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WPO201900051 Calculations 2020-04-17
Scottsville Elementary School Addition ALBEMARLE COUNTY, VIRGINIA SCOTTSVILLE DISTRICT DESIGN CALCULATIONS & NARRATIVE WPO 201900051 SEPTEMBER 9, 2019 REVISED DECEMBER 20, 2019 REVISED FEBRUARY 13, 2020 REVISED APRIL 6, 2020 . ••"•� • • • TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OURS. Prepared by:Jonathan Showalter, PE Timmons Group 608 Preston Avenue, Suite 200 Charlottesville, VA 22903 APPROVED 434.327.1681 by the Albemarle County Community Development Department Date LI—L7-to fr \LTHpG File /1/0020L10Uo37 .i i\%THAN'M.SHOWALTER I.Ic. Ao.0402057 t 51 Table of Contents Section Title 1 Project Narrative 2.1 LD-204 Inlet Calculations 2.2 LD-229 Pipe Calculations 2.3 LD-347 Hydraulic Grade Line Analysis 3 Pre and Post Developed HydroCAD Calculations 4 Virginia Runoff Reduction Method Worksheet Summary Project Narrative: This project includes an addition to Scottsville Elementary as well as added site parking, a relocated fire lane, an added bus loop and associated site work. The limits of disturbance is 3.11 acres. Water Quality: The current site contains a school building, modular classrooms, storage sheds, and associated parking lots and roadways. 3.11 acres of disturbed area was analyzed for water quality. The site will require 1.71 lb./year to be treated. The project proposes one Level 1 bioretention facility removing 0.66 lb./year and one Level 2 bioretention facility removing 1.38 lb./year,totaling 2.04 lb./year. A surplus reduction of 0.33 lb./year will be available to be used on future projects owned by the Albemarle County School board, per 9VAC25-870-69 Section A Part 5. Water Quantity: The site drains to an existing dry pond on the north side of the site.Two Bioretention facilities will be added upstream of pond to provide stormwater quality and some stormwater quantity control. The existing dry pond will be expanded to accommodate detain additional runoff from the proposed project in order to meet channel and flood protection requirements. See calculations on plan sheet C6.0 and routing calculations included in this Calculations Book. FORM LD 204 STORMWATER INLET COMPUTATIONS SHEET 1 OF 1 LD204 PROJECT Scottsville Elementary School Addition DESIGNER: A.Mabee DATE 1219/2019 CHECKED: J.Showalter UNITS ENGLISH INLET' J I Sag Inlets Oniv t O a ra F 9g °E g a- 9i 0 t iO1 rf $r ffF a s 7 Z1 it d 0.153 Ill^_ TI-A 4.01111 '0.1711• 0.90 - - - O'RIGHT U.IIU 035 0.0385 0.192 4 0.768 0 0.768 0.0200 0.0578 2.429 2.000 0.8234 0.0833 1.4412 0.994 2.61 0.1088 0.1660 6.062 1 u00 0.660 0.856 0.658 0.110 2.296 402 1)1-311 8.O00 0.080 0.90 0.072 O'RIGHT 0.090 0.35 0.0315 0104 4 0.416 0 0.416 0.0125 0.0244 1.995 2.000 1.0025 0.0833 3.4139 1.000 3.41 0.1422 0.1666 4.060 8.000 1.970 1.000 0.416 0.000 1.995 - _ - _406 01-1 2.000 0.280 0.90 0.252 Back/13. - J 0.000'RIGH 1.060 0.35 0.371 BackN. 0.623 4 2.492 0 Back/1U. O 4 0 0 Ahead/RI. 2.492 0.0100 2.000 2 2.492 4.953 T>8.0 ft 602 01-1 I.250 0070 0.43 0.0301 Back/L3 0.0003LIGIIT 0.03 4 0.12 0 Back/L1. O 4 0 0 Ahead/Rt. 0.120 0.0100 1.250 1.25 0.120 0.805 Weir Flow 604 DTI 1.250 0.150 0.46 0.069 Back/Lt. 0.00011IGHF 01469 4 0.276 0 Back/Lt. O 4 0 0 Ahead/Rt. 0.276 0.0100 1250 1.25 0.276 0.884 Weir Plow 606 D1-I 1.250 0.340 0.48 0.1632 Back/Lt. 0.000'R1GBT 0.163 4 0.652 II Back/Lt. O 4 0 U Ahead/Rt. 0.652 0.0100 1.250 1.25 0.652 2.489 T>8.0 ft INLETSOFT BY ENSOFTEC DATE-.12/19/2019 § ! ! ! ! | 8 ¥ §. ' cn er . § f / 2 11 § � ■ ! § # # ! § | § = cc 0 ■ [ ! § § ! § ! § ■ ( � 2 c § ) I | ; ; ; ; ; ; ■ : § 2 >§| 71 ; ; £ ; R ; @ $ §k$ ; ; ; E ; ; Q ■ § ; 2 §§, ; § ; EE § | | ; g » )� ; ; § fig k ; ; ; ; @1§§] ; ; 111 » k§ 0E( § 2)§ m ; ; | ; | ; ; ; ; ; |§ ( zJ CO CI) S2I ; ; FE & § § 7S ° | } r$ ! ƒ ■ ■ 44 ¥ ■ ■ ■ fa ��§ �� # & a — cq | + ! § # 4 ■ » ■ 4 ¥ 5 |2) ba � � ; ; = , e # - _ - 74 ,;.3 )) it.kg l � a , �- #§ \ § § § g §0• 0000 § kIP: B . . , . . t.r. \ ' !#§ P. ° 2E ; ; A5 ,5 a ( ! | | ! | | | | | ) t_s' 7 � ## BB § § kdkkkB ! ! ( !f | R ; ; « [ ; E ; | {! Ak- a ! Z '73 $\ƒ! k f § @ ; ; § ; § q ; P |/ § { i } } £ ; § § ; ; \ § \| ■` § ; ; GE P E ; ate . ; _. !m • e = , , , .7,8 a; 7 LD-347 PROJECT: Scottsville Elementary School Addition DESIGNED BY: A.Mabee HYDRAULIC GRADE LINE ANALYSIS Checked: J.Showalter INCIDENCE PROBABILITY 10 Year INVERT DEPTH OUTLET DIA. DESIGN LENGTH FRICTION FRICTION JUNCTION LOSS Adl.Ht Inlet Inlet Top of MH INLET STA. EL. OF FLOW WATER PIPE DISCH. PIPE SLOPE,Ste LOSS Contr. Hi(Eepn) SKEW Bend Sum SURFACE 1.3 Shaping, 0.5 FINAL Water Top of Inlet Adlustment° OR OUTFLOW OUTFLOW SURFACE Do Oo Lo (FT/FT) HI Vo Ho Vi V'i 2/29 0.35*MA0. Angle K H HL FLOW HI HI H Surface Elev. JUNCTION PIPE PIPE ELEV. (In/mm) (CFS/CMS) (FUN) (M/M) (RIM) (FUN) (VI2/29) (FAA) (FUN) (FUM) YIN (FUN) (FVM) Elevatron APPROX. (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) , (15) (16) (16) (17) (18) (19) 100 391.900 102 390.240 1.50 391.900 18 7.305 25.36 0.00506 0.128 9.733 0.368 11.707_ 2.128 0.745 0.0 0.00 0.000 1.113 1.185 1.113 YES 0.556 0.685 392.585 398.370 O.K. 104 393.012 1.50 394.212 18 5.712 55.06 0.00309 0.170 11.707 0.532 0.000 0.000 0.000 0.0 0.00 0.000 0.532 0.000 0.532 YES 0.266 0.436 396.796 400.933 O.K. 200 391.700 202 390.273 1.25 391.700 15 6.040 60.22 0.00914 0.550 9.846 0.376 0.000 0.000 0.000 0.0 0.00 0.000 0.376 0.000 0.376 YES 0.188 0.739 393.005 399.405 O.K. 300 _ 400.270 BLDG 399.106 1.25 400.270 15 2.119 48.95 0.00112 0.055 3.689 0.053 0.000 0.000 0.000 0.0 0.00 0.000 0.053 0.000 0.053 YES 0.026 0.081 400.351 403.310 O.K. 400 391.680 402 390.245 1.25 391.680 15 3.637 80.12 0.00331 0.266 9.731 0.368 5.221 0.423 0.148 0.0 0.00 0.000 0.516 0.513 0.516 NO 0.516 0.781 394.601 401.990 O.K. 404 394.280 1.25 395.280 15 3.124 120.03 0.00244 0.293 5.221 0.106 5.587 0.485 0.170 0.0 0.00 0.000 0.275 0.000 0.275 YES 0.138 0.431 396.093 402.910 O.K. 406 395.580 1.25 396.580 15 3.124 14.17 0.00244 0.035 5.587 0.121 0.000 0.000 0.000 0.0 0.00 0.000 0.121 3.124 0.158 YES 0.079 0.113 396.693 400.900 O.K. 600 _ 403.660 602 402.500 1.00 403.660 12 1.583 17.77 0.00206 0.037 4.407 0.075 4.208 0.275 0.096 0.0 0.00 0.000 0.172 0.181 0.172 YES 0.086 0.122 403.782 404.480 O.K. 604 402.770 1.00 403.782 12 1.329 31.78 0.00145 0.046 4.208 0.069 4.141 0.266 0.093 0.0 0.00 0.000 0.162 0.319 0.211 YES 0.105 0.151 403.934 405.510 O.K. 606 403.413 0.67 403.946 8 1.010 98.42 0.00622 0.612 4.141 0.067 0.000 0.000 0.000 0.0 0.00 0.000 0.067 1.010 0.087 NO 0.087 0.699 404.836 408.800 O.K. (' IS Pre SW Facility Draina e Area 2P EX S M Facility 3S Pre Unrouted x 4L Pre Analysis Point 1 Subcat [Reach on. Link, Routing Diagram for Storm Calcs-update 2-12-2020 Prepared by Timmons Group, Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Storm Calcs-update 2-12-2020 Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 2 Area Listing (selected nodes) Area CN Description (acres) (subcatchment-numbers) 2.570 74 >75% Grass cover, Good, HSG C (1 S, 3S) 1.630 98 Paved parking, HSG C (1 S) 0.100 66 Woods, Poor, HSG B (1 S) 4.300 83 TOTAL AREA Storm Calcs-update 2-12-2020 Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 3 Soil Listing (selected nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.100 HSG B 1 S 4.200 HSG C 1 S, 3S 0.000 HSG D 0.000 Other 4.300 TOTAL AREA Storm Calcs-update 2-12-2020 Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 4 Ground Covers (selected nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 2.570 0.000 0.000 2.570 >75% Grass cover, Good 1 S, 3S 0.000 0.000 1.630 0.000 0.000 1.630 Paved parking 1 S 0.000 0.100 0.000 0.000 0.000 0.100 Woods, Poor 1 S 0.000 0.100 4.200 0.000 0.000 4.300 TOTAL AREA Storm Calcs-update 2-12-2020 Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 5 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n DiamAVidth Height Inside-Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 2P 390.05 389.69 53.0 0.0068 0.011 24.0 0.0 0.0 2 2P 390.38 390.05 8.0 0.0412 0.011 12.0 0.0 0.0 Storm Calcs-update 2-12-2020 Type ll 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 6 Time span=0.00-20.00 hrs, dt=0.01 hrs, 2001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS: Pre SWM Facility Runoff Area=4.200 ac 38.81% Impervious Runoff Depth>1.23" Flow Length=375' Tc=19.7 min CN=83 Runoff=6.29 cfs 0.429 af Subcatchment3S: Pre Unrouted Area Runoff Area=0.100 ac 0.00% Impervious Runoff Depth>0.74" Flow Length=375' Tc=19.7 min CN=74 Runoff=0.09 cfs 0.006 af Pond 2P: EX SWM Facility Peak Elev=392.10' Storage=3,181 cf Inflow=6.29 cfs 0.429 af Outflow=4.17 cfs 0.427 af Link 4L: Pre Analysis Point 1 Inflow=4.23 cfs 0.433 af Primary=4.23 cfs 0.433 af Total Runoff Area =4.300 ac Runoff Volume = 0.435 of Average Runoff Depth = 1.21" 62.09% Pervious = 2.670 ac 37.91% Impervious = 1.630 ac Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 1S: Pre SWM Facility Drainage Area Runoff = 6.29 cfs @ 12.13 hrs, Volume= 0.429 af, Depth> 1.23" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 1 YR Rainfall=2.87" Area (ac) CN Description 1.630 98 Paved parking, HSG C 2.470 74 >75% Grass cover, Good, HSG C 0.100 66 Woods, Poor, HSG B 4.200 83 Weighted Average 2.570 61.19% Pervious Area 1.630 38.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 2.4 175 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 19.7 375 Total Subcatchment 1S: Pre SWM Facility Drainage Area Hydrograph 7 0 Runoff` ts 6 Type II 24-hr 1 YR Rainfall=2.87" 5 Runoff Area=4.200 ac i Runoff Volume=0.429 af 4 Runoff Depth>1 .23" Flow Length=375' Tc=19.7 min 2 CN=83 0 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) r\ o co °p o m N N ; II M a Z N MD M Q m L... 0) C d N M (D N O M IN Nt M OO .O m vt ct 00 00 00 N N N 00 U) M N 0 m m r., (D � M N , -. O O O 0 Oo OO OO N N (D (D U) LC) cr ,T M M 0.) >, 04L 00 - 1- NMCD I- W d- c') 00 (DLnU7NI-NtC) MC) Mc') NNNNNNNNNNNe- Q + 7 .O_.000000004 u) N .- O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O I•- U U J M J LL C• ' U) r- N N M ,4- (Om .cr M O LC) m N LI I- m = ) LU (poom O N M .cr tn (D COmm O - N Mv- LI) (D fN N 00m O O - NNM ("1 O OOOOOON (D � � N- mCC CO OOmmmmmm000000000 NNNNNNN O Cl) (j L 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 0 0 0 O X o U) ` w .c 2 a m l- 04r- N0000 V ON- OMOON _Ln00 01 141 N- CD _ MU1I� 000c- M4Lf) (D00m0 _ NMNtLnmr- 0m0 NCV01 N Qc" 1.0 (D (D (0NN 00N m O O N- c- N N N co M MM MttNI- ,rNI- ,r LDU) U7 up up up Ln up (o (0 CD UD co 6OD QD (0 QD I"- � NNN O • U 0 0 0 0 0 0 0 ,- ,- N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N C tZ O d U E � ).0 0 0 0 0 0 0 0 O O 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 0 0 0 0 0 0 0 0 O (D o0 O N (D O O N V (D W O N (D 00 O N N:t (D OO O N NT (D N O N d- (O 00 O N tt (D O0 O N V' (D OO O N V (O OO O 2 V 00 000 NNNNNMMMM06444 4 4uiu6u66ui66666r-: I� r- 1.� f, 6006666mmm66 N I V O m M N N o �' C 0 0 0 0 0 0 0 0 0000 0 000000000000000000000000 0 0 0 0 0 00 0 0 0 0 N 0 0 O N O 0 7 ......0000000000000000000000000000000000000000000000000000 N I?(,,) Cr N1 LO o a CJ O i 0 to 0 0) U) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 O 0 0 0 0 0 0 0 0 C - O U O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O CO a. () .0 O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O U7 X U Q. E N >, w .c 7 Eo 2 0 H O• QN O - - NNM � 4Ln (O (DI- NOOmO - - NMv- L0 ,0 (or- mmO - NM � LocoNmo - Nmv- wr- mON � (D000N � V 0 .0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N N N N N N N N M M cM M M M M M V' of Nt ' Nt Ln LO Lf) - �' O U O O O O O co O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O V Do w EAU 0 0000000000000000000000000000000000000000000000000000 L 0- 2 E N ONNt (0MONNt (DOOONNt (DOOONNt (DOOON � (DOOON � (DOOONNT (DOOONNtOMON V' (DMONNt (DOOON O w '0 8 00000 N N N N N M M M M C) 4 Ni4 4- 46 LD LU L(U LC) (D (D (D (D 6 N N N N- N- m 6 6 6 60) 0) 0) 0) 0) 00 W d I Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 3S: Pre Unrouted Area Runoff = 0.09 cfs @ 12.14 hrs, Volume= 0.006 af, Depth> 0.74" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 1 YR Rainfall=2.87" Area (ac) CN Description 0.000 98 Paved parking, HSG C 0.100 74 >75% Grass cover, Good, HSG C 0.100 74 Weighted Average 0.100 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 2.4 175 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 19.7 375 Total Subcatchment 3S: Pre Unrouted Area Hydrograph 0.095 ❑Runoff 0.09= 09 efs 0.085 Type if 24-h r 0.08- 0.075 . YR Rainfall=2.8 ' 0 07- - -Runoff Area=0.100 ac 0.065 Runoff Volume=0.006 af • 0.055- 0.05 RuRunoffDepth>0.74" LL 0045 Flow Length=375' 0.04' A 0.0354 -JT ci=49.7 min �r 0.0251 �CN:74�_ 0.02 0.015i 0.005=' 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 00'0 00'0 t9'0 OZ.()1 00'0 00'0 Z9'0 00'01 00'0 00'0 09'0 08'6 00'0 bl'0 £L'Z 00'0Z 00'0 00'0 81'0 09'6 00'0 11L'0 ZL'Z 08'61 00'0 00'0 9W'0 017'6 00'0 EL'0 ZL'Z 09'61 00'0 00'0 11'0 OZ'6 00'0 Et() LL'Z 01'61 00'0 00'0 Zb'0 00'6 00'0 ZL'0 OL'Z Ot61 00'0 00'0 017'0 08'9 00'0 ZL'0 69'Z 00.61 00'0 00'0 6£'0 09.8 00'0 LL'0 89'Z 08'91 00'0 00'0 L£'0 017'8 00'0 1L'0 L9'Z 09'81 00'0 00'0 9E'0 On 00'0 OL'O 99'Z 01'81 00'0 00'0 11£'0 00'8 00'0 OL'O 997 OZ181. 00'0 00'0 MO 081 00'0 69'0 19'Z 00'81 00'0 00'0 Z£'0 09'L 00'0 89'0 £9'Z 0811, 00'0 00'0 1£'0 OVL 00'0 89'0 Z97 0911 00'0 00'0 0E'0 OZ'L 00'0 L9'0 197 Ot1'L L 00'0 00'0 8Z'0 001 00'0 L9'0 097 OZ'LL 00'0 00'0 LZ'0 08'9 00'0 99'0 69'Z 0011. 00'0 00'0 9Z'0 09'9 00'0 99'0 89'Z 08'91 00'0 00'0 9Z'0 017'9 00'0 179'0 99'Z 09'91 00'0 00'0 t7Z'0 0Z'9 00'0 19'0 997 017'91. 00'0 00'0 £Z'0 00'9 00'0 £9'0 179'Z 0Z'91 00'0 00'0 ZZ'0 08'9 00'0 Z9'0 £9'Z 00'91 00'0 00'0 2'0 09'9 00'0 Z9'0 197 08'91 00'0 00'0 0Z'0 01'9 00'0 1.9'0 09'Z 09'91 00'0 00'0 61'0 0Z'9 00'0 09'0 9t1Z 01'91 00'0 00'0 81'0 00'9 00'0 69'0 2.17 OZ'91 00'0 00'0 L 1'0 0817 10'0 89'0 917 00'91 00'0 00'0 91'0 09'1 10'0 L9'0 E1'Z 08171 00'0 00'0 91'0 0b17 10'0 99'0 LYZ 09171 00'0 00'0 91.'0 0Z1' 10'0 99'0 6E'Z 01171 00'0 00'0 111'0 0017 10'0 179'0 LE'Z OZ'PL 00'0 00'0 £1'0 08'E 10'0 £9'0 9E'Z 00171 00'0 00'0 Z1'0 09'£ 10'0 Z9'0 ££'Z 08'£1 00'0 00'0 11'0 01'E 10'0 09'0 L£'? 09'£1 00'0 00'0 11'0 OZ'£ 10'0 6110 8Z7 01'£1 00'0 00'0 01'0 00'£ 10'0 L17'0 9Z7 OZ'£1 00'0 00'0 60'0 08'Z 10'0 9b'0 ZZ'Z 00'£1 00'0 00'0 80'0 097 10'0 117'0 8L'Z 08'Z1 00'0 00'0 80'0 01'Z ZO'O 11'0 £L'Z 09'Z1 00'0 00'0 L0'0 OZ'Z 10'0 6£'0 807 011'Z1. 00'0 00'0 90'0 007 80'0 9£'0 1.07 0Z7 1 00'0 00'0 90'0 08.1 90'0 1.£'0 06'L 00'Z 1 00'0 00'0 90'0 09'1 10'0 LO'0 PPZ'1 08'L 1 00'0 00'0 170'0 017'L 00'0 10'0 89'0 09'L 1 00'0 00'0 170'0 0Z'1 00'0 00'0 8L'0 01'11 00'0 00'0 £0'O 00'L 00'0 00'0 ZL'0 0Z'1 l 00'0 00'0 ZO'O 08'0 00'0 00'0 L9'0 00'11 00'0 00'0 Z0'0 09'0 00'0 00'0 19'0 09'01 00'0 00'0 1.0'0 011'0 00'0 00'0 09'0 09'01 00'0 00'0 1.0'0 0Z'0 00'0 00'0 L9'0 017'01 00'0 00'0 00'0 00'0 (sp) (sayoui) (sayouw) (sJnoy) (sp) (sayouw) (sa pui) (smog) }toun*j ssaox .dioaid awil jouna SS33X •dioaJd awil said pa;noaun aid :s£ ;uauayo;eogns ao; gdea6oapAH 01. abed all suoi;nIog aJennUOS aYOOJPAH 6 L0Z 0 £9980 u/s 9Z-00.01 ®OVOOJPAH 0Z0Z/C L/Z Paluiad dnaio suowwil Aq paaedaad „L8.Z=lleiU1eel e/A d a4-bZ ll adAl OZOZ-Z 1.-Z a;epdn-soled wao;s Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Paqe 11 Summary for Pond 2P: EX SWM Facility [44] Hint: Outlet device#3 is below defined storage Inflow Area = 4.200 ac, 38.81% Impervious, Inflow Depth > 1.23" for 1 YR event Inflow = 6.29 cfs @ 12.13 hrs, Volume= 0.429 af Outflow = 4.17 cfs @ 12.27 hrs, Volume= 0.427 af, Atten= 34%, Lag= 8.8 min Primary = 4.17 cfs @ 12.27 hrs, Volume= 0.427 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs/3 Peak Elev= 392.10'@ 12.27 hrs Surf.Area= 2,488 sf Storage= 3,181 cf Plug-Flow detention time= 11.6 min calculated for 0.427 af(100% of inflow) Center-of-Mass det. time=9.7 min ( 811.6 - 801.8 ) Volume Invert Avail.Storage Storage Description #1 390.50' 15,349 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 390.50 1,556 0 0 391.00 1,802 840 840 392.00 2,409 2,106 2,945 393.00 3,226 2,818 5,763 394.00 4,794 4,010 9,773 395.00 6,358 5,576 15,349 Device Routing Invert Outlet Devices #1 Primary 390.05' 24.0" Round Culvert L= 53.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 390.05'/389.69' S= 0.0068 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight&clean, Flow Area= 3.14 sf #2 Device 1 392.90' 24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 390.38' 12.0" Round Culvert L= 8.0' RCP, square edge headwall, Ke= 0.500 Inlet/ Outlet Invert= 390.38'/ 390.05' S= 0.0412 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight& clean, Flow Area= 0.79 sf Primary OutFlow Max=4.17 cfs @ 12.27 hrs HW=392.10' (Free Discharge) 4-1=Culvert (Passes 4.17 cfs of 14.19 cfs potential flow) t2=Orifice/Grate ( Controls 0.00 cfs) 3=Culvert (Inlet Controls 4.17 cfs @ 5.31 fps) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 12 Pond 2P: EX SWM Facility Hydrograph / •Inflow 8.29 cfs I e Primary Inflow Area=4.200 ac 6 Peak Elev=392.10' 5 Storage=3,181 cf 14.17 cfs in 4 ' o LL gj 2, 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 2P: EX SWM Facility Stage-Discharge 395 / •Primary` 394 ` 393 Orifice/Grate c 0 IS d w 392 391 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 13 Pond 2P: EX SWM Facility Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500 6,000 ❑Surface _■Storage 395 / 394 ////// ////f/ cz m , u w • 0 -- 393 ,I c .mo p Lap 392 I I A , A I A I I I i fl 391 Custom Sage Data / 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type ll 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 14 Hydrograph for Pond 2P: EX SWM Facility Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 390.50 0.00 0.50 0.00 0 390.50 0.00 1.00 0.00 0 390.50 0.00 1.50 0.00 0 390.50 0.00 2.00 0.00 0 390.50 0.00 2.50 0.00 0 390.50 0.00 3.00 0.00 0 390.50 0.00 3.50 0.00 0 390.50 0.00 4.00 0.00 0 390.50 0.00 4.50 0.00 0 390.50 0.00 5.00 0.00 0 390.50 0.00 5.50 0.00 0 390.50 0.00 6.00 0.00 0 390.50 0.00 6.50 0.00 0 390.50 0.00 7.00 0.00 0 390.50 0.00 7.50 0.00 0 390.50 0.00 8.00 0.00 0 390.50 0.00 8.50 0.00 0 390.50 0.00 9.00 0.00 0 390.50 0.00 9.50 0.01 4 390.50 0.01 10.00 0.03 14 390.51 0.02 10.50 0.07 32 390.52 0.05 11.00 0.13 63 390.54 0.11 11.50 0.28 149 390.59 0.20 12.00 4.14 1,186 391.19 2.08 12.50 1.76 2,215 391.68 3.39 13.00 0.68 617 390.87 0.93 13.50 0.49 405 390.75 0.55 14.00 0.38 323 390.70 0.42 14.50 0.32 268 390.67 0.34 15.00 0.29 239 390.65 0.30 15.50 0.26 216 390.64 0.27 16.00 0.23 192 390.62 0.25 16.50 0.21 169 390.61 0.22 17.00 0.20 156 390.60 0.20 17.50 0.19 146 390.59 0.19 18.00 0.18 136 390.59 0.18 18.50 0.16 125 390.58 0.17 19.00 0.15 114 390.57 0.16 19.50 0.14 102 390.56 0.15 20.00 0.13 91 390.56 0.14 Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 15 Stage-Discharge for Pond 2P: EX SWM Facility Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 390.50 0.00 393.10 7.97 390.55 0.12 393.15 8.97 390.60 0.20 393.20 10.06 390.65 0.30 393.25 11.24 390.70 0.42 393.30 12.50 390.75 0.55 393.35 13.84 390.80 0.69 393.40 15.25 390.85 0.85 393.45 16.73 390.90 1.01 393.50 18.28 390.95 1.19 393.55 19.89 391.00 1.37 393.60 21.56 391.05 1.56 393.65 22.97 391.10 1.75 393.70 23.58 391.15 1.94 393.75 24.16 391.20 2.13 393.80 24.73 391.25 2.30 393.85 25.29 391.30 2.47 393.90 25.54 391.35 2.61 393.95 25.76 391.40 2.73 394.00 25.98 391.45 2.86 394.05 26.20 391.50 2.98 394.10 26.42 391.55 3.10 394.15 26.63 391.60 3.21 394.20 26.85 391.65 3.32 394.25 27.06 391.70 3.42 394.30 27.27 391.75 3.53 394.35 27.48 391.80 3.63 394.40 27.69 391.85 3.72 394.45 27.89 391.90 3.82 394.50 28.10 391.95 3.91 394.55 28.30 392.00 4.00 394.60 28.50 392.05 4.09 394.65 28.70 392.10 4.18 394.70 28.90 392.15 4.26 394.75 29.10 392.20 4.34 394.80 29.29 392.25 4.43 394.85 29.49 392.30 4.51 394.90 29.68 392.35 4.59 394.95 29.87 392.40 4.66 395.00 30.06 392.45 4.74 392.50 4.81 392.55 4.89 392.60 4.96 392.65 5.03 392.70 5.10 392.75 5.17 392.80 5.24 392.85 5.31 392.90 5.37 392.95 5.73 393.00 6.33 393.05 7.09 Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 16 Stage-Area-Storage for Pond 2P: EX SWM Facility Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 390.50 1,556 0 393.10 3,383 6,093 390.55 1,581 78 393.15 3,461 6,264 390.60 1,605 158 393.20 3,540 6,439 390.65 1,630 239 393.25 3,618 6,618 390.70 1,654 321 393.30 3,696 6,801 390.75 1,679 404 393.35 3,775 6,988 390.80 1,704 489 393.40 3,853 7,178 390.85 1,728 575 393.45 3,932 7,373 390.90 1,753 662 393.50 4,010 7,572 390.95 1,777 750 393.55 4,088 7,774 391.00 1,802 840 393.60 4,167 7,980 391.05 1,832 930 393.65 4,245 8,191 391.10 1,863 1,023 393.70 4,324 8,405 391.15 1,893 1,117 393.75 4,402 8,623 391.20 1,923 1,212 393.80 4,480 8,845 391.25 1,954 1,309 393.85 4,559 9,071 391.30 1,984 1,407 393.90 4,637 9,301 391.35 2,014 1,507 393.95 4,716 9,535 391.40 2,045 1,609 394.00 4,794 9,773 391.45 2,075 1,712 394.05 4,872 10,014 391.50 2,106 1,816 394.10 4,950 10,260 391.55 2,136 1,922 394.15 5,029 10,509 391.60 2,166 2,030 394.20 5,107 10,763 391.65 2,197 2,139 394.25 5,185 11,020 391.70 2,227 2,250 394.30 5,263 11,281 391.75 2,257 2,362 394.35 5,341 11,546 391.80 2,288 2,475 394.40 5,420 11,815 391.85 2,318 2,590 394.45 5,498 12,088 391.90 2,348 2,707 394.50 5,576 12,365 391.95 2,379 2,825 394.55 5,654 12,646 392.00 2,409 2,945 394.60 5,732 12,930 392.05 2,450 3,066 394.65 5,811 13,219 392.10 2,491 3,190 394.70 5,889 13,511 392.15 2,532 3,316 394.75 5,967 13,808 392.20 2,572 3,443 394.80 6,045 14,108 392.25 2,613 3,573 394.85 6,123 14,412 392.30 2,654 3,704 394.90 6,202 14,721 392.35 2,695 3,838 394.95 6,280 15,033 392.40 2,736 3,974 395.00 6,358 15,349 392.45 2,777 4,112 392.50 2,818 4,252 392.55 2,858 4,394 392.60 2,899 4,537 392.65 2,940 4,683 392.70 2,981 4,831 392.75 3,022 4,982 392.80 3,063 5,134 392.85 3,103 5,288 392.90 3,144 5,444 392.95 3,185 5,602 393.00 3,226 5,763 393.05 3,304 5,926 Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 17 Summary for Link 4L: Pre Analysis Point 1 Inflow Area = 4.300 ac, 37.91% Impervious, Inflow Depth > 1.21" for 1 YR event Inflow = 4.23 cfs @ 12.27 hrs, Volume= 0.433 af Primary = 4.23 cfs @ 12.27 hrs, Volume= 0.433 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Link 4L: Pre Analysis Point 1 Hydrograph ■Inflow ` .za ■Primary 1 Inflow Area=4.300 ac 14.23 c� 4 3 u 0 0 LL 2_ 0- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) j., o 00 03 SeNCjl T- N M (0 '- NC C Cr CD 03 ID > C) v- a.,..--,(nCD00 — MNC)NN0NON ONNM0) (0 N — OCON- D6f)( Nr M N . N .-- CDCD0) O N- N- U) U CT) NC O.) 0 0 0 ,- ,- .- N Nt e- O) 00 (n 0) f-- (D (n CO N) M M M M N N N N N N N N N N N ,� E 0 0 0 0 0 0 0 0 N ("� N '— 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N e- Q. C QQ. 0 c -----0000000000000000000000000000000000000000000000000 u, 0oo0000000000000000000000000000000000000000000000 I— U H o"= a) 0000000000000000000000000000000000000000000000000 —_I UT >`. — y >+ CD C cti o C 3 COOO MNMN- NONON ON N- MO) CO N 000N- CD LO Nt MN 000) 0) COOOOON- N- CO (O j < p w co co 0 ,- N ,- e- 0) CO Lo O) N CD Nt Nt M M M M M M N N N N N N N N N N N (p V C O O o 0 0 0 0 o N 4 ri N ,- 0 0 0 0 0 0 06 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - EL, a O Y N N 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Co 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0) E rz st (DCOONNt CD. OOO (NI 4 (DCO0N NI- (DCDONNt (DCOON NTCDo00N 'CT CD000NNT CD 000N NI- CDa00NNT (D000 QC - L 000 NNNNNMMMMMN7Nt � � 'q66 (O (O6 (O(O (O (O (DN- N- N- NNCD000000ODO0000N U o• 1O v I C. w o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O CT) L E.E 0 0 0 0 0 0 0 0 00 0 00 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 000 0 000 p N 0 a N Q -0 N a co >+ e- co I c «o000000000000000000000000000000000000000000000000000 ( O` CD o N O O O O O O O O O O O O O O O O O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Nro 'M - 0000000000000000000000000000000000000000000000000000 R y c a, w O 0. E N N CD CD CD 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N M ( E O p w 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Ni0 �0000000000000000000000000000000000000000000000000000 v >,o _ iC E (p6 a,^0oo0000000000000000000000000000000000000000000000000 L a 0 E N ON CD COCDNNT (D CO. ON � (OCOON � (DCOONNC (DCOONNtCDCDON � CDCOCDN �7CDCDONNT (DCOCDN ' CDCOCDN 0 () "0O - 0 00000 NNNNNMMMC') C) 4444LL) (liUU) (AU) (DCDCDCDCpN- N- N- NN- (0(0000DCO0) O) O) 0) Cn00 N 0_ 2 Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 19 Time span=0.00-20.00 hrs, dt=0.01 hrs, 2001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method SubcatchmentlS: Pre SWM Facility Runoff Area=4.200 ac 38.81% Impervious Runoff Depth>3.15" Flow Length=375' Tc=19.7 min CN=83 Runoff=15.94 cfs 1.104 af Subcatchment3S: Pre Unrouted Area Runoff Area=0.100 ac 0.00% Impervious Runoff Depth>2.35" Flow Length=375' Tc=19.7 min CN=74 Runoff=0.29 cfs 0.020 af Pond 2P: EX SWM Facility Peak Elev=393.38' Storage=7,106 cf Inflow=15.94 cfs 1.104 of Outflow=14.72 cfs 1.098 af Link 4L: Pre Analysis Point 1 Inflow=14.98 cfs 1.118 af Primary=14.98 cfs 1.118 of Total Runoff Area = 4.300 ac Runoff Volume = 1.123 af Average Runoff Depth = 3.13" 62.09% Pervious = 2.670 ac 37.91% Impervious = 1.630 ac Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 20 Summary for Subcatchment 1S: Pre SWM Facility Drainage Area Runoff = 15.94 cfs @ 12.12 hrs, Volume= 1.104 af, Depth> 3.15" Runoff by SCS TR-20 method. UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 10 YR Rainfall=5.25" Area (ac) CN Description 1.630 98 Paved parking, HSG C 2.470 74 >75% Grass cover, Good, HSG C 0.100 66 Woods, Poor, HSG B 4.200 83 Weighted Average 2.570 61.19% Pervious Area 1.630 38.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 2.4 175 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 19.7 375 Total Subcatchment 1S: Pre SWM Facility Drainage Area Hydrograph � j ❑17= Runoff - 115 94 cfs I 16- - Type II 24-hr 15= _10 YR Rainfall=5.25" 13_ Runoff Area=4.200 ac 12 _ 11= Runoff Volume=1.104 af - Runoff Depth>3.15" 9= 0/ LL Flow Length=375' Tc=19.7 min67. CN=83 4= 2 ,= 777/ 0 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 21 Hydrograph for Subcatchment 1S: Pre SWM Facility Drainage Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 1.04 0.15 0.36 0.20 0.01 0.00 0.00 10.60 1.10 0.17 0.43 0.40 0.02 0.00 0.00 10.80 1.16 0.20 0.50 0.60 0.03 0.00 0.00 11.00 1.23 0.24 0.61 0.80 0.04 0.00 0.00 11.20 1.32 0.28 0.73 1.00 0.06 0.00 0.00 11.40 1.43 0.34 0.93 1.20 0.07 0.00 0.00 11.60 1.61 0.44 1.23 1.40 0.08 0.00 0.00 11.80 2.26 0.88 3.20 1.60 0.09 0.00 0.00 12.00 3.48 1.84 11.28 1.80 0.10 0.00 0.00 12.20 3.67 2.00 13.84 2.00 0.12 0.00 0.00 12.40 3.81 2.12 5.82 2.20 0.13 0.00 0.00 12.60 3.90 2.20 3.09 2.40 0.14 0.00 0.00 12.80 3.98 2.27 1.98 2.60 0.15 0.00 0.00 13.00 4.05 2.33 1.53 2.80 0.17 0.00 0.00 13.20 4.11 2.39 1.30 3.00 0.18 0.00 0.00 13.40 4.17 2.43 1.14 3.20 0.19 0.00 0.00 13.60 4.22 2.48 1.03 3.40 0.21 0.00 0.00 13.80 4.26 2.52 0.93 3.60 0.22 0.00 0.00 14.00 4.31 2.55 0.84 3.80 0.24 0.00 0.00 14.20 4.34 2.59 0.77 4.00 0.25 0.00 0.00 14.40 4.38 2.62 0.72 4.20 0.27 0.00 0.00 14.60 4.41 2.65 0.69 4.40 0.28 0.00 0.00 14.80 4.45 2.68 0.66 4.60 0.30 0.00 0.00 15.00 4.48 2.71 0.63 4.80 0.31 0.00 0.00 15.20 4.51 2.74 0.61 5.00 0.33 0.00 0.00 15.40 4.54 2.76 0.58 5.20 0.35 0.00 0.00 15.60 4.57 2.79 0.55 5.40 0.37 0.00 0.00 15.80 4.60 2.81 0.53 5.60 0.38 0.00 0.00 16.00 4.62 2.83 0.50 5.80 0.40 0.00 0.00 16.20 4.64 2.85 0.47 6.00 0.42 0.00 0.00 16.40 4.67 2.87 0.45 6.20 0.44 0.00 0.00 16.60 4.69 2.90 0.44 6.40 0.46 0.00 0.01 16.80 4.71 2.92 0.43 6.60 0.48 0.00 0.02 17.00 4.73 2.93 0.42 6.80 0.50 0.00 0.02 17.20 4.76 2.95 0.41 7.00 0.52 0.01 0.03 17.40 4.78 2.97 0.40 7.20 0.54 0.01 0.04 17.60 4.80 2.99 0.39 7.40 0.56 0.01 0.05 17.80 4,82 3.01 0.38 7.60 0.58 0.01 0.06 18.00 4.84 3.03 0.37 7.80 0.61 0.02 0.07 18.20 4.85 3.04 0.37 8.00 0.63 0.02 0.08 18.40 4.87 3.06 0.36 8.20 0.65 0.03 0.09 18.60 4.89 3.07 0.35 8.40 0.68 0.03 0.10 18.80 4.91 3.09 0.34 8.60 0.71 0.04 0.12 19.00 4.92 3.10 0.33 8.80 0.74 0.05 0.14 19.20 4.94 3.12 0.32 9.00 0.77 0.05 0.16 19.40 4.95 3.13 0.31 9.20 0.81 0.06 0.18 19.60 4.97 3.15 0.30 9.40 0.84 0.07 0.20 19.80 4.98 3.16 0.29 9.60 0.87 0.09 0.22 20.00 5.00 3.17 0.28 9.80 0.91 0.10 0.24 10.00 0.95 0.11 0.27 10.20 0.99 0.13 0.31 Storm Calcs-update 2-12-2020 Type ll 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 22 Summary for Subcatchment 3S: Pre Unrouted Area Runoff = 0.29 cfs @ 12.13 hrs, Volume= 0.020 af, Depth> 2.35" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 10 YR Rainfall=5.25" Area (ac) CN Description 0.000 98 Paved parking, HSG C 0.100 74 >75% Grass cover, Good, HSG C 0.100 74 Weighted Average 0.100 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 2.4 175 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 19.7 375 Total Subcatchment 3S: Pre Unrouted Area Hydrograph 0.32 / ❑Runoff 0.3 i029OsJ 0.28 Type 1124-h r 0.26 10-YR Rainfall=5.25" 0.24 0.22 Runoff Area=0.100 ac 0.2 Runoff Volume=0.020 af �� 018 Runoff Depth>2.35" �� 0.16 0.14 Flow Length=375' 0.12 Tc=19.7 min 01 0.08 CN=74 0.06 ' % 0-04 - - 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 00'0 ZOO 66.0 OZ'o l 00'0 Z0'0 96'0 00'0l 00'0 10'0 l6'0 08'6 l0'0 9£7 00'S 00'0Z 00'0 10'0 L9'0 09'6 l0'0 SE'Z 86 b 09'61 00'0 10'0 V9'0 O17'6 l0'0 KZ L6'V 09'61. 00'0 00'0 l8'0 OZ'6 10'0 ££'Z 96'V Ob'6l 00.0 00'0 LEO 00'6 10'0 Z£'Z 176'V OZ'61 00'0 00'0 PLO 08'8 [0'0 0£'Z Z6'V 00'6l 00'0 00'0 1L'O 09'9 10'0 6Z'Z 1617 08'91 00'0 00.0 99'0 0P'8 l0'0 8Z'Z 68'V 09'81 00'0 00'0 99'0 OZ'9 1.0'0 9Z7 L8'1 01'81 00'0 00'0 £9'0 00'8 10'0 SZ'Z 9817 OZ'8l 00'0 00'0 l9'0 081 l0'0 £Z"Z V917 00'81 00'0 00'0 89'0 OWL 10'0 ZZ'Z Z817 0911. 00'0 00'0 99'0 011 l0'O OZ'Z 0917 0911 00'0 00'0 PS'0 OZ'L l0'0 61'Z 8L'1' O1'L1 00'0 00'0 ZS'0 00'L l0'0 L1'Z 9L17 OZ'L1 00'0 00'0 09'0 08'9 l0'0 Sl'Z £L'P 001l 00'0 00'0 817'O 09'9 10'0 11'Z 1L17 08'91 00'0 00'0 WO 0P'9 10'0 Z l'Z 6917 09'91 00'0 00'0 tib'0 OZ.9 10'0 O1'Z L917 OV'91. 00'0 00'0 Z1'0 00'9 1.0'0 80'Z 1917 OZ'91 00'0 00'0 0.'0 08'9 l0'0 LO'Z Z917 00'9l 00'0 00'0 8E'0 09'9 l0'0 90'Z 0917 08'91 00'0 00'0 LE'O Ob'9 10'0 EO'Z L917 09'9l 00'0 00'0 9E1) OZ'S [0'0 002 VS'b 01'S 1 00'0 00'0 MO 00'9 10'0 86'l 1917 OZ'9l 00'0 00'0 1£'0 0817 10'0 96'1 81717 00'91. 00'0 00'0 OE'0 0917 10'0 £6'l 9P17 08171. 00'0 00'0 8Z'0 0117 l0'0 16'l 11717 09171, 00'0 00'0 LZ'0 OZ'b 10'0 98'L 8E17 0P1P1 00'0 00'0 9Z'0 0017 ZOO 98'l VE17 OZ'bl 00'0 00'0 1'Z'0 08'E ZOO Z9'1, [El? 00171 00'0 00'0 ZZ'0 09'£ ZOO 6L'1 9Z17 08'EL 00'0 00'0 1Z'0 WE ZOO 9L'1 ZZ'b 09'£l 00'0 00'0 61'0 OZ'£ ZOO ZL'l L l'1' WE I. 00'0 00'0 91.'0 00'£ £0'0 99'1 1 l'V OZ'£l 00'0 00'0 L 1'0 087 £0'0 P9'l 9017 00'£1 00'0 00'0 9l'0 09'Z P0'0 89'l 86'E 09'Z1 00'0 00'0 V1'0 01'Z 90'0 £S 1 06'£ 0971. 00'0 00'0 £l'0 OZZ 11'0 9t7'1 18'E OV'Z 1 00'0 00'0 Z 1'0 00'Z SZ'0 9E'l L9£ OZ'Z 1 00'0 00'0 01'0 09'1 61'0 £Z'l 8ti£ 00'Z I. 00'0 00'0 60'0 09'1 90'0 WO 9Z7 09'1 l 00'0 00'0 90'0 Oti'l ZO'O 6 VO 1.9'1 09'1 l 00'0 00'0 LO'0 OZ'1 [0'0 Z 1'0 £b'I. 017'L l 00'0 00'0 90'0 00'l l0'0 60'0 Z£'L OZ'11 00'0 00'0 P0'0 09'0 10'0 LO'0 £Z'I. 00'l l 00'0 00'0 £0'0 09'0 l0'0 90'0 91'l 08'01. 00'0 00'0 ZO'O WO 00'0 b0'O 01'1 09'01 00'0 00'0 10'0 OZ'O 00'0 £0'0 P0'l WO 1 00'0 00'0 00'0 00'0 (sjo) (sayoui) (sayoui) (s.noy) (sp) (sayoui) (sayoui) (sinoy) jjounb ssa3x3 .dioaid awil mound ssaox3 -dioaJd aLuil eery pamoiun aid :s£ wawq ieagns aoj gdeJ6oJpAH CZ abed 011 suoi3nps aJenryjOS ad3OJPAH 61.OZ O £9980 u/s 9Z-00'0l®ab'aoJPAH OZOZ/E l/Z pajuud dnoio suowwil /(q paJedaad „gZ S=11ejulej ea OL i4-17Z 11 adAl OZOZ-Z6-Z alepdn-s3Ie3 wioig Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 24 Summary for Pond 2P: EX SWM Facility [44] Hint: Outlet device#3 is below defined storage Inflow Area = 4.200 ac, 38.81% Impervious, Inflow Depth > 3.15" for 10 YR event Inflow = 15.94 cfs @ 12.12 hrs, Volume= 1.104 of Outflow = 14.72 cfs @ 12.18 hrs, Volume= 1.098 af, Atten= 8%, Lag= 3.7 min Primary = 14.72 cfs @ 12.18 hrs, Volume= 1.098 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs/3 Peak Elev= 393.38'@ 12.18 hrs Surf.Area= 3,824 sf Storage= 7,106 cf Plug-Flow detention time= 11.7 min calculated for 1.098 af(100% of inflow) Center-of-Mass det. time=9.7 min ( 791.1 - 781.4 ) Volume Invert Avail.Storage Storage Description #1 390.50' 15,349 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 390.50 1,556 0 0 391.00 1,802 840 840 392.00 2,409 2,106 2,945 393.00 3,226 2,818 5,763 394.00 4,794 4,010 9,773 395.00 6,358 5,576 15,349 Device Routing Invert Outlet Devices #1 Primary 390.05' 24.0" Round Culvert L= 53.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 390.05'/389.69' S= 0.0068'/' Cc= 0.900 n= 0.011 Concrete pipe, straight&clean, Flow Area= 3.14 sf #2 Device 1 392.90' 24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 390.38' 12.0" Round Culvert L= 8.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 390.38'/390.05' S= 0.0412 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight&clean, Flow Area= 0.79 sf Primary OutFlow Max=14.71 cfs @ 12.18 hrs HW=393.38' (Free Discharge) L1=Culvert (Passes 14.71 cfs of 23.10 cfs potential flow) '2=Orifice/Grate (Weir Controls 8.73 cfs @ 2.27 fps) 3=Culvert (Inlet Controls 5.98 cfs @ 7.61 fps) Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 25 Pond 2P: EX SWM Facility Hydrograph / ■Inflow 1594 cfs ■Prmary17 Inflow Area=4.200 ac I 14.72 cfs 15 Peak Elev=393.38' 14 13 Storage=7,106 cf 12 11 .! 10 9- 8 LL 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 2P: EX SWM Facility Stage-Discharge 395 1 •Primary 394 t 393- c 0 a d w 392- 391 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 26 Pond 2P: EX SWM Facility Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500 6,000 0 Surface ■Storage 395 ,i/ 394 n 01 I I I II w u 393 C I I i I 0 I e w 392 I I I 'I I II I I I Y I I I I II I 391 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 27 Hydrograph for Pond 2P: EX SWM Facility Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 390.50 0.00 0.50 0.00 0 390.50 0.00 1.00 0.00 0 390.50 0.00 1.50 0.00 0 390.50 0.00 2.00 0.00 0 390.50 0.00 2.50 0.00 0 390.50 0.00 3.00 0.00 0 390.50 0.00 3.50 0.00 0 390.50 0.00 4.00 0.00 0 390.50 0.00 4.50 0.00 0 390.50 0.00 5.00 0.00 0 390.50 0.00 5.50 0.00 0 390.50 0.00 6.00 0.00 0 390.50 0.00 6.50 0.01 4 390.50 0.01 7.00 0.03 15 390.51 0.02 7.50 0.05 27 390.52 0.05 8.00 0.08 41 390.53 0.07 8.50 0.11 58 390.54 0.10 9.00 0.16 89 390.56 0.14 9.50 0.21 139 390.59 0.18 10.00 0.27 185 390.62 0.24 10.50 0.39 265 390.67 0.34 11.00 0.61 388 390.74 0.52 11.50 1.06 599 390.86 0.89 12.00 11.28 3,564 392.25 4.42 12.50 4.13 5,483 392.91 5.45 13.00 1.53 1.876 391.53 3.04 13.50 1.08 771 390.96 1.23 14.00 0.84 607 390.87 0.91 14.50 0.70 514 390.81 0.74 15.00 0.63 468 390.79 0.66 15.50 0.57 429 390.76 0.59 16.00 0.50 388 390.74 0.52 16.50 0.45 351 390.72 0.46 17.00 0.42 331 390.71 0.43 17.50 0.40 314 390.70 0.41 18.00 0.37 298 390.69 0.38 18.50 0.35 281 390.68 0.36 19.00 0.33 263 390.66 0.34 19.50 0.30 245 390.65 0.31 20.00 0.28 226 390.64 0.29 Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 28 Stage-Discharge for Pond 2P: EX SWM Facility Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 390.50 0.00 393.10 7.97 390.55 0.12 393.15 8.97 390.60 0.20 393.20 10.06 390.65 0.30 393.25 11.24 390.70 0.42 393.30 12.50 390.75 0.55 393.35 13.84 390.80 0.69 393.40 15.25 390.85 0.85 393.45 16.73 390.90 1.01 393.50 18.28 390.95 1.19 393.55 19.89 391.00 1.37 393.60 21.56 391.05 1.56 393.65 22.97 391.10 1.75 393.70 23.58 391.15 1.94 393.75 24.16 391.20 2.13 393.80 24.73 391.25 2.30 393.85 25.29 391.30 2.47 393.90 25.54 391.35 2.61 393.95 25.76 391.40 2.73 394.00 25.98 391.45 2.86 394.05 26.20 391.50 2.98 394.10 26.42 391.55 3.10 394.15 26.63 391.60 3.21 394.20 26.85 391.65 3.32 394.25 27.06 391.70 3.42 394.30 27.27 391.75 3.53 394.35 27.48 391.80 3.63 394.40 27.69 391.85 3.72 394.45 27.89 391.90 3.82 394.50 28.10 391.95 3.91 394.55 28.30 392.00 4.00 394.60 28.50 392.05 4.09 394.65 28.70 392.10 4.18 394.70 28.90 392.15 4.26 394.75 29.10 392.20 4.34 394.80 29.29 392.25 4.43 394.85 29.49 392.30 4.51 394.90 29.68 392.35 4.59 394.95 29.87 392.40 4.66 395.00 30.06 392.45 4.74 392.50 4.81 392.55 4.89 392.60 4.96 392.65 5.03 392.70 5.10 392.75 5.17 392.80 5.24 392.85 5.31 392.90 5.37 392.95 5.73 393.00 6.33 393.05 7.09 Storm Calcs-update 2-12-2020 Type ll 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 29 Stage-Area-Storage for Pond 2P: EX SWM Facility Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 390.50 1,556 0 393.10 3,383 6,093 390.55 1,581 78 393.15 3,461 6,264 390.60 1,605 158 393.20 3,540 6,439 390.65 1,630 239 393.25 3,618 6,618 390.70 1,654 321 393.30 3,696 6,801 390.75 1,679 404 393.35 3,775 6,988 390.80 1,704 489 393.40 3,853 7,178 390.85 1,728 575 393.45 3,932 7,373 390.90 1,753 662 393.50 4,010 7,572 390.95 1,777 750 393.55 4,088 7,774 391.00 1,802 840 393.60 4,167 7,980 391.05 1,832 930 393.65 4,245 8,191 391.10 1,863 1,023 393.70 4,324 8,405 391.15 1,893 1,117 393.75 4,402 8,623 391.20 1,923 1,212 393.80 4,480 8,845 391.25 1,954 1,309 393.85 4,559 9,071 391.30 1,984 1,407 393.90 4,637 9,301 391.35 2,014 1,507 393.95 4,716 9,535 391.40 2,045 1,609 394.00 4,794 9,773 391.45 2,075 1,712 394.05 4,872 10,014 391.50 2,106 1,816 394.10 4,950 10,260 391.55 2,136 1,922 394.15 5,029 10,509 391.60 2,166 2,030 394.20 5,107 10,763 391.65 2,197 2,139 394.25 5,185 11,020 391.70 2,227 2,250 394.30 5,263 11,281 391.75 2,257 2,362 394.35 5,341 11,546 391.80 2,288 2,475 394.40 5,420 11,815 391.85 2,318 2,590 394.45 5,498 12,088 391.90 2,348 2,707 394.50 5,576 12,365 391.95 2,379 2,825 394.55 5,654 12,646 392.00 2,409 2,945 394.60 5,732 12,930 392.05 2,450 3,066 394.65 5,811 13,219 392.10 2,491 3,190 394.70 5,889 13,511 392.15 2,532 3,316 394.75 5,967 13,808 392.20 2,572 3,443 394.80 6,045 14,108 392.25 2,613 3,573 394.85 6,123 14,412 392.30 2,654 3,704 394.90 6,202 14,721 392.35 2,695 3,838 394.95 6,280 15,033 392.40 2,736 3,974 395.00 6,358 15,349 392.45 2,777 4,112 392.50 2,818 4,252 392.55 2,858 4,394 392.60 2,899 4,537 392.65 2,940 4,683 392.70 2,981 4,831 392.75 3,022 4,982 392.80 3,063 5,134 392.85 3,103 5,288 392.90 3,144 5,444 392.95 3,185 5,602 393.00 3,226 5,763 393.05 3,304 5,926 Storm Calcs-update 2-12-2020 Type /l 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 30 Summary for Link 4L: Pre Analysis Point 1 Inflow Area = 4.300 ac, 37.91% Impervious, Inflow Depth > 3.12" for 10 YR event Inflow = 14.98 cfs @ 12.18 hrs, Volume= 1.118 af Primary = 14.98 cfs @ 12.18 hrs, Volume= 1.118 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Link 4L: Pre Analysis Point 1 Hydrograph / E Inflow (14.98 cfs i 17Primary 16- 14- --Inflow Area=4.300 ac 114.98 cfs 14 ofe,,. 13- 12- 11 10, u 9 0 8-_ - PA 5 4 2 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) N o M L[) N N N •C_ CC 03 ID CC a 0 Z'N Nl- 4ts) srOsrN .- nCD000DODU) 0) CDMMNrf- MON - 0) COc) 000CDU) el CV CDCDc0 - COU) srMN 00) �.M MM V tl7CD 000 CACDnths- NOOth s- o CA op r- C- r- CO CD CD CI) u) Cn Ct) st sr sr sr sr st sr sr el el el C'7 el c7 c7 P7 el el CV l C 10 O O O O O s- s- et et N CA sr Cr) s- .- s- s- O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O r 'C a N w O 0 C ^0000000000000000000000000000000000000000000000000 000000O000000Oo000o000oo0O000O0O000000O00000Ooo0oo0 �� J N .' v0000000000000000000000000000000000000000000000000 in CD U) >+ I- C is O C 3 NCB NI- MstOstNe' is. (ID OOCD00U)0) CDMC') Nr r- oi CD e- sr .- 0) COM003CDt oicy 00)CDN- CDUsrC") N 00) j < pw elel4 nCDOOOO7COf- cls- NOO) cls- 00) 00N N. N000OCDU)inU) Ulstsrsr sr sr444cooioioielclelMC'Mts) N (p L C �OOOOOOs- s- � ei NA sr C C+) s- s- s•- s- 0 000000000000000000000000000000 - 0) a i v O Y N O O O O O O O O O CD CD O O O O 0 0 O O 0 O O O O CD O O 0 0 O O O CD O O O 0 O O O O 0 O O O O O O CD U) = E c NrCDc0CDCV rCOCi00NstCDa3ONstCDa3ONsrCOODONstCD000NstCOODONstCDa00NstC 03CDCV yrQDODCD 000 NNNNNMoi06oi `istst444uiuiuiuiui66CD66r.: f- f� f. l� OOOOOO66ci � O)0) 00 U —IN o O w 10 = O. Z O O O O O O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 s- N N Cs) 8 Cn CD r 00 0) O N st u) 00 o s- sr N 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N N N O7 L E �-'O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O p• N O a N Qu .O II N �-c') A co I C �00000O000000OooOOO0000O000OOOO0000Ooo0oO00000000000O � 2CD o00000o0o0oQoo0000000000000QOO00000000OO00000000000000 N 0o •= � 0000000000000000000000000000000000000000000000000000 CU CC � " 113 cO CO o' E N 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CV CV el sr 1.0 CO N 00 0 0 N sr Cl) 00 0 st N C E O p w 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CV CV CV CV( 0 �0000000000000000000000000000000000000000000000000000 >-0 _ ( Q O ro Ec`p6 m 000O000OOOOOOOOO00000O000OOooO00000O00000O000O000Ooo L a O E rz O N v CD 00 O N sr. CO w O N st CD 00 o N sr CD o O N sr CD 00 O N It CD w O N sr CO w O N sr CD 00 O N sr CD 00 O N sr CD 0 O N rC) Na • 00000 NNNNNC') C") MMC") srsrsr sr4u) u) Cl) Cnu) CDCDCDCDCONNN- f- I- 0000CDCOCOO)0) 0) 0)O) 00 (/) a = Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 32 Time span=0.00-20.00 hrs, dt=0.01 hrs, 2001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl S: Pre SWM Facility Runoff Area=4.200 ac 38.81% Impervious Runoff Depth>6.14" Flow Length=375' Tc=19.7 min CN=83 Runoff=30.11 cfs 2.149 af Subcatchment3S: Pre Unrouted Area Runoff Area=0.100 ac 0.00% Impervious Runoff Depth>5.08" Flow Length=375' Tc=19.7 min CN=74 Runoff=0.61 cfs 0.042 af Pond 2P: EX SWM Facility Peak Elev=394.06' Storage=10,065 cf Inflow=30.11 cfs 2.149 of Outflow=26.25 cfs 2.141 of Link 4L: Pre Analysis Point 1 Inflow=26.79 cfs 2.183 af Primary=26.79 cfs 2.183 af Total Runoff Area = 4.300 ac Runoff Volume = 2.192 af Average Runoff Depth = 6.12" 62.09% Pervious = 2.670 ac 37.91% Impervious = 1.630 ac Storm Calcs-update 2-12-2020 Type ll 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 33 Summary for Subcatchment 1S: Pre SWM Facility Drainage Area Runoff = 30.11 cfs @ 12.11 hrs, Volume= 2.149 af, Depth> 6.14" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 100 YR Rainfall=8.62" Area (ac) CN Description 1.630 98 Paved parking, HSG C 2.470 74 >75% Grass cover, Good, HSG C 0.100 66 Woods, Poor, HSG B 4.200 83 Weighted Average 2.570 61.19% Pervious Area 1.630 38.81% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 2.4 175 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 19.7 375 Total Subcatchment 1S: Pre SWM Facility Drainage Area Hydrograph ❑Runoff 32= --' 30.11 cfs, 30- [Type II 24-hr -T 28 28. 100 YR Rainfall=8.62" 24= Runoff Area=4.200 ac Zo Runoff Volume=2.149 af 18 Runoff Depth>6.14" ° Flow Length=375' IL 14- 124 _ Tc=19.7 min j/ 1°- CN=83 o 2= � 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 34 Hydrograph for Subcatchment 1S: Pre SWM Facility Drainage Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 1.71 0.51 0.93 0.20 0.02 0.00 0.00 10.60 1.81 0.57 1.06 0.40 0.04 0.00 0.00 10.80 1.91 0.63 1.23 0.60 0.05 0.00 0.00 11.00 2.03 0.71 1.44 0.80 0.07 0.00 0.00 11.20 2.17 0.81 1.70 1.00 0.09 0.00 0.00 11.40 2.34 0.94 2.12 1.20 0.11 0.00 0.00 11.60 2.64 1.17 2.70 1.40 0.13 0.00 0.00 11.80 3.71 2.04 6.72 1.60 0.15 0.00 0.00 12.00 5.72 3.83 22.00 1.80 0.17 0.00 0.00 12.20 6.02 4.11 25.82 2.00 0.19 0.00 0.00 12.40 6.25 4.32 10.67 2.20 0.21 0.00 0.00 12.60 6.41 4.47 5.59 2.40 0.23 0.00 0.00 12.80 6.54 4.60 3.55 2.60 0.25 0.00 0.00 13.00 6.65 4.70 2.72 2.80 0.28 0.00 0.00 13.20 6.75 4.80 2.30 3.00 0.30 0.00 0.00 13.40 6.85 4.88 2.02 3.20 0.32 0.00 0.00 13.60 6.93 4.96 1.82 3.40 0.34 0.00 0.00 13.80 7.00 5.03 1.64 3.60 0.37 0.00 0.00 14.00 7.07 5.09 1.49 3.80 0.39 0.00 0.00 14.20 7.13 5.15 1.35 4.00 0.41 0.00 0.00 14.40 7.19 5.21 1.26 4.20 0.44 0.00 0.00 14.60 7.25 5.26 1.21 4.40 0.46 0.00 0.01 14.80 7.30 5.32 1.16 4.60 0.49 0.00 0.02 15.00 7.36 5.37 1.11 4.80 0.52 0.01 0.03 15.20 7.41 5.41 1.06 5.00 0.54 0.01 0.05 15.40 7.46 5.46 1.02 5.20 0.57 0.01 0.06 15.60 7.50 5.50 0.97 5.40 0.60 0.02 0.08 15.80 7.54 5.54 0.92 5.60 0.63 0.02 0.09 16.00 7.59 5.58 0.87 5.80 0.66 0.03 0.11 16.20 7.62 5.62 0.82 6.00 0.69 0.03 0.12 16.40 7.66 5.66 0.79 6.20 0.72 0.04 0.14 16.60 7.70 5.69 0.77 6.40 0.75 0.05 0.16 16.80 7.74 5.73 0.76 6.60 0.79 0.06 0.17 17.00 7.77 5.76 0.74 6.80 0.82 0.07 0.19 17.20 7.81 5.79 0.72 7.00 0.85 0.08 0.21 17.40 7.84 5.83 0.71 7.20 0.89 0.09 0.23 17.60 7.88 5.86 0.69 7.40 0.92 0.10 0.25 17.80 7.91 5.89 0.67 7.60 0.96 0.12 0.26 18.00 7.94 5.92 0.65 7.80 1.00 0.13 0.28 18.20 7.97 5.95 0.64 8.00 1.03 0.15 0.30 18.40 8.00 5.98 0.62 8.20 1.07 0.16 0.32 18.60 8.03 6.00 0.60 8.40 1.12 0.18 0.36 18.80 8.06 6.03 0.58 8.60 1.16 0.20 0.40 19.00 8.08 6.06 0.57 8.80 1.21 0.23 0.45 19.20 8.11 6.08 0.55 9.00 1.27 0.25 0.50 19.40 8.14 6.11 0.53 9.20 1.32 0.28 0.56 19.60 8.16 6.13 0.52 9.40 1.38 0.31 0.59 19.80 8.18 6.15 0.50 9.60 1.43 0.34 0.62 20.00 8.21 6.17 0.48 9.80 1.49 0.38 0.66 10.00 1.56 0.41 0.73 10.20 1.63 0.46 0.82 Storm Calcs-update 2-12-2020 Type l/ 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 sin 08663 ©2019 HydroCAD Software Solutions LLC Page 35 Summary for Subcatchment 3S: Pre Unrouted Area Runoff = 0.61 cfs @ 12.12 hrs, Volume= 0.042 af, Depth> 5.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 100 YR Rainfall=8.62" Area (ac) CN Description 0.000 98 Paved parking, HSG C 0.100 74 >75% Grass cover, Good, HSG C 0.100 74 Weighted Average 0.100 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 2.4 175 0.0300 1.21 Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps 19.7 375 Total Subcatchment 3S: Pre Unrouted Area Hydrograph 0.65 / ❑Runoff` LO 61 crs 0.6 Type II 24-hr ;/ °.55 100 YR Rainfall=8.62" 05 Runoff-Area=0.100 ac 0.45 Runoff-Volume=0.042-af 0.4 Runoff Depth>5.08" 0.35 ;j iL 0.3 Flow Length=375' 0.25- Tc=19.7 min 0.2- CN=74 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 36 Hydrograph for Subcatchment 3S: Pre Unrouted Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (pours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 1.71 0.23 0.01 0.20 0.02 0.00 0.00 10.60 1.81 0.26 0.02 0.40 0.04 0.00 0.00 10.80 1.91 0.31 0.02 0.60 0.05 0.00 0.00 11.00 2.03 0.36 0.02 0.80 0.07 0.00 0.00 11.20 2.17 0.43 0.03 1.00 0.09 0.00 0.00 11.40 2.34 0.52 0.04 1.20 0.11 0.00 0.00 11.60 2.64 0.69 0.05 1.40 0.13 0.00 0.00 11.80 3.71 1.39 0.12 1.60 0.15 0.00 0.00 12.00 5.72 2.95 0.43 1.80 0.17 0.00 0.00 12.20 6.02 3.20 0.53 2.00 0.19 0.00 0.00 12.40 6.25 3.40 0.22 2.20 0.21 0.00 0.00 12.60 6.41 3.53 0.12 2.40 0.23 0.00 0.00 12.80 6.54 3.64 0.08 2.60 0.25 0.00 0.00 13.00 6.65 3.74 0.06 2.80 0.28 0.00 0.00 13.20 6.75 3.83 0.05 3.00 0.30 0.00 0.00 13.40 6.85 3.91 0.04 3.20 0.32 0.00 0.00 13.60 6.93 3.98 0.04 3.40 0.34 0.00 0.00 13.80 7.00 4.04 0.04 3.60 0.37 0.00 0.00 14.00 7.07 4.10 0.03 3.80 0.39 0.00 0.00 14.20 7.13 4.16 0.03 4.00 0.41 0.00 0.00 14.40 7.19 4.21 0.03 4.20 0.44 0.00 0.00 14.60 7.25 4.26 0.03 4.40 0.46 0.00 0.00 14.80 7.30 4.31 0.03 4.60 0.49 0.00 0.00 15.00 7.36 4.36 0.02 4.80 0.52 0.00 0.00 15.20 7.41 4.40 0.02 5.00 0.54 0.00 0.00 15.40 7.46 4.44 0.02 5.20 0.57 0.00 0.00 15.60 7.50 4.48 0.02 5.40 0.60 0.00 0.00 15.80 7.54 4.52 0.02 5.60 0.63 0.00 0.00 16.00 7.59 4.56 0.02 5.80 0.66 0.00 0.00 16.20 7.62 4.59 0.02 6.00 0.69 0.00 0.00 16.40 7.66 4.63 0.02 6.20 0.72 0.00 0.00 16.60 7.70 4.66 0.02 6.40 0.75 0.00 0.00 16.80 7.74 4.69 0.02 6.60 0.79 0.00 0.00 17.00 7.77 4.72 0.02 6.80 0.82 0.00 0.00 17.20 7.81 4.75 0.02 7.00 0.85 0.01 0.00 17.40 7.84 4.78 0.02 7.20 0.89 0.01 0.00 17.60 7.88 4.81 0.02 7.40 0.92 0.01 0.00 17.80 7.91 4.84 0.01 7.60 0.96 0.02 0.00 18.00 7.94 4.87 0.01 7.80 1.00 0.02 0.00 18.20 7.97 4.90 0.01 8.00 1.03 0.03 0.00 18.40 8.00 4.93 0.01 8.20 1.07 0.04 0.00 18.60 8.03 4.95 0.01 8.40 1.12 0.04 0.00 18.80 8.06 4.98 0.01 8.60 1.16 0.05 0.00 19.00 8.08 5.00 0.01 8.80 1.21 0.06 0.00 19.20 8.11 5.02 0.01 9.00 1.27 0.08 0.01 19.40 8.14 5.05 0.01 9.20 1.32 0.09 0.01 19.60 8.16 5.07 0.01 9.40 1.38 0.11 0.01 19.80 8.18 5.09 0.01 9.60 1.43 0.13 0.01 20.00 8.21 5.11 0.01 9.80 1.49 0.15 0.01 10.00 1.56 0.17 0.01 10.20 1.63 0.19 0.01 Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 37 Summary for Pond 2P: EX SWM Facility [44] Hint: Outlet device#3 is below defined storage Inflow Area = 4.200 ac, 38.81% Impervious, Inflow Depth > 6.14" for 100 YR event Inflow = 30.11 cfs @ 12.11 hrs, Volume= 2.149 af Outflow = 26.25 cfs @ 12.20 hrs, Volume= 2.141 af, Atten= 13%, Lag= 4.9 min Primary = 26.25 cfs @ 12.20 hrs, Volume= 2.141 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs/3 Peak Elev= 394.06'@ 12.20 hrs Surf.Area= 4,888 sf Storage= 10,065 cf Plug-Flow detention time=9.8 min calculated for 2.140 of(100% of inflow) Center-of-Mass det. time=8.1 min ( 774.0 -765.9 ) Volume Invert Avail.Storage Storage Description #1 390.50' 15,349 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 390.50 1,556 0 0 391.00 1,802 840 840 392.00 2,409 2,106 2,945 393.00 3,226 2,818 5,763 394.00 4,794 4,010 9,773 395.00 6,358 5,576 15,349 Device Routing Invert Outlet Devices #1 Primary 390.05' 24.0" Round Culvert L= 53.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 390.05'/389.69' S= 0.0068 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight& clean, Flow Area= 3.14 sf #2 Device 1 392.90' 24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads #3 Device 1 390.38' 12.0" Round Culvert L= 8.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 390.38'/390.05' S= 0.0412 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight&clean, Flow Area= 0.79 sf Primary OutFlow Max=26.24 cfs © 12.20 hrs HW=394.06' (Free Discharge) L1=Culvert (Inlet Controls 26.24 cfs @ 8.35 fps) -2=Orifice/Grate (Passes < 20.74 cfs potential flow) 3=Culvert (Passes < 6.74 cfs potential flow) Storm Calcs-update 2-12-2020 Type ll 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 38 Pond 2P: EX SWM Facility Hydrograph Z. Inflow ao ii cfs, ❑Primary 32-30 Inflow Area=4.200 ac 26= - Peak Elev=394.06' 12625cis 26= 24 • - Storage=10,06S cf 22 20 - g 16, 14_ ,2 ,o= j /// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 2P: EX SWM Facility Stage-Discharge 395 / L❑Primary 394 Air --411161111611.r � '' w //Orifice/Grate ,.- 393 j o w 392 391 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Discharge (cfs) Storm Calcs-update 2-12-2020 Type ll 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 39 Pond 2P: EX SWM Facility Stage-Area-Storage Surface/HorizontallWetted Area(sq-ft) 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 5,500 6,000 0 Surface 11 ■Storage 395 /// 394- d 393- 0 W W 392 391 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 Storage(cubic-feet) OS'0 £L•06£ ZLE 917'0 00'OZ 17S'0 5L'06E 86E ZS'0 05'6 L 89'0 9L'06E 9Z17 L9'0 00'61. Z9'0 9L'06E OSt 1.9'0 05'81. L9'0 6L'06E SL17 99'0 00'8l lL'0 1.8'06£ 6617 OL'0 05'L. SL'0 Z8'06£ En 17L'0 0011. 08'0 P8'06£ l55 8L'0 0S'91, 1.6'0 L8'06£ 909 L8'0 00'91. CO'L 06'06£ 999 66'0 OS'Sl 5l'. 176.06E 8ZL L.'. 00'S I. 6Z'L 86•06£ 86L 17Z'. OS'17L L9'l 90'L6E 996 617'L 00171, 55'Z E£•1.6E 9917`L 16'L OS'E L 05'17 0£'Z6E 1769`E ZL'Z 00'£l 98'8 171'£6£ 1717Z`9 0S'L 05'Zl P8'S1 Zte£6£ LSZ`L 00'ZZ 00'Zl 90'Z 81.1.6E LLL`L 8£'Z 09'1.1. 0E'1. 86.06E 1708 1717'. 00'I.I. 1.6'0 L8'06£ 909 00'L OS'O L 89'0 6L'06£ 0917 EL'0 00'01. 8S'0 9L'06E ZZ17 L9'0 05'6 St''0 1.L'06£ 517E 05'0 00'6 17E'0 L9'06£ L9Z 8E'0 09'8 9Z'0 179.06E 1ZZ OE'0 00'9 £Z'0 1.9'06£ 1.91. 9Z'0 0S'L 91.'0 65'06£ 017E 2'0 001 171;0 95'06£ 86 L1.'0 05'9 I.l'0 175'06£ 99 Z.'0 00'9 LO'0 £5'06£ E17 80'0 05'S 170'0 1.9'06£ ZZ SO'0 00'S 1.0'0 05'06£ 5 1.0'0 05'17 00'0 0S'06£ 0 00'0 0017 00'0 05'06£ 0 0011 051E 00'0 05'06£ 0 00'0 001E 00'0 OS'06£ 0 00'0 05'Z 00'0 0S'06£ 0 00'0 00'Z 00'0 9106E 0 00'0 OS'l 00'0 09'06E 0 00'0 00'l 00'0 9106E 0 00'0 OS'0 00'0 05'06£ 0 00'0 00'0 (sp) (tea;) (1ea1-3!gno) (sp) (sJnoy) tiewud uoilena13 e6eJo}S mogul awil k!I!oeI VMS X3 :dZ Puod aoJ gdea6oapAH 017 abed 011 suoitnIoS a1emlioS aVOOJPAH 61OZ O £9980 u/s 5Z-00'0. ®0VOOJPAH 0Z0Z/£6/Z Patu!Jd dnoJo suowwil Aq paJedaJd „Z9.9=IIeJU1ee, eM 00k JU-PZ 11 ad/CI OZOZ-Z 6-Z alepdn-s31e3 waois Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 41 Stage-Discharge for Pond 2P: EX SWM Facility Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 390.50 0.00 393.10 7.97 390.55 0.12 393.15 8.97 390.60 0.20 393.20 10.06 390.65 0.30 393.25 11.24 390.70 0.42 393.30 12.50 390.75 0.55 393.35 13.84 390.80 0.69 393.40 15.25 390.85 0.85 393.45 16.73 390.90 1.01 393.50 18.28 390.95 1.19 393.55 19.89 391.00 1.37 393.60 21.56 391.05 1.56 393.65 22.97 391.10 1.75 393.70 23.58 391.15 1.94 393.75 24.16 391.20 2.13 393.80 24.73 391.25 2.30 393.85 25.29 391.30 2.47 393.90 25.54 391.35 2.61 393.95 25.76 391.40 2.73 394.00 25.98 391.45 2.86 394.05 26.20 391.50 2.98 394.10 26.42 391.55 3.10 394.15 26.63 391.60 3.21 394.20 26.85 391.65 3.32 394.25 27.06 391.70 3.42 394.30 27.27 391.75 3.53 394.35 27.48 391.80 3.63 394.40 27.69 391.85 3.72 394.45 27.89 391.90 3.82 394.50 28.10 391.95 3.91 394.55 28.30 392.00 4.00 394.60 28.50 392.05 4.09 394.65 28.70 392.10 4.18 394.70 28.90 392.15 4.26 394.75 29.10 392.20 4.34 394.80 29.29 392.25 4.43 394.85 29.49 392.30 4.51 394.90 29.68 392.35 4.59 394.95 29.87 392.40 4.66 395.00 30.06 392.45 4.74 392.50 4.81 392.55 4.89 392.60 4.96 392.65 5.03 392.70 5.10 392.75 5.17 392.80 5.24 392.85 5.31 392.90 5.37 392.95 5.73 393.00 6.33 393.05 7.09 Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 42 Stage-Area-Storage for Pond 2P: EX SWM Facility Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 390.50 1,556 0 393.10 3,383 6,093 390.55 1,581 78 393.15 3,461 6,264 390.60 1,605 158 393.20 3,540 6,439 390.65 1,630 239 393.25 3,618 6,618 390.70 1,654 321 393.30 3,696 6,801 390.75 1,679 404 393.35 3,775 6,988 390.80 1,704 489 393.40 3,853 7,178 390.85 1,728 575 393.45 3,932 7,373 390.90 1,753 662 393.50 4,010 7,572 390.95 1,777 750 393.55 4,088 7,774 391.00 1,802 840 393.60 4,167 7,980 391.05 1,832 930 393.65 4,245 8,191 391.10 1,863 1,023 393.70 4,324 8,405 391.15 1,893 1,117 393.75 4,402 8,623 391.20 1,923 1,212 393.80 4,480 8,845 391.25 1,954 1,309 393.85 4,559 9,071 391.30 1,984 1,407 393.90 4,637 9,301 391.35 2,014 1,507 393.95 4,716 9,535 391.40 2,045 1,609 394.00 4,794 9,773 391.45 2,075 1,712 394.05 4,872 10,014 391.50 2,106 1,816 394.10 4,950 10,260 391.55 2,136 1,922 394.15 5,029 10,509 391.60 2,166 2,030 394.20 5,107 10,763 391.65 2,197 2,139 394.25 5,185 11,020 391.70 2,227 2,250 394.30 5,263 11,281 391.75 2,257 2,362 394.35 5,341 11,546 391.80 2,288 2,475 394.40 5,420 11,815 391.85 2,318 2,590 394.45 5,498 12,088 391.90 2,348 2,707 394.50 5,576 12,365 391.95 2,379 2,825 394.55 5,654 12,646 392.00 2,409 2,945 394.60 5,732 12,930 392.05 2,450 3,066 394.65 5,811 13,219 392.10 2,491 3,190 394.70 5,889 13,511 392.15 2,532 3,316 394.75 5,967 13,808 392.20 2,572 3,443 394.80 6,045 14,108 392.25 2,613 3,573 394.85 6,123 14,412 392.30 2,654 3,704 394.90 6,202 14,721 392.35 2,695 3,838 394.95 6,280 15,033 392.40 2,736 3,974 395.00 6,358 15,349 392.45 2,777 4,112 392.50 2,818 4,252 392.55 2,858 4,394 392.60 2,899 4,537 392.65 2,940 4,683 392.70 2,981 4,831 392.75 3,022 4,982 392.80 3,063 5,134 392.85 3,103 5,288 392.90 3,144 5,444 392.95 3,185 5,602 393.00 3,226 5,763 393.05 3,304 5,926 Storm Calcs-update 2-12-2020 Type ll 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 43 Summary for Link 4L: Pre Analysis Point 1 Inflow Area = 4.300 ac, 37.91% Impervious, Inflow Depth > 6.09" for 100 YR event Inflow = 26.79 cfs @ 12.19 hrs, Volume= 2.183 af Primary = 26.79 cfs @ 12.19 hrs, Volume= 2.183 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Link 4L: Pre Analysis Point 1 Hydrograph 30 I inflow �26.79 cis; ©Primary 281' _ _Inflow Area=4.300 ac 26.79 cfs 28- 24 i% 22- 20 18 -- %% 16 I0 0 14- . LL 12- 10: 0- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 44 Hydrograph for Link 4L: Pre Analysis Point 1 Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 10.40 0.86 0.00 0.86 0.20 0.00 0.00 0.00 10.60 0.99 0.00 0.99 0.40 0.00 0.00 0.00 10.80 1.13 0.00 1.13 0.60 0.00 0.00 0.00 11.00 1.32 0.00 1.32 0.80 0.00 0.00 0.00 11.20 1.55 0.00 1.55 1.00 0.00 0.00 0.00 11.40 1.88 0.00 1.88 1.20 0.00 0.00 0.00 11.60 2.34 0.00 2.34 1.40 0.00 0.00 0.00 11.80 3.57 0.00 3.57 1.60 0.00 0.00 0.00 12.00 16.28 0.00 16.28 1.80 0.00 0.00 0.00 12.20 26.77 0.00 26.77 2.00 0.00 0.00 0.00 12.40 13.25 0.00 13.25 2.20 0.00 0.00 0.00 12.60 6.73 0.00 6.73 2.40 0.00 0.00 0.00 12.80 5.24 0.00 5.24 2.60 0.00 0.00 0.00 13.00 4.56 0.00 4.56 2.80 0.00 0.00 0.00 13.20 3.73 0.00 3.73 3.00 0.00 0.00 0.00 13.40 2.92 0.00 2.92 3.20 0.00 0.00 0.00 13.60 2.28 0.00 2.28 3.40 0.00 0.00 0.00 13.80 1.87 0.00 1.87 3.60 0.00 0.00 0.00 14.00 1.64 0.00 1.64 3.80 0.00 0.00 0.00 14.20 1.48 0.00 1.48 4.00 0.00 0.00 0.00 14.40 1.36 0.00 1.36 4.20 0.00 0.00 0.00 14.60 1.28 0.00 1.28 4.40 0.00 0.00 0.00 14.80 1.22 0.00 1.22 4.60 0.01 0.00 0.01 15.00 1.17 0.00 1.17 4.80 0.02 0.00 0.02 15.20 1.12 0.00 1.12 5.00 0.04 0.00 0.04 15.40 1.07 0.00 1.07 5.20 0.05 0.00 0.05 15.60 1.02 0.00 1.02 5.40 0.06 0.00 0.06 15.80 0.97 0.00 0.97 5.60 0.08 0.00 0.08 16.00 0.93 0.00 0.93 5.80 0.09 0.00 0.09 16.20 0.88 0.00 0.88 6.00 0.11 0.00 0.11 16.40 0.84 0.00 0.84 6.20 0.12 0.00 0.12 16.60 0.81 0.00 0.81 6.40 0.14 0.00 0.14 16.80 0.79 0.00 0.79 6.60 0.15 0.00 0.15 17.00 0.77 0.00 0.77 6.80 0.17 0.00 0.17 17.20 0.75 0.00 0.75 7.00 0.19 0.00 0.19 17.40 0.73 0.00 0.73 7.20 0.21 0.00 0.21 17.60 0.72 0.00 0.72 7.40 0.22 0.00 0.22 17.80 0.70 0.00 0.70 7.60 0.24 0.00 0.24 18.00 0.68 0.00 0.68 7.80 0.26 0.00 0.26 18.20 0.66 0.00 0.66 8.00 0.28 0.00 0.28 18.40 0.65 0.00 0.65 8.20 0.30 0.00 0.30 18.60 0.63 0.00 0.63 8.40 0.33 0.00 0.33 18.80 0.61 0.00 0.61 8.60 0.36 0.00 0.36 19.00 0.59 0.00 0.59 8.80 0.41 0.00 0.41 19.20 0.58 0.00 0.58 9.00 0.46 0.00 0.46 19.40 0.56 0.00 0.56 9.20 0.52 0.00 0.52 19.60 0.54 0.00 0.54 9.40 0.57 0.00 0.57 19.80 0.52 0.00 0.52 9.60 0.60 0.00 0.60 20.00 0.51 0.00 0.51 9.80 0.63 0.00 0.63 10.00 0.69 0.00 0.69 10.20 0.76 0.00 0.76 <14S> Bioretenti n 2 Area0 Biortention 1 Area — A _ Ae D 16P Biore ntion111 Ponding Bioretention 2 'onding Bioretenti n 2 Media I c7 0 13P Remaining Post S Bioretention 1 Media Facility Drainage Area 4 18P Modified S M Facility 9S 20L Post Unrouted Area Post Analysis Point 1 (Bobcat Reach 'on. MI Routing Diagram for Storm Calcs-update 2-12-2020 Prepared by Timmons Group, Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Storm Calcs-update 2-12-2020 Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 2 Area Listing (selected nodes) Area CN Description (acres) (subcatchment-numbers) 1.840 74 >75% Grass cover, Good, HSG C (11 S, 14S, 17S, 19S) 2.390 98 Paved parking, HSG C (11 S, 14S, 17S, 19S) 0.070 77 Woods, Poor, HSG C (11 S, 14S) 4.300 87 TOTAL AREA Storm Calcs-update 2-12-2020 Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 3 Soil Listing (selected nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 4.300 HSG C 11 S, 14S, 17S, 19S 0.000 HSG D 0.000 Other 4.300 TOTAL AREA Storm Calcs-update 2-12-2020 Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 4 Ground Covers (selected nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 1.840 0.000 0.000 1.840 >75% Grass cover, Good 11 S, 14S, 17S, 19S 0.000 0.000 2.390 0.000 0.000 2.390 Paved parking 11 S, 14S, 17S, 19S 0.000 0.000 0.070 0.000 0.000 0.070 Woods, Poor 11 S, 14S 0.000 0.000 4.300 0.000 0.000 4.300 TOTAL AREA Storm Calcs-update 2-12-2020 Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Pape 5 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n Diamdth Height Inside-Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 17S 0.00 0.00 200.0 0.0200 0.010 15.0 0.0 0.0 2 19S 0.00 0.00 200.0 0.0200 0.010 15.0 0.0 0.0 3 18P 390.05 389.75 52.0 0.0058 0.011 24.0 0.0 0.0 Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 sin 08663 ©2019 HydroCAD Software Solutions LLC Page 6 Time span=0.00-20.00 hrs, dt=0.01 hrs, 2001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl l S: Bioretention 1 Area Runoff Area=1.340 ac 23.88% Impervious Runoff Depth>1.05" Tc=5.0 min CN=80 Runoff=2.88 cfs 0.117 af Subcatchment14S: Bioretention 2 Area Runoff Area=0.880 ac 76.14% Impervious Runoff Depth>1.91" Tc=5.0 min CN=92 Runoff=3.17 cfs 0.140 af Subcatchment17S: Remaining Post SWM Runoff Area=1.980 ac 67.17% Impervious Runoff Depth>1.73" Flow Length=400' Tc=17.6 min CN=90 Runoff=4.38 cfs 0.286 af Subcatchment19S: Post Unrouted Area Runoff Area=0.100 ac 70.00% Impervious Runoff Depth>1.81" Flow Length=400' Tc=17.6 min CN=91 Runoff=0.23 cfs 0.015 af Pond 12P: Bioretention1 Ponding Peak Elev=401.15' Storage=1,053 cf Inflow=2.88 cfs 0.117 af Primary=2.55 cfs 0.045 af Secondary=0.12 cfs 0.072 af Outflow=2.67 cfs 0.117 af Pond 13P: Bioretention 1 Media Peak EIev=396.18' Storage=4 cf Inflow=0.12 cfs 0.072 af Outflow=0.12 cfs 0.072 af Pond 15P: Bioretention2 Ponding Peak EIev=399.79' Storage=1,473 cf Inflow=3.17 cfs 0.140 af Primary=2.41 cfs 0.044 af Secondary=0.20 cfs 0.096 af Outflow=2.60 cfs 0.140 af Pond 16P: Bioretention 2 Media Peak EIev=395.41' Storage=995 cf Inflow=0.20 cfs 0.096 af Outflow=0.19 cfs 0.074 af Pond 18P: Modified SWM Facility Peak Elev=392.29' Storage=6,619 cf Inflow=8.67 cfs 0.521 af Outflow=2.51 cfs 0.511 af Link 20L: Post Analysis Point 1 Inflow=2.60 cfs 0.526 af Primary=2.60 cfs 0.526 af Total Runoff Area = 4.300 ac Runoff Volume = 0.558 af Average Runoff Depth = 1.56" 44.42% Pervious = 1.910 ac 55.58% Impervious = 2.390 ac Storm Calcs-update 2-12-2020 Type l/ 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 11S: Bioretention 1 Area Runoff = 2.88 cfs © 11.97 hrs, Volume= 0.117 af, Depth> 1.05" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 1 YR Rainfall=2.87" Area (ac) CN Description 0.320 98 Paved parking, HSG C 1.000 74 >75% Grass cover, Good, HSG C 0.020 77 Woods, Poor, HSG C 1.340 80 Weighted Average 1.020 76.12% Pervious Area 0.320 23.88% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 11S: Bioretention 1 Area Hydrograph / ❑Runoff 3 2.E3 Os i Type II 24-hr 1 YR Rainfall=2.87" / Runoff Area=1.340 ac 2 Runoff Volume=0.117 af Runoff Depth>1.05" ° Tc=5.0 min LL CN=80 • v. 0 "l///////////////%///////////////////ll�///////� 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type ll 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 11S: Bioretention 1 Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 0.57 0.00 0.01 0.20 0.01 0.00 0.00 10.60 0.60 0.00 0.01 0.40 0.01 0.00 0.00 10.80 0.64 0.01 0.02 0.60 0.02 0.00 0.00 11.00 0.67 0.01 0.03 0.80 0.02 0.00 0.00 11.20 0.72 0.02 0.05 1.00 0.03 0.00 0.00 11.40 0.78 0.03 0.07 1.20 0.04 0.00 0.00 11.60 0.88 0.05 0.16 1.40 0.04 0.00 0.00 11.80 1.24 0.17 0.86 1.60 0.05 0.00 0.00 12.00 1.90 0.50 2.53 1.80 0.06 0.00 0.00 12.20 2.01 0.57 0.41 2.00 0.06 0.00 0.00 12.40 2.08 0.61 0.31 2.20 0.07 0.00 0.00 12.60 2.13 0.65 0.21 2.40 0.08 0.00 0.00 12.80 2.18 0.67 0.19 2.60 0.08 0.00 0.00 13.00 2.22 0.70 0.16 2.80 0.09 0.00 0.00 13.20 2.25 0.72 0.15 3.00 0.10 0.00 0.00 13.40 2.28 0.74 0.13 3.20 0.11 0.00 0.00 13.60 2.31 0.76 0.12 3.40 0.11 0.00 0.00 13.80 2.33 0.77 0.11 3.60 0.12 0.00 0.00 14.00 2.35 0.79 0.10 3.80 0.13 0.00 0.00 14.20 2.37 0.80 0.09 4.00 0.14 0.00 0.00 14.40 2.39 0.82 0.09 4.20 0.15 0.00 0.00 14.60 2.41 0.83 0.09 4.40 0.15 0.00 0.00 14.80 2.43 0.84 0.08 4.60 0.16 0.00 0.00 15.00 2.45 0.85 0.08 4.80 0.17 0.00 0.00 15.20 2.47 0.87 0.08 5.00 0.18 0.00 0.00 15.40 2.48 0.88 0.07 5.20 0.19 0.00 0.00 15.60 2.50 0.89 0.07 5.40 0.20 0.00 0.00 15.80 2.51 0.90 0.07 5.60 0.21 0.00 0.00 16.00 2.53 0.91 0.06 5.80 0.22 0.00 0.00 16.20 2.54 0.92 0.06 6.00 0.23 0.00 0.00 16.40 2.55 0.92 0.06 6.20 0.24 0.00 0.00 16.60 2.56 0.93 0.06 6.40 0.25 0.00 0.00 16.80 2.58 0.94 0.06 6.60 0.26 0.00 0.00 17.00 2.59 0.95 0.06 6.80 0.27 0.00 0.00 17.20 2.60 0.96 0.06 7.00 0.28 0.00 0.00 17.40 2.61 0.97 0.05 7.20 0.30 0.00 0.00 17.60 2.62 0.97 0.05 7.40 0.31 0.00 0.00 17.80 2.63 0.98 0.05 7.60 0.32 0.00 0.00 18.00 2.64 0.99 0.05 7.80 0.33 0.00 0.00 18.20 2.65 1.00 0.05 8.00 0.34 0.00 0.00 18.40 2.66 1.00 0.05 8.20 0.36 0.00 0.00 18.60 2.67 1.01 0.05 8.40 0.37 0.00 0.00 18.80 2.68 1.02 0.04 8.60 0.39 0.00 0.00 19.00 2.69 1.02 0.04 8.80 0.40 0.00 0.00 19.20 2.70 1.03 0.04 9.00 0.42 0.00 0.00 19.40 2.71 1.04 0.04 9.20 0.44 0.00 0.00 19.60 2.72 1.04 0.04 9.40 0.46 0.00 0.00 19.80 2.72 1.05 0.04 9.60 0.48 0.00 0.00 20.00 2.73 1.05 0.04 9.80 0.50 0.00 0.00 10.00 0.52 0.00 0.00 10.20 0.54 0.00 0.00 Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 14S: Bioretention 2 Area Runoff = 3.17 cfs @ 11.96 hrs, Volume= 0.140 af, Depth> 1.91" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 1 YR Rainfall=2.87" Area (ac) CN Description 0.670 98 Paved parking, HSG C 0.160 74 >75% Grass cover, Good, HSG C 0.050 77 Woods, Poor, HSG C 0.880 92 Weighted Average 0.210 23.86% Pervious Area 0.670 76.14% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ftlsec) (cfs) 5.0 Direct Entry, Subcatchment 14S: Bioretention 2 Area Hydrograph ❑Runoff 3.17 cfs 3 Type II 24-hr 1 YR Rainfall=2.87" Runoff Area=0.880 ac Runoff Volume=0.140 af 2 Runoff Depth>1.91" ^� Tc=5.0 min CN=92 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 90'0 L 1 0 b5'0 OZ'O 1 90'0 01'0 Z9'0 00'01, 170'0 60'0 05'0 08'6 £0'0 1.6'6 EL'Z 00'0Z 170'0 90'0 WO 09'6 £0'0 06'1 ZL'Z 09'61, £0'0 L0'0 917'0 O17'6 £0'0 68'1 ZL'Z 09'6l £0'0 90'0 Pb'0 OZ'6 £0'0 69'1 1L'Z 017'61, £0'0 90'0 Z17'0 00'6 170'0 88'1 OLZ OZ'61 £0'0 S0'0 01'0 09'8 10'0 L8'l 69'Z 00'61 ZOO 170'0 6£'0 09'8 10'0 99'1 99'Z 09'81 ZOO P0'0 L£'0 01'8 10'0 S8'1 L9'Z 09'91 ZOO £0'0 9E'0 OZ'8 10'0 178'1 99'Z O17.91, ZOO £0'0 PE'O 00'8 170'0 19'l 99'Z 0Z'9l ZOO ZOO ££'0 08'L 10'0 £8'l 1797 00'91 [0'0 ZOO Z£'0 09'L 170'0 Z8'1. £97 0911 10'0 ZOO 1£'0 OWL 90'0 1.8'l Z9'Z 0911. 10'0 1,010 0£'0 OZ'L 90'0 08'1 19'Z OWL[ 10'0 10'0 8Z'O 001 50'0 6L'1 09 Z OZ'L 1 l0'0 l0'0 LZ'O 08'9 50'0 LL'1 69 Z 0011 10'0 10'0 9Z'O 09"9 50'0 9L'L 99'Z 08'91 10'0 10'0 SZ'0 O17'9 90'0 SL'l 99'Z 09'91, 1,0'0 00'0 PZ'O OZ'9 50'0 PL'l 55'Z 01'9l 00'0 00'0 EZ'0 00'9 90'0 £L'l b5'Z OZ'91. 00'0 00'0 ZZ'O 08'5 90'0 ZL'l £5'Z 00'9l 00'0 00'0 1Z'0 09'9 90'0 Of 1 15'Z 08'S l 00'0 00'0 OZ'O O17'5 90'0 69"l 09'Z 09'91 00'0 00'0 61'0 OZ'S L0'0 89'1 81'Z O17'91 00'0 00'0 91'O 00'9 L0'0 99'1 LW Z On l 00'0 00'0 L 1'O 091P L0'0 99'1 SWZ 00'51, 00'0 00'0 91'0 09'1 90'0 £9'L £b'Z o8'Pl 00'0 00'0 91'0 OWP 90'0 19'l 14Z 09'14 00'0 00'0 91.'0 OZ', 80'0 09'1 6£'Z OWPI 00'0 00'0 Pl'0 00'P 80'0 85'1, LE'Z OZ'P1 00'0 00'0 £L'0 09'£ 60'0 99'l S£'? 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(sinoy) (sp) (sayoui) (sayoui) (sJnoy) toun�{ ssaox3 .dioaJd awl' gounb ssaox .dioaJd awl! easy z uoi;ua;aaoi8 :Ste t ;ueunp;eogns AN gdea6oapAH 01 abed ail suoplos aJemps adaoJPAH 610Z 0 £9990 Ws SZ-00'O 1 ®avaoJPAH OZOZ/£1/Z Paluud dnalo suowwil Aq paJedaad „Z9 Z=IleJuleeI eM I. RI-bZ ll adA1 OZOZ-Z6-Z a;epdn-s3Ie3 wao;s Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 sin 08663 ©2019 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment 17S: Remaining Post SWM Facility Drainage Area Runoff = 4.38 cfs @ 12.10 hrs, Volume= 0.286 af, Depth> 1.73" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 1 YR Rainfall=2.87" Area (ac) CN Description 1.330 98 Paved parking, HSG C 0.650 74 >75% Grass cover, Good, HSG C 0.000 66 Woods, Poor, HSG B 1.980 90 Weighted Average 0.650 32.83% Pervious Area 1.330 67.17% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 0.3 200 0.0200 9.68 11.88 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.010 PVC, smooth interior 17.6 400 Total Subcatchment 17S: Remaining Post SWM Facility Drainage Area Hydrograph j ❑Runoff` 14.38 cfs Type II 24-hr 4 1 YR Rainfall=2.87" Runoff Area=1.980 ac 3 Runoff Volume=0.286 af ^� Runoff Depth>1.73" Flow Length=400' 2 Tc=17.6 min 0 CN=90 0 d 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 12 Hydrograph for Subcatchment 17S: Remaining Post SWM Facility Drainage Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 0.57 0.08 0.10 0.20 0.01 0.00 0.00 10.60 0.60 0.10 0.11 0.40 0.01 0.00 0.00 10.80 0.64 0.11 0.13 0.60 0.02 0.00 0.00 11.00 0.67 0.13 0.16 0.80 0.02 0.00 0.00 11.20 0.72 0.15 0.20 1.00 0.03 0.00 0.00 11.40 0.78 0.19 0.25 1.20 0.04 0.00 0.00 11.60 0.88 0.24 0.33 1.40 0.04 0.00 0.00 11.80 1.24 0.48 0.96 1.60 0.05 0.00 0.00 12.00 1.90 1.01 3.36 1.80 0.06 0.00 0.00 12.20 2.01 1.10 3.35 2.00 0.06 0.00 0.00 12.40 2.08 1.16 1.29 2.20 0.07 0.00 0.00 12.60 2.13 1.21 0.71 2.40 0.08 0.00 0.00 12.80 2.18 1.25 0.47 2.60 0.08 0.00 0.00 13.00 2.22 1.28 0.38 2.80 0.09 0.00 0.00 13.20 2.25 1.31 0.33 3.00 0.10 0.00 0.00 13.40 2.28 1.34 0.29 3.20 0.11 0.00 0.00 13.60 2.31 1.36 0.26 3.40 0.11 0.00 0.00 13.80 2.33 1.38 0.24 3.60 0.12 0.00 0.00 14.00 2.35 1.40 0.21 3.80 0.13 0.00 0.00 14.20 2.37 1.42 0.20 4.00 0.14 0.00 0.00 14.40 2.39 1.44 0.18 4.20 0.15 0.00 0.00 14.60 2.41 1.45 0.18 4.40 0.15 0.00 0.00 14.80 2.43 1.47 0.17 4.60 0.16 0.00 0.00 15.00 2.45 1.49 0.16 4.80 0.17 0.00 0.00 15.20 2.47 1.50 0.16 5.00 0.18 0.00 0.00 15.40 2.48 1.52 0.15 5.20 0.19 0.00 0.00 15.60 2.50 1.53 0.14 5.40 0.20 0.00 0.00 15.80 2.51 1.54 0.13 5.60 0.21 0.00 0.00 16.00 2.53 1.55 0.13 5.80 0.22 0.00 0.00 16.20 2.54 1.57 0.12 6.00 0.23 0.00 0.00 16.40 2.55 1.58 0.12 6.20 0.24 0.00 0.00 16.60 2.56 1.59 0.11 6.40 0.25 0.00 0.00 16.80 2.58 1.60 0.11 6.60 0.26 0.00 0.00 17.00 2.59 1.61 0.11 6.80 0.27 0.00 0.01 17.20 2.60 1.62 0.11 7.00 0.28 0.00 0.01 17.40 2.61 1.63 0.10 7.20 0.30 0.00 0.01 17.60 2.62 1.64 0.10 7.40 0.31 0.01 0.01 17.80 2.63 1.65 0.10 7.60 0.32 0.01 0.02 18.00 2.64 1.66 0.10 7.80 0.33 0.01 0.02 18.20 2.65 1.67 0.09 8.00 0.34 0.01 0.02 18.40 2.66 1.68 0.09 8.20 0.36 0.01 0.02 18.60 2.67 1.69 0.09 8.40 0.37 0.02 0.03 18.80 2.68 1.69 0.09 8.60 0.39 0.02 0.03 19.00 2.69 1.70 0.08 8.80 0.40 0.03 0.04 19.20 2.70 1.71 0.08 9.00 0.42 0.03 0.04 19.40 2.71 1.72 0.08 9.20 0.44 0.04 0.05 19.60 2.72 1.73 0.08 9.40 0.46 0.04 0.05 19.80 2.72 1.73 0.07 9.60 0.48 0.05 0.06 20.00 2.73 1.74 0.07 9.80 0.50 0.05 0.06 10.00 0.52 0.06 0.07 10.20 0.54 0.07 0.08 Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment 19S: Post Unrouted Area Runoff = 0.23 cfs @ 12.10 hrs, Volume= 0.015 af, Depth> 1.81" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 1 YR Rainfall=2.87" Area (ac) CN Description 0.070 98 Paved parking, HSG C 0.030 74 >75% Grass cover, Good, HSG C 0.000 66 Woods, Poor, HSG B 0.100 91 Weighted Average 0.030 30.00% Pervious Area 0.070 70.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 0.3 200 0.0200 9.68 11.88 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.010 PVC, smooth interior 17.6 400 Total Subcatchment 19S: Post Unrouted Area Hydrograph 0.25 ❑Runoff` 0.24_ 10.23 cis 00.22.23 :Type II 24-h r °oz 1;YF� Rainfall=2.87". 0.18. RunoffrArea=0.100 ac 0.17- 0.16 Runoff-Volume=0.015 af _ 0.15- 0.14. • -Runoff-Depth>1.81" 3 0.13- LL Flow Len jth=40W '// 009_ Tc=17.6 min I CN=91 - • 0.04 0.03 X 0.02 0.01 -- — 0T 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 14 Hydrograph for Subcatchment 19S: Post Unrouted Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 0.57 0.10 0.01 0.20 0.01 0.00 0.00 10.60 0.60 0.12 0.01 0.40 0.01 0.00 0.00 10.80 0.64 0.13 0.01 0.60 0.02 0.00 0.00 11.00 0.67 0.16 0.01 0.80 0.02 0.00 0.00 11.20 0.72 0.18 0.01 1.00 0.03 0.00 0.00 11.40 0.78 0.22 0.01 1.20 0.04 0.00 0.00 11.60 0.88 0.28 0.02 1.40 0.04 0.00 0.00 11.80 1.24 0.53 0.05 1.60 0.05 0.00 0.00 12.00 1.90 1.08 0.18 1.80 0.06 0.00 0.00 12.20 2.01 1.17 0.18 2.00 0.06 0.00 0.00 12.40 2.08 1.23 0.07 2.20 0.07 0.00 0.00 12.60 2.13 1.28 0.04 2.40 0.08 0.00 0.00 12.80 2.18 1.32 0.02 2.60 0.08 0.00 0.00 13.00 2.22 1.35 0.02 2.80 0.09 0.00 0.00 13.20 2.25 1.38 0.02 3.00 0.10 0.00 0.00 13.40 2.28 1.41 0.01 3.20 0.11 0.00 0.00 13.60 2.31 1.44 0.01 3.40 0.11 0.00 0.00 13.80 2.33 1.46 0.01 3.60 0.12 0.00 0.00 14.00 2.35 1.48 0.01 3.80 0.13 0.00 0.00 14.20 2.37 1.50 0.01 4.00 0.14 0.00 0.00 14.40 2.39 1.51 0.01 4.20 0.15 0.00 0.00 14.60 2.41 1.53 0.01 4.40 0.15 0.00 0.00 14.80 2.43 1.55 0.01 4.60 0.16 0.00 0.00 15.00 2.45 1.56 0.01 4.80 0.17 0.00 0.00 15.20 2.47 1.58 0.01 5.00 0.18 0.00 0.00 15.40 2.48 1.59 0.01 5.20 0.19 0.00 0.00 15.60 2.50 1.61 0.01 5.40 0.20 0.00 0.00 15.80 2.51 1.62 0.01 5.60 0.21 0.00 0.00 16.00 2.53 1.63 0.01 5.80 0.22 0.00 0.00 16.20 2.54 1.65 0.01 6.00 0.23 0.00 0.00 16.40 2.55 1.66 0.01 6.20 0.24 0.00 0.00 16.60 2.56 1.67 0.01 6.40 0.25 0.00 0.00 16.80 2.58 1.68 0.01 6.60 0.26 0.00 0.00 17.00 2.59 1.69 0.01 6.80 0.27 0.01 0.00 17.20 2.60 1.70 0.01 7.00 0.28 0.01 0.00 17.40 2.61 1.71 0.01 7.20 0.30 0.01 0.00 17.60 2.62 1.72 0.01 7.40 0.31 0.01 0.00 17.80 2.63 1.73 0.01 7.60 0.32 0.01 0.00 18.00 2.64 1.74 0.00 7.80 0.33 0.02 0.00 18.20 2.65 1.75 0.00 8.00 0.34 0.02 0.00 18.40 2.66 1.76 0.00 8.20 0.36 0.02 0.00 18.60 2.67 1.77 0.00 8.40 0.37 0.03 0.00 18.80 2.68 1.78 0.00 8.60 0.39 0.03 0.00 19.00 2.69 1.79 0.00 8.80 0.40 0.04 0.00 19.20 2.70 1.79 0.00 9.00 0.42 0.04 0.00 19.40 2.71 1.80 0.00 9.20 0.44 0.05 0.00 19.60 2.72 1.81 0.00 9.40 0.46 0.05 0.00 19.80 2.72 1.82 0.00 9.60 0.48 0.06 0.00 20.00 2.73 1.82 0.00 9.80 0.50 0.07 0.00 10.00 0.52 0.08 0.00 10.20 0.54 0.09 0.00 Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 15 Summary for Pond 12P: Bioretention 1 Ponding Inflow Area = 1.340 ac, 23.88% Impervious, Inflow Depth > 1.05" for 1 YR event Inflow = 2.88 cfs @ 11.97 hrs, Volume= 0.117 af Outflow = 2.67 cfs @ 11.99 hrs, Volume= 0.117 af, Atten= 7%, Lag= 1.6 min Primary = 2.55 cfs @ 11.99 hrs, Volume= 0.045 af Secondary= 0.12 cfs @ 11.99 hrs, Volume= 0.072 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 401.15'@ 11.99 hrs Surf.Area= 1,281 sf Storage= 1,053 cf Plug-Flow detention time=48.9 min calculated for 0.117 af(100% of inflow) Center-of-Mass det. time=48.2 min ( 846.2 - 798.0 ) Volume Invert Avail.Storage Storage Description #1 400.17' 2,580 cf Custom Stage Data (Prismaticpsted below(Recaic) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 400.17 870 0 0 402.17 1,710 2,580 2,580 Device Routing Invert Outlet Devices #1 Secondary 400.17' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 1.00' #2 Primary 400.90' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.54 cfs @ 11.99 hrs HW=401.15' (Free Discharge) L2=Orifice/Grate (Weir Controls 2.54 cfs @ 1.63 fps) Secondary OutFlow Max=0.12 cfs @ 11.99 hrs HW=401.15' (Free Discharge) 1=Exfiltration ( Controls 0.12 cfs) Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 16 Pond 12P: Bioretention 1 Ponding Hydrograph _ Inflow 12.88 cfs Outflow ❑Inflow Area=1 .340 ac Primary 2.67 cfs 3 Peak Elev=401.15' 12.55c.0 Storage=1,053 cf 2 41 LL %" 1 II Skimimmom /! // //0.12/cfs A 0 - 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 12P: Bioretention 1 Ponding Stage-Discharge / Total ❑Primary j Secondary 402- jor w1 //'" d• 401- w • 0 2 4 6 8 10 12 14 16 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 17 Pond 12P: Bioretention 1 Ponding Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,700 ❑Surface IIStorage 402 c 0 a m 401 w I 1 1 1 1 I I I I 1 II 1 I I I .1 I I I 111111111111111111111 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 02019 HydroCAD Software Solutions LLC Page 18 Hydrograph for Pond 12P: Bioretention 1 Ponding Time Inflow Storage Elevation Outflow Primary Secondary (hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0 400.17 0.00 0.00 0.00 0.50 0.00 0 400.17 0.00 0.00 0.00 1.00 0.00 0 400.17 0.00 0.00 0.00 1.50 0.00 0 400.17 0.00 0.00 0.00 2.00 0.00 0 400.17 0.00 0.00 0.00 2.50 0.00 0 400.17 0.00 0.00 0.00 3.00 0.00 0 400.17 0.00 0.00 0.00 3.50 0.00 0 400.17 0.00 0.00 0.00 4.00 0.00 0 400.17 0.00 0.00 0.00 4.50 0.00 0 400.17 0.00 0.00 0.00 5.00 0.00 0 400.17 0.00 0.00 0.00 5.50 0.00 0 400.17 0.00 0.00 0.00 6.00 0.00 0 400.17 0.00 0.00 0.00 6.50 0.00 0 400.17 0.00 0.00 0.00 7.00 0.00 0 400.17 0.00 0.00 0.00 7.50 0.00 0 400.17 0.00 0.00 0.00 8.00 0.00 0 400.17 0.00 0.00 0.00 8.50 0.00 0 400.17 0.00 0.00 0.00 9.00 0.00 0 400.17 0.00 0.00 0.00 9.50 0.00 0 400.17 0.00 0.00 0.00 10.00 0.00 0 400.17 0.00 0.00 0.00 10.50 0.01 2 400.17 0.01 0.00 0.01 11.00 0.03 6 400.18 0.03 0.00 0.03 11.50 0.09 16 400.19 0.08 0.00 0.08 12.00 2.53 1,051 401.15 2.65 2.53 0.12 12.50 0.25 795 400.94 0.28 0.17 0.11 13.00 0.16 770 400.92 0.17 0.06 0.11 13.50 0.13 759 400.91 0.13 0.02 0.11 14.00 0.10 746 400.90 0.11 0.00 0.11 14.50 0.09 719 400.88 0.11 0.00 0.11 15.00 0.08 679 400.84 0.11 0.00 0.11 15.50 0.07 626 400.80 0.11 0.00 0.11 16.00 0.06 561 400.74 0.10 0.00 0.10 16.50 0.06 488 400.67 0.10 0.00 0.10 17.00 0.06 415 400.60 0.10 0.00 0.10 17.50 0.05 340 400.53 0.09 0.00 0.09 18.00 0.05 266 400.46 0.09 0.00 0.09 18.50 0.05 190 400.38 0.09 0.00 0.09 19.00 0.04 115 400.30 0.09 0.00 0.09 19.50 0.04 39 400.21 0.08 0.00 0.08 20.00 0.04 8 400.18 0.04 0.00 0.04 Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 19 Stage-Discharge for Pond 12P: Bioretention 1 Ponding Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary (feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs) 400.17 0.00 0.00 0.00 401.21 3.67 3.55 0.12 400.19 0.08 0.00 0.08 401.23 4.02 3.89 0.12 400.21 0.08 0.00 0.08 401.25 4.38 4.25 0.12 400.23 0.08 0.00 0.08 401.27 4.75 4.62 0.12 400.25 0.08 0.00 0.08 401.29 5.13 5.00 0.12 400.27 0.08 0.00 0.08 401.31 5.52 5.39 0.13 400.29 0.09 0.00 0.09 401.33 5.92 5.79 0.13 400.31 0.09 0.00 0.09 401.35 6.33 6.20 0.13 400.33 0.09 0.00 0.09 401.37 6.75 6.62 0.13 400.35 0.09 0.00 0.09 401.39 7.18 7.05 0.13 400.37 0.09 0.00 0.09 401.41 7.61 7.48 0.13 400.39 0.09 0.00 0.09 401.43 8.06 7.93 0.13 400.41 0.09 0.00 0.09 401.45 8.51 8.38 0.13 400.43 0.09 0.00 0.09 401.47 8.97 8.84 0.13 400.45 0.09 0.00 0.09 401.49 9.44 9.31 0.13 400.47 0.09 0.00 0.09 401.51 9.92 9.79 0.13 400.49 0.09 0.00 0.09 401.53 10.41 10.27 0.13 400.51 0.09 0.00 0.09 401.55 10.90 10.77 0.13 400.53 0.09 0.00 0.09 401.57 11.40 11.27 0.14 400.55 0.10 0.00 0.10 401.59 11.91 11.78 0.14 400.57 0.10 0.00 0.10 401.61 12.43 12.29 0.14 400.59 0.10 0.00 0.10 401.63 12.95 12.81 0.14 400.61 0.10 0.00 0.10 401.65 13.24 13.10 0.14 400.63 0.10 0.00 0.10 401.67 13.41 13.27 0.14 400.65 0.10 0.00 0.10 401.69 13.58 13.44 0.14 400.67 0.10 0.00 0.10 401.71 13.75 13.61 0.14 400.69 0.10 0.00 0.10 401.73 13.92 13.78 0.14 400.71 0.10 0.00 0.10 401.75 14.09 13.95 0.14 400.73 0.10 0.00 0.10 401.77 14.25 14.11 0.14 400.75 0.10 0.00 0.10 401.79 14.41 14.27 0.14 400.77 0.10 0.00 0.10 401.81 14.57 14.43 0.14 400.79 0.10 0.00 0.10 401.83 14.73 14.59 0.15 400.81 0.11 0.00 0.11 401.85 14.89 14.74 0.15 400.83 0.11 0.00 0.11 401.87 15.05 14.90 0.15 400.85 0.11 0.00 0.11 401.89 15.20 15.05 0.15 400.87 0.11 0.00 0.11 401.91 15.35 15.20 0.15 400.89 0.11 0.00 0.11 401.93 15.50 15.35 0.15 400.91 0.13 0.02 0.11 401.95 15.65 15.50 0.15 400.93 0.22 0.11 0.11 401.97 15.80 15.65 0.15 400.95 0.34 0.23 0.11 401.99 15.94 15.79 0.15 400.97 0.49 0.38 0.11 402.01 16.09 15.94 0.15 400.99 0.67 0.55 0.11 402.03 16.23 16.08 0.15 401.01 0.86 0.75 0.11 402.05 16.38 16.22 0.15 401.03 1.08 0.96 0.11 402.07 16.52 16.36 0.16 401.05 1.31 1.19 0.11 402.09 16.66 16.50 0.16 401.07 1.56 1.44 0.12 402.11 16.80 16.64 0.16 401.09 1.82 1.70 0.12 402.13 16.93 16.78 0.16 401.11 2.09 1.98 0.12 402.15 17.07 16.91 0.16 401.13 2.38 2.27 0.12 402.17 17.21 17.05 0.16 401.15 2.69 2.57 0.12 401.17 3.00 2.88 0.12 401.19 3.33 3.21 0.12 Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 20 Stage-Area-Storage for Pond 12P: Bioretention 1 Ponding Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 400.17 870 0 401.21 1,307 1,132 400.19 878 17 401.23 1.315 1,158 400.21 887 35 401.25 1,324 1,185 400.23 895 53 401.27 1,332 1,211 400.25 904 71 401.29 1,340 1,238 400.27 912 89 401.31 1,349 1,265 400.29 920 107 401.33 1,357 1,292 400.31 929 126 401.35 1,366 1,319 400.33 937 145 401.37 1,374 1,346 400.35 946 163 401.39 1,382 1,374 400.37 954 182 401.41 1,391 1,402 400.39 962 202 401.43 1,399 1,430 400.41 971 221 401.45 1,408 1,458 400.43 979 240 401.47 1,416 1,486 400.45 988 260 401.49 1,424 1,514 400.47 996 280 401.51 1,433 1,543 400.49 1,004 300 401.53 1,441 1,572 400.51 1,013 320 401.55 1,450 1,601 400.53 1,021 340 401.57 1,458 1,630 400.55 1,030 361 401.59 1,466 1,659 400.57 1,038 382 401.61 1,475 1,688 400.59 1,046 402 401.63 1,483 1,718 400.61 1,055 423 401.65 1,492 1,748 400.63 1,063 445 401.67 1,500 1,778 400.65 1,072 466 401.69 1,508 1,808 400.67 1,080 488 401.71 1,517 1,838 400.69 1,088 509 401.73 1,525 1,868 400.71 1,097 531 401.75 1,534 1,899 400.73 1,105 553 401.77 1,542 1,930 400.75 1,114 575 401.79 1,550 1,961 400.77 1,122 598 401.81 1,559 1,992 400.79 1,130 620 401.83 1,567 2,023 400.81 1,139 643 401.85 1,576 2,054 400.83 1,147 666 401.87 1,584 2,086 400.85 1,156 689 401.89 1,592 2,118 400.87 1,164 712 401.91 1,601 2,150 400.89 1,172 735 401.93 1,609 2,182 400.91 1,181 759 401.95 1,618 2,214 400.93 1,189 782 401.97 1,626 2,246 400.95 1,198 806 401.99 1,634 2,279 400.97 1,206 830 402.01 1,643 2,312 400.99 1,214 855 402.03 1,651 2,345 401.01 1,223 879 402.05 1,660 2,378 401.03 1,231 904 402.07 1,668 2,411 401.05 1,240 928 402.09 1,676 2,445 401.07 1,248 953 402.11 1,685 2,478 401.09 1,256 978 402.13 1,693 2,512 401.11 1,265 1,003 402.15 1.702 2,546 401.13 1,273 1,029 402.17 1,710 2,580 401.15 1,282 1,054 401.17 1,290 1,080 401.19 1,298 1,106 Storm Calcs-update 2-12-2020 Type l/ 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 21 Summary for Pond 13P: Bioretention 1 Media [44] Hint: Outlet device#1 is below defined storage Inflow = 0.12 cfs @ 11.99 hrs, Volume= 0.072 af Outflow = 0.12 cfs @ 12.00 hrs, Volume= 0.072 af, Atten= 0%, Lag= 0.7 min Primary = 0.12 cfs @ 12.00 hrs, Volume= 0.072 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 396.18' @ 12.00 hrs Surf.Area= 870 sf Storage= 4 cf Plug-Flow detention time=0.6 min calculated for 0.072 af(100% of inflow) Center-of-Mass det. time= 0.5 min ( 919.3 - 918.8 ) Volume Invert Avail.Storage Storage Description #1 396.17' 1,131 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 396.17 870 0.0 0 0 398.17 870 40.0 696 696 400.17 870 25.0 435 1,131 Device Routing Invert Outlet Devices #1 Primary 395.24' 4.0" Veil. Orifice/Grate C= 0.600 Primary OutFlow Max=0.37 cfs @ 12.00 hrs HW=396.18' (Free Discharge) 4-1=Orifice/Grate (Orifice Controls 0.37 cfs @ 4.24 fps) Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 22 Pond 13P: Bioretention 1 Media Hydrograph / ■Inflow 0.13_ 10.12 ch ■Primary 0.12- Peak Elev=396.18' 012th Storage=4 cf 0.09- 0.08- 2. 0.07- O 0.0• 6- LL 0.05: 0.04 0.03- 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 13P: Bioretention 1 Media Stage-Discharge 400 ■Primary 399 d c 0 398- d w 397- 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 0.8 0.85 0.9 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 23 Pond 13P: Bioretention 1 Media Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 0 Surfacel ■Storage 400 0 399 w o 0 398. m 397 Custom Stage Data 0 100 200 300 400 500 600 700 800 900 1,000 1,100 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 24 Hydrograph for Pond 13P: Bioretention 1 Media Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 396.17 0.00 0.50 0.00 0 396.17 0.00 1.00 0.00 0 396.17 0.00 1.50 0.00 0 396.17 0.00 2.00 0.00 0 396.17 0.00 2.50 0.00 0 396.17 0.00 3.00 0.00 0 396.17 0.00 3.50 0.00 0 396.17 0.00 4.00 0.00 0 396.17 0.00 4.50 0.00 0 396.17 0.00 5.00 0.00 0 396.17 0.00 5.50 0.00 0 396.17 0.00 6.00 0.00 0 396.17 0.00 6.50 0.00 0 396.17 0.00 7.00 0.00 0 396.17 0.00 7.50 0.00 0 396.17 0.00 8.00 0.00 0 396.17 0.00 8.50 0.00 0 396.17 0.00 9.00 0.00 0 396.17 0.00 9.50 0.00 0 396.17 0.00 10.00 0.00 0 396.17 0.00 10.50 0.01 0 396.17 0.01 11.00 0.03 1 396.17 0.03 11.50 0.08 3 396.18 0.08 12.00 0.12 4 396.18 0.12 12.50 0.11 4 396.18 0.11 13.00 0.11 4 396.18 0.11 13.50 0.11 4 396.18 0.11 14.00 0.11 4 396.18 0.11 14.50 0.11 4 396.18 0.11 15.00 0.11 4 396.18 0.11 15.50 0.11 4 396.18 0.11 16.00 0.10 4 396.18 0.10 16.50 0.10 4 396.18 0.10 17.00 0.10 4 396.18 0.10 17.50 0.09 3 396.18 0.09 18.00 0.09 3 396.18 0.09 18.50 0.09 3 396.18 0.09 19.00 0.09 3 396.18 0.09 19.50 0.08 3 396.18 0.08 20.00 0.04 1 396.17 0.04 Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 25 Stage-Discharge for Pond 13P: Bioretention 1 Media Elevation Primary Elevation Primary Elevation Primary I Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) (feet) (cfs) 396.17 0.00 397.21 0.56 398.25 0.71 399.29 0.83 396.19 0.37 397.23 0.57 398.27 0.71 399.31 0.83 396.21 0.38 397.25 0.57 398.29 0.71 399.33 0.83 396.23 0.38 397.27 0.57 398.31 0.72 399.35 0.83 396.25 0.39 397.29 0.58 398.33 0.72 399.37 0.84 396.27 0.39 397.31 0.58 398.35 0.72 399.39 0.84 396.29 0.39 397.33 0.58 398.37 0.72 399.41 0.84 396.31 0.40 397.35 0.59 398.39 0.73 399.43 0.84 396.33 0.40 397.37 0.59 398.41 0.73 399.45 0.84 396.35 0.41 397.39 0.59 398.43 0.73 399.47 0.85 396.37 0.41 397.41 0.59 398.45 0.73 399.49 0.85 396.39 0.42 397.43 0.60 398.47 0.74 399.51 0.85 396.41 0.42 397.45 0.60 398.49 0.74 399.53 0.85 396.43 0.43 397.47 0.60 398.51 0.74 399.55 0.86 396.45 0.43 397.49 0.61 398.53 0.74 399.57 0.86 396.47 0.43 397.51 0.61 398.55 0.74 399.59 0.86 396.49 0.44 397.53 0.61 398.57 0.75 399.61 0.86 396.51 0.44 397.55 0.62 398.59 0.75 399.63 0.86 396.53 0.45 397.57 0.62 398.61 0.75 399.65 0.87 396.55 0.45 397.59 0.62 398.63 0.75 399.67 0.87 396.57 0.45 397.61 0.62 398.65 0.76 399.69 0.87 396.59 0.46 397.63 0.63 398.67 0.76 399.71 0.87 396.61 0.46 397.65 0.63 398.69 0.76 ' 399.73 0.87 396.63 0.46 397.67 0.63 398.71 0.76 399.75 0.88 396.65 0.47 397.69 0.63 398.73 0.77 399.77 0.88 396.67 0.47 397.71 0.64 398.75 0.77 399.79 0.88 396.69 0.48 397.73 0.64 398.77 0.77 399.81 0.88 396.71 0.48 397.75 0.64 398.79 0.77 I 399.83 0.88 396.73 0.48 397.77 0.65 398.81 0.78 399.85 0.89 396.75 0.49 397.79 0.65 398.83 0.78 399.87 0.89 396.77 0.49 397.81 0.65 398.85 0.78 399.89 0.89 396.79 0.49 397.83 0.65 398.87 0.78 399.91 0.89 396.81 0.50 397.85 0.66 398.89 0.78 399.93 0.89 396.83 0.50 397.87 0.66 398.91 0.79 399.95 0.90 396.85 0.50 397.89 0.66 398.93 0.79 399.97 0.90 396.87 0.51 397.91 0.66 398.95 0.79 399.99 0.90 396.89 0.51 397.93 0.67 398.97 0.79 400.01 0.90 396.91 0.52 397.95 0.67 398.99 0.80 400.03 0.90 396.93 0.52 397.97 0.67 399.01 0.80 400.05 0.91 396.95 0.52 397.99 0.68 399.03 0.80 400.07 0.91 396.97 0.53 398.01 0.68 399.05 0.80 400.09 0.91 396.99 0.53 398.03 0.68 399.07 0.80 400.11 0.91 397.01 0.53 398.05 0.68 399.09 0.81 400.13 0.91 397.03 0.54 398.07 0.69 399.11 0.81 400.15 0.92 397.05 0.54 398.09 0.69 399.13 0.81 400.17 0.92 397.07 0.54 398.11 0.69 399.15 0.81 397.09 0.55 398.13 0.69 399.17 0.82 1 397.11 0.55 398.15 0.70 399.19 0.82 397.13 0.55 398.17 0.70 399.21 0.82 397.15 0.55 398.19 0.70 399.23 0.82 397.17 0.56 398.21 0.70 399.25 0.82 397.19 0.56 398.23 0.71 399.27 0.83 Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 26 Stage-Area-Storage for Pond 13P: Bioretention 1 Media Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 396.17 870 0 398.77 870 827 396.22 870 17 398.82 870 837 396.27 870 35 398.87 870 848 396.32 870 52 398.92 870 859 396.37 870 70 398.97 870 870 396.42 870 87 399.02 870 881 396.47 870 104 399.07 870 892 396.52 870 122 399.12 870 903 396.57 870 139 399.17 870 914 396.62 870 157 399.22 870 924 396.67 870 174 399.27 870 935 396.72 870 191 399.32 870 946 396.77 870 209 399.37 870 957 396.82 870 226 399.42 870 968 396.87 870 244 399.47 870 979 396.92 870 261 399.52 870 990 396.97 870 278 399.57 870 1,000 397.02 870 296 399.62 870 1,011 397.07 870 313 399.67 870 1,022 397.12 870 331 399.72 870 1,033 397.17 870 348 399.77 870 1,044 397.22 870 365 399.82 870 1,055 397.27 870 383 399.87 870 1,066 397.32 870 400 399.92 870 1,077 397.37 870 418 399.97 870 1,088 397.42 870 435 400.02 870 1,098 397.47 870 452 400.07 870 1,109 397.52 870 470 400.12 870 1,120 397.57 870 487 400.17 870 1,131 397.62 870 505 397.67 870 522 397.72 870 539 397.77 870 557 397.82 870 574 397.87 870 592 397.92 870 609 397.97 870 626 398.02 870 644 398.07 870 661 398.12 870 679 398.17 870 696 398.22 870 707 398.27 870 718 398.32 870 729 398.37 870 739 398.42 870 750 398.47 870 761 398.52 870 772 398.57 870 783 398.62 870 794 398.67 870 805 398.72 870 816 Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 27 Summary for Pond 15P: Bioretention 2 Ponding Inflow Area = 0.880 ac, 76.14% Impervious, Inflow Depth > 1.91" for 1 YR event Inflow = 3.17 cfs @ 11.96 hrs, Volume= 0.140 of Outflow = 2.60 cfs @ 12.00 hrs, Volume= 0.140 af, Atten= 18%, Lag= 2.6 min Primary = 2.41 cfs © 12.00 hrs, Volume= 0.044 af Secondary= 0.20 cfs @ 12.00 hrs, Volume= 0.096 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 399.79' @ 12.00 hrs Surf.Area= 2,132 sf Storage= 1,473 cf Plug-Flow detention time=28.2 min calculated for 0.140 af(100% of inflow) Center-of-Mass det. time=27.7 min ( 789.3 - 761.7 ) Volume Invert Avail.Storage Storage Description #1 399.00' 4,550 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 399.00 1,596 0 0 401.00 2,954 4,550 4,550 Device Routing Invert Outlet Devices #1 Secondary 399.00' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 1.00' #2 Primary 399.50' 18.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.40 cfs @ 12.00 hrs HW=399.79' (Free Discharge) t-2=Orifice/Grate (Weir Controls 2.40 cfs @ 1.76 fps) Secondary OutFlow Max=0.20 cfs @ 12.00 hrs HW=399.79' (Free Discharge) t-1=Exfiltration ( Controls 0.20 cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 28 Pond 15P: Bioretention 2 Ponding Hydrograph ■Inflow 3.17 cfs I El Outflow Inflow Area=0.880 ac ry ®Secondary Peak Elev=399.79' 2.60 c/ 3 Storage=1,473 cf 29 cfs 2 LL 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 15P: Bioretention 2 Ponding Stage-Discharge ,/. _.Total 401 MI Primary /. 0 Secondary / o 0 400- / .40// w 4 i Exfiftration / 399 0 1 2 3 4 5 6 7 8 9 10 Discharge (cis) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 29 Pond 15P: Bioretention 2 Ponding Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 ■Surface ■Storage 401 //% a 0 400 a � i o W I Custom Stage Data / 399 0 500 1 000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type l/ 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 30 Hydrograph for Pond 15P: Bioretention 2 Ponding Time Inflow Storage Elevation Outflow Primary Secondary (hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0 399.00 0.00 0.00 0.00 0.50 0.00 0 399.00 0.00 0.00 0.00 1.00 0.00 0 399.00 0.00 0.00 0.00 1.50 0.00 0 399.00 0.00 0.00 0.00 2.00 0.00 0 399.00 0.00 0.00 0.00 2.50 0.00 0 399.00 0.00 0.00 0.00 3.00 0.00 0 399.00 0.00 0.00 0.00 3.50 0.00 0 399.00 0.00 0.00 0.00 4.00 0.00 0 399.00 0.00 0.00 0.00 4.50 0.00 0 399.00 0.00 0.00 0.00 5.00 0.00 0 399.00 0.00 0.00 0.00 5.50 0.00 0 399.00 0.00 0.00 0.00 6.00 0.00 1 399.00 0.00 0.00 0.00 6.50 0.01 2 399.00 0.01 0.00 0.01 7.00 0.01 2 399.00 0.01 0.00 0.01 7.50 0.01 3 399.00 0.01 0.00 0.01 8.00 0.02 3 399.00 0.02 0.00 0.02 8.50 0.02 5 399.00 0.02 0.00 0.02 9.00 0.03 6 399.00 0.03 0.00 0.03 9.50 0.04 8 399.00 0.03 0.00 0.03 10.00 0.05 10 399.01 0.05 0.00 0.05 10.50 0.07 14 399.01 0.07 0.00 0.07 11.00 0.10 21 399.01 0.10 0.00 0.10 11.50 0.19 45 399.03 0.15 0.00 0.15 12.00 2.66 1,472 399.79 2.60 2.41 0.20 12.50 0.24 960 399.54 0.30 0.12 0.18 13.00 0.15 885 399.50 0.18 0.00 0.18 13.50 0.11 800 399.46 0.18 0.00 0.18 14.00 0.09 668 399.39 0.17 0.00 0.17 14.50 0.08 514 399.30 0.17 0.00 0.17 15.00 0.07 355 399.21 0.16 0.00 0.16 15.50 0.06 193 399.12 0.16 0.00 0.16 16.00 0.06 27 399.02 0.13 0.00 0.13 16.50 0.05 11 399.01 0.05 0.00 0.05 17.00 0.05 11 399.01 0.05 0.00 0.05 17.50 0.05 10 399.01 0.05 0.00 0.05 18.00 0.04 9 399.01 0.04 0.00 0.04 18.50 0.04 9 399.01 0.04 0.00 0.04 19.00 0.04 8 399.01 0.04 0.00 0.04 19.50 0.03 7 399.00 0.03 0.00 0.03 20.00 0.03 7 399.00 0.03 0.00 0.03 Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 31 Stage-Discharge for Pond 15P: Bioretention 2 Ponding Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary (feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfsj 399.00 0.00 0.00 0.00 400.04 6.33 6.11 0.21 399.02 0.15 0.00 0.15 400.06 6.58 6.37 0.21 399.04 0.15 0.00 0.15 400.08 6.70 6.48 0.22 399.06 0.15 0.00 0.15 400.10 6.81 6.59 0.22 399.08 0.15 0.00 0.15 400.12 6.92 6.70 0.22 399.10 0.15 0.00 0.15 400.14 7.03 6.81 0.22 399.12 0.16 0.00 0.16 400.16 7.13 6.91 0.22 399.14 0.16 0.00 0.16 400.18 7.24 7.02 0.22 399.16 0.16 0.00 0.16 400.20 7.34 7.12 0.22 399.18 0.16 0.00 0.16 400.22 7.44 7.22 0.23 399.20 0.16 0.00 0.16 400.24 7.55 7.32 0.23 399.22 0.16 0.00 0.16 400.26 7.65 7.42 0.23 399.24 0.16 0.00 0.16 400.28 7.74 7.51 0.23 399.26 0.16 0.00 0.16 400.30 7.84 7.61 0.23 399.28 0.17 0.00 0.17 400.32 7.94 7.71 0.23 399.30 0.17 0.00 0.17 400.34 8.03 7.80 0.23 399.32 0.17 0.00 0.17 400.36 8.12 7.89 0.23 399.34 0.17 0.00 0.17 400.38 8.22 7.98 0.24 399.36 0.17 0.00 0.17 400.40 8.31 8.07 0.24 399.38 0.17 0.00 0.17 400.42 8.40 8.16 0.24 399.40 0.17 0.00 0.17 400.44 8.49 8.25 0.24 399.42 0.17 0.00 0.17 400.46 8.58 8.34 0.24 399.44 0.18 0.00 0.18 400.48 8.66 8.42 0.24 399.46 0.18 0.00 0.18 400.50 8.75 8.51 0.24 399.48 0.18 0.00 0.18 400.52 8.84 8.59 0.24 399.50 0.18 0.00 0.18 400.54 8.92 8.68 0.25 399.52 0.22 0.04 0.18 400.56 9.01 8.76 0.25 399.54 0.31 0.12 0.18 400.58 9.09 8.84 0.25 399.56 0.41 0.23 0.18 400.60 9.17 8.92 0.25 399.58 0.53 0.35 0.18 400.62 9.26 9.00 0.25 399.60 0.67 0.49 0.19 400.64 9.34 9.08 0.25 399.62 0.83 0.64 0.19 400.66 9.42 9.16 0.25 399.64 1.00 0.81 0.19 400.68 9.50 9.24 0.25 399.66 1.18 0.99 0.19 400.70 9.58 9.32 0.26 399.68 1.37 1.18 0.19 400.72 9.66 9.40 0.26 399.70 1.57 1.38 0.19 400.74 9.73 9.47 0.26 399.72 1.78 1.59 0.19 400.76 9.81 9.55 0.26 399.74 2.01 1.81 0.19 400.78 9.89 9.63 0.26 399.76 2.24 2.04 0.20 400.80 9.96 9.70 0.26 399.78 2.48 2.28 0.20 400.82 10.04 9.78 0.26 399.80 2.73 2.53 0.20 400.84 10.11 9.85 0.26 399.82 2.99 2.79 0.20 400.86 10.19 9.92 0.27 399.84 3.26 3.05 0.20 400.88 10.26 10.00 0.27 399.86 3.53 3.33 0.20 400.90 10.34 10.07 0.27 399.88 3.81 3.61 0.20 400.92 10.41 10.14 0.27 399.90 4.10 3.90 0.20 400.94 10.48 10.21 0.27 399.92 4.40 4.19 0.21 400.96 10.55 10.28 0.27 399.94 4.70 4.50 0.21 400.98 10.62 10.35 0.27 399.96 5.02 4.81 0.21 401.00 10.70 10.42 0.27 399.98 5.33 5.12 0.21 400.00 5.66 5.45 0.21 400.02 5.99 5.78 0.21 Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 32 Stage-Area-Storage for Pond 15P: Bioretention 2 Ponding Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 399.00 1,596 0 400.04 2,302 2,027 399.02 1,610 32 400.06 2,316 2,073 399.04 1,623 64 400.08 2,329 2,120 399.06 1,637 97 400.10 2,343 2,166 399.08 1,650 130 400.12 2,356 2,213 399.10 1,664 163 400.14 2,370 2,261 399.12 1,677 196 400.16 2,384 2,308 399.14 1,691 230 400.18 2,397 2,356 399.16 1,705 264 400.20 2,411 2,404 399.18 1,718 298 400.22 2,424 2,452 399.20 1,732 333 400.24 2,438 2,501 399.22 1,745 368 400.26 2,452 2,550 399.24 1,759 403 400.28 2,465 2,599 399.26 1,773 438 400.30 2,479 2,649 399.28 1,786 473 400.32 2,492 2,698 399.30 1,800 509 400.34 2,506 2,748 399.32 1,813 545 400.36 2,519 2,798 399.34 1,827 582 400.38 2,533 2,849 399.36 1,840 619 400.40 2,547 2,900 399.38 1,854 656 400.42 2,560 2,951 399.40 1,868 693 400.44 2,574 3,002 399.42 1,881 730 400.46 2,587 3,054 399.44 1,895 768 400.48 2,601 3,106 399.46 1,908 806 400.50 2,615 3,158 399.48 1,922 844 400.52 2,628 3,210 399.50 1,936 883 400.54 2,642 3,263 399.52 1,949 922 400.56 2,655 3,316 399.54 1,963 961 400.58 2,669 3,369 399.56 1,976 1,000 400.60 2,682 3,423 399.58 1,990 1,040 400.62 2,696 3,477 399.60 2,003 1,080 400.64 2,710 3,531 399.62 2,017 1,120 400.66 2,723 3,585 399.64 2,031 1,160 400.68 2,737 3,639 399.66 2,044 1,201 400.70 2,750 3,694 399.68 2,058 1,242 400.72 2,764 3,749 399.70 2,071 1,284 400.74 2,777 3,805 399.72 2,085 1,325 400.76 2,791 3,861 399.74 2,098 1,367 400.78 2,805 3,917 399.76 2,112 1,409 400.80 2,818 3,973 399.78 2,126 1,451 400.82 2,832 4,029 399.80 2,139 1,494 400.84 2,845 4,086 399.82 2,153 1,537 400.86 2,859 4,143 399.84 2,166 1,580 400.88 2,873 4,200 399.86 2,180 1,624 400.90 2,886 4,258 399.88 2,194 1,667 400.92 2,900 4,316 399.90 2,207 1,711 400.94 2,913 4,374 399.92 2,221 1,756 400.96 2,927 4,432 399.94 2,234 1,800 400.98 2,940 4,491 399.96 2,248 1,845 401.00 2,954 4,550 399.98 2,261 1,890 400.00 2,275 1,936 400.02 2,289 1,981 Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 33 Summary for Pond 16P: Bioretention 2 Media Inflow = 0.20 cfs @ 12.00 hrs, Volume= 0.096 af Outflow = 0.19 cfs @ 12.17 hrs, Volume= 0.074 af, Atten= 6%, Lag= 10.1 min Primary = 0.19 cfs @ 12.17 hrs, Volume= 0.074 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 395.41' @ 12.17 hrs Surf.Area= 1,500 sf Storage= 995 cf Plug-Flow detention time= 123.4 min calculated for 0.074 af(78% of inflow) Center-of-Mass det. time=62.9 min ( 881.7 - 818.8 ) Volume Invert Avail.Storage Storage Description #1 393.75' 2,419 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 393.75 1,500 0.0 0 0 395.75 1,500 40.0 1,200 1,200 399.00 1,500 25.0 1,219 2,419 Device Routing Invert Outlet Devices #1 Primary 395.24' 4.0" Vert. Orifice/Grate X 3.00 C= 0.600 Primary OutFlow Max=0.18 cfs @ 12.17 hrs HW=395.41' (Free Discharge) L1=Orifice/Grate (Orifice Controls 0.18 cfs @ 1.40 fps) Pond 16P: Bioretention 2 Media ///� Hydrograph 0.22 ` ■Inflow II l 020 cfs ❑Primary 2= , Pe v ak Ele =395.41' o.,.. 0.19 ,- - - • -- °16 gtora a=995 cf , , 0.,7 g - 0.16 - / - 0.15 - - 10 0.14 - - r 0.13- �_ r 0.12 - . r 1 1 . . r - - 0` 0.11- ,- - - -,-- - o r, 0.1 . I I- 1I 5 0.08- ' . 0.07 - 0.06' ' r 0.05 0.04' ,- 0.03p - 0.02 , 0 . 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 34 Pond 16P: Bioretention 2 Media Stage-Discharge 399 •Primary 398 397 c 0 m 396 W 395 394 7 0 1 2 Discharge (cfs) Pond 16P: Bioretention 2 Media Stage-Area-Storage Surface/HorizontaUWetted Area(sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 D Surface . 1 I , ■Storage 399/ j 398 I397 T. 396 w 395- 394- , 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 Storage(cubic-feet) 9 _ 7/ N N O -1 r•C• O 00 CO 00 JJOO (T CTAA Ca CaNN -. --. O O CO C40000 --A J m 0) CT) CP A W W NN -, � 00 c . Q CD 0 O (TO (TOCTO (Ti0 (TO 'al 6ai0 (TO (TOCTO in O (T O 'al O CT O CT O U'i O Ui O in O CT O Ui O ( 3 O -C3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CD C) N 0-O co A CD0000000000 00000 - b -IN 0000000000000000000000000� �. 0 00000000 _ � � � � � -k .-, Nj .-, 0000000000000000000000p0 03X 0.) () A A -A. (T CT CT WO) 0) JJC) 0) 00p (TOJ ci (�) (.) N N - - - 0000000000000.�.� � N , ,.a v' 0 0. 7 N 7 U) I O) o N rn _ C c) (OOOCOCO (00 CO CO ( O --AO CO CO CO CO CO (0 c (T o.) N) N -� (D alQ W� N W W W Ca AAAA CO 00 (b CO CO CO CO co 03 CA CrJ CO CO N O -, 00 (TW -, CCD co 0 0 N - Cl.) (T Co O N A 0) N) Ut J (0 co N) Co A co A A 0 - co -. (n — (T U') co co N) O O O O O O O O O O O.-- (D um N O o N m °' O () () (a) C) 0JCJ () (aw (awwwwc. C„) (,,,) ( ( (,Jww (a (a (awC.1wwwwwww (awwwww it, T i (O CO CO CO CO CO CO CO CO (O CO CO CO CO (0 (p to (.O CO CO CO CO CO CO CO CO CO (O CO CO CO CO CO CO CO CO CO CO CO (O CO— (T (ncn (n (n (n (T (T (T (T (T (T (T (T (Tv, N (nAAAAAw (awww (aww (aww (aw (,Jwwww p a wW (s) WC.•) W WGJwW AAAAA :it. .00) AIV � O (O00Ooco -.l :NJ vvvvvvvvvvJ -.1 (D 0 ..,( 5 o - - N N N Co co (.fl O O O O O 0 N A O CO N N A CO A — 03 0) (T CT (T CT (T CT (T (T CT (T (T (T- o > • 0 a o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o p 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C) 0 0 0 0 n 3 Q) 00000000 o 0000000000000000000000 ov v -0 (v GJAAAA (T (n (T (TQ) OJJOo Co p0 p) O o o o 0 o 000000000000000000 •• fD o c_ - 0 CD = (n "t I- O r 3 n �y ^) a 3 Cr CD Q N 1 -a 5 Q CO N --., fl1 ill Ca Ti- er CD N N 0 01 o v Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 36 Stage-Discharge for Pond 16P: Bioretention 2 Media Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) 393.75 0.00 395.83 0.82 397.91 1.99 393.79 0.00 395.87 0.86 397.95 2.01 393.83 0.00 395.91 0.89 397.99 2.03 393.87 0.00 395.95 0.93 398.03 2.04 393.91 0.00 395.99 0.96 398.07 2.06 393.95 0.00 396.03 1.00 398.11 2.07 393.99 0.00 396.07 1.03 398.15 2.09 394.03 0.00 396.11 1.06 398.19 2.10 394.07 0.00 396.15 1.09 398.23 2.12 394.11 0.00 396.19 1.12 398.27 2.13 394.15 0.00 396.23 1.14 398.31 2.15 394.19 0.00 396.27 1.17 398.35 2.16 394.23 0.00 396.31 1.20 398.39 2.18 394.27 0.00 396.35 1.22 398.43 2.19 394.31 0.00 396.39 1.25 398.47 2.21 394.35 0.00 396.43 1.28 398.51 2.22 394.39 0.00 396.47 1.30 398.55 2.23 394.43 0.00 396.51 1.32 398.59 2.25 394.47 0.00 396.55 1.35 398.63 2.26 394.51 0.00 396.59 1.37 398.67 2.28 394.55 0.00 396.63 1.39 398.71 2.29 394.59 0.00 396.67 1.42 398.75 2.30 394.63 0.00 396.71 1.44 398.79 2.32 394.67 0.00 396.75 1.46 398.83 2.33 394.71 0.00 396.79 1.48 398.87 2.35 394.75 0.00 396.83 1.50 398.91 2.36 394.79 0.00 396.87 1.52 398.95 2.37 394.83 0.00 396.91 1.55 398.99 2.39 394.87 0.00 396.95 1.57 394.91 0.00 396.99 1.59 394.95 0.00 397.03 1.61 394.99 0.00 397.07 1.63 395.03 0.00 397.11 1.65 395.07 0.00 397.15 1.66 395.11 0.00 397.19 1.68 395.15 0.00 397.23 1.70 395.19 0.00 397.27 1.72 395.23 0.00 397.31 1.74 395.27 0.01 397.35 1.76 395.31 0.04 397.39 1.78 395.35 0.09 397.43 1.79 395.39 0.15 397.47 1.81 395.43 0.23 397.51 1.83 395.47 0.31 397.55 1.85 395.51 0.40 397.59 1.86 395.55 0.48 397.63 1.88 395.59 0.54 397.67 1.90 395.63 0.60 397.71 1.91 395.67 0.65 397.75 1.93 395.71 0.69 397.79 1.95 395.75 0.74 397.83 1.96 395.79 0.78 397.87 1.98 Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 37 Stage-Area-Storage for Pond 16P: Bioretention 2 Media Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 393.75 1,500 0 398.95 1,500 2,400 393.85 1,500 60 393.95 1,500 120 394.05 1,500 180 394.15 1,500 240 394.25 1,500 300 394.35 1,500 360 394.45 1,500 420 394.55 1,500 480 394.65 1,500 540 394.75 1,500 600 394.85 1,500 660 394.95 1,500 720 395.05 1,500 780 395.15 1,500 840 395.25 1,500 900 395.35 1,500 960 395.45 1,500 1,020 395.55 1,500 1,080 395.65 1,500 1,140 395.75 1,500 1,200 395.85 1,500 1,238 395.95 1,500 1,275 396.05 1,500 1,313 396.15 1,500 1,350 396.25 1,500 1,388 396.35 1,500 1,425 396.45 1,500 1,462 396.55 1,500 1,500 396.65 1,500 1,537 396.75 1,500 1,575 396.85 1,500 1,613 396.95 1,500 1,650 397.05 1,500 1,688 397.15 1,500 1,725 397.25 1,500 1,763 397.35 1,500 1,800 397.45 1,500 1,837 397.55 1,500 1,875 397.65 1,500 1,912 397.75 1,500 1,950 397.85 1,500 1,988 397.95 1,500 2,025 398.05 1,500 2,063 398.15 1,500 2,100 398.25 1,500 2,138 398.35 1,500 2,175 398.45 1,500 2,212 398.55 1,500 2,250 398.65 1,500 2,287 398.75 1,500 2,325 398.85 1,500 2,363 Storm Calcs-update 2-12-2020 Type l/ 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 38 Summary for Pond 18P: Modified SWM Facility [44] Hint: Outlet device #2 is below defined storage Inflow Area = 4.200 ac, 55.24% Impervious, Inflow Depth > 1.49" for 1 YR event Inflow = 8.67 cfs @ 12.01 hrs, Volume= 0.521 af Outflow = 2.51 cfs @ 12.33 hrs, Volume= 0.511 af, Atten= 71%, Lag= 19.1 min Primary = 2.51 cfs @ 12.33 hrs, Volume= 0.511 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs/ 3 Peak Elev= 392.29'@ 12.33 hrs Surf.Area= 3,476 sf Storage= 6,619 cf Plug-Flow detention time=33.8 min calculated for 0.511 af(98% of inflow) Center-of-Mass det. time=26.4 min ( 831.0 - 804.6 ) Volume Invert Avail.Storage Storage Description #1 390.05' 17,748 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 390.05 2,437 0 0 395.00 4,734 17,748 17,748 Device Routing Invert Outlet Devices #1 Primary 390.05' 24.0" Round Culvert L= 52.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 390.05'/ 389.75' S= 0.0058 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight& clean, Flow Area= 3.14 sf #2 Device 1 389.05' 7.0" W x 7.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 392.25' 24.0" W x 18.0" H Vert. Orifice/Grate C= 0.600 #4 Device 1 393.75' 24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=2.50 cfs © 12.33 hrs HW=392.29' (Free Discharge) L1=Culvert (Passes 2.50 cfs of 15.37 cfs potential flow) I2=Orifice/Grate (Orifice Controls 2.45 cfs @ 7.20 fps) 3=Orifice/Grate (Orifice Controls 0.05 cfs @ 0.63 fps) 4=Orifice/Grate ( Controls 0.00 cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 39 Pond 18P: Modified SWM Facility Hydrograph / ■Inflow 18 67 cfs I ■Primary 9 Inflow Area=4.200 ac 8 Peak EIev=392.29' 7 Storage=6,619 cf 6- 5- _; 0 LL 4_ 3 1251 ors 2- 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 18P: Modified SWM Facility Stage-Discharge 395 •Primary 394- dl. 393 m c ° Ori/icdGrate w 392 391 Cuiil _ 0 2 4 6 8 .10' 12 '14 r 24 26 28 30 Discharge (cfs) Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 40 Pond 18P: Modified SWM Facility Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 0 Surface ■Storage 395 394- w 393— c - 0 W w 392- 391- Custom Stage Data / r//0,07 0 2,000 4000 6,000 8,000 10,000 12,000 14,000 16,000 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 1124-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 41 Hydrograph for Pond 18P: Modified SWM Facility Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 390.05 0.00 0.50 0.00 0 390.05 0.00 1.00 0.00 0 390.05 0.00 1.50 0.00 0 390.05 0.00 2.00 0.00 0 390.05 0.00 2.50 0.00 0 390.05 0.00 3.00 0.00 0 390.05 0.00 3.50 0.00 0 390.05 0.00 4.00 0.00 0 390.05 0.00 4.50 0.00 0 390.05 0.00 5.00 0.00 0 390.05 0.00 5.50 0.00 0 390.05 0.00 6.00 0.00 0 390.05 0.00 6.50 0.00 3 390.05 0.00 7.00 0.01 12 390.06 0.00 7.50 0.01 30 390.06 0.00 8.00 0.02 54 390.07 0.01 8.50 0.03 86 390.08 0.01 9.00 0.04 131 390.10 0.01 9.50 0.06 180 390.12 0.03 10.00 0.07 225 390.14 0.04 10.50 0.11 288 390.17 0.07 11.00 0.19 380 390.20 0.13 11.50 0.36 531 390.26 0.25 12.00 8.58 2,807 391.10 1.68 12.50 1.51 6,304 392.20 2.40 13.00 0.73 4,105 391.53 1.99 13.50 0.58 2,141 390.87 1.48 14.00 0.50 973 390.44 0.78 14.50 0.46 765 390.35 0.50 15.00 0.43 724 390.34 0.45 15.50 0.41 700 390.33 0.42 16.00 0.38 676 390.32 0.39 16.50 0.27 595 390.29 0.31 17.00 0.26 556 390.27 0.27 17.50 0.24 538 390.27 0.25 18.00 0.23 524 390.26 0.24 18.50 0.22 511 390.26 0.23 19.00 0.21 498 390.25 0.22 19.50 0.20 484 390.25 0.20 20.00 0.14 439 390.23 0.17 Storm Calcs-update 2-12-2020 Type II 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 42 Stage-Discharge for Pond 18P: Modified SWM Facility Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 390.05 0.00 392.65 4.27 390.10 0.01 392.70 4.61 390.15 0.05 392.75 4.96 390.20 0.12 392.80 5.34 390.25 0.21 392.85 5.73 390.30 0.33 392.90 6.13 390.35 0.48 392.95 6.55 390.40 0.65 393.00 6.98 390.45 0.83 393.05 7.43 390.50 1.04 393.10 7.89 390.55 1.16 393.15 8.37 390.60 1.22 393.20 8.85 390.65 1.27 393.25 9.35 390.70 1.32 393.30 9.86 390.75 1.37 393.35 10.38 390.80 1.42 393.40 10.92 390.85 1.47 393.45 11.46 390.90 1.51 393.50 12.02 390.95 1.55 393.55 12.58 391.00 1.60 393.60 13.16 391.05 1.64 393.65 13.74 391.10 1.68 393.70 14.34 391.15 1.72 393.75 14.95 391.20 1.76 393.80 15.78 391.25 1.79 393.85 16.81 391.30 1.83 393.90 17.97 391.35 1.87 393.95 19.23 391.40 1.90 394.00 20.59 391.45 1.94 394.05 22.02 391.50 1.97 394.10 23.54 391.55 2.01 394.15 25.13 391.60 2.04 394.20 26.78 391.65 2.07 394.25 27.06 391.70 2.10 394.30 27.27 391.75 2.14 394.35 27.48 391.80 2.17 394.40 27.69 391.85 2.20 394.45 27.89 391.90 2.23 394.50 28.10 391.95 2.26 394.55 28.30 392.00 2.29 394.60 28.50 392.05 2.32 394.65 28.70 392.10 2.35 394.70 28.90 392.15 2.37 394.75 29.10 392.20 2.40 394.80 29.29 392.25 2.43 394.85 29.49 392.30 2.53 394.90 29.68 392.35 2.69 394.95 29.87 392.40 2.88 395.00 30.06 392.45 3.11 392.50 3.37 392.55 3.65 392.60 3.95 Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 43 Stage-Area-Storage for Pond 18P: Modified SWM Facility Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 390.05 2,437 0 392.65 3,644 7,905 390.10 2,460 122 392.70 3,667 8,087 390.15 2,483 246 392.75 3,690 8,271 390.20 2,507 371 392.80 3,713 8,456 390.25 2,530 497 392.85 3,736 8,643 390.30 2,553 624 392.90 3,760 8,830 390.35 2,576 752 392.95 3,783 9,019 390.40 2,599 881 393.00 3,806 9,208 390.45 2,623 1,012 393.05 3,829 9,399 390.50 2,646 1,144 393.10 3,852 9,591 390.55 2,669 1,277 393.15 3,876 9,784 390.60 2,692 1,411 393.20 3,899 9,979 390.65 2,715 1,546 393.25 3,922 10,174 390.70 2,739 1,682 393.30 3,945 10,371 390.75 2,762 1,820 393.35 3,968 10,569 390.80 2,785 1,958 393.40 3,992 10,768 390.85 2,808 2,098 393.45 4,015 10,968 390.90 2,831 2,239 393.50 4,038 11,169 390.95 2,855 2,381 393.55 4,061 11,372 391.00 2,878 2,525 393.60 4,084 11,575 391.05 2,901 2,669 393.65 4,108 11,780 391.10 2,924 2,815 393.70 4,131 11,986 391.15 2,947 2,961 393.75 4,154 12,193 391.20 2,971 3,109 393.80 4,177 12,402 391.25 2,994 3,259 393.85 4,200 12,611 391.30 3,017 3,409 393.90 4,224 12,822 391.35 3,040 3,560 393.95 4,247 13,033 391.40 3,063 3,713 394.00 4,270 13,246 391.45 3,087 3,867 394.05 4,293 13,460 391.50 3,110 4,021 394.10 4,316 13,676 391.55 3,133 4,178 394.15 4,340 13,892 391.60 3,156 4,335 394.20 4,363 14,110 391.65 3,179 4,493 394.25 4,386 14,328 391.70 3,203 4,653 394.30 4,409 14,548 391.75 3,226 4,813 394.35 4,432 14,769 391.80 3,249 4,975 394.40 4,456 14,991 391.85 3,272 5,138 394.45 4,479 15,215 391.90 3,295 5,303 394.50 4,502 15,439 391.95 3,319 5,468 394.55 4,525 15,665 392.00 3,342 5,634 394.60 4,548 15,892 392.05 3,365 5,802 394.65 4,572 16,120 392.10 3,388 5,971 394.70 4,595 16,349 392.15 3,411 6,141 394.75 4,618 16,579 392.20 3,435 6,312 394.80 4,641 16,811 392.25 3,458 6,484 394.85 4,664 17,043 392.30 3,481 6,658 394.90 4,688 17,277 392.35 3,504 6,832 394.95 4,711 17,512 392.40 3,527 7,008 395.00 4,734 17,748 392.45 3,551 7,185 392.50 3,574 7,363 392.55 3,597 7,543 392.60 3,620 7,723 Storm Calcs-update 2-12-2020 Type 11 24-hr 1 YR Rainfall=2.87" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 44 Summary for Link 20L: Post Analysis Point 1 Inflow Area = 4.300 ac, 55.58% Impervious, Inflow Depth > 1.47" for 1 YR event Inflow = 2.60 cfs @ 12.31 hrs, Volume= 0.526 af Primary = 2.60 cfs @ 12.31 hrs, Volume= 0.526 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Link 20L: Post Analysis Point 1 Hydrograph .:I Inflow 12.9 crs 0 Primary Inflow Area=4.300 ac 12.60 cfs / 2 O A LL 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 90.0 00.0 90 0 OZ'O I. 90.0 00.0 90'0 00.01 P0.0 00 0 V0'0 09.6 LVO 00'0 LL'0 00•0Z 170•0 00'0 PO 0 09.6 6 L'0 00.0 61:0 02.61. £0.0 00'0 £0'0 OV.6 1•Z'0 00.0 LZ.O 09.61. 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OP.E L 00.0 00.0 00'0 00.E 1.2.1. 00'0 1.8'L OZ'E L 00'0 00.0 00.0 08.Z 1.02 00'0 1.0.Z 00 EL 00.0 00.0 00.0 09.Z OZ.Z 00'0 OZ.Z 08•ZL 00.0 00.0 00.0 017.Z 8£'Z 00.0 9C.Z 09.Z1. 00.0 00'0 00'0 OZ'Z £S'Z 00.0 £S'Z 017.Z1. 00.0 00'0 00'0 00.Z 9S'Z 00'0 9S'Z OZ'ZL 00'0 00'0 00'0 08L 99'L 00.0 99.1. 00.Z I. 00.0 00.0 00'0 09'L 99.0 00'0 99.0 09.1.1. 00.0 00.0 00'0 OP'L LE 0 00'0 1.E.0 09.1.1. 00.0 00.0 00'0 OZ'L ZZ'0 00.0 ZZ'0 OV'L L 00'0 00.0 00.0 00.1. L L'0 00 0 L L'0 OZ'L L 00'0 00.0 00.0 09.0 £L'0 00'0 £L:0 00'L L 00'0 00'0 00.0 09.0 L L:0 00 0 L L'0 08'0 L 00.0 00.0 00.0 OV.O 60.0 00'0 60'0 09.01. 00'0 00'0 00'0 OZ O L0.0 00'0 L0.0 OV.0 L 00.0 00'0 00'0 00.0 (sp) (taa;) (sp) NJ flop) (sp) (laa;) (sp) (sanoy) Ajewud uoitenei] mogul awil A.iewud uogena9 mop' awil 1, luiod s!sAleuy lsod :10Z )lui1 ao1. gdea6oapAH 917 abed 0-11 suoRnlos aaenos OVOOJPAH 6 l0Z© E9980 Ws 9Z-00'0 L ®OVOO-JPAH OZOZ/E L/Z PatuPd dnoao suowwil Aq paiedaad „LSZ=lleJU!ea ea d it -t7Z /l adAj OZOZ-Zi-Z alepdn-sa1e3 waolS Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 46 Time span=0.00-20.00 hrs, dt=0.01 hrs, 2001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl l S: Bioretention 1 Area Runoff Area=1.340 ac 23.88% Impervious Runoff Depth>1.48" Tc=5.0 min CN=80 Runoff=4.02 cfs 0.165 af Subcatchment14S: Bioretention 2 Area Runoff Area=0.880 ac 76.14% Impervious Runoff Depth>2.45" Tc=5.0 min CN=92 Runoff=3.99 cfs 0.179 af Subcatchment17S: Remaining Post SWM Runoff Area=1.980 ac 67.17% Impervious Runoff Depth>2.25" Flow Length=400' Tc=17.6 min CN=90 Runoff=5.64 cfs 0.372 af Subcatchment19S: Post Unrouted Area Runoff Area=0.100 ac 70.00% Impervious Runoff Depth>2.34" Flow Length=400' Tc=17.6 min CN=91 Runoff=0.29 cfs 0.020 af Pond 12P: Bioretention1 Ponding Peak EIev=401.22' Storage=1,147 cf Inflow=4.02 cfs 0.165 af Primary=3.74 cfs 0.081 af Secondary=0.12 cfs 0.080 af Outflow=3.86 cfs 0.160 af Pond 13P: Bioretention 1 Media Peak Elev=396.18' Storage=4 cf Inflow=0.12 cfs 0.080 af Outflow=0.12 cfs 0.080 af Pond 15P: Bioretention2 Ponding Peak Elev=399.86' Storage=1,621 cf Inflow=3.99 cfs 0.179 af Primary=3.31 cfs 0.068 af Secondary=0.20 cfs 0.111 af Outflow=3.52 cfs 0.179 af Pond 16P: Bioretention2 Media Peak EIev=395.41' Storage=998 cf Inflow=0.20 cfs 0.111 af Outflow=0.20 cfs 0.090 af Pond 18P: Modified SWM Facility Peak EIev=392.79' Storage=8,414 cf Inflow=11.64 cfs 0.690 af Outflow=5.25 cfs 0.678 af Link 20L: Post Analysis Point 1 Inflow=5.46 cfs 0.698 af Primary=5.46 cfs 0.698 af Total Runoff Area = 4.300 ac Runoff Volume = 0.736 af Average Runoff Depth = 2.05" 44.42% Pervious = 1.910 ac 55.58% Impervious = 2.390 ac Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 47 Summary for Subcatchment 11S: Bioretention 1 Area Runoff = 4.02 cfs @ 11.96 hrs, Volume= 0.165 af, Depth> 1.48" Runoff by SCS TR-20 method, UH=SCS, Weighted-ON, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 2 YR Rainfall=3.47" Area (ac) CN Description 0.320 98 Paved parking, HSG C 1.000 74 >75% Grass cover, Good, HSG C 0.020 77 Woods, Poor, HSG C 1.340 80 Weighted Average 1.020 76.12% Pervious Area 0.320 23.88% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 11S: Bioretention 1 Area Hydrograph ❑Runoff' i..o2 Os I 4 Type II 24-hr 2 YR Rainfall=3.47" Runoff Area=1.340 ac 3 Runoff Volume=0.165 of Runoff Depth>1.48" LL 2 Tc=5.0 min CN=80 1- 0- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 0 00 N V O C6 N II M M d "� CN cc MD cc E N M L.. a) -.0 Q 4 N v- 0 N M V Lo CD OMN � CT (D ) 0 NC CO CD10 NNN � .- 000C OO CO CDC CD N N N- N N N- CD CO CO CD CD CD 10101010 CD '47, O4 00000 .- NC") ef Lo V NN N 00000000000000000000000 gl- v 5 0 0 0 0 0 0 0 ' M O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 0 4, J a __IL Cn O O m m NM V Ln I- 000L0 V 0 V 00 V NO) N V LC") NO - N V COCOO) Or- M V LC) CDI- COm0 NM V V Lo CDI- I� 00 O M N O O O 0 O O N I� 00 0) 0 0) O o 0 O N C V N N N C V N M M M M M CM M M M V V V V V V 7 Cl) UL OOOOOOoo00o00 O r- X O Cn W .0 U) — f6 C 0) co N- N N- V COO) O N N COM CON CD 0) N LON- CY) NV- CD00 O N V «) I- CO 0 ,- Ind- CD N- CA (DI- NCO V LOCD N- 000) O d 0' 0 . CD I- C- CD0) O V M V Lt) «) CDCDN- N- N- C CDC6) C) C) 0) 000000 ,—t- '- ,—'- .- c- NNNNNNNNNN F) O E U 000000 - c-- NNNNNNNNNNNNNN N N N M CM M M M M M M CM M M M CO M M M M ,6 M M M C7 Ch C") 0 0 - U v W �OO00000OOOOoCO000CO000000000000000000000000000000 V COCOON V COCOON V COCOON V COCOON V CDo00 (N V COCOON V COCOON V COCOON V COCOON V CD000 H O 000 N N N N N CO M CO CO M V Ni Ni Ni Ni L.C) L.C) C.nu) LC) 000DCDCD CO N- I- C` N C` 000000 cO CO 0) 0) 60) 0) CD N . . . . � � 4- .- .- - .- - - ,- .- c- . . . . . . . . . . . . . . . . r- .- r- . . . � ,- .- . . . . . . N 10 I L O M N N 'C 0 ,— 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O N 2 7 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N CI M pr `oD O N ` L Uo W � � >` U �00000000000000000000000000000000000000000000000000 � � cc 2 00000000000000000000000000000000000000000000000000000 o or0000000000000000000000000000000000000000000000000000 Q. E N W .c ?• EO OH 0 a�CP .- NM V V LOOOO000 ci ,- NMV LOCDI- 000) O ,- NM V Lor- MMONM V COIF Mo NMinr-- 0) ,- MLf) COOM (D U >sO 0000000000000 NNNNNNNNNMMMMMMMV V V V V V LnLo Ln Low66 U 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 a Emu a) --Oo000o0000000000000000000000000000000000000000000000 - QO E N ON COCOON V COCOON V COCOON V COCOON V COCOON V COCOON V COCOON V COCOON V CDDON V COCOON O UJ 'D 8 00000 N N N N N M CO M M M Ni Ni Ni Ni Ni 1010 Lr5In Lf766666 N- f- I` N N CO 06 CA CO CO O) 0) 0) O) 0) 00 U) dI Storm Calcs-update 2-12-2020 Type 11 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 49 Summary for Subcatchment 14S: Bioretention 2 Area Runoff = 3.99 cfs @ 11.96 hrs, Volume= 0.179 af, Depth> 2.45" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 2 YR Rainfall=3.47" Area (ac) CN Description 0.670 98 Paved parking, HSG C 0.160 74 >75% Grass cover, Good, HSG C 0.050 77 Woods, Poor, HSG C 0.880 92 Weighted Average 0.210 23.86% Pervious Area 0.670 76.14% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 14S: Bioretention 2 Area Hydrograph ❑Runoff assr�� Type II 24-hr 2 YR Rainfall=3.47" Runoff Area=0.880 ac / 3 Runoff Volume=0.179 af Runoff Depth>2.45" 2 Tc=5.0 min • CN=92 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type l/ 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 50 Hydrograph for Subcatchment 14S: Bioretention 2 Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 0.69 0.19 0.09 0.20 0.01 0.00 0.00 10.60 0.73 0.21 0.10 0.40 0.01 0.00 0.00 10.80 0.77 0.24 0.12 0.60 0.02 0.00 0.00 11.00 0.82 0.27 0.14 0.80 0.03 0.00 0.00 11.20 0.87 0.31 0.18 1.00 0.04 0.00 0.00 11.40 0.94 0.36 0.22 1.20 0.04 0.00 0.00 11.60 1.06 0.45 0.43 1.40 0.05 0.00 0.00 11.80 1.49 0.80 1.64 1.60 0.06 0.00 0.00 12.00 2.30 1.51 3.34 1.80 0.07 0.00 0.00 12.20 2.42 1.62 0.50 2.00 0.08 0.00 0.00 12.40 2.52 1.71 0.36 2.20 0.08 0.00 0.00 12.60 2.58 1.77 0.25 2.40 0.09 0.00 0.00 12.80 2.63 1.82 0.22 2.60 0.10 0.00 0.00 13.00 2.68 1.86 0.19 2.80 0.11 0.00 0.00 13.20 2.72 1.90 0.17 3.00 0.12 0.00 0.00 13.40 2.76 1.93 0.15 3.20 0.13 0.00 0.00 13.60 2.79 1.96 0.13 3.40 0.14 0.00 0.00 13.80 2.82 1.99 0.12 3.60 0.15 0.00 0.00 14.00 2.85 2.02 0.11 3.80 0.16 0.00 0.00 14.20 2.87 2.04 0.10 4.00 0.17 0.00 0.00 14.40 2.89 2.06 0.10 4.20 0.18 0.00 0.00 14.60 2.92 2.08 0.10 4.40 0.19 0.00 0.00 14.80 2.94 2.10 0.09 4.60 0.20 0.00 0.00 15.00 2.96 2.12 0.09 4.80 0.21 0.00 0.00 15.20 2.98 2.14 0.08 5.00 0.22 0.00 0.00 15.40 3.00 2.16 0.08 5.20 0.23 0.00 0.01 15.60 3.02 2.18 0.08 5.40 0.24 0.00 0.01 15.80 3.04 2.20 0.07 5.60 0.25 0.01 0.01 16.00 3.05 2.21 0.07 5.80 0.27 0.01 0.01 16.20 3.07 2.23 0.07 6.00 0.28 0.01 0.01 16.40 3.08 2.24 0.06 6.20 0.29 0.01 0.01 16.60 3.10 2.26 0.06 6.40 0.30 0.02 0.01 16.80 3.11 2.27 0.06 6.60 0.32 0.02 0.01 17.00 3.13 2.28 0.06 6.80 0.33 0.02 0.02 17.20 3.14 2.30 0.06 7.00 0.34 0.03 0.02 17.40 3.16 2.31 0.06 7.20 0.36 0.03 0.02 17.60 3.17 2.32 0.06 7.40 0.37 0.04 0.02 17.80 3.18 2.33 0.05 7.60 0.39 0.04 0.02 18.00 3.20 2.35 0.05 7.80 0.40 0.05 0.02 18.20 3.21 2.36 0.05 8.00 0.42 0.05 0.03 18.40 3.22 2.37 0.05 8.20 0.43 0.06 0.03 18.60 3.23 2.38 0.05 8.40 0.45 0.07 0.03 18.80 3.24 2.39 0.05 8.60 0.47 0.07 0.04 19.00 3.25 2.40 0.05 8.80 0.49 0.08 0.04 19.20 3.26 2.41 0.04 9.00 0.51 0.09 0.05 19.40 3.27 2.42 0.04 9.20 0.53 0.10 0.05 19.60 3.28 2.43 0.04 9.40 0.55 0.12 0.05 19.80 3.29 2.44 0.04 9.60 0.58 0.13 0.05 20.00 3.30 2.45 0.04 9.80 0.60 0.14 0.06 10.00 0.63 0.16 0.07 10.20 0.66 0.17 0.08 Storm Calcs-update 2-12-2020 Type l/ 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 51 Summary for Subcatchment 17S: Remaining Post SWM Facility Drainage Area Runoff = 5.64 cfs @ 12.10 hrs, Volume= 0.372 af, Depth> 2.25" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 2 YR Rainfall=3.47" Area (ac) CN Description 1.330 98 Paved parking, HSG C 0.650 74 >75% Grass cover, Good, HSG C 0.000 66 Woods, Poor, HSG B 1.980 90 Weighted Average 0.650 32.83% Pervious Area 1.330 67.17% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 0.3 200 0.0200 9.68 11.88 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.010 PVC, smooth interior 17.6 400 Total Subcatchment 17S: Remaining Post SWM Facility Drainage Area Hydrograph ❑Runoff` 6 15.64 cis Type 1124-h r 21 T / 5 YI Rainfall=3.47" 0 Runoff Area=1.980 ac 4 Runoff Volume=0.372 af Runoff Depth>2.25" / 3 Flow Length=400' Tc_17.6 min 2 CN=90 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 52 Hydrograph for Subcatchment 17S: Remaining Post SWM Facility Drainage Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 0.69 0.14 0.14 0.20 0.01 0.00 0.00 10.60 0.73 0.16 0.17 0.40 0.01 0.00 0.00 10.80 0.77 0.18 0.19 0.60 0.02 0.00 0.00 11.00 0.82 0.21 0.23 0.80 0.03 0.00 0.00 11.20 0.87 0.24 0.28 1.00 0.04 0.00 0.00 11.40 0.94 0.28 0.35 1.20 0.04 0.00 0.00 11.60 1.06 0.36 0.46 1.40 0.05 0.00 0.00 11.80 1.49 0.68 1.30 1.60 0.06 0.00 0.00 12.00 2.30 1.35 4.38 1.80 0.07 0.00 0.00 12.20 2.42 1.46 4.28 2.00 0.08 0.00 0.00 12.40 2.52 1.55 1.64 2.20 0.08 0.00 0.00 12.60 2.58 1.60 0.89 2.40 0.09 0.00 0.00 12.80 2.63 1.65 0.59 2.60 0.10 0.00 0.00 13.00 2.68 1.69 0.48 2.80 0.11 0.00 0.00 13.20 2.72 1.73 0.41 3.00 0.12 0.00 0.00 13.40 2.76 1.76 0.36 3.20 0.13 0.00 0.00 13.60 2.79 1.79 0.33 3.40 0.14 0.00 0.00 13.80 2.82 1.82 0.29 3.60 0.15 0.00 0.00 14.00 2.85 1.84 0.27 3.80 0.16 0.00 0.00 14.20 2.87 1.87 0.24 4.00 0.17 0.00 0.00 14.40 2.89 1.89 0.23 4.20 0.18 0.00 0.00 14.60 2.92 1.91 0.22 4.40 0.19 0.00 0.00 14.80 2.94 1.93 0.21 4.60 0.20 0.00 0.00 15.00 2.96 1.95 0.20 4.80 0.21 0.00 0.00 15.20 2.98 1.97 0.19 5.00 0.22 0.00 0.00 15.40 3.00 1.99 0.18 5.20 0.23 0.00 0.00 15.60 3.02 2.00 0.18 5.40 0.24 0.00 0.00 15.80 3.04 2.02 0.17 5.60 0.25 0.00 0.00 16.00 3.05 2.03 0.16 5.80 0.27 0.00 0.01 16.20 3.07 2.05 0.15 6.00 0.28 0.00 0.01 16.40 3.08 2.06 0.15 6.20 0.29 0.00 0.01 16.60 3.10 2.08 0.14 6.40 0.30 0.01 0.01 16.80 3.11 2.09 0.14 6.60 0.32 0.01 0.02 17.00 3.13 2.10 0.14 6.80 0.33 0.01 0.02 17.20 3.14 2.12 0.13 7.00 0.34 0.01 0.02 17.40 3.16 2.13 0.13 7.20 0.36 0.01 0.02 17.60 3.17 2.14 0.13 7.40 0.37 0.02 0.03 17.80 3.18 2.15 0.12 7.60 0.39 0.02 0.03 18.00 3.20 2.16 0.12 7.80 0.40 0.02 0.03 18.20 3.21 2.18 0.12 8.00 0.42 0.03 0.04 18.40 3.22 2.19 0.11 8.20 0.43 0.03 0.04 18.60 3.23 2.20 0.11 8.40 0.45 0.04 0.05 18.80 3.24 2.21 0.11 8.60 0.47 0.04 0.05 19.00 3.25 2.22 0.10 8.80 0.49 0.05 0.06 19.20 3.26 2.23 0.10 9.00 0.51 0.06 0.07 19.40 3.27 2.24 0.10 9.20 0.53 0.07 0.08 19.60 3.28 2.25 0.09 9.40 0.55 0.08 0.08 19.80 3.29 2.26 0.09 9.60 0.58 0.09 0.09 20.00 3.30 2.26 0.09 9.80 0.60 0.10 0.10 10.00 0.63 0.11 0.11 10.20 0.66 0.12 0.12 Storm Calcs-update 2-12-2020 Type 1124-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 53 Summary for Subcatchment 19S: Post Unrouted Area Runoff = 0.29 cfs @ 12.10 hrs, Volume= 0.020 af, Depth> 2.34" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 2 YR Rainfall=3.47" Area (ac) CN Description 0.070 98 Paved parking, HSG C 0.030 74 >75% Grass cover, Good, HSG C 0.000 66 Woods, Poor, HSG B 0.100 91 Weighted Average 0.030 30.00% Pervious Area 0.070 70.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 0.3 200 0.0200 9.68 11.88 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.010 PVC, smooth interior 17.6 400 Total Subcatchment 19S: Post Unrouted Area Hydrograph 0.32 / ❑Runoff` 0.29 cfs 0.3 0.28 Type 11,24 hr, 0.26 2 YR Rainfall=a.4 '" 0.24- Runoff-Area=GA-00 ac 0.22 0.2 RunoffVolume=0.020 of 4 0.18 Runoff-Depth>2.34" 0.1 0.14 Flow Length=400' 0 • 0.12 Tc=17.6min 0.1 CN=91 0.08 0.0s 0.04 o` 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 54 Hydrograph for Subcatchment 19S: Post Unrouted Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 0.69 0.16 0.01 0.20 0.01 0.00 0.00 10.60 0.73 0.18 0.01 0.40 0.01 0.00 0.00 10.80 0.77 0.21 0.01 0.60 0.02 0.00 0.00 11.00 0.82 0.24 0.01 0.80 0.03 0.00 0.00 11.20 0.87 0.27 0.02 1.00 0.04 0.00 0.00 11.40 0.94 0.32 0.02 1.20 0.04 0.00 0.00 11.60 1.06 0.40 0.02 1.40 0.05 0.00 0.00 11.80 1.49 0.74 0.07 1.60 0.06 0.00 0.00 12.00 2.30 1.43 0.23 1.80 0.07 0.00 0.00 12.20 2.42 1.54 0.22 2.00 0.08 0.00 0.00 12.40 2.52 1.63 0.08 2.20 0.08 0.00 0.00 12.60 2.58 1.68 0.05 2.40 0.09 0.00 0.00 12.80 2.63 1.73 0.03 2.60 0.10 0.00 0.00 13.00 2.68 1.77 0.02 2.80 0.11 0.00 0.00 13.20 2.72 1.81 0.02 3.00 0.12 0.00 0.00 13.40 2.76 1.84 0.02 3.20 0.13 0.00 0.00 13.60 2.79 1.87 0.02 3.40 0.14 0.00 0.00 13.80 2.82 1.90 0.02 3.60 0.15 0.00 0.00 14.00 2.85 1.93 0.01 3.80 0.16 0.00 0.00 14.20 2.87 1.95 0.01 4.00 0.17 0.00 0.00 14.40 2.89 1.97 0.01 4.20 0.18 0.00 0.00 14.60 2.92 1.99 0.01 4.40 0.19 0.00 0.00 14.80 2.94 2.02 0.01 4.60 0.20 0.00 0.00 15.00 2.96 2.04 0.01 4.80 0.21 0.00 0.00 15.20 2.98 2.05 0.01 5.00 0.22 0.00 0.00 15.40 3.00 2.07 0.01 5.20 0.23 0.00 0.00 15.60 3.02 2.09 0.01 5.40 0.24 0.00 0.00 15.80 3.04 2.11 0.01 5.60 0.25 0.00 0.00 16.00 3.05 2.12 0.01 5.80 0.27 0.00 0.00 16.20 3.07 2.14 0.01 6.00 0.28 0.01 0.00 16.40 3.08 2.15 0.01 6.20 0.29 0.01 0.00 16.60 3.10 2.16 0.01 6.40 0.30 0.01 0.00 16.80 3.11 2.18 0.01 6.60 0.32 0.01 0.00 17.00 3.13 2.19 0.01 6.80 0.33 0.02 0.00 17.20 3.14 2.20 0.01 7.00 0.34 0.02 0.00 17.40 3.16 2.22 0.01 7.20 0.36 0.02 0.00 17.60 3.17 2.23 0.01 7.40 0.37 0.03 0.00 17.80 3.18 2.24 0.01 7.60 0.39 0.03 0.00 18.00 3.20 2.25 0.01 7.80 0.40 0.03 0.00 18.20 3.21 2.27 0.01 8.00 0.42 0.04 0.00 18.40 3.22 2.28 0.01 8.20 0.43 0.04 0.00 18.60 3.23 2.29 0.01 8.40 0.45 0.05 0.00 18.80 3.24 2.30 0.01 8.60 0.47 0.06 0.00 19.00 3.25 2.31 0.01 8.80 0.49 0.07 0.00 19.20 3.26 2.32 0.01 9.00 0.51 0.07 0.00 19.40 3.27 2.33 0.00 9.20 0.53 0.08 0.00 19.60 3.28 2.34 0.00 9.40 0.55 0.09 0.00 19.80 3,29 2.35 0.00 9.60 0.58 0.11 0.01 20.00 3.30 2.36 0.00 9.80 0.60 0.12 0.01 10.00 0.63 0.13 0.01 10.20 0.66 0.15 0.01 Storm Calcs-update 2-12-2020 Type l/ 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 55 Summary for Pond 12P: Bioretention 1 Ponding Inflow Area = 1.340 ac, 23.88% Impervious, Inflow Depth > 1.48" for 2 YR event Inflow = 4.02 cfs @ 11.96 hrs, Volume= 0.165 af Outflow = 3.86 cfs @ 11.98 hrs, Volume= 0.160 af, Atten= 4%, Lag= 1.1 min Primary = 3.74 cfs @ 11.98 hrs, Volume= 0.081 af Secondary= 0.12 cfs @ 11.98 hrs, Volume= 0.080 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 401.22'@ 11.98 hrs Surf.Area= 1,312 sf Storage= 1,147 cf Plug-Flow detention time=44.1 min calculated for 0.160 of(97% of inflow) Center-of-Mass det. time= 33.0 min ( 823.8 - 790.8 ) Volume Invert Avail.Storage Storage Description #1 400.17' 2,580 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 400.17 870 0 0 402.17 1,710 2,580 2,580 Device Routing Invert Outlet Devices #1 Secondary 400.17' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 1.00' #2 Primary 400.90' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=3.73 cfs © 11.98 hrs HW=401.22' (Free Discharge) L2=Orifice/Grate (Weir Controls 3.73 cfs @ 1.85 fps) Secondary OutFlow Max=0.12 cfs @ 11.98 hrs HW=401.22' (Free Discharge) L1=Exfiltration ( Controls 0.12 cfs) Storm Calcs-update 2-12-2020 Type 11 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 56 Pond 12P: Bioretention 1 Ponding Hydrograph _. Inflow I4.02ch I Outflow ❑Primary Inflow Area=1 .340 ac 3.9Bcis Secondary 4 Peak EIev=401 .22' I3.74c15/ Storage=1 ,147 cf 3 li 2 • A • AIL!%//////Aware 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 12P: Bioretention 1 Ponding Stage-Discharge Total 61 Primary ■Secondary 402-•• w - c - t 401 italbelloh 0 2 4 6 8 10 12 14 16 Discharge (cis) Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 57 Pond 12P: Bioretention 1 Ponding Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,700 0 Surface ■Storage 402- c 0 y 401 w 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 58 Hydrograph for Pond 12P: Bioretention 1 Ponding Time Inflow Storage Elevation Outflow Primary Secondary (hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0 400.17 0.00 0.00 0.00 0.50 0.00 0 400.17 0.00 0.00 0.00 1.00 0.00 0 400.17 0.00 0.00 0.00 1.50 0.00 0 400.17 0.00 0.00 0.00 2.00 0.00 0 400.17 0.00 0.00 0.00 2.50 0.00 0 400.17 0.00 0.00 0.00 3.00 0.00 0 400.17 0.00 0.00 0.00 3.50 0.00 0 400.17 0.00 0.00 0.00 4.00 0.00 0 400.17 0.00 0.00 0.00 4.50 0.00 0 400.17 0.00 0.00 0.00 5.00 0.00 0 400.17 0.00 0.00 0.00 5.50 0.00 0 400.17 0.00 0.00 0.00 6.00 0.00 0 400.17 0.00 0.00 0.00 6.50 0.00 0 400.17 0.00 0.00 0.00 7.00 0.00 0 400.17 0.00 0.00 0.00 7.50 0.00 0 400.17 0.00 0.00 0.00 8.00 0.00 0 400.17 0.00 0.00 0.00 8.50 0.00 0 400.17 0.00 0.00 0.00 9.00 0.00 0 400.17 0.00 0.00 0.00 9.50 0.01 1 400.17 0.01 0.00 0.01 10.00 0.02 3 400.17 0.01 0.00 0.01 10.50 0.03 7 400.18 0.03 0.00 0.03 11.00 0.06 13 400.18 0.06 0.00 0.06 11.50 0.15 57 400.23 0.08 0.00 0.08 12.00 3.49 1,138 401.21 3.75 3.63 0.12 12.50 0.34 811 400.95 0.37 0.26 0.11 13.00 0.22 784 400.93 0.23 0.12 0.11 13.50 0.17 771 400.92 0.17 0.06 0.11 14.00 0.13 761 400.91 0.14 0.03 0.11 14.50 0.12 754 400.91 0.12 0.01 0.11 15.00 0.11 748 400.90 0.11 0.00 0.11 15.50 0.10 733 400.89 0.11 0.00 0.11 16.00 0.08 699 400.86 0.11 0.00 0.11 16.50 0.08 651 400.82 0.11 0.00 0.11 17.00 0.07 599 400.77 0.10 0.00 0.10 17.50 0.07 543 400.72 0.10 0.00 0.10 18.00 0.07 483 400.67 0.10 0.00 0.10 18.50 0.06 419 400.61 0.10 0.00 0.10 19.00 0.06 352 400.54 0.10 0.00 0.10 19.50 0.05 282 400.47 0.09 0.00 0.09 20.00 0.05 209 400.40 0.09 0.00 0.09 Storm Calcs-update 2-12-2020 Type 11 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 59 Stage-Discharge for Pond 12P: Bioretention 1 Ponding Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary (feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs) 400.17 0.00 0.00 0.00 401.21 3.67 3.55 0.12 400.19 0.08 0.00 0.08 401.23 4.02 3.89 0.12 400.21 0.08 0.00 0.08 401.25 4.38 4.25 0.12 400.23 0.08 0.00 0.08 401.27 4.75 4.62 0.12 400.25 0.08 0.00 0.08 401.29 5.13 5.00 0.12 400.27 0.08 0.00 0.08 401.31 5.52 5.39 0.13 400.29 0.09 0.00 0.09 401.33 5.92 5.79 0.13 400.31 0.09 0.00 0.09 401.35 6.33 6.20 0.13 400.33 0.09 0.00 0.09 401.37 6.75 6.62 0.13 400.35 0.09 0.00 0.09 401.39 7.18 7.05 0.13 400.37 0.09 0.00 0.09 401.41 7.61 7.48 0.13 400.39 0.09 0.00 0.09 401.43 8.06 7.93 0.13 400.41 0.09 0.00 0.09 401.45 8.51 8.38 0.13 400.43 0.09 0.00 0.09 401.47 8.97 8.84 0.13 400.45 0.09 0.00 0.09 401.49 9.44 9.31 0.13 400.47 0.09 0.00 0.09 401.51 9.92 9.79 0.13 400.49 0.09 0.00 0.09 401.53 10.41 10.27 0.13 400.51 0.09 0.00 0.09 401.55 10.90 10.77 0.13 400.53 0.09 0.00 0.09 401.57 11.40 11.27 0.14 400.55 0.10 0.00 0.10 401.59 11.91 11.78 0.14 400.57 0.10 0.00 0.10 401.61 12.43 12.29 0.14 400.59 0.10 0.00 0.10 401.63 12.95 12.81 0.14 400.61 0.10 0.00 0.10 401.65 13.24 13.10 0.14 400.63 0.10 0.00 0.10 401.67 13.41 13.27 0.14 400.65 0.10 0.00 0.10 401.69 13.58 13.44 0.14 400.67 0.10 0.00 0.10 401.71 13.75 13.61 0.14 400.69 0.10 0.00 0.10 401.73 13.92 13.78 0.14 400.71 0.10 0.00 0.10 401.75 14.09 13.95 0.14 400.73 0.10 0.00 0.10 401.77 14.25 14.11 0.14 400.75 0.10 0.00 0.10 401.79 14.41 14.27 0.14 400.77 0.10 0.00 0.10 401.81 14.57 14.43 0.14 400.79 0.10 0.00 0.10 401.83 14.73 14.59 0.15 400.81 0.11 0.00 0.11 401.85 14.89 14.74 0.15 400.83 0.11 0.00 0.11 401.87 15.05 14.90 0.15 400.85 0.11 0.00 0.11 401.89 15.20 15.05 0.15 400.87 0.11 0.00 0.11 401.91 15.35 15.20 0.15 400.89 0.11 0.00 0.11 401.93 15.50 15.35 0.15 400.91 0.13 0.02 0.11 401.95 15.65 15.50 0.15 400.93 0.22 0.11 0.11 401.97 15.80 15.65 0.15 400.95 0.34 0.23 0.11 401.99 15.94 15.79 0.15 400.97 0.49 0.38 0.11 402.01 16.09 15.94 0.15 400.99 0.67 0.55 0.11 402.03 16.23 16.08 0.15 401.01 0.86 0.75 0.11 402.05 16.38 16.22 0.15 401.03 1.08 0.96 0.11 402.07 16.52 16.36 0.16 401.05 1.31 1.19 0.11 402.09 16.66 16.50 0.16 401.07 1.56 1.44 0.12 402.11 16.80 16.64 0.16 401.09 1.82 1.70 0.12 402.13 16.93 16.78 0.16 401.11 2.09 1.98 0.12 402.15 17.07 16.91 0.16 401.13 2.38 2.27 0.12 402.17 17.21 17.05 0.16 401.15 2.69 2.57 0.12 401.17 3.00 2.88 0.12 401.19 3.33 3.21 0.12 Storm Calcs-update 2-12-2020 Type 11 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 60 Stage-Area-Storage for Pond 12P: Bioretention 1 Ponding Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 400.17 870 0 401.21 1;307 1,132 400.19 878 17 401.23 1..315 1,158 400.21 887 35 401.25 1,324 1,185 400.23 895 53 401.27 1,332 1,211 400.25 904 71 401.29 1,340 1,238 400.27 912 89 401.31 1,349 1,265 400.29 920 107 401.33 1,357 1,292 400.31 929 126 401.35 1,366 1,319 400.33 937 145 401.37 1,374 1,346 400.35 946 163 401.39 1,382 1,374 400.37 954 182 401.41 1,391 1,402 400.39 962 202 401.43 1,399 1,430 400.41 971 221 401.45 1,408 1,458 400.43 979 240 401.47 1,416 1,486 400.45 988 260 401.49 1,424 1,514 400.47 996 280 401.51 1,433 1,543 400.49 1,004 300 401.53 1,441 1,572 400.51 1,013 320 401.55 1,450 1,601 400.53 1,021 340 401.57 1,458 1,630 400.55 1,030 361 401.59 1,466 1,659 400.57 1,038 382 401.61 1,475 1,688 400.59 1,046 402 401.63 1,483 1,718 400.61 1,055 423 401.65 1;492 1,748 400.63 1,063 445 401.67 1,500 1,778 400.65 1,072 466 401.69 1,508 1,808 400.67 1,080 488 401.71 1,517 1,838 400.69 1,088 509 401.73 1,525 1,868 400.71 1,097 531 401.75 1,534 1,899 400.73 1,105 553 401.77 1,542 1,930 400.75 1,114 575 401.79 1,550 1,961 400.77 1,122 598 401.81 1,559 1,992 400.79 1,130 620 401.83 1,567 2,023 400.81 1,139 643 401.85 1,576 2,054 400.83 1,147 666 401.87 1,584 2,086 400.85 1,156 689 401.89 1,592 2,118 400.87 1,164 712 401.91 1,601 2,150 400.89 1,172 735 401.93 1;609 2,182 400.91 1,181 759 401.95 1,618 2,214 400.93 1,189 782 401.97 1,626 2,246 400.95 1,198 806 401.99 1,634 2,279 400.97 1,206 830 402.01 1,643 2,312 400.99 1,214 855 402.03 1,651 2,345 401.01 1,223 879 402.05 1,660 2,378 401.03 1,231 904 402.07 1,668 2,411 401.05 1,240 928 402.09 1,676 2,445 401.07 1,248 953 402.11 1.685 2,478 401.09 1,256 978 402.13 1.693 2,512 401.11 1,265 1,003 402.15 1,702 2,546 401.13 1,273 1,029 402.17 1,710 2,580 401.15 1,282 1,054 401.17 1,290 1,080 401.19 1,298 1,106 Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 61 Summary for Pond 13P: Bioretention 1 Media [44] Hint: Outlet device#1 is below defined storage Inflow = 0.12 cfs @ 11.98 hrs, Volume= 0.080 af Outflow = 0.12 cfs @ 11.99 hrs, Volume= 0.080 af, Atten= 0%, Lag= 0.6 min Primary = 0.12 cfs @ 11.99 hrs, Volume= 0.080 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 396.18'@ 11.99 hrs Surf.Area= 870 sf Storage= 4 cf Plug-Flow detention time=0.6 min calculated for 0.080 af(100% of inflow) Center-of-Mass det. time=0.3 min ( 915.5 -915.2 ) Volume Invert Avail.Storage Storage Description #1 396.17' 1,131 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 396.17 870 0.0 0 0 398.17 870 40.0 696 696 400.17 870 25.0 435 1,131 Device Routing Invert Outlet Devices #1 Primary 395.24' 4.0"Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=0.37 cfs @ 11.99 hrs HW=396.18' (Free Discharge) L1=Orifice/Grate (Orifice Controls 0.37 cfs @ 4.24 fps) Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 62 Pond 13P: Bioretention 1 Media Hydrograph / •Inflow 0.13- I o.iz ofs ■Primary' 0.14 Peak EIev=396.18' '°_12"s 0.117 Storage=4 cf 0.1- 0.09- a 0.08 u " 0.07- 3 ii 0.06- 0.05- 0.04- 0.03- 0.02- 0.01 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 13P: Bioretention 1 Media Stage-Discharge 400 / ■Primary` 399 0 C c 0 398- w 397 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 0.8 0.85 0.9 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 63 Pond 13P: Bioretention 1 Media Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 50 100 150 200 250 300 350 400 450 500 550 800 850 700 750 800 850 In Surfaces ■Storage 400- 0 399- 0 11 398- W j 0 397 _1011111.11 0 100 200 300 400 500 600 700 800 900 1,000 1,100 Storage(cubic-feet) 60'0 8L'96£ E 60'0 00'0Z 60'0 81'96£ £ 60'0 09'6L 0 L'0 8 L'96E b 0 L'0 00'61. 01.'0 8 L'96£ V 0 L'0 09'8l 01'0 8 L'96£ b 0 L'0 00'9 L 0L'0 8L'96£ P 0l'0 0911. 01.'0 8 L'96£ 17 0 L'0 001 l L L'0 8 L'96£ b L L'0 09'91. 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Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 65 Stage-Discharge for Pond 13P: Bioretention 1 Media Elevation Primary Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) (feet) (cfs) 396.17 0.00 397.21 0.56 398.25 0.71 399.29 0.83 396.19 0.37 397.23 0.57 398.27 0.71 399.31 0.83 396.21 0.38 397.25 0.57 398.29 0.71 399.33 0.83 396.23 0.38 397.27 0.57 398.31 0.72 399.35 0.83 396.25 0.39 397.29 0.58 398.33 0.72 399.37 0.84 396.27 0.39 397.31 0.58 398.35 0.72 399.39 0.84 396.29 0.39 397.33 0.58 398.37 0.72 399.41 0.84 396.31 0.40 397.35 0.59 398.39 0.73 399.43 0.84 396.33 0.40 397.37 0.59 398.41 0.73 399.45 0.84 396.35 0.41 397.39 0.59 398.43 0.73 399.47 0.85 396.37 0.41 397.41 0.59 398.45 0.73 399.49 0.85 396.39 0.42 397.43 0.60 398.47 0.74 399.51 0.85 396.41 0.42 397.45 0.60 398.49 0.74 399.53 0.85 396.43 0.43 397.47 0.60 398.51 0.74 399.55 0.86 396.45 0.43 397.49 0.61 398.53 0.74 399.57 0.86 396.47 0.43 397.51 0.61 398.55 0.74 399.59 0.86 396.49 0.44 397.53 0.61 398.57 0.75 399.61 0.86 396.51 0.44 397.55 0.62 398.59 0.75 399.63 0.86 396.53 0.45 397.57 0.62 398.61 0.75 399.65 0.87 396.55 0.45 397.59 0.62 398.63 0.75 399.67 0.87 396.57 0.45 397.61 0.62 398.65 0.76 399.69 0.87 396.59 0.46 397.63 0.63 398.67 0.76 399.71 0.87 396.61 0.46 397.65 0.63 398.69 0.76 399.73 0.87 396.63 0.46 397.67 0.63 398.71 0.76 399.75 0.88 396.65 0.47 397.69 0.63 398.73 0.77 399.77 0.88 396.67 0.47 397.71 0.64 398.75 0.77 399.79 0.88 396.69 0.48 397.73 0.64 398.77 0.77 399.81 0.88 396.71 0.48 397.75 0.64 398.79 0.77 399.83 0.88 396.73 0.48 397.77 0.65 398.81 0.78 399.85 0.89 396.75 0.49 397.79 0.65 398.83 0.78 399.87 0.89 396.77 0.49 397.81 0.65 398.85 0.78 399.89 0.89 396.79 0.49 397.83 0.65 398.87 0.78 399.91 0.89 396.81 0.50 397.85 0.66 398.89 0.78 399.93 0.89 396.83 0.50 397.87 0.66 398.91 0.79 399.95 0.90 396.85 0.50 397.89 0.66 398.93 0.79 399.97 0.90 396.87 0.51 397.91 0.66 398.95 0.79 399.99 0.90 396.89 0.51 397.93 0.67 398.97 0.79 400.01 0.90 396.91 0.52 397.95 0.67 398.99 0.80 400.03 0.90 396.93 0.52 397.97 0.67 399.01 0.80 400.05 0.91 396.95 0.52 397.99 0.68 399.03 0.80 400.07 0.91 396.97 0.53 398.01 0.68 399.05 0.80 400.09 0.91 396.99 0.53 398.03 0.68 399.07 0.80 400.11 0.91 397.01 0.53 398.05 0.68 399.09 0.81 400.13 0.91 397.03 0.54 398.07 0.69 399.11 0.81 400.15 0.92 397.05 0.54 398.09 0.69 399.13 0.81 400.17 0.92 397.07 0.54 398.11 0.69 399.15 0.81 397.09 0.55 398.13 0.69 399.17 0.82 397.11 0.55 398.15 0.70 399.19 0.82 397.13 0.55 398.17 0.70 399.21 0.82 397.15 0.55 398.19 0.70 399.23 0.82 397.17 0.56 398.21 0.70 399.25 0.82 397.19 0.56 398.23 0.71 399.27 0.83 Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 66 Stage-Area-Storage for Pond 13P: Bioretention 1 Media Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 396.17 870 0 398.77 870 827 396.22 870 17 398.82 870 837 396.27 870 35 398.87 870 848 396.32 870 52 398.92 870 859 396.37 870 70 398.97 870 870 396.42 870 87 399.02 870 881 396.47 870 104 399.07 870 892 396.52 870 122 399.12 870 903 396.57 870 139 399.17 870 914 396.62 870 157 399.22 870 924 396.67 870 174 399.27 870 935 396.72 870 191 399.32 870 946 396.77 870 209 399.37 870 957 396.82 870 226 399.42 870 968 396.87 870 244 399.47 870 979 396.92 870 261 399.52 870 990 396.97 870 278 399.57 870 1,000 397.02 870 296 399.62 870 1,011 397.07 870 313 399.67 870 1,022 397.12 870 331 399.72 870 1,033 397.17 870 348 399.77 870 1,044 397.22 870 365 399.82 870 1,055 397.27 870 383 399.87 870 1,066 397.32 870 400 399.92 870 1,077 397.37 870 418 399.97 870 1,088 397.42 870 435 400.02 870 1,098 397.47 870 452 400.07 870 1,109 397.52 870 470 400.12 870 1,120 397.57 870 487 400.17 870 1,131 397.62 870 505 397.67 870 522 397.72 870 539 397.77 870 557 397.82 870 574 397.87 870 592 397.92 870 609 397.97 870 626 398.02 870 644 398.07 870 661 398.12 870 679 398.17 870 696 398.22 870 707 398.27 870 718 398.32 870 729 398.37 870 739 398.42 870 750 398.47 870 761 398.52 870 772 398.57 870 783 398.62 870 794 398.67 870 805 398.72 870 816 Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 67 Summary for Pond 15P: Bioretention 2 Ponding Inflow Area = 0.880 ac, 76.14% Impervious, Inflow Depth > 2.45" for 2 YR event Inflow = 3.99 cfs @ 11.96 hrs, Volume= 0.179 of Outflow = 3.52 cfs @ 11.99 hrs, Volume= 0.179 af, Atten= 12%, Lag= 2.1 min Primary = 3.31 cfs @ 11.99 hrs, Volume= 0.068 af Secondary= 0.20 cfs @ 11.99 hrs, Volume= 0.111 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 399.86'@ 11.99 hrs Surf.Area= 2,179 sf Storage= 1,621 cf Plug-Flow detention time=26.4 min calculated for 0.179 af(100% of inflow) Center-of-Mass det. time=26.0 min ( 781.7 - 755.7 ) Volume Invert Avail.Storage Storage Description #1 399.00' 4,550 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 399.00 1,596 0 0 401.00 2,954 4,550 4,550 Device Routing Invert Outlet Devices #1 Secondary 399.00' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 1.00' #2 Primary 399.50' 18.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=3.31 cfs @ 11.99 hrs HW=399.86' (Free Discharge) L2=Orifice/Grate (Weir Controls 3.31 cfs @ 1.96 fps) Secondary OutFlow Max=0.20 cfs @ 11.99 hrs HW=399.86' (Free Discharge) T-1=Exfiltration ( Controls 0.20 cfs) Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 68 Pond 15P: Bioretention 2 Ponding Hydrograph Inflow 3.98ch I Outflow Inflow Area=0.880 ac o Primary Secondary 4 Peak Elev=399.86' 3.52 cfs Storage=1,621 cf I331 cfs*13 4/ 3 1 u. 2 1- Affigre O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 15P: Bioretention 2 Ponding Stage-Discharge ❑Total 401 ■Primary ■Secondary 0 400 Orifice/Grate Exfiltration 399 O 1 2 3 4 5 6 7 8 9 10 Discharge (cfs) Storm Calcs-update 2-12-2020 Type 1124-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 69 Pond 15P: Bioretention 2 Ponding Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 0 Surface' I Storage 401 -/ I � I I I i i J I I p 400 m 111.111111111111111.1 � I 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 70 Hydrograph for Pond 15P: Bioretention 2 Ponding Time Inflow Storage Elevation Outflow Primary Secondary (hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0 399.00 0.00 0.00 0.00 0.50 0.00 0 399.00 0.00 0.00 0.00 1.00 0.00 0 399.00 0.00 0.00 0.00 1.50 0.00 0 399.00 0.00 0.00 0.00 2.00 0.00 0 399.00 0.00 0.00 0.00 2.50 0.00 0 399.00 0.00 0.00 0.00 3.00 0.00 0 399.00 0.00 0.00 0.00 3.50 0.00 0 399.00 0.00 0.00 0.00 4.00 0.00 0 399.00 0.00 0.00 0.00 4.50 0.00 0 399.00 0.00 0.00 0.00 5.00 0.00 1 399.00 0.00 0.00 0.00 5.50 0.01 1 399.00 0.01 0.00 0.01 6.00 0.01 2 399.00 0.01 0.00 0.01 6.50 0.01 3 399.00 0.01 0.00 0.01 7.00 0.02 4 399.00 0.02 0.00 0.02 7.50 0.02 5 399.00 0.02 0.00 0.02 8.00 0.03 5 399.00 0.03 0.00 0.03 8.50 0.03 7 399.00 0.03 0.00 0.03 9.00 0.05 9 399.01 0.04 0.00 0.04 9.50 0.05 11 399.01 0.05 0.00 0.05 10.00 0.07 14 399.01 0.06 0.00 0.06 10.50 0.09 19 399.01 0.09 0.00 0.09 11.00 0.14 29 399.02 0.13 0.00 0.13 11.50 0.25 104 399.06 0.15 0.00 0.15 12.00 3.34 1,619 399.86 3.50 3.30 0.20 12.50 0.30 984 399.55 0.37 0.19 0.18 13.00 0.19 913 399.52 0.21 0.03 0.18 13.50 0.14 863 399.49 0.18 0.00 0.18 14.00 0.11 771 399.44 0.18 0.00 0.18 14.50 0.10 645 399.37 0.17 0.00 0.17 15.00 0.09 509 399.30 0.17 0.00 0.17 15.50 0.08 364 399.22 0.16 0.00 0.16 16.00 0.07 211 399.13 0.16 0.00 0.16 16.50 0.06 54 399.03 0.15 0.00 0.15 17.00 0.06 13 399.01 0.06 0.00 0.06 17.50 0.06 12 399.01 0.06 0.00 0.06 18.00 0.05 12 399.01 0.05 0.00 0.05 18.50 0.05 11 399.01 0.05 0.00 0.05 19.00 0.05 10 399.01 0.05 0.00 0.05 19.50 0.04 9 399.01 0.04 0.00 0.04 20.00 0.04 8 399.01 0.04 0.00 0.04 Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 71 Stage-Discharge for Pond 15P: Bioretention 2 Ponding Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary (feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs) 399.00 0.00 0.00 0.00 400.04 6.33 6.11 0.21 399.02 0.15 0.00 0.15 400.06 6.58 6.37 0.21 399.04 0.15 0.00 0.15 400.08 6.70 6.48 0.22 399.06 0.15 0.00 0.15 400.10 6.81 6.59 0.22 399.08 0.15 0.00 0.15 400.12 6.92 6.70 0.22 399.10 0.15 0.00 0.15 400.14 7.03 6.81 0.22 399.12 0.16 0.00 0.16 400.16 7.13 6.91 0.22 399.14 0.16 0.00 0.16 400.18 7.24 7.02 0.22 399.16 0.16 0.00 0.16 400.20 7.34 7.12 0.22 399.18 0.16 0.00 0.16 400.22 7.44 7.22 0.23 399.20 0.16 0.00 0.16 400.24 7.55 7.32 0.23 399.22 0.16 0.00 0.16 400.26 7.65 7.42 0.23 399.24 0.16 0.00 0.16 400.28 7.74 7.51 0.23 399.26 0.16 0.00 0.16 400.30 7.84 7.61 0.23 399.28 0.17 0.00 0.17 400.32 7.94 7.71 0.23 399.30 0.17 0.00 0.17 400.34 8.03 7.80 0.23 399.32 0.17 0.00 0.17 400.36 8.12 7.89 0.23 399.34 0.17 0.00 0.17 400.38 8.22 7.98 0.24 399.36 0.17 0.00 0.17 400.40 8.31 8.07 0.24 399.38 0.17 0.00 0.17 400.42 8.40 8.16 0.24 399.40 0.17 0.00 0.17 400.44 8.49 8.25 0.24 399.42 0.17 0.00 0.17 400.46 8.58 8.34 0.24 399.44 0.18 0.00 0.18 400.48 8.66 8.42 0.24 399.46 0.18 0.00 0.18 400.50 8.75 8.51 0.24 399.48 0.18 0.00 0.18 400.52 8.84 8.59 0.24 399.50 0.18 0.00 0.18 400.54 8.92 8.68 0.25 399.52 0.22 0.04 0.18 400.56 9.01 8.76 0.25 399.54 0.31 0.12 0.18 400.58 9.09 8.84 0.25 399.56 0.41 0.23 0.18 400.60 9.17 8.92 0.25 399.58 0.53 0.35 0.18 400.62 9.26 9.00 0.25 399.60 0.67 0.49 0.19 400.64 9.34 9.08 0.25 399.62 0.83 0.64 0.19 400.66 9.42 9.16 0.25 399.64 1.00 0.81 0.19 400.68 9.50 9.24 0.25 399.66 1.18 0.99 0.19 400.70 9.58 9.32 0.26 399.68 1.37 1.18 0.19 400.72 9.66 9.40 0.26 399.70 1.57 1.38 0.19 400.74 9.73 9.47 0.26 399.72 1.78 1.59 0.19 400.76 9.81 9.55 0.26 399.74 2.01 1.81 0.19 400.78 9.89 9.63 0.26 399.76 2.24 2.04 0.20 400.80 9.96 9.70 0.26 399.78 2.48 2.28 0.20 400.82 10.04 9.78 0.26 399.80 2.73 2.53 0.20 400.84 10.11 9.85 0.26 399.82 2.99 2.79 0.20 400.86 10.19 9.92 0.27 399.84 3.26 3.05 0.20 400.88 10.26 10.00 0.27 399.86 3.53 3.33 0.20 400.90 10.34 10.07 0.27 399.88 3.81 3.61 0.20 400.92 10.41 10.14 0.27 399.90 4.10 3.90 0.20 400.94 10.48 10.21 0.27 399.92 4.40 4.19 0.21 400.96 10.55 10.28 0.27 399.94 4.70 4.50 0.21 400.98 10.62 10.35 0.27 399.96 5.02 4.81 0.21 401.00 10.70 10.42 0.27 399.98 5.33 5.12 0.21 400.00 5.66 5.45 0.21 400.02 5.99 5.78 0.21 Storm Calcs-update 2-12-2020 Type 1124-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 72 Stage-Area-Storage for Pond 15P: Bioretention 2 Ponding Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 399.00 1,596 0 400.04 2,302 2,027 399.02 1,610 32 400.06 2,316 2,073 399.04 1,623 64 400.08 2,329 2,120 399.06 1,637 97 400.10 2,343 2,166 399.08 1,650 130 400.12 2,356 2,213 399.10 1,664 163 400.14 2,370 2,261 399.12 1,677 196 400.16 2,384 2,308 399.14 1,691 230 400.18 2,397 2,356 399.16 1,705 264 400.20 2,411 2,404 399.18 1,718 298 400.22 2,424 2,452 399.20 1,732 333 400.24 2,438 2,501 399.22 1,745 368 400.26 2,452 2,550 399.24 1,759 403 400.28 2,465 2,599 399.26 1,773 438 400.30 2,479 2,649 399.28 1,786 473 400.32 2,492 2,698 399.30 1,800 509 400.34 2,506 2,748 399.32 1,813 545 400.36 2,519 2,798 399.34 1,827 582 400.38 2,533 2,849 399.36 1,840 619 400.40 2,547 2,900 399.38 1,854 656 400.42 2,560 2,951 399.40 1,868 693 400.44 2,574 3,002 399.42 1,881 730 400.46 2,587 3,054 399.44 1,895 768 400.48 2,601 3,106 399.46 1,908 806 400.50 2,615 3,158 399.48 1,922 844 400.52 2,628 3,210 399.50 1,936 883 400.54 2,642 3,263 399.52 1,949 922 400.56 2,655 3,316 399.54 1,963 961 400.58 2,669 3,369 399.56 1,976 1,000 400.60 2,682 3,423 399.58 1,990 1,040 400.62 2,696 3,477 399.60 2,003 1,080 400.64 2,710 3,531 399.62 2,017 1,120 400.66 2,723 3,585 399.64 2,031 1,160 400.68 2,737 3,639 399.66 2,044 1,201 400.70 2,750 3,694 399.68 2,058 1,242 400.72 2,764 3,749 399.70 2,071 1,284 400.74 2,777 3,805 399.72 2,085 1,325 400.76 2,791 3,861 399.74 2,098 1,367 400.78 2,805 3,917 399.76 2,112 1,409 400.80 2,818 3,973 399.78 2,126 1,451 400.82 2,832 4,029 399.80 2,139 1,494 400.84 2,845 4,086 399.82 2,153 1,537 400.86 2,859 4,143 399.84 2,166 1,580 400.88 2,873 4,200 399.86 2,180 1,624 400.90 2,886 4,258 399.88 2,194 1,667 400.92 2,900 4,316 399.90 2,207 1,711 400.94 2,913 4,374 399.92 2,221 1,756 400.96 2,927 4,432 399.94 2,234 1,800 400.98 2,940 4,491 399.96 2,248 1,845 401.00 2,954 4,550 399.98 2,261 1,890 400.00 2,275 1,936 400.02 2,289 1,981 Storm Calcs-update 2-12-2020 Type 11 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 73 Summary for Pond 16P: Bioretention 2 Media Inflow = 0.20 cfs @ 11.99 hrs, Volume= 0.111 af Outflow = 0.20 cfs @ 12.07 hrs, Volume= 0.090 af, Atten= 3%, Lag= 4.4 min Primary = 0.20 cfs @ 12.07 hrs, Volume= 0.090 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 395.41' @ 12.07 hrs Surf.Area= 1,500 sf Storage= 998 cf Plug-Flow detention time= 119.6 min calculated for 0.090 af(81% of inflow) Center-of-Mass det. time=62.8 min ( 878.8 - 816.0 ) Volume Invert Avail.Storage Storage Description #1 393.75' 2,419 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 393.75 1,500 0.0 0 0 395.75 1,500 40.0 1,200 1,200 399.00 1,500 25.0 1,219 2,419 Device Routing Invert Outlet Devices #1 Primary 395.24' 4.0"Vert. Orifice/Grate X 3.00 C= 0.600 Primary OutFlow Max=0.19 cfs @ 12.07 hrs HW=395.41' (Free Discharge) L1=Orifice/Grate (Orifice Controls 0.19 cfs @ 1.42 fps) Pond 16P: Bioretention 2 Media Hydrograph - I Inflow II 0.22 .. . . ..... . . I0.20crs ❑Primary 021 Peak Elev=395.41 ' 0.20d, 0.2= 0.19' 0.18i Storage=998 cf 0.17' - - a1s r 0.15= - 0.143 - ---- - 0.13 0.12= • - 3 • - a 0.• . 0.09'Cr - 0.08� - -- - - 0.07- - 0.06 - - 0.05 - - 0.04- - - -- - 0.03 - 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type Il 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 74 Pond 16P: Bioretention 2 Media Stage-Discharge 399J •Pnmary 398 Z 397 c 0 II d 396 w 395 394 — 0 1 2 Discharge (cfs) Pond 16P: Bioretention 2 Media Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 ❑Surface / ■Storage 399- 398 y 397 0 c 0 396 0 395 394- 011111111111111111111111 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 75 Hydrograph for Pond 16P: Bioretention 2 Media Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 393.75 0.00 0.50 0.00 0 393.75 0.00 1.00 0.00 0 393.75 0.00 1.50 0.00 0 393.75 0.00 2.00 0.00 0 393.75 0.00 2.50 0.00 0 393.75 0.00 3.00 0.00 0 393.75 0.00 3.50 0.00 0 393.75 0.00 4.00 0.00 0 393.75 0.00 4.50 0.00 0 393.75 0.00 5.00 0.00 5 393.76 0.00 5.50 0.01 15 393.77 0.00 6.00 0.01 30 393.80 0.00 6.50 0.01 52 393.84 0.00 7.00 0.02 80 393.88 0.00 7.50 0.02 114 393.94 0.00 8.00 0.03 156 394.01 0.00 8.50 0.03 208 394.10 0.00 9.00 0.04 277 394.21 0.00 9.50 0.05 363 394.36 0.00 10.00 0.06 465 394.52 0.00 10.50 0.09 603 394.75 0.00 11.00 0.13 801 395.09 0.00 11.50 0.15 979 395.38 0.14 12.00 0.20 997 395.41 0.19 12.50 0.18 994 395.41 0.18 13.00 0.18 993 395.40 0.18 13.50 0.18 992 395.40 0.18 14.00 0.18 992 395.40 0.18 14.50 0.17 990 395.40 0.17 15.00 0.17 989 395.40 0.17 15.50 0.16 987 395.40 0.16 16.00 0.16 985 395.39 0.16 16.50 0.15 984 395.39 0.15 17.00 0.06 951 395.33 0.07 17.50 0.06 947 395.33 0.06 18.00 0.05 946 395.33 0.05 18.50 0.05 944 395.32 0.05 19.00 0.05 942 395.32 0.05 19.50 0.04 939 395.32 0.04 20.00 0.04 937 395.31 0.04 Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 76 Stage-Discharge for Pond 16P: Bioretention 2 Media Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) 393.75 0.00 395.83 0.82 397.91 1.99 393.79 0.00 395.87 0.86 397.95 2.01 393.83 0.00 395.91 0.89 397.99 2.03 393.87 0.00 395.95 0.93 398.03 2.04 393.91 0.00 395.99 0.96 398.07 2.06 393.95 0.00 396.03 1.00 398.11 2.07 393.99 0.00 396.07 1.03 398.15 2.09 394.03 0.00 396.11 1.06 398.19 2.10 394.07 0.00 396.15 1.09 398.23 2.12 394.11 0.00 396.19 1.12 398.27 2.13 394.15 0.00 396.23 1.14 398.31 2.15 394.19 0.00 396.27 1.17 398.35 2.16 394.23 0.00 396.31 1.20 398.39 2.18 394.27 0.00 396.35 1.22 398.43 2.19 394.31 0.00 396.39 1.25 398.47 2.21 394.35 0.00 396.43 1.28 398.51 2.22 394.39 0.00 396.47 1.30 398.55 2.23 394.43 0.00 396.51 1.32 398.59 2.25 394.47 0.00 396.55 1.35 398.63 2.26 394.51 0.00 396.59 1.37 398.67 2.28 394.55 0.00 396.63 1.39 398.71 2.29 394.59 0.00 396.67 1.42 398.75 2.30 394.63 0.00 396.71 1.44 398.79 2.32 394.67 0.00 396.75 1.46 398.83 2.33 394.71 0.00 396.79 1.48 398.87 2.35 394.75 0.00 396.83 1.50 398.91 2.36 394.79 0.00 396.87 1.52 398.95 2.37 394.83 0.00 396.91 1.55 398.99 2.39 394.87 0.00 396.95 1.57 394.91 0.00 396.99 1.59 394.95 0.00 397.03 1.61 394.99 0.00 397.07 1.63 395.03 0.00 397.11 1.65 395.07 0.00 397.15 1.66 395.11 0.00 397.19 1.68 395.15 0.00 397.23 1.70 395.19 0.00 397.27 1.72 395.23 0.00 397.31 1.74 395.27 0.01 397.35 1.76 395.31 0.04 397.39 1.78 395.35 0.09 397.43 1.79 395.39 0.15 397.47 1.81 395.43 0.23 397.51 1.83 395.47 0.31 397.55 1.85 395.51 0.40 397.59 1.86 395.55 0.48 397.63 1.88 395.59 0.54 397.67 1.90 395.63 0.60 397.71 1.91 395.67 0.65 397.75 1.93 395.71 0.69 397.79 1.95 395.75 0.74 397.83 1.96 395.79 0.78 397.87 1.98 Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 77 Stage-Area-Storage for Pond 16P: Bioretention 2 Media Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 393.75 1,500 0 398.95 1,500 2,400 393.85 1,500 60 393.95 1,500 120 394.05 1,500 180 394.15 1,500 240 394.25 1,500 300 394.35 1,500 360 394.45 1,500 420 394.55 1,500 480 394.65 1,500 540 394.75 1,500 600 394.85 1,500 660 394.95 1,500 720 395.05 1,500 780 395.15 1,500 840 395.25 1,500 900 395.35 1,500 960 395.45 1,500 1,020 395.55 1,500 1,080 395.65 1,500 1,140 395.75 1,500 1,200 395.85 1,500 1,238 395.95 1,500 1,275 396.05 1,500 1,313 396.15 1,500 1,350 396.25 1,500 1,388 396.35 1,500 1,425 396.45 1,500 1,462 396.55 1,500 1,500 396.65 1,500 1,537 396.75 1,500 1,575 396.85 1,500 1,613 396.95 1,500 1,650 397.05 1,500 1,688 397.15 1,500 1,725 397.25 1,500 1,763 397.35 1,500 1,800 397.45 1,500 1,837 397.55 1,500 1,875 397.65 1,500 1,912 397.75 1,500 1,950 397.85 1,500 1,988 397.95 1,500 2,025 398.05 1,500 2,063 398.15 1,500 2,100 398.25 1,500 2,138 398.35 1,500 2,175 398.45 1,500 2,212 398.55 1,500 2,250 398.65 1,500 2,287 398.75 1,500 2,325 398.85 1,500 2,363 Storm Calcs-update 2-12-2020 Type ll 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 78 Summary for Pond 18P: Modified SWM Facility [44] Hint: Outlet device#2 is below defined storage Inflow Area = 4.200 ac, 55.24% Impervious, Inflow Depth > 1.97" for 2 YR event Inflow = 11.64 cfs @ 12.00 hrs, Volume= 0.690 of Outflow = 5.25 cfs @ 12.22 hrs, Volume= 0.678 af, Atten= 55%, Lag= 12.9 min Primary = 5.25 cfs @ 12.22 hrs, Volume= 0.678 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs/3 Peak Elev= 392.79'@ 12.22 hrs Surf.Area= 3,708 sf Storage= 8,414 cf Plug-Flow detention time=31.9 min calculated for 0.678 af(98% of inflow) Center-of-Mass det. time=25.3 min ( 819.5 - 794.2 ) Volume Invert Avail.Storage Storage Description #1 390.05' 17,748 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 390.05 2,437 0 0 395.00 4,734 17,748 17,748 Device Routing Invert Outlet Devices #1 Primary 390.05' 24.0" Round Culvert L= 52.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 390.05'/389.75' S= 0.0058'/' Cc= 0.900 n= 0.011 Concrete pipe, straight& clean, Flow Area= 3.14 sf #2 Device 1 389.05' 7.0"W x 7.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 392.25' 24.0" W x 18.0" H Vert. Orifice/Grate C= 0.600 #4 Device 1 393.75' 24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=5.25 cfs @ 12.22 hrs HW=392.79' (Free Discharge) L1=Culvert (Passes 5.25 cfs of 18.33 cfs potential flow) -2=Orifice/Grate (Orifice Controls 2.71 cfs @ 7.97 fps) -3=OrificelGrate (Orifice Controls 2.54 cfs @ 2.36 fps) -4=Orifice/Grate ( Controls 0.00 cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 79 Pond 18P: Modified SWM Facility Hydrograph 13 _ Pi Inflow /- I 11.64 cfs' ❑Primary 12 --If#I-pw Area=4.20Q arc Peak Elev=392.794 Storage=8,414 cf I I I I I - 1 6 r 5.25.1 3.1 T 1 r Z 1 r l I r I I I I I 2. - I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 18P: Modified SWM Facility Stage-Discharge 395 / ❑Primary dirAdirrAllir 394 / � Orifice/Grate_Am,' w 393 c / ° Orifice/Grate w 392 391 Culvert 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 80 Pond 18P: Modified SWM Facility Stage-Area-Storage Surface/HorizontallWetted Area(sq-ft) 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 0 Surface ■Storage 395/ 394 y 393 c m I 1 i la 392 i , i 1 391 Custom Stage Data / 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 81 Hydrograph for Pond 18P: Modified SWM Facility Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 390.05 0.00 0.50 0.00 0 390.05 0.00 1.00 0.00 0 390.05 0.00 1.50 0.00 0 390.05 0.00 2.00 0.00 0 390.05 0.00 2.50 0.00 0 390.05 0.00 3.00 0.00 0 390.05 0.00 3.50 0.00 0 390.05 0.00 4.00 0.00 0 390.05 0.00 4.50 0.00 0 390.05 0.00 5.00 0.00 0 390.05 0.00 5.50 0.00 1 390.05 0.00 6.00 0.01 9 390.05 0.00 6.50 0.01 26 390.06 0.00 7.00 0.02 53 390.07 0.00 7.50 0.03 87 390.09 0.01 8.00 0.04 129 390.10 0.01 8.50 0.05 169 390.12 0.03 9.00 0.07 215 390.14 0.04 9.50 0.09 270 390.16 0.06 10.00 0.12 320 390.18 0.09 10.50 0.18 393 390.21 0.14 11.00 0.29 499 390.25 0.22 11.50 0.62 719 390.34 0.44 12.00 11.63 4,615 391.69 2.10 12.50 1.91 7,227 392.46 3.17 13.00 0.92 5,040 391.82 2.18 13.50 0.70 2.944 391.14 1.71 14.00 0.58 1,443 390.61 1.23 14.50 0.52 854 390.39 0.61 15.00 0.48 772 390.36 0.50 15.50 0.45 741 390.35 0.47 16.00 0.42 716 390.34 0.44 16.50 0.40 692 390.33 0.41 17.00 0.31 630 390.30 0.34 17.50 0.29 590 390.29 0.30 18.00 0.27 570 390.28 0.28 18.50 0.26 555 390.27 0.27 19.00 0.25 540 390.27 0.26 19.50 0.23 525 390.26 0.24 20.00 0.22 510 390.26 0.23 Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 82 Stage-Discharge for Pond 18P: Modified SWM Facility Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 390.05 0.00 392.65 4.27 390.10 0.01 392.70 4.61 390.15 0.05 392.75 4.96 390.20 0.12 392.80 5.34 390.25 0.21 392.85 5.73 390.30 0.33 392.90 6.13 390.35 0.48 392.95 6.55 390.40 0.65 393.00 6.98 390.45 0.83 393.05 7.43 390.50 1.04 393.10 7.89 390.55 1.16 393.15 8.37 390.60 1.22 393.20 8.85 390.65 1.27 393.25 9.35 390.70 1.32 393.30 9.86 390.75 1.37 393.35 10.38 390.80 1.42 393.40 10.92 390.85 1.47 393.45 11.46 390.90 1.51 393.50 12.02 390.95 1.55 393.55 12.58 391.00 1.60 393.60 13.16 391.05 1.64 393.65 13.74 391.10 1.68 393.70 14.34 391.15 1.72 393.75 14.95 391.20 1.76 393.80 15.78 391.25 1.79 393.85 16.81 391.30 1.83 393.90 17.97 391.35 1.87 393.95 19.23 391.40 1.90 394.00 20.59 391.45 1.94 394.05 22.02 391.50 1.97 394.10 23.54 391.55 2.01 394.15 25.13 391.60 2.04 394.20 26.78 391.65 2.07 394.25 27.06 391.70 2.10 394.30 27.27 391.75 2.14 394.35 27.48 391.80 2.17 394.40 27.69 391.85 2.20 394.45 27.89 391.90 2.23 394.50 28.10 391.95 2.26 394.55 28.30 392.00 2.29 394.60 28.50 392.05 2.32 394.65 28.70 392.10 2.35 394.70 28.90 392.15 2.37 394.75 29.10 392.20 2.40 394.80 29.29 392.25 2.43 394.85 29.49 392.30 2.53 394.90 29.68 392.35 2.69 394.95 29.87 392.40 2.88 395.00 30.06 392.45 3.11 392.50 3.37 392.55 3.65 392.60 3.95 Storm Calcs-update 2-12-2020 Type 11 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 83 Stage-Area-Storage for Pond 18P: Modified SWM Facility Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 390.05 2,437 0 392.65 3,644 7,905 390.10 2,460 122 392.70 3,667 8,087 390.15 2,483 246 392.75 3,690 8,271 390.20 2,507 371 392.80 3,713 8,456 390.25 2,530 497 392.85 3,736 8,643 390.30 2,553 624 392.90 3,760 8,830 390.35 2,576 752 392.95 3,783 9,019 390.40 2,599 881 393.00 3,806 9,208 390.45 2,623 1,012 393.05 3,829 9,399 390.50 2,646 1,144 393.10 3,852 9,591 390.55 2,669 1,277 393.15 3,876 9,784 390.60 2,692 1,411 393.20 3,899 9,979 390.65 2,715 1,546 393.25 3,922 10,174 390.70 2,739 1,682 393.30 3,945 10,371 390.75 2,762 1,820 393.35 3,968 10,569 390.80 2,785 1,958 393.40 3,992 10,768 390.85 2,808 2,098 393.45 4,015 10,968 390.90 2,831 2,239 393.50 4,038 11,169 390.95 2,855 2,381 393.55 4,061 11,372 391.00 2,878 2,525 393.60 4,084 11,575 391.05 2,901 2,669 393.65 4,108 11,780 391.10 2,924 2,815 393.70 4,131 11,986 391.15 2,947 2,961 393.75 4,154 12,193 391.20 2,971 3,109 393.80 4,177 12,402 391.25 2,994 3,259 393.85 4,200 12,611 391.30 3,017 3,409 393.90 4,224 12,822 391.35 3,040 3,560 393.95 4,247 13,033 391.40 3,063 3,713 394.00 4,270 13,246 391.45 3,087 3,867 394.05 4,293 13,460 391.50 3,110 4,021 394.10 4,316 13,676 391.55 3,133 4,178 394.15 4,340 13,892 391.60 3,156 4,335 394.20 4,363 14,110 391.65 3,179 4,493 394.25 4,386 14,328 391.70 3,203 4,653 394.30 4,409 14,548 391.75 3,226 4,813 394.35 4,432 14,769 391.80 3,249 4,975 394.40 4,456 14,991 391.85 3,272 5,138 394.45 4,479 15,215 391.90 3,295 5,303 394.50 4,502 15,439 391.95 3,319 5,468 394.55 4,525 15,665 392.00 3,342 5,634 394.60 4,548 15,892 392.05 3,365 5,802 394.65 4,572 16,120 392.10 3,388 5,971 394.70 4,595 16,349 392.15 3,411 6,141 394.75 4,618 16,579 392.20 3,435 6,312 394.80 4,641 16,811 392.25 3,458 6,484 394.85 4,664 17,043 392.30 3,481 6,658 394.90 4,688 17,277 392.35 3,504 6,832 394.95 4,711 17,512 392.40 3,527 7,008 395.00 4,734 17,748 392.45 3,551 7,185 392.50 3,574 7,363 392.55 3,597 7,543 392.60 3,620 7,723 Storm Calcs-update 2-12-2020 Type II 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 84 Summary for Link 20L: Post Analysis Point 1 Inflow Area = 4.300 ac, 55.58% Impervious, Inflow Depth > 1.95" for 2 YR event Inflow = 5.46 cfs @ 12.21 hrs, Volume= 0.698 af Primary = 5.46 cfs @ 12.21 hrs, Volume= 0.698 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Link 20L: Post Analysis Point 1 Hydrograph / ■Inflow 6 15.4 cfs ■Primary Inflow Area=4.300 ac 15.46` i 5 f1 4 / 0 3 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type 11 24-hr 2 YR Rainfall=3.47" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 85 Hydrograph for Link 20L: Post Analysis Point 1 Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 10.40 0.13 0.00 0.13 0.20 0.00 0.00 0.00 10.60 0.16 0.00 0.16 0.40 0.00 0.00 0.00 10.80 0.19 0.00 0.19 0.60 0.00 0.00 0.00 11.00 0.23 0.00 0.23 0.80 0.00 0.00 0.00 11.20 0.28 0.00 0.28 1.00 0.00 0.00 0.00 11.40 0.39 0.00 0.39 1.20 0.00 0.00 0.00 11.60 0.54 0.00 0.54 1.40 0.00 0.00 0.00 11.80 0.94 0.00 0.94 1.60 0.00 0.00 0.00 12.00 2.33 0.00 2.33 1.80 0.00 0.00 0.00 12.20 5.44 0.00 5.44 2.00 0.00 0.00 0.00 12.40 4.00 0.00 4.00 2.20 0.00 0.00 0.00 12.60 2.70 0.00 2.70 2.40 0.00 0.00 0.00 12.80 2.37 0.00 2.37 2.60 0.00 0.00 0.00 13.00 2.20 0.00 2.20 2.80 0.00 0.00 0.00 13.20 2.02 0.00 2.02 3.00 0.00 0.00 0.00 13.40 1.83 0.00 1.83 3.20 0.00 0.00 0.00 13.60 1.63 0.00 1.63 3.40 0.00 0.00 0.00 13.80 1.44 0.00 1.44 3.60 0.00 0.00 0.00 14.00 1.24 0.00 1.24 3.80 0.00 0.00 0.00 14.20 0.92 0.00 0.92 4.00 0.00 0.00 0.00 14.40 0.68 0.00 0.68 4.20 0.00 0.00 0.00 14.60 0.59 0.00 0.59 4.40 0.00 0.00 0.00 14.80 0.54 0.00 0.54 4.60 0.00 0.00 0.00 15.00 0.51 0.00 0.51 4.80 0.00 0.00 0.00 15.20 0.50 0.00 0.50 5.00 0.00 0.00 0.00 15.40 0.48 0.00 0.48 5.20 0.00 0.00 0.00 15.60 0.47 0.00 0.47 5.40 0.00 0.00 0.00 15.80 0.46 0.00 0.46 5.60 0.00 0.00 0.00 16.00 0.45 0.00 0.45 5.80 0.00 0.00 0.00 16.20 0.43 0.00 0.43 6.00 0.00 0.00 0.00 16.40 0.42 0.00 0.42 6.20 0.00 0.00 0.00 16.60 0.41 0.00 0.41 6.40 0.00 0.00 0.00 16.80 0.38 0.00 0.38 6.60 0.00 0.00 0.00 17.00 0.35 0.00 0.35 6.80 0.01 0.00 0.01 17.20 0.33 0.00 0.33 7.00 0.01 0.00 0.01 17.40 0.31 0.00 0.31 7.20 0.01 0.00 0.01 17.60 0.30 0.00 0.30 7.40 0.01 0.00 0.01 17.80 0.30 0.00 0.30 7.60 0.01 0.00 0.01 18.00 0.29 0.00 0.29 7.80 0.01 0.00 0.01 18.20 0.28 0.00 0.28 8.00 0.02 0.00 0.02 18.40 0.28 0.00 0.28 8.20 0.02 0.00 0.02 18.60 0.27 0.00 0.27 8.40 0.03 0.00 0.03 18.80 0.27 0.00 0.27 8.60 0.03 0.00 0.03 19.00 0.26 0.00 0.26 8.80 0.04 0.00 0.04 19.20 0.25 0.00 0.25 9.00 0.05 0.00 0.05 19.40 0.25 0.00 0.25 9.20 0.05 0.00 0.05 19.60 0.24 0.00 0.24 9.40 0.06 0.00 0.06 19.80 0.24 0.00 0.24 9.60 0.07 0.00 0.07 20.00 0.23 0.00 0.23 9.80 0.09 0.00 0.09 10.00 0.10 0.00 0.10 10.20 0.11 0.00 0.11 Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 86 Time span=0.00-20.00 hrs, dt=0.01 hrs, 2001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Star-Ind method Subcatchmentl l S: Bioretention 1 Area Runoff Area=1.340 ac 23.88% Impervious Runoff Depth>2.89" Tc=5.0 min CN=80 Runoff=7.61 cfs 0.322 af Subcatchment14S: Bioretention 2 Area Runoff Area=0.880 ac 76.14% Impervious Runoff Depth>4.08" Tc=5.0 min CN=92 Runoff=6.40 cfs 0.299 af Subcatchmentl7S: Remaining Post SWM Runoff Area=1.980 ac 67.17% Impervious Runoff Depth>3.86" Flow Length=400' Tc=17.6 min CN=90 Runoff=9.36 cfs 0.636 af Subcatchment19S: Post Unrouted Area Runoff Area=0.100 ac 70.00% Impervious Runoff Depth>3.96" Flow Length=400' Tc=17.6 min CN=91 Runoff=0.48 cfs 0.033 af Pond 12P: Bioretention 1 Ponding Peak EIev=401.40' Storage=1,389 cf Inflow=7.61 cfs 0.322 af Primary=7.28 cfs 0.212 af Secondary=0.13 cfs 0.095 af Outflow=7.41 cfs 0.307 af Pond 13P: Bioretention 1 Media Peak EIev=396.18' Storage=5 cf Inflow=0.13 cfs 0.095 af Outflow=0.13 cfs 0.095 af Pond 15P: Bioretention 2 Ponding Peak EIev=400.01' Storage=1,968 cf Inflow=6.40 cfs 0.299 af Primary=5.69 cfs 0.146 af Secondary=0.21 cfs 0.153 af Outflow=5.90 cfs 0.299 af Pond 16P: Bioretention 2 Media Peak EIev=395.42' Storage=1,001 cf Inflow=0.21 cfs 0.153 af Outflow=0.21 cfs 0.131 af Pond 18P: Modified SWM Facility Peak EIev=393.67' Storage=11,883 cf Inflow=20.28 cfs 1.221 af Outflow=14.04 cfs 1.207 af Link 20L: Post Analysis Point 1 Inflow=14.52 cfs 1.240 af Primary=14.52 cfs 1.240 af Total Runoff Area = 4.300 ac Runoff Volume = 1.291 af Average Runoff Depth = 3.60" 44.42% Pervious = 1.910 ac 55.58% Impervious = 2.390 ac Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 87 Summary for Subcatchment 11S: Bioretention 1 Area Runoff = 7.61 cfs @ 11.96 hrs, Volume= 0.322 af, Depth> 2.89" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 10 YR Rainfall=5.25" Area (ac) CN Description 0.320 98 Paved parking, HSG C 1.000 74 >75% Grass cover, Good, HSG C 0.020 77 Woods, Poor, HSG C 1.340 80 Weighted Average 1.020 76.12% Pervious Area 0.320 23.88% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 11S: Bioretention 1 Area Hydrograph ❑Runoff" 8- L 51 cfs Type II 24 4r; j! 7 10 YR Rainfall=5.25" � 6 Runoff Area=1.340 ac Runoff Volume=0.322 af V 5 Runoff Depth>2.89" Y ,-24- Tc=5.0 m i n 3 CIv=80 2 o 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 88 Hydrograph for Subcatchment 11S: Bioretention 1 Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 1.04 0.10 0.11 0.20 0.01 0.00 0.00 10.60 1.10 0.12 0.13 0.40 0.02 0.00 0.00 10.80 1.16 0.14 0.16 0.60 0.03 0.00 0.00 11.00 1.23 0.17 0.19 0.80 0.04 0.00 0.00 11.20 1.32 0.20 0.25 1.00 0.06 0.00 0.00 11.40 1.43 0.25 0.33 1.20 0.07 0.00 0.00 11.60 1.61 0.34 0.67 1.40 0.08 0.00 0.00 11.80 2.26 0.73 2.81 1.60 0.09 0.00 0.00 12.00 3.48 1.62 6.49 1.80 0.10 0.00 0.00 12.20 3.67 1.77 1.00 2.00 0.12 0.00 0.00 12.40 3.81 1.88 0.73 2.20 0.13 0.00 0.00 12.60 3.90 1.96 0.51 2.40 0.14 0.00 0.00 12.80 3.98 2.03 0.44 2.60 0.15 0.00 0.00 13.00 4.05 2.09 0.38 2.80 0.17 0.00 0.00 13.20 4.11 2.14 0.34 3.00 0.18 0.00 0.00 13.40 4.17 2.18 0.31 3.20 0.19 0.00 0.00 13.60 4.22 2.22 0.28 3.40 0.21 0.00 0.00 13.80 4.26 2.26 0.25 3.60 0.22 0.00 0.00 14.00 4.31 2.30 0.23 3.80 0.24 0.00 0.00 14.20 4.34 2.33 0.22 4.00 0.25 0.00 0.00 14.40 4.38 2.36 0.21 4.20 0.27 0.00 0.00 14.60 4.41 2.39 0.20 4.40 0.28 0.00 0.00 14.80 4.45 2.42 0.19 4.60 0.30 0.00 0.00 15.00 4.48 2.45 0.18 4.80 0.31 0.00 0.00 15.20 4.51 2.47 0.18 5.00 0.33 0.00 0.00 15.40 4.54 2.50 0.17 5.20 0.35 0.00 0.00 15.60 4.57 2.52 0.16 5.40 0.37 0.00 0.00 15.80 4.60 2.54 0.15 5.60 0.38 0.00 0.00 16.00 4.62 2.56 0.14 5.80 0.40 0.00 0.00 16.20 4.64 2.58 0.14 6.00 0.42 0.00 0.00 16.40 4.67 2.60 0.14 6.20 0.44 0.00 0.00 16.60 4.69 2.62 0.13 6.40 0.46 0.00 0.00 16.80 4.71 2.64 0.13 6.60 0.48 0.00 0.00 17.00 4.73 2.66 0.13 6.80 0.50 0.00 0.00 17.20 4.76 2.68 0.12 7.00 0.52 0.00 0.00 17.40 4.78 2.70 0.12 7.20 0.54 0.00 0.00 17.60 4.80 2.72 0.12 7.40 0.56 0.00 0.01 17.80 4.82 2.73 0.11 7.60 0.58 0.00 0.01 18.00 4.84 2.75 0.11 7.80 0.61 0.00 0.01 18.20 4.85 2.77 0.11 8.00 0.63 0.01 0.01 18.40 4.87 2.78 0.11 8.20 0.65 0.01 0.02 18.60 4.89 2.80 0.10 8.40 0.68 0.01 0.02 18.80 4.91 2.81 0.10 8.60 0.71 0.02 0.03 19.00 4.92 2.83 0.10 8.80 0.74 0.02 0.03 19.20 4.94 2.84 0.09 9.00 0.77 0.03 0.04 19.40 4.95 2.85 0.09 9.20 0.81 0.03 0.05 19.60 4.97 2.87 0.09 9.40 0.84 0.04 0.05 19.80 4.98 2.88 0.08 9.60 0.87 0.05 0.05 20.00 5.00 2.89 0.08 9.80 0.91 0.06 0.06 10.00 0.95 0.07 0.08 10.20 0.99 0.08 0.09 Storm Calcs-update 2-12-2020 Type /l 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 89 Summary for Subcatchment 14S: Bioretention 2 Area Runoff = 6.40 cfs @ 11.96 hrs, Volume= 0.299 af, Depth> 4.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 10 YR Rainfall=5.25" Area (ac) CN Description 0.670 98 Paved parking, HSG C 0.160 74 >75% Grass cover, Good, HSG C 0.050 77 Woods, Poor, HSG C 0.880 92 Weighted Average 0.210 23.86% Pervious Area 0.670 76.14% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 14S: Bioretention 2 Area Hydrograph 7 Lu Runoffs 6.40 cfs Type 1124-h r 6 10 YR Rainfall=5.25 5 Runoff Area=0.880 ac 1/ Runoff Volume=0.299 af 4 Runoff Depth>4.08" LL Tc=5.0 min CN=92 2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16-17 18 19 20 Time (hours) Lo CD 0 N No 0) vi a) coii N d N C Er O ix C a 0 as v d L. -C Q 4. N C N N- C) N Cn N CD up et 01 OP Ps C) et C CD M O) N- CD CD el) et et M M N — — 0 CD 0 0 a) O) CD O OD 00 CO OD CO Ps Ps Ps f- CD CD CD ss. O e- e- NNMTrr- ^ C1r- CnMMNNNN 0000000000000000 Q. WI= j O O O O O O O N to 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 06 0 0 0 0 0 06 0 0 0 0 0 0 0 J ` C _IO n O• DTI M N et000�) OOCnTrOI - NOMN01s0�) ODMIs Ll) CANUn00 TrI- C) NTrCDCA'- 01UPPsC) MCnCD000 MC)CD N- O Cl) N Nt Nt Cn Cn CD N O CO co CA co s- N N M M Nt ILO Cn Cn CO CO CD CO f-- t` N N 00 00 00 00 Op Cn CA CA CA Cn O O O O O O O • Cl) O X U CD CD CD CD CD CD CDe- N N N M M M M M el M M 0, M M M M M M el M M M M M M M M 01 0101 0101 0, 07 � st of et et etNt C!) - W .E E) ♦+ co• C TrOCDMNMe- 0000N- OOOCn '— N- NCD .— etO0 — Cn00 etN- ONetCs0 MCDOOONetCnN- CA NetCnN- Op0 0C1 � O - e- NM1. CON `tCOOOCAC 0 .- e- NNMM " V NICnCnCnCOCOCOCDCONNN- N0000U00000OCACAOO)CT) CAO in .Ca c C) . o � Q a)^0 0 0 0 0 0 0 0 0 CD 0 0 0 0 0 0 0 CD CD 0 0 0 0 0 0 0 0 CD CD CD CD 0 0 0 CD CD CD 0 CD C) C)0 0 CD 0 CD CD CD 0 C.) V E rz Tt CO op O N et C0 00 O N et C0 00 O N et OD 00 0 N nt CD 00 O N et CD 00 O N et CO O0 0 N Tr CD OD O N et CO OD O N et CD 00 0 O 3 j =O 000 NNNN N el el el el el Ti Ti Tr Tr Ti Cn Cn Cn Cn CI) CO CO CO COCD N- N- Op 0000OOU) C C CA0CA0 N _CN I I. O N Q O w O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O Ccn O O O N M Cn N © CO c 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N QM I E 7 N O C7 (0 O` 0 _ _ a) N C V)N 00000000000000000000 � NNNMMetUPulCDN- 000nC .— NMTrCDPsC) 0NetIsCD etfs0 C N I . O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O N N N N N M M M Tr `0 O U r o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o O o 0 0 0 0 0 0 0 O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 es E N w.5 m E o ) •O aN O N M Tr CD N- OD C) O N M Tr Cn N- 00 cn NTr Cn N- op CD M Cn N- 000 N Tr CD 000 N Tr CD 00 M CI) 00 TrN et N- Cn CT O 000000000 NNNNNNMMMMMMetTr � TrTrCnCnUlululCOCDCOU) N- N- I- 0pOp00C) CACA c) U CD C) 0 0 0 CD CD CD 0 0 CD 0 0 0 CD CD 0 0 0 CD 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C) o 0 0 0 0 0 0 0 V ND a � E 0 a) 13 o000000000000a0OooaC) 00000000OooCo0o00000000000000Coo L a E ,_ ONTrC000ONTrCDOOONTrCOOOONTrCDOOONetCD000NTrCD000Nnt00000NetC0000NTr00O00NetC0000N 0 4) 13 H.- =O OOOOO NNNNNMMMMMTrTrTrTtTrCnCnCn 'l) LnCDCDCDCOCD N- N- N- N- N- O 000D0000CAC) CAC) C) 00 Nat Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 sin 08663 ©2019 HydroCAD Software Solutions LLC Page 91 Summary for Subcatchment 17S: Remaining Post SWM Facility Drainage Area Runoff = 9.36 cfs @ 12.09 hrs, Volume= 0.636 af, Depth> 3.86" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 10 YR Rainfall=5.25" Area (ac) CN Description 1.330 98 Paved parking, HSG C 0.650 74 >75% Grass cover, Good, HSG C 0.000 66 Woods, Poor, HSG B 1.980 90 Weighted Average 0.650 32.83% Pervious Area 1.330 67.17% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 0.3 200 0.0200 9.68 11.88 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.010 PVC, smooth interior 17.6 400 Total Subcatchment 17S: Remaining Post SWM Facility Drainage Area Hydrograph 10- ❑Runoff` 9.36 cS1 Type II 241hr a_ 10 YR Rainfal1=5.25" Runoff Area=1.980 ac 7- Runoff Volume=0.636 af 0 6 Runoff Depth>3.86" ,° 5= Flow Length=400' 47, Tc=17.6 min CN=90 /O z, 1= 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Ln O N N N M • O H M M d C N Q ct (u C) C c • Cl- M L. r L r -C i N LL m M CO U) M (D U) NNM (O C) V CO U) aO N N N O) (D U) MN m00 (OLO V MN CV - - 000) O) OO 00 N N (O (D U) U) V cc O N C) C) V U) (D OO M .7 O (0 V 0) `f (D (o (o V V M M M M M M N N N N N N N N N N N N a G c 0 0 0 0 0 0 0 (N ^ N- N O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 0 0 0 Cr J ++ O 0 N U) m Mo) U) MN (V M V MON� M a) N ,- U) a) ,- U) o0 M (OC M (O a O (V V CD OOON V U) Nm0 (V MU) (0N • 0. 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N N N N U O M c 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N QM M CC L (0 N NU, o L. -, CC 0 of 000000000000000000000000 NNN M V V Lo O (Df CO mOr- N M (OCO COON V CDmN - U '' 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 (V N N N N C") 10 CO .0 0 L o o 0 0 0 O O O O o O O o O o o O o o o o o O o o o O O O O O O O O O O O O O O O O O O O O O O O O O O C. C N C. X c i W O O NM '7 (D N o0 m0NM V U) N ) m — N V U] N000 - (M U) NmON V (D ) ON V (.0 a0 MU) a) N - V � U) m o ~ O 0 o' m O O O O O O O OO - - ,- ,- , - - - NNNCV NCV MM (") C) C) M V V V V �f) U) U) U) IOCOCOCOOt` f- f- o0aoaommm O T c o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 0 0 V ❑ i W E o 0 --o000000000000000000000000000000000000000000000000000 O E r2 ON V (DWON V COaOO N V COCOONV COCOON V WWON V WcOO NV- (DWON V (DWO N V COCOON V COCOO N Q N t) 8 00000 � - CV ( M M V NNNc') MM V V V V V Uo (DU) U) U) (OCD (D (O(O f� l� NNN 0000 m m0000 a0 m 0) m 0 0 NO d = Storm Calcs-update 2-12-2020 Type /l 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 93 Summary for Subcatchment 19S: Post Unrouted Area Runoff = 0.48 cfs @ 12.09 hrs, Volume= 0.033 af, Depth> 3.96" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 10 YR Rainfall=5.25" Area (ac) CN Description 0.070 98 Paved parking, HSG C 0.030 74 >75% Grass cover, Good, HSG C 0.000 66 Woods, Poor, HSG B 0.100 91 Weighted Average 0.030 30.00% Pervious Area 0.070 70.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 0.3 200 0.0200 9.68 11.88 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.010 PVC, smooth interior 17.6 400 Total Subcatchment 19S: Post Unrouted Area Hydrograph / ❑Runoff` 0.5 L0 48 crs Type 1124-h r 0.45 10 YR Rainfall=5.25" 0.4 Runoff_Area=0.100 ac 0.35 Runoff Volume=0.033 af 0.3 Runoff Depth>3.96" LL 0.25 Flow Length=400' 0.2 Tc=17.6 min 0.15 CN=91 0.1 0.05 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) _ _ D.- _ 7) � OO COCOCD CO CO CO CO Co Co Co J -...I -.I --A �1 (n On 0) CS) 0") CT CJ� 01 CT CJ� A A A A A co co Ca C..) W NN N) NN 00000 00 -� O- (D 0 N O Co en A N O Co en A N O Co O) A N O 00 cc A N 0 Co W ANO W 0 A N 0 W en A N) O 00 en A N 0 Co Cn A N 0 CD 0 A N CD (j 3 O -0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.- CD C) co 5. o -a ® 0_ Cu0 co co 0 co 0 0 0 0 0 0 co co co 0 0 0 0 0 0 0 0 0 co co co 0 co co co co co 0 0 0 0 0 co 0 co co 0 co o O o 0 0 0 0 0 0 n . - COCOCO Co CO cc -.1 -.1 v (n en en 0) U) 01 U90101 A A A A A W W W W W 'co N N N N N N ' . ' . . . Ix > 000 CD 00000�-6 O CD Cn — vA — vA — Co LI, co - Oo 0) A N O Co CT) A IV 00) 1CT Ca 10 CO �I Cr A N — CD Oo --ICI" A Ca IN O 6Co -.I OD A C.) N — O . 0 —! y O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O S 0 w 0 a' W 'co W N N N Ni -+ -� . . CD O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O N U) �"C 7 D Di CI) CO OBI U) W — CO V Cr) A Co N -, O O Cb -.I Cr) CT CT A W W N.) NJ N — — — 0000000 CD 00000000000000 N O. co O N O rn 7J - W-0 N 000000000000000000OO000000000000000000000CD0000000000� D . 0 N 0000000000000000000000000000000000000000000000000000No S N) 0 0 0 0 0 0 0 0 0 0 o O C) 0 00 C) o 0 C) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o O O O.- 0 IV G CO CO -1 _ s N Q C) (0 CO CO CO Co Co �lv v --.I �J (n CI) en Cn (n CTOTUICJ) Ut A A AAA W Ca C...) W Ca NNNNN 000 CO -. p CD n A N CDCoen A N CD en A N CDCoCID A N CD Co en A N CD Co en A N CD Co en A N CD Co en A N) CD en A N CD Co CT A y 3 ( C) O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O C) O O O O O C) O O O O O O O O O O O CD a) D n m -0 3' g) 0 2 O N A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A co coo W co Co N S n b600000COCOCO ep Cb Co 0D Co 00 -.1vv �100000 en in en A AA *co W W N N - - O 'OD eD Co CD A N CD A W N - - O u9-' (D N 0 co v CJ7 A N) ' CO '.1 Cn A N O Co (n W — CO --A A N) O --AA — CIO CP — CoA — OD N) �I -. 01 Co O -. J 00 O) � C.) N Co 0) OA = ID m. CD 7 j O X to o W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W N N N N 0 0 0 0 0 0 0 ? 0 CI) E Ip CDCD CO (D C000I OD cc cc en cc - -J v v v CD O Cn CD CJi CJ7CTCJ7 A A A W 'Co 'Co NIN -+ -� O O CO Co. J CT A co. •CT CI). CJt A A W m (O 0' pp -.ICJ, AN) -BCD --AC A N) 003 -1 A N 0 Oo On A -� co Cr) A — Oo Cr, IN co 01 — v cocold �1 O N co N O W Coo Ca Co Ca CO to O (n y r 0 o O o o O o o O o 0 0 0 00 00 0 00 0 0 0 o O o 0 0 0 0 0 0 o O o 0 0 0 0 0 0 0 0 o C) o o O o O (D 000000000000000000000000000000000000001w ca j000CD00ovo NNNNNNNNW CO W ACn �IAp) pplvA W W NNNN C CD N O. 'Q CD C1 Co )0 a v -D - v a) N O1 O N A No U) Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 95 Summary for Pond 12P: Bioretention 1 Ponding Inflow Area = 1.340 ac, 23.88% Impervious, Inflow Depth > 2.89" for 10 YR event Inflow = 7.61 cfs @ 11.96 hrs, Volume= 0.322 af Outflow = 7.41 cfs @ 11.98 hrs, Volume= 0.307 af, Atten= 3%, Lag= 1.0 min Primary = 7.28 cfs @ 11.98 hrs, Volume= 0.212 af Secondary= 0.13 cfs @ 11.98 hrs, Volume= 0.095 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 401.40' @ 11.98 hrs Surf.Area= 1,387 sf Storage= 1,389 cf Plug-Flow detention time=27.9 min calculated for 0.307 af(95% of inflow) Center-of-Mass det. time= 9.9 min ( 786.3 - 776.4 ) Volume Invert Avail.Storage Storage Description #1 400.17' 2,580 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 400.17 870 0 0 402.17 1,710 2,580 2,580 Device Routing Invert Outlet Devices #1 Secondary 400.17' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 1.00' #2 Primary 400.90' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=7.27 cfs @ 11.98 hrs HW=401.40' (Free Discharge) L2=Orifice/Grate (Weir Controls 7.27 cfs @ 2.31 fps) Secondary OutFlow Max=0.13 cfs @ 11.98 hrs HW=401.40' (Free Discharge) L1=Exfiltration ( Controls 0.13 cfs) Storm Calcs-update 2-12-2020 Type /I 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 96 Pond 12P: Bioretention 1 Ponding Hydrograph •Inflow �61 cts� _ Outflow Inflow Area=1.340 ac �..1�� 0Sary _ Secondary' 8- Peak Elev=401.401 1728% Storage=1,389 cfPr 6 40 H 5 0 4 31 0,11.0,4 2- 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 12P: Bioretention 1 Ponding Stage-Discharge / Total ❑Primary Secondary 402 c j/// 0 • 401 Orifice/Grate w Exfiltration / 0 2 4 6 8 10 12 14 16 Discharge (cfs) Storm Calcs-update 2-12-2020 Type /l 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 97 Pond 12P: Bioretention 1 Ponding Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,700 0 Surface ■Storage 402 d 0 C, d 401 w Custom Stage Data / 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 98 Hydrograph for Pond 12P: Bioretention 1 Ponding Time Inflow Storage Elevation Outflow Primary Secondary (hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0 400.17 0.00 0.00 0.00 0.50 0.00 0 400.17 0.00 0.00 0.00 1.00 0.00 0 400.17 0.00 0.00 0.00 1.50 0.00 0 400.17 0.00 0.00 0.00 2.00 0.00 0 400.17 0.00 0.00 0.00 2.50 0.00 0 400.17 0.00 0.00 0.00 3.00 0.00 0 400.17 0.00 0.00 0.00 3.50 0.00 0 400.17 0.00 0.00 0.00 4.00 0.00 0 400.17 0.00 0.00 0.00 4.50 0.00 0 400.17 0.00 0.00 0.00 5.00 0.00 0 400.17 0.00 0.00 0.00 5.50 0.00 0 400.17 0.00 0.00 0.00 6.00 0.00 0 400.17 0.00 0.00 0.00 6.50 0.00 0 400.17 0.00 0.00 0.00 7.00 0.00 0 400.17 0.00 0.00 0.00 7.50 0.01 1 400.17 0.01 0.00 0.01 8.00 0.01 3 400.17 0.01 0.00 0.01 8.50 0.02 5 400.18 0.02 0.00 0.02 9.00 0.04 8 400.18 0.04 0.00 0.04 9.50 0.05 11 400.18 0.05 0.00 0.05 10.00 0.08 15 400.19 0.07 0.00 0.07 10.50 0.12 42 400.22 0.08 0.00 0.08 11.00 0.19 161 400.35 0.09 0.00 0.09 11.50 0.38 486 400.67 0.10 0.00 0.10 12.00 6.49 1,365 401.38 7.04 6.91 0.13 12.50 0.61 852 400.99 0.65 0.54 0.11 13.00 0.38 815 400.96 0.39 0.28 0.11 13.50 0.29 799 400.94 0.30 0.19 0.11 14.00 0.23 786 400.93 0.24 0.13 0.11 14.50 0.20 780 400.93 0.21 0.10 0.11 15.00 0.18 774 400.92 0.19 0.08 0.11 15.50 0.16 769 400.92 0.17 0.06 0.11 16.00 0.14 763 400.91 0.15 0.04 0.11 16.50 0.13 760 400.91 0.13 0.03 0.11 17.00 0.13 758 400.91 0.13 0.02 0.11 17.50 0.12 754 400.91 0.12 0.01 0.11 18.00 0.11 750 400.90 0.11 0.00 0.11 18.50 0.10 745 400.90 0.11 0.00 0.11 19.00 0.10 730 400.89 0.11 0.00 0.11 19.50 0.09 703 400.86 0.11 0.00 0.11 20.00 0.08 664 400.83 0.11 0.00 0.11 Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 99 Stage-Discharge for Pond 12P: Bioretention 1 Ponding Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary (feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs) 400.17 0.00 0.00 0.00 401.21 3.67 3.55 0.12 400.19 0.08 0.00 0.08 401.23 4.02 3.89 0.12 400.21 0.08 0.00 0.08 401.25 4.38 4.25 0.12 400.23 0.08 0.00 0.08 401.27 4.75 4.62 0.12 400.25 0.08 0.00 0.08 401.29 5.13 5.00 0.12 400.27 0.08 0.00 0.08 401.31 5.52 5.39 0.13 400.29 0.09 0.00 0.09 401.33 5.92 5.79 0.13 400.31 0.09 0.00 0.09 401.35 6.33 6.20 0.13 400.33 0.09 0.00 0.09 401.37 6.75 6.62 0.13 400.35 0.09 0.00 0.09 401.39 7.18 7.05 0.13 400.37 0.09 0.00 0.09 401.41 7.61 7.48 0.13 400.39 0.09 0.00 0.09 401.43 8.06 7.93 0.13 400.41 0.09 0.00 0.09 401.45 8.51 8.38 0.13 400.43 0.09 0.00 0.09 401.47 8.97 8.84 0.13 400.45 0.09 0.00 0.09 401.49 9.44 9.31 0.13 400.47 0.09 0.00 0.09 401.51 9.92 9.79 0.13 400.49 0.09 0.00 0.09 401.53 10.41 10.27 0.13 400.51 0.09 0.00 0.09 401.55 10.90 10.77 0.13 400.53 0.09 0.00 0.09 401.57 11.40 11.27 0.14 400.55 0.10 0.00 0.10 401.59 11.91 11.78 0.14 400.57 0.10 0.00 0.10 401.61 12.43 12.29 0.14 400.59 0.10 0.00 0.10 401.63 12.95 12.81 0.14 400.61 0.10 0.00 0.10 401.65 13.24 13.10 0.14 400.63 0.10 0.00 0.10 401.67 13.41 13.27 0.14 400.65 0.10 0.00 0.10 401.69 13.58 13.44 0.14 400.67 0.10 0.00 0.10 401.71 13.75 13.61 0.14 400.69 0.10 0.00 0.10 401.73 13.92 13.78 0.14 400.71 0.10 0.00 0.10 401.75 14.09 13.95 0.14 400.73 0.10 0.00 0.10 401.77 14.25 14.11 0.14 400.75 0.10 0.00 0.10 401.79 14.41 14.27 0.14 400.77 0.10 0.00 0.10 401.81 14.57 14.43 0.14 400.79 0.10 0.00 0.10 401.83 14.73 14.59 0.15 400.81 0.11 0.00 0.11 401.85 14.89 14.74 0.15 400.83 0.11 0.00 0.11 401.87 15.05 14.90 0.15 400.85 0.11 0.00 0.11 401.89 15.20 15.05 0.15 400.87 0.11 0.00 0.11 401.91 15.35 15.20 0.15 400.89 0.11 0.00 0.11 401.93 15.50 15.35 0.15 400.91 0.13 0.02 0.11 401.95 15.65 15.50 0.15 400.93 0.22 0.11 0.11 401.97 15.80 15.65 0.15 400.95 0.34 0.23 0.11 401.99 15.94 15.79 0.15 400.97 0.49 0.38 0.11 402.01 16.09 15.94 0.15 400.99 0.67 0.55 0.11 402.03 16.23 16.08 0.15 401.01 0.86 0.75 0.11 402.05 16.38 16.22 0.15 401.03 1.08 0.96 0.11 402.07 16.52 16.36 0.16 401.05 1.31 1.19 0.11 402.09 16.66 16.50 0.16 401.07 1.56 1.44 0.12 402.11 16.80 16.64 0.16 401.09 1.82 1.70 0.12 402.13 16.93 16.78 0.16 401.11 2.09 1.98 0.12 402.15 17.07 16.91 0.16 401.13 2.38 2.27 0.12 402.17 17.21 17.05 0.16 401.15 2.69 2.57 0.12 401.17 3.00 2.88 0.12 401.19 3.33 3.21 0.12 Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 100 Stage-Area-Storage for Pond 12P: Bioretention 1 Ponding Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 400.17 870 0 401.21 1,307 1,132 400.19 878 17 401.23 1,315 1,158 400.21 887 35 401.25 1,324 1,185 400.23 895 53 401.27 1,332 1,211 400.25 904 71 401.29 1,340 1,238 400.27 912 89 401.31 1,349 1,265 400.29 920 107 401.33 1,357 1,292 400.31 929 126 401.35 1,366 1,319 400.33 937 145 401.37 1,374 1,346 400.35 946 163 401.39 1,382 1,374 400.37 954 182 401.41 1,391 1,402 400.39 962 202 401.43 1,399 1,430 400.41 971 221 401.45 1,408 1,458 400.43 979 240 401.47 1,416 1,486 400.45 988 260 401.49 1,424 1,514 400.47 996 280 401.51 1,433 1,543 400.49 1,004 300 401.53 1,441 1,572 400.51 1,013 320 401.55 1,450 1,601 400.53 1,021 340 401.57 1,458 1,630 400.55 1,030 361 401.59 1,466 1,659 400.57 1,038 382 401.61 1,475 1,688 400.59 1,046 402 401.63 1,483 1,718 400.61 1,055 423 401.65 1,492 1,748 400.63 1,063 445 401.67 1,500 1,778 400.65 1,072 466 401.69 1,508 1,808 400.67 1,080 488 401.71 1,517 1,838 400.69 1,088 509 401.73 1,525 1,868 400.71 1,097 531 401.75 1,534 1,899 400.73 1,105 553 401.77 1,542 1,930 400.75 1,114 575 401.79 1,550 1,961 400.77 1,122 598 401.81 1,559 1,992 400.79 1,130 620 401.83 1,567 2,023 400.81 1,139 643 401.85 1,576 2,054 400.83 1,147 666 401.87 1,584 2,086 400.85 1,156 689 401.89 1,592 2,118 400.87 1,164 712 401.91 1,601 2,150 400.89 1,172 735 401.93 1,609 2,182 400.91 1,181 759 401.95 1,618 2,214 400.93 1,189 782 401.97 1,626 2,246 400.95 1,198 806 401.99 1,634 2,279 400.97 1,206 830 402.01 1,643 2,312 400.99 1,214 855 402.03 1,651 2,345 401.01 1,223 879 402.05 1,660 2,378 401.03 1,231 904 402.07 1,668 2,411 401.05 1,240 928 402.09 1,676 2,445 401.07 1,248 953 402.11 1,685 2,478 401.09 1,256 978 402.13 1,693 2,512 401.11 1,265 1,003 402.15 1,702 2,546 401.13 1,273 1,029 402.17 1,710 2,580 401.15 1,282 1,054 401.17 1,290 1,080 401.19 1,298 1,106 Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 101 Summary for Pond 13P: Bioretention 1 Media [44] Hint: Outlet device#1 is below defined storage Inflow = 0.13 cfs @ 11.98 hrs, Volume= 0.095 of Outflow = 0.13 cfs @ 11.99 hrs, Volume= 0.095 af, Atten= 0%, Lag= 0.6 min Primary = 0.13 cfs @ 11.99 hrs, Volume= 0.095 of Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 396.18'@ 11.99 hrs Surf.Area= 870 sf Storage= 5 cf Plug-Flow detention time=0.6 min calculated for 0.095 of(100% of inflow) Center-of-Mass det. time=0.3 min ( 881.4 -881.1 ) Volume Invert Avail.Storage Storage Description #1 396.17' 1,131 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 396.17 870 0.0 0 0 398.17 870 40.0 696 696 400.17 870 25.0 435 1,131 Device Routing Invert Outlet Devices #1 Primary 395.24' 4.0"Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=0.37 cfs @ 11.99 hrs HW=396.18' (Free Discharge) L1=Orifice/Grate (Orifice Controls 0.37 cfs @ 4.24 fps) Storm Calcs-update 2-12-2020 Type /l 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 102 Pond 13P: Bioretention 1 Media Hydrograph ■Inflow 0.14= 10.13 cfs I ■Primary Peak EIev=396.18' 1°13' o:;?_ Storage=5 cf 0.09 a 0.08 0 0.07 E LL 0.06- 0.05 0.04 0.03 0.02] 0.01 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 13P: Bioretention 1 Media Stage-Discharge 400 ■Primary 399 d ir as c 0 398 d w 397 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35. 04 '0.4 50':5' .0.7...0..7.5......... . ..... 0.55 0.6 0.65 0.8 0.65 0.9 Discharge (cfs) Storm Calcs-update 2-12-2020 Type /l 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 103 Pond 13P: Bioretention 1 Media Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 ■Surface ■Storage 400 0 399 411 c 4 w 398 j 397 0 100 200 300 400 500 600 700 800 900 1,000 1,100 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 104 Hydrograph for Pond 13P: Bioretention 1 Media Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 396.17 0.00 0.50 0.00 0 396.17 0.00 1.00 0.00 0 396.17 0.00 1.50 0.00 0 396.17 0.00 2.00 0.00 0 396.17 0.00 2.50 0.00 0 396.17 0.00 3.00 0.00 0 396.17 0.00 3.50 0.00 0 396.17 0.00 4.00 0.00 0 396.17 0.00 4.50 0.00 0 396.17 0.00 5.00 0.00 0 396.17 0.00 5.50 0.00 0 396.17 0.00 6.00 0.00 0 396.17 0.00 6.50 0.00 0 396.17 0.00 7.00 0.00 0 396.17 0.00 7.50 0.01 0 396.17 0.01 8.00 0.01 0 396.17 0.01 8.50 0.02 1 396.17 0.02 9.00 0.04 1 396.17 0.04 9.50 0.05 2 396.18 0.05 10.00 0.07 3 396.18 0.07 10.50 0.08 3 396.18 0.08 11.00 0.09 3 396.18 0.09 11.50 0.10 4 396.18 0.10 12.00 0.13 5 396.18 0.13 12.50 0.11 4 396.18 0.11 13.00 0.11 4 396.18 0.11 13.50 0.11 4 396.18 0.11 14.00 0.11 4 396.18 0.11 14.50 0.11 4 396.18 0.11 15.00 0.11 4 396.18 0.11 15.50 0.11 4 396.18 0.11 16.00 0.11 4 396.18 0.11 16.50 0.11 4 396.18 0.11 17.00 0.11 4 396.18 0.11 17.50 0.11 4 396.18 0.11 18.00 0.11 4 396.18 0.11 18.50 0.11 4 396.18 0.11 19.00 0.11 4 396.18 0.11 19.50 0.11 4 396.18 0.11 20.00 0.11 4 396.18 0.11 Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 105 Stage-Discharge for Pond 13P: Bioretention 1 Media Elevation Primary Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) (feet) (cfs) 396.17 0.00 397.21 0.56 398.25 0.71 399.29 0.83 396.19 0.37 397.23 0.57 398.27 0.71 399.31 0.83 396.21 0.38 397.25 0.57 398.29 0.71 399.33 0.83 396.23 0.38 397.27 0.57 398.31 0.72 399.35 0.83 396.25 0.39 397.29 0.58 398.33 0.72 399.37 0.84 396.27 0.39 397.31 0.58 398.35 0.72 399.39 0.84 396.29 0.39 397.33 0.58 398.37 0.72 399.41 0.84 396.31 0.40 397.35 0.59 398.39 0.73 399.43 0.84 396.33 0.40 397.37 0.59 398.41 0.73 399.45 0.84 396.35 0.41 397.39 0.59 398.43 0.73 399.47 0.85 396.37 0.41 397.41 0.59 398.45 0.73 399.49 0.85 396.39 0.42 397.43 0.60 398.47 0.74 399.51 0.85 396.41 0.42 397.45 0.60 398.49 0.74 399.53 0.85 396.43 0.43 397.47 0.60 398.51 0.74 399.55 0.86 396.45 0.43 397.49 0.61 398.53 0.74 399.57 0.86 396.47 0.43 397.51 0.61 398.55 0.74 399.59 0.86 396.49 0.44 397.53 0.61 398.57 0.75 399.61 0.86 396.51 0.44 397.55 0.62 398.59 0.75 399.63 0.86 396.53 0.45 397.57 0.62 398.61 0.75 399.65 0.87 396.55 0.45 397.59 0.62 398.63 0.75 399.67 0.87 396.57 0.45 397.61 0.62 398.65 0.76 399.69 0.87 396.59 0.46 397.63 0.63 398.67 0.76 399.71 0.87 396.61 0.46 397.65 0.63 398.69 0.76 399.73 0.87 396.63 0.46 397.67 0.63 398.71 0.76 399.75 0.88 396.65 0.47 397.69 0.63 398.73 0.77 399.77 0.88 396.67 0.47 397.71 0.64 398.75 0.77 399.79 0.88 396.69 0.48 397.73 0.64 398.77 0.77 399.81 0.88 396.71 0.48 397.75 0.64 398.79 0.77 399.83 0.88 396.73 0.48 397.77 0.65 398.81 0.78 399.85 0.89 396.75 0.49 397.79 0.65 398.83 0.78 399.87 0.89 396.77 0.49 397.81 0.65 398.85 0.78 399.89 0.89 396.79 0.49 397.83 0.65 398.87 0.78 399.91 0.89 396.81 0.50 397.85 0.66 398.89 0.78 399.93 0.89 396.83 0.50 397.87 0.66 398.91 0.79 399.95 0.90 396.85 0.50 397.89 0.66 398.93 0.79 399.97 0.90 396.87 0.51 397.91 0.66 398.95 0.79 399.99 0.90 396.89 0.51 397.93 0.67 398.97 0.79 400.01 0.90 396.91 0.52 397.95 0.67 398.99 0.80 400.03 0.90 396.93 0.52 397.97 0.67 399.01 0.80 400.05 0.91 396.95 0.52 397.99 0.68 399.03 0.80 400.07 0.91 396.97 0.53 398.01 0.68 399.05 0.80 400.09 0.91 396.99 0.53 398.03 0.68 399.07 0.80 400.11 0.91 397.01 0.53 398.05 0.68 399.09 0.81 400.13 0.91 397.03 0.54 398.07 0.69 399.11 0.81 400.15 0.92 397.05 0.54 398.09 0.69 399.13 0.81 400.17 0.92 397.07 0.54 398.11 0.69 399.15 0.81 397.09 0.55 398.13 0.69 399.17 0.82 397.11 0.55 398.15 0.70 399.19 0.82 397.13 0.55 398.17 0.70 399.21 0.82 397.15 0.55 398.19 0.70 399.23 0.82 397.17 0.56 398.21 0.70 399.25 0.82 397.19 0.56 398.23 0.71 399.27 0.83 Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 106 Stage-Area-Storage for Pond 13P: Bioretention 1 Media Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 396.17 870 0 398.77 870 827 396.22 870 17 398.82 870 837 396.27 870 35 398.87 870 848 396.32 870 52 398.92 870 859 396.37 870 70 398.97 870 870 396.42 870 87 399.02 870 881 396.47 870 104 399.07 870 892 396.52 870 122 399.12 870 903 396.57 870 139 399.17 870 914 396.62 870 157 399.22 870 924 396.67 870 174 399.27 870 935 396.72 870 191 399.32 870 946 396.77 870 209 399.37 870 957 396.82 870 226 399.42 870 968 396.87 870 244 399.47 870 979 396.92 870 261 399.52 870 990 396.97 870 278 399.57 870 1,000 397.02 870 296 399.62 870 1,011 397.07 870 313 399.67 870 1,022 397.12 870 331 399.72 870 1,033 397.17 870 348 399.77 870 1,044 397.22 870 365 399.82 870 1,055 397.27 870 383 399.87 870 1,066 397.32 870 400 399.92 870 1,077 397.37 870 418 399.97 870 1,088 397.42 870 435 400.02 870 1,098 397.47 870 452 400.07 870 1,109 397.52 870 470 400.12 870 1,120 397.57 870 487 400.17 870 1,131 397.62 870 505 397.67 870 522 397.72 870 539 397.77 870 557 397.82 870 574 397.87 870 592 397.92 870 609 397.97 870 626 398.02 870 644 398.07 870 661 398.12 870 679 398.17 870 696 398.22 870 707 398.27 870 718 398.32 870 729 398.37 870 739 398.42 870 750 398.47 870 761 398.52 870 772 398.57 870 783 398.62 870 794 398.67 870 805 398.72 870 816 Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 107 Summary for Pond 15P: Bioretention 2 Ponding Inflow Area = 0.880 ac, 76.14% Impervious, Inflow Depth > 4.08" for 10 YR event Inflow = 6.40 cfs @ 11.96 hrs, Volume= 0.299 af Outflow = 5.90 cfs @ 11.99 hrs, Volume= 0.299 af, Atten= 8%, Lag= 1.7 min Primary = 5.69 cfs @ 11.99 hrs, Volume= 0.146 af Secondary= 0.21 cfs @ 11.99 hrs, Volume= 0.153 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 400.01'@ 11.99 hrs Surf.Area= 2,285 sf Storage= 1,968 cf Plug-Flow detention time=24.4 min calculated for 0.299 af(100% of inflow) Center-of-Mass det. time=24.0 min ( 767.5 -743.5 ) Volume Invert Avail.Storage Storage Description #1 399.00' 4,550 cf Custom Stage Data (Prismatic)Listed below(Recaic) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 399.00 1,596 0 0 401.00 2,954 4,550 4,550 Device Routing Invert Outlet Devices #1 Secondary 399.00' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 1.00' #2 Primary 399.50' 18.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=5.67 cfs @ 11.99 hrs HW=400.01' (Free Discharge) L2=Orifice/Grate (Weir Controls 5.67 cfs @ 2.34 fps) Secondary OutFlow Max=0.21 cfs @ 11.99 hrs HW=400.01' (Free Discharge) L1=Exfiltration ( Controls 0.21 cfs) Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 108 Pond 15P: Bioretention 2 Ponding Hydrograph 1'i,l Inflow [6.40 cfsl Outflow ry 7 /. Inflow Area=0.880 ac °se Secondary 5.90 cfs Peak Elev=400.01' '�;69c� 6 Storage=1,968 cf % 5 I�.� !1000 - 4 LI- 3 LEM 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 15P: Bioretention 2 Ponding Stage-Discharge II Total „z/ 401 ■Primary I ■Secondary • brifice/Grate 4 Exfiltration 399 0 1 2 3 4 5 6 7 8 9 10 Discharge (cfs) Storm Calcs-update 2-12-2020 Type /l 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 109 Pond 15P: Bioretention 2 Ponding Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2200 2,400 2,600 2,800 Surface _❑Storage 401 / II II i i m Cp 400 A m w Customjaalea 399 ( / 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 Storage(cubic-feet) O 0 0 N N L0 N N II M . N d MD er C CC d 0 L C) _ � (--T,,OOOOOOOO - - NMMNrNrLoCDI- mOMLoLor, co cowcocor— r,D (DtnmN. r- p D N @ ,_ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N ,- ,- ,- , .- 0 0 0 0 N = D 00000000000000000000000000000000000000000 O o a) a u Q. N W J = J 0 ?. 0 0 0 O O O O O O O O O O O O O O O O O 0 O O O O LU e- 0 0 0 0 0 0 0 0 0 0 0 0 to - (6 e 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CD M '- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C c E 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1!) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o d = O I- (/) 0 N m 3 00000000 A- NM t V D I- 6)M ' Ln ( OM LC en N ' 6) C aO N- N f- (DLLf) O) N- N- M (0 ON 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 L n C) (V , . . r r . /- ,- r- 0 0 0 0 a i 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N O O O O O O O O O O O O O O O O O O N O O M Q C U 0 a C ^0000000000000 � .- '- r- .- NC) 6) OI- COIN ,- 6) CD N (D 6) M Ln 00 2 O N OO O OOOOO O OO O O P 00000 O 000 N O In It) It) LU � d"tt MN N '- OOOOO L N 6) 67 67 6) O) 6) 6) O) 6) 6) 6) O) O) 6) O) O) 6) 6) 6) 6) O) O) 6) O O 6) 6) 6) 6) 6) O) 6) 6) 6) 6) 6) 6) O) 0 O) 6) _ w- 0 M (") (') M M () M (') C) M M M M M CM M C) M M M M M M M M M M M M M M M M M M M M CM M M O a) O. W N 0 M O N " Q) 0000000 ,- NMILn N- 006) - N LC) O NN Nt V CD CD L L 6) OOMN 006) 00 V 6) 0) U) - C) N O Q) p) Q) - - '- NNN LC) N ) ' CD N Q) CD ON 6) I- LUN � '- '- ' 0 (6 Q) Nr O O6) 6) CO CO 00 N- (D ' MN N Q M p e- U I O (0 >. (i) O c• C in C' C N OOOOOOOON- N- NMNI- N—L (M DI� 6) OMLOVMI� MNf� � 6) OLn NI- OO Mr---. . m = E 0 0 w M 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N a M v N N 0 0 0 0 0 0 0 N f- 0 O O O O O O O O O O O O O O O O O O O O O O O O u 0 0 0 0 0 0 0 0 0 0 0 06 0 0 0 ") TO - () -0 < E (`p 0 Q ^o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o O O o 0 0 0 0 0 0 0 0 o O o Q i p E L' 0Ln0LU0Ln0Ln0Ln0Ln0LUPLU0LUOLUOLUOLn0LU0LUOLn0Ln0LUOLnou) ou) o 0 Q) t) � D 00 - - N (V M (0 Ln L15 CD (D N- N 00006) 6) 00 N N CO CO Ni Ni Ili LC) (0 (D I- N- C 006) 6) O Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 111 Stage-Discharge for Pond 15P: Bioretention 2 Ponding Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary (feet) (cfs) (cfs) (cfs) _ (feet) (cfs) (cfs) (cfs) 399.00 0.00 0.00 0.00 400.04 6.33 6.11 0.21 399.02 0.15 0.00 0.15 400.06 6.58 6.37 0.21 399.04 0.15 0.00 0.15 400.08 6.70 6.48 0.22 399.06 0.15 0.00 0.15 400.10 6.81 6.59 0.22 399.08 0.15 0.00 0.15 400.12 6.92 6.70 0.22 399.10 0.15 0.00 0.15 400.14 7.03 6.81 0.22 399.12 0.16 0.00 0.16 400.16 7.13 6.91 0.22 399.14 0.16 0.00 0.16 400.18 7.24 7.02 0.22 399.16 0.16 0.00 0.16 400.20 7.34 7.12 0.22 399.18 0.16 0.00 0.16 400.22 7.44 7.22 0.23 399.20 0.16 0.00 0.16 400.24 7.55 7.32 0.23 399.22 0.16 0.00 0.16 400.26 7.65 7.42 0.23 399.24 0.16 0.00 0.16 400.28 7.74 7.51 0.23 399.26 0.16 0.00 0.16 400.30 7.84 7.61 0.23 399.28 0.17 0.00 0.17 400.32 7.94 7.71 0.23 399.30 0.17 0.00 0.17 400.34 8.03 7.80 0.23 399.32 0.17 0.00 0.17 400.36 8.12 7.89 0.23 399.34 0.17 0.00 0.17 400.38 8.22 7.98 0.24 399.36 0.17 0.00 0.17 400.40 8.31 8.07 0.24 399.38 0.17 0.00 0.17 400.42 8.40 8.16 0.24 399.40 0.17 0.00 0.17 400.44 8.49 8.25 0.24 399.42 0.17 0.00 0.17 400.46 8.58 8.34 0.24 399.44 0.18 0.00 0.18 400.48 8.66 8.42 0.24 399.46 0.18 0.00 0.18 400.50 8.75 8.51 0.24 399.48 0.18 0.00 0.18 400.52 8.84 8.59 0.24 399.50 0.18 0.00 0.18 400.54 8.92 8.68 0.25 399.52 0.22 0.04 0.18 400.56 9.01 8.76 0.25 399.54 0.31 0.12 0.18 400.58 9.09 8.84 0.25 399.56 0.41 0.23 0.18 400.60 9.17 8.92 0.25 399.58 0.53 0.35 0.18 400.62 9.26 9.00 0.25 399.60 0.67 0.49 0.19 400.64 9.34 9.08 0.25 399.62 0.83 0.64 0.19 400.66 9.42 9.16 0.25 399.64 1.00 0.81 0.19 400.68 9.50 9.24 0.25 399.66 1.18 0.99 0.19 400.70 9.58 9.32 0.26 399.68 1.37 1.18 0.19 400.72 9.66 9.40 0.26 399.70 1.57 1.38 0.19 400.74 9.73 9.47 0.26 399.72 1.78 1.59 0.19 400.76 9.81 9.55 0.26 399.74 2.01 1.81 0.19 400.78 9.89 9.63 0.26 399.76 2.24 2.04 0.20 400.80 9.96 9.70 0.26 399.78 2.48 2.28 0.20 400.82 10.04 9.78 0.26 399.80 2.73 2.53 0.20 400.84 10.11 9.85 0.26 399.82 2.99 2.79 0.20 400.86 10.19 9.92 0.27 399.84 3.26 3.05 0.20 400.88 10.26 10.00 0.27 399.86 3.53 3.33 0.20 400.90 10.34 10.07 0.27 399.88 3.81 3.61 0.20 400.92 10.41 10.14 0.27 399.90 4.10 3.90 0.20 400.94 10.48 10.21 0.27 399.92 4.40 4.19 0.21 400.96 10.55 10.28 0.27 399.94 4.70 4.50 0.21 400.98 10.62 10.35 0.27 399.96 5.02 4.81 0.21 401.00 10.70 10.42 0.27 399.98 5.33 5.12 0.21 400.00 5.66 5.45 0.21 400.02 5.99 5.78 0.21 Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 112 Stage-Area-Storage for Pond 15P: Bioretention 2 Ponding Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 399.00 1,596 0 400.04 2,302 2,027 399.02 1,610 32 400.06 2,316 2,073 399.04 1,623 64 400.08 2,329 2,120 399.06 1,637 97 400.10 2,343 2,166 399.08 1,650 130 400.12 2,356 2,213 399.10 1,664 163 400.14 2,370 2,261 399.12 1,677 196 400.16 2.384 2,308 399.14 1,691 230 400.18 2,397 2,356 399.16 1,705 264 400.20 2,411 2,404 399.18 1,718 298 400.22 2,424 2,452 399.20 1,732 333 400.24 2,438 2,501 399.22 1,745 368 400.26 2,452 2,550 399.24 1,759 403 400.28 2,465 2,599 399.26 1,773 438 400.30 2,479 2,649 399.28 1,786 473 400.32 2,492 2,698 399.30 1,800 509 400.34 2,506 2,748 399.32 1,813 545 400.36 2,519 2,798 399.34 1,827 582 400.38 2,533 2,849 399.36 1,840 619 400.40 2,547 2,900 399.38 1,854 656 400.42 2,560 2,951 399.40 1,868 693 400.44 2,574 3,002 399.42 1,881 730 400.46 2,587 3,054 399.44 1,895 768 400.48 2,601 3,106 399.46 1,908 806 400.50 2,615 3,158 399.48 1,922 844 400.52 2,628 3,210 399.50 1,936 883 400.54 2,642 3,263 399.52 1,949 922 400.56 2,655 3,316 399.54 1,963 961 400.58 2.669 3,369 399.56 1,976 1,000 400.60 2.682 3,423 399.58 1,990 1,040 400.62 2,696 3,477 399.60 2,003 1,080 400.64 2,710 3,531 399.62 2,017 1,120 400.66 2,723 3,585 399.64 2,031 1,160 400.68 2,737 3,639 399.66 2,044 1,201 400.70 2,750 3,694 399.68 2,058 1,242 400.72 2,764 3,749 399.70 2,071 1,284 400.74 2,777 3,805 399.72 2,085 1,325 400.76 2,791 3,861 399.74 2,098 1,367 400.78 2,805 3,917 399.76 2,112 1,409 400.80 2,818 3,973 399.78 2,126 1,451 400.82 2,832 4,029 399.80 2,139 1,494 400.84 2,845 4,086 399.82 2,153 1,537 400.86 2,859 4,143 399.84 2,166 1,580 400.88 2,873 4,200 399.86 2,180 1,624 400.90 2,886 4,258 399.88 2,194 1,667 400.92 2,900 4,316 399.90 2,207 1,711 400.94 2,913 4,374 399.92 2,221 1,756 400.96 2,927 4,432 399.94 2,234 1,800 400.98 2,940 4,491 399.96 2,248 1,845 401.00 2,954 4,550 399.98 2,261 1,890 400.00 2,275 1,936 400.02 2,289 1,981 Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 113 Summary for Pond 16P: Bioretention 2 Media Inflow = 0.21 cfs @ 11.99 hrs, Volume= 0.153 af Outflow = 0.21 cfs © 12.04 hrs, Volume= 0.131 af, Atten= 2%, Lag= 3.5 min Primary = 0.21 cfs @ 12.04 hrs, Volume= 0.131 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 395.42' @ 12.04 hrs Surf.Area= 1,500 sf Storage= 1,001 cf Plug-Flow detention time= 111.5 min calculated for 0.131 of(86% of inflow) Center-of-Mass det. time=61.6 min ( 868.9 - 807.2 ) Volume Invert Avail.Storage Storage Description #1 393.75' 2,419 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 393.75 1,500 0.0 0 0 395.75 1,500 40.0 1,200 1,200 399.00 1,500 25.0 1,219 2,419 Device Routing Invert Outlet Devices #1 Primary 395.24' 4.0"Vert. Orifice/Grate X 3.00 C= 0.600 Primary OutFlow Max=0.21 cfs @ 12.04 hrs HW=395.42' (Free Discharge) L1=Orifice/Grate (Orifice Controls 0.21 cfs @ 1.44 fps) Pond 16P: Bioretention 2 Media Hydrograph �- !Inflow II 0.23 4 /%� I o.2i ors ❑Primary 0.221 7 _Peak EIe�-i�]=395.42 I1 _0_21 cfs 018 Storage=1 ,001=c 0.17- - - 0.15- 1 0.13= 0.12 0 0.11 , ---- LL o.1H - - --- 0.09 -- 0.08t" - 0.07: - 0.06 0.05 0.04 0.03 • - 0.02= 0.01 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 114 Pond 16P: Bioretention 2 Media Stage-Discharge 399/ ■Primary 398 397- d .qc 0 396 w 395 394- 0 1 2 Discharge (cfs) Pond 16P: Bioretention 2 Media Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 0 Surface` ■Storage' 399--/// 398 397- 0 c 0 0 396 395- 394- 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 115 Hydrograph for Pond 16P: Bioretention 2 Media Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 393.75 0.00 0.50 0.00 0 393.75 0.00 1.00 0.00 0 393.75 0.00 1.50 0.00 0 393.75 0.00 2.00 0.00 0 393.75 0.00 2.50 0.00 0 393.75 0.00 3.00 0.00 0 393.75 0.00 3.50 0.00 4 393.76 0.00 4.00 0.01 16 393.78 0.00 4.50 0.01 37 393.81 0.00 5.00 0.02 67 393.86 0.00 5.50 0.03 107 393.93 0.00 6.00 0.03 158 394.01 0.00 6.50 0.04 219 394.12 0.00 7.00 0.04 292 394.24 0.00 7.50 0.05 377 394.38 0.00 8.00 0.06 473 394.54 0.00 8.50 0.07 586 394.73 0.00 9.00 0.09 732 394.97 0.00 9.50 0.10 907 395.26 0.01 10.00 0.13 971 395.37 0.12 10.50 0.15 983 395.39 0.15 11.00 0.15 984 395.39 0.15 11.50 0.17 987 395.40 0.16 12.00 0.21 1,001 395.42 0.21 12.50 0.18 994 395.41 0.19 13.00 0.18 993 395.41 0.18 13.50 0.18 993 395.41 0.18 14.00 0.18 993 395.40 0.18 14.50 0.18 992 395.40 0.18 15.00 0.18 992 395.40 0.18 15.50 0.17 991 395.40 0.17 16.00 0.17 990 395.40 0.17 16.50 0.17 989 395.40 0.17 17.00 0.16 987 395.40 0.16 17.50 0.16 986 395.39 0.16 18.00 0.15 984 395.39 0.15 18.50 0.09 972 395.37 0.12 19.00 0.07 954 395.34 0.07 19.50 0.07 951 395.34 0.07 20.00 0.06 949 395.33 0.06 Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 116 Stage-Discharge for Pond 16P: Bioretention 2 Media Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) 393.75 0.00 395.83 0.82 397.91 1.99 393.79 0.00 395.87 0.86 397.95 2.01 393.83 0.00 395.91 0.89 397.99 2.03 393.87 0.00 395.95 0.93 398.03 2.04 393.91 0.00 395.99 0.96 398.07 2.06 393.95 0.00 396.03 1.00 398.11 2.07 393.99 0.00 396.07 1.03 398.15 2.09 394.03 0.00 396.11 1.06 398.19 2.10 394.07 0.00 396.15 1.09 398.23 2.12 394.11 0.00 396.19 1.12 398.27 2.13 394.15 0.00 396.23 1.14 398.31 2.15 394.19 0.00 396.27 1.17 398.35 2.16 394.23 0.00 396.31 1.20 398.39 2.18 394.27 0.00 396.35 1.22 398.43 2.19 394.31 0.00 396.39 1.25 398.47 2.21 394.35 0.00 396.43 1.28 398.51 2.22 394.39 0.00 396.47 1.30 398.55 2.23 394.43 0.00 396.51 1.32 398.59 2.25 394.47 0.00 396.55 1.35 398.63 2.26 394.51 0.00 396.59 1.37 398.67 2.28 394.55 0.00 396.63 1.39 398.71 2.29 394.59 0.00 396.67 1.42 398.75 2.30 394.63 0.00 396.71 1.44 398.79 2.32 394.67 0.00 396.75 1.46 398.83 2.33 394.71 0.00 396.79 1.48 398.87 2.35 394.75 0.00 396.83 1.50 398.91 2.36 394.79 0.00 396.87 1.52 398.95 2.37 394.83 0.00 396.91 1.55 398.99 2.39 394.87 0.00 396.95 1.57 394.91 0.00 396.99 1.59 394.95 0.00 397.03 1.61 394.99 0.00 397.07 1.63 395.03 0.00 397.11 1.65 395.07 0.00 397.15 1.66 395.11 0.00 397.19 1.68 395.15 0.00 397.23 1.70 395.19 0.00 397.27 1.72 395.23 0.00 397.31 1.74 395.27 0.01 397.35 1.76 395.31 0.04 397.39 1.78 395.35 0.09 397.43 1.79 395.39 0.15 397.47 1.81 395.43 0.23 397.51 1.83 395.47 0.31 397.55 1.85 395.51 0.40 397.59 1.86 395.55 0.48 397.63 1.88 395.59 0.54 397.67 1.90 395.63 0.60 397.71 1.91 395.67 0.65 397.75 1.93 395.71 0.69 397.79 1.95 395.75 0.74 397.83 1.96 395.79 0.78 397.87 1.98 Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 117 Stage-Area-Storage for Pond 16P: Bioretention 2 Media Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 393.75 1,500 0 398.95 1,500 2,400 393.85 1,500 60 393.95 1,500 120 394.05 1,500 180 394.15 1,500 240 394.25 1,500 300 394.35 1,500 360 394.45 1,500 420 394.55 1,500 480 394.65 1,500 540 394.75 1,500 600 394.85 1,500 660 394.95 1,500 720 395.05 1,500 780 395.15 1,500 840 395.25 1,500 900 395.35 1,500 960 395.45 1,500 1,020 395.55 1,500 1,080 395.65 1,500 1,140 395.75 1,500 1,200 395.85 1,500 1,238 395.95 1,500 1,275 396.05 1,500 1,313 396.15 1,500 1,350 396.25 1,500 1,388 396.35 1,500 1,425 396.45 1,500 1,462 396.55 1,500 1,500 396.65 1,500 1,537 396.75 1,500 1,575 396.85 1,500 1,613 396.95 1,500 1,650 397.05 1,500 1,688 397.15 1,500 1,725 397.25 1,500 1,763 397.35 1,500 1,800 397.45 1,500 1,837 397.55 1,500 1,875 397.65 1,500 1,912 397.75 1,500 1,950 397.85 1,500 1,988 397.95 1,500 2,025 398.05 1,500 2,063 398.15 1,500 2,100 398.25 1,500 2,138 398.35 1,500 2,175 398.45 1,500 2,212 398.55 1,500 2,250 398.65 1,500 2,287 398.75 1,500 2,325 398.85 1,500 2,363 Storm Calcs-update 2-12-2020 Type ll 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 sin 08663 ©2019 HydroCAD Software Solutions LLC Page 118 Summary for Pond 18P: Modified SWM Facility [44] Hint: Outlet device#2 is below defined storage Inflow Area = 4.200 ac, 55.24% Impervious, Inflow Depth > 3.49" for 10 YR event Inflow = 20.28 cfs @ 12.00 hrs, Volume= 1.221 af Outflow = 14.04 cfs @ 12.10 hrs, Volume= 1.207 af, Atten= 31%, Lag= 6.5 min Primary = 14.04 cfs @ 12.10 hrs, Volume= 1.207 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs/3 Peak Elev= 393.67'@ 12.10 hrs Surf.Area=4,119 sf Storage= 11,883 cf Plug-Flow detention time=25.9 min calculated for 1.207 af(99% of inflow) Center-of-Mass det. time=21.1 min ( 795.8-774.6 ) Volume Invert Avail.Storage Storage Description #1 390.05' 17,748 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 390.05 2,437 0 0 395.00 4,734 17,748 17,748 Device Routing Invert Outlet Devices #1 Primary 390.05' 24.0" Round Culvert L= 52.0' RCP, square edge headwall, Ke= 0.500 Inlet/Outlet Invert= 390.05'/389.75' S= 0.0058'I' Cc= 0.900 n= 0.011 Concrete pipe, straight&clean, Flow Area= 3.14 sf #2 Device 1 389.05' 7.0"W x 7.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 392.25' 24.0"W x 18.0" H Vert. Orifice/Grate C= 0.600 #4 Device 1 393.75' 24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=14.03 cfs @ 12.10 hrs HW=393.67' (Free Discharge) L11=Culvert (Passes 14.03 cfs of 24.50 cfs potential flow) -2=Orifice/Grate (Orifice Controls 3.12 cfs @ 9.17 fps) -3=Orifice/Grate (Orifice Controls 10.91 cfs @ 3.83 fps) -4=Orifice/Grate ( Controls 0.00 cfs) Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 119 Pond 18P: Modified SWM Facility Hydrograph 1 1 1 T 1 1 - - I ■Inflow 1 22-` -- ---, za.2saA) � � i 4 I I ,Primary 21 --Inflow Area=4!2OO ac 20= - 18 -Peak E1ev=393.-67' _ _ I I ;8= - 15 _Starage=11,88 cf _ " Iid.oa. 14 -- - ---------- - ---I I rr 13,- I I I 1 r 1 1 2. 121', _i_ L 1 J 1 L -1 -1 - 3 11 I / / i -1 I r T1 1 I r l 1 - I s 1 1 LL 1Qyi 1I I 1 F I 1 I 1 Or 1 1 1 1 I 6t, i 1 r T 1 1- 1 1 7_ I J L 1 J L 1 1 I I 1 6tT__y r--Y r 1 -1-- 5y' 1 1 I I 1 1 1 4s - 1 J 1 L 4 J 4-- 3-y 1 1 I r T 1 I r 1 I _ - y ,..' 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 18P: Modified SWM Facility Stage-Discharge 395 / D Primary` 394 r ����� �./� Orifice/Grate ... // r. ° Orifice/Grate o w 392 391 , Culvert / 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 120 Pond 18P: Modified SWM Facility Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 0 Surface ■Storage 395 / 394 1 393 c 0 2 392 ui 391- I, , , , 1 , , 1 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000. 18,000 Storage(cublc-feet) _ _ _ -0 (/) O CO (O CO CO J J O) C) ()1 Cn A A W CA) NN - - O O CD CO Co CO J J O) CS) Cn 01 A A ( W fJNJ -" --' O O C — O- () 0 OCTOC11OC11OCn6CT O 'in OCn6CTOCTOCTOCTO CII O CT O Cn O Cu O CT O (11 O (11 O C11 O 6O 3 O -a -, O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O.� CD 0 a) 3 D (7p O0- ) 0000000CD000 00 � -SCn7N •O- —I Cl) p 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C) -+. 0 -, C GJ (.1 CA.) 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N.) --' O O O O O O O O O O O E O o O. �' o O. y r n `~ g -n O_ d n N 0 a Ate) NJ --,, N Cv a) W II N 01 - O j O N O1 Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 122 Stage-Discharge for Pond 18P: Modified SWM Facility Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 390.05 0.00 392.65 4.27 390.10 0.01 392.70 4.61 390.15 0.05 392.75 4.96 390.20 0.12 392.80 5.34 390.25 0.21 392.85 5.73 390.30 0.33 392.90 6.13 390.35 0.48 392.95 6.55 390.40 0.65 393.00 6.98 390.45 0.83 393.05 7.43 390.50 1.04 393.10 7.89 390.55 1.16 393.15 8.37 390.60 1.22 393.20 8.85 390.65 1.27 393.25 9.35 390.70 1.32 393.30 9.86 390.75 1.37 393.35 10.38 390.80 1.42 393.40 10.92 390.85 1.47 393.45 11.46 390.90 1.51 393.50 12.02 390.95 1.55 393.55 12.58 391.00 1.60 393.60 13.16 391.05 1.64 393.65 13.74 391.10 1.68 393.70 14.34 391.15 1.72 393.75 14.95 391.20 1.76 393.80 15.78 391.25 1.79 393.85 16.81 391.30 1.83 393.90 17.97 391.35 1.87 393.95 19.23 391.40 1.90 394.00 20.59 391.45 1.94 394.05 22.02 391.50 1.97 394.10 23.54 391.55 2.01 394.15 25.13 391.60 2.04 394.20 26.78 391.65 2.07 394.25 27.06 391.70 2.10 394.30 27.27 391.75 2.14 394.35 27.48 391.80 2.17 394.40 27.69 391.85 2.20 394.45 27.89 391.90 2.23 394.50 28.10 391.95 2.26 394.55 28.30 392.00 2.29 394.60 28.50 392.05 2.32 394.65 28.70 392.10 2.35 394.70 28.90 392.15 2.37 394.75 29.10 392.20 2.40 394.80 29.29 392.25 2.43 394.85 29.49 392.30 2.53 394.90 29.68 392.35 2.69 394.95 29.87 392.40 2.88 395.00 30.06 392.45 3.11 392.50 3.37 392.55 3.65 392.60 3.95 Storm Calcs-update 2-12-2020 Type II 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 123 Stage-Area-Storage for Pond 18P: Modified SWM Facility Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 390.05 2,437 0 392.65 3,644 7,905 390.10 2,460 122 392.70 3,667 8,087 390.15 2,483 246 392.75 3,690 8,271 390.20 2,507 371 392.80 3,713 8,456 390.25 2,530 497 392.85 3,736 8,643 390.30 2,553 624 392.90 3,760 8,830 390.35 2,576 752 392.95 3,783 9,019 390.40 2,599 881 393.00 3,806 9,208 390.45 2,623 1,012 393.05 3,829 9,399 390.50 2,646 1,144 393.10 3,852 9,591 390.55 2,669 1,277 393.15 3,876 9,784 390.60 2,692 1,411 393.20 3,899 9,979 390.65 2,715 1,546 393.25 3,922 10,174 390.70 2,739 1,682 393.30 3,945 10,371 390.75 2,762 1,820 393.35 3,968 10,569 390.80 2,785 1,958 393.40 3,992 10,768 390.85 2,808 2,098 393.45 4,015 10,968 390.90 2,831 2,239 393.50 4,038 11,169 390.95 2,855 2,381 393.55 4,061 11,372 391.00 2,878 2,525 393.60 4,084 11,575 391.05 2,901 2,669 393.65 4,108 11,780 391.10 2,924 2,815 393.70 4,131 11,986 391.15 2,947 2,961 393.75 4,154 12,193 391.20 2,971 3,109 393.80 4,177 12,402 391.25 2,994 3,259 393.85 4,200 12,611 391.30 3,017 3,409 393.90 4,224 12,822 391.35 3,040 3,560 393.95 4,247 13,033 391.40 3,063 3,713 394.00 4,270 13,246 391.45 3,087 3,867 394.05 4,293 13,460 391.50 3,110 4,021 394.10 4,316 13,676 391.55 3,133 4,178 394.15 4,340 13,892 391.60 3,156 4,335 394.20 4,363 14,110 391.65 3,179 4,493 394.25 4,386 14,328 391.70 3,203 4,653 394.30 4,409 14,548 391.75 3,226 4,813 394.35 4,432 14,769 391.80 3,249 4,975 394.40 4,456 14,991 391.85 3,272 5,138 394.45 4,479 15,215 391.90 3,295 5,303 394.50 4,502 15,439 391.95 3,319 5,468 394.55 4,525 15,665 392.00 3,342 5,634 394.60 4,548 15,892 392.05 3,365 5,802 394.65 4,572 16,120 392.10 3,388 5,971 394.70 4,595 16,349 392.15 3,411 6,141 394.75 4,618 16,579 392.20 3,435 6,312 394.80 4,641 16,811 392.25 3,458 6,484 394.85 4,664 17,043 392.30 3,481 6,658 394.90 4,688 17,277 392.35 3,504 6,832 394.95 4,711 17,512 392.40 3,527 7,008 395.00 4,734 17,748 392.45 3,551 7,185 392.50 3,574 7,363 392.55 3,597 7,543 392.60 3,620 7,723 Storm Calcs-update 2-12-2020 Type 1124-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 124 Summary for Link 20L: Post Analysis Point 1 Inflow Area = 4.300 ac, 55.58% Impervious, Inflow Depth > 3.46" for 10 YR event Inflow = 14.52 cfs @ 12.10 hrs, Volume= 1.240 af Primary = 14.52 cfs @ 12.10 hrs, Volume= 1.240 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Link 20L: Post Analysis Point 1 Hydrograph 16 / ■Inflow 114.52 cfs I ■Primary 15= =Inflow /free=4.300 ac 114.52ds 14- 13 12= 11= 00 10= ' a- - 0 u. 5. 4= Jl 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type 11 24-hr 10 YR Rainfall=5.25" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 125 Hydrograph for Link 20L: Post Analysis Point 1 Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 10.40 0.47 0.00 0.47 0.20 0.00 0.00 0.00 10.60 0.53 0.00 0.53 0.40 0.00 0.00 0.00 10.80 0.58 0.00 0.58 0.60 0.00 0.00 0.00 11.00 0.64 0.00 0.64 0.80 0.00 0.00 0.00 11.20 0.72 0.00 0.72 1.00 0.00 0.00 0.00 11.40 0.83 0.00 0.83 1.20 0.00 0.00 0.00 11.60 1.00 0.00 1.00 1.40 0.00 0.00 0.00 11.80 1.69 0.00 1.69 1.60 0.00 0.00 0.00 12.00 9.22 0.00 9.22 1.80 0.00 0.00 0.00 12.20 12.63 0.00 12.63 2.00 0.00 0.00 0.00 12.40 6.74 0.00 6.74 2.20 0.00 0.00 0.00 12.60 3.94 0.00 3.94 2.40 0.00 0.00 0.00 12.80 2.75 0.00 2.75 2.60 0.00 0.00 0.00 13.00 2.42 0.00 2.42 2.80 0.00 0.00 0.00 13.20 2.30 0.00 2.30 3.00 0.00 0.00 0.00 13.40 2.16 0.00 2.16 3.20 0.00 0.00 0.00 13.60 2.02 0.00 2.02 3.40 0.00 0.00 0.00 13.80 1.86 0.00 1.86 3.60 0.00 0.00 0.00 14.00 1.70 0.00 1.70 3.80 0.00 0.00 0.00 14.20 1.53 0.00 1.53 4.00 0.00 0.00 0.00 14.40 1.37 0.00 1.37 4.20 0.00 0.00 0.00 14.60 1.22 0.00 1.22 4.40 0.00 0.00 0.00 14.80 1.00 0.00 1.00 4.60 0.00 0.00 0.00 15.00 0.80 0.00 0.80 4.80 0.00 0.00 0.00 15.20 0.73 0.00 0.73 5.00 0.01 0.00 0.01 15.40 0.69 0.00 0.69 5.20 0.01 0.00 0.01 15.60 0.66 0.00 0.66 5.40 0.01 0.00 0.01 15.80 0.63 0.00 0.63 5.60 0.01 0.00 0.01 16.00 0.61 0.00 0.61 5.80 0.01 0.00 0.01 16.20 0.58 0.00 0.58 6.00 0.02 0.00 0.02 16.40 0.56 0.00 0.56 6.20 0.03 0.00 0.03 16.60 0.55 0.00 0.55 6.40 0.03 0.00 0.03 16.80 0.54 0.00 0.54 6.60 0.04 0.00 0.04 17.00 0.53 0.00 0.53 6.80 0.04 0.00 0.04 17.20 0.52 0.00 0.52 7.00 0.05 0.00 0.05 17.40 0.51 0.00 0.51 7.20 0.06 0.00 0.06 17.60 0.50 0.00 0.50 7.40 0.07 0.00 0.07 17.80 0.49 0.00 0.49 7.60 0.08 0.00 0.08 18.00 0.48 0.00 0.48 7.80 0.09 0.00 0.09 18.20 0.47 0.00 0.47 8.00 0.10 0.00 0.10 18.40 0.46 0.00 0.46 8.20 0.10 0.00 0.10 18.60 0.43 0.00 0.43 8.40 0.12 0.00 0.12 18.80 0.40 0.00 0.40 8.60 0.13 0.00 0.13 19.00 0.38 0.00 0.38 8.80 0.15 0.00 0.15 19.20 0.36 0.00 0.36 9.00 0.17 0.00 0.17 19.40 0.35 0.00 0.35 9.20 0.19 0.00 0.19 19.60 0.34 0.00 0.34 9.40 0.21 0.00 0.21 19.80 0.33 0.00 0.33 9.60 0.24 0.00 0.24 20.00 0.32 0.00 0.32 9.80 0.29 0.00 0.29 10.00 0.35 0.00 0.35 10.20 0.41 0.00 0.41 Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 126 Time span=0.00-20.00 hrs, dt=0.01 hrs, 2001 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchmentl l S: Bioretention 1 Area Runoff Area=1.340 ac 23.88% Impervious Runoff Depth>5.81" Tc=5.0 min CN=80 Runoff=14.64 cfs 0.649 af Subcatchment14S: Bioretention 2 Area Runoff Area=0.880 ac 76.14% Impervious Runoff Depth>7.24" Tc=5.0 min CN=92 Runoff=10.90 cfs 0.531 af Subcatchment17S: Remaining Post SWM Runoff Area=1.980 ac 67.17% Impervious Runoff Depth>6.98" Flow Length=400' Tc=17.6 min CN=90 Runoff=16.33 cfs 1.151 af Subcatchment19S: Post Unrouted Area Runoff Area=0.100 ac 70.00% Impervious Runoff Depth>7.10" Flow Length=400' Tc=17.6 min CN=91 Runoff=0.83 cfs 0.059 af Pond 12P: Bioretention1 Ponding Peak EIev=401.72' Storage=1,856 cf Inflow=14.64 cfs 0.649 af Primary=13.71 cfs 0.515 af Secondary=0.14 cfs 0.116 af Outflow=13.85 cfs 0.631 af Pond 13P: Bioretention 1 Media Peak EIev=396.18' Storage=5 cf Inflow=0.14 cfs 0.116 af Outflow=0.14 cfs 0.116 of Pond 15P: Bioretention 2 Ponding Peak EIev=400.45' Storage=3,020 cf Inflow=10.90 cfs 0.531 af Primary=8.28 cfs 0.320 af Secondary=0.24 cfs 0.203 af Outflow=8.52 cfs 0.522 af Pond 16P: Bioretention2 Media Peak Elev=395.43' Storage=1,008 cf Inflow=0.24 cfs 0.203 af Outflow=0.23 cfs 0.180 af Pond 18P: Modified SWM Facility Peak EIev=394.65' Storage=16.132 cf Inflow=35.48 cfs 2.282 af Outflow=28.71 cfs 2.264 af Link 20L: Post Analysis Point 1 Inflow=29.54 cfs 2.323 af Primary=29.54 cfs 2.323 af Total Runoff Area = 4.300 ac Runoff Volume = 2.390 af Average Runoff Depth = 6.67" 44.42% Pervious = 1.910 ac 55.58% Impervious = 2.390 ac Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 127 Summary for Subcatchment 11S: Bioretention 1 Area Runoff = 14.64 cfs @ 11.96 hrs, Volume= 0.649 af, Depth> 5.81" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 100 YR Rainfall=8.62" Area (ac) CN Description 0.320 98 Paved parking, HSG C 1.000 74 >75% Grass cover, Good, HSG C 0.020 77 Woods, Poor, HSG C 1.340 80 Weighted Average 1.020 76.12% Pervious Area 0.320 23.88% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 11S: Bioretention 1 Area Hydrograph 16: J Runoff` 15 `14.64 cfs i 14- TYPO11'24-hr 13= 100_YR Rainfall=8.62" 1211. Runoff Area=1.340 ac 10- Runoff Volume=0.649 of - Runoff Depth>5.81" - . - g IT 72 Tc=5.0 min CN=80 5= 3- f 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) N O M (O N N O N- 00 N 4) II CD • IF r No OLID 0) 0) M ' O) LU NOO) N (D O CD 0) 1-- (O LU M N O 0) N (D LU V V' MMN .,- .- 000) 0) U U N N (o CO Lo �_ O .� MM �i V COI- LOC) N co co 0) co CD CD LO LID � C) M M M M M CO N N CNN N N N N N N N NN a+ O O O O O O 1f) N O O O O O O O O O O O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 O C O ` fa. am+ !Y F>' J 2 J O N O m . oIn mr- W o Mor- «) f- 00f- u) MOCDNI- NOOMI- N (DO N t00 L000 I- oNLf) m OMLf) I� ON M '' V Nf Lf) Lf) (DI-- Q100Lf) U0N- NM V- L0CDI� f- 00aOMM00 'H ,- NNNMMMNf- V ct LDLOLf) (D (DCD (OI- I� N- NMW D (I) U L O O O O O O 0 - C') M V- V- V 'V V' ' Lf) Lf) L() LO Lf) LO LC) LO LO Lf) (f) Lf) LO LO LO L0 Ln Ln L() Lf) Lf) LU LO LO if) 1.0 O - X O U) r. 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Ui 0101 A A CA.) CA A (. .) CO C.) C.) N N N) N IN 0000 CD c � C1 (D O N 0 Co 6) A N 0 Oo 6) A N 0 Ca 6) A N Co Co 6 A N CD Co D) A N 0 CO 6) A N 0 Co 0 A N CD Co 6 .A N 0 OO Q) A N 0 Co 6) A IN 0 3 O -0 O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (D n a) 3 0 Q. _ -- ) ® CS a) . . . . . -' . --� co0 co0 co0 0 co0 0 0 0 0 0 0 0 0 0 0 0 0 0 CD 0 0 0 CD 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D n -s s< 6) CT A A 0) W .N) m -- OOOCD (D OO CO CO -1 v v a) a) 0) 6) UIUi (.n A A A A W co 0) CJ (.) N) N N N) 000000 En O (.) a) (D CO CO N �1 a) N �I CO O 6) IN (D (TN) CD 01 N (D 6) C.) 0 -1 A N) CO 6) A - CD v A N) CD co CT C.7 CO v Cr Cs) --s CO - (T A N C) . b --I N 5' m n) 13 x cn O 000000000CD0000CD000000000000CD0000CD000000000000000CD00 � ° 0 Cl. (D Co Co v 1-4 C) Co (T (T A A A A C.) C.) W W N N NN 000000000000000000000000 N N = ? N ei- D --s CT CDCT, 0 al -s --A .) 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CD (T - 6) - 6) OAcoma) 000 -» 0 -I NJ CO CC) A C.) (T (D 0) 06) co.� co CO 07 O a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 CD 0 0 0 0 0 -s to ,p -, 0 0 0 0 0 0 n D - CD . -. N N N N NJ N N) N) N (.) (.) C.) A A CT 6) CO (...) p i Ca ..1 01 A A Ca (w) '' O OO - - N) N N W C.) W A A (TCT CT 6) 6) a) �1 - CO CO 0 - N W A (T6) �ICON) CT CO C.) CO --1 6) 61 CO N co A N) CO -I -, a) N 0 N N D CD o °1 0 av Cu • co 7j- N Op (D O (.) N 0 0 o N Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 131 Summary for Subcatchment 17S: Remaining Post SWM Facility Drainage Area Runoff = 16.33 cfs @ 12.09 hrs, Volume= 1.151 af, Depth> 6.98" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 100 YR Rainfall=8.62" Area (ac) CN Description 1.330 98 Paved parking, HSG C 0.650 74 >75% Grass cover, Good, HSG C 0.000 66 Woods, Poor, HSG B 1.980 90 Weighted Average 0.650 32.83% Pervious Area 1.330 67.17% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 0.3 200 0.0200 9.68 11.88 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.010 PVC, smooth interior 17.6 400 Total Subcatchment 17S: Remaining Post SWM Facility Drainage Area Hydrograph 18 ❑Runoff` 17: r16.33 cfs 161 Type 1124-h r 14_. 100 YR Rainfall=8.62" 13= RunoffArea=1.980 ac 127. Runoff Volume=1.151 of .1101 - -Runoff Depth>6.98"--- ° 9 LT! Flow Length=400' 8- . 774 _ Tc=17.6 min CN=90 00 3= '' Ae 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 132 Hydrograph for Subcatchment 17S: Remaining Post SWM Facility Drainage Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 1.71 0.86 0.60 0.20 0.02 0.00 0.00 10.60 1.81 0.93 0.67 0.40 0.04 0.00 0.00 10.80 1.91 1.02 0.76 0.60 0.05 0.00 0.00 11.00 2.03 1.12 0.88 0.80 0.07 0.00 0.00 11.20 2.17 1.24 1.03 1.00 0.09 0.00 0.00 11.40 2.34 1.39 1.27 1.20 0.11 0.00 0.00 11.60 2.64 1.66 1.60 1.40 0.13 0.00 0.00 11.80 3.71 2.65 4.27 1.60 0.15 0.00 0.00 12.00 5.72 4.57 13.12 1.80 0.17 0.00 0.00 12.20 6.02 4.87 12.17 2.00 0.19 0.00 0.00 12.40 6.25 5.09 4.56 2.20 0.21 0.00 0.00 12.60 6.41 5.24 2.44 2.40 0.23 0.00 0.00 12.80 6.54 5.37 1.60 2.60 0.25 0.00 0.00 13.00 6.65 5.48 1.28 2.80 0.28 0.00 0.01 13.20 6.75 5.58 1.10 3.00 0.30 0.00 0.02 13.40 6.85 5.67 0.97 3.20 0.32 0.01 0.02 13.60 6.93 5.75 0.87 3.40 0.34 0.01 0.03 13.80 7.00 5.82 0.79 3.60 0.37 0.02 0.04 14.00 7.07 5.89 0.72 3.80 0.39 0.02 0.05 14.20 7.13 5.95 0.65 4.00 0.41 0.03 0.06 14.40 7.19 6.01 0.61 4.20 0.44 0.04 0.06 14.60 7.25 6.07 0.59 4.40 0.46 0.04 0.07 14.80 7.30 6.12 0.56 4.60 0.49 0.05 0.08 15.00 7.36 6.17 0.54 4.80 0.52 0.06 0.09 15.20 7.41 6.22 0.52 5.00 0.54 0.07 0.10 15.40 7.46 6.27 0.49 5.20 0.57 0.08 0.11 15.60 7.50 6.32 0.47 5.40 0.60 0.10 0.12 15.80 7.54 6.36 0.44 5.60 0.63 0.11 0.12 16.00 7.59 6.40 0.42 5.80 0.66 0.12 0.13 16.20 7.62 6.44 0.40 6.00 0.69 0.14 0.14 16.40 7.66 6.47 0.38 6.20 0.72 0.15 0.15 16.60 7.70 6.51 0.38 6.40 0.75 0.17 0.16 16.80 7.74 6.55 0.37 6.60 0.79 0.19 0.17 17.00 7.77 6.58 0.36 6.80 0.82 0.21 0.18 17.20 7.81 6.62 0.35 7.00 0.85 0.23 0.19 17.40 7.84 6.65 0.34 7.20 0.89 0.25 0.20 17.60 7.88 6.68 0.33 7.40 0.92 0.27 0.21 17.80 7.91 6.71 0.32 7.60 0.96 0.29 0.22 18.00 7.94 6.75 0.32 7.80 1.00 0.32 0.23 18.20 7.97 6.78 0.31 8.00 1.03 0.34 0.24 18.40 8.00 6.80 0.30 8.20 1.07 0.37 0.25 18.60 8.03 6.83 0.29 8.40 1.12 0.40 0.27 18.80 8.06 6.86 0.28 8.60 1.16 0.43 0.30 19.00 8.08 6.89 0.27 8.80 1.21 0.47 0.33 19.20 8.11 6.91 0.27 9.00 1.27 0.51 0.36 19.40 8.14 6.94 0.26 9.20 1.32 0.55 0.39 19.60 8.16 6.96 0.25 9.40 1.38 0.59 0.41 19.80 8.18 6.99 0.24 9.60 1.43 0.63 0.42 20.00 8.21 7.01 0.23 9.80 1.49 0.68 0.44 10.00 1.56 0.73 0.48 10.20 1.63 0.79 0.53 Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 133 Summary for Subcatchment 19S: Post Unrouted Area Runoff = 0.83 cfs @ 12.09 hrs, Volume= 0.059 af, Depth> 7.10" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Type II 24-hr 100 YR Rainfall=8.62" Area (ac) CN Description 0.070 98 Paved parking, HSG C 0.030 74 >75% Grass cover, Good, HSG C 0.000 66 Woods, Poor, HSG B 0.100 91 Weighted Average 0.030 30.00% Pervious Area 0.070 70.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 17.3 200 0.0450 0.19 Sheet Flow, Grass: Dense n= 0.240 P2= 3.47" 0.3 200 0.0200 9.68 11.88 Pipe Channel, 15.0" Round Area= 1.2 sf Perim= 3.9' r= 0.31' n= 0.010 PVC, smooth interior 17.6 400 Total Subcatchment 19S: Post Unrouted Area Hydrograph 0.9 --,- --. ❑Runoff` 0.85 l 0.83 cfs 0.8- Typo 11'24-h r i 0J5 -100 YR Rainfali=6.62" 0.7 0.65 Runoff Area=0.100 ac 0.6 0.55 Runoff Volume=0.059 af °.5 Runoff-Depth>7.10" °D4- Flow Length=400' "5- -Tt=-17.6 min 0.3 Jr(( 0.25 VIr=91 0.2 0.15 0.1 0.05 �. 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 134 Hydrograph for Subcatchment 19S: Post Unrouted Area Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 10.40 1.71 0.92 0.03 0.20 0.02 0.00 0.00 10.60 1.81 0.99 0.03 0.40 0.04 0.00 0.00 10.80 1.91 1.08 0.04 0.60 0.05 0.00 0.00 11.00 2.03 1.19 0.05 0.80 0.07 0.00 0.00 11.20 2.17 1.31 0.05 1.00 0.09 0.00 0.00 11.40 2.34 1.47 0.07 1.20 0.11 0.00 0.00 11.60 2.64 1.74 0.08 1.40 0.13 0.00 0.00 11.80 3.71 2.74 0.22 1.60 0.15 0.00 0.00 12.00 5.72 4.68 0.67 1.80 0.17 0.00 0.00 12.20 6.02 4.98 0.62 2.00 0.19 0.00 0.00 12.40 6.25 5.20 0.23 2.20 0.21 0.00 0.00 12.60 6.41 5.36 0.12 2.40 0.23 0.00 0.00 12.80 6.54 5.49 0.08 2.60 0.25 0.00 0.00 13.00 6.65 5.60 0.07 2.80 0.28 0.01 0.00 13.20 6.75 5.70 0.06 3.00 0.30 0.01 0.00 13.40 6.85 5.79 0.05 3.20 0.32 0.01 0.00 13.60 6.93 5.87 0.04 3.40 0.34 0.02 0.00 13.80 7.00 5.94 0.04 3.60 0.37 0.02 0.00 14.00 7.07 6.01 0.04 3.80 0.39 0.03 0.00 14.20 7.13 6.07 0.03 4.00 0.41 0.04 0.00 14.40 7.19 6.13 0.03 4.20 0.44 0.05 0.00 14.60 7.25 6.18 0.03 4.40 0.46 0.06 0.00 14.80 7.30 6.24 0.03 4.60 0.49 0.07 0.00 15.00 7.36 6.29 0.03 4.80 0.52 0.08 0.01 15.20 7.41 6.34 0.03 5.00 0.54 0.09 0.01 15.40 7.46 6.39 0.02 5.20 0.57 0.10 0.01 15.60 7.50 6.43 0.02 5.40 0.60 0.12 0.01 15.80 7.54 6.48 0.02 5.60 0.63 0.13 0.01 16.00 7.59 6.52 0.02 5.80 0.66 0.15 0.01 16.20 7.62 6.55 0.02 6.00 0.69 0.16 0.01 16.40 7.66 6.59 0.02 6.20 0.72 0.18 0.01 16.60 7.70 6.63 0.02 6.40 0.75 0.20 0.01 16.80 7.74 6.67 0.02 6.60 0.79 0.22 0.01 17.00 7.77 6.70 0.02 6.80 0.82 0.24 0.01 17.20 7.81 6.73 0.02 7.00 0.85 0.26 0.01 17.40 7.84 6.77 0.02 7.20 0.89 0.28 0.01 17.60 7.88 6.80 0.02 7.40 0.92 0.31 0.01 17.80 7.91 6.83 0.02 7.60 0.96 0.33 0.01 18.00 7.94 6.86 0.02 7.80 1.00 0.36 0.01 18.20 7.97 6.89 0.02 8.00 1.03 0.38 0.01 18.40 8.00 6.92 0.02 8.20 1.07 0.41 0.01 18.60 8.03 6.95 0.01 8.40 1.12 0.44 0.01 18.80 8.06 6.98 0.01 8.60 1.16 0.48 0.02 19.00 8.08 7.01 0.01 8.80 1.21 0.51 0.02 19.20 8.11 7.03 0.01 9.00 1.27 0.56 0.02 19.40 8.14 7.06 0.01 9.20 1.32 0.60 0.02 19.60 8.16 7.08 0.01 9.40 1.38 0.64 0.02 19.80 8.18 7.11 0.01 9.60 1.43 0.69 0.02 20.00 8.21 7.13 0.01 9.80 1.49 0.74 0.02 10.00 1.56 0.79 0.03 10.20 1.63 0.85 0.03 Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 135 Summary for Pond 12P: Bioretention 1 Ponding Inflow Area= 1.340 ac, 23.88% Impervious, Inflow Depth > 5.81" for 100 YR event Inflow = 14.64 cfs @ 11.96 hrs, Volume= 0.649 af Outflow = 13.85 cfs @ 11.98 hrs, Volume= 0.631 af, Atten= 5%, Lag= 1.4 min Primary = 13.71 cfs @ 11.98 hrs, Volume= 0.515 af Secondary= 0.14 cfs @ 11.98 hrs, Volume= 0.116 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev=401.72'@ 11.98 hrs Surf.Area= 1,522 sf Storage= 1,856 cf Plug-Flow detention time= 17.6 min calculated for 0.631 af(97% of inflow) Center-of-Mass det. time=6.5 min ( 766.8 - 760.3 ) Volume Invert Avail.Storage Storage Description #1 400.17' 2,580 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 400.17 870 0 0 402.17 1,710 2,580 2,580 Device Routing Invert Outlet Devices #1 Secondary 400.17' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 1.00' #2 Primary 400.90' 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=13.71 cfs @ 11.98 hrs HW=401.72' (Free Discharge) L2=Orifice/Grate (Orifice Controls 13.71 cfs @ 4.36 fps) Secondary OutFlow Max=0.14 cfs @ 11.98 hrs HW=401.72' (Free Discharge) 1=Exfiltration ( Controls 0.14 cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 136 Pond 12P: Bioretention 1 Ponding Hydrograph ■Inflow 114.64cfs I Outflow mary 16; crs Inflow Area=1.340 ac 185 °Se ondary 152:. Peak EIev=401.72' 1137 Os 14 13 Storage=1 ,856 cf I t 9= 3 a011 o u. 7- 6 100/ 4 5 3 2 ////////////////////////////////.///1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 12P: Bioretention 1 Ponding Stage-Discharge / ©Total ■Primary ■Secondary 402- Air . c 0 V e 401 W ExfiltraiO 0 2 4 6 8 10 12 14 16 Discharge (cis) Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 137 Pond 12P: Bioretention 1 Ponding Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,700 Surface ❑Storage 402 a, a, 0 u 401 w Guatom Stage Date / 0 200 400 600 800 1,000 1,200 1.400 1,600 1,800 2,000 2,200 2,400 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Paste 138 Hydrograph for Pond 12P: Bioretention 1 Ponding Time Inflow Storage Elevation Outflow Primary Secondary (hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0 400.17 0.00 0.00 0.00 0.50 0.00 0 400.17 0.00 0.00 0.00 1.00 0.00 0 400.17 0.00 0.00 0.00 1.50 0.00 0 400.17 0.00 0.00 0.00 2.00 0.00 0 400.17 0.00 0.00 0.00 2.50 0.00 0 400.17 0.00 0.00 0.00 3.00 0.00 0 400.17 0.00 0.00 0.00 3.50 0.00 0 400.17 0.00 0.00 0.00 4.00 0.00 0 400.17 0.00 0.00 0.00 4.50 0.00 0 400.17 0.00 0.00 0.00 5.00 0.00 1 400.17 0.00 0.00 0.00 5.50 0.02 3 400.17 0.01 0.00 0.01 6.00 0.03 5 400.18 0.03 0.00 0.03 6.50 0.04 8 400.18 0.04 0.00 0.04 7.00 0.05 11 400.18 0.05 0.00 0.05 7.50 0.07 14 400.19 0.06 0.00 0.06 8.00 0.08 17 400.19 0.08 0.00 0.08 8.50 0.11 39 400.21 0.08 0.00 0.08 9.00 0.15 119 400.30 0.09 0.00 0.09 9.50 0.17 248 400.44 0.09 0.00 0.09 10.00 0.23 428 400.61 0.10 0.00 0.10 10.50 0.32 729 400.88 0.11 0.00 0.11 11.00 0.49 827 400.97 0.47 0.36 0.11 11.50 0.88 877 401.01 0.85 0.74 0.11 12.00 12.29 1,813 401.69 13.61 13.47 0.14 12.50 1.11 914 401.04 1.18 1.06 0.11 13.00 0.69 860 400.99 0.71 0.60 0.11 13.50 0.53 837 400.98 0.54 0.43 0.11 14.00 0.41 820 400.96 0.42 0.31 0.11 14.50 0.37 811 400.95 0.37 0.26 0.11 15.00 0.33 805 400.95 0.33 0.22 0.11 15.50 0.29 798 400.94 0.30 0.19 0.11 16.00 0.26 791 400.94 0.26 0.15 0.11 16.50 0.24 787 400.93 0.24 0.13 0.11 17.00 0.23 784 400.93 0.23 0.12 0.11 17.50 0.21 782 400.93 0.21 0.10 0.11 18.00 0.20 778 400.93 0.20 0.09 0.11 18.50 0.18 774 400.92 0.19 0.08 0.11 19.00 0.17 771 400.92 0.17 0.06 0.11 19.50 0.16 767 400.92 0.16 0.05 0.11 20.00 0.14 763 400.91 0.15 0.04 0.11 N O 0) (O N M 0 r- O0 N N H M (0 N M C_ N��y Q) �N NNNNNMMMMMMMMMMMMM V V V V V V V V V V V LI) (D (D (DCD (DCD CC .0 - a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 M O O aa)) O Q) u) O L. '0 p+�LU 0) LI) N O 0) 0) O NLI) CO M (Y) V 0) (- r- r- OOO) 7- 0 N- V CO LIT- I- MO) V OLOOLO CO N (DO V COS ", L = '- U LI) 0O N CDOM N N COO V 0) M CO IM (- N N N N N 00 - N V CO (- 0) .- N V LI) N 0) O NM LI) CD (- 0) O N M LU (D N 0) O 4 0 E ....MM V V LI) LI) LI) CDCDN- NN00000) 0) OO � '- NNMMC") (`') MCO V V V V V V LI) LnLI) tI) LI) Lt) LI) (D (D (D (D (O (D (OF CD c P. J O a) N- N O LUMN NM LOMx- W N- V N 0 0 00 LU NO LC I- M O LOO LO O L) O V 0M0NDON I_ JCON(DOMI-- ,- U) OM (� 7- DOLIDV6VQV0VONVLnLOONVL) (- 00NmLI (D06OVMLO 0O - N cn 0 co U.M V V V LI) LI) LI) CO CD N N 0O M 000) 0 O O 7 , N N CO CO Co Co M Ni V V V V V Ln Ili LI) LI) LI LI) LO CD (fl CD (D (D (D CD (- � o L V) D _0 p (0 m 4) - C ^,- MLUN 0) ,- CO LUNM MLON0) � M LON0) ,- ML N- 0) CLON0) ,- MLON0) ,- M LI) N0) M Ln (` LON O. O a (NNNNNco C co (MM V V V V V LI) LI) Lf) t1) LI) 0 (DCD (D (ON- N N N ti00 00 00 00 00 0) 0) a, 0) 0) 00000 .- (0 N � 41 N N N N N N N N N - ] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .0 0 V V V V V V V V V V V V V V V V V V V V V V V V V V V V . V V V V V V V V V V V V V (n = W 0 O < a U 6. 000 0)00) 00 0) 0) 0)00) 0) 0000000000000 � � � � � r- . . . . . . . NNNNNNN 2M '-- 00000000000 0 0 0 0 0 0 0 0 0 0 O 0 O 0 0 0 0 0 0 'D 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I O 0) CIfa a) O N V N Qu N ,N OO OO O O O O O O O O O O OO O OO O O O O O O O O CD 0 CD 0000000N - M (n LC) LC) CO 0') V CDCO (- N CO L Cl Q O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O ,- N M L O N M .- V N O N L O W N N co L E E O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - - - - N N N M O 4) � O (0 ,7 L N• 00 a N M Cu, -0 0C � a) N c-- 000 ) 0000MOOO) 0) OOOOCn0) 0) 0) 0) 000O OOOOO OOO Oc- MNV 0) N (fl CO (DN0) C0) OM MEN N Q) 0000000000000000000 � � � � � � �- . . . . . . . . . , . NM V (DMOMLI) OOOMCDOM M C O (p .0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ) C _c OH o ✓ >s,- 0 ms -0 0 U -00 C ^N- O) MLI) (- O) - C LI) N- 0) o LI) I- O) , M L() NO ML N- 0) ,- M LI) N0) r- C LI) N0) CLn N O) ,- oL N- 0) - MLn N O) 2 ‹ O a - - NNNNNMMMMM V V V V V L(7L1) Lnlf) Lt) (D (D (DCD (DI0000 ( 000O) 00) 0) 0) 00000 - Emu . a) O O O O O O O O O O O O O O O O O O O O O O O O O O 0 0 0 06 0 0 0 0 0 0 0 0 0 0 0 L Q O > "O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O 0 0 0 0 0 Ow -0 0 VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV 4 L W Nd 1 Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 140 Stage-Area-Storage for Pond 12P: Bioretention 1 Ponding Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 400.17 870 0 401.21 1.307 1,132 400.19 878 17 401.23 1,315 1,158 400.21 887 35 401.25 1,324 1,185 400.23 895 53 401.27 1,332 1,211 400.25 904 71 401.29 1,340 1,238 400.27 912 89 401.31 1,349 1,265 400.29 920 107 401.33 1,357 1,292 400.31 929 126 401.35 1,366 1,319 400.33 937 145 401.37 1,374 1,346 400.35 946 163 401.39 1,382 1,374 400.37 954 182 401.41 1,391 1,402 400.39 962 202 401.43 1,399 1,430 400.41 971 221 401.45 1,408 1,458 400.43 979 240 401.47 1,416 1,486 400.45 988 260 401.49 1,424 1,514 400.47 996 280 401.51 1,433 1,543 400.49 1,004 300 401.53 1,441 1,572 400.51 1,013 320 401.55 1,450 1,601 400.53 1,021 340 401.57 1,458 1,630 400.55 1,030 361 401.59 1,466 1,659 400.57 1,038 382 401.61 1,475 1,688 400.59 1,046 402 401.63 1,483 1,718 400.61 1,055 423 401.65 1,492 1,748 400.63 1,063 445 401.67 1,500 1,778 400.65 1,072 466 401.69 1,508 1,808 400.67 1,080 488 401.71 1,517 1,838 400.69 1,088 509 401.73 1,525 1,868 400.71 1,097 531 401.75 1,534 1,899 400.73 1,105 553 401.77 1,542 1,930 400.75 1,114 575 401.79 1,550 1,961 400.77 1,122 598 401.81 1,559 1,992 400.79 1,130 620 401.83 1,567 2,023 400.81 1,139 643 401.85 1,576 2,054 400.83 1,147 666 401.87 1,584 2,086 400.85 1,156 689 401.89 1,592 2,118 400.87 1,164 712 401.91 1,601 2,150 400.89 1,172 735 401.93 1,609 2,182 400.91 1,181 759 401.95 1,618 2,214 400.93 1,189 782 401.97 1.626 2,246 400.95 1,198 806 401.99 1,634 2,279 400.97 1,206 830 402.01 1.643 2,312 400.99 1,214 855 402.03 1,651 2,345 401.01 1,223 879 402.05 1,660 2,378 401.03 1,231 904 402.07 1,668 2,411 401.05 1,240 928 402.09 1,676 2,445 401.07 1,248 953 402.11 1,685 2,478 401.09 1,256 978 402.13 1,693 2,512 401.11 1,265 1,003 402.15 1,702 2,546 401.13 1,273 1,029 402.17 1,710 2,580 401.15 1,282 1,054 401.17 1,290 1,080 401.19 1,298 1,106 Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 141 Summary for Pond 13P: Bioretention 1 Media [44] Hint: Outlet device#1 is below defined storage Inflow = 0.14 cfs @ 11.98 hrs, Volume= 0.116 of Outflow = 0.14 cfs @ 11.99 hrs, Volume= 0.116 af, Atten= 0%, Lag= 0.5 min Primary = 0.14 cfs © 11.99 hrs, Volume= 0.116 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 396.18' @ 11.99 hrs Surf.Area= 870 sf Storage= 5 cf Plug-Flow detention time=0.6 min calculated for 0.116 of(100% of inflow) Center-of-Mass det. time= 0.3 min ( 815.1 - 814.8 ) Volume Invert Avail.Storage Storage Description #1 396.17' 1,131 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 396.17 870 0.0 0 0 398.17 870 40.0 696 696 400.17 870 25.0 435 1,131 Device Routing Invert Outlet Devices #1 Primary 395.24' 4.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=0.37 cfs @ 11.99 hrs HW=396.18' (Free Discharge) L1=Orifice/Grate (Orifice Controls 0.37 cfs @ 4.25 fps) Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 142 Pond 13P: Bioretention 1 Media Hydrograph / ■Inflow o.0 ors ■Primary 015 Peak Elev=396.18' 014 cfs 0.12 Storage=5 cf 0.11 0.1 0.09= 0.08- LL 0.07 0.06- 0.05- 0.04- 0.03- 0.02 0.01= 0" 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 13P: Bioretention 1 Media Stage-Discharge 400 / �■Primary` 399- c 0 398- w 397- 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 0.7'5 0.8 0.85 0.9 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 143 Pond 13P: Bioretention 1 Media Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 Surface i ❑Storage 400 399 w / c j 398 397 Custom Stage Data --- 0 100 200 300 400 500 600 700 800 900 1,000 1,100 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 sin 08663 ©2019 HydroCAD Software Solutions LLC Page 144 Hydrograph for Pond 13P: Bioretention 1 Media Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 396.17 0.00 0.50 0.00 0 396.17 0.00 1.00 0.00 0 396.17 0.00 1.50 0.00 0 396.17 0.00 2.00 0.00 0 396.17 0.00 2.50 0.00 0 396.17 0.00 3.00 0.00 0 396.17 0.00 3.50 0.00 0 396.17 0.00 4.00 0.00 0 396.17 0.00 4.50 0.00 0 396.17 0.00 5.00 0.00 0 396.17 0.00 5.50 0.01 1 396.17 0.01 6.00 0.03 1 396.17 0.03 6.50 0.04 1 396.17 0.04 7.00 0.05 2 396.18 0.05 7.50 0.06 2 396.18 0.06 8.00 0.08 3 396.18 0.08 8.50 0.08 3 396.18 0.08 9.00 0.09 3 396.18 0.09 9.50 0.09 3 396.18 0.09 10.00 0.10 4 396.18 0.10 10.50 0.11 4 396.18 0.11 11.00 0.11 4 396.18 0.11 11.50 0.11 4 396.18 0.11 12.00 0.14 5 396.18 0.14 12.50 0.11 4 396.18 0.11 13.00 0.11 4 396.18 0.11 13.50 0.11 4 396.18 0.11 14.00 0.11 4 396.18 0.11 14.50 0.11 4 396.18 0.11 15.00 0.11 4 396.18 0.11 15.50 0.11 4 396.18 0.11 16.00 0.11 4 396.18 0.11 16.50 0.11 4 396.18 0.11 17.00 0.11 4 396.18 0.11 17.50 0.11 4 396.18 0.11 18.00 0.11 4 396.18 0.11 18.50 0.11 4 396.18 0.11 19.00 0.11 4 396.18 0.11 19.50 0.11 4 396.18 0.11 20.00 0.11 4 396.18 0.11 Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 145 Stage-Discharge for Pond 13P: Bioretention 1 Media Elevation Primary Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) (feet) (cfs) 396.17 0.00 397.21 0.56 398.25 0.71 399.29 0.83 396.19 0.37 397.23 0.57 398.27 0.71 399.31 0.83 396.21 0.38 397.25 0.57 398.29 0.71 399.33 0.83 396.23 0.38 397.27 0.57 398.31 0.72 399.35 0.83 396.25 0.39 397.29 0.58 398.33 0.72 399.37 0.84 396.27 0.39 397.31 0.58 398.35 0.72 399.39 0.84 396.29 0.39 397.33 0.58 398.37 0.72 399.41 0.84 396.31 0.40 397.35 0.59 398.39 0.73 399.43 0.84 396.33 0.40 397.37 0.59 398.41 0.73 399.45 0.84 396.35 0.41 397.39 0.59 398.43 0.73 399.47 0.85 396.37 0.41 397.41 0.59 398.45 0.73 399.49 0.85 396.39 0.42 397.43 0.60 398.47 0.74 399.51 0.85 396.41 0.42 397.45 0.60 398.49 0.74 399.53 0.85 396.43 0.43 397.47 0.60 398.51 0.74 399.55 0.86 396.45 0.43 397.49 0.61 398.53 0.74 399.57 0.86 396.47 0.43 397.51 0.61 398.55 0.74 399.59 0.86 396.49 0.44 397.53 0.61 398.57 0.75 399.61 0.86 396.51 0.44 397.55 0.62 398.59 0.75 399.63 0.86 396.53 0.45 397.57 0.62 398.61 0.75 399.65 0.87 396.55 0.45 397.59 0.62 398.63 0.75 399.67 0.87 396.57 0.45 397.61 0.62 398.65 0.76 399.69 0.87 396.59 0.46 397.63 0.63 398.67 0.76 399.71 0.87 396.61 0.46 397.65 0.63 398.69 0.76 399.73 0.87 396.63 0.46 397.67 0.63 398.71 0.76 399.75 0.88 396.65 0.47 397.69 0.63 398.73 0.77 399.77 0.88 396.67 0.47 397.71 0.64 398.75 0.77 399.79 0.88 396.69 0.48 397.73 0.64 398.77 0.77 399.81 0.88 396.71 0.48 397.75 0.64 398.79 0.77 399.83 0.88 396.73 0.48 397.77 0.65 398.81 0.78 399.85 0.89 396.75 0.49 397.79 0.65 398.83 0.78 399.87 0.89 396.77 0.49 397.81 0.65 398.85 0.78 399.89 0.89 396.79 0.49 397.83 0.65 398.87 0.78 399.91 0.89 396.81 0.50 397.85 0.66 398.89 0.78 399.93 0.89 396.83 0.50 397.87 0.66 398.91 0.79 399.95 0.90 396.85 0.50 397.89 0.66 398.93 0.79 399.97 0.90 396.87 0.51 397.91 0.66 398.95 0.79 399.99 0.90 396.89 0.51 397.93 0.67 398.97 0.79 400.01 0.90 396.91 0.52 397.95 0.67 398.99 0.80 400.03 0.90 396.93 0.52 397.97 0.67 399.01 0.80 400.05 0.91 396.95 0.52 397.99 0.68 399.03 0.80 400.07 0.91 396.97 0.53 398.01 0.68 399.05 0.80 400.09 0.91 396.99 0.53 398.03 0.68 399.07 0.80 400.11 0.91 397.01 0.53 398.05 0.68 399.09 0.81 400.13 0.91 397.03 0.54 398.07 0.69 399.11 0.81 400.15 0.92 397.05 0.54 398.09 0.69 399.13 0.81 400.17 0.92 397.07 0.54 398.11 0.69 399.15 0.81 397.09 0.55 398.13 0.69 399.17 0.82 397.11 0.55 398.15 0.70 399.19 0.82 397.13 0.55 398.17 0.70 399.21 0.82 397.15 0.55 398.19 0.70 399.23 0.82 397.17 0.56 398.21 0.70 399.25 0.82 397.19 0.56 398.23 0.71 399.27 0.83 Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 146 Stage-Area-Storage for Pond 13P: Bioretention 1 Media Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 396.17 870 0 398.77 870 827 396.22 870 17 398.82 870 837 396.27 870 35 398.87 870 848 396.32 870 52 398.92 870 859 396.37 870 70 398.97 870 870 396.42 870 87 399.02 870 881 396.47 870 104 399.07 870 892 396.52 870 122 399.12 870 903 396.57 870 139 399.17 870 914 396.62 870 157 399.22 870 924 396.67 870 174 399.27 870 935 396.72 870 191 399.32 870 946 396.77 870 209 399.37 870 957 396.82 870 226 399.42 870 968 396.87 870 244 399.47 870 979 396.92 870 261 399.52 870 990 396.97 870 278 399.57 870 1,000 397.02 870 296 399.62 870 1,011 397.07 870 313 399.67 870 1,022 397.12 870 331 399.72 870 1,033 397.17 870 348 399.77 870 1,044 397.22 870 365 399.82 870 1,055 397.27 870 383 399.87 870 1,066 397.32 870 400 399.92 870 1,077 397.37 870 418 399.97 870 1,088 397.42 870 435 400.02 870 1,098 397.47 870 452 400.07 870 1,109 397.52 870 470 400.12 870 1,120 397.57 870 487 400.17 870 1,131 397.62 870 505 397.67 870 522 397.72 870 539 397.77 870 557 397.82 870 574 397.87 870 592 397.92 870 609 397.97 870 626 398.02 870 644 398.07 870 661 398.12 870 679 398.17 870 696 398.22 870 707 398.27 870 718 398.32 870 729 398.37 870 739 398.42 870 750 398.47 870 761 398.52 870 772 398.57 870 783 398.62 870 794 398.67 870 805 398.72 870 816 Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 147 Summary for Pond 15P: Bioretention 2 Ponding Inflow Area = 0.880 ac, 76.14% Impervious, Inflow Depth > 7.24" for 100 YR event Inflow = 10.90 cfs @ 11.96 hrs, Volume= 0.531 af Outflow = 8.52 cfs @ 12.01 hrs, Volume= 0.522 af, Atten= 22%, Lag= 3.0 min Primary = 8.28 cfs @ 12.01 hrs, Volume= 0.320 af Secondary= 0.24 cfs @ 12.01 hrs, Volume= 0.203 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 400.45' @ 12.01 hrs Surf.Area= 2,579 sf Storage= 3,020 cf Plug-Flow detention time=23.7 min calculated for 0.522 af(98% of inflow) Center-of-Mass det. time= 16.4 min ( 746.8 - 730.4 ) Volume Invert Avail.Storage Storage Description #1 399.00' 4,550 cf Custom Stage Data (Prismaticyisted below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 399.00 1,596 0 0 401.00 2,954 4,550 4,550 Device Routing Invert Outlet Devices #1 Secondary 399.00' 4.000 in/hr Exfiltration over Surface area Conductivity to Groundwater Elevation = 1.00' #2 Primary 399.50' 18.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=8.27 cfs @ 12.01 hrs HW=400.45' (Free Discharge) L2=Orifice/Grate (Orifice Controls 8.27 cfs @ 4.68 fps) Secondary OutFlow Max=0.24 cfs @ 12.01 hrs HW=400.45' (Free Discharge) L1=Exfiltration ( Controls 0.24 cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 148 Pond 15P: Bioretention 2 Ponding Hydrograph Z. Inflow foso�s Outflow mary 12: Inflow Area=0.880 ac °Se ondary 117 Peak EIev400.45' Storage= 020 cf gsV� -- 18.28 cfs 000 9- 8- A Z" 7' 3 6: il o - / 110 LL 5- /ee 4- 3- 2 ./rrrrririrrr�rrr�rr�rr.�rrrrrrrrr� 1: 0' ....(....(....,. . 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 15P: Bioretention 2 Ponding Stage-Discharge ■Total , z/./ ■ I 401 % ©Secondary r' v w47. //rr������� :f.44 Orifice/Grate Exfiltration / 399 0 1 2 3 4 5 6 7 8 9 10 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 149 Pond 15P: Bioretention 2 Ponding Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ftl 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 2,600 2,800 ■Surface / I ■Storage 401 • N ,._ _ 1 _IL 0 400 i ,, ' w , w . Custom Stage Data 399 , , 0 500 1,000 1,500 2,000 2,500 3000 3,500 4,000 4,500 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 150 Hydrograph for Pond 15P: Bioretention 2 Ponding Time Inflow Storage Elevation Outflow Primary Secondary (hours) (cfs) (cubic-feet) (feet) (cfs) (cfs) (cfs) 0.00 0.00 0 399.00 0.00 0.00 0.00 0.50 0.00 0 399.00 0.00 0.00 0.00 1.00 0.00 0 399.00 0.00 0.00 0.00 1.50 0.00 0 399.00 0.00 0.00 0.00 2.00 0.00 0 399.00 0.00 0.00 0.00 2.50 0.01 2 399.00 0.01 0.00 0.01 3.00 0.02 4 399.00 0.02 0.00 0.02 3.50 0.03 6 399.00 0.03 0.00 0.03 4.00 0.04 8 399.01 0.04 0.00 0.04 4.50 0.05 10 399.01 0.05 0.00 0.05 5.00 0.06 13 399.01 0.06 0.00 0.06 5.50 0.07 15 399.01 0.07 0.00 0.07 6.00 0.08 17 399.01 0.08 0.00 0.08 6.50 0.09 20 399.01 0.09 0.00 0.09 7.00 0.10 22 399.01 0.10 0.00 0.10 7.50 0.11 24 399.02 0.11 0.00 0.11 8.00 0.12 26 399.02 0.12 0.00 0.12 8.50 0.15 32 399.02 0.15 0.00 0.15 9.00 0.19 74 399.05 0.15 0.00 0.15 9.50 0.20 157 399.10 0.15 0.00 0.15 10.00 0.25 278 399.17 0.16 0.00 0.16 10.50 0.33 510 399.30 0.17 0.00 0.17 11.00 0.47 914 399.52 0.22 0.03 0.18 11.50 0.79 1.097 399.61 0.74 0.55 0.19 12.00 9.02 3,015 400.44 8.51 8.27 0.24 12.50 0.79 1,138 399.63 0.90 0.71 0.19 13.00 0.49 1,037 399.58 0.52 0.34 0.18 13.50 0.37 994 399.56 0.39 0.21 0.18 14.00 0.29 962 399.54 0.31 0.13 0.18 14.50 0.26 941 399.53 0.26 0.08 0.18 15.00 0.23 928 399.52 0.24 0.06 0.18 15.50 0.20 914 399.52 0.22 0.03 0.18 16.00 0.18 892 399.50 0.19 0.01 0.18 16.50 0.17 873 399.49 0.18 0.00 0.18 17.00 0.16 842 399.48 0.18 0.00 0.18 17.50 0.15 796 399.45 0.18 0.00 0.18 18.00 0.14 736 399.42 0.17 0.00 0.17 18.50 0.13 664 399.38 0.17 0.00 0.17 19.00 0.12 579 399.34 0.17 0.00 0.17 19.50 0.11 483 399.29 0.17 0.00 0.17 20.00 0.10 376 399.22 0.16 0.00 0.16 Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 151 Stage-Discharge for Pond 15P: Bioretention 2 Ponding Elevation Discharge Primary Secondary Elevation Discharge Primary Secondary (feet) (cfs) (cfs) (cfs) (feet) (cfs) (cfs) (cfs) 399.00 0.00 0.00 0.00 400.04 6.33 6.11 0.21 399.02 0.15 0.00 0.15 400.06 6.58 6.37 0.21 399.04 0.15 0.00 0.15 400.08 6.70 6.48 0.22 399.06 0.15 0.00 0.15 400.10 6.81 6.59 0.22 399.08 0.15 0.00 0.15 400.12 6.92 6.70 0.22 399.10 0.15 0.00 0.15 400.14 7.03 6.81 0.22 399.12 0.16 0.00 0.16 400.16 7.13 6.91 0.22 399.14 0.16 0.00 0.16 400.18 7.24 7.02 0.22 399.16 0.16 0.00 0.16 400.20 7.34 7.12 0.22 399.18 0.16 0.00 0.16 400.22 7.44 7.22 0.23 399.20 0.16 0.00 0.16 400.24 7.55 7.32 0.23 399.22 0.16 0.00 0.16 400.26 7.65 7.42 0.23 399.24 0.16 0.00 0.16 400.28 7.74 7.51 0.23 399.26 0.16 0.00 0.16 400.30 7.84 7.61 0.23 399.28 0.17 0.00 0.17 400.32 7.94 7.71 0.23 399.30 0.17 0.00 0.17 400.34 8.03 7.80 0.23 399.32 0.17 0.00 0.17 400.36 8.12 7.89 0.23 399.34 0.17 0.00 0.17 400.38 8.22 7.98 0.24 399.36 0.17 0.00 0.17 400.40 8.31 8.07 0.24 399.38 0.17 0.00 0.17 400.42 8.40 8.16 0.24 399.40 0.17 0.00 0.17 400.44 8.49 8.25 0.24 399.42 0.17 0.00 0.17 400.46 8.58 8.34 0.24 399.44 0.18 0.00 0.18 400.48 8.66 8.42 0.24 399.46 0.18 0.00 0.18 400.50 8.75 8.51 0.24 399.48 0.18 0.00 0.18 400.52 8.84 8.59 0.24 399.50 0.18 0.00 0.18 400.54 8.92 8.68 0.25 399.52 0.22 0.04 0.18 400.56 9.01 8.76 0.25 399.54 0.31 0.12 0.18 400.58 9.09 8.84 0.25 399.56 0.41 0.23 0.18 400.60 9.17 8.92 0.25 399.58 0.53 0.35 0.18 400.62 9.26 9.00 0.25 399.60 0.67 0.49 0.19 400.64 9.34 9.08 0.25 399.62 0.83 0.64 0.19 400.66 9.42 9.16 0.25 399.64 1.00 0.81 0.19 400.68 9.50 9.24 0.25 399.66 1.18 0.99 0.19 400.70 9.58 9.32 0.26 399.68 1.37 1.18 0.19 400.72 9.66 9.40 0.26 399.70 1.57 1.38 0.19 400.74 9.73 9.47 0.26 399.72 1.78 1.59 0.19 400.76 9.81 9.55 0.26 399.74 2.01 1.81 0.19 400.78 9.89 9.63 0.26 399.76 2.24 2.04 0.20 400.80 9.96 9.70 0.26 399.78 2.48 2.28 0.20 400.82 10.04 9.78 0.26 399.80 2.73 2.53 0.20 400.84 10.11 9.85 0.26 399.82 2.99 2.79 0.20 400.86 10.19 9.92 0.27 399.84 3.26 3.05 0.20 400.88 10.26 10.00 0.27 399.86 3.53 3.33 0.20 400.90 10.34 10.07 0.27 399.88 3.81 3.61 0.20 400.92 10.41 10.14 0.27 399.90 4.10 3.90 0.20 400.94 10.48 10.21 0.27 399.92 4.40 4.19 0.21 400.96 10.55 10.28 0.27 399.94 4.70 4.50 0.21 400.98 10.62 10.35 0.27 399.96 5.02 4.81 0.21 401.00 10.70 10.42 0.27 399.98 5.33 5.12 0.21 400.00 5.66 5.45 0.21 400.02 5.99 5.78 0.21 Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 152 Stage-Area-Storage for Pond 15P: Bioretention 2 Ponding Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet (sq-ft) (cubic-feet) 399.00 1,596 0 400.04 2,302 2,027 399.02 1,610 32 400.06 2,316 2,073 399.04 1,623 64 400.08 2,329 2,120 399.06 1,637 97 400.10 2.343 2,166 399.08 1,650 130 400.12 2,356 2,213 399.10 1,664 163 400.14 2,370 2,261 399.12 1,677 196 400.16 2,384 2,308 399.14 1,691 230 400.18 2,397 2,356 399.16 1,705 264 400.20 2,411 2,404 399.18 1,718 298 400.22 2.424 2,452 399.20 1,732 333 400.24 2,438 2,501 399.22 1,745 368 400.26 2,452 2,550 399.24 1,759 403 400.28 2,465 2,599 399.26 1,773 438 400.30 2,479 2,649 399.28 1,786 473 400.32 2,492 2,698 399.30 1,800 509 400.34 2,506 2,748 399.32 1,813 545 400.36 2,519 2,798 399.34 1,827 582 400.38 2,533 2,849 399.36 1,840 619 400.40 2,547 2,900 399.38 1,854 656 400.42 2,560 2,951 399.40 1,868 693 400.44 2,574 3,002 399.42 1,881 730 400.46 2,587 3,054 399.44 1,895 768 400.48 2.601 3,106 399.46 1,908 806 400.50 2,615 3,158 399.48 1,922 844 400.52 2,628 3,210 399.50 1,936 883 400.54 2,642 3,263 399.52 1,949 922 400.56 2,655 3,316 399.54 1,963 961 400.58 2,669 3,369 399.56 1,976 1,000 400.60 2,682 3,423 399.58 1,990 1,040 400.62 2,696 3,477 399.60 2,003 1,080 400.64 2,710 3,531 399.62 2,017 1,120 400.66 2,723 3,585 399.64 2,031 1,160 400.68 2,737 3,639 399.66 2,044 1,201 400.70 2,750 3,694 399.68 2,058 1,242 400.72 2,764 3,749 399.70 2,071 1,284 400.74 2,777 3,805 399.72 2,085 1,325 400.76 2,791 3,861 399.74 2,098 1,367 400.78 2,805 3,917 399.76 2,112 1,409 400.80 2.818 3,973 399.78 2,126 1,451 400.82 2,832 4,029 399.80 2,139 1,494 400.84 2.845 4,086 399.82 2,153 1,537 400.86 2,859 4,143 399.84 2,166 1,580 400.88 2,873 4,200 399.86 2,180 1,624 400.90 2,886 4,258 399.88 2,194 1,667 400.92 2,900 4,316 399.90 2,207 1,711 400.94 2,913 4,374 399.92 2,221 1,756 400.96 2,927 4,432 399.94 2,234 1,800 400.98 2,940 4,491 399.96 2,248 1,845 401.00 2,954 4,550 399.98 2,261 1,890 400.00 2,275 1,936 400.02 2,289 1,981 Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 153 Summary for Pond 16P: Bioretention 2 Media Inflow = 0.24 cfs @ 12.01 hrs, Volume= 0.203 af Outflow = 0.23 cfs @ 12.06 hrs, Volume= 0.180 af, Atten= 4%, Lag= 3.1 min Primary = 0.23 cfs @ 12.06 hrs, Volume= 0.180 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Peak Elev= 395.43' @ 12.06 hrs Surf.Area= 1,500 sf Storage= 1,008 cf Plug-Flow detention time= 103.5 min calculated for 0.180 af(89% of inflow) Center-of-Mass det. time= 56.1 min ( 830.0 - 773.8 ) Volume Invert Avail.Storage Storage Description #1 393.75' 2,419 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Voids Inc.Store Cum.Store (feet) (sq-ft) (%) (cubic-feet) (cubic-feet) 393.75 1,500 0.0 0 0 395.75 1,500 40.0 1,200 1,200 399.00 1,500 25.0 1,219 2,419 Device Routing Invert Outlet Devices #1 Primary 395.24' 4.0"Vert. Orifice/Grate X 3.00 C= 0.600 Primary OutFlow Max=0.23 cfs @ 12.06 hrs HW=395.43' (Free Discharge) t--1=Orifice/Grate (Orifice Controls 0.23 cfs @ 1.49 fps) Pond 16P: Bioretention 2 Media Hydrograph I Inflow ` 0.26- 024a' ❑Primary 0.24 Peak Elev=395.43' 023 cfs 0.22 Storage=1 ,008 1cf ]. 0.2 , 0.18 0.16 0.14- 0 0.12- u. 0.1 7 0.08 0.06 0.04 0.02 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 154 Pond 16P: Bioretention 2 Media Stage-Discharge 399 ■Primary 398 397 a a c 0 a d 396 w 395 394 / 0 1 Discharge (cfs) Pond 16P: Bioretention 2 Media Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 0 Surface •Storage 399 398 397 w 0 0 d 396 395-- 394- 401101.111604111a 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200 2,400 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 155 Hydrograph for Pond 16P: Bioretention 2 Media Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 393.75 0.00 0.50 0.00 0 393.75 0.00 1.00 0.00 0 393.75 0.00 1.50 0.00 0 393.75 0.00 2.00 0.00 0 393.75 0.00 2.50 0.01 10 393.77 0.00 3.00 0.02 38 393.81 0.00 3.50 0.03 84 393.89 0.00 4.00 0.04 146 393.99 0.00 4.50 0.05 225 394.12 0.00 5.00 0.06 322 394.29 0.00 5.50 0.07 438 394.48 0.00 6.00 0.08 573 394.71 0.00 6.50 0.09 728 394.96 0.00 7.00 0.10 901 395.25 0.00 7.50 0.11 968 395.36 0.11 8.00 0.12 973 395.37 0.12 8.50 0.15 981 395.39 0.14 9.00 0.15 983 395.39 0.15 9.50 0.15 984 395.39 0.15 10.00 0.16 986 395.39 0.16 10.50 0.17 988 395.40 0.17 11.00 0.18 992 395.40 0.18 11.50 0.19 994 395.41 0.19 12.00 0.24 1,006 395.43 0.22 12.50 0.19 996 395.41 0.19 13.00 0.18 994 395.41 0.18 13.50 0.18 994 395.41 0.18 14.00 0.18 993 395.41 0.18 14.50 0.18 993 395.41 0.18 15.00 0.18 993 395.40 0.18 15.50 0.18 993 395.40 0.18 16.00 0.18 993 395.40 0.18 16.50 0.18 992 395.40 0.18 17.00 0.18 992 395.40 0.18 17.50 0.18 992 395.40 0.18 18.00 0.17 991 395.40 0.17 18.50 0.17 990 395.40 0.17 19.00 0.17 989 395.40 0.17 19.50 0.17 988 395.40 0.17 20.00 0.16 987 395.40 0.16 Storm Calcs-update 2-12-2020 Type l/ 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 156 Stage-Discharge for Pond 16P: Bioretention 2 Media Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) 393.75 0.00 395.83 0.82 397.91 1.99 393.79 0.00 395.87 0.86 397.95 2.01 393.83 0.00 395.91 0.89 397.99 2.03 393.87 0.00 395.95 0.93 398.03 2.04 393.91 0.00 395.99 0.96 398.07 2.06 393.95 0.00 396.03 1.00 398.11 2.07 393.99 0.00 396.07 1.03 398.15 2.09 394.03 0.00 396.11 1.06 398.19 2.10 394.07 0.00 396.15 1.09 398.23 2.12 394.11 0.00 396.19 1.12 398.27 2.13 394.15 0.00 396.23 1.14 398.31 2.15 394.19 0.00 396.27 1.17 398.35 2.16 394.23 0.00 396.31 1.20 398.39 2.18 394.27 0.00 396.35 1.22 398.43 2.19 394.31 0.00 396.39 1.25 398.47 2.21 394.35 0.00 396.43 1.28 398.51 2.22 394.39 0.00 396.47 1.30 398.55 2.23 394.43 0.00 396.51 1.32 398.59 2.25 394.47 0.00 396.55 1.35 398.63 2.26 394.51 0.00 396.59 1.37 398.67 2.28 394.55 0.00 396.63 1.39 398.71 2.29 394.59 0.00 396.67 1.42 398.75 2.30 394.63 0.00 396.71 1.44 398.79 2.32 394.67 0.00 396.75 1.46 398.83 2.33 394.71 0.00 396.79 1.48 398.87 2.35 394.75 0.00 396.83 1.50 398.91 2.36 394.79 0.00 396.87 1.52 398.95 2.37 394.83 0.00 396.91 1.55 398.99 2.39 394.87 0.00 396.95 1.57 394.91 0.00 396.99 1.59 394.95 0.00 397.03 1.61 394.99 0.00 397.07 1.63 395.03 0.00 397.11 1.65 395.07 0.00 397.15 1.66 395.11 0.00 397.19 1.68 395.15 0.00 397.23 1.70 395.19 0.00 397.27 1.72 395.23 0.00 397.31 1.74 395.27 0.01 397.35 1.76 395.31 0.04 397.39 1.78 395.35 0.09 397.43 1.79 395.39 0.15 397.47 1.81 395.43 0.23 397.51 1.83 395.47 0.31 397.55 1.85 395.51 0.40 397.59 1.86 395.55 0.48 397.63 1.88 395.59 0.54 397.67 1.90 395.63 0.60 397.71 1.91 395.67 0.65 397.75 1.93 395.71 0.69 397.79 1.95 395.75 0.74 397.83 1.96 395.79 0.78 397.87 1.98 Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 157 Stage-Area-Storage for Pond 16P: Bioretention 2 Media Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 393.75 1,500 0 398.95 1,500 2,400 393.85 1,500 60 393.95 1,500 120 394.05 1,500 180 394.15 1,500 240 394.25 1,500 300 394.35 1,500 360 394.45 1,500 420 394.55 1,500 480 394.65 1,500 540 394.75 1,500 600 394.85 1,500 660 394.95 1,500 720 395.05 1,500 780 395.15 1,500 840 395.25 1,500 900 395.35 1,500 960 395.45 1,500 1,020 395.55 1,500 1,080 395.65 1,500 1,140 395.75 1,500 1,200 395.85 1,500 1,238 395.95 1,500 1,275 396.05 1,500 1,313 396.15 1,500 1,350 396.25 1,500 1,388 396.35 1,500 1,425 396.45 1,500 1,462 396.55 1,500 1,500 396.65 1,500 1,537 396.75 1,500 1,575 396.85 1,500 1,613 396.95 1,500 1,650 397.05 1,500 1,688 397.15 1,500 1,725 397.25 1,500 1,763 397.35 1,500 1,800 397.45 1,500 1,837 397.55 1,500 1,875 397.65 1,500 1,912 397.75 1,500 1,950 397.85 1,500 1,988 397.95 1,500 2,025 398.05 1,500 2,063 398.15 1,500 2,100 398.25 1,500 2,138 398.35 1,500 2,175 398.45 1,500 2,212 398.55 1,500 2,250 398.65 1,500 2,287 398.75 1,500 2,325 398.85 1,500 2,363 Storm Calcs-update 2-12-2020 Type l/ 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 158 Summary for Pond 18P: Modified SWM Facility [44] Hint: Outlet device#2 is below defined storage Inflow Area = 4.200 ac, 55.24% Impervious, Inflow Depth > 6.52" for 100 YR event Inflow = 35.48 cfs @ 12.01 hrs, Volume= 2.282 af Outflow = 28.71 cfs @ 12.08 hrs, Volume= 2.264 af, Atten= 19%, Lag= 4.4 min Primary = 28.71 cfs @ 12.08 hrs, Volume= 2.264 af Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs/ 3 Peak Elev= 394.65' @ 12.08 hrs Surf.Area= 4,573 sf Storage= 16,132 cf Plug-Flow detention time=21.3 min calculated for 2.262 af(99% of inflow) Center-of-Mass det. time= 17.7 min ( 774.3 - 756.6 ) Volume Invert Avail.Storage Storage Description #1 390.05' 17,748 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 390.05 2,437 0 0 395.00 4,734 17,748 17,748 Device Routing Invert Outlet Devices #1 Primary 390.05' 24.0" Round Culvert L= 52.0' RCP, square edge headwall, Ke= 0.500 Inlet/ Outlet Invert= 390.05'/ 389.75' S= 0.0058 '/' Cc= 0.900 n= 0.011 Concrete pipe, straight& clean, Flow Area= 3.14 sf #2 Device 1 389.05' 7.0" W x 7.0" H Vert. Orifice/Grate C= 0.600 #3 Device 1 392.25' 24.0" W x 18.0" H Vert. Orifice/Grate C= 0.600 #4 Device 1 393.75' 24.0" x 24.0" Horiz. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=28.71 cfs @ 12.08 hrs HW=394.65' (Free Discharge) L1=Culvert (Inlet Controls 28.71 cfs @ 9.14 fps) -2=Orifice/Grate (Passes < 3.51 cfs potential flow) -3=Orifice/Grate (Passes < 18.40 cfs potential flow) -4=Orifice/Grate (Passes < 18.29 cfs potential flow) Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 159 Pond 18P: Modified SWM Facility Hydrograph / L■InflowPrimary 38 135.48 cfs I ■ 36 Inflow Area=4.200 ac 34 32 Peak Elev=394.65' 28. Storage=16,132 cf 2871ch 26 24 22 20 0 18 LL 16 14 12 10 8 6 4 2, 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) Pond 18P: Modified SWM Facility Stage-Discharge 395 / ■Primary' 394 d 393 d c o Ortniderate > d w 392 391 0 2 4 6 8 10 12 14 1,6 18 20 22 24 26 .28' 30 Discharge (cfs) Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD®10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 160 Pond 18P: Modified SWM Facility Stage-Area-Storage Surface/HorizontalfWetted Area(sq-ft) 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 0 Surface II ■Storage 395-/ 394 : 393- c 0 w 392- 391- 11111111111111111111111110 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 Storage(cubic-feet) Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 161 Hydrograph for Pond 18P: Modified SWM Facility Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 390.05 0.00 0.50 0.00 0 390.05 0.00 1.00 0.00 0 390.05 0.00 1.50 0.00 0 390.05 0.00 2.00 0.00 0 390.05 0.00 2.50 0.00 0 390.05 0.00 3.00 0.02 13 390.06 0.00 3.50 0.04 55 390.07 0.01 4.00 0.06 123 390.10 0.01 4.50 0.08 197 390.13 0.04 5.00 0.10 268 390.16 0.06 5.50 0.13 333 390.18 0.10 6.00 0.17 395 390.21 0.14 6.50 0.20 447 390.23 0.18 7.00 0.24 497 390.25 0.21 7.50 0.39 614 390.30 0.32 8.00 0.44 689 390.33 0.41 8.50 0.51 746 390.35 0.47 9.00 0.60 815 390.37 0.56 9.50 0.66 873 390.40 0.63 10.00 0.73 916 390.41 0.70 10.50 0.91 1,014 390.45 0.84 11.00 1.57 1,405 390.60 1.21 11.50 3.00 2,893 391.13 1.70 12.00 35.23 14,844 394.37 27.55 12.50 5.32 9,540 393.09 7.77 13.00 2.52 7,207 392.46 3.15 13.50 1.85 6,293 392.19 2.40 14.00 1.45 5,096 391.84 2.19 14.50 1.23 3.772 391.42 1.92 15.00 1.11 2.680 391.05 1.64 15.50 0.99 1,854 390.76 1.38 16.00 0.87 1,257 390.54 1.15 16.50 0.80 1,015 390.45 0.84 17.00 0.76 974 390.44 0.78 17.50 0.73 948 390.43 0.74 18.00 0.69 923 390.42 0.71 18.50 0.65 898 390.41 0.67 19.00 0.62 872 390.40 0.63 19.50 0.58 843 390.39 0.60 20.00 0.54 814 390.37 0.56 Storm Calcs-update 2-12-2020 Type 1124-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 162 Stage-Discharge for Pond 18P: Modified SWM Facility Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) 390.05 0.00 392.65 4.27 390.10 0.01 392.70 4.61 390.15 0.05 392.75 4.96 390.20 0.12 392.80 5.34 390.25 0.21 392.85 5.73 390.30 0.33 392.90 6.13 390.35 0.48 392.95 6.55 390.40 0.65 393.00 6.98 390.45 0.83 393.05 7.43 390.50 1.04 393.10 7.89 390.55 1.16 393.15 8.37 390.60 1.22 393.20 8.85 390.65 1.27 393.25 9.35 390.70 1.32 393.30 9.86 390.75 1.37 393.35 10.38 390.80 1.42 393.40 10.92 390.85 1.47 393.45 11.46 390.90 1.51 393.50 12.02 390.95 1.55 393.55 12.58 391.00 1.60 393.60 13.16 391.05 1.64 393.65 13.74 391.10 1.68 393.70 14.34 391.15 1.72 393.75 14.95 391.20 1.76 393.80 15.78 391.25 1.79 393.85 16.81 391.30 1.83 393.90 17.97 391.35 1.87 393.95 19.23 391.40 1.90 394.00 20.59 391.45 1.94 394.05 22.02 391.50 1.97 394.10 23.54 391.55 2.01 394.15 25.13 391.60 2.04 394.20 26.78 391.65 2.07 394.25 27.06 391.70 2.10 394.30 27.27 391.75 2.14 394.35 27.48 391.80 2.17 394.40 27.69 391.85 2.20 394.45 27.89 391.90 2.23 394.50 28.10 391.95 2.26 394.55 28.30 392.00 2.29 394.60 28.50 392.05 2.32 394.65 28.70 392.10 2.35 394.70 28.90 392.15 2.37 394.75 29.10 392.20 2.40 394.80 29.29 392.25 2.43 394.85 29.49 392.30 2.53 394.90 29.68 392.35 2.69 394.95 29.87 392.40 2.88 395.00 30.06 392.45 3.11 392.50 3.37 392.55 3.65 392.60 3.95 Storm Calcs-update 2-12-2020 Type II 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 163 Stage-Area-Storage for Pond 18P: Modified SWM Facility Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 390.05 2,437 0 392.65 3,644 7,905 390.10 2,460 122 392.70 3,667 8,087 390.15 2,483 246 392.75 3,690 8,271 390.20 2,507 371 392.80 3,713 8,456 390.25 2,530 497 392.85 3,736 8,643 390.30 2,553 624 392.90 3,760 8,830 390.35 2,576 752 392.95 3,783 9,019 390.40 2,599 881 393.00 3,806 9,208 390.45 2,623 1,012 393.05 3,829 9,399 390.50 2,646 1,144 393.10 3,852 9,591 390.55 2,669 1,277 393.15 3,876 9,784 390.60 2,692 1,411 393.20 3,899 9,979 390.65 2,715 1,546 393.25 3,922 10,174 390.70 2,739 1,682 393.30 3,945 10,371 390.75 2,762 1,820 393.35 3,968 10,569 390.80 2,785 1,958 393.40 3,992 10,768 390.85 2,808 2,098 393.45 4,015 10,968 390.90 2,831 2,239 393.50 4,038 11,169 390.95 2,855 2,381 393.55 4,061 11,372 391.00 2,878 2,525 393.60 4,084 11,575 391.05 2,901 2,669 393.65 4,108 11,780 391.10 2,924 2,815 393.70 4,131 11,986 391.15 2,947 2,961 393.75 4,154 12,193 391.20 2,971 3,109 393.80 4,177 12,402 391.25 2,994 3,259 393.85 4,200 12,611 391.30 3,017 3,409 393.90 4,224 12,822 391.35 3,040 3,560 393.95 4,247 13,033 391.40 3,063 3,713 394.00 4,270 13,246 391.45 3,087 3,867 394.05 4,293 13,460 391.50 3,110 4,021 394.10 4,316 13,676 391.55 3,133 4,178 394.15 4,340 13,892 391.60 3,156 4,335 394.20 4,363 14,110 391.65 3,179 4,493 394.25 4,386 14,328 391.70 3,203 4,653 394.30 4,409 14,548 391.75 3,226 4,813 394.35 4,432 14,769 391.80 3,249 4,975 394.40 4,456 14,991 391.85 3,272 5,138 394.45 4,479 15,215 391.90 3,295 5,303 394.50 4,502 15,439 391.95 3,319 5,468 394.55 4,525 15,665 392.00 3,342 5,634 394.60 4,548 15,892 392.05 3,365 5,802 394.65 4,572 16,120 392.10 3,388 5,971 394.70 4,595 16,349 392.15 3,411 6,141 394.75 4,618 16,579 392.20 3,435 6,312 394.80 4,641 16,811 392.25 3,458 6,484 394.85 4,664 17,043 392.30 3,481 6,658 394.90 4,688 17,277 392.35 3,504 6,832 394.95 4,711 17,512 392.40 3,527 7,008 395.00 4,734 17,748 392.45 3,551 7,185 392.50 3,574 7,363 392.55 3,597 7,543 392.60 3,620 7,723 Storm Calcs-update 2-12-2020 Type 11 24-hr 100 YR Rainfall=8.62" Prepared by Timmons Group Printed 2/13/2020 HydroCAD® 10.00-25 s/n 08663 ©2019 HydroCAD Software Solutions LLC Page 164 Summary for Link 20L: Post Analysis Point 1 Inflow Area = 4.300 ac, 55.58% Impervious, Inflow Depth > 6.48" for 100 YR event Inflow = 29.54 cfs @ 12.08 hrs, Volume= 2.323 af Primary = 29.54 cfs @ 12.08 hrs, Volume= 2.323 af, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs Link 20L: Post Analysis Point 1 Hydrograph / Inflow II 322.- j 20.84ds I ❑Primary 3o Inflow Area=4.300 ac "°' 26- 26- 24= -- 22= 20H 18 3 16 3 LL 14 12 10 8 6 4 2 0 .T,. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Time (hours) N O U) (p N 0 O r- QO N N C O Z+y Mst Tr (ON � NC) Nd' MMN MOO — NMNCDOICO - CDCOCDCDNO0) NrNOCDNU) NtN O)OCD (nMN00) 1- O �.m OOQ7 .- N ,r (00) I� NOCONNyy ) N .- OaONCOinyMN ,- 00000WWNt� I� I� 1Nf- CDCO (D (O (000 (DU[) ([) V.O O M N N O CD M N N N N N N N O O O O O O O O O O O O O O O O O O O a- d V. C N �O d c _-0000000000000000000000000000000000000000000000000 0 2Z0oO000oo00000000000000000000000000000000000000000 4 H � 00000000000000000000000000000000 0 00000000000000000 �, v y > " I- _1 >+ a) - y M W c C y y CD Nm- NLON V C') C) N MC NC') NOO) 001� 00 CD CD C01� 00) st NO OD N U) ntN 0) 0001.0 ) N00) I- j < C) p w N7 V 0 N 00 0) '- ' CD 0) 1s 0 C0 T- T f� .4- el N 0O U co. N ar T- co00 1� at 7 0 03 CO 00 010 f- 1- 1- 1- 1-1, (D U(0 00 CO O0 CO CD U) N O O M N N N N N N N O O O O O O O O O O O O O O O O O O Op O V. N( 0 a m J 0 O N N ^0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 U) Y E n V CDOOONd- COOOONst0c0oNstC0000N V- 00000N -tCO0DON •7 (DODON � COODON ,7ODOOONv (D000 0 c H O OOO N N N N Ni M O*) M M M 44 Ni 44 ui ui uiuiuiCDCDCD CO (D N N N N N 06 06 06 06 00 0) 0) 0) 6) 0) O U J .c-I o I a..N 00000000000000000 - - - N C') U) - 000 — M (fl00000)� MCO CD 0) N 44 st O - I'- 0) NN f 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 N N N M M M (A 0 n 0 0 O (0 C D f l O o M E v O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O N O ..c O N CO a N 0 O N acn r CO �+ C w 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 , 2 (0 I Oy0000000000000000000000000000000000000000000000000000 Noo '-�vo000000000000000000000000000000000000000000000000000 m Co a) m O W . E N 00000000000000000 ,- MNt () N00N .tN 0)NrCO � NNN m E Op 0 w N � 0 - C'M (nCDC00) CMCDCD0) O O O O O O O O O O O O O O O O O 0 0 0 0 0 0 0 0 0 0 N N N M M M V V V I (n 01)(O (D 0 0 C D N yFo � �0000000000000OO0000O000000000O000000000000O000000000 cOM ® 073 Q E O a) 0000000000000000000oOoOo0O00000000000000000000000000 L QO E i ONv0000oNvomoNv0000ONvCD000Nv. CO000NvCD000Nv 00000Nvt (o000Nm- 00000N . CO000N � NU F 0 00000 NNNNNMMMMM ' 4 � ai40 U)) 0C)) CDCDDDCD1� l� NNN0 00 00 00 00 0) W 0) 0) 0) 00 Nat 1 I I data Input cells - Project Name: Scottsville Elementary School Addition Date: 9/5/2019 Constant values Linear Development Project? No akulatlon cells Site Information 11=1311- Post-Development Project(Treatment Volume and Loads) r Enter Total Disturbed Area(acres) 4 3.11 Check: BMP Design Specifications List: 2013 Draft Stds&Specs Maximum reduction required: 20% Linear project? No The site's net increase in impervious cover(acres)is: 0.72 Land cover areas entered correctly? Ne Post-Development TP Load Reduction for Site(Ib/yr): 1.71 Total disturbed area entered? v/ Pre-ReDevelopment Land Cover (acres) A Soils B Soils C Soils D Soils Totals Forest/Open Space(acres)--undisturbed forest/open space _ 0.10 0.10 Managed Turf(acres)--disturbed,graded for 2.39 yards or other turf to be mowed/managed 2.39 Impervious Cover(acres) 0.62 _- 0.62 3.11 J - iJ_ ----- Post-Development Land Cover(acres) A Soils B Soils C Soils D Soils L Totals Forest/Open Space(acres)--undisturbed, protected forest/open space or reforested land 0.07 0.07 Managed Turf(acres)--disturbed,graded for 1.70 yards or other turf to be mowed/managed 1.70 Impervious Cover(acres) 1.34 1.34 Area Check OK. OK. OK. OK. 3.11 •Forest/Open Space areas must be protected in accordance with the Virginia Runoff Reduction Method - -- - Constants Runoff Coefficients(Rv) Annual Rainfall(inches) 43 A Soils B Soils C Soils D Soils Target Rainfall Event(inches) 1.00 _Forest/Open Space 0.02 0.03 0.04 0.05 Total Phosphorus(TP)EMC(mg/L) 0.26 Managed Turf 0.15 0.20 0.22 0.25 Total Nitrogen(TN)EMC(mg/L) 1.86 Impervious Cover 0.95 0.95 0.95 0.95 Target TP Load(lb/acre/yr) 0.41 Pj(unitless correction factor) 0.90 - LAND COVER SUMMARY-- PRE-REDEVELOPMENT LAND COVER SUMMARY--POST DEVELOPMENT Land Cover Summary-Pre Land Cover Summary-Post(Final) y Land Cover Summary-Post Land Cover Summary-Post Pre-ReDevelopment Listed Adjusted' Post ReDev.a New Impervious Post-ReDevelopment Post-Development New Impervious Forest/Open Space Forest/Open Space Forest/Open Space Cover(acres) 0.10 0.07 0.07 0.07 Cover(acres) Cover(acres) Weighted Rv(forest) 0.04 0.04 Weighted fly(forest) 0.04 Weighted Rv(forest) 0.04 s -T- %Forest 3% 3% %Forest 2% %Forest 3% Managed Turf Cover Managed Turf Cover Managed Turf Cover(acres) 2.39 1.70 1.70 1.70 (acres) -_ (acres) Weighted Rv(turf) 0.22 0.22 Weighted Rv(turf) 0.22 Weighted Rv(turf) 0.22 - %Managed Turf 77% 71% %Managed Turf 55% %Managed Turf 71% - Impervious Cover ReDev.Impervious New Impervious Cover Impervious Cover(acres) 0.62 0.62 (acres) 1.34 Cover(acres) 0.62 (acres) 0.72 Rv(impervious) 0.95 0.95 Rv(impervious) 0.95 Rv(impervious) 0.95 If(impervious) 0.95 -._1-._ - ___ ._ ,__, %Impervious 20% 26% %Impervious 43% %Impervious 26% f Total Site Area(acres) 3.11 2.39 Final Site Area(acres) 3.11 Total ReDev.Site Area 2.39 - (acres) Site Re 0.36 0.40 Final Post Dev Site Rv 0.53 ReDev Site Rv 0.40 Treatment Volume and Nutrient Load Treatment Volume and Nutrient Load Final Post- _ .___ Pre-ReDevelopment Treatment Volume Development Post-ReDevelopment Post-Development (acre-ft) 0.0932 0.0805 Treatment Volume 0.1375 Treatment Volume 0.0805 Treatment Volume 0.0570 (acre-ft) (acre-ft) (acre-ft) Final Post- i Post-ReDevelopment Post-Development Pre-ReDevelopment Treatment Volume 4,061 3,506 Development 5.989 Treatment Volume 3,506 Treatment Volume(cubic 2,483 (cubic feet) Treatment Volume (cubic feet) (cubic feet) feet) Final Post- Post-ReDevelopment Pre-ReDevelopment TP Load Post-Development TP 2.55 2.20 Development TP Load 3.76 Load(TP) 2.20 1.56 (Ib/yr) (Ib/Yr) (lb/Yr)• Load(lb/yr) Pre-ReDevelopment TP load per acre mai Pox:Development TP I o:t-ReDevelopment II' pb/acre/yrl 0.82 0.92 load per acre - 21 Load per acre ID 0.v2 (Ib/acre/ye) (lb/acre/yr) Baseline TP Load(lb/yr) Max.Reduction Required 10.41 lbs/acre/yr applied to pre-redevelopment area excluding pervious 0.98 (Below Pre- 20% land proposed for new Impervious cover) ReDevelopment Load) I _ (-- 'Adjusted Land Cover Summary: TP Load Reduction TP Load Reduction Required for Pre ReDevelopment land cover minus pervious land cover(forest/open space or q 0.44 Required for New 1.26 managed turf)acreage proposed for new impervious cover. Redeveloped Area (16/yr) Impervious Area(Ib/yr) Adjusted total acreage is consistent with Post-ReDevelopment acreage(minus acreage of new impervious cover). Column I shows load reduction requriement for new impervious cover(based on new development load limit,0.41 lbs/acre/year). Post-Development Requirement for Site Area TP Load Reduction Required(Ib/yr) 1.71 Yea.RV. SPr.M.ran v3 OW 0„ Drainage Area A Dr...p.m A Land Cows Maas) ELEaP eMP ARIAS A Saes I Ws CSof Co Soft Tar* Land CaSOIts Fae.t/Do.e Mace Now) 0.02 OAS ON Rawl*(Rd avnl 1.00 1.00 all Mammon Caw laved 0.32 0.32 Taal Ta Msambau.rAradable for Removal nO.A.ARb/wl 1.10 TOM' 1.34 PoRD.wNpnent Treatm.nt Volume at D.A.A(R') 1)902 Stormwater Best Management Practices(RR=Runoff Reduction) _Sal..g from o'0000wn Ilea- WWI Managed Impervious VaMm.from ■woe RwoawEg Total IMP PNombor l INIMM.nstaad Unmated P11aap11orua Remain,' Downstream Practice roM ►r.kt)Ce Redta0Dan Turf Credit Cow C.0M UMW.O R.dINUse 1R')PwRSRVM .n ume Treatment R .wl front Umlaut,. PROMItorua Load lammed1y PRmpbaus bad TINY,*M cn nL) Are.Imam) Arwa0r5) Pr.Ve IR') Vmume ln') Efficiency 06) Prei- I 66w.MN.Db1 'make llbl (lb) I.Vegetated Root IRS) 1 a.Vegeer.Rao.0115.e 51 aS 0 0 0 0 R- am Om 000 In Watt.MOOR Don 51 6o a 0 a 0 O.m am am r Rooftop DrieonnettlOn(.1 la Vmpe Oannmttvn l0 A/.5e11 0 0 o u 0.m am Om Dw51 a 0 am 2.0 LaLM.Obwwdw 1../0S. 0 0 0 0 0 Om O.m Om IM..51 n Om SW Amend..)O Path as av SO 0 0 0 0 0 0.m am MOO..elhalon[Ire.una C/O roll.)C.c.) .xe O.m r.LbeMI.6 Freres Dam M.r Don el m o 0 0 0 IS 000 am o.m am r*OO,Y WV)co Vaeonan.04....) Or.ln6 m Tr O D O a 0 n am MOO Om 000 • - I I co Ram Gang.al. b0m Al rcranovverVon WI(Sort wI 0 0 0 0 is am 0.m am Na>sa Don 51 so 0 0 o 0 50 0.00 0.00 000 am le To R.nwta Herra,Donal 0 0 0 0 0 0 0.00 0.00 (Lai 0.m nvaev Urban we.ntan Moo..n Amer. a 0 0 0 o n o.m om 0m 0m a ver,neabev,..m,nr IxP.. 3..'n..w....mann0P33 mn as 0 a a O 25 o.W um 0.00 aW S.e Perinea.Raan n010 Dm .7) 5 0 0 0 is 0 m 0 m 0 m a Grass Channel(RR) Aa.Gran 0.nne4MSVNOwe 51 20 O 0 o a 1. O.m 0.00 OW 002 ..a.Gram 000,00.C/O be DP.MI 10 0 0 0 0 15 000 000 000 0.00 at G. ..te Tampon Amended Sale a..a.ena lM Saw.1 m 0 0 0 o IS O.m O.m Om O.m e Dry Swale(RR) S.a.Or few.el(5ms 501 40 A 0 a o w 0r00 o.W 000 0.00 S.R Ora ftr110(SPa)001 60 0 0 0 0 40 O.W 0.00 000 0.00 6 Rioret.nron{RR) 6a Mereentn.rn or microaroreentern al a) w new lS.e 51 .o lW 032 0 761 1141 l.mx CS oral 1.19 066 0S4 Here Cal 6.a Bramenn maaareamon.l an 15V 0�N BO 0 0 0 0 S0 0.00 O.W 0.m 0.m 1 Infiltration(RR) Ta 6mneuw5 CAN 51 S0 0 a 0 0 IS o.m a.W 000 0.00 Tb.in..0ar 5 ORb 51 a0 0 0 0 0 n 0.00 0m 0.00 0m 6.Emended Detention Pond(RR) .a ED.1150a.151 a 0 0 0 0 IS 0.03 am O.m 0.00 AREDY(5pn MI .S 0 0 0 0 15 003 am 0.00 0.00 Neetflow to Idler/Upen Spate IRA) 9a 07000ow Area.AA Shc.I0 Canary-Van On 95 0 0 0 0 0 O00 O.m D.m Om 9.0 Wean*M Cme,9uw Area.CMSab so 0 O.m 0.W Row 5) 0 0 0 0 am OW Be 51w.00a a VOMa7N Foe...AS.Y0 CerP.Arwm N MC/DS.b SO 0 0 0 0 0 0.m 000 am 0.00 bow MAW) TOTAL IMPERVIOUS COVER TREAT.D(at) 0.31 AREA CHECK.OR TOTAL MANAGED TURF AREA TREATED(at) 100 AREA CHECK:OK. TOTAL RUNOFF REDUCTION IN D.A.A(ft) 761 TOTAL PHOSPHORUS AVAILABLE FOR REMOVAL IN O.A.A(Ib/yr) 110 TOTAL PHOSPHORUS REMOVED WITH RUNOFF REDUCTION PRACTICES IN D.A.A(lb/se) 0.66 TOTAL PHOSPHORUS REMAINING AFTER APPLYING RUNOFF REDUCTION PRACTICES IN D.A.A(Ib/yr) use SEE WATER QUALITY COMPLIANCE TAB FOR SITE COMPLIANCE CALCULATIONS VP.Henn.,Coro acre soteaositen 73 082017 Drainage Area B Drainage Area A Land Cover lams) CLEAR BMp AREAS ma A Solis ■Sells CSells 5Sells TOMS Land Cowrfv Forest/Open Spa.(acres) 0.05 0.05 0.04 Managed turf lawns) 0.16 0.16 0.22 Imper0Ous Cover(ures) 0.67 0.67 0,95 Total Phosphorus Available for Removal in D.AB(Ib/10) 1.53 Total 0,88 Post Development Treatment Volume In D.A.B Ra) 1,438 Stormwater Best Management Practices(RR=Runoff Reduction) --select from drspdown INts- Runoff M.IraemiTOA In0B.rttnta V000R.Nora Ramainint Total BMP Ph p...,uu us Untreated RurloN amoseus lad/rom PhNPh.Vs PhmPhdB Rersphoru Downstream Prcctke to be Practice Reduction Gedi[Aran faagrfiaNt Up.berrt Runoff Treatment Mmaval Removed BY Phosphorus Credit Nei (arN) AMMANR) P.M.M9 Reduction(ft Velum.If3) Volume(4)) EHIolerron IS) UPs) as-sw i Pr.ctke)Ib) load lib) Empb9ed PrMkas(Ibl Prcttke lib) 1.Vegetated Root(RR) a01.veeetatetl Rool nlSPOOsI es WiNeN '_ 0 ! 0 04:_t" OW OW Om L b.Vonetated Root R(5Rec atl 60 It*Bff 0 0 0 0tilt' 0.60 am Om 2 Rooftop Disconnection(RP) 1.a.Simple Disconnection to 146 Sons so 0 0 0 0 0 am ore o.m ow OW nl O fl Simpb O5.nnerti0n to CMS. os 0 0 0 0 0 0.00 003 0.00 Om _ (Spec all t.c.To Snl emended Finer Path asper SO 0 0 0 0 a 0.00 0.00 000 0.m specifications(en sting CAl soils)Open IN) z tl.To Dry WH`Orrrends Orlin a; So 0 0 0 0 25 000 0.00 000 000 Mo N ion P1(6r R1 o Dry Wag or French Ora an m, 0 l e 0 0 0 zs 000 rem Om 0.00to-Mnnmbn.1We 1 wi 11.To Pain Garden . 0 0 0 0 25 0.0.000.m OW 0.00aro.Doretenti00m el 0lI Isar OW le.To Paw Garden ei' SO 0 0 0 0 50 0.00 am Om 000 Mk.9brawnt en RD...1 z.h.lo IIN'.Her Mane...)Spec PQ 0 0 0 0 0 0 000 0.W Om 0.m 2.1 To Storrnwater Planter. unan Bcretentbn l5Per es.Amen 0l a0 0 0 0 0 zS am 0.00 0.00 O W 3.Permeable Pavement(RRI Bose[lemma*Pavement R0(SPe0n) 45 0 0 0 0 zs 0.00 Om 0.00 0.00 3.6.Peeabk Pavement R(00.0 en )5 `, $.„c a 0 0 rm am O.m OW G Grass Channel(RR) c.a.Grass Channel e/R sonNem.) m 0 0 0 0 is aW 0.00 0.00 0.00 P.p.Grass Channel OAS spits(Spec P31 le 0 0 0 0 15 0.60 0.00 Om Om ar.Gras Channel enh Compost AmemdN Sells, 0 0 Om ono O O. 0. as per per specs(see Nl 10 a o LS S.Dry Swale(PP I S.a.Ors Sy*111(Spec SIM W 0 0 0 0 m am 0.m 0.00 0.00 SA.CM*R MAN R0f 60 0 0 0 0 e0 O.W Om 0.03 000 6.Biorelenuon 01171 6.a. AXeo-Bbratwtl.nRr tl 0 0 0 0 IS am 0.W Om Om euNanmBere enter Nees e9) 6.b.boretenuon; I le Oc n R relenon 00 0.160.6) 0 3,951 Oa MIS 50 0.00 1.63 100 O.tS )Infiltration/RR) ).a.Infiltration in(Spa IN) 50 0 0 zS am O.m 000 0.00 72.In4Nraticn R ,ac ls eel 90 0 0 0 0 25 0.m 0m am 0m 0,Extended Detention Pond(RR) ea tO Sit lsper oils) o a a 0 0 15 am ono Om 0.00 e.dmdz lsoer alsl is a o o p 15 o.m o.m am Om '.Sheetflaw to Filter/Open Spate(RR) 9.a.56eetlbe b.eosewaten men A/B Soils 15 0 0 0 0 0 0.00 0..W DeerR1 OW 0.00 Se S6.lflols to Conservation Nes C/05oN so 0 0 a 0 0 aW ore 000 0.m Noes P31 • 9.r.Sheetfbw to WSere.Finer Slap,ASON Or Compost Amended WC/0 Soils s0 0 0 0 0 0 ow 0.00 0.00 O.m ISN.wage) TOTAL IMPERVIOUS COVER TREATED(at) 0.67 AREA CHECK:ON. TOTAL TURF AREA TREATED(ac) 0.16 AREA CHECK:OK. TOTAL RUNOFF REDUCTION IN Mk B)fll) 1,951 TOTAL PHOSPHORUS AVAILABLE TOR REMOVAL IN D.A.B(lb/yr) 1.53 TOTAL PHOSPHORUS REMOVED WITH RUNOFF REDUCTION PRACTICESIN D.A.B(Ib/yr) 1.38 TOTAL PHOSPHORUS REMAINING AFTER APPLYING RUNOFF REDACTION PRACTICES IN MA.B(Ib/yr) 0.15 SEE WATER QUALITY COMPLIANCE TAB FOR SITE COMPLIANCE CALCULATIONS