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SDP201200015 Calculations 2012-07-09
IVY FIRE STATION / KIRTLEY WAREHOUSE RENOVATIONS MINOR SITE PLAN AMENDMENT COUNTY OF ALBEMARLE, VIRGINIA DESIGN CALCULATIONS MARCH 9, 2012 REVISED: JULY 9, 2012 •""i • • • TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by: Craig Kotarski, PE Timmons Group 919 2nd Street S.E. Charlottesville, VA 22901 Table of Contents Section Title 1 Narrative 2 LD 204— Stormwater Inlet Computations 3 LD 229— Storm sewer Design Computations 4 LD 347—HGL Analysis 100 Series 6 HydroCAD—Predevelopment 7 HydroCAD—Postdevelopment 8 Water Quality Calculations 9 Infiltration Calculation 10 Soil Permeability Assessment Stormwater Narrative The Ivy Fire Station/Kirtley Warehouse Renovations project is increasing impervious area minimally on the site. The total increase is 0.05 acres over the 3.84 acre drainage area. This increase is being made up for by use of pervious pavers, which have 18 inches of space available for infiltration below the surface, which will allow excess volume to infiltrate. The 100 series pipe system is also picking up off site stormwater, allowing it to route through the Ivy Fire Station pipe system, as it previously was outleting to an existing swale. The outlet of the Ivy Fire Station and the existing swale are the same. The runoff volume and peak flow will be reduced by way of the pervious pavers. Due to this, MS-19 calculations for downstream channels and properties will not be required. Pre-development versus post-development flows are as follows: Pre-development Post-development Q2 12.37 cfs 12.11 cfs Q10 22.84 cfs 22.37 cfs Q100 42.56 cfs 42.00 cfs The volume has also been reduced from pre-development to the post-development condition because of the use of pavers. The volumes are as follows: Pre-development Post-development 2 Year Volume 0.599 acre-feet 0.587 acre-feet 10 Year Volume 1.127 acre-feet 1.109 acre-feet 100 Year Volume 2.172 acre-feet 2.152 acre-feet The total storage available beneath the paver system is 1,701 cubic feet, which will be allowed to infiltrate. The runoff going towards the pavers (and therefore infiltrating) is 0.08 acres. The WQV (first half-inch of runoff) is as follows: 0.08 acres * 43,560 sf* 0.5 inches * (1 foot/ 12 inches) = 145 cubic feet All required quality treatment is being treated within the system as well, as it is sized to handle the first inch of runoff from its impervious area around it, giving a reduction of 65%. N N 0 N Sxavw:fa 3 .-1 a x .-I a 3 3 , `" N O A a , u 8 u 0 ° w z m m m m m m m m m Z izzw ' ui N ON'1-.1) - n DVS n)(IVAILIS1 ,p ry o ❑ U1 F C <ZO WP o O 0 u1 _ N E m ON'09 H e . 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J U z v K z w a 0 v 0 0 0 CO CO ,- p 0 Z 0 Z U o= z (if 1 s Predeveloped SubCat Reach -on. Drainage Diagram for pre Prepared by Microsoft, Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC pre Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 2.270 69 (1S) 1.570 98 (1S) 3.840 TOTAL AREA pre Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 0.000 HSG D 3.840 Other 1S 3.840 TOTAL AREA pre Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 4 Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Predeveloped Runoff Area=3.840 ac 40.89% Impervious Runoff Depth=3.52" Tc=6.0 min CN=81 Runoff=22.84 cfs 1.127 of Total Runoff Area =3.840 ac Runoff Volume= 1.127 of Average Runoff Depth =3.52" 59.11% Pervious =2.270 ac 40.89% Impervious= 1.570 ac pre Type 11 24-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 1S: Predeveloped Runoff = 22.84 cfs @ 11.97 hrs, Volume= 1.127 af, Depth= 3.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Type II 24-hr Alb 10 year Rainfall=5.60" Area (ac) CN Description * 2.270 69 * 1.570 98 3.840 81 Weighted Average 2.270 59.11% Pervious Area 1.570 40.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: Predeveloped Hydrograph / 254, D Runoff 24- 1 22.84 cfs I 22: / TYPO 1124-hr�1 � 10yar 21 201';- Rainfall=5.60" -- 19 18; Runoff Area=3.840 air--- 15_ Runt Volume=1.12-? of 14 52 13 L R n� Depth=3.� 0 12- - - • 'r ` L.T. 11= '__-- Tc=6yO inin==_ 10= J : 8� 5' 4 / 1. 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) pre Type 11 24-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 6 Hydrograph for Subcatchment 1S: Predeveloped Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 26.00 5.60 3.52 0.00 0.50 0.03 0.00 0.00 26.50 5.60 3.52 0.00 1.00 0.06 0.00 0.00 27.00 5.60 3.52 0.00 1.50 0.09 0.00 0.00 27.50 5.60 3.52 0.00 2.00 0.12 0.00 0.00 28.00 5.60 3.52 0.00 2.50 0.16 0.00 0.00 28.50 5.60 3.52 0.00 3.00 0.19 0.00 0.00 29.00 5.60 3.52 0.00 3.50 0.23 0.00 0.00 29.50 5.60 3.52 0.00 4.00 0.27 0.00 0.00 30.00 5.60 3.52 0.00 4.50 0.31 0.00 0.00 30.50 5.60 3.52 0.00 5.00 0.35 0.00 0.00 31.00 5.60 3.52 0.00 5.50 0.40 0.00 0.00 31.50 5.60 3.52 0.00 6.00 0.45 0.00 0.00 32.00 5.60 3.52 0.00 6.50 0.50 0.00 0.01 32.50 5.60 3.52 0.00 7.00 0.55 0.00 0.03 33.00 5.60 3.52 0.00 7.50 0.61 0.01 0.05 33.50 5.60 3.52 0.00 8.00 0.67 0.02 0.07 34.00 5.60 3.52 0.00 8.50 0.74 0.03 0.11 34.50 5.60 3.52 0.00 9.00 0.82 0.05 0.16 35.00 5.60 3.52 0.00 9.50 0.91 0.07 0.20 35.50 5.60 3.52 0.00 10.00 1.01 0.10 0.28 36.00 5.60 3.52 0.00 10.50 1.14 0.15 0.42 36.50 5.60 3.52 0.00 11.00 1.32 0.22 0.66 37.00 5.60 3.52 0.00 11.50 1.58 0.36 1.26 37.50 5.60 3.52 0.00 12.00 3.71 1.88 21.61 38.00 5.60 3.52 0.00 12.50 4.12 2.22 1.98 38.50 5.60 3.52 0.00 13.00 4.32 2.40 1.22 39.00 5.60 3.52 0.00 13.50 4.47 2.53 0.93 39.50 5.60 3.52 0.00 14.00 4.59 2.63 0.73 40.00 5.60 3.52 0.00 14.50 4.69 2.71 0.65 40.50 5.60 3.52 0.00 15.00 4.78 2.79 0.58 41.00 5.60 3.52 0.00 15.50 4.86 2.86 0.52 41.50 5.60 3.52 0.00 16.00 4.93 2.92 0.45 42.00 5.60 3.52 0.00 16.50 4.99 2.98 0.42 42.50 5.60 3.52 0.00 17.00 5.05 3.03 0.40 43.00 5.60 3.52 0.00 17.50 5.11 3.08 0.37 43.50 5.60 3.52 0.00 18.00 5.16 3.12 0.35 44.00 5.60 3.52 0.00 18.50 5.21 3.17 0.33 44.50 5.60 3.52 0.00 19.00 5.25 3.21 0.30 45.00 5.60 3.52 0.00 19.50 5.29 3.25 0.28 45.50 5.60 3.52 0.00 20.00 5.33 3.28 0.26 46.00 5.60 3.52 0.00 20.50 5.37 3.31 0.25 46.50 5.60 3.52 0.00 21.00 5.40 3.34 0.24 47.00 5.60 3.52 0.00 21.50 5.44 3.37 0.24 47.50 5.60 3.52 0.00 22.00 5.47 3.41 0.23 48.00 5.60 3.52 0.00 22.50 5.50 3.44 0.23 23.00 5.54 3.46 0.23 23.50 5.57 3.49 0.22 24.00 5.60 3.52 0.22 24.50 5.60 3.52 0.00 25.00 5.60 3.52 0.00 25.50 5.60 3.52 0.00 pre Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 7 Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Predeveloped Runoff Area=3.840 ac 40.89% Impervious Runoff Depth=6.79" Tc=6.0 min CN=81 Runoff=42.56 cfs 2.172 af Total Runoff Area =3.840 ac Runoff Volume =2.172 af Average Runoff Depth =6.79" 59.11% Pervious=2.270 ac 40.89% Impervious= 1.570 ac pre Type ll 24-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 1S: Predeveloped Runoff = 42.56 cfs @ 11.97 hrs, Volume= 2.172 af, Depth= 6.79" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Type II 24-hr Alb 100 year Rainfall=9.10" Area (ac) CN Description * 2.270 69 * 1.570 98 3.840 81 Weighted Average 2.270 59.11% Pervious Area 1.570 40.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: Predeveloped Hydrograph 46 , ❑Runoff 44-p . 42.56 cfs i - -- --- - ype 0 year 40, - II2��hrAlb10 38' R - 36a" ainfaH 34r" �u� .$4d ac _ �f �►re�a�3 32' , 30 , _- ' _- - -- - Ru-roof€Volume=2.172 of 28 fn :26, ' , Runoff Depth=6.79"- - 24 , 0 22' - :-- -: , , : c=6 -- 20_ d0 min 18' _ -16- 14- 12: I 18] 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) pre Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 9 Hydrograph for Subcatchment 1S: Predeveloped Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 26.00 9.10 6.79 0.00 0.50 0.05 0.00 0.00 26.50 9.10 6.79 0.00 1.00 0.10 0.00 0.00 27.00 9.10 6.79 0.00 1.50 0.15 0.00 0.00 27.50 9.10 6.79 0.00 2.00 0.20 0.00 0.00 28.00 9.10 6.79 0.00 2.50 0.26 0.00 0.00 28.50 9.10 6.79 0.00 3.00 0.31 0.00 0.00 29.00 9.10 6.79 0.00 3.50 0.37 0.00 0.00 29.50 9.10 6.79 0.00 4.00 0.44 0.00 0.00 30.00 9.10 6.79 0.00 4.50 0.50 0.00 0.01 30.50 9.10 6.79 0.00 5.00 0.57 0.00 0.04 31.00 9.10 6.79 0.00 5.50 0.65 0.01 0.08 31.50 9.10 6.79 0.00 6.00 0.73 0.03 0.11 32.00 9.10 6.79 0.00 6.50 0.81 0.04 0.15 32.50 9.10 6.79 0.00 7.00 0.90 0.07 0.19 33.00 9.10 6.79 0.00 7.50 0.99 0.10 0.24 33.50 9.10 6.79 0.00 8.00 1.09 0.13 0.28 34.00 9.10 6.79 0.00 8.50 1.20 0.18 0.38 34.50 9.10 6.79 0.00 9.00 1.34 0.23 0.50 35.00 9.10 6.79 0.00 9.50 1.48 0.31 0.57 35.50 9.10 6.79 0.00 10.00 1.65 0.39 0.74 36.00 9.10 6.79 0.00 10.50 1.86 0.52 1.05 36.50 9.10 6.79 0.00 11.00 2.14 0.69 1.56 37.00 9.10 6.79 0.00 11.50 2.58 1.00 2.78 37.50 9.10 6.79 0.00 12.00 6.03 3.91 39.81 38.00 9.10 6.79 0.00 12.50 6.69 4.52 3.52 38.50 9.10 6.79 0.00 13.00 7.03 4.83 2.16 39.00 9.10 6.79 0.00 13.50 7.27 5.06 1.63 39.50 9.10 6.79 0.00 14.00 7.46 5.24 1.28 40.00 9.10 6.79 0.00 14.50 7.62 5.39 1.13 40.50 9.10 6.79 0.00 15.00 7.77 5.52 1.02 41.00 9.10 6.79 0.00 15.50 7.90 5.64 0.90 41.50 9.10 6.79 0.00 16.00 8.01 5.75 0.79 42.00 9.10 6.79 0.00 16.50 8.11 5.85 0.73 42.50 9.10 6.79 0.00 17.00 8.21 5.94 0.69 43.00 9.10 6.79 0.00 17.50 8.30 6.02 0.65 43.50 9.10 6.79 0.00 18.00 8.38 6.10 0.61 44.00 9.10 6.79 0.00 18.50 8.46 6.18 0.57 44.50 9.10 6.79 0.00 19.00 8.53 6.25 0.53 45.00 9.10 6.79 0.00 19.50 8.60 6.31 0.48 45.50 9.10 6.79 0.00 20.00 8.66 6.37 0.44 46.00 9.10 6.79 0.00 20.50 8.72 6.43 0.43 46.50 9.10 6.79 0.00 21.00 8.78 6.48 0.42 47.00 9.10 6.79 0.00 21.50 8.84 6.53 0.41 47.50 9.10 6.79 0.00 22.00 8.89 6.59 0.40 48.00 9.10 6.79 0.00 22.50 8.94 6.64 0.40 23.00 9.00 6.69 0.39 23.50 9.05 6.74 0.38 24.00 9.10 6.79 0.37 24.50 9.10 6.79 0.00 25.00 9.10 6.79 0.00 25.50 9.10 6.79 0.00 pre Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 10 Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Predeveloped Runoff Area=3.840 ac 40.89% Impervious Runoff Depth=1.87" Tc=6.0 min CN=81 Runoff=12.37 cfs 0.599 af Total Runoff Area=3.840 ac Runoff Volume =0.599 af Average Runoff Depth = 1.87" 59.11% Pervious=2.270 ac 40.89% Impervious= 1.570 ac pre Type ll 24-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment 1S: Predeveloped Runoff = 12.37 cfs © 11.97 hrs, Volume= 0.599 af, Depth= 1.87" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Type II 24-hr Alb 2 year Rainfall=3.70" Area (ac) CN Description * 2.270 69 * 1.570 98 3.840 81 Weighted Average 2.270 59.11% Pervious Area 1.570 40.89% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: Predeveloped Hydrograph Z. ❑Runoff 13= I 12.37 cfs I 12 Type 124- r Alb 2 year Rainfal103 70!" 0= Runoff Area=3440 ac _ 9 Run f -V-SOme=0.59$-af - RunOff'Depth1.$ "___ 3 ° min: Tc-6.0 i LL 6- 5_ CN 81 4 . oi / , .ilia ��I�� iii�iiii�iii�iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) pre Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Pace 12 Hydrograph for Subcatchment 1S: Predeveloped Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 26.00 3.70 1.87 0.00 0.50 0.02 0.00 0.00 26.50 3.70 1.87 0.00 1.00 0.04 0.00 0.00 27.00 3.70 1.87 0.00 1.50 0.06 0.00 0.00 27.50 3.70 1.87 0.00 2.00 0.08 0.00 0.00 28.00 3.70 1.87 0.00 2.50 0.10 0.00 0.00 28.50 3.70 1.87 0.00 3.00 0.13 0.00 0.00 29.00 3.70 1.87 0.00 3.50 0.15 0.00 0.00 29.50 3.70 1.87 0.00 4.00 0.18 0.00 0.00 30.00 3.70 1.87 0.00 4.50 0.20 0.00 0.00 30.50 3.70 1.87 0.00 5.00 0.23 0.00 0.00 31.00 3.70 1.87 0.00 5.50 0.26 0.00 0.00 31.50 3.70 1.87 0.00 6.00 0.30 0.00 0.00 32.00 3.70 1.87 0.00 6.50 0.33 0.00 0.00 32.50 3.70 1.87 0.00 7.00 0.37 0.00 0.00 33.00 3.70 1.87 0.00 7.50 0.40 0.00 0.00 33.50 3.70 1.87 0.00 8.00 0.44 0.00 0.00 34.00 3.70 1.87 0.00 8.50 0.49 0.00 0.00 34.50 3.70 1.87 0.00 9.00 0.54 0.00 0.02 35.00 3.70 1.87 0.00 9.50 0.60 0.01 0.04 35.50 3.70 1.87 0.00 10.00 0.67 0.02 0.08 36.00 3.70 1.87 0.00 10.50 0.75 0.03 0.14 36.50 3.70 1.87 0.00 11.00 0.87 0.06 0.25 37.00 3.70 1.87 0.00 11.50 1.05 0.11 0.54 37.50 3.70 1.87 0.00 12.00 2.45 0.91 11.86 38.00 3.70 1.87 0.00 12.50 2.72 1.10 1.14 38.50 3.70 1.87 0.00 13.00 2.86 1.20 0.71 39.00 3.70 1.87 0.00 13.50 2.96 1.28 0.54 39.50 3.70 1.87 0.00 14.00 3.03 1.34 0.43 40.00 3.70 1.87 0.00 14.50 3.10 1.39 0.38 40.50 3.70 1.87 0.00 15.00 3.16 1.44 0.34 41.00 3.70 1.87 0.00 15.50 3.21 1.48 0.31 41.50 3.70 1.87 0.00 16.00 3.26 1.51 0.27 42.00 3.70 1.87 0.00 16.50 3.30 1.55 0.25 42.50 3.70 1.87 0.00 17.00 3.34 1.58 0.24 43.00 3.70 1.87 0.00 17.50 3.37 1.61 0.22 43.50 3.70 1.87 0.00 18.00 3.41 1.63 0.21 44.00 3.70 1.87 0.00 18.50 3.44 1.66 0.20 44.50 3.70 1.87 0.00 19.00 3.47 1.68 0.18 45.00 3.70 1.87 0.00 19.50 3.50 1.71 0.17 45.50 3.70 1.87 0.00 20.00 3.52 1.73 0.15 46.00 3.70 1.87 0.00 20.50 3.55 1.75 0.15 46.50 3.70 1.87 0.00 21.00 3.57 1.77 0.15 47.00 3.70 1.87 0.00 21.50 3.59 1.78 0.14 47.50 3.70 1.87 0.00 22.00 3.61 1.80 0.14 48.00 3.70 1.87 0.00 22.50 3.64 1.82 0.14 23.00 3.66 1.84 0.14 23.50 3.68 1.85 0.13 24.00 3.70 1.87 0.13 24.50 3.70 1.87 0.00 25.00 3.70 1.87 0.00 25.50 3.70 1.87 0.00 41, Post Devel ped Storage Post Dev lopment /3NI > 4L ,----N...., Underground Storage (new Link) MP(SUbcat Reach 'On• Drainage a _ Prepared by MicrosoftDiagr, m Printed for post 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC post Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 2.220 69 (1S) 1.620 98 (1S, 2S) 3.840 TOTAL AREA post Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 0.000 HSG D 3.840 Other 1S, 2S 3.840 TOTAL AREA post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 4 Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Post Development Runoff Area=3.760 ac 40.96% Impervious Runoff Depth=3.52" Tc=6.0 min CN=81 Runoff=22.37 cfs 1.103 af Subcatchment 2S: Post Developed Runoff Area=0.080 ac 100.00% Impervious Runoff Depth=5.36" Tc=8.5 min CN=98 Runoff=0.58 cfs 0.036 af Pond 3P: Underground Storage Peak EIev=101.92' Storage=0.017 af Inflow=0.58 cfs 0.036 af Discarded=0.01 cfs 0.030 af Primary=0.08 cfs 0.006 af Outflow=0.09 cfs 0.036 af Link 4L: (new Link) Inflow=22.37 cfs 1.109 af Primary=22.37 cfs 1.109 af Total Runoff Area=3.840 ac Runoff Volume = 1.139 af Average Runoff Depth =3.56" 57.81% Pervious =2.220 ac 42.19% Impervious= 1.620 ac post Type ll 24-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 1S: Post Development Runoff = 22.37 cfs @ 11.97 hrs, Volume= 1.103 af, Depth= 3.52" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Type II 24-hr Alb 10 year Rainfall=5.60" Area (ac) CN Description * 2.220 69 * 1.540 98 3.760 81 Weighted Average 2.220 59.04% Pervious Area 1.540 40.96% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: Post Development Hydrograph 24' Cl Runoff 23i, id.I Type II 2 hr Alb 10 year 21- 29= Raiff fa11=5.60" _ 17_ ;Runoff Ares=$.?60 ac 16- 15_ unbftVolum`e=1 .10 - af_ _ 14, . 13- , - Ruunoff;Depth 3.52"_ 0 12 - LL 11-].,,, -- _ i ; Tc--6,r0 Mgr - 9 1 7 6 2 1 // '��II o //// /////////I//////////////////////////////////////////// %/ � 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Pane 6 Hydrograph for Subcatchment 1S: Post Development Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 26.00 5.60 3.52 0.00 0.50 0.03 0.00 0.00 26.50 5.60 3.52 0.00 1.00 0.06 0.00 0.00 27.00 5.60 3.52 0.00 1.50 0.09 0.00 0.00 27.50 5.60 3.52 0.00 2.00 0.12 0.00 0.00 28.00 5.60 3.52 0.00 2.50 0.16 0.00 0.00 28.50 5.60 3.52 0.00 3.00 0.19 0.00 0.00 29.00 5.60 3.52 0.00 3.50 0.23 0.00 0.00 29.50 5.60 3.52 0.00 4.00 0.27 0.00 0.00 30.00 5.60 3.52 0.00 4.50 0.31 0.00 0.00 30.50 5.60 3.52 0.00 5.00 0.35 0.00 0.00 31.00 5.60 3.52 0.00 5.50 0.40 0.00 0.00 31.50 5.60 3.52 0.00 6.00 0.45 0.00 0.00 32.00 5.60 3.52 0.00 6.50 0.50 0.00 0.01 32.50 5.60 3.52 0.00 7.00 0.55 0.00 0.03 33.00 5.60 3.52 0.00 7.50 0.61 0.01 0.05 33.50 5.60 3.52 0.00 8.00 0.67 0.02 0.07 34.00 5.60 3.52 0.00 8.50 0.74 0.03 0.10 34.50 5.60 3.52 0.00 9.00 0.82 0.05 0.16 35.00 5.60 3.52 0.00 9.50 0.91 0.07 0.19 35.50 5.60 3.52 0.00 10.00 1.01 0.10 0.27 36.00 5.60 3.52 0.00 10.50 1.14 0.15 0.41 36.50 5.60 3.52 0.00 11.00 1.32 0.22 0.65 37.00 5.60 3.52 0.00 11.50 1.58 0.36 1.24 37.50 5.60 3.52 0.00 12.00 3.71 1.88 21.16 38.00 5.60 3.52 0.00 12.50 4.12 2.22 1.94 38.50 5.60 3.52 0.00 13.00 4.32 2.40 1.20 39.00 5.60 3.52 0.00 13.50 4.47 2.53 0.91 39.50 5.60 3.52 0.00 14.00 4.59 2.63 0.72 40.00 5.60 3.52 0.00 14.50 4.69 2.71 0.63 40.50 5.60 3.52 0.00 15.00 4.78 2.79 0.57 41.00 5.60 3.52 0.00 15.50 4.86 2.86 0.51 41.50 5.60 3.52 0.00 16.00 4.93 2.92 0.44 42.00 5.60 3.52 0.00 16.50 4.99 2.98 0.41 42.50 5.60 3.52 0.00 17.00 5.05 3.03 0.39 43.00 5.60 3.52 0.00 17.50 5.11 3.08 0.37 43.50 5.60 3.52 0.00 18.00 5.16 3.12 0.34 44.00 5.60 3.52 0.00 18.50 5.21 3.17 0.32 44.50 5.60 3.52 0.00 19.00 5.25 3.21 0.30 45.00 5.60 3.52 0.00 19.50 5.29 3.25 0.27 45.50 5.60 3.52 0.00 20.00 5.33 3.28 0.25 46.00 5.60 3.52 0.00 20.50 5.37 3.31 0.24 46.50 5.60 3.52 0.00 21.00 5.40 3.34 0.24 47.00 5.60 3.52 0.00 21.50 5.44 3.37 0.23 47.50 5.60 3.52 0.00 22.00 5.47 3.41 0.23 48.00 5.60 3.52 0.00 22.50 5.50 3.44 0.23 23.00 5.54 3.46 0.22 23.50 5.57 3.49 0.22 24.00 5.60 3.52 0.21 24.50 5.60 3.52 0.00 25.00 5.60 3.52 0.00 25.50 5.60 3.52 0.00 post Type ll 24-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 2S: Post Developed Storage Runoff = 0.58 cfs @ 11.99 hrs, Volume= 0.036 af, Depth= 5.36" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Type II 24-hr Alb 10 year Rainfall=5.60" Area (ac) CN Description * 0.080 98 0.080 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.5 Direct Entry, Subcatchment 2S: Post Developed Storage Hydrograph 0.65 , 0 Runoff - 6 I 0.58 cfs .-.. ype It 24=hr AIb 10 year 0.55 - - Rainfall-45.60r 0.5- Runoff Are -0.0 0.45, $0 ac 0.4= Fttinoff,VOIOn*=!0.036 of , 0.35- Runoff Dep#h=5.36" _0 0.3- Tc=8.5 min LL - 0.25- ^ _^n 0.15 , , , - 0.05; '0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) post Type ll 24-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 2S: Post Developed Storage Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 26.00 5.60 5.36 0.00 0.50 0.03 0.00 0.00 26.50 5.60 5.36 0.00 1.00 0.06 0.00 0.00 27.00 5.60 5.36 0.00 1.50 0.09 0.01 0.00 27.50 5.60 5.36 0,00 2.00 0.12 0.02 0.00 28.00 5.60 5.36 0.00 2.50 0.16 0.04 0.00 28.50 5.60 5.36 0.00 3.00 0.19 0.07 0.00 29.00 5.60 5.36 0.00 3.50 0.23 0,09 0.00 29.50 5.60 5.36 0.00 4.00 0.27 0.12 0.00 30.00 5.60 5.36 0.00 4.50 0.31 0.15 0.01 30.50 5.60 5.36 0.00 5.00 0.35 0.19 0.01 31.00 5.60 5.36 0.00 5.50 0.40 0.23 0.01 31.50 5.60 5.36 0.00 6.00 0.45 0.27 0,01 32.00 5.60 5.36 0.00 6.50 0.50 0.32 0.01 32.50 5.60 5.36 0.00 7.00 0,55 0.37 0.01 33.00 5.60 5.36 0.00 7.50 0.61 0.42 0.01 33.50 5.60 5.36 0.00 8.00 0.67 0.48 0.01 34.00 5.60 5.36 0.00 8.50 0.74 0.54 0,01 34.50 5.60 5.36 0.00 9.00 0.82 0.62 0.01 35.00 5.60 5.36 0.00 9.50 0.91 0.71 0.01 35.50 5.60 5.36 0.00 10.00 1.01 0.80 0.02 36.00 5.60 5.36 0.00 10.50 1.14 0.93 0.02 36.50 5.60 5.36 0.00 11.00 1.32 1.10 0.03 37.00 5.60 5.36 0.00 11.50 1.58 1.36 0.05 37.50 5.60 5.36 0.00 12.00 3.71 3.48 0.58 38.00 5.60 5.36 0.00 12.50 4.12 3.88 0.05 38.50 5.60 5.36 0.00 13.00 4.32 4.09 0.03 39.00 5.60 5.36 0.00 13.50 4.47 4.24 0.02 39.50 5.60 5.36 0.00 14.00 4.59 4.36 0.02 40.00 5.60 5.36 0.00 14.50 4.69 4.45 0.02 40.50 5.60 5.36 0.00 15.00 4.78 4.54 0.01 41.00 5.60 5.36 0.00 15.50 4.86 4.62 0.01 41.50 5.60 5.36 0.00 16.00 4.93 4.69 0.01 42.00 5.60 5.36 0.00 16.50 4.99 4.75 0.01 42.50 5.60 5.36 0.00 17.00 5.05 4.81 0.01 43.00 5.60 5.36 0.00 17.50 5.11 4.87 0.01 43.50 5.60 5.36 0.00 18.00 5.16 4.92 0.01 44.00 5.60 5.36 0.00 18.50 5.21 4.97 0.01 44.50 5.60 5.36 0.00 19.00 5.25 5.01 0.01 45.00 5.60 5.36 0.00 19.50 5.29 5.06 0.01 45.50 5.60 5.36 0.00 20.00 5.33 5.09 0.01 46.00 5.60 5.36 0.00 20.50 5.37 5.13 0.01 46.50 5.60 5.36 0.00 21.00 5.40 5.17 0.01 47.00 5.60 5.36 0.00 21.50 5.44 5.20 0.01 47.50 5.60 5.36 0.00 22.00 5.47 5.23 0.01 48.00 5.60 5.36 0.00 22.50 5.50 5.27 0.01 23.00 5.54 5.30 0.01 23.50 5.57 5.33 0.01 24.00 5.60 5.36 0.00 24.50 5.60 5.36 0.00 25.00 5.60 5.36 0.00 25.50 5.60 5.36 0.00 post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 9 Summary for Pond 3P: Underground Storage Inflow Area = 0.080 ac,100.00% Impervious, Inflow Depth = 5.36" for Alb 10 year event Inflow = 0.58 cfs @ 11.99 hrs, Volume= 0.036 af Outflow = 0.09 cfs @ 12.26 hrs, Volume= 0.036 af, Atten= 84%, Lag= 16.4 min Discarded = 0.01 cfs @ 8.55 hrs, Volume= 0.030 af Primary = 0.08 cfs @ 12.26 hrs, Volume= 0.006 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Peak Elev= 101.92' @ 12.26 hrs Surf.Area= 0.022 ac Storage= 0.017 af Plug-Flow detention time= 499.9 min calculated for 0.036 af(100% of inflow) Center-of-Mass det. time= 500.4 min ( 1,244.8 - 744.4 ) Volume Invert Avail.Storage Storage Description #1 100.00' 0.023 af Custom Stage Data (Prismatic) Listed below(Recaic) 0.059 af Overall x 40.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 100.00 0.022 0.000 0.000 101.75 0.022 0.039 0.039 102.67 0.022 0.020 0.059 Device Routing Invert Outlet Devices #1 Primary 101.75' 6.0"Vert. Orifice/Grate C= 0.600 #2 Discarded 100.00' 0.01 cfs Exfiltration at all elevations Discarded OutFlow Max=0.01 cfs @ 8.55 hrs HW=100.03' (Free Discharge) L2=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.08 cfs @ 12.26 hrs HW=101.92' (Free Discharge) L1=Orifice/Grate (Orifice Controls 0.08 cfs @ 1.40 fps) post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 10 Pond 3P: Underground Storage Hydrograph Inflow 0.58 cfa ❑Outflow r inflow Area=0:080 aC E9 Discarded 0.65 1:1 Primary _ 0.6- Peak tEley=1 x1.92' 0.55:'.• 57 or y 017 a .a a .0. 0.45-" 0.35. 0 0.3- 0.251• 0.2= 0.09off,/ - - - --- 0.15- '/ " t// 0 09ra ��:0.1- ` � 0.05:, I j 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) Pond 3P: Underground Storage Stage-Discharge / ii Total +' 0 Discarded ❑Primary ® , /- 102 j: / Orifice/Grate m cu 0 w 101 0 Exfiltration 100 , , . , .. ,, , , .. . ,' .. ,'. .. .,'. . . , ,'.. . .,'. . . 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 Discharge (cfs) post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 11 Pond 3P: Underground Storage Stage-Area-Storage Surface/Horizontal/Wetted Area(acres) 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 0.022 ❑Surface f ❑Storage 102 - c W 101 Custom Stage Data 100- , . . r r-. , , 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 0.022 Storage(acre-feet) post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 12 Hydrograph for Pond 3P: Underground Storage Time Inflow Storage Elevation Outflow Discarded Primary (hours) (cfs) (acre-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0.000 100.00 0.00 0.00 0.00 1.00 0.00 0.000 100.00 0.00 0.00 0.00 2.00 0.00 0.000 100.01 0.00 0.00 0.00 3.00 0.00 0.000 100.01 0.00 0.00 0.00 4.00 0.00 0.000 100.01 0.00 0.00 0.00 5.00 0.01 0.000 100.01 0.01 0.01 0.00 6.00 0.01 0.000 100.02 0.01 0.01 0.00 7.00 0.01 0.000 100.02 0.01 0.01 0.00 8.00 0.01 0.000 100.02 0.01 0.01 0.00 9.00 0.01 0.000 100.04 0.01 0.01 0.00 10.00 0.02 0.001 100.08 0.01 0.01 0.00 11.00 0.03 0.002 100.19 0.01 0.01 0.00 12.00 0.58 0.012 101.36 0.01 0.01 0.00 13.00 0.03 0.016 101.84 0.04 0.01 0.03 14.00 0.02 0.016 101.81 0.02 0.01 0.01 15.00 0.01 0.016 101.79 0.02 0.01 0.01 16.00 0.01 0.016 101.78 0.01 0.01 0.00 17.00 0.01 0.016 101.76 0.01 0.01 0.00 18.00 0.01 0.015 101.75 0.01 0.01 0.00 19.00 0.01 0.015 101.73 0.01 0.01 0.00 20.00 0.01 0.015 101.70 0.01 0.01 0.00 21.00 0.01 0.015 101.66 0.01 0.01 0.00 22.00 0.01 0.014 101.61 0.01 0.01 0.00 23.00 0.01 0.014 101.57 0.01 0.01 0.00 24.00 0.00 0.013 101.52 0.01 0.01 0.00 25.00 0.00 0.013 101.44 0.01 0.01 0.00 26.00 0.00 0.012 101.34 0.01 0.01 0.00 27.00 0.00 0.011 101.25 0.01 0.01 0.00 28.00 0.00 0.010 101.15 0.01 0.01 0.00 29.00 0.00 0.009 101.06 0.01 0.01 0.00 30.00 0.00 0.009 100.97 0.01 0.01 0.00 31.00 0.00 0.008 100.87 0.01 0.01 0.00 32.00 0.00 0.007 100.78 0.01 0.01 0.00 33.00 0.00 0.006 100.69 0.01 0.01 0.00 34.00 0.00 0.005 100.59 0.01 0.01 0.00 35.00 0.00 0.004 100.50 0.01 0.01 0.00 36.00 0.00 0.004 100.40 0.01 0.01 0.00 37.00 0.00 0.003 100.31 0.01 0.01 0.00 38.00 0.00 0.002 100.22 0.01 0.01 0.00 39.00 0.00 0.001 100.12 0.01 0.01 0.00 40.00 0.00 0.000 100.03 0.01 0.01 0.00 41.00 0.00 0.000 100.00 0.00 0.00 0.00 42.00 0.00 0.000 100.00 0.00 0.00 0.00 43.00 0.00 0.000 100.00 0.00 0.00 0.00 44.00 0.00 0.000 100.00 0.00 0.00 0.00 45.00 0.00 0.000 100.00 0.00 0.00 0.00 46.00 0.00 0.000 100.00 0.00 0.00 0.00 47.00 0.00 0.000 100.00 0.00 0.00 0.00 48.00 0.00 0.000 100.00 0.00 0.00 0.00 post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 13 Stage-Discharge for Pond 3P: Underground Storage Elevation Discharge Discarded Primary Elevation Discharge Discarded Primary (feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs) 100.00 0.00 0.00 0.00 102.60 0.74 0.01 0.73 100.05 0.01 0.01 0.00 102.65 0.77 0.01 0.76 100.10 0.01 0.01 0.00 100.15 0.01 0.01 0.00 100.20 0.01 0.01 0.00 100.25 0.01 0.01 0.00 100.30 0.01 0.01 0.00 100.35 0.01 0.01 0.00 100.40 0.01 0.01 0.00 100.45 0.01 0.01 0.00 100.50 0.01 0.01 0.00 100.55 0.01 0.01 0.00 100.60 0.01 0.01 0.00 100.65 0.01 0.01 0.00 100.70 0.01 0.01 0.00 100.75 0.01 0.01 0.00 100.80 0.01 0.01 0.00 100.85 0.01 0.01 0.00 100.90 0.01 0.01 0.00 100.95 0.01 0.01 0.00 101.00 0.01 0.01 0.00 101.05 0.01 0.01 0.00 101.10 0.01 0.01 0.00 101.15 0.01 0.01 0.00 101.20 0.01 0.01 0.00 101.25 0.01 0.01 0.00 101.30 0.01 0.01 0.00 101.35 0.01 0.01 0.00 101.40 0.01 0.01 0.00 101.45 0.01 0.01 0.00 101.50 0.01 0.01 0.00 101.55 0.01 0.01 0.00 101.60 0.01 0.01 0.00 101.65 0.01 0.01 0.00 101.70 0.01 0.01 0.00 101.75 0.01 0.01 0.00 101.80 0.02 0.01 0.01 101.85 0.04 0.01 0.03 101.90 0.08 0.01 0.07 101.95 0.12 0.01 0.11 102.00 0.18 0.01 0.17 102.05 0.24 0.01 0.23 102.10 0.31 0.01 0.30 102.15 0.37 0.01 0.36 102.20 0.44 0.01 0.43 102.25 0.48 0.01 0.47 102.30 0.53 0.01 0.52 102.35 0.57 0.01 0.56 102.40 0.61 0.01 0.60 102.45 0.64 0.01 0.63 102.50 0.68 0.01 0.67 102.55 0.71 0.01 0.70 post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 14 Stage-Area-Storage for Pond 3P: Underground Storage Elevation Surface Storage Elevation Surface Storage (feet) (acres) (acre-feet) (feet) (acres) (acre-feet) 100.00 0.022 0.000 102.60 0.022 0.023 100.05 0.022 0.000 102.65 0.022 0.023 100.10 0.022 0.001 100.15 0.022 0.001 100.20 0.022 0.002 100.25 0.022 0.002 100.30 0.022 0.003 100.35 0.022 0.003 100.40 0.022 0.004 100.45 0.022 0.004 100.50 0.022 0.004 100.55 0.022 0.005 100.60 0.022 0.005 100.65 0.022 0.006 100.70 0.022 0.006 100.75 0.022 0.007 100.80 0.022 0.007 100.85 0.022 0.007 100.90 0.022 0.008 100.95 0.022 0.008 101.00 0.022 0.009 101.05 0.022 0.009 101.10 0.022 0.010 101.15 0.022 0.010 101.20 0.022 0.011 101.25 0.022 0.011 101.30 0.022 0.011 101.35 0.022 0.012 101.40 0.022 0.012 101.45 0.022 0.013 101.50 0.022 0.013 101.55 0.022 0.014 101.60 0.022 0.014 101.65 0.022 0.015 101.70 0.022 0.015 101.75 0.022 0.015 101.80 0.022 0.016 101.85 0.022 0.016 101.90 0.022 0.017 101.95 0.022 0.017 102.00 0.022 0.018 102.05 0.022 0.018 102.10 0.022 0.018 102.15 0.022 0.019 102.20 0.022 0.019 102.25 0.022 0.020 102.30 0.022 0.020 102.35 0.022 0.021 102.40 0.022 0.021 102.45 0.022 0.022 102.50 0.022 0.022 102.55 0.022 0.022 post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 15 Summary for Link 4L: (new Link) Inflow Area = 3.840 ac, 42.19% Impervious, Inflow Depth = 3.47" for Alb 10 year event Inflow = 22.37 cfs @ 11.97 hrs, Volume= 1.109 of Primary = 22.37 cfs @ 11.97 hrs, Volume= 1.109 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Link 4L: (new Link) Hydrograph 25 ' __i Inflow 24= 122.37cfs 1 j ❑ Primary 22.37 cfs 23a • ; Inflow Area 3:840-ac 21-1 19' , 18' , 17' r 161 1 I r 4 151 ; 14: 13- 3 12' - - . 11= , 10. r 8' 7 ' 4: J ! zzc5 ���������������������������������������������f 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) a post Type 1124-hr Alb 10 year Rainfall=5.60" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 16 Hydrograph for Link 4L: (new Link) Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 26.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 26.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 27.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 27.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 28.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 28.50 0.00 0.00 0.00 3.00 0.00 0.00 0.00 29.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 29.50 0.00 0.00 0.00 4.00 0.00 0.00 0.00 30.00 0.00 0.00 0.00 4.50 0.00 0.00 0.00 30.50 0.00 0.00 0.00 5.00 0.00 0.00 0.00 31.00 0.00 0.00 0.00 5.50 0.00 0.00 0.00 31.50 0.00 0.00 0.00 6.00 0.00 0.00 0.00 32.00 0.00 0.00 0.00 6.50 0.01 0.00 0.01 32.50 0.00 0.00 0.00 7.00 0.03 0.00 0.03 33.00 0.00 0.00 0.00 7.50 0.05 0.00 0.05 33.50 0.00 0.00 0.00 8.00 0.07 0.00 0.07 34.00 0.00 0.00 0.00 8.50 0.10 0.00 0.10 34.50 0.00 0.00 0.00 9.00 0.16 0.00 0.16 35.00 0.00 0.00 0.00 9.50 0.19 0.00 0.19 35.50 0.00 0.00 0.00 10.00 0.27 0.00 0.27 36.00 0.00 0.00 0.00 10.50 0.41 0.00 0.41 36.50 0.00 0.00 0.00 11.00 0.65 0.00 0.65 37.00 0.00 0.00 0.00 11.50 1.24 0.00 1.24 37.50 0.00 0.00 0.00 12.00 21.16 0.00 21.16 38.00 0.00 0.00 0.00 12.50 2.00 0.00 2.00 38.50 0.00 0.00 0.00 13.00 1.22 0.00 1.22 39.00 0.00 0.00 0.00 13.50 0.92 0.00 0.92 39.50 0.00 0.00 0.00 14.00 0.73 0.00 0.73 40.00 0.00 0.00 0.00 14.50 0.64 0.00 0.64 40.50 0.00 0.00 0.00 15.00 0.57 0.00 0.57 41.00 0.00 0.00 0.00 15.50 0.51 0.00 0.51 41.50 0.00 0.00 0.00 16.00 0.44 0.00 0.44 42.00 0.00 0.00 0.00 16.50 0.41 0.00 0.41 42.50 0.00 0.00 0.00 17.00 0.39 0.00 0.39 43.00 0.00 0.00 0.00 17.50 0.37 0.00 0.37 43.50 0.00 0.00 0.00 18.00 0.34 0.00 0.34 44.00 0.00 0.00 0.00 18.50 0.32 0.00 0.32 44.50 0.00 0.00 0.00 19.00 0.30 0.00 0.30 45.00 0.00 0.00 0.00 19.50 0.27 0.00 0.27 45.50 0.00 0.00 0.00 20.00 0.25 0.00 0.25 46.00 0.00 0.00 0.00 20.50 0.24 0.00 0.24 46.50 0.00 0.00 0.00 21.00 0.24 0.00 0.24 47.00 0.00 0.00 0.00 21.50 0.23 0.00 0.23 47.50 0.00 0.00 0.00 22.00 0.23 0.00 0.23 48.00 0.00 0.00 0.00 22.50 0.23 0.00 0.23 23.00 0.22 0.00 0.22 23.50 0.22 0.00 0.22 24.00 0.21 0.00 0.21 24.50 0.00 0.00 0.00 25.00 0.00 0.00 0.00 25.50 0.00 0.00 0.00 post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 17 Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Post Development Runoff Area=3.760 ac 40.96% Impervious Runoff Depth=6.79" Tc=6.0 min CN=81 Runoff=41.68 cfs 2.126 of Subcatchment 2S: Post Developed Runoff Area=0.080 ac 100.00% Impervious Runoff Depth=8.86" Tc=8.5 min CN=98 Runoff=0.95 cfs 0.059 af Pond 3P: Underground Storage Peak Elev=102.45' Storage=0.022 af Inflow=0.95 cfs 0.059 af Discarded=0.01 cfs 0.033 af Primary=0.64 cfs 0.026 af Outflow=0.65 cfs 0.059 af Link 4L: (new Link) Inflow=42.00 cfs 2.152 af Primary=42.00 cfs 2.152 af Total Runoff Area=3.840 ac Runoff Volume =2.185 af Average Runoff Depth =6.83" 57.81% Pervious=2.220 ac 42.19% Impervious = 1.620 ac post Type 11 24-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 18 Summary for Subcatchment 1S: Post Development Runoff = 41.68 cfs @ 11.97 hrs, Volume= 2.126 af, Depth= 6.79" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Type 1124-hr Alb 100 year Rainfall=9.10" Area (ac) CN Description * 2.220 69 * 1.540 98 3.760 81 Weighted Average 2.220 59.04% Pervious Area 1.540 40.96% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: Post Development Hydrograph 46=" 44 ❑Runoff 42- 40] Type:II rZ4 C1r Alb 100 . � year 3 .. Rainfall=91� 6 , r 34' Runoff area=3.760 ac 32- 28- _-, Runoff Volume-2.126 af- - • 26:" n R�tn4ff flepth6:7 n ,• 22- 1 : tn' in LL , 20- TC�6;fl 18= 14-" , 8 6 / 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 19 Hydrograph for Subcatchment 1S: Post Development Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 26.00 9.10 6.79 0.00 0.50 0.05 0.00 0.00 26.50 9.10 6.79 0.00 1.00 0.10 0.00 0.00 27.00 9.10 6.79 0.00 1.50 0.15 0.00 0.00 27.50 9.10 6.79 0.00 2.00 0.20 0.00 0.00 28.00 9.10 6.79 0.00 2.50 0.26 0.00 0.00 28.50 9.10 6.79 0.00 3.00 0.31 0.00 0.00 29.00 9.10 6.79 0.00 3.50 0.37 0.00 0.00 29.50 9.10 6.79 0.00 4.00 0.44 0.00 0.00 30.00 9.10 6.79 0.00 4.50 0.50 0.00 0.01 30.50 9.10 6.79 0.00 5.00 0.57 0.00 0.04 31.00 9.10 6.79 0.00 5.50 0.65 0.01 0.07 31.50 9.10 6.79 0.00 6.00 0.73 0.03 0.11 32.00 9.10 6.79 0.00 6.50 0.81 0.04 0.15 32.50 9.10 6.79 0.00 7.00 0.90 0.07 0.19 33.00 9.10 6.79 0.00 7.50 0.99 0.10 0.23 33.50 9.10 6.79 0.00 8.00 1.09 0.13 0.28 34.00 9.10 6.79 0.00 8.50 1.20 0.18 0.37 34.50 9.10 6.79 0.00 9.00 1.34 0.23 0.49 35.00 9.10 6.79 0.00 9.50 1.48 0.31 0.56 35.50 9.10 6.79 0.00 10.00 1.65 0.39 0.73 36.00 9.10 6.79 0.00 10.50 1.86 0.52 1.02 36.50 9.10 6.79 0.00 11.00 2.14 0.69 1.53 37.00 9.10 6.79 0.00 11.50 2.58 1.00 2.72 37.50 9.10 6.79 0.00 12.00 6.03 3.91 38.98 38.00 9.10 6.79 0.00 12.50 6.69 4.52 3.45 38.50 9.10 6.79 0.00 13.00 7.03 4.83 2.11 39.00 9.10 6.79 0.00 13.50 7.27 5.06 1.60 39.50 9.10 6.79 0.00 14.00 7.46 5.24 1.26 40.00 9.10 6.79 0.00 14.50 7.62 5.39 1.11 40.50 9.10 6.79 0.00 15.00 7.77 5.52 0.99 41.00 9.10 6.79 0.00 15.50 7.90 5.64 0.88 41.50 9.10 6.79 0.00 16.00 8.01 5.75 0.77 42.00 9.10 6.79 0.00 16.50 8.11 5.85 0.72 42.50 9.10 6.79 0.00 17.00 8.21 5.94 0.68 43.00 9.10 6.79 0.00 17.50 8.30 6.02 0.64 43.50 9.10 6.79 0.00 18.00 8.38 6.10 0.60 44.00 9.10 6.79 0.00 18.50 8.46 6.18 0.56 44.50 9.10 6.79 0.00 19.00 8.53 6.25 0.52 45.00 9.10 6.79 0.00 19.50 8.60 6.31 0.47 45.50 9.10 6.79 0.00 20.00 8.66 6.37 0.43 46.00 9.10 6.79 0.00 20.50 8.72 6.43 0.42 46.50 9.10 6.79 0.00 21.00 8.78 6.48 0.41 47.00 9.10 6.79 0.00 21.50 8.84 6.53 0.40 47.50 9.10 6.79 0.00 22.00 8.89 6.59 0.40 48.00 9.10 6.79 0.00 22.50 8.94 6.64 0.39 23.00 9.00 6.69 0.38 23.50 9.05 6.74 0.37 24.00 9.10 6.79 0.36 24.50 9.10 6.79 0.00 25.00 9.10 6.79 0.00 25.50 9.10 6.79 0.00 post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 20 Summary for Subcatchment 2S: Post Developed Storage Runoff = 0.95 cfs @ 11.99 hrs, Volume= 0.059 af, Depth= 8.86" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Type II 24-hr Alb 100 year Rainfall=9.10" Area (ac) CN Description * 0.080 98 0.080 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.5 Direct Entry, Subcatchment 2S: Post Developed Storage Hydrograph ossf ❑Runoff � 1;I Type II 24 hr Alb 100 year Rainfall=9.10" Runoff f Area=0.080 ac Runoff Volume=0.059 af Runoff Depth=8.86" Tc=85 min CN=98 o 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 21 Hydrograph for Subcatchment 2S: Post Developed Storage Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 26.00 9.10 8.86 0.00 0.50 0.05 0.00 0.00 26.50 9.10 8.86 0.00 1.00 0.10 0.01 0.00 27.00 9.10 8.86 0.00 1.50 0.15 0.04 0.00 27.50 9.10 8.86 0.00 2.00 0.20 0.07 0.01 28.00 9.10 8.86 0.00 2.50 0.26 0.11 0.01 28.50 9.10 8.86 0.00 3.00 0.31 0.16 0.01 29.00 9.10 8.86 0.00 3.50 0.37 0.21 0.01 29.50 9.10 8.86 0.00 4.00 0.44 0.26 0.01 30.00 9.10 8.86 0.00 4.50 0.50 0.32 0.01 30.50 9.10 8.86 0.00 5.00 0.57 0.38 0.01 31.00 9.10 8.86 0.00 5.50 0.65 0.45 0.01 31.50 9.10 8.86 0.00 6.00 0.73 0.53 0.01 32.00 9.10 8.86 0.00 6.50 0.81 0.61 0.01 32.50 9.10 8.86 0.00 7.00 0.90 0.70 0.01 33.00 9.10 8.86 0.00 7.50 0.99 0.79 0.01 33.50 9.10 8.86 0.00 8.00 1.09 0.88 0.02 34.00 9.10 8.86 0.00 8.50 1.20 0.99 0.02 34.50 9.10 8.86 0.00 9.00 1.34 1.12 0.02 35.00 9.10 8.86 0.00 9.50 1.48 1.26 0.02 35.50 9.10 8.86 0.00 10.00 1.65 1.43 0.03 36.00 9.10 8.86 0.00 10.50 1.86 1.63 0.04 36.50 9.10 8.86 0.00 11.00 2.14 1.91 0.05 37.00 9.10 8.86 0.00 11.50 2.58 2.35 0.08 37.50 9.10 8.86 0.00 12.00 6.03 5.80 0.95 38.00 9.10 8.86 0.00 12.50 6.69 6.45 0.09 38.50 9.10 8.86 0.00 13.00 7.03 6.79 0.05 39.00 9.10 8.86 0.00 13.50 7.27 7.03 0.04 39.50 9.10 8.86 0.00 14.00 7.46 7.22 0.03 40.00 9.10 8.86 0.00 14.50 7.62 7.38 0.03 40.50 9.10 8.86 0.00 15.00 7.77 7.53 0.02 41.00 9.10 8.86 0.00 15.50 7.90 7.66 0.02 41.50 9.10 8.86 0.00 16.00 8.01 7.77 0.02 42.00 9.10 8.86 0.00 16.50 8.11 7.87 0.02 42.50 9.10 8.86 0.00 17.00 8.21 7.97 0.02 43.00 9.10 8.86 0.00 17.50 8.30 8.06 0.01 43.50 9.10 8.86 0.00 18.00 8.38 8.14 0.01 44.00 9.10 8.86 0.00 18.50 8.46 8.22 0.01 44.50 9.10 8.86 0.00 19.00 8.53 8.29 0.01 45.00 9.10 8.86 0.00 19.50 8.60 8.36 0.01 45.50 9.10 8.86 0.00 20.00 8.66 8.42 0.01 46.00 9.10 8.86 0.00 20.50 8.72 8.48 0.01 46.50 9.10 8.86 0.00 21.00 8.78 8.54 0.01 47.00 9.10 8.86 0.00 21.50 8.84 8.60 0.01 47.50 9.10 8.86 0.00 22.00 8.89 8.65 0.01 48.00 9.10 8.86 0.00 22.50 8.94 8.70 0.01 23.00 9.00 8.76 0.01 23.50 9.05 8.81 0.01 24.00 9.10 8.86 0.01 24.50 9.10 8.86 0.00 25.00 9.10 8.86 0.00 25.50 9.10 8.86 0.00 post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 22 Summary for Pond 3P: Underground Storage Inflow Area = 0.080 ac,100.00% Impervious, Inflow Depth = 8.86" for Alb 100 year event Inflow = 0.95 cfs @ 11.99 hrs, Volume= 0.059 af Outflow = 0.65 cfs @ 12.07 hrs, Volume= 0.059 af, Atten= 32%, Lag= 5.0 min Discarded = 0.01 cfs @ 4.95 hrs, Volume= 0.033 af Primary = 0.64 cfs @ 12.07 hrs, Volume= 0.026 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Peak Elev= 102.45' @ 12.07 hrs Surf.Area= 0.022 ac Storage= 0.022 af Plug-Flow detention time= 353.2 min calculated for 0.059 af(100% of inflow) Center-of-Mass det. time= 354.0 min ( 1,091.8 - 737.7 ) Volume Invert Avail.Storage Storage Description #1 100.00' 0.023 af Custom Stage Data (Prismatic) Listed below(Recalc) 0.059 af Overall x 40.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 100.00 0.022 0.000 0.000 101.75 0.022 0.039 0.039 102.67 0.022 0.020 0.059 Device Routing Invert Outlet Devices #1 Primary 101.75' 6.0"Vert. Orifice/Grate C= 0.600 #2 Discarded 100.00' 0.01 cfs Exfiltration at all elevations Discarded OutFlow Max=0.01 cfs @ 4.95 hrs HW=100.03' (Free Discharge) L2=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.62 cfs @ 12.07 hrs HW=102.43' (Free Discharge) t1=Orifice/Grate (Orifice Controls 0.62 cfs @ 3.17 fps) post Type ll 24-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 23 Pond 3P: Underground Storage Hydrograph l _ _ '- ❑ Inflow 095th 0 Outflow inflow Area ac � ■Discrded ®Primary ' Peak E1evi=102.45' 0 Storage=0.022 of 0.65 cfs - 0.64 cfs op 41 ..) U 3 o LL .„„ 4 �% ///!�//i% !/////////1//47 j: a //.5�/////////////////////////////////////////////////////////////// 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) Pond 3P: Underground Storage Stage-Discharge ./. ❑Total �/ ®Discarded T ' -- j/�� ❑Primary� �_ 102---1 02 ;0�'��',', 4 Orifice/Grate ' d .F2 m _ W 101 Exfiltration 100 j. . ,', . . . ,'. .. ... . . . . . .. .'. . . , . . . . ,'. , 0.'45. .. ,', , , . .. ,'.. . . ,'. . , , ,'.. .. ,'. .. 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.5 0.55 0.6 0.65 0.7 0.75 Discharge (cfs) post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 24 Pond 3P: Underground Storage Stage-Area-Storage Surface/Horizontal/Wetted Area(acres) 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 0.022 ❑Surface ❑Storage 102- m - m c - 0 W 101- Custom Stage Data---- : 100 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 0.022 Storage(acre-feet) post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 25 Hydrograph for Pond 3P: Underground Storage Time Inflow Storage Elevation Outflow Discarded Primary (hours) (cfs) (acre-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0.000 100.00 0.00 0.00 0.00 1.00 0.00 0.000 100.00 0.00 0.00 0.00 2.00 0.01 0.000 100.01 0.00 0.00 0.00 3.00 0.01 0.000 100.02 0.01 0.01 0.00 4.00 0.01 0.000 100.02 0.01 0.01 0.00 5.00 0.01 0.000 100.03 0.01 0.01 0.00 6.00 0.01 0.000 100.04 0.01 0.01 0.00 7.00 0.01 0.001 100.07 0.01 0.01 0.00 8.00 0.02 0.001 100.11 0.01 0.01 0.00 9.00 0.02 0.002 100.19 0.01 0.01 0.00 10.00 0.03 0.003 100.32 0.01 0.01 0.00 11.00 0.05 0.005 100.57 0.01 0.01 0.00 12.00 0.95 0.020 102.30 0.53 0.01 0.52 13.00 0.05 0.016 101.87 0.06 0.01 0.05 14.00 0.03 0.016 101.83 0.03 0.01 0.02 15.00 0.02 0.016 101.82 0.02 0.01 0.01 16.00 0.02 0.016 101.80 0.02 0.01 0.01 17.00 0.02 0.016 101.79 0.02 0.01 0.01 18.00 0.01 0.016 101.79 0.01 0.01 0.00 19.00 0.01 0.016 101.78 0.01 0.01 0.00 20.00 0.01 0.016 101.77 0.01 0.01 0.00 21.00 0.01 0.015 101.76 0.01 0.01 0.00 22.00 0.01 0.015 101.75 0.01 0.01 0.00 23.00 0.01 0.015 101.73 0.01 0.01 0.00 24.00 0.01 0.015 101.72 0.01 0.01 0.00 25.00 0.00 0.014 101.63 0.01 0.01 0.00 26.00 0.00 0.014 101.54 0.01 0.01 0.00 27.00 0.00 0.013 101.45 0.01 0.01 0.00 28.00 0.00 0.012 101.35 0.01 0.01 0.00 29.00 0.00 0.011 101.26 0.01 0.01 0.00 30.00 0.00 0.010 101.16 0.01 0.01 0.00 31.00 0.00 0.009 101.07 0.01 0.01 0.00 32.00 0.00 0.009 100.98 0.01 0.01 0.00 33.00 0.00 0.008 100.88 0.01 0.01 0.00 34.00 0.00 0.007 100.79 0.01 0.01 0.00 35.00 0.00 0.006 100.69 0.01 0.01 0.00 36.00 0.00 0.005 100.60 0.01 0.01 0.00 37.00 0.00 0.004 100.51 0.01 0.01 0.00 38.00 0.00 0.004 100.41 0.01 0.01 0.00 39.00 0.00 0.003 100.32 0.01 0.01 0.00 40.00 0.00 0.002 100.22 0.01 0.01 0.00 41.00 0.00 0.001 100.13 0.01 0.01 0.00 42.00 0.00 0.000 100.04 0.01 0.01 0.00 43.00 0.00 0.000 100.00 0.00 0.00 0.00 44.00 0.00 0.000 100.00 0.00 0.00 0.00 45.00 0.00 0.000 100.00 0.00 0.00 0.00 46.00 0.00 0.000 100.00 0.00 0.00 0.00 47.00 0.00 0.000 100.00 0.00 0.00 0.00 48.00 0.00 0.000 100.00 0.00 0.00 0.00 post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 26 Stage-Discharge for Pond 3P: Underground Storage Elevation Discharge Discarded Primary Elevation Discharge Discarded Primary (feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs) 100.00 0.00 0.00 0.00 102.60 0.74 0.01 0.73 100.05 0.01 0.01 0.00 102.65 0.77 0.01 0.76 100.10 0.01 0.01 0.00 100.15 0.01 0.01 0.00 100.20 0.01 0.01 0.00 100.25 0.01 0.01 0.00 100.30 0.01 0.01 0.00 100.35 0.01 0.01 0.00 100.40 0.01 0.01 0.00 100.45 0.01 0.01 0.00 100.50 0.01 0.01 0.00 100.55 0.01 0.01 0.00 100.60 0.01 0.01 0.00 100.65 0.01 0.01 0.00 100.70 0.01 0.01 0.00 100.75 0.01 0.01 0.00 100.80 0.01 0.01 0.00 100.85 0.01 0.01 0.00 100.90 0.01 0.01 0.00 100.95 0.01 0.01 0.00 101.00 0.01 0.01 0.00 101.05 0.01 0.01 0.00 101.10 0.01 0.01 0.00 101.15 0.01 0.01 0.00 101.20 0.01 0.01 0.00 101.25 0.01 0.01 0.00 101.30 0.01 0.01 0.00 101.35 0.01 0.01 0.00 101.40 0.01 0.01 0.00 101.45 0.01 0.01 0.00 101.50 0.01 0.01 0.00 101.55 0.01 0.01 0.00 101.60 0.01 0.01 0.00 101.65 0.01 0.01 0.00 101.70 0.01 0.01 0.00 101.75 0.01 0.01 0.00 101.80 0.02 0.01 0.01 101.85 0.04 0.01 0.03 101.90 0.08 0.01 0.07 101.95 0.12 0.01 0.11 102.00 0.18 0.01 0.17 102.05 0.24 0.01 0.23 102.10 0.31 0.01 0.30 102.15 0.37 0.01 0.36 102.20 0.44 0.01 0.43 102.25 0.48 0.01 0.47 102.30 0.53 0.01 0.52 102.35 0.57 0.01 0.56 102.40 0.61 0.01 0.60 102.45 0.64 0.01 0.63 102.50 0.68 0.01 0.67 102.55 0.71 0.01 0.70 post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 27 Stage-Area-Storage for Pond 3P: Underground Storage Elevation Surface Storage Elevation Surface Storage (feet) (acres) (acre-feet) (feet) (acres) (acre-feet) 100.00 0.022 0.000 102.60 0.022 0.023 100.05 0.022 0.000 102.65 0.022 0.023 100.10 0.022 0.001 100.15 0.022 0.001 100.20 0.022 0.002 100.25 0.022 0.002 100.30 0.022 0.003 100.35 0.022 0.003 100.40 0.022 0.004 100.45 0.022 0.004 100.50 0.022 0.004 100.55 0.022 0.005 100.60 0.022 0.005 100.65 0.022 0.006 100.70 0.022 0.006 100.75 0.022 0.007 100.80 0.022 0.007 100.85 0.022 0.007 100.90 0.022 0.008 100.95 0.022 0.008 101.00 0.022 0.009 101.05 0.022 0.009 101.10 0.022 0.010 101.15 0.022 0.010 101.20 0.022 0.011 101.25 0.022 0.011 101.30 0.022 0.011 101.35 0.022 0.012 101.40 0.022 0.012 101.45 0.022 0.013 101.50 0.022 0.013 101.55 0.022 0.014 101.60 0.022 0.014 101.65 0.022 0.015 101.70 0.022 0.015 101.75 0.022 0.015 101.80 0.022 0.016 101.85 0.022 0.016 101.90 0.022 0.017 101.95 0.022 0.017 102.00 0.022 0.018 102.05 0.022 0.018 102.10 0.022 0.018 102.15 0.022 0.019 102.20 0.022 0.019 102.25 0.022 0.020 102.30 0.022 0.020 102.35 0.022 0.021 102.40 0.022 0.021 102.45 0.022 0.022 102.50 0.022 0.022 102.55 0.022 0.022 post Type ll 24-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 28 Summary for Link 4L: (new Link) Inflow Area = 3.840 ac, 42.19% Impervious, Inflow Depth = 6.73" for Alb 100 year event Inflow = 42.00 cfs @ 11.97 hrs, Volume= 2.152 af Primary = 42.00 cfs @ 11.97 hrs, Volume= 2.152 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Link 4L: (new Link) Hydrograph 46 -- - , - ePima Inflow lazoo�rs l ❑Primary 44 42 1 2.00cf� Inflow Air eat S�Q _ 40. i . a� 38 36. , , , . 34= , 30_ - 26 j L "U 24=" , , 3 T 4 22= ' LL 20 I----, - --- -------- t 14 12 f i r 10 , r , S t , 8 - - '' t 2 %/ /l i., %/////////////////I/////i�,.�rf�i///////ice/ice/////rr/1.f////r, o / /j ///// // //I //i 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) post Type 1124-hr Alb 100 year Rainfall=9.10" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Pane 29 Hydrograph for Link 4L: (new Link) Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 26.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 26.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 27.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 27.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 28.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 28.50 0.00 0.00 0.00 3.00 0.00 0.00 0.00 29.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 29.50 0.00 0.00 0.00 4.00 0.00 0.00 0.00 30.00 0.00 0.00 0.00 4.50 0.01 0.00 0.01 30.50 0.00 0.00 0.00 5.00 0.04 0.00 0.04 31.00 0.00 0.00 0.00 5.50 0.07 0.00 0.07 31.50 0.00 0.00 0.00 6.00 0.11 0.00 0.11 32.00 0.00 0.00 0.00 6.50 0.15 0.00 0.15 32.50 0.00 0.00 0.00 7.00 0.19 0.00 0.19 33.00 0.00 0.00 0.00 7.50 0.23 0.00 0.23 33.50 0.00 0.00 0.00 8.00 0.28 0.00 0.28 34.00 0.00 0.00 0.00 8.50 0.37 0.00 0.37 34.50 0.00 0.00 0.00 9.00 0.49 0.00 0.49 35.00 0.00 0.00 0.00 9.50 0.56 0.00 0.56 35.50 0.00 0.00 0.00 10.00 0.73 0.00 0.73 36.00 0.00 0.00 0.00 10.50 1.02 0.00 1.02 36.50 0.00 0.00 0.00 11.00 1.53 0.00 1.53 37.00 0.00 0.00 0.00 11.50 2.72 0.00 2.72 37.50 0.00 0.00 0.00 12.00 39.50 0.00 39.50 38.00 0.00 0.00 0.00 12.50 3.55 0.00 3.55 38.50 0.00 0.00 0.00 13.00 2.16 0.00 2.16 39.00 0.00 0.00 0.00 13.50 1.63 0.00 1.63 39.50 0.00 0.00 0.00 14.00 1.28 0.00 1.28 40.00 0.00 0.00 0.00 14.50 1.12 0.00 1.12 40.50 0.00 0.00 0.00 15.00 1.01 0.00 1.01 41.00 0.00 0.00 0.00 15.50 0.89 0.00 0.89 41.50 0.00 0.00 0.00 16.00 0.78 0.00 0.78 42.00 0.00 0.00 0.00 16.50 0.72 0.00 0.72 42.50 0.00 0.00 0.00 17.00 0.68 0.00 0.68 43.00 0.00 0.00 0.00 17.50 0.64 0.00 0.64 43.50 0.00 0.00 0.00 18.00 0.60 0.00 0.60 44.00 0.00 0.00 0.00 18.50 0.56 0.00 0.56 44.50 0.00 0.00 0.00 19.00 0.52 0.00 0.52 45.00 0.00 0.00 0.00 19.50 0.48 0.00 0.48 45.50 0.00 0.00 0.00 20.00 0.43 0.00 0.43 46.00 0.00 0.00 0.00 20.50 0.42 0.00 0.42 46.50 0.00 0.00 0.00 21.00 0.41 0.00 0.41 47.00 0.00 0.00 0.00 21.50 0.40 0.00 0.40 47.50 0.00 0.00 0.00 22.00 0.40 0.00 0.40 48.00 0.00 0.00 0.00 22.50 0.39 0.00 0.39 23.00 0.38 0.00 0.38 23.50 0.37 0.00 0.37 24.00 0.36 0.00 0.36 24.50 0.00 0.00 0.00 25.00 0.00 0.00 0.00 25.50 0.00 0.00 0.00 post Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 30 Time span=0.00-48.00 hrs, dt=0.05 hrs, 961 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: Post Development Runoff Area=3.760 ac 40.96% Impervious Runoff Depth=1.87" Tc=6.0 min CN=81 Runoff=12.11 cfs 0.587 af Subcatchment 2S: Post Developed Runoff Area=0.080 ac 100.00% Impervious Runoff Depth=3.47" Tc=8.5 min CN=98 Runoff=0.38 cfs 0.023 af Pond 3P: Underground Storage Peak Elev=101.42' Storage=0.012 af Inflow=0.38 cfs 0.023 af Discarded=0.01 cfs 0.023 af Primary=0.00 cfs 0.000 af Outflow=0.01 cfs 0.023 af Link 4L: (new Link) Inflow=12.11 cfs 0.587 af Primary=12.11 cfs 0.587 af Total Runoff Area =3.840 ac Runoff Volume=0.610 af Average Runoff Depth = 1.91" 57.81% Pervious =2.220 ac 42.19% Impervious= 1.620 ac post Type ll 24-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 31 Summary for Subcatchment 1S: Post Development Runoff = 12.11 cfs @ 11.97 hrs, Volume= 0.587 af, Depth= 1.87" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Type II 24-hr Alb 2 year Rainfall=3.70" Area (ac) CN Description * 2.220 69 * 1.540 98 3.760 81 Weighted Average 2.220 59.04% Pervious Area 1.540 40.96% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 1S: Post Development Hydrograph 13 0 Runoff ; i2iicrsl - _ _ ; _ - 12- . 2 Type 11.24-hr;AIb 2 year 11. - aiilfal103.70', '°" Rlunflf A 'eia= 60 ac 8-" Runoff VblUm =fl.5$ of Runoff Depth g'71 87 L,. 6:. Tc 6.10 min 5= CN8i1 4j 2- 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) post Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 32 Hydrograph for Subcatchment 1S: Post Development Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 26.00 3.70 1.87 0.00 0.50 0.02 0.00 0.00 26.50 3.70 1.87 0.00 1.00 0.04 0.00 0.00 27.00 3.70 1.87 0.00 1.50 0.06 0.00 0.00 27.50 3.70 1.87 0.00 2.00 0.08 0.00 0.00 28.00 3.70 1.87 0.00 2.50 0.10 0.00 0.00 28.50 3.70 1.87 0.00 3.00 0.13 0.00 0.00 29.00 3.70 1.87 0.00 3.50 0.15 0.00 0.00 29.50 3.70 1.87 0.00 4.00 0.18 0.00 0.00 30.00 3.70 1.87 0.00 4.50 0.20 0.00 0.00 30.50 3.70 1.87 0.00 5.00 0.23 0.00 0.00 31.00 3.70 1.87 0.00 5.50 0.26 0.00 0.00 31.50 3.70 1.87 0.00 6.00 0.30 0.00 0.00 32.00 3.70 1.87 0.00 6.50 0.33 0.00 0.00 32.50 3.70 1.87 0.00 7.00 0.37 0.00 0.00 33.00 3.70 1.87 0.00 7.50 0.40 0.00 0.00 33.50 3.70 1.87 0.00 8.00 0.44 0.00 0.00 34.00 3.70 1.87 0.00 8.50 0.49 0.00 0.00 34.50 3.70 1.87 0.00 9.00 0.54 0.00 0.02 35.00 3.70 1.87 0.00 9.50 0.60 0.01 0.04 35.50 3.70 1.87 0.00 10.00 0.67 0.02 0.08 36.00 3.70 1.87 0.00 10.50 0.75 0.03 0.14 36.50 3.70 1.87 0.00 11.00 0.87 0.06 0.25 37.00 3.70 1.87 0.00 11.50 1.05 0.11 0.53 37.50 3.70 1.87 0.00 12.00 2.45 0.91 11.62 38.00 3.70 1.87 0.00 12.50 2.72 1.10 1.12 38.50 3.70 1.87 0.00 13.00 2.86 1.20 0.69 39.00 3.70 1.87 0.00 13.50 2.96 1.28 0.53 39.50 3.70 1.87 0.00 14.00 3.03 1.34 0.42 40.00 3.70 1.87 0.00 14.50 3.10 1.39 0.37 40.50 3.70 1.87 0.00 15.00 3.16 1.44 0.34 41.00 3.70 1.87 0.00 15.50 3.21 1.48 0.30 41.50 3.70 1.87 0.00 16.00 3.26 1.51 0.26 42.00 3.70 1.87 0.00 16.50 3.30 1.55 0.24 42.50 3.70 1.87 0.00 17.00 3.34 1.58 0.23 43.00 3.70 1.87 0.00 17.50 3.37 1.61 0.22 43.50 3.70 1.87 0.00 18.00 3.41 1.63 0.21 44.00 3.70 1.87 0.00 18.50 3.44 1.66 0.19 44.50 3.70 1.87 0.00 19.00 3.47 1.68 0.18 45.00 3.70 1.87 0.00 19.50 3.50 1.71 0.16 45.50 3.70 1.87 0.00 20.00 3.52 1.73 0.15 46.00 3.70 1.87 0.00 20.50 3.55 1.75 0.15 46.50 3.70 1.87 0.00 21.00 3.57 1.77 0.14 47.00 3.70 1.87 0.00 21.50 3.59 1.78 0.14 47.50 3.70 1.87 0.00 22.00 3.61 1.80 0.14 48.00 3.70 1.87 0.00 22.50 3.64 1.82 0.14 23.00 3.66 1.84 0.13 23.50 3.68 1.85 0.13 24.00 3.70 1.87 0.13 24.50 3.70 1.87 0.00 25.00 3.70 1.87 0.00 25.50 3.70 1.87 0.00 post Type ll 24-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 33 Summary for Subcatchment 2S: Post Developed Storage Runoff = 0.38 cfs @ 11.99 hrs, Volume= 0.023 af, Depth= 3.47" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Type 1 124-hr Alb 2 year Rainfall=3.70" Area (ac) CN Description * 0.080 98 0.080 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.5 Direct Entry, Subcatchment 2S: Post Developed Storage Hydrograph 0.42 _ _. 1 :_ 1 - ---- IR �Runoff 0.4' IC 38 cts' 0.38= i 7 - Type II 24-hr-Alb 2 YOU- 0.364 t ---- -- ; -0.34= r Rainfall=3:70" 0.32= 1 - , 0.3= .----, :-- ; Runoff Area=0.080 ac -. 0.28- --------;- ---� ---�-- -- -� � 0.26_ unoff VoItIme=0.023 :af__. N . o.2a= _ ,F_. _- . 0.22 , 0 0.2 - p 7 . c- .5 min u_ 0.18 0.16 a CN=98-- 0.14 0.12 -- 0.1 ,- 0.08 I 0.06 . -- 0.04 5 ' 0.00 � ���� Z 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) post Type II 24-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 34 Hydrograph for Subcatchment 2S: Post Developed Storage Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 26.00 3.70 3.47 0.00 0.50 0.02 0.00 0.00 26.50 3.70 3.47 0.00 1.00 0.04 0.00 0.00 27.00 3.70 3.47 0.00 1.50 0.06 0.00 0.00 27.50 3.70 3.47 0.00 2.00 0.08 0.01 0.00 28.00 3.70 3.47 0.00 2.50 0.10 0.01 0.00 28.50 3.70 3.47 0.00 3.00 0.13 0.03 0.00 29.00 3.70 3.47 0.00 3.50 0.15 0.04 0.00 29.50 3.70 3.47 0.00 4.00 0.18 0.05 0.00 30.00 3.70 3.47 0.00 4.50 0.20 0.07 0.00 30.50 3.70 3.47 0.00 5.00 0.23 0.09 0.00 31.00 3.70 3.47 0.00 5.50 0.26 0.12 0.00 31.50 3.70 3.47 0.00 6.00 0.30 0.14 0.00 32.00 3.70 3.47 0.00 6.50 0.33 0.17 0.00 32.50 3.70 3.47 0.00 7.00 0.37 0.20 0.00 33.00 3.70 3.47 0.00 7.50 0.40 0.23 0.01 33.50 3.70 3.47 0.00 8.00 0.44 0.27 0.01 34.00 3.70 3.47 0.00 8.50 0.49 0.31 0.01 34.50 3.70 3.47 0.00 9.00 0.54 0.36 0.01 35.00 3.70 3.47 0.00 9.50 0.60 0.41 0.01 35.50 3.70 3.47 0.00 10.00 0.67 0.47 0.01 36.00 3.70 3.47 0.00 10.50 0.75 0.56 0.01 36.50 3.70 3.47 0.00 11.00 0.87 0.66 0.02 37.00 3.70 3.47 0.00 11.50 1.05 0.84 0.03 37.50 3.70 3.47 0.00 12.00 2.45 2.22 0.38 38.00 3.70 3.47 0.00 12.50 2.72 2.49 0.03 38.50 3.70 3.47 0.00 13.00 2.86 2.63 0.02 39.00 3.70 3.47 0.00 13.50 2.96 2.72 0.02 39.50 3.70 3.47 0.00 14.00 3.03 2.80 0.01 40.00 3.70 3.47 0.00 14.50 3.10 2.87 0.01 40.50 3.70 3.47 0.00 15.00 3.16 2.93 0.01 41.00 3.70 3.47 0.00 15.50 3.21 2.98 0.01 41.50 3.70 3.47 0.00 16.00 3.26 3.02 0.01 42.00 3.70 3.47 0.00 16.50 3.30 3.06 0.01 42.50 3.70 3.47 0.00 17.00 3.34 3.10 0.01 43.00 3.70 3.47 0.00 17.50 3.37 3.14 0.01 43.50 3.70 3.47 0.00 18.00 3.41 3.17 0.01 44.00 3.70 3.47 0.00 18.50 3.44 3.21 0.01 44.50 3.70 3.47 0.00 19.00 3.47 3.24 0.00 45.00 3.70 3.47 0.00 19.50 3.50 3.26 0.00 45.50 3.70 3.47 0.00 20.00 3.52 3.29 0.00 46.00 3.70 3.47 0.00 20.50 3.55 3.31 0.00 46.50 3.70 3.47 0.00 21.00 3.57 3.34 0.00 47.00 3.70 3.47 0.00 21.50 3.59 3.36 0.00 47.50 3.70 3.47 0.00 22.00 3.61 3.38 0.00 48.00 3.70 3.47 0.00 22.50 3.64 3.40 0.00 23.00 3.66 3.42 0.00 23.50 3.68 3.45 0.00 24.00 3.70 3.47 0.00 24.50 3.70 3.47 0.00 25.00 3.70 3.47 0.00 25.50 3.70 3.47 0.00 post Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 35 Summary for Pond 3P: Underground Storage Inflow Area = 0.080 ac,100.00% Impervious, Inflow Depth = 3.47" for Alb 2 year event Inflow = 0.38 cfs @ 11.99 hrs, Volume= 0.023 af Outflow = 0.01 cfs @ 10.15 hrs, Volume= 0.023 af, Atten= 97%, Lag= 0.0 min Discarded = 0.01 cfs @ 10.15 hrs, Volume= 0.023 af Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Peak Elev= 101.42' @ 14.61 hrs Surf.Area= 0.022 ac Storage= 0.012 af Plug-Flow detention time= 473.9 min calculated for 0.023 af(100% of inflow) Center-of-Mass det. time= 474.1 min ( 1,225.9 - 751.8 ) Volume Invert Avail.Storage Storage Description #1 100.00' 0.023 af Custom Stage Data (Prismatic) Listed below(Recalc) 0.059 af Overall x 40.0% Voids Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 100.00 0.022 0.000 0.000 101.75 0.022 0.039 0.039 102.67 0.022 0.020 0.059 Device Routing Invert Outlet Devices #1 Primary 101.75' 6.0"Veil. Orifice/Grate C= 0.600 #2 Discarded 100.00' 0.01 cfs Exfiltration at all elevations Discarded OutFlow Max=0.01 cfs @ 10.15 hrs HW=100.03' (Free Discharge) 2=Exfiltration (Exfiltration Controls 0.01 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=100.00' (Free Discharge) t1=Orifice/Grate ( Controls 0.00 cfs) post Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Pane 36 Pond 3P: Underground Storage Hydrograph ..._`--.... . I 038 cfs( ■ i Inflow Outflow Primary Inflow Area 0 0$Q aC •Discarded' 0.38: - •-- •- ' v L -- `--`-- - Peak e 0.36: , t . ` : -:— ---: ILL----`----`- - ----1----1- --1---`--`- --`----`----•---- -- w 0.24= --t- - - ; -- ----- 0.16= ,-' ,9 ; . . 0.14: - -LL- 1 1 1 : I 0.12_ 1 1 1 01 0.08 f�/.f!fi/keike/,fi.. 0.06 ' 0.01 cfa ���ir�/�/������/�`�/�//////���. 0.04= .—_-_,..,,,.....„...,..,..,,,„:„..6,, 0. ',.e.V/7 . % / ///// ///I/ / //o 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) Pond 3P: Underground Storage Stage-Discharge rr IA .' eP`` 0 Total ir Air O �/ ❑Primary ed 102Le� A o / 0 g o m w 101 Exf'iftration 100 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 Discharge (cfs) post Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 37 Pond 3P: Underground Storage Stage-Area-Storage Surface/Horizontal/Wetted Area(acres) 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 0.022 0 Surface ❑Storage 102- w C . /Iw 101- Custom Stage Data • 100. . . . . . . . . . . . . . . . . . ... . . . , , r , ,', , . . , 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 0.022 Storage(acre-feet) post Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 38 Hydrograph for Pond 3P: Underground Storage Time Inflow Storage Elevation Outflow Discarded Primary (hours) (cfs) (acre-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0.000 100.00 0.00 0.00 0.00 1.00 0.00 0.000 100.00 0.00 0.00 0.00 2.00 0.00 0.000 100.00 0.00 0.00 0.00 3.00 0.00 0.000 100.00 0.00 0.00 0.00 4.00 0.00 0.000 100.01 0.00 0.00 0.00 5.00 0.00 0.000 100.01 0.00 0.00 0.00 6.00 0.00 0.000 100.01 0.00 0.00 0.00 7.00 0.00 0.000 100.01 0.00 0.00 0.00 8.00 0.01 0.000 100.01 0.01 0.01 0.00 9.00 0.01 0.000 100.02 0.01 0.01 0.00 10.00 0.01 0.000 100.03 0.01 0.01 0.00 11.00 0.02 0.001 100.07 0.01 0.01 0.00 12.00 0.38 0.007 100.80 0.01 0.01 0.00 13.00 0.02 0.012 101.36 0.01 0.01 0.00 14.00 0.01 0.012 101.41 0.01 0.01 0.00 15.00 0.01 0.012 101.42 0.01 0.01 0.00 16.00 0.01 0.012 101.40 0.01 0.01 0.00 17.00 0.01 0.012 101.37 0.01 0.01 0.00 18.00 0.01 0.012 101.33 0.01 0.01 0.00 19.00 0.00 0.011 101.28 0.01 0.01 0.00 20.00 0.00 0.011 101.23 0.01 0.01 0.00 21.00 0.00 0.010 101.17 0.01 0.01 0.00 22.00 0.00 0.010 101.11 0.01 0.01 0.00 23.00 0.00 0.009 101.05 0.01 0.01 0.00 24.00 0.00 0.009 100.99 0.01 0.01 0.00 25.00 0.00 0.008 100.90 0.01 0.01 0.00 26.00 0.00 0.007 100.80 0.01 0.01 0.00 27.00 0.00 0.006 100.71 0.01 0.01 0.00 28.00 0.00 0.005 100.61 0.01 0.01 0.00 29.00 0.00 0.005 100.52 0.01 0.01 0.00 30.00 0.00 0.004 100.43 0.01 0.01 0.00 31.00 0.00 0.003 100.33 0.01 0.01 0.00 32.00 0.00 0.002 100.24 0.01 0.01 0.00 33.00 0.00 0.001 100.15 0.01 0.01 0.00 34.00 0.00 0.000 100.05 0.01 0.01 0.00 35.00 0.00 0.000 100.00 0.00 0.00 0.00 36.00 0.00 0.000 100.00 0.00 0.00 0.00 37.00 0.00 0.000 100.00 0.00 0.00 0.00 38.00 0.00 0.000 100.00 0.00 0.00 0.00 39.00 0.00 0.000 100.00 0.00 0.00 0.00 40.00 0.00 0.000 100.00 0.00 0.00 0.00 41.00 0.00 0.000 100.00 0.00 0.00 0.00 42.00 0.00 0.000 100.00 0.00 0.00 0.00 43.00 0.00 0.000 100.00 0.00 0.00 0.00 44.00 0.00 0.000 100.00 0.00 0.00 0.00 45.00 0.00 0.000 100.00 0.00 0.00 0.00 46.00 0.00 0.000 100.00 0.00 0.00 0.00 47.00 0.00 0.000 100.00 0.00 0.00 0.00 48.00 0.00 0.000 100.00 0.00 0.00 0.00 post Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Pane 39 Stage-Discharge for Pond 3P: Underground Storage Elevation Discharge Discarded Primary Elevation Discharge Discarded Primary (feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs) 100.00 0.00 0.00 0.00 102.60 0.74 0.01 0.73 100.05 0.01 0.01 0.00 102.65 0.77 0.01 0.76 100.10 0.01 0.01 0.00 100.15 0.01 0.01 0.00 100.20 0.01 0.01 0.00 100.25 0.01 0.01 0.00 100.30 0.01 0.01 0.00 100.35 0.01 0.01 0.00 100.40 0.01 0.01 0.00 100.45 0.01 0.01 0.00 100.50 0.01 0.01 0.00 100.55 0.01 0.01 0.00 100.60 0.01 0.01 0.00 100.65 0.01 0.01 0.00 100.70 0.01 0.01 0.00 100.75 0.01 0.01 0.00 100.80 0.01 0.01 0.00 100.85 0.01 0.01 0.00 100.90 0.01 0.01 0.00 100.95 0.01 0.01 0.00 101.00 0.01 0.01 0.00 101.05 0.01 0.01 0.00 101.10 0.01 0.01 0.00 101.15 0.01 0.01 0.00 101.20 0.01 0.01 0.00 101.25 0.01 0.01 0.00 101.30 0.01 0.01 0.00 101.35 0.01 0.01 0.00 101.40 0.01 0.01 0.00 101.45 0.01 0.01 0.00 101.50 0.01 0.01 0.00 101.55 0.01 0.01 0.00 101.60 0.01 0.01 0.00 101.65 0.01 0.01 0.00 101.70 0.01 0.01 0.00 101.75 0.01 0.01 0.00 101.80 0.02 0.01 0.01 101.85 0.04 0.01 0.03 101.90 0.08 0.01 0.07 101.95 0.12 0.01 0.11 102.00 0.18 0.01 0.17 102.05 0.24 0.01 0.23 102.10 0.31 0.01 0.30 102.15 0.37 0.01 0.36 102.20 0.44 0.01 0.43 102.25 0.48 0.01 0.47 102.30 0.53 0.01 0.52 102.35 0.57 0.01 0.56 102.40 0.61 0.01 0.60 102.45 0.64 0.01 0.63 102.50 0.68 0.01 0.67 102.55 0.71 0.01 0.70 post Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Pane 40 Stage-Area-Storage for Pond 3P: Underground Storage Elevation Surface Storage Elevation Surface Storage (feet) (acres) (acre-feet) (feet) (acres) (acre-feet) 100.00 0.022 0.000 102.60 0.022 0.023 100.05 0.022 0.000 102.65 0.022 0.023 100.10 0.022 0.001 100.15 0.022 0.001 100.20 0.022 0.002 100.25 0.022 0.002 100.30 0.022 0.003 100.35 0.022 0.003 100.40 0.022 0.004 100.45 0.022 0.004 100.50 0.022 0.004 100.55 0.022 0.005 100.60 0.022 0.005 100.65 0.022 0.006 100.70 0.022 0.006 100.75 0.022 0.007 100.80 0.022 0.007 100.85 0.022 0.007 100.90 0.022 0.008 100.95 0.022 0.008 101.00 0.022 0.009 101.05 0.022 0.009 101.10 0.022 0.010 101.15 0.022 0.010 101.20 0.022 0.011 101.25 0.022 0.011 101.30 0.022 0.011 101.35 0.022 0.012 101.40 0.022 0.012 101.45 0.022 0.013 101.50 0.022 0.013 101.55 0.022 0.014 101.60 0.022 0.014 101.65 0.022 0.015 101.70 0.022 0.015 101.75 0.022 0.015 101.80 0.022 0.016 101.85 0.022 0.016 101.90 0.022 0.017 101.95 0.022 0.017 102.00 0.022 0.018 102.05 0.022 0.018 102.10 0.022 0.018 102.15 0.022 0.019 102.20 0.022 0.019 102.25 0.022 0.020 102.30 0.022 0.020 102.35 0.022 0.021 102.40 0.022 0.021 102.45 0.022 0.022 102.50 0.022 0.022 102.55 0.022 0.022 post Type ll 24-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 41 Summary for Link 4L: (new Link) Inflow Area = 3.840 ac, 42.19% Impervious, Inflow Depth = 1.83" for Alb 2 year event Inflow = 12.11 cfs @ 11.97 hrs, Volume= 0.587 of Primary = 12.11 cfs @ 11.97 hrs, Volume= 0.587 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs Link 4L: (new Link) Hydrograph i i : l Primary Inflow ,3." 121,th ° Inflow Area=3-.840 .ac ,2- 11;"' ,.." 1 r r 1 1 1 1 r 1. r I 1 1 : ,-' " " 10:" ,-" 1 r r i T F 1 7 7 . , - ,- i :_ 1 L ; -' i i 9-] w 7- 3 o 6 " 5 l_, i r „' : ' 3 1 /%��f�/ifs/lf/// /%/%//%/%//////////////////////////////////%///////////////////r 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Time (hours) post Type 1124-hr Alb 2 year Rainfall=3.70" Prepared by Microsoft Printed 7/6/2012 HydroCAD®9.10 s/n 06538 ©2010 HydroCAD Software Solutions LLC Page 42 Hydrograph for Link 4L: (new Link) Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 26.00 0.00 0.00 0.00 0.50 0.00 0.00 0.00 26.50 0.00 0.00 0.00 1.00 0.00 0.00 0.00 27.00 0.00 0.00 0.00 1.50 0.00 0.00 0.00 27.50 0.00 0.00 0.00 2.00 0.00 0.00 0.00 28.00 0.00 0.00 0.00 2.50 0.00 0.00 0.00 28.50 0.00 0.00 0.00 3.00 0.00 0.00 0.00 29.00 0.00 0.00 0.00 3.50 0.00 0.00 0.00 29.50 0.00 0.00 0.00 4.00 0.00 0.00 0.00 30.00 0.00 0.00 0.00 4.50 0.00 0.00 0.00 30.50 0.00 0.00 0.00 5.00 0.00 0.00 0.00 31.00 0.00 0.00 0.00 5.50 0.00 0.00 0.00 31.50 0.00 0.00 0.00 6.00 0.00 0.00 0.00 32.00 0.00 0.00 0.00 6.50 0.00 0.00 0.00 32.50 0.00 0.00 0.00 7.00 0.00 0.00 0.00 33.00 0.00 0.00 0.00 7.50 0.00 0.00 0.00 33.50 0.00 0.00 0.00 8.00 0.00 0.00 0.00 34.00 0.00 0.00 0.00 8.50 0.00 0.00 0.00 34.50 0.00 0.00 0.00 9.00 0.02 0.00 0.02 35.00 0.00 0.00 0.00 9.50 0.04 0.00 0.04 35.50 0.00 0.00 0.00 10.00 0.08 0.00 0.08 36.00 0.00 0.00 0.00 10.50 0.14 0.00 0.14 36.50 0.00 0.00 0.00 11.00 0.25 0.00 0.25 37.00 0.00 0.00 0.00 11.50 0.53 0.00 0.53 37.50 0.00 0.00 0.00 12.00 11.62 0.00 11.62 38.00 0.00 0.00 0.00 12.50 1.12 0.00 1.12 38.50 0.00 0.00 0.00 13.00 0.69 0.00 0.69 39.00 0.00 0.00 0.00 13.50 0.53 0.00 0.53 39.50 0.00 0.00 0.00 14.00 0.42 0.00 0.42 40.00 0.00 0.00 0.00 14.50 0.37 0.00 0.37 40.50 0.00 0.00 0.00 15.00 0.34 0.00 0.34 41.00 0.00 0.00 0.00 15.50 0.30 0.00 0.30 41.50 0.00 0.00 0.00 16.00 0.26 0.00 0.26 42.00 0.00 0.00 0.00 16.50 0.24 0.00 0.24 42.50 0.00 0.00 0.00 17.00 0.23 0.00 0.23 43.00 0.00 0.00 0.00 17.50 0.22 0.00 0.22 43.50 0.00 0.00 0.00 18.00 0.21 0.00 0.21 44.00 0.00 0.00 0.00 18.50 0.19 0.00 0.19 44.50 0.00 0.00 0.00 19.00 0.18 0.00 0.18 45.00 0.00 0.00 0.00 19.50 0.16 0.00 0.16 45.50 0.00 0.00 0.00 20.00 0.15 0.00 0.15 46.00 0.00 0.00 0.00 20.50 0.15 0.00 0.15 46.50 0.00 0.00 0.00 21.00 0.14 0.00 0.14 47.00 0.00 0.00 0.00 21.50 0.14 0.00 0.14 47.50 0.00 0.00 0.00 22.00 0.14 0.00 0.14 48.00 0.00 0.00 0.00 22.50 0.14 0.00 0.14 23.00 0.13 0.00 0.13 23.50 0.13 0.00 0.13 24.00 0.13 0.00 0.13 24.50 0.00 0.00 0.00 25.00 0.00 0.00 0.00 25.50 0.00 0.00 0.00 Water Quality Calculations for Ivy Fire Station / Kirtley Warehouse Renovations Area =0.78 acres Pre Impervious Area =0.51 acres Post Impervious Area =0.56 acres Ipre =0.51/0.78= 65.4% Lpre = 8.77 x (0.05 + (0.009 x Ipre)) x 0.35 x Area = 1.53 pounds Ipost=0.56/0.78=71.8% Lpost= 8.77 x (0.05 + (0.009 x Ipost)) x 0.35 x Area = 1.67 pounds Removal Required = 1.67-(0.85) 1.53 pounds= 0.37 pounds Area to Underground Storage/Infiltration Area =0.04 acres Impervious Area =0.04 acres I =0.08/0.08= 100% L=0.12 pounds Underground Storage Sized for first inch of runoff,therefore removal rate is 65% 0.12 x 0.65=0.08 pounds Area to Underground Hydrodynamic Seperator Area = 1.21 acres Impervious Area =0.73 acres I =0.73/1.21 = 60.3% L= 2.20 pounds Removal Rate is 20% 2.20 x 0.20=0.44 pounds 0.52 pounds >0.37 pounds Infiltration Calculation-Charlottesville High School Turf Field Average infiltration = 0.52 in/hr(from testing performed by CTI, see attached report) Area of infiltration = 972 square feet Infiltration Rate = (0.52 in/hr) (972 ft2) (I ft/ 12 in) (I hr/3600 sec) = 0.0117 cfs �` 1348 South Main Street C 1 ' Tacksburg,Virginia 24060 Teel: (540)552-1575 Fax: (540)552-2965 CONSULTANTS INC E-mail:cnewman @cti-consultants.com May 15,2012 County of Albemarle Office of Facilities Development 401 McIntire Road Charlottesville,Virginia 22902-4596 Attention: Ron Lilley Reference: Ivy Fire Station/Kirtley Warehouse-Charlottesville,Virginia Permeable Pavers-Soil Permeability Assessment CTI Project#11G-1155 Overview: The planned Ivy Fire Station requires accessory improvements to the existing Kirtley Warehouse, such as conversion of nine western parking spaces from bituminous asphalt to permeable pavers.The roughly 85 foot by 18 foot area will include three layers of open-graded crushed aggregate that become increasingly coarse with depth.A thin layer of#8 stone will bed the three inch thick pavers with intermediate#57 stone to choke the 30 inch layer of #2 aggregate. The invert of a perforated drain pipe provides 18 inches of #2 void spaces for prolonged retention and infiltration while the remaining aggregate provides short term detention and quantity treatment. The overall system will extend slightly less than three feet below surface grade, which will remains essentially unchanged. Additionally, the remainder of the parking lot will either be re-paved with bituminous asphalt or receive rigid pavement for the concrete apron and dumpster pad. Procedure: The field investigation was performed in accordance with the 1999 Virginia Stormwater Management Handbook (VSMH), which includes a brief reference to permeable concrete pavement in Minimum Standard 3.10D, which is associated with Minimum Standard 3.10 General Infiltration Practices. The Planning Considerations subsection of the standard provides guidelines for the performance of a subsurface analysis intended to provide the required design criteria. A CTI Representative visited the site on May 4th and 11th,2012 to perform two hand auger borings with locations that are depicted on the appended site plan excerpt from Timmons Group dated 4/6/12. Although the borings were intended for a depth of six feet,auger refusal in gravelly soil occurred at depths of#and#inches. The soil horizons were categorized as per the United States Department of Agriculture (USDA) Textural Triangle with additional notes regarding any soft, moist, or clearly unsuitable materials. Delineation of constituent sand/silt/clay percentages were determined in accordance with Description and Identification of Soils (Visual- Manual Procedure) (ASTM D2488)relative to the USDA particle sizes in conjunction with pertinent sections of Field Book for Describing and Sampling Soils(NRCS,2002). Design parameters pertaining to pavement design are based upon the previously performed drill rig borings associated with the adjacent LTACH project. The blow counts included in the logs have been converted to N60 values and correlated to appropriate subgrade parameters for input into the 1993 AASHTO Guide for Design of Pavement Structures. CHANTILLY,VA • RICHMOND,VA ■ GAITHERSBURG, MD • CHARLOTTESVILLE,VA ■ BALTIMORE, MD BLACKSBURG,VA • NORFOLK,VA • WINCHESTER,VA • RALEIGH/DURHAM, NC Geotechnical Engineering ■ Testing & Inspection • Quality Control ■ Environmental Services Code Compliance and Specialty Services 41t1.6TI CONSULTANTS INC Findings/Conclusions: Beneath surficial manmade Fill and disturbed residuum,both borings encountered soil that would be categorized as Loam on the USDA textural triangle.The horizon extended at least two feet below the anticipated basin depth and there were no indications of restrictive features associated with cemented lenses, shallow seasonal phreatic water,nor perched/elevated ground moisture. Based upon this, it appears that use of infiltration is appropriate at the investigated location and a conservative unfactored permeability(f) of 0.52 inches per hour may be assumed per VSMH Table 3.10-2. Care should be taken to minimize compactive energy applied to the basin subgrade during construction as the soils are capable of additional densification that could reduce infiltration rates beyond the typical two times factor of safety used for design. For flexible pavement, a preliminary resilient modulus (Mr) value of 12,000 psi is suggested while rigid pavement should utilize a conservative k value of 175 pci.Unknown traffic count and other parameters prevented evaluation of the flexible pavement section detailed on sheet C1.0 of the plans. The National Ready Mix Concrete Association (NRMCA) Concrete Pavement Analyst (V3) software was utilized to verify that the rigid pavement detail met the minimum section thickness detailed in ACI-300R Guide for Design and Construction of Concrete Parking Lots. Closure: This report has been prepared for the exclusive use of the Client, or their designated agent, for specific application to the referenced project in accordance with generally accepted geotechnical investigation practices. The scope of services was specifically limited to the referenced borings and is not intended to provide assurance regarding unexplored areas or those not explicitly described. The general design comments are intended to provide overall guidance and may not account for isolated areas of Fill, shallow rock, or other unforeseen conditions. No other warranty, express or implied, is made. Our conclusions are based on information furnished to CTI,the data obtained from the investigation,and generally accepted engineering practice. We appreciate the opportunity to provide testing and consultation services for your project. Please contact us if you have any questions regarding this report or if we may be of further assistance. Sincerely, ���LTHr� v CHARLES J.NEWMAN Lic. No.40732 Z '0% 444 Chuck Newman,PE r y Principal Engineer "14/0NAL CC: File ENC: Boring Locations,Boring Logs(2) Permeable Pavers Soil Permeability Assessment County of Albemarle Office of Facilities Development Ivy Fire Station/Kirtley Warehouse Charlottesville, Virginia 2/2 Digital Seal Applied by Chuck Newman 2012-05-15 f N - _ r _ . _. . . . - _ - — �, _ _ :— . ... .- ...�- T y _ i 14,.. t i r' qq X.:,* '':1''' 1 ....e.jil .1 ''''. i, \ i 3Ly ,. f, ,,".q'M1 ^t l k„,. ..„1/,....x........,.,„1., Z . ?J r .....�:.. 1 r g t,, fi 1111,1..", :..'.ii 4.' j4� 2 • , ,, • ., L _ .1 ii , ii 4a , , - Mii • � i • T ii _, 4 ! 1 ,it ilk' ' 4:. 71 •1 !illi %5 15 '. - }�, § iii Excerpted from Site Plan by Timmons Group (Sheet C3.0, Dated 4/6/12) CTI Project Name: Figure: Boring Locations CT,� 1348 South Main St Albemarle County- Facilities Figure Number: 1 Blacksburg, VA 24060 Ivy Road Fire Station Date: May, 2012 Charlottesville, Virginia Prepared by: C. Newman CTI Project Number: 11G-1155 Scale: Not to scale CTI Consultants, Incorporated BORING LOG BORING NUMBER: B-1 PROJECT Ivy Fire Station-Permeable Paver Infiltration PROJECT NUMBER 11G-1155 CLIENT Albemarle County-Office of Facilities Developme DATE May 10, 2012 LOCATION Southern End of Paver Area ELEVATION 625 SITE PLAN EXCAVATION METHOD Hand auger LOGGER Rick Love DEPTH TO WATER: N/A WHEN CHECKED: Completion CAVING: N/A EL: Depth: USCS: USDA: USCS DESCRIPTION: 0.25 0.50 FILL N/A Surficial soil and intermingled disturbed residuum along with apparent crushed 0.75 aggregate 624 1.00 1.25 SM LOAM SILTY SAND with gravel,moist,medium-dense, low plastic;brown;some 1.50 mica,blocky gravel(-15%)from granitic parent,blocky sand particles. 1.75 623 2.00 2.25 2.50 2.75 SM LOAM SILTY SAND,moist,dense,low plastic;brown and dark brown;trace mica, 622 3.00 trace subangular gravel from granitic parent,blocky coarse sand particles, 3.25 distinct soil structure. 3.50 3.75 621 4.00 4.25 4.50 4.75 620 5.00 5.25 Boring terminated at 60" 5.50 5.75 619 6.00 6.25 6.50 6.75 618 7.00 7.25 7.50 7.75 617 8.00 8.25 NOTES: Basin elevation = 622 1348 South Main Street Blacksburg, Virginia 540-552-1575 CTI Consultants, Incorporated BORING LOG BORING NUMBER: B-2 PROJECT Ivy Fire Station-Permeable Paver Infiltration PROJECT NUMBER 11G-1155 CLIENT Albemarle County- Office of Facilities Developme DATE May 4, 2012 LOCATION Northern End of Paver Area ELEVATION 623 SITE PLAN EXCAVATION METHOD Hand auger, digging bar,portholes LOGGER Joe Duquette DEPTH TO WATER: N/A WHEN CHECKED: Completion CAVING: N/A EL: Depth: USCS: USDA: USCS DESCRIPTION: 0.25 Three layers of bitumnous asphalt with intermediate layers of dense-graded 0.50 GW N/A aggregate.Appears to have been placed during parking lot overlays and 0.75 extensions. 622 1.00 1.25 SM LOAM SILTY SAND with gravel,moist,medium-dense,low plastic;reddish-brown; 1.50 micaceous,blocky gravel(-20%)from granitic parent,blocky sand particles. 1.75 621 2.00 2.25 SM LOAM SILTY SAND with gravel,borderline dry to moist,dense,low plastic;brownish 2.50 red and dark brown;trace mica,subangular gravel(-15%)from granitic parent, 2.75 blocky coarse sand particles,distinct soil structure. 620 3.00 3.25 3.50 3.75 Becoming gravelly with depth 619 4.00 4.25 4.50 4.75 618 5.00 5.25 Boring terminated at 60" 5.50 5.75 617 6.00 6.25 6.50 6.75 616 7.00 7.25 7.50 7.75 615 8.00 8.25 NOTES: Basin elevation = 620 1348 South Main Street Blacksburg, Virginia 540-552-1575