0.400 Inlet / Outlet Invert= 676.00' / 674.00' S= 0.0271 ? Cc= 0.900 n= 0.013 #2 Device 1 682.00' 8.0" Vert. OrificelGrate C= 0.600 #3 Device 1 683.00' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 684.00' 20.0' long x 20.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Proposed Pants Project Culvert Post -Development Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 22 Primary OutFlow Max=1.14 cis@ 15.25 hrs HW=682.79' (Free Discharge) Culvert (Passes 1.14 cis of 59.60 cfs potential flow) 2=Orifice/Grate (Orifice Controls 1.14 cfs @ 3.25 fps) 3=Riser ( Controls 0.00 cfs) =Broad -Crested Rectangular Weir ( Controls 0.00 cfs) Proposed Pants Project Culvert Post -Development Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 23 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>1.47" Tc=9.6 min CN=58 Runoff=0.64 cfs 0.036 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious RunoffDepth>1.25" Tc=18.0 min CN=55 Runoff=2.39 cfs 0.193 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>1.25" Tc=15.3 min CN=55 Runoff=7.35 cfs 0.539 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>1.32" Tc=18.2 min CN=56 Runoff=33.52 cfs 2.682 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious Runoff Depth>1.32" Tc=15.7 min CN=56 Runoff=1.29 cfs 0.095 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious Runoff Depth>1.47" Tc=5.0 min CN=58 Runoff=3.24 cfs 0.149 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>1.40" Tc=13.7 min CN=57 Runoff=1.65 cfs 0.110 of SubcatchmentTD.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>1.47" Tc=13.1 min CN=58 Runoff=0.63 cfs 0.041 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>1.94" Tc=9.3 min CN=64 Runoff=0.29 cfs 0.016 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>1.85" Tc=12.2 min CN=63 Runoff=0.87 cfs 0.052 of Subcatchmentl0:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>1.70" Tc=8.0 min CN=61 Runoff=0.55 cfs 0.028 of Subcatchment1l:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>2.02" Tc=5.1 min CN=65 Runoff=0.47 cfs 0.021 of Subcatchment12:D.A.12 Runoff Area=28,264sf 0.00%Impervious RunoffDepth>2.53" Tc=10.3 min CN=71 Runoff=2.51 cfs 0.137 of Pond 3P: FOREBAY#1 Peak EIev=682.09' Storage=1,251 cf Inflow=7.35 cfs 0.539 of 24.0" Round Culvert n=0.013 L=40.6' 5=0.0197'P Outflow=7.19 cfs 0.526 of Pond 4P: FOREBAY#2 Peak EIev=683.59' Storage=2,812 cf Inflow=33.52 cfs 2.682 of 36.0" Round Culvert n=0.011 L=40.0' 5=0.0368'P Outflow=33.27 cfs 2.664 of Pond 5P: Level 2 Wet Pond Peak EIev=683.58' Storage=40,686 cf Inflow=44.54 cfs 3.627 of Outflow=20.15 cfs 3.096 of Proposed Pants Project Culvert Post -Development Type II 24-hr 10yr Rainfall-5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 24 Total Runoff Area = 36.394 ac Runoff Volume = 4.097 of Average Runoff Depth =1.35" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac Proposed Pants Project Culvert Post -Development Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 25 Summary for Subcatchment 1: D.AA Runoff = 0.64 cfs @ 12.02 hrs, Volume= 0.036 at Depth> 1.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 2.39 cfs @ 12.13 hrs, Volume= 0.193 at Depth> 1.25" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 7.35 cfs @ 12.09 hrs, Volume= 0.539 at Depth> 1.25" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 10yr Rainfall=5.54" Proposed Pants Project Culvert Post -Development Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 26 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 33.52 cfs@ 12.13 hrs, Volume= 2.682 at Depth> 1.32" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 1.29 cfs @ 12.09 hrs, Volume= 0.095 at Depth> 1.32" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, Proposed Pants Project Culvert Post -Development Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 27 Summary for Subcatchment 5A: POND DA Runoff = 3.24 cfs @ 11.97 hm Volume= 0.149 at Depth> 1.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 1.65 cfs @ 12.07 hrs, Volume= 0.110 at Depth> 1.40" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 0.63 cfs @ 12.07 hrs, Volume= 0.041 at Depth> 1.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 10yr Rainfall=5.54" Proposed Pants Project Culvert Post -Development Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 28 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.29 cfs @ 12.02 hrs, Volume= 0.016 at Depth> 1.94" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/tt) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 0.87 cfs @ 12.05 hrs, Volume= 0.052 at Depth> 1.85" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, Proposed Pants Project Culvert Post -Development Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 29 Summary for Subcatchment 10: D.A.10 Runoff = 0.55 cfs @ 12.00 hrs, Volume= 0.028 at Depth> 1.70" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 0.47 cfs @ 11.97 hrs, Volume= 0.021 at Depth> 2.02" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 2.51 cfs @ 12.02 hrs, Volume= 0.137 at Depth> 2.53" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area Proposed Pants Project Culvert Post -Development Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 30 Tc Length Description 10.3 Direct Entry, Summary for Pond 3P: FOREBAY#1 Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 1.25" for 10yr event Inflow = 7.35 cfs @ 12.09 hrs, Volume= 0.539 of Outflow = 7.19 cfs @ 12.12 hrs, Volume= 0.526 af, Atten= 2% Lag=1.5 min Primary = 7.19 cfs @ 12.12 hrs, Volume= 0.526 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 682.09'@ 12.12 hrs Surf.Area= 892 sf Storage=1,251 cf Plug -Flow detention time=18.2 min calculated for 0.526 of (98% of inflow) Center -of -Mass det. time=5.8 min ( 891.6 - 885.8 ) Volume Invert Avail.Storage Storage Description #1 678.45' 3,447 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.45 20 0 0 680.00 163 142 142 682.00 868 1,031 1,173 684.00 1,406 2,274 3,447 Device Routing Invert Outlet Devices #1 Primary 680.95' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 680.95' / 680.15' S= 0.0197 ? Cc= 0.900 n= 0.013 Primary OutFlow Max=7.19 cis@ 12.12 hrs HW=682.09' (Free Discharge) L1=Culvert (Inlet Controls 7.19 cfs @ 3.89 fps) Summary for Pond 41p: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious Inflow Depth > 1.32" for 10yr event Inflow = 33.52 cfs@ 12.13 hm Volume= 2.682 of Outflow = 33.27 cfs@ 12.14 hm Volume= 2.664 af, Atten=1%q Lag= 1.1 min Primary = 33.27 cfs@ 12.14 hm Volume= 2.664 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 683.59'@ 12.14 hrs Surf.Area=1,324 sf Storage= 2,812 cf Plug -Flow detention time=5.7 min calculated for 2.663 of (99% of inflow) Center -of -Mass det. time=2.0 min ( 886.4 - 884.5 ) Proposed Pants Project Culvert Post -Development Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 31 Volume Invert Avail.Storage Storage Description #1 678.60' 7,652 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-fit) (cubic -feet) (cubic -feet) 678.60 20 0 0 680.00 164 129 129 682.00 753 917 1,046 684.00 1,472 2,225 3,271 686.00 2,909 4,381 7,652 Device Routing Invert Outlet Devices #1 Primary 681.12' 36.0" Round Culvert L= 40.0' CPP, end -section conforming to fill, Ke= 0.500 Inlet/Outlet Invert= 681.12'/ 679.65' S=0.0368? Cc=0.900 n=0.011 Primary OutFlow Max=33.25 cfs@ 12.14 hrs HW=683.59' (Free Discharge) L1=Culvert (Inlet Controls 33.25 cfs @ 5.35 fps) Summary for Pond 51p: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious, Inflow Depth > 1.30" for 10yr event Inflow = 44.54 cfs@ 12.14 hm Volume= 3.627 of Outflow = 20.15 cfs@ 12.37 hm Volume= 3.096 at,, Atten= 55% Lag= 14.1 min Primary = 20.15 cfs@ 12.37 hrs, Volume= 3.096 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 683.58'@ 12.37 hrs Surf.Area= 28,980 sf Storage= 40,686 cf Plug -Flow detention time=115.3 min calculated for 3.095 of (85% of inflow) Center -of -Mass det. time=47.3 min ( 933.7 - 886.4 ) Volume Invert Avail.Storage Storage Description #1 682.00' 84,955 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 682.00 22,442 0 0 684.00 30,705 53,147 53,147 685.00 32,911 31,808 84,955 Device Routing Invert Outlet Devices #1 Primary 676.00' 30.0" Round Culvert L= 73.9' Ke= 0.400 Inlet / Outlet Invert= 676.00' / 674.00' S= 0.0271 ? Cc= 0.900 n= 0.013 #2 Device 1 682.00' 8.0" Vert. OrificelGrate C= 0.600 #3 Device 1 683.00' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 684.00' 20.0' long x 20.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Proposed Pants Project Culvert Post -Development Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 32 Primary OutFlow Max=20.14 cfs@ 12.37 hrs HW=683.58' (Free Discharge) 1=Culvert (Passes 20.14 cfs of 63.73 cfs potential flow) 2=Orifice/Grate (Orifice Controls 1.88 cfs @ 5.38 fps) 1 3=Riser (Weir Controls 18.27 cfs @ 2.50 fps) =Broad -Crested Rectangular Weir ( Controls 0.00 cfs) Proposed Pants Project Culvert Post -Development Type // 24-hr 25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 33 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>2.27" Tc=9.6 min CN=58 Runoff=1.02 cfs 0.055 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious RunoffDepth>1.99" Tc=18.0 min CN=55 Runoff=4.08 cfs 0.307 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>1.99" Tc=15.3 min CN=55 Runoff=12.48 cfs 0.854 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>2.08" Tc=18.2 min CN=56 Runoff=56.19 cfs 4.210 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious Runoff Depth>2.08" Tc=15.7 min CN=56 Runoff=2.16 cfs 0.148 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious Runoff Depth>2.27" Tc=5.0 min CN=58 Runoff=5.10 cfs 0.229 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>2.17" Tc=13.7 min CN=57 Runoff=2.69 cfs 0.171 of SubcatchmentTD.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>2.26" Tc=13.1 min CN=58 Runoff=1.01 cfs 0.063 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>2.84" Tc=9.3 min CN=64 Runoff=0.43 cfs 0.023 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>2.74" Tc=12.2 min CN=63 Runoff=1.32 cfs 0.077 of Subcatchmentl0:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>2.55" Tc=8.0 min CN=61 Runoff=0.84 cfs 0.042 of Subcatchment1l:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>2.94" Tc=5.1 min CN=65 Runoff=0.69 cfs 0.031 of Subcatchment12:D.A.12 Runoff Area=28,264sf 0.00%Impervious RunoffDepth>3.55" Tc=10.3 min CN=71 Runoff=3.52 cfs 0.192 of Pond 3P: FOREBAY#1 Peak Elev=682.53' Storage=1,670 cf Inflow=12.48 cfs 0.854 of 24.0" Round Culvert n=0.013 L=40.6' 5=0.0197'P Outflow=12.20 cfs 0.841 of Pond 4P: FOREBAY#2 Peak EIev=685.07' Storage=5,615 cf Inflow=56.19 cfs 4.210 of 36.0" Round Culvert n=0.011 L=40.0' 5=0.0368'P Outflow=53.27 cfs 4.192 of Pond 5P: Level 2 Wet Pond Peak EIev=684.09' Storage=55,987 cf Inflow=71.44 cfs 5.717 of Outflow=50.65 cfs 5.135 of Proposed Pants Project Culvert Post -Development Type // 24-hr 25yr Rainfall-6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 34 Total Runoff Area = 36.394 ac Runoff Volume = 6.402 of Average Runoff Depth = 2.11" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac Proposed Pants Project Culvert Post -Development Type 1124-hr25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 35 Summary for Subcatchment 1: D.AA Runoff = 1.02 cfs @ 12.02 hrs, Volume= 0.055 at Depth> 2.27" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 4.08 cfs @ 12.12 hrs, Volume= 0.307 at Depth> 1.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 12.48 cfs@ 12.09 hrs, Volume= 0.854 at Depth> 1.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" Proposed Pants Project Culvert Post -Development Type 1124-hr25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 36 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 56.19 cfs@ 12.12 hm Volume= 4.210 at Depth> 2.08" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 2.16 cfs @ 12.09 hrs, Volume= 0.148 at Depth> 2.08" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, Proposed Pants Project Culvert Post -Development Type 1124-hr25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 37 Summary for Subcatchment 5A: POND DA Runoff = 5.10 cfs @ 11.97 hrs, Volume= 0.229 at Depth> 2.27" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 2.69 cfs @ 12.07 hrs, Volume= 0.171 at Depth> 2.17" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 1.01 cfs @ 12.06 hrs, Volume= 0.063 at Depth> 2.26" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" Proposed Pants Project Culvert Post -Development Type 1124-hr25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 38 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.43 cfs @ 12.01 hrs, Volume= 0.023 at Depth> 2.84" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 1.32 cfs @ 12.05 hrs, Volume= 0.077 at Depth> 2.74" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, Proposed Pants Project Culvert Post -Development Type 1124-hr25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 39 Summary for Subcatchment 10: D.A.10 Runoff = 0.84 cfs @ 12.00 hrs, Volume= 0.042 at Depth> 2.55" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 0.69 cfs @ 11.97 hrs, Volume= 0.031 at Depth> 2.94" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 3.52 cfs @ 12.02 hrs, Volume= 0.192 at Depth> 3.55" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area Proposed Pants Project Culvert Post -Development Type 1124-hr25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 40 Tc Length Description 10.3 Direct Entry, Summary for Pond 31p: FOREBAY#1 Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 1.99" for 25yr event Inflow = 12.48 cfs@ 12.09 hrs, Volume= 0.854 of Outflow = 12.20 cfs@ 12.11 hrs, Volume= 0.841 af, Aden= 2% Lag= 1.4 min Primary = 12.20 cfs@ 12.11 hrs, Volume= 0.841 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 682.53'@ 12.11 hrs Surf.Area=1,011 sf Storage=1,670 cf Plug -Flow detention time=12.5 min calculated for 0.841 of (99%of inflow) Center -of -Mass det. time=4.1 min ( 874.4 - 870.3 ) Volume Invert Avail.Storage Storage Description #1 678.45' 3,447 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.45 20 0 0 680.00 163 142 142 682.00 868 1,031 1,173 684.00 1,406 2,274 3,447 Device Routing Invert Outlet Devices #1 Primary 680.95' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 680.95' / 680.15' S= 0.0197'f Cc= 0.900 n= 0.013 Primary OutFlow Max=12.20 cfs@ 12.11 hrs HW=682.53' (Free Discharge) L1=Culvert (Inlet Controls 12.20 cfs @ 4.58 fps) Summary for Pond 4P: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious, Inflow Depth > 2.08" for 25yr event Inflow = 56.19 cfs@ 12.12 hrs, Volume= 4.210 of Outflow = 53.27 cfs @ 12.16 hrs, Volume= 4.192 af, Atten= 51/c, Lag= 2.8 min Primary = 53.27 cfs@ 12.16 hrs, Volume= 4.192 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 685.07'@ 12.16 hrs Surf.Area= 2,241 sf Storage= 5,615 cf Plug -Flow detention time=4.2 min calculated for 4.192 of (100%of inflow) Center -of -Mass det. time=1.6 min ( 871.3 - 869.7 ) Proposed Pants Project Culvert Post -Development Type 1124-hr25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 41 Volume Invert Avail.Storage Storage Description #1 678.60' 7,652 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-fit) (cubic -feet) (cubic -feet) 678.60 20 0 0 680.00 164 129 129 682.00 753 917 1,046 684.00 1,472 2,225 3,271 686.00 2,909 4,381 7,652 Device Routing Invert Outlet Devices #1 Primary 681.12' 36.0" Round Culvert L= 40.0' CPP, end -section conforming to fill, Ke= 0.500 Inlet/Outlet Invert= 681.12'/ 679.65' S=0.0368? Cc=0.900 n=0.011 Primary OutFlow Max=53.25 cfs@ 12.16 hrs HW=685.07' (Free Discharge) L1=Culvert (Inlet Controls 53.25 cfs @ 7.53 fps) Summary for Pond 51p: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious, Inflow Depth > 2.05" for 25yr event Inflow = 71.44 cfs@ 12.14 hm Volume= 5.717 of Outflow = 50.65 cfs @ 12.28 hrs, Volume= 5.135 at,, Atten= 29% Lag= 8.3 min Primary = 50.65 cfs@ 12.28 hrs, Volume= 5.135 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 684.09'@ 12.28 hrs Surf.Area= 30,908 sf Storage= 55,987 cf Plug -Flow detention time=79.1 min calculated for 5.133 of (90% of inflow) Center -of -Mass det. time=28.6 min ( 899.7 - 871.1) Volume Invert Avail.Storage Storage Description #1 682.00' 84,955 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 682.00 22,442 0 0 684.00 30,705 53,147 53,147 685.00 32,911 31,808 84,955 Device Routing Invert Outlet Devices #1 Primary 676.00' 30.0" Round Culvert L= 73.9' Ke= 0.400 Inlet / Outlet Invert= 676.00' / 674.00' S= 0.0271 ? Cc= 0.900 n= 0.013 #2 Device 1 682.00' 8.0" Vert. OrificelGrate C= 0.600 #3 Device 1 683.00' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 684.00' 20.0' long x 20.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Proposed Pants Project Culvert Post -Development Type 1124-hr25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD®9.10 s/n 07054 ©2010 HydroCAD Software Solutions LLC Page 42 Primary OutFlow Max=50.60 cfs@ 12.28 hrs HW=684.09' (Free Discharge) Culvert (Passes 49.11 cfs of 66.24 cfs potential flow) 2=Orifice/Grate (Orifice Controls 2.23 cfs @ 6.39 fps) 3=Riser (Weir Controls 46.88 cfs @ 3.42 fps) =Broad -Crested Rectangular Weir (Weir Controls 1.49 cfs @ 0.81 fps) Proposed Pants Project Culvert Post -Development Type // 24-hr 100yr Rainfall=9.07" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 43 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>3.90" Tc=9.6 min CN=58 Runoff=1.78 cfs 0.094 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious Runoff Depth>3.52" Tc=18.0 min CN=55 Runoff=7.58 cfs 0.544 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>3.52" Tc=15.3 min CN=55 Runoff=23.06 cfs 1.513 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>3.64" Tc=18.2 min CN=56 Runoff=102.93 cfs 7.386 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious RunoffDepth>3.64" Tc=15.7 min CN=56 Runoff=3.93 cfs 0.260 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious RunoffDepth>3.90" Tc=5.0 min CN=58 Runoff=8.82 cfs 0.394 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>3.77" Tc=13.7 min CN=57 Runoff=4.80 cfs 0.297 of Subcatchment7:D.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>3.89" Tc=13.1 min CN=58 Runoff=1.78 cfs 0.108 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>4.64" Tc=9.3 min CN=64 Runoff=0.71 cfs 0.037 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>4.51" Tc=12.2 min CN=63 Runoff=2.18 cfs 0.127 of SubcatchmentlO:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>4.27" Tc=8.0 min CN=61 Runoff=1.42 cfs 0.071 of Subcatchment1l:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>4.77" Tc=5.1 min CN=65 Runoff=1.10 cfs 0.050 of Subcatchment12:D.A.12 Runoff Area=28,264sf 0.00%Impervious Runoff Depth>5.51" Tc=10.3 min CN=71 Runoff=5.41 cfs 0.298 of Pond 3P: FOREBAY#1 Peak Elev=683.72' Storage=3,069 cf Inflow=23.06 cfs 1.513 of 24.0" Round Culvert n=0.013 L=40.6' S=0.0197'P Outflow=21.59 cfs 1.500 of Pond 4P: FOREBAY#2 Peak EIev=695.70' Storage=7,652 cf Inflow=102.93 cfs 7.386 of 36.0" Round Culvert n=0.011 L=40.0' S=0.0368'P Outflow=123.11 cfs 7.366 of Pond 5P: Level 2 Wet Pond Peak EIev=684.81' Storage=78,862 cf Inflow=157.71 cfs 10.064 of Outflow=108.40 cfs 9.447 of Proposed Pants Project Culvert Post -Development Type /124-hr 100yr Rainfall=9.07" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 44 Total Runoff Area = 36.394 ac Runoff Volume=11.179 of Average Runoff Depth = 3.69" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac Proposed Pants Project Culvert Post -Development Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 45 Summary for Subcatchment 1: D.AA Runoff = 1.78 cfs @ 12.02 hrs, Volume= 0.094 at Depth> 3.90" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 7.58 cfs @ 12.11 hrs, Volume= 0.544 at Depth> 3.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 23.06 cfs@ 12.08 hrs, Volume= 1.513 at Depth> 3.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 100yr Rainfall=9.07' Proposed Pants Project Culvert Post -Development Type // 24-hr f00yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 46 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 102.93 cfs@ 12.11 hrs, Volume= 7.386 at Depth> 3.64" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 3.93 cfs @ 12.09 hrs, Volume= 0.260 at Depth> 3.64" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, Proposed Pants Project Culvert Post -Development Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 47 Summary for Subcatchment 5A: POND DA Runoff = 8.82 cfs @ 11.96 hrs, Volume= 0.394 at Depth> 3.90" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 4.80 cfs @ 12.06 hrs, Volume= 0.297 at Depth> 3.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 1.78 cfs @ 12.05 hrs, Volume= 0.108 at Depth> 3.89" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 100yr Rainfall=9.07' Proposed Pants Project Culvert Post -Development Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 48 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.71 cfs@ 12.01 hrs, Volume= 0.037 at Depth> 4.64" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 2.18 cfs @ 12.04 hrs, Volume= 0.127 at Depth> 4.51" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, Proposed Pants Project Culvert Post -Development Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 49 Summary for Subcatchment 10: D.A.10 Runoff = 1.42 cfs @ 12.00 hrs, Volume= 0.071 at Depth> 4.27" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 1.10 cfs @ 11.96 hm Volume= 0.050 at Depth> 4.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 5.41 cfs @ 12.02 hrs, Volume= 0.298 at Depth> 5.51" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area Proposed Pants Project Culvert Post -Development Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 50 Tc Length Description 10.3 Direct Entry, Summary for Pond 3P: F0REBAY#1 Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 3.52" for 100yr event Inflow = 23.06 cfs@ 12.08 hrs, Volume= 1.513 of Outflow = 21.59 cfs@ 12.12 hrs, Volume= 1.500 af, Atten= 6%n Lag= 2.5 min Primary = 21.59 cfs@ 12.12 hrs, Volume= 1.500 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 683.72'@ 12.12 hrs Surf.Area=1,332 sf Storage= 3,069 cf Plug -Flow detention time=8.3 min calculated for 1.499 of (99% of inflow) Center -of -Mass det. time=3.2 min ( 856.1 - 852.9 ) Volume Invert Avail.Storage Storage Description #1 678.45' 3,447 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.45 20 0 0 680.00 163 142 142 682.00 868 1,031 1,173 684.00 1,406 2,274 3,447 Device Routing Invert Outlet Devices #1 Primary 680.95' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 680.95' / 680.15' S= 0.0197 ? Cc= 0.900 n= 0.013 Primary OutFlow Max=21.57 cfs@ 12.12 hrs HW=683.72' (Free Discharge) L1=Culvert (Inlet Controls 21.57 cis @ 6.87 fps) Summary for Pond 4P: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious Inflow Depth > 3.64" for 100yr event Inflow = 102.93 cfs@ 12.11 hrs Volume= 7.386 of Outflow = 123.11 cfs@ 12.12 hrs, Volume= 7.366 af, Atten= 0%n Lag= 0.5 min Primary = 123.11 cfs@ 12.12 hrs, Volume= 7.366 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 695.70'@ 12.12 hrs Surf.Area= 2,909 sf Storage= 7,652 cf Plug -Flow detention time=3.0 min calculated for 7.363 of (100%of inflow) Center -of -Mass det. time=1.5 min ( 854.3 - 852.9 ) Proposed Pants Project Culvert Post -Development Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 51 Volume Invert Avail.Storage Storage Description #1 678.60' 7,652 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-fit) (cubic -feet) (cubic -feet) 678.60 20 0 0 680.00 164 129 129 682.00 753 917 1,046 684.00 1,472 2,225 3,271 686.00 2,909 4,381 7,652 Device Routing Invert Outlet Devices #1 Primary 681.12' 36.0" Round Culvert L= 40.0' CPP, end -section conforming to fill, Ke= 0.500 Inlet/Outlet Invert= 681.12'/ 679.65' S=0.0368? Cc=0.900 n=0.011 Primary OutFlow Max=122.90 cis@ 12.12 hrs HW=695.66' (Free Discharge) L1=Culvert (Inlet Controls 122.90 cfs @ 17.39 fps) Summary for Pond 5P: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious, Inflow Depth > 3.61" for 100yr event Inflow = 157.71 cfs@ 12.12 hrs, Volume= 10.064 of Outflow = 108.40 cfs@ 12.21 hrs, Volume= 9.447 at,, Atten= 31% Lag= 5.5 min Primary = 108.40 cfs@ 12.21 hrs, Volume= 9.447 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 684.81'@ 12.21 hrs Surf.Area= 32,500 sf Storage= 78,862 cf Plug -Flow detention time=51.3 min calculated for 9.443 of (94% of inflow) Center -of -Mass det. time=18.7 min ( 872.7 - 853.9 ) Volume Invert Avail.Storage Storage Description #1 682.00' 84,955 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 682.00 22,442 0 0 684.00 30,705 53,147 53,147 685.00 32,911 31,808 84,955 Device Routing Invert Outlet Devices #1 Primary 676.00' 30.0" Round Culvert L= 73.9' Ke= 0.400 Inlet / Outlet Invert= 676.00' / 674.00' S= 0.0271 ? Cc= 0.900 n= 0.013 #2 Device 1 682.00' 8.0" Vert. OrificelGrate C= 0.600 #3 Device 1 683.00' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 684.00' 20.0' long x 20.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Proposed Pants Project Culvert Post -Development Type I/ 24-hr 100yr Rainfall=9.07" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 52 Primary OutFlow Max=108.35 cfs@ 12.21 hrs HW=684.81' (Free Discharge) 1=Culvert (Inlet Controls 69.64 cfs @ 14.19 fps) �2=Orifice/Grate (Passes < 2.65 cfs potential flow) 3=Riser (Passes < 81.47 cfs potential flow) =Broad•Crested Rectangular Weir (Weir Controls 38.70 cfs @ 2.38 fps) O 5P D.A.5 t Pond D.A.2 / 1 3 P FOREBAY#1 O D.A.3 (9) (8) D.A.9 D.A.8 C7) O D.A.7 D.A.6 4P Q\ OREBAY#2 O D.A.4 POND DA Subcat Reach Aon Link As -Built Pants Project Culvert Post -Development AS -BUILT REV Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 33.215 55 Woods, Good, HSG B (1, 2, 3, 4, 5, 5A, 6, 7, 8, 9, 10, 11) 2.229 61 >75%Grass cover, Good, HSG B (1, 2, 3, 4, 5, 5A, 6, 7, 8, 9, 10, 11, 12) 0.949 85 Gravel roads, HSG B (1, 2, 3, 4, 5, 5A, 6, 7, 8, 9, 10, 11, 12) 36.394 TOTAL AREA As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 1yr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 3 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>0.29" Tc=9.6 min CN=58 Runoff=0.07 cfs 0.007 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious RunoffDepth>0.20" Tc=18.0 min CN=55 Runoff=0.14 cfs 0.031 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>0.20" Tc=15.3 min CN=55 Runoff=0.42 cfs 0.087 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>0.23" Tc=18.2 min CN=56 Runoff=2.41 cfs 0.464 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious Runoff Depth>0.23" Tc=15.7 min CN=56 Runoff=0.09 cfs 0.016 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious RunoffDepth>0.29" Tc=5.0 min CN=58 Runoff=0.40 cfs 0.029 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>0.26" Tc=13.7 min CN=57 Runoff=0.15 cfs 0.020 of Subcatchment7:D.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>0.28" Tc=13.1 min CN=58 Runoff=0.07 cfs 0.008 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>0.48" Tc=9.3 min CN=64 Runoff=0.06 cfs 0.004 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>0.45" Tc=12.2 min CN=63 Runoff=0.16 cfs 0.013 of Subcatchmentl0:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>0.38" Tc=8.0 min CN=61 Runoff=0.09 cfs 0.006 of Subcatchmentll:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>0.52" Tc=5.1 min CN=65 Runoff--O. 11 cfs 0.005 of Subcatchmentl2:D.A.12 Runoff Area=28,264sf 0.00%Impervious RunoffDepth>0.78" Tc=10.3 min CN=71 Runoff=0.73 cfs 0.042 of Pond 3P: FOREBAY#1 Peak EIev=680.22' Storage=48 cf Inflow=0.42 cfs 0.087 of 24.0" Round Culvert n=0.013 L=40.6' 5=0.0123'P Oufflow=0.41 cfs 0.087 of Pond 4P: FOREBAY#2 Peak EIev=684.51' Storage=791 cf Inflow=2.41 cfs 0.464 of 36.0" Round Culvert n=0.011 L=40.0' 5=0.1125'P Outflow=2.17 cfs 0.458 of Pond 5P: Level 2 Wet Pond Peak EIev=678.91' Storage=12,010 cf Inflow=2.83 cfs 0.621 of Outflow=0.46 cfs 0.374 of As -Built Pants Project Culvert Post -Development AS -BUILT REV Type/1 24-hr 1 yr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 4 Total Runoff Area = 36.394 ac Runoff Volume = 0.733 of Average Runoff Depth = 0.24" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr lyr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 1: D.AA Runoff = 0.07 cfs @ 12.06 hrs, Volume= 0.007 at Depth> 0.29" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 0.14 cfs @ 12.22 hm Volume= 0.031 at Depth> 0.20" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 0.42 cfs @ 12.16 hrs, Volume= 0.087 at Depth> 0.20" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr lyr Rainfall=3.04" As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr lyr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 6 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 2.41 cfs @ 12.20 hrs, Volume= 0.464 at Depth> 0.23" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 0.09 cfs @ 12.16 hrs, Volume= 0.016 at Depth> 0.23" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr lyr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 5A: POND DA Runoff = 0.40 cfs @ 12.00 hrs, Volume= 0.029 at Depth> 0.29" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 0.15 cfs @ 12.12 hm Volume= 0.020 at Depth> 0.26" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 0.07 cfs @ 12.10 hm Volume= 0.008 at Depth> 0.28" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr lyr Rainfall=3.04" As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr lyr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 8 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.06 cfs @ 12.03 hrs, Volume= 0.004 at Depth> 0.48" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 0.16 cfs @ 12.07 hrs, Volume= 0.013 at Depth> 0.45" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr lyr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 10: D.A.10 Runoff = 0.09 cfs @ 12.02 hrs, Volume= 0.006 at Depth> 0.38" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 0.11 cfs @ 11.98 hrs, Volume= 0.005 at Depth> 0.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 0.73 cfs @ 12.03 hrs, Volume= 0.042 at Depth> 0.78" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr lyr Rainfall=3.04" 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 1 yr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 10 Tc Length Description 10.3 Direct Entry, Summary for Pond 3P: F0REBAY#1 Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 0.20" for lyr event Inflow = 0.42 cfs @ 12.16 hrs, Volume= 0.087 of Outflow = 0.41 cfs @ 12.19 hrs, Volume= 0.087 af, Atten= 2% Lag= 1.5 min Primary = 0.41 cfs @ 12.19 hrs, Volume= 0.087 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 680.22'@ 12.19 hrs Surf.Area= 241 sf Storage= 48 cf Plug -Flow detention time=3.3 min calculated for 0.087 of (100% of inflow) Center -of -Mass det. time=1.8 min ( 974.3 - 972.6 ) Volume Invert Avail.Storage Storage Description #1 679.97' 3,308 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 679.97 20 0 0 680.00 163 3 3 682.00 868 1,031 1,034 684.00 1,406 2,274 3,308 Device Routing Invert Outlet Devices #1 Primary 679.97' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 679.97' / 679.47' S= 0.0123 ? Cc= 0.900 n= 0.013 Primary OutFlow Max=0.41 cfs@ 12.19 hrs HW=680.22' (Free Discharge) L1=Culvert (Barrel Controls 0.41 cfs @ 2.75 fps) Summary for Pond 4P: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious, Inflow Depth > 0.23" for 1yr event Inflow = 2.41 cfs @ 12.20 hrs, Volume= 0.464 of Outflow = 2.17 cfs @ 12.27 hrs, Volume= 0.458 af, Atten=10% Lag= 4.6 min Primary = 2.17 cfs @ 12.27 hrs, Volume= 0.458 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 684.51'@ 12.27 hrs Surf.Area= 850 sf Storage= 791 cf Plug -Flow detention time=12.3 min calculated for 0.457 of (99%of inflow) Center -of -Mass det. time=6.2 min ( 970.9 - 964.6 ) As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 1 yr Rainfall=3.04" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 11 Volume Invert Avail.Storage Storage Description #1 683.97' 2,753 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 683.97 20 0 0 685.85 2,909 2,753 2,753 Device Routing Invert Outlet Devices #1 Primary 683.97' 36.0" Round Culvert L= 40.0' CPR end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 683.97' / 679.47' S= 0.1125 ? Cc= 0.900 n= 0.011 Primary OutFlow Max=2.17 cis@ 12.27 hrs HW=684.51' (Free Discharge) L1=Culvert (Inlet Controls 2.17 cfs @ 2.50 fps) Summary for Pond 5P: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious, Inflow Depth > 0.22" for lyr event Inflow = 2.83 cfs@ 12.26 hrs, Volume= 0.621 of Outflow = 0.46 cfs @ 18.45 hrs, Volume= 0.374 af, Atten= 84% Lag= 371.2 min Primary = 0.46 cfs @ 18.45 hrs, Volume= 0.374 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 678.91'@ 18.45 hrs Surf.Area= 30,907 sf Storage=12,010 cf Plug -Flow detention time=296.9 min calculated for 0.374 of (60% of inflow) Center -of -Mass det. time=148.6 min (1,118.4 - 969.9 ) Volume Invert Avail.Storage Storage Description #1 678.52' 135,184 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.52 30,705 0 0 682.77 32,911 135,184 135,184 Device Routing Invert Outlet Devices #1 Primary 668.77' 30.0" Round Culvert L= 85.5' Ke= 0.400 Inlet / Outlet Invert= 668.77' / 665.23' S= 0.0414'f Cc= 0.900 n= 0.013 #2 Device 1 678.52' 7.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 679.52' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 681.36' 15.4' long x 13.5' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.62 2.66 2.70 2.66 2.65 2.66 2.65 2.63 Primary OutFlow Max=0.46 cis@ 18.45 hrs HW=678.91' (Free Discharge) 1=Culvert (Passes 0.46 cis of 75.50 cfs potential flow) �2=Orifice/Grate (Orifice Controls 0.46 cfs @ 2.00 fps) 3=Riser ( Controls 0.00 cfs) =Broad -Crested Rectangular Weir ( Controls 0.00 cfs) As -Built Pants Project Culvert Post -Development AS -BUILT REV Type/1 24-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 12 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>0.52" Tc=9.6 min CN=58 Runoff=0.18 cfs 0.013 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious RunoffDepth>0.40" Tc=18.0 min CN=55 Runoff=0.50 cfs 0.062 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>0.41" Tc=15.3 min CN=55 Runoff=1.56 cfs 0.174 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>0.44" Tc=18.2 min CN=56 Runoff=7.68 cfs 0.896 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious Runoff Depth>0.44" Tc=15.7 min CN=56 Runoff=0.30 cfs 0.032 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious Runoff Depth>0.52" Tc=5.0 min CN=58 Runoff=0.97 cfs 0.053 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>0.48" Tc=13.7 min CN=57 Runoff=0.42 cfs 0.038 of Subcatchment7:D.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>0.52" Tc=13.1 min CN=58 Runoff=0.17 cfs 0.014 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>0.80" Tc=9.3 min CN=64 Runoff--O. 11 cfs 0.006 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>0.75" Tc=12.2 min CN=63 Runoff=0.31 cfs 0.021 of Subcatchmentl0:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>0.65" Tc=8.0 min CN=61 Runoff=0.19 cfs 0.011 of Subcatchmentll:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>0.85" Tc=5.1 min CN=65 Runoff--O. 19 cfs 0.009 of Subcatchmentl2:D.A.12 Runoff Area=28,264sf 0.00%Impervious Runoff Depth>1.18" Tc=10.3 min CN=71 Runoff=1.14 cfs 0.064 of Pond 3P: FOREBAY#1 Peak EIev=680.47' Storage=118 cf Inflow=1.56 cfs 0.174 of 24.0" Rand Culvert n=0.013 L=40.6' 5=0.0123'P Outflow=1.54 cfs 0.174 of Pond 4P: FOREBAY#2 Peak EIev=685.00' Storage=1,507 cf Inflow=7.68 cfs 0.896 of 36.0" Round Culvert n=0.011 L=40.0' 5=0.11257 Outflow=7.41 cfs 0.889 of Pond 5P: Level 2 Wet Pond Peak EIev=679.21' Storage=21,317 cf Inflow=9.76 cfs 1.210 of Outflow=1.07 cfs 0.854 of As -Built Pants Project Culvert Post -Development AS -BUILT REV Type/1 24-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 13 Total Runoff Area = 36.394 ac Runoff Volume =1.393 of Average Runoff Depth = 0.46" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 14 Summary for Subcatchment 1: D.A.1 Runoff = 0.18 cfs @ 12.04 hrs, Volume= 0.013 at Depth> 0.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 0.50 cfs @ 12.16 hrs, Volume= 0.062 at Depth> 0.40" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 1.56 cfs @ 12.12 hrs, Volume= 0.174 af, Depth> 0.41" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 2yr Rainfall=3.68" As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 15 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 7.68 cfs @ 12.16 hrs, Volume= 0.896 at Depth> 0.44" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 0.30 cfs @ 12.12 hrs, Volume= 0.032 at Depth> 0.44" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 1124-hr 2yr Rainfall=3.68" Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 16 Summary for Subcatchment 5A: POND DA Runoff = 0.97 cfs @ 11.98 hrs, Volume= 0.053 at Depth> 0.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 0.42 cfs @ 12.10 hrs, Volume= 0.038 at Depth> 0.48" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 0.17 cfs @ 12.08 hrs, Volume= 0.014 at Depth> 0.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 2yr Rainfall=3.68" As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 17 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.11 cfs @ 12.02 hrs, Volume= 0.006 at Depth> 0.80" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 0.31 cfs@ 12.06 hrs, Volume= 0.021 at Depth> 0.75" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 1124-hr 2yr Rainfall=3.68" Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 18 Summary for Subcatchment 10: D.A.10 Runoff = 0.19 cfs@ 12.01 hrs, Volume= 0.011 at Depth> 0.65" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 0.19 cfs @ 11.97 hrs, Volume= 0.009 at Depth> 0.85" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 1.14 cfs @ 12.03 hm Volume= 0.064 af, Depth> 1.18" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 2yr Rainfall=3.68" 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area As -Built Pants Project Culvert Post -Development AS -BUILT REV Type H 24-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 19 Tc Length Description 10.3 Direct Entry, Summary for Pond 3P: F0REBAY#1 Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 0.41" for 2yr event Inflow = 1.56 cfs @ 12.12 hrs, Volume= 0.174 of Outflow = 1.54 cfs@ 12.14 hrs, Volume= 0.174 at Atten=1%q Lag= 1.1 min Primary = 1.54 cfs @ 12.14 hrs, Volume= 0.174 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 680.47'@ 12.14 hrs Surf.Area= 329 sf Storage=118 cf Plug -Flow detention time=2.5 min calculated for 0.174 of (100%of inflow) Center -of -Mass det. time=1.4 min ( 935.2 - 933.8 ) Volume Invert Avail.Storage Storage Description #1 679.97' 3,308 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 679.97 20 0 0 680.00 163 3 3 682.00 868 1,031 1,034 684.00 1,406 2,274 3,308 Device Routing Invert Outlet Devices #1 Primary 679.97' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 679.97' / 679.47' S= 0.0123 ? Cc= 0.900 n= 0.013 Primary OutFlow Max=1.53 cfs@ 12.14 hrs HW=680.47' (Free Discharge) L1=Culvert (Barrel Controls 1.53 cfs @ 3.76 fps) Summary for Pond 4P: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious Inflow Depth > 0.44" for 2yr event Inflow = 7.68 cfs @ 12.16 hrs Volume= 0.896 of Outflow = 7.41 cfs @ 12.20 hrs Volume= 0.889 af, Atten= 4%n Lag= 2.4 min Primary = 7.41 cfs @ 12.20 hrs Volume= 0.889 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 685.00'@ 12.20 hrs Surf.Area=1,601 sf Storage=1,507 cf Plug -Flow detention time=8.6 min calculated for 0.889 of (99% of inflow) Center -of -Mass det. time=4.4 min ( 933.7 - 929.3 ) As -Built Pants Project Culvert Post -Development AS -BUILT REV Type H 24-hr 2yr Rainfall=3.68" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 20 Volume Invert Avail.Storage Storage Description #1 683.97' 2,753 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 683.97 20 0 0 685.85 2,909 2,753 2,753 Device Routing Invert Outlet Devices #1 Primary 683.97' 36.0" Round Culvert L= 40.0' CPP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 683.97' / 679.47' S= 0.1125 ? Cc= 0.900 n= 0.011 Primary OutFlow Max=7.40 cis@ 12.20 hrs HW=685.00' (Free Discharge) L1=Culvert (Inlet Controls 7.40 cfs @ 3.45 fps) Summary for Pond 5P: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious, Inflow Depth > 0.43" for 2yr event Inflow = 9.76 cfs @ 12.19 hrs, Volume= 1.210 of Outflow = 1.07 cfs @ 15.58 hrs, Volume= 0.854 af, Atten= 89% Lag= 203.7 min Primary = 1.07 cfs @ 15.58 hrs, Volume= 0.854 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 679.21'@ 15.58 hrs Surf.Area= 31,063 sf Storage= 21,317 cf Plug -Flow detention time=259.3 min calculated for 0.854 of (71 % of inflow) Center -of -Mass det. time=141.6 min (1,074.3 - 932.8 ) Volume Invert Avail.Storage Storage Description #1 678.52' 135,184 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.52 30,705 0 0 682.77 32,911 135,184 135,184 Device Routing Invert Outlet Devices #1 Primary 668.77' 30.0" Round Culvert L= 85.5' Ke= 0.400 Inlet / Outlet Invert= 668.77' / 665.23' S= 0.0414'f Cc= 0.900 n= 0.013 #2 Device 1 678.52' 7.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 679.52' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 681.36' 15.4' long x 13.5' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.62 2.66 2.70 2.66 2.65 2.66 2.65 2.63 Primary OutFlow Max=1.07 cis@ 15.58 hrs HW=679.21' (Free Discharge) 1=Culvert (Passes 1.07 cis of 76.77 cfs potential flow) �2=Orifice/Grate (Orifice Controls 1.07 cfs @ 2.67 fps) 3=Riser ( Controls 0.00 cfs) =Broad -Crested Rectangular Weir ( Controls 0.00 cfs) As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 21 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>1.47" Tc=9.6 min CN=58 Runoff=0.64 cfs 0.036 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious RunoffDepth>1.25" Tc=18.0 min CN=55 Runoff=2.39 cfs 0.193 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>1.25" Tc=15.3 min CN=55 Runoff=7.35 cfs 0.539 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>1.32" Tc=18.2 min CN=56 Runoff=33.52 cfs 2.682 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious Runoff Depth>1.32" Tc=15.7 min CN=56 Runoff=1.29 cfs 0.095 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious Runoff Depth>1.47" Tc=5.0 min CN=58 Runoff=3.24 cfs 0.149 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>1.40" Tc=13.7 min CN=57 Runoff=1.65 cfs 0.110 of Subcatchment7:D.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>1.47" Tc=13.1 min CN=58 Runoff=0.63 cfs 0.041 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>1.94" Tc=9.3 min CN=64 Runoff=0.29 cfs 0.016 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>1.85" Tc=12.2 min CN=63 Runoff=0.87 cfs 0.052 of Subcatchmentl0:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>1.70" Tc=8.0 min CN=61 Runoff=0.55 cfs 0.028 of Subcatchmentll:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>2.02" Tc=5.1 min CN=65 Runoff=0.47 cfs 0.021 of Subcatchmentl2:D.A.12 Runoff Area=28,264sf 0.00%Impervious RunoffDepth>2.53" Tc=10.3 min CN=71 Runoff=2.51 cfs 0.137 of Pond 3P: FOREBAY#1 Peak Elev=681.19' Storage=448 cf Inflow=7.35 cfs 0.539 of 24.0" Round Culvert n=0.013 L=40.6' 5=0.0123'P Outflow=7.26 cfs 0.538 of Pond 4P: FOREBAY#2 Peak EIev=686.60' Storage=2,753 cf Inflow=33.52 cfs 2.682 of 36.0" Round Culvert n=0.011 L=40.0' 5=0.1125'P Outflow=36.24 cfs 2.671 of Pond 5P: Level 2 Wet Pond Peak EIev=679.99' Storage=45,842 cf Inflow=47.68 cfs 3.646 of Outflow=16.18 cfs 3.067 of As -Built Pants Project Culvert Post -Development AS -BUILT REV Type II 24-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 22 Total Runoff Area = 36.394 ac Runoff Volume = 4.097 of Average Runoff Depth =1.35" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 23 Summary for Subcatchment 1: D.AA Runoff = 0.64 cfs @ 12.02 hrs, Volume= 0.036 at Depth> 1.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 2.39 cfs @ 12.13 hrs, Volume= 0.193 at Depth> 1.25" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 7.35 cfs @ 12.09 hrs, Volume= 0.539 at Depth> 1.25" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 10yr Rainfall=5.54" As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 24 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 33.52 cfs@ 12.13 hrs, Volume= 2.682 at Depth> 1.32" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 1.29 cfs @ 12.09 hrs, Volume= 0.095 at Depth> 1.32" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 25 Summary for Subcatchment 5A: POND DA Runoff = 3.24 cfs @ 11.97 hrs, Volume= 0.149 at Depth> 1.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 1.65 cfs @ 12.07 hrs, Volume= 0.110 at Depth> 1.40" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 0.63 cfs @ 12.07 hrs, Volume= 0.041 at Depth> 1.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 10yr Rainfall=5.54" As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 26 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.29 cfs @ 12.02 hrs, Volume= 0.016 at Depth> 1.94" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 0.87 cfs @ 12.05 hrs, Volume= 0.052 at Depth> 1.85" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 27 Summary for Subcatchment 10: D.A.10 Runoff = 0.55 cfs @ 12.00 hrs, Volume= 0.028 at Depth> 1.70" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 0.47 cfs @ 11.97 hrs, Volume= 0.021 at Depth> 2.02" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 2.51 cfs @ 12.02 hrs, Volume= 0.137 at Depth> 2.53" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 10yr Rainfall=5.54" 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 28 Tc Length Description 10.3 Direct Entry, Summary for Pond 3P: FOREBAY#1 Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 1.25" for 10yr event Inflow = 7.35 cfs @ 12.09 hrs, Volume= 0.539 of Outflow = 7.26 cfs@ 12.11 hrs, Volume= 0.538 af, Aden=1%n Lag= 1.1 min Primary = 7.26 cfs @ 12.11 hrs, Volume= 0.538 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 681.19'@ 12.11 hrs Surf.Area= 584 sf Storage= 448 cf Plug -Flow detention time=1.6 min calculated for 0.538 of (100% of inflow) Center -of -Mass det. time=1.0 min ( 886.8 - 885.8 ) Volume Invert Avail.Storage Storage Description #1 679.97' 3,308 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 679.97 20 0 0 680.00 163 3 3 682.00 868 1,031 1,034 684.00 1,406 2,274 3,308 Device Routing Invert Outlet Devices #1 Primary 679.97' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 679.97' / 679.47' S= 0.0123 ? Cc= 0.900 n= 0.013 Primary OutFlow, Max=7.26 cfs@ 12.11 hrs HW=681.19' (Free Discharge) L1=Culvert (Barrel Controls 7.26 cfs @ 5.16 fps) Summary for Pond 4P: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious, Inflow Depth > 1.32" for 10yr event Inflow = 33.52 cfs@ 12.13 hrs, Volume= 2.682 of Outflow = 36.24 cfs @ 12.13 hrs, Volume= 2.671 af, Atten= 0%q Lag= 0.2 min Primary = 36.24 cfs@ 12.13 hrs, Volume= 2.671 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 686.60'@ 12.13 hrs Surf.Area= 2,909 sf Storage= 2,753 cf Plug -Flow detention time=4.8 min calculated for 2.671 of (100%of inflow) Center -of -Mass det. time=2.4 min ( 886.9 - 884.5 ) As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 10yr Rainfall=5.54" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 29 Volume Invert Avail.Storage Storage Description #1 683.97' 2,753 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 683.97 20 0 0 685.85 2,909 2,753 2,753 Device Routing Invert Outlet Devices #1 Primary 683.97' 36.0" Round Culvert L= 40.0' CPP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 683.97' / 679.47' S= 0.1125 ? Cc= 0.900 n= 0.011 Primary OutFlow Max=36.21 cfs@ 12.13 hrs HW=686.60' (Free Discharge) L1=Culvert (Inlet Controls 36.21 cfs @ 5.52 fps) Summary for Pond 5P: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious Inflow Depth > 1.31" for 10yr event Inflow = 47.68 cfs@ 12.13 hrs Volume= 3.646 of Outflow = 16.18 cfs @ 12.44 hrs, Volume= 3.067 af, Atten= 66% tag=18.8 min Primary = 16.18 cfs@ 12.44 hrs, Volume= 3.067 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 679.99'@ 12.44 hrs Surf.Area= 31,470 sf Storage= 45,842 cf Plug -Flow detention time=137.7 min calculated for 3.067 of (84% of inflow) Center -of -Mass det. time=65.1 min ( 951.1 - 886.1 ) Volume Invert Avail.Storage Storage Description #1 678.52' 135,184 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.52 30,705 0 0 682.77 32,911 135,184 135,184 Device Routing Invert Outlet Devices #1 Primary 668.77' 30.0" Round Culvert L= 85.5' Ke= 0.400 Inlet / Outlet Invert= 668.77' / 665.23' S= 0.0414'f Cc= 0.900 n= 0.013 #2 Device 1 678.52' 7.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 679.52' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 681.36' 15.4' long x 13.5' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.62 2.66 2.70 2.66 2.65 2.66 2.65 2.63 Primary OutFlow Max=16.17 cfs@ 12.44 hrs HW=679.99' (Free Discharge) 1=Culvert (Passes 16.17 cfs of 79.98 cfs potential flow) �2=Orifice/Grate (Orifice Controls 2.74 cfs @ 4.70 fps) 3=Riser (Weir Controls 13.43 cfs @ 2.25 fps) =Broad -Crested Rectangular Weir( Controls 0.00 cfs) As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr 25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 30 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>2.27" Tc=9.6 min CN=58 Runoff=1.02 cfs 0.055 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious RunoffDepth>1.99" Tc=18.0 min CN=55 Runoff=4.08 cfs 0.307 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>1.99" Tc=15.3 min CN=55 Runoff=12.48 cfs 0.854 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>2.08" Tc=18.2 min CN=56 Runoff=56.19 cfs 4.210 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious Runoff Depth>2.08" Tc=15.7 min CN=56 Runoff=2.16 cfs 0.148 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious Runoff Depth>2.27" Tc=5.0 min CN=58 Runoff=5.10 cfs 0.229 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>2.17" Tc=13.7 min CN=57 Runoff=2.69 cfs 0.171 of Subcatchment7:D.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>2.26" Tc=13.1 min CN=58 Runoff=1.01 cfs 0.063 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>2.84" Tc=9.3 min CN=64 Runoff=0.43 cfs 0.023 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>2.74" Tc=12.2 min CN=63 Runoff=1.32 cfs 0.077 of Subcatchmentl0:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>2.55" Tc=8.0 min CN=61 Runoff=0.84 cfs 0.042 of Subcatchmentll:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>2.94" Tc=5.1 min CN=65 Runoff=0.69 cfs 0.031 of Subcatchmentl2:D.A.12 Runoff Area=28,264sf 0.00%Impervious RunoffDepth>3.55" Tc=10.3 min CN=71 Runoff=3.52 cfs 0.192 of Pond 3P: FOREBAY#1 Peak Elev=681.69' Storage=781 cf Inflow=12.48 cfs 0.854 of 24.0" Round Culvert n=0.013 L=40.6' 5=0.0123 7 Outflow=12.28 cfs 0.853 of Pond 4P: FOREBAY#2 Peak Elev=688.27' Storage=2,753 cf Inflow=56.19 cfs 4.210 of 36.0" Round Culvert n=0.011 L=40.0' 5=0.1125 ? Outflow=56.96 cfs 4.197 of Pond 5P: Level 2 Wet Pond Peak Elev=680.50' Storage=61,841 cf Inflow=76.52 cfs 5.735 of Outflow=43.33 cfs 5.049 of As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr 25yr RainfalF6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 31 Total Runoff Area = 36.394 ac Runoff Volume = 6.402 of Average Runoff Depth = 2.11" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 32 Summary for Subcatchment 1: D.AA Runoff = 1.02 cfs @ 12.02 hrs, Volume= 0.055 at Depth> 2.27" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 4.08 cfs @ 12.12 hrs, Volume= 0.307 at Depth> 1.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 12.48 cfs@ 12.09 hrs, Volume= 0.854 at Depth> 1.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 33 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 56.19 cfs@ 12.12 hm Volume= 4.210 at Depth> 2.08" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 2.16 cfs @ 12.09 hrs, Volume= 0.148 at Depth> 2.08" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 34 Summary for Subcatchment 5A: POND DA Runoff = 5.10 cfs @ 11.97 hrs, Volume= 0.229 at Depth> 2.27" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 2.69 cfs @ 12.07 hrs, Volume= 0.171 at Depth> 2.17" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 1.01 cfs @ 12.06 hrs, Volume= 0.063 at Depth> 2.26" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 35 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.43 cfs @ 12.01 hrs, Volume= 0.023 at Depth> 2.84" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 1.32 cfs @ 12.05 hrs, Volume= 0.077 at Depth> 2.74" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 36 Summary for Subcatchment 10: D.A.10 Runoff = 0.84 cfs @ 12.00 hrs, Volume= 0.042 at Depth> 2.55" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 25yr Rainfall=6.80" 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 0.69 cfs @ 11.97 hrs, Volume= 0.031 at Depth> 2.94" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 3.52 cfs @ 12.02 hrs, Volume= 0.192 at Depth> 3.55" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 25yr Rainfall=6.80" 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 37 Tc Length Description 10.3 Direct Entry, Summary for Pond 3P: F0REBAY#1 Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 1.99" for 25yr event Inflow = 12.48 cfs@ 12.09 hrs, Volume= 0.854 of Outflow = 12.28 cfs@ 12.11 hrs, Volume= 0.853 af, Atten= 2% Lag= 1.1 min Primary = 12.28 cfs@ 12.11 hrs, Volume= 0.853 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 681.69'@ 12.11 hrs Surf.Area= 759 sf Storage= 781 cf Plug -Flow detention time=1.4 min calculated for 0.853 of (100% of inflow) Center -of -Mass det. time=0.9 min ( 871.2 - 870.3 ) Volume Invert Avail.Storage Storage Description #1 679.97' 3,308 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 679.97 20 0 0 680.00 163 3 3 682.00 868 1,031 1,034 684.00 1,406 2,274 3,308 Device Routing Invert Outlet Devices #1 Primary 679.97' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 679.97' / 679.47' S= 0.0123'f Cc= 0.900 n= 0.013 Primary OutFlow Max=12.27 cfs@ 12.11 hrs HW=681.69' (Free Discharge) L1=Culvert (Barrel Controls 12.27 cfs @ 5.73 fps) Summary for Pond 4P: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious, Inflow Depth > 2.08" for 25yr event Inflow = 56.19 cfs@ 12.12 hrs, Volume= 4.210 of Outflow = 56.96 cfs@ 12.11 hrs, Volume= 4.197 at Atten= 09/c, Lag= 0.0 min Primary = 56.96 cfs@ 12.11 hrs, Volume= 4.197 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 688.27'@ 12.11 hrs Surf.Area= 2,909 sf Storage= 2,753 cf Plug -Flow detention time=3.7 min calculated for 4.195 of (100%of inflow) Center -of -Mass det. time=1.9 min ( 871.6 - 869.7 ) As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 25yr Rainfall=6.80" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 38 Volume Invert Avail.Storage Storage Description #1 683.97' 2,753 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 683.97 20 0 0 685.85 2,909 2,753 2,753 Device Routing Invert Outlet Devices #1 Primary 683.97' 36.0" Round Culvert L= 40.0' CPP, end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 683.97' / 679.47' S= 0.1125 ? Cc= 0.900 n= 0.011 Primary OutFlow Max=56.79 cfs@ 12.11 hrs HW=688.25' (Free Discharge) L1=Culvert (Inlet Controls 56.79 cfs @ 8.03 fps) Summary for Pond 5P: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious, Inflow Depth > 2.06" for 25yr event Inflow = 76.52 cfs@ 12.11 hrs, Volume= 5.735 of Outflow = 43.33 cfs@ 12.28 hrs, Volume= 5.049 af, Atten= 43% Lag=10.3 min Primary = 43.33 cfs@ 12.28 hrs, Volume= 5.049 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 680.50'@ 12.28 hrs Surf.Area= 31,733 sf Storage= 61,841 cf Plug -Flow detention time=94.6 min calculated for 5.049 of (88% of inflow) Center -of -Mass det. time=36.9 min ( 907.7 - 870.8 ) Volume Invert Avail.Storage Storage Description #1 678.52' 135,184 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.52 30,705 0 0 682.77 32,911 135,184 135,184 Device Routing Invert Outlet Devices #1 Primary 668.77' 30.0" Round Culvert L= 85.5' Ke= 0.400 Inlet / Outlet Invert= 668.77' / 665.23' S= 0.0414'f Cc= 0.900 n= 0.013 #2 Device 1 678.52' 7.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 679.52' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 681.36' 15.4' long x 13.5' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.62 2.66 2.70 2.66 2.65 2.66 2.65 2.63 Primary OutFlow Max=43.31 cfs@ 12.28 hrs HW=680.50' (Free Discharge) 1=Culvert (Passes 43.31 cfs of 81.98 cfs potential flow) �2=Orifice/Grate (Orifice Controls 3.40 cfs @ 5.83 fps) 3=Riser (Weir Controls 39.91 cfs @ 3.24 fps) =Broad -Crested Rectangular Weir ( Controls 0.00 cfs) As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr 100yr Rainfall=9.07" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 39 Time span=0.00-24.00 hrs, dt=0.01 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl:D.A.1 Runoff Area=12,664sf 0.00%Impervious Runoff Depth>3.90" Tc=9.6 min CN=58 Runoff=1.78 cfs 0.094 of Subcatchment2:D.A.2 Runoff Area=80,750sf 0.00%Impervious Runoff Depth>3.52" Tc=18.0 min CN=55 Runoff=7.58 cfs 0.544 of Subcatchment3: D.A.3 Runoff Area=224,631 sf 0.00%Impervious Runoff Depth>3.52" Tc=15.3 min CN=55 Runoff=23.06 cfs 1.513 of Subcatchment4:D.A.4 Runoff Area=1,060,229sf 0.00%Impervious Runoff Depth>3.64" Tc=18.2 min CN=56 Runoff=102.93 cfs 7.386 of Subcatchment5:D.A.5 Runoff Area=37,359sf 0.00%Impervious RunoffDepth>3.64" Tc=15.7 min CN=56 Runoff=3.93 cfs 0.260 of Subcatchment5A: POND DA Runoff Area=52,767sf 0.00%Impervious RunoffDepth>3.90" Tc=5.0 min CN=58 Runoff=8.82 cfs 0.394 of Subcatchment6:D.A.6 Runoff Area=41,146sf 0.00%Impervious Runoff Depth>3.77" Tc=13.7 min CN=57 Runoff=4.80 cfs 0.297 of Subcatchment7:D.A.7 Runoff Area=14,442sf 0.00%Impervious Runoff Depth>3.89" Tc=13.1 min CN=58 Runoff=1.78 cfs 0.108 of Subcatchment8: D.A.8 Runoff Area=4,207sf 0.00%Impervious Runoff Depth>4.64" Tc=9.3 min CN=64 Runoff=0.71 cfs 0.037 of Subcatchment9:D.A.9 Runoff Area=14,710sf 0.00%Impervious Runoff Depth>4.51" Tc=12.2 min CN=63 Runoff=2.18 cfs 0.127 of SubcatchmentlO:D.A.10 Runoff Area=8,698sf 0.00%Impervious Runoff Depth>4.27" Tc=8.0 min CN=61 Runoff=1.42 cfs 0.071 of Subcatchmentll:D.A.11 Runoff Area=5,459sf 0.00%Impervious Runoff Depth>4.77" Tc=5.1 min CN=65 Runoff=1.10 cfs 0.050 of Subcatchmentl2:D.A.12 Runoff Area=28,264sf 0.00%Impervious Runoff Depth>5.51" Tc=10.3 min CN=71 Runoff=5.41 cfs 0.298 of Pond 3P: FOREBAY#1 Peak Elev=682.92' Storage=1,941 cf Inflow=23.06 cfs 1.513 of 24.0" Round Culvert n=0.013 L=40.6' S=0.0123'P Outflow=21.96 cfs 1.512 of Pond 4P: FOREBAY#2 Peak Elev=694.96' Storage=2,753 cf Inflow=102.93 cfs 7.386 of 36.0" Round Culvert n=0.011 L=40.0' S=0.1125 7 Outflow=104.84 cfs 7.369 of Pond 5P: Level 2 Wet Pond Peak Elev=681.58' Storage=96,248 cf Inflow=139.83 cfs 10.079 of Outflow=90.14 cis 9.329 of As -Built Pants Project Culvert Post -Development AS -BUILT REV Type 1124-hr 100yr Rainfall=9.07" Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 40 Total Runoff Area = 36.394 ac Runoff Volume=11.179 of Average Runoff Depth = 3.69" 100.00% Pervious = 36.394 ac 0.00% Impervious = 0.000 ac As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 41 Summary for Subcatchment 1: D.AA Runoff = 1.78 cfs @ 12.02 hrs, Volume= 0.094 at Depth> 3.90" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' 10,635 55 Woods, Good, HSG B 1,226 85 Gravel roads, HSG B 803 61 >75%Grass cover. Good. HSG B 12,664 58 Weighted Average 12,664 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 9.6 Direct Entry, Summary for Subcatchment 2: D.A.2 Runoff = 7.58 cfs @ 12.11 hrs, Volume= 0.544 at Depth> 3.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 78,953 55 Woods, Good, HSG B 829 85 Gravel roads, HSG B 968 61 >75% Grass cover. Good. HSG B 80,750 55 Weighted Average 80,750 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 18.0 Direct Entry, Summary for Subcatchment 3: D.A.3 Runoff = 23.06 cfs@ 12.08 hrs, Volume= 1.513 at Depth> 3.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 100yr Rainfall=9.07' As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr f00yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 42 221,242 55 Woods, Good, HSG B 1,545 85 Gravel roads, HSG B 1,844 61 >75%Grass cover, Good, HSG B 224,631 55 Weighted Average 224,631 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.3 Direct Entry, Summary for Subcatchment 4: D.A.4 Runoff = 102.93 cfs@ 12.11 hrs, Volume= 7.386 at Depth> 3.64" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 995,292 55 Woods, Good, HSG B 11,644 85 Gravel roads, HSG B 53.293 61 >75%Grass cover. Good. HSG B 1,060,229 56 Weighted Average 1,060,229 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 18.2 Direct Entry, Summary for Subcatchment 5: D.A.5 Runoff = 3.93 cfs @ 12.09 hrs, Volume= 0.260 at Depth> 3.64" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sfl CN 35,036 55 Woods, Good, HSG B 1,060 85 Gravel roads, HSG B 1.263 61 >75%Grass cover. Good. HSG B 37,359 56 Weighted Average 37,359 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 15.7 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 43 Summary for Subcatchment 5A: POND DA Runoff = 8.82 cfs @ 11.96 hrs, Volume= 0.394 at Depth> 3.90" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' 39,396 55 Woods, Good, HSG B 3,650 85 Gravel roads, HSG B 9.721 61 >75%Grass cover. Good. HSG B 52,767 58 Weighted Average 52,767 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 6: D.A.6 Runoff = 4.80 cfs @ 12.06 hrs, Volume= 0.297 at Depth> 3.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 37,932 55 Woods, Good, HSG B 1,980 85 Gravel roads, HSG B 1.234 61 >75% Grass cover. Good. HSG B 41,146 57 Weighted Average 41.146 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.7 Direct Entry, Summary for Subcatchment 7: D.A.7 Runoff = 1.78 cfs @ 12.05 hrs, Volume= 0.108 at Depth> 3.89" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type 11 24-hr 100yr Rainfall=9.07' As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 44 11,732 55 Woods, Good, HSG B 1,007 85 Gravel roads, HSG B 1,703 61 >75%Grass cover, Good, HSG B 14,442 58 Weighted Average 14,442 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 13.1 Direct Entry, Summary for Subcatchment 8: D.A.8 Runoff = 0.71 cfs@ 12.01 hrs, Volume= 0.037 at Depth> 4.64" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 2,082 55 Woods, Good, HSG B 983 85 Gravel roads, HSG B 1.142 61 >75%Grass cover. Good. HSG B 4,207 64 Weighted Average 4,207 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft(sec) (cfs) 9.3 Direct Entry, Summary for Subcatchment 9: D.A.9 Runoff = 2.18 cfs @ 12.04 hrs, Volume= 0.127 at Depth> 4.51" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sfl CN 6,982 55 Woods, Good, HSG B 2,796 85 Gravel roads, HSG B 4.932 61 >75%Grass cover. Good. HSG B 14,710 63 Weighted Average 14,710 100.00% Pervious Area Tc Length Slope Velocity Capacity Description 12.2 Direct Entry, As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 45 Summary for Subcatchment 10: D.A.10 Runoff = 1.42 cfs @ 12.00 hrs, Volume= 0.071 at Depth> 4.27" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' 5,699 55 Woods, Good, HSG B 1,258 85 Gravel roads, HSG B 1,741 61 >75%Grass cover, Good, HSG B 8,698 61 Weighted Average 8,698 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Summary for Subcatchment 11: D.A.11 Runoff = 1.10 cfs @ 11.96 hrs, Volume= 0.050 at Depth> 4.77" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' Area (sf) CN Description 1,882 55 Woods, Good, HSG B 1,443 85 Gravel roads, HSG B 2.134 61 >75% Grass cover. Good. HSG B 5,459 65 Weighted Average 5,459 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.1 Direct Entry, Summary for Subcatchment 12: D.A.12 Runoff = 5.41 cfs @ 12.02 hrs, Volume= 0.298 at Depth> 5.51" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr Rainfall=9.07' 11,939 85 Gravel roads, HSG B 16,325 61 >75%Grass cover, Good, HSG B 28,264 71 Weighted Average 28,264 100.00% Pervious Area As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD® 9.10 s/n 07054 © 2010 HydroCAD Software Solutions LLC Page 46 Tc Length Description 10.3 Direct Entry, Summary for Pond 3P: F0REBAY#1 Inflow Area = 5.157 aq 0.00%Impervious, Inflow Depth > 3.52" for 100yr event Inflow = 23.06 cfs@ 12.08 hrs, Volume= 1.513 of Outflow = 21.96 cfs@ 12.12 hrs, Volume= 1.512 af, Atten= 5°/q Lag= 2.1 min Primary = 21.96 cfs@ 12.12 hrs, Volume= 1.512 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 682.92'@ 12.12 hrs Surf.Area=1,114 sf Storage=1,941 cf Plug -Flow detention time=1.4 min calculated for 1.512 of (100%of inflow) Center -of -Mass det. time=1.0 min ( 853.9 - 852.9 ) Volume Invert Avail.Storage Storage Description #1 679.97' 3,308 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 679.97 20 0 0 680.00 163 3 3 682.00 868 1,031 1,034 684.00 1,406 2,274 3,308 Device Routing Invert Outlet Devices #1 Primary 679.97' 24.0" Round Culvert L= 40.6' Ke= 0.400 Inlet / Outlet Invert= 679.97' / 679.47' S= 0.0123 ? Cc= 0.900 n= 0.013 Primary OutFlow Max=21.95 cfs@ 12.12 hrs HW=682.91' (Free Discharge) L1=Culvert (Barrel Controls 21.95 cfs @ 6.99 fps) Summary for Pond 4P: FOREBAY#2 Inflow Area = 24.340 aq 0.00%Impervious Inflow Depth > 3.64" for 100yr event Inflow = 102.93 cfs@ 12.11 hrs Volume= 7.386 of Outflow = 104.84 cfs@ 12.12 hrs, Volume= 7.369 af, Atten= 0%n Lag= 0.4 min Primary = 104.84 cfs@ 12.12 hrs, Volume= 7.369 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 694.96'@ 12.12 hrs Surf.Area= 2,909 sf Storage= 2,753 cf Plug -Flow detention time=2.8 min calculated for 7.369 of (100%of inflow) Center -of -Mass det. time=1.4 min ( 854.3 - 852.9 ) As -Built Pants Project Culvert Post -Development AS -BUILT REV Type // 24-hr 100yr RainfalP 9.0 7' Prepared by Shimp Engineering Printed 10/28/2020 HydroCAD@ 9.10 s/n 07054 @ 2010 HydroCAD Software Solutions LLC Page 47 Volume Invert Avail.Storage Storage Description #1 683.97' 2,753 cf Custom Stage Data (Prismatic)Listed below Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 683.97 20 0 0 685.85 2,909 2,753 2,753 Device Routing Invert Outlet Devices #1 Primary 683.97' 36.0" Round Culvert L= 40.0' CPR end -section conforming to fill, Ke= 0.500 Inlet / Outlet Invert= 683.97' / 679.47' S= 0.1125 ? Cc= 0.900 n= 0.011 Primary OutFlow Max=104.60 cis@ 12.12 hrs HW=694.92' (Free Discharge) L1=Culvert (Inlet Controls 104.60 cfs @ 14.80 fps) Summary for Pond 5P: Level 2 Wet Pond Inflow Area = 33.419 aq 0.00%Impervious, Inflow Depth > 3.62" for 100yr event Inflow = 139.83 cfs@ 12.12 hrs, Volume= 10.079 of Outflow = 90.14 cfs@ 12.25 hrs, Volume= 9.329 af, Atten= 36% Lag= 7.8 min Primary = 90.14 cfs@ 12.25 hrs, Volume= 9.329 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Peak Elev= 681.58'@ 12.25 hrs Surf.Area= 32,291 sf Storage= 96,248 cf Plug -Flow detention time=61.8 min calculated for 9.329 of (93%of inflow) Center -of -Mass det. time=22.9 min ( 876.5 - 853.6 ) Volume Invert Avail.Storage Storage Description #1 678.52' 135,184 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 678.52 30,705 0 0 682.77 32,911 135,184 135,184 Device Routing Invert Outlet Devices #1 Primary 668.77' 30.0" Round Culvert L= 85.5' Ke= 0.400 Inlet / Outlet Invert= 668.77' / 665.23' S= 0.0414'f Cc= 0.900 n= 0.013 #2 Device 1 678.52' 7.0" W x 12.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 679.52' 48.0" Horiz. Riser C= 0.600 Limited to weir flow at low heads #4 Primary 681.36' 15.4' long x 13.5' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.62 2.66 2.70 2.66 2.65 2.66 2.65 2.63 Primary OutFlow Max=90.13 cfs@ 12.25 hrs HW=681.58' (Free Discharge) =Culvert (Inlet Controls 86.08 cfs @ 17.54 fps) h2=Orifice/Grate (Passes <4.48 cfs potential flow) 3=Riser (Passes < 86.75 cfs potential flow) =Broad -Crested Rectangular Weir (Weir Controls 4.04 cfs @ 1.22 fps)