Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
WPO201800051 Calculations WPO VSMP 2018-12-20
VIRGINIA STORMWATER MANAGMENT PLAN REPORT FOR BROOKHILL WPO201800051 Section 1 , Blocks 4A and 4B Apartments POI 11 2571 &2575 Seminole Trail Charlottesville,Albemarle County,VA BY BOH LER ENGINEERING 28 Blackwell Park Lane Suite 201 Warrenton,VA 20186 0��1,1E�TFI 0 BE#V15200049t- O CR�S�i. December 18,2018 v LI No. 0402056625 YAUGER 0402056625 �. �� W ie/ ww4, S?°AIA L EA-� Ryan T Yauger,P.E. Seal Project Manager APPROVED by the Albemarle County Community D velo ment Department Date I o2��j File winooI coda TABLE OF CONTENTS Watershed Model Schematic 1 Hydrograph Reports 2-48 1 Watershed Model Schematic Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 3 ` • � 6 117 Legend Hyd. Origin Description 1 SCS Runoff DA11 -UNDETAINED 2 SCS Runoff ROW AND 48-5(POND11) 3 SCS Runoff BLOCK 8A AND 4A-2(POND 11) 4 SCS Runoff 4A-1 (POND 11) 5 Reservoir DP-4A 6 Combine <no description> 7 Reservoir Pond 11 8 Combine <no description> 9 Reservoir Level Spreader 10 SCS Runoff Pre DA to POI-11 Project: Storm Routings Pond 11 (Road and 4A).gpw Monday, 09/24/2018 2 Hydrograph Summary Report" ydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph No. type flow interval Peak volume hyd(s) elevation strge used Description (origin) (cfs) (min) (min) (cult) (ft) (cuft) 1 SCS Runoff 3.697 2 750 32,719 — -- — DA11-UNDETAINED 2 SCS Runoff 11.91 2 716 24,158 — — — ROW AND 4B-5(POND11) 3 SCS Runoff 1.609 2 726 7,863 — — — BLOCK 8A AND 4A-2(POND 11) 4 SCS Runoff 15.71 2 716 31,959 — — — 4A-1 (POND 11) 5 Reservoir 3.056 2 726 31,448 4 432.81 11,496 DP-4A 6 Combine 15.19 2 718 63,469 2,3,5 — — <no description> 7 Reservoir 1.078 2 888 63,432 6 400.81 85,373 Pond 11 8 Combine 4.579 2 750 96,152 1,7 — — <no description> 9 Reservoir 4.580 2 752 95,495 8 348.69 780 Level Spreader 10 SCS Runoff 10.15 2 728 52,959 — — — Pre DA to POI-11 Storm Routings Pond 11 (Road and 4A).gpw Return Period: 1 Year Monday, 09/24/2018 3 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 1 DA11 - UNDETAINED Hydrograph type = SCS Runoff Peak discharge = 3.697 cfs Storm frequency = 1 yrs Time to peak = 750 min Time interval = 2 min Hyd. volume = 32,719 cuft Drainage area = 19.080 ac Curve number = 64* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 52.00 min Total precip. = 3.00 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(1.910 x 89)+(11.240 x 53)+(2.720 x 84)+(0.610 x 61)+(2.150 x 73)+(0.450 x 61)J/19.080 DA11 - UNDETAINED Q (cfs) Hyd. No. 1 -- 1 Year Q (cfs) 4.00 4.00 3.00 3.00 2.00 - 2.00 I 1.00 1.00 0.00 - - - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 1 Time (min) 4 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 2 ROW AND 4B-5 (POND11) Hydrograph type = SCS Runoff Peak discharge = 11.91 cfs Storm frequency = 1 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 24,158 cuft Drainage area = 4.270 ac Curve number = 86* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 3.00 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Composite(Area/CN)=[(3.740 x 89)+(0.530 x 67)]/4.270 ROW AND 4B-5 (POND11) Q (cfs) Hyd. No. 2-- 1 Year Q (cfs) 12.00 12.00 10.00 10.00 8.00 8.00 6.00 6.00 4.00 4.00 2.00 2.00 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 Hyd No. 2 Time(min) 5 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 3 BLOCK 8A AND 4A-2 (POND 11) Hydrograph type = SCS Runoff Peak discharge = 1.609 cfs Storm frequency = 1 yrs Time to peak = 726 min Time interval = 2 min Hyd. volume = 7,863 cuft Drainage area = 6.670 ac Curve number = 60* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 15.70 min Total precip. = 3.00 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(4.770 x 58)+(1.900 x 65)]/6.670 BLOCK 8A AND 4A-2 (POND 11) Q (cfs) Q (cfs) Hyd. No. 3-- 1 Year 2.00 2.00 1.00 - 1.00 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 3 Time (min) 6 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 4 4A-1 (POND 11) Hydrograph type = SCS Runoff Peak discharge = 15.71 cfs Storm frequency = 1 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 31,959 cuft Drainage area = 5.400 ac Curve number = 87* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 3.00 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(5.400 x 87)]/5.400 4A-1 (POND 11) Q (cfs) Hyd. No. 4-- 1 Year Q (cfs) 18.00 18.00 15.00 15.00 12.00 12.00 9.00 9.00 6.00 6.00 3.00 3.00 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 Hyd No. 4 Time (min) 7 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 5 DP-4A Hydrograph type = Reservoir Peak discharge = 3.056 cfs Storm frequency = 1 yrs Time to peak = 726 min Time interval = 2 min Hyd. volume = 31,448 cuft Inflow hyd. No. = 4 - 4A-1 (POND 11) Max. Elevation = 432.81 ft Reservoir name = DP-4A Max. Storage = 11,496 cuft Storage Indication method used. DP-4A Q (cfs) Hyd. No. 5 -- 1 Year Q (cfs) 18.00 18.00 15.00 15.00 12.00 12.00 9.00 9.00 6.00 6.00 3.00 - 3.00 0.00 - .�. �- . . w 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hyd No. 5 Hyd No. 4 II I l I . i Total storage used = 11,496 cuft Pond Report 8 Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday,09/24/2018 Pond No. 6 - DP-4A Pond Data UG Chambers-Invert elev.=423.50 ft, Rise x Span=5.00 x 5.00 ft, Barrel Len=60.00 ft, No.Barrels=3, Slope=0.00%, Headers=No EooisersebtArrekr6 cer>I422/50dpsVOdttic3i6ee tiAedjfdr-A/dlQB18,cNoutatkx4SHffi,�ibing Elevation=430.00 ft Stage/Storage Table Stage(ft) Elevation(ft) Contour area(sqft) Incr.Storage(cuft) Total storage(cuft) 0.00 422.50 n/a 0 0 0.70 423.20 n/a 340 340 1.40 423.90 n/a 413 754 2.10 424.60 n/a 584 1,338 2.80 425.30 n/a 653 1,991 3.50 426.00 n/a 682 2,674 4.20 426.70 n/a 682 3.356 4.90 427.40 n/a 653 4,009 5.60 428.10 n/a 584 4,594 6.30 428.80 n/a 413 5,007 7.00 429.50 n/a 340 5,347 7.50 430.00 367 61 5,408 8.50 431.00 1,532 883 6,291 9.50 432.00 3,152 2,294 8,585 10.50 433.00 4,126 3,628 12,212 11.50 434.00 5,158 4,632 16,844 12.50 435.00 6,254 5,697 22,541 13.50 436.00 7,226 6,733 29,274 14.50 437.00 8,355 7,783 37,057 Culvert/Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise(in) = 24.00 6.00 9.00 0.00 Crest Len (ft) = 20.00 Inactive Inactive 0.00 Span(in) = 24.00 6.00 30.00 0.00 Crest El.(ft) = 434.25 434.00 432.75 0.00 No.Barrels = 1 1 2 0 Weir Coeff. = 3.33 3.33 3.33 3.33 Invert El.(ft) = 422.00 423.50 432.75 0.00 Weir Type = 1 Rect Rect -- Length(ft) = 63.90 0.00 0.00 0.00 Multi-Stage = Yes Yes Yes No Slope(%) = 1.00 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfil.(in/hr) = 0.000(by Wet area) Multi-Stage = n/a Yes Yes No TW Elev.(ft) = 0.00 Note.Culvert/Orifice outflows are analyzed under inlet(ic)and outlet(oc)control. Weir nsers checked for onfice conditions(ic)and submergence(s). Stage(ft) Stage/Discharge Elev(ft) 15.00 437.50 I/ 12.00 434.50 9.00 431.50 6.00 428.50 3.00 425.50 0.00 - 422.50 0.00 6.00 12.00 18.00 24.00 30.00 36.00 42.00 48.00 54.00 60.00 Total Q Discharge(cfs) 9 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 6 <no description> Hydrograph type = Combine Peak discharge = 15.19 cfs Storm frequency = 1 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 63,469 cuft Inflow hyds. = 2, 3, 5 Contrib. drain. area = 10.940 ac <no description> Q (cfs) Hyd. No. 6-- 1 Year Q (cfs) 18.00 18.00 15.00 15.00 12.00 12.00 9.00 9.00 6.00 - 6.00 3.00 - 3.00 I 1111164....—hS1111. 1. 11- 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hyd No. 6 Hyd No. 2 Hyd No. 3 Hyd No. 5 10 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday, 09/24/2018 Hyd. No. 7 Pond 11 Hydrograph type = Reservoir Peak discharge = 1.078 cfs Storm frequency = 1 yrs Time to peak = 888 min Time interval = 2 min Hyd. volume = 63,432 cuft Inflow hyd. No. = 6 - <no description> Max. Elevation = 400.81 ft Reservoir name = Pond 11 Max. Storage = 85,373 cuft Storage Indication method used. Wet pond routing start elevation=399.00 ft. Pond 11 Q(ems) Hyd. No. 7-- 1 Year Q (cfs) 18.00 18.00 15.00 - 15.00 12.00 12.00 9.00 9.00 6.00 6.00 3.00 - -- 3.00 0.00 - 0.00 0 360 720 1080 1440 1800 2160 2520 2880 3240 Time (min) Hyd No. 7 Hyd No. 6 II 1 1 1 I I C Total storage used = 85,373 cuft Pond Report 11 Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Pond No. 1 - Pond 11 Pond Data Contours-User-defined contour areas.Average end area method used for volume calculation.Begining Elevation=389.00 ft Stage I Storage Table Stage(ft) Elevation(ft) Contour area(sqft) Incr.Storage(cuft) Total storage(cuft) 0.00 389.00 645 0 0 1.00 390.00 1,111 878 878 2.00 391.00 1,699 1,405 2,283 3.00 392.00 2,417 2,058 4,341 4.00 393.00 3,257 2,837 7,178 5.00 394.00 4,229 3,743 10,921 6.00 395.00 5,320 4,775 15,696 7.00 396.00 6,547 5,934 21,629 8.00 397.00 7,905 7,226 28,855 9.00 398.00 9,596 8,751 37,606 10.00 399.00 14,542 12,069 49,675 11.00 400.00 20,724 17,633 67,308 12.00 401.00 23,709 22,217 89,524 13.00 402.00 27,957 25,833 115,357 14.00 403.00 31,403 29,680 145,037 15.00 404.00 34,584 32,994 178,031 Culvert/Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise(in) = 60.00 4.00 6.00 0.00 Crest Len(ft) = 32.00 16.00 20.00 0.00 Span(in) = 60.00 4.00 6.00 0.00 Crest El.(ft) = 402.75 401.50 403.25 0.00 No.Barrels = 1 2 1 0 Weir Coeff. = 3.33 3.33 2.60 3.33 Invert El.(ft) = 389.00 399.00 401.00 0.00 Weir Type = 1 Rect Broad - Length(ft) = 50.00 0.00 0.00 0.00 Multi-Stage = Yes Yes Yes No Slope(%) = 1.50 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfil.(in/hr) = 0.000(by Contour) Multi-Stage = n/a Yes Yes No TW Elev.(ft) = 0.00 Note Culvert/Onfice outflows are analyzed under inlet(lc)and outlet(oc)control. Weir users checked for ont/ce conditions(ic)and submergence(s). Stage(ft) Stage/Discharge Elev(ft) 15.00 _ 404.00 12.00 r"-......-.."°""w401.00 9.00 398.00 6.00 395.00 3.00 392.00 0.00 389.00 0.0 30.0 60.0 90.0 120.0 150.0 180.0 210.0 240.0 270.0 300.0 330.0 Total Q Discharge(cfs) 12 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday, 09/24/2018 Hyd. No. 8 <no description> Hydrograph type = Combine Peak discharge = 4.579 cfs Storm frequency = 1 yrs Time to peak = 750 min Time interval = 2 min Hyd. volume = 96,152 cult Inflow hyds. = 1, 7 Contrib. drain. area = 19.080 ac <no description> Q (cfs) Hyd. No. 8-- 1 Year Q (cfs) 5.00 5.00 4.00 - 4.00 3.00 3.00 2.00 - 2.00 1.00 1.00 0.00 - '.- 0.00 0 240 480 720 960 1200 1440 1680 1920 2160 2400 Time (min) ----- Hyd No. 8 Hyd No. 1 Hyd No. 7 13 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday, 09/24/2018 Hyd. No. 9 Level Spreader Hydrograph type = Reservoir Peak discharge = 4.580 cfs Storm frequency = 1 yrs Time to peak = 752 min Time interval = 2 min Hyd. volume = 95,495 cuft Inflow hyd. No. = 8 - <no description> Max. Elevation = 348.69 ft Reservoir name = Level Spreader Max. Storage = 780 cult Storage Indication method used. Level Spreader Q (cfs) Hyd. No. 9-- 1 Year Q (cfs) 5.00 5.00 4.00 4.00 3.00 3.00 I 2.00 _ 2.00 1.00 1.00 0.00 — 0.00 0 240 480 720 960 1200 1440 1680 1920 2160 2400 Time (min) - Hyd No. 9 Hyd No. 8 ff I I I I I T Total storage used =780 cuft Pond Report 14 Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Pond No. 5 - Level Spreader Pond Data Contours-User-defined contour areas.Conic method used for volume calculation.Begining Elevation=347.00 ft Stage/Storage Table Stage(ft) Elevation(ft) Contour area(sqft) Incr.Storage(cuft) Total storage(cuft) 0.00 347.00 157 0 0 100 348.00 610 359 359 2.63 348.00 610 994 1,353 4.00 351.00 2,000 1.696 3,049 Culvert/Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise(in) = 0.00 0.00 0.00 0.00 Crest Len(ft) = 64.00 0.00 0.00 0.00 Span(in) = 0.00 0.00 0.00 0.00 Crest El.(ft) = 348.63 0.00 0.00 0.00 No.Barrels = 0 0 0 0 Weir Coeff. = 3.33 3.33 3.33 3.33 Invert El.(ft) = 0.00 0.00 0.00 0.00 Weir Type = Rect --- -- -- Length(ft) = 0.00 0.00 0.00 0.00 Multi-Stage = No No No No Slope(%) = 0.00 0.00 0.00 n/a N-Value = .013 .013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0.60 Exfil.(in/hr) = 0.000(by Wet area) Multi-Stage = n/a No No No TW Elev.(ft) = 0.00 Note Culvert/Onfice outflows are analyzed under inlet tici and outlet(oc)control. Weir nsers checked for orifice conditions(ic)and submergence(s). Stage(ft) Stage/Discharge Elev(ft) 4.00 - 351.00 3.00 350.00 2.00 349.00 1.00 348.00 0.00 347.00 0.0 80.0 160.0 240.0 320.0 400.0 480.0 560.0 640.0 720.0 800.0 Total Q Discharge(cfs) 15 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday, 09/24/2018 Hyd. No. 10 Pre DAto POI - 11 Hydrograph type = SCS Runoff Peak discharge = 10.15 cfs Storm frequency = 1 yrs Time to peak = 728 min Time interval = 2 min Hyd. volume = 52,959 cult Drainage area = 39.960 ac Curve number = 61* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 19.50 min Total precip. = 3.00 in Distribution = Type 11 Storm duration = 24 hrs Shape factor = 484 Composite(Area/CN)=[(16.740 x 63)+(17.880 x 60)+(5.340 x 60)]/39.960 Pre DAto POI - 11 Q (cfs) Hyd. No. 10-- 1 Year Q (cfs) 12.00 12.00 10.00 I 10.00 8.00 8.00 6.00 6.00 4.00 4.00 2.00 2.00 0.00 - — 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 10 Time (min) 16 Hydrograph Summary Report . ydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph No. type flow interval Peak volume hyd(s) elevation strge used Description (origin) (cfs) (min) (min) (cuft) (ft) (cuft) 1 SCS Runoff 7.066 2 748 53,509 ---- ---- ---- DA11 -UNDETAINED 2 SCS Runoff 15.67 2 716 32,040 ---- ----- --- ROW AND 4B-5(POND11) 3 SCS Runoff 3.712 2 724 13,784 ---- ----- BLOCK 8A AND 4A-2(POND 11) 4 SCS Runoff 20.50 2 716 42,094 ----- ---- 4A-1 (POND 11) 5 Reservoir 10.53 2 722 41,583 4 433.34 13,755 DP-4A 6 Combine 24.04 2 720 87,407 2,3,5 ---- ----- <no description> 7 Reservoir 1.596 2 884 87,370 6 401.39 99,505 Pond 11 8 Combine 8.148 2 748 140,879 1,7 -- <no description> 9 Reservoir 8.145 2 748 140,222 8 348.73 802 Level Spreader 10 SCS Runoff 22.13 2 726 91,033 -- --- -- Pre DA to POI-11 Storm Routings Pond 11 (Road and 4A).gpw Return Period: 2 Year Monday, 09/24/2018 17 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk.Inc.v2020 Monday, 09/24/2018 Hyd. No. 1 DA11 - UNDETAINED Hydrograph type = SCS Runoff Peak discharge = 7.066 cfs Storm frequency = 2 yrs Time to peak = 748 min Time interval = 2 min Hyd. volume = 53,509 cult Drainage area = 19.080 ac Curve number = 64* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 52.00 min Total precip. = 3.62 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(1.910 x 89)+(11.240 x 53)+(2.720 x 84)+(0.610 x 61)+(2.150 x 73)+(0.450 x 61)]/19.080 DA11 - UNDETAINED Q (cfs) Hyd. No. 1 -- 2 Year Q (cfs) 8.00 8.00 6.00 - 6.00 4.00 4.00 2.00 2.00 1 0.00 - - - - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 -o Hyd No. 1 Time (min) 18 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 2 ROW AND 4B-5 (POND11) Hydrograph type = SCS Runoff Peak discharge = 15.67 cfs Storm frequency = 2 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 32,040 cuft Drainage area = 4.270 ac Curve number = 86* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 3.62 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(3.740 x 89)+(0.530 x 67)]/4.270 ROW AND 4B-5 (POND11) Q (cfs) Hyd. No. 2--2 Year Q (cfs) 18.00 18.00 15.00 15.00 12.00 — 12.00 9.00 9.00 6.00 6.00 3.00 - 3.00 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 ®-- Hyd No. 2 Time (min) 19 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday,09/24/2018 Hyd. No. 3 BLOCK 8A AND 4A-2 (POND 11) Hydrograph type = SCS Runoff Peak discharge = 3.712 cfs Storm frequency = 2 yrs Time to peak = 724 min Time interval = 2 min Hyd. volume = 13,784 cult Drainage area = 6.670 ac Curve number = 60* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 15.70 min Total precip. = 3.62 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Composite(Area/CN)=[(4.770 x 58)+(1.900 x 65)]/6.670 BLOCK 8A AND 4A-2 (POND 11) CI(cfs) Hyd. No. 3--2 Year Q (cfs) 4.00 4.00 3.00 3.00 2.00 - 2.00 I 1 .,...... : _ _____ ____\ - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 3 Time (min) 20 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 4 4A-1 (POND 11) Hydrograph type = SCS Runoff Peak discharge = 20.50 cfs Storm frequency = 2 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 42,094 cuft Drainage area = 5.400 ac Curve number = 87* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 3.62 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(5.400 x 87)]/5.400 4A-1 (POND 11) Q (cfs) Hyd. No. 4 -- 2 Year Q(cfs) 21.00 21.00 18.00 18.00 15.00 15.00 12.00 12.00 9.00 ` 9.00 6.00 6.00 3.00 3.00 0.00 -- . 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 Hyd No. 4 Time (min) 21 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 5 DP-4A Hydrograph type = Reservoir Peak discharge = 10.53 cfs Storm frequency = 2 yrs Time to peak = 722 min Time interval = 2 min Hyd. volume = 41,583 cuft Inflow hyd. No. = 4 - 4A-1 (POND 11) Max. Elevation = 433.34 ft Reservoir name = DP-4A Max. Storage = 13,755 cuft Storage Indication method used. DP-4A Q( S) Hyd. No. 5 --2 Year Q (cfs) 21.00 21.00 18.00 18.00 15.00 15.00 12.00 12.00 9.00 9.00 6.00 — 6.00 3.00 3.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) - m Hyd No. 5 Hyd No. 4 11111111 Total storage used = 13,755 cuft 22 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 6 <no description> Hydrograph type = Combine Peak discharge = 24.04 cfs Storm frequency = 2 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume = 87,407 cuft Inflow hyds. = 2, 3, 5 Contrib. drain. area = 10.940 ac <no description> Q (cfs) Hyd. No. 6--2 Year Q (cfs) 28.00 28.00 24.00 24.00 20.00 20.00 16.00 16.00 12.00 12.00 8.00 8.00 4.00 4.00 0.00 — '%,. .••••••— 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hyd No. 6 Hyd No. 2 Hyd No. 3 Hyd No. 5 23 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 7 Pond 11 Hydrograph type = Reservoir Peak discharge = 1.596 cfs Storm frequency = 2 yrs Time to peak = 884 min Time interval = 2 min Hyd. volume = 87,370 cult Inflow hyd. No. = 6 - <no description> Max. Elevation = 401.39 ft Reservoir name = Pond 11 Max. Storage = 99,505 cult Storage Indication method used. Wet pond routing start elevation=399.00 ft. Pond 11 Q(cfs) Hyd. No. 7 -- 2 Year Q(cfs) 28.00 28.00 24.00 24.00 20.00 - 20.00 16.00 16.00 12.00lim.......-- 12.00 8.00 8.00 4.004.00 0.00 — 0.00 0 360 720 1080 1440 1800 2160 2520 2880 3240 Time (min) Hyd No. 7 Hyd No. 6 11111111 Total storage used = 99,505 cuft 24 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 8 <no description> Hydrograph type = Combine Peak discharge = 8.148 cfs Storm frequency = 2 yrs Time to peak = 748 min Time interval = 2 min Hyd. volume = 140,879 cuft Inflow hyds. = 1, 7 Contrib. drain. area = 19.080 ac <no description> Q (cfs) Hyd. No. 8--2 Year Q (cfs) 10.00 10.00 8.00 8.00 6.00 6.00 4.00 4.00 1::: - 0.00 0 240 480 720 960 1200 1440 1680 1920 2160 2400 Time (min) Hyd No. 8 Hyd No. 1 Hyd No. 7 25 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday, 09/24/2018 Hyd. No. 9 Level Spreader Hydrograph type = Reservoir Peak discharge = 8.145 cfs Storm frequency = 2 yrs Time to peak = 748 min Time interval = 2 min Hyd. volume = 140,222 cuft Inflow hyd. No. = 8 - <no description> Max. Elevation = 348.73 ft Reservoir name = Level Spreader Max. Storage = 802 cuft Storage Indication method used. Level Spreader Q (cfs) Q (cfs) Hyd. No. 9-- 2 Year 10.00 10.00 8.00 $ 8.00 6.00 6.00 4.00 4.00 2.00 2.00 0.00 - 0.00 0 240 480 720 960 1200 1440 1680 1920 2160 2400 Time (min) Hyd No. 9 Hyd No. 8 11111111 Total storage used = 802 cuft 26 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 10 Pre DAto POI - 11 Hydrograph type = SCS Runoff Peak discharge = 22.13 cfs Storm frequency = 2 yrs Time to peak = 726 min Time interval = 2 min Hyd. volume = 91,033 cuft Drainage area = 39.960 ac Curve number = 61* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 19.50 min Total precip. = 3.62 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=((16.740 x 63)+(17.880 x 60)+(5.340 x 60)]/39.960 Pre DAto POI - 11 Q (cfs) Hyd. No. 10-- 2 Year Q(cf$) 24.00 24.00 20.00 20.00 16.00 16.00 12.00 - 12.00 8.00 8.00 4.00 4.00 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 - —� Hyd No. 10 Time (min) 27 Hydrograph Summary Report„ ydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph No. type flow interval Peak volume hyd(s) elevation strge used Description (origin) (cfs) (min) (min) (cuft) (ft) (cuft) 1 SCS Runoff 20.73 2 746 132,175 ---- --- ----- DA11 -UNDETAINED 2 SCS Runoff 27.06 2 716 56.786 ---- ---- ROW AND 4B-5(POND11) 3 SCS Runoff 12.54 2 724 37,392 ---- ---- ----- BLOCK 8A AND 4A-2(POND 11) 4 SCS Runoff 34.91 2 716 73,726 ---- ---- ----- 4A-1 (POND 11) 5 Reservoir 25.66 2 720 73,215 4 434.37 18,927 DP-4A 6 Combine 57.95 2 718 167,393 2,3,5 ---- ----- <no description> 7 Reservoir 19.68 2 732 167,356 6 401.98 114,696 Pond 11 8 Combine 35.30 2 736 299,531 1,7 ---- <no description> 9 Reservoir 35.31 2 738 298,873 8 348.94 924 Level Spreader 10 SCS Runoff 72.25 2 726 240,741 --- ---- Pre DA to POI-11 Storm Routings Pond 11 (Road and 4A).gpw Return Period: 10 Year Monday, 09/24/2018 28 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 1 DA11 - UNDETAINED Hydrograph type = SCS Runoff Peak discharge = 20.73 cfs Storm frequency = 10 yrs Time to peak = 746 min Time interval = 2 min Hyd. volume = 132,175 cuft Drainage area = 19.080 ac Curve number = 64* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 52.00 min Total precip. = 5.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Composite(Area/CN)=[(1.910 x 89)+ (11.240 x 53)+(2.720 x 84)+(0.610 x 61)+ (2.150 x 73)+(0.450 x 61)]/19.080 DA11 - UNDETAINED Q (cfs) Hyd. No. 1 -- 10 Year 0 (cfs) 21.00 21.00 18.00 18.00 15.00 15.00 12.00 12.00 9.00 9.00 6.00 6.00 3.00 histi 3.00 11111111111111 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 -� Hyd No. 1 Time(min) 29 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 2 ROW AND 4B-5 (POND11) Hydrograph type = SCS Runoff Peak discharge = 27.06 cfs Storm frequency = 10 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 56,786 cult Drainage area = 4.270 ac Curve number = 86* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 5.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(3.740 x 89)+(0.530 x 67)]/4.270 ROW AND 4B-5 (POND11) Q(ems) Hyd. No. 2 -- 10 Year Q (cfs) 28.00 28.00 24.00 24.00 20.00 20.00 16.00 16.00 12.00 12.00 8.00 - 8.00 4.00 4.00 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 Hyd No. 2 Time (min) 30 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 3 BLOCK 8A AND 4A-2 (POND 11) Hydrograph type = SCS Runoff Peak discharge = 12.54 cfs Storm frequency = 10 yrs Time to peak = 724 min Time interval = 2 min Hyd. volume = 37,392 cuft Drainage area = 6.670 ac Curve number = 60* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 15.70 min Total precip. = 5.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(4.770 x 58)+(1.900 x 65)]/6.670 BLOCK 8A AND 4A-2 (POND 11) Q (cfs) Hyd. No. 3-- 10 Year Q (cfs) 14.00 14.00 12.00 12.00 10.00 10.00 8.00 8.00 6.00 6.00 4.00 4.00 :.:: . 2.00 — \ \""'-- 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 3 Time (min) 31 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 4 4A-1 (POND 11) Hydrograph type = SCS Runoff Peak discharge = 34.91 cfs Storm frequency = 10 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 73,726 cult Drainage area = 5.400 ac Curve number = 87* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 5.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(5.400 x 87)]/5.400 4A-1 (POND 11) Q (cfs) Hyd. No. 4-- 10 Year Q(cfs) 35.00 35.00 30.00 , 30.00 25.00 25.00 20.00 20.00 15.00 15.00 10.00 10.00 5.00 5.00 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 Hyd No. 4 Time (min) 32 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday,09/24/2018 Hyd. No. 5 DP-4A Hydrograph type = Reservoir Peak discharge = 25.66 cfs Storm frequency = 10 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume = 73,215 cuft Inflow hyd. No. = 4 - 4A-1 (POND 11) Max. Elevation = 434.37 ft Reservoir name = DP-4A Max. Storage = 18,927 cuft Storage Indication method used. DP-4A Q (cfs) Hyd. No. 5-- 10 Year Q (cfs) 35.00 - 35.00 30.00 30.00 25.00 - 25.00 20.00 20.00 15.00 15.00 10.00 10.00 5.00 5.00 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time(min) Hyd No. 5 Hyd No. 4 II I I I I I I Total storage used = 18,927 cuft 33 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday, 09/24/2018 Hyd. No. 6 <no description> Hydrograph type = Combine Peak discharge = 57.95 cfs Storm frequency = 10 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 167,393 cuft Inflow hyds. = 2, 3, 5 Contrib. drain. area = 10.940 ac <no description> (ds) Hyd. No. 6-- 10 Year Q 60.00 _ 60.00 50.00 50.00 40.00 40.00 30.00 30.00 20.00 20.00 10.00 10.00 0.00 - � .._, . ._.. _ 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hyd No. 6 Hyd No. 2 Hyd No. 3 Hyd No. 5 34 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 7 Pond 11 Hydrograph type = Reservoir Peak discharge = 19.68 cfs Storm frequency = 10 yrs Time to peak = 732 min Time interval = 2 min Hyd. volume = 167,356 cuft Inflow hyd. No. = 6 - <no description> Max. Elevation = 401.98 ft Reservoir name = Pond 11 Max. Storage = 114,696 cuft Storage Indication method used. Wet pond routing start elevation=399.00 ft. Pond 11 Q (cfs) Hyd. No. 7 -- 10 Year Q (cfs) 60.00 60.00 50.00 50.00 40.00 40.00 30.00 30.00 20.00 20.00 10.00 10.00 0.00 - ,T_._... L -, 0.00 0 240 480 720 960 1200 1440 1680 1920 2160 2400 Time (min) Hyd No. 7 Hyd No. 6 II 1 1 1 1 1 1 Total storage used = 114,696 cuft 35 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 8 <no description> Hydrograph type = Combine Peak discharge = 35.30 cfs Storm frequency = 10 yrs Time to peak = 736 min Time interval = 2 min Hyd. volume = 299,531 cuft Inflow hyds. = 1, 7 Contrib. drain. area = 19.080 ac <no description> Q (cfs) Hyd. No. 8 -- 10 Year � � 40.00 40.00 30.00 30.00 20.00 Y0.00 10.00 - 10.00 0.00 ' 0.00 0 240 480 720 960 1200 1440 1680 1920 2160 2400 Time (min) --� Hyd No. 8 Hyd No. 1 Hyd No. 7 36 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 9 Level Spreader Hydrograph type = Reservoir Peak discharge = 35.31 cfs Storm frequency = 10 yrs Time to peak = 738 min Time interval = 2 min Hyd. volume = 298,873 cuft Inflow hyd. No. = 8 - <no description> Max. Elevation = 348.94 ft Reservoir name = Level Spreader Max. Storage = 924 cuft Storage Indication method used. Level Spreader Q (cfs) Hyd. No. 9-- 10 Year 0 (cfs) 40.00 40.00 i , 30.00 30.00 t 20.00 20.00 10.00 10.00 0.00 - • 0.00 0 240 480 720 960 1200 1440 1680 1920 2160 2400 Time (min) Hyd No. 9 Hyd No. 8 11 1 1 1 1 1 1 Total storage used = 924 cuft 37 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 10 Pre DAto POI - 11 Hydrograph type = SCS Runoff Peak discharge = 72.25 cfs Storm frequency = 10 yrs Time to peak = 726 min Time interval = 2 min Hyd. volume = 240,741 cult Drainage area = 39.960 ac Curve number = 61* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 19.50 min Total precip. = 5.47 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(16.740 x 63)+(17.880 x 60)+(5.340 x 60)]/39.960 Pre DAto POI - 11 Q (cfs) Hyd. No. 10-- 10 Year Q (cfs) 80.00 80.00 70.00 70.00 60.00 60.00 50.00 50.00 40.00 40.00 30.00 30.00 20.00 20.00 10.00 10.00 0.00 _.-F — 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 10 Time (min) 38 Hydrograph Summary Repo Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Hyd. Hydrograph Peak Time Time to Hyd. Inflow Maximum Total Hydrograph No. type flow interval Peak volume hyd(s) elevation strge used Description (origin) (cfs) (min) (min) (cuft) (ft) (cuft) 1 SCS Runoff 53.12 2 746 318,921 -- --- ----- DA11 -UNDETAINED 2 SCS Runoff 48.49 2 716 105,708 — ----- ROW AND 4B-5(POND11) 3 SCS Runoff 34.13 2 722 96,251 --- --- BLOCK 8A AND 4A-2(POND 11) 4 SCS Runoff 61.94 2 716 135,925 -- -- ----- 4A-1 (POND 11) 5 Reservoir 51.99 2 720 135,414 4 435.18 23,416 DP-4A 6 Combine 127.02 2 718 337,374 2, 3,5 ---- ---- <no description> 7 Reservoir 103.83 2 722 337,337 6 402.95 143,223 Pond 11 8 Combine 128.57 2 722 656,258 1,7 --- ---- <no description> 9 Reservoir 128.58 2 722 655,601 8 349.34 1,178 Level Spreader 10 SCS Runoff 193.44 2 724 609,233 ---- ---- ----- Pre DA to POI-11 Storm Routings Pond 11 (Road and 4A).gpw Return Period: 100 Year Monday, 09/24 /2018 39 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 1 DA11 - UNDETAINED Hydrograph type = SCS Runoff Peak discharge = 53.12 cfs Storm frequency = 100 yrs Time to peak = 746 min Time interval = 2 min Hyd. volume = 318,921 cult Drainage area = 19.080 ac Curve number = 64* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 52.00 min Total precip. = 8.97 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(1.910 x 89)+(11.240 x 53)+(2.720 x 84)+(0.610 x 61)+ (2.150 x 73)+(0.450 x 61)]/19.080 DA11 - UNDETAINED Q s) Hyd. No. 1 -- 100 Year Q (cfs) 60.00 60.00 50.00 50.00 40.00 40.00 30.00 30.00 20.00 20.00 10.00 10.00 0.00 - - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 1 Time(min) 40 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 2 ROW AND 4B-5 (POND11) Hydrograph type = SCS Runoff Peak discharge = 48.49 cfs Storm frequency = 100 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 105,708 cuft Drainage area = 4.270 ac Curve number = 86* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 8.97 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 Composite(Area/CN)=[(3.740 x 89)+(0.530 x 67)]/4.270 ROW AND 4B-5 (POND11) Q (cfs) Hyd. No. 2-- 100 Year Q (cfs) 50.00 [ 50.00 40.00 40.00 1 30.00 30.00 20.00 - 20.00 10.00 10.00 0.00 — 0.00 0 120 240 360 480 600 720 840 960 1080 1200 Hyd No. 2 Time (min) 41 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 3 BLOCK 8A AND 4A-2 (POND 11) Hydrograph type = SCS Runoff Peak discharge = 34.13 cfs Storm frequency = 100 yrs Time to peak = 722 min Time interval = 2 min Hyd. volume = 96,251 cuft Drainage area = 6.670 ac Curve number = 60* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 15.70 min Total precip. = 8.97 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(4.770 x 58)+(1.900 x 65)]/6.670 BLOCK 8A AND 4A-2 (POND 11) Q (cfs) Hyd. No. 3-- 100 Year Q(cfs) 35.00 35.00 30.00 30.00 25.00 25.00 20.00 20.00 15.00 15.00 10.00 10.00 5.00 5.00 0.00 - I - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) -- Hyd No. 3 42 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 4 4A-1 (POND 11) Hydrograph type = SCS Runoff Peak discharge = 61.94 cfs Storm frequency = 100 yrs Time to peak = 716 min Time interval = 2 min Hyd. volume = 135,925 cuft Drainage area = 5.400 ac Curve number = 87* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 5.00 min Total precip. = 8.97 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(5.400 x 87))/5.400 4A-1 (POND 11) Q (cfs) Hyd. No. 4-- 100 Year Q(cfs) 70.00 70.00 60.00 60.00 50.00 50.00 40.00 40.00 30.00 30.00 - 20.00 20.00 I 1 10.00 10.00 J_— 0.00 - 0.00 0 120 240 360 480 600 720 840 960 1080 1200 Hyd No. 4 Time (min) 43 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 5 DP-4A Hydrograph type = Reservoir Peak discharge = 51.99 cfs Storm frequency = 100 yrs Time to peak = 720 min Time interval = 2 min Hyd. volume = 135,414 cuft Inflow hyd. No. = 4 - 4A-1 (POND 11) Max. Elevation = 435.18 ft Reservoir name = DP-4A Max. Storage = 23,416 cuft Storage Indication method used. DP-4A Q (cfs) Hyd. No. 5-- 100 Year Q(cfs) 70.00 70.00 60.00 60.00 50.00 - 50.00 40.00 40.00 30.00 30.00 20.00 I 20.00 10.00 _ ' 10.00 0.00 1- ' 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 Time (min) Hyd No. 5 Hyd No. 4 II 1 I I 1 I V Total storage used = 23,416 cuft 44 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday, 09/24/2018 Hyd. No. 6 <no description> Hydrograph type = Combine Peak discharge = 127.02 cfs Storm frequency = 100 yrs Time to peak = 718 min Time interval = 2 min Hyd. volume = 337,374 cuft Inflow hyds. = 2, 3, 5 Contrib. drain. area = 10.940 ac <no description> Q (cfs) Hyd. No. 6-- 100 Year (2(cfs) 140.00 140.00 120.00 120.00 100.00 100.00 80.00 80.00 60.00 60.00 40.00 40.00 20.00 20.00 0.00 �•. _ — 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time(min) Hyd No. 6 Hyd No. 2 Hyd No. 3 Hyd No. 5 45 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday.09/24/2018 Hyd. No. 7 Pond 11 Hydrograph type = Reservoir Peak discharge = 103.83 cfs Storm frequency = 100 yrs Time to peak = 722 min Time interval = 2 min Hyd. volume = 337,337 cuft Inflow hyd. No. = 6 - <no description> Max. Elevation = 402.95 ft Reservoir name = Pond 11 Max. Storage = 143,223 cuft Storage Indication method used. Wet pond routing start elevation=399.00 ft. Pond 11 Q (cfs) Hyd. No. 7-- 100 Year Q (cfs) 140.00 140.00 120.00 120.00 100.00 100.00 80.00 80.00 60.00 60.00 40.00 40.00 20.00 20.00 0.00 ' 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 1680 1800 Time (min) Hyd No. 7 Hyd No. 6 II 1 I I 1 I 1 Total storage used = 143,223 cuft 46 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 8 <no description> Hydrograph type = Combine Peak discharge = 128.57 cfs Storm frequency = 100 yrs Time to peak = 722 min Time interval = 2 min Hyd. volume = 656,258 cult Inflow hyds. = 1, 7 Contrib. drain. area = 19.080 ac <no description> Q (cfs) Hyd. No. 8-- 100 Year Q (cfs) 140.00 — 140.00 120.00 120.00 100.00 100.00 80.00 80.00 60.00 60.00 40.00 40.00 20.00 20.00 0.00 _41J 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) --- Hyd No. 8 Hyd No. 1 Hyd No. 7 47 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk,Inc.v2020 Monday,09/24/2018 Hyd. No. 9 Level Spreader Hydrograph type = Reservoir Peak discharge = 128.58 cfs Storm frequency = 100 yrs Time to peak = 722 min Time interval = 2 min Hyd. volume = 655,601 cuft Inflow hyd. No. = 8 - <no description> Max. Elevation = 349.34 ft Reservoir name = Level Spreader Max. Storage = 1,178 cuft Storage Indication method used. Level Spreader Q (cfs) Hyd. No. 9-- 100 Year Q (cfs) 140.00 140.00 120.00 120.00 100.00 100.00 80.00 80.00 60.00 60.00 40.00 40.00 20.00 20.00 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Time (min) Hyd No. 9 Hyd No. 8 II 1 1 1 1 1 1 Total storage used = 1,178 cuft 48 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk®Civil 3D®2019 by Autodesk, Inc.v2020 Monday,09/24/2018 Hyd. No. 10 Pre DA to POI - 11 Hydrograph type = SCS Runoff Peak discharge = 193.44 cfs Storm frequency = 100 yrs Time to peak = 724 min Time interval = 2 min Hyd. volume = 609,233 cuft Drainage area = 39.960 ac Curve number = 61* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = TR55 Time of conc. (Tc) = 19.50 min Total precip. = 8.97 in Distribution = Type II Storm duration = 24 hrs Shape factor = 484 *Composite(Area/CN)=[(16.740 x 63)+(17.880 x 60)+(5.340 x 60)]/39.960 Pre DAto POI - 11 Q (cfs) Hyd. No. 10-- 100 Year Q(cfs) 210.00 210.00 180.00 180.00 150.00 150.00 120.00 120.00 90.00 90.00 60.00 60.00 30.00 30.00 0.00 0.00 0 120 240 360 480 600 720 840 960 1080 1200 1320 1440 1560 Hyd No. 10 Time (min)