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WPO201900060 Assessment - Environmental 2020-03-30
UVA Research Park — Pond 1 Analysis COUNTY OF ALBEMARLE, VIRGINIA VSMP DESIGN CALCULATIONS & NARRATIVE MARCH 27, 2020 TIMMONS GROUP YOUR VISION ACHIEVED THROUGH OUR$. Prepared by: Craig Kotarski, PE Timmons Group 608 Preston Ave, Suite 200 Charlottesville, VA 22903 434.327.1688 0 1 U aWG W. J. KCTARSKI Lic. No. 0402048507 IO 3/ 27/ 20 '$ sSIONAL G� Table of Contents Section Title 1 Project Narrative 2 Approved Plan Sheets (11/03/1997) 3 Survey of Pond (03/20/2020) 4 HydroCAD Report for Asbuilt Pond Tntmduction Pond 1 was originally design in the Approved Site Plan titled "University of Virginia Foundation Research Park at North Fork", dated November 3, 1997 accompanied by the study titled "Stormwater Management / BMP Analysis and Floodplain Study for the UVA Research Park at Northfork" by Dewberry & Davis, October 1997. The pond was designed to provide BMP treatment volume with a permanent pool elevation and water quantity detention through the dam and concrete overflow structure. The design for the pond was revised prior to construction. The record drawings for the revision are not available. In 1998, asbuilt drawings were submitted for the approved 1997 plan but documentation of the changes to the Pond 1 design were not recorded. Data from a survey dated March 20, 2020 was used to model the pond as it was built to compare to the original design to show conformity with the intent of the approved plan. Pond Outfall Anal The existing pond was originally designed to provide water quality and quantity storage with the use of an earthen embankment, and a concrete spillway. The asbuilt pond includes 2 9'x10' culverts, a concrete control structure, and an earthen emergency spillway. The asbuilt pond with the ultimate offsite drainage area and fully developed onsite drainage areas was analyzed using HydroCAD software to determine that the asbuilt pond meets or exceeds the freeboard of the original design. Below is a table comparing the design and asbuilt Water Surface Elevation (WSE), the freeboard provided, and the flow in and out of the facility. 1997 Design* Top of Dam: 464.2 ft 2020 Asbuilt Top of Dam: 467.0 ft 2 yr WSE 454.4 ft 456.6 ft 10 yr WSE 457.5 ft 458.3 ft 100 yr WSE 460.4 ft 460.6 ft 2 yr Freeboard 9.9 ft 10.4 ft 10 yr Freeboard 6.8 ft 8.7 ft 100 yr Freeboard 3.8 ft 6.4 ft 2 yr Peak Inflow 1483 cfs 1531 cfs 10 yr Peak Inflow 2472 cfs 2623 cfs 100 yr Peak Inflow 3708 cfs 4687 cfs 2 yr Peak Discharge 636 cfs 861 cfs 10 yr Peak Discharge 1483 cfs 1966 cfs 100 yr Peak Discharge 2437 cfs 3891 cfs Table 1 — Pond 1 Comparison * 1997 Design values were converted from meters to feet and m3/s to cfs Relevant pages from the approved design are provided in the appendix. The WSE can be found on page 9 of 60 and 32 of 60. The HEC-1 routing of the designed pond can be found in section 8 of the report. Also provided, is the survey dated March 20,2020 that was used to model the pond as it was constructed. Pond 1 was modeled utilizing the ultimate development offsite and post -developed conditions onsite drainage areas from the approved design report. Sub basins C1, C2, D1, D2, E1, E2, F1, F2, G1, and G2 drain to pond 1. The drainage area, CN Values, and time of concentration values are listed in the table below. Approved Drainage Areas and CN Values 7/23/1997 Area (Ac.) CN Tc (min) C1 27.38 80 5 C2 85.84 82 5 D1 12.33 78 5 D2 84.03 86 7 E1 27.8 81 6 E2 17.28 83 8 F1 66.44 91 11 F2 31.64 91 8 G1 48.9 92 14 G2 49.05 92 14 Table 2 — Drainage Areas to Pond 1 The water quality design of Pond 1 was not verified. The BMP volume provided in the original design was through water retained in the permanent pool. This is unaffected by the change in the outlet structure of the pond as the new overflow structure invert is above the permanent pool elevation. Conclusion Although the pond that was constructed was revised from the original design, Pond 1 meets the intent of the approved design to provide water quality storage volume and detain the 2-, 10-, and 100-year storm events for the ultimate build out of the upstream areas with adequate freeboard. _ MATCH LINE SEE SHEET 7 ' FUTURE PARCEL F R I _ Q. , 7��L— LCG4TION FXIS 4 I '� 1 - �_ u1. _ +- -.• rs-`,F«v', _ _mLi �. ems _ �„�. .'Z_y TAR-�FQ'EWBSMU Sr REDS r l rim - -tea E7,...> -G,�� e �zcm•-�1 �Y-�- '�` I� s ����1 �' ���'; t I = MOTION CONTR oa aX INDUSTRIES IN C E R D.B. 1514 PG 560 � l)1= iJ PI A cw,t s 1 U.E P &n {�QiA Isik fU) TA%MAN A �� - f 9ktd1 621a �3 n 4 RIP Yrl v� 1 w � a)Illllf�l /�_-r','-�'', f '4 MICROAIRE SURGICAL / w, INSTRUMENTS. INC. �� J 1 D.P. AP PG ' . 'c TAX MAP 32-19C / / ,�' IT �/ {�G✓ �1 � ' C`— � � I ' � w k q 1 r e I r / x FUTURE PARCEL POND ER4 mi.y, 1 B �v. � 11 ' a Y£AR Eiev I38 as � II I i� / I_r T FUTURE PARCELlea YFAAR fife, - Ino.�A r i I F-2 J/' i dlnr s[�geir }t JUL 1 4199e i s MATCH LINE SEE SHEET 12 ' I RGRAPHIC SCATT EV.GRAOiNGfaRStANEDES'G`1 aD 1a.1 .. 1D RfV. 6-) t CCr3 t0 LG-61 GG-3 11 M 4 RESPECTIVELY. NO l - ATE OEEIENBR Ne. llESCRiPTION UV' APPRt1VEa OATB OBI33 ,vo. onrE acscarvnav er RT SHEET INDEX NORTH ' N.TS. — REV1— ENGINEER REVISNN AP�R6VE9 BY: NORTH 111 - ENGINEEPS sSU. h MATCH LINE SEE SHEET 10 - d v, z_ ET 1.14 rc T uRrx vnwE Rw'D. _ ty a. - _ - (sEE sxEErz FAR DEruE - - ,iy 6 m 18 54 lilt 5H1 r� f EEO OEUNE -- � V A 1111s ARE4 CLFARIN6 OF VEGET / /� _ BE PERORMED W H�7 D TO �rwaFDN��mf 4 -- -- U o d POND 1 _ - H �o / y _ -- a POND 1 F+ - _. 4�, /�°b i i/ se JUL 1 a 1998 m — _ NO" i ; 0 BENNY- -soa MATCH LINE SEE SHEET 12 is 6 5� 1 vlen Numbe. GRAPHIC -SCALE e PD-IP SHEETINDEX - NORTH T - 's q e,6O NTS. ENDINEER FErS510N APPROVED BY File Number. p ENcmeeas sEu. x ucnAnmE MAN-PP260 IX WEi POND \ ` I, \ \ > 1: V SHEET INDEX NT.E. DARE DESIGNER ND. DE9CROTION By PPPROVEO DATE ENG¢VEER E6M1'pION APPROVED BY MATCH LINE SEE SHFFT 9 - POND 1 (POND "C) \� fAR EiV. 3849 YFAR ELEV. s 3944 /� / rr or n?sa ' '- 4 J aD GRAPHIC SCALE (m Nereis ) NORTH 1 500 �.Eoa 12�Ib01 r a0 31 MS P50 I ao�� =yo° Pw_5I�0 y ; :POrA4I �O��l1tIIIP �LaNSsUTa�K I "NTa-Ll� iDELS.]I �L � atEI o Mrr Efe{TEPERtt -L E� G�ROroEYEoI DFlr-F_Cf� _oEAaRECnqN ERW55A aR eHJ II III j' O T C. W 145 145 ) -MN 140 140 140 TD STG uOE 135 130 130 excwoE2Esewswses�5TecunsH�.F(wnvY��casB]Gn'a�ruse D1Q"$�FrVN�Wj•ea�IAF�L IVoCw�3aceoE-MI a1iRR h 3 z>aa'�nF::Q�xEQS- ,W�e9I y x qe it�dw .«o 30 040 0fi60 Ot70 080 11010�020 9 xo 145145 TPaDws 140 140 135 135 13030 JULJ14 i"amvrs 0+00 0+10 0+20 0+30 0+40 0+50 0+60 0+70 0+80 0+q0 1+00 1+10 1+20 DAM PROFILE pD-IP -L32.( 7oo G MAN-PP260 - I.£m WIDTH) SPILLWAY 0.4n ' ELEV.=13O.E0 m EOTFOM DF BASIN CHUTE BLOCK DETAIL PLAN VIEW 0.3m 03 m TOP OF pN'I = FNI.5 I.0 ' CG}lC. BASE LDROW CHANNEL ELEVATION aEY.=I3D 5D BAFFLE PIER DETAIL Fla.=131.50- uuNNa BGTTaT RIP -RAP (2�1 5lOPE) - EL£V.=13150 �i. I FIA>_J �E 1•% 0]Rn ELEV.=13U &1 1.4Vn END SILL DETAIL e-� SPILLWAY DETAIL N.T.S. NOTE, A SAFETY wAalrG t5 TO BE F—DED ON THE STRUCTURAL DRAWINGS FOR TIE -I—AY CN POND CI. TOP OF EMBANKMENT/SPILiNAY 57M URE CA TOP OF GORE MIN. I.Em WIDE SQLLCW GE BPNICAL REDDIREMDTS REGARDING ETTLEMENT-AVNPROCEDURES. - SP LLWAY PABRIBEIUTITl ON 5EE SEPARATE STRUCTURAL -MIN,O.s++ABONE DESIGN POJE aEV. ,.DETAILS - BLANKET ORAIN/tOE DRAIN ELEV. I41.5 rAl _ ARFA sEE GEOTF.CW3ILAL SPECIFICAT-E; _ OPC5EE DAM LL OR FACE _ 1 TICN AND EXTENT TO BE F BY GEOFECHNICAL w — FURNISHED F, ENGINEER. S•, 9-� 5CHDIATIC WEATHERED ROCK SURFACE EX. GRADE ` - __ - '. P£PVIDUS"STBdRlIA5'REDTD. - PROIG-£D CORE/CUTOFF TRENCH � IMPD2V WS STRATUM/R(%K BOTTG'i OF OGRE - NOTE I. FOR —IBCRE GEOTECHNICAL DJIREMEW5, SEE SHEET 35. - _ _ •' -MIN. 12'(3.66m) WIDE -£%TEND BELLW E%. GRal 2. CRC55 SFLiI('A1 IS SCHEDEP ACTUAL FIELD A` W _ - ' . MIN. (03m) INTO WEATHERED RCCK1 OR TO HARD RClX CWDRITIR WILL VARY DEPENDING ON MATERIALS E.Ll TIRED AND THEIR LOCATION ALL WORK f^ll (\ 0 0E —A— -CN,, GYK CGNTI. SHALL BE PERFORMED UNDER THE FULL-TIME T1K ENT ND TREATED PRIOR TD ,cCRE PLATI— IN ACCORDANCE WITH RBCOMMENpATIg15 ENGNEIATNJN AND E, IN pJ OF THE GEOTECNNICAL ENGINEER OF ftECORO N ACCORDANCE WIIN THE - OF THE GEOTECIWICAL EMG[NEEROF RECGRD. PROJECT GEOTECHNICAL SPEC FCATIONS. TYPICAL EARTH DAM CROSS SECT.,ION A -A a zF ow POND 41 DRAWDONN, PIPE PRSNTED JUL T a was DEWBERRY A DAVIS Nwrili,r !,tlem, Pleu PD-I331,E60 711 ISBN. 5 SIGNATURE MAN-PP260 FAR PHASE 11NFRASTRUCTURE NORTH FORK BUSINESS PARK ALBEMAUL COUNTY, VIRGINIA F&R Na.%-I-IM GEOTECHNICAl SPECIFICATIO S The i ll g g h- p - s nave been devel pef ( FAR, S n E.pl d Gedlech - E g g Ev aluafon report N X —95, d ed U b 27, 1996Th' p d I!, —pelf h bee flenh,w 61h, ID o finil it, pl prep ed by D cab ry & D W (h. I Ph I f P- h' M1 In,y hid. nfo g g ubsu dam exploral. p d, -I d' b _ d dd of — nnni,ndainn, may be Faund In ou g. rh 1 p Thee geotahnlcal Wec ficaTons meted,specrfc gedIlin th t address thn, gen rat s1. preparation and roadt+ay ill as well as the conzbutt on of the srornwa er nina n-n Ponds at- Ihe s to ROADWAYS General S- = P y= ar�at oU t. All zurfcal—nia wls shad) — ed[ d' f 5 1--d,, of d ve fill—P, as follow, Where B'8 wfill I,rege,td to achee The Tel sal sub d - d areas the 01i ng f - IS-1 Ill > be III in Plam, he.vever add' rg 'I shall nut he add+d All stumpetS laie, i II b moved. Organrc sold may be ylac�d as ill a, me s„nace,'e theempak pes ouend of h oadway shoulders. 2. Pohl to placement of new till pmoi:dl- g n f r the v rgn so to'tl¢n h sofi-spots shallbeperfarmW. Theproofroll'rgsf adb P.F mJ drtheobservaron or the GFI-1,111al Eng neer The a tg ne h II k o , case by case bds s concerning areas whchw ry tor d& Ill d . d after several passes ofthe pmofroller. Oplmns—Id'nclude br dg ng son syl .uhgrade'mprovenan,, or uTdercu to firmer so Is. Any undercut areas shall oe back TI d.-.0 thin'n h my p d FII ne,,hats Prnofroll'ng shall ,It be aetemped in r M1 n he ve -11 el 11.151- z�;h—rls and 1-11, add, ... I ,nd h i,'Tic snail T. 4 Iwed eo cancer v e' fu ere P or snucw al y sazth s co Id d I ate the .o Is. S FAR B. Wh p g -I dl h r d Y'll bll k d IIb - s IW II g cle g dg b gI dph f2f fVDOTN I ee, hRb pl ,e ITb he d f g p . l,T1' dphbt, be hed G echn'cal Eniii— of record. The bl ken dra n shal'.I ¢etend below snY fill t 11, ed,e of the ill -,be, k,n— Standard YOOf finer fabric sha 11 be plied orer the -7 ,one pror In pl F 'I fill sha— Ell Place nth and Comoaeeol 1. Pror to 1—e l if Frll samples f `-i b d as f II shall be suhmme! to hit,Gmtechncal Engneer of record for g' d—1 h - pl "y and —pew, th I St1pl11h1(1b—b,,iRdlIi%7d,y,p o f The ruse as Tll Pf h m y h b n pertprmed durng thg Ialluaz on p•ocess Prev, ly d--I yr II d 1 h tested. - 2.TM1 1 - SILT SAN) and fat CLAY(C T 'h rh I. CBR lees end geneally ar 1 d ble for Dye,— phri CH I,iH eni in,, -hI, are to be placed ill p.bl d pf11 d pd h ftw g tar ill I L I) h p. bg d el 3 P IC W h d Rock g Ily b ed h e ff Try by w h niti'g eq p bn, Ily th, 11 If Appn,g -11. KMIbl g y b qlintito f h n a rsunt Part a ly M h ed F k. Blenin9II1InIIktIY bitnti,h.d and y b dea remo+e burg comp k up ec t. I Elinin, A P n ally W d alhered Rock nay be. d III F it 6 k d 'n,o ' able cad when vaeed or when compacted w th a sn Afoot roller En Id 0,116s ach m d'ametef shall not be placed in h pp p fee f ill If ge tlaa bf b elders be p3 ceti n Ih d yfil thit, hib e, pl ice. d (IN -fill wth lalmr ofg 'I ? el" N f 40N duv t pl db h bo Id d b III hove Bo Id nd g II 1 P '1) 1 - y be d thou, restr a the our er lay T oadway emb kn ni ITT he im edtely bet Ihe roadway. i R d y ill h II be placed and compacted it i, ordance wgn the cprren VOOT R ad and Br dge Iii-f cat e - fs�R SWM POND EMBANKMENTS - General Sit, t F d N 1 rd -M1 h Ihe 1 C yE dt- I C I O d' Ind ih 'l I bi 1-111d v t€ 01, pot d 2. Areas dasgnaled hh,,d g pl F b ba k d al h II be cl¢aaed grubbed e —d i IkriS -1 Th p 'I Y p kp led f p I tie embankmem andoih Tn pd hllb ad i II: es, brush end ebSle,' All organ c aliwum ill.II b etN 3 All work on pod M1 11 b - I, I f Temp any d Ses, levees, cofferdams, dra page h d, and stye m diVe s ohs may he ry E b k C n iu 1 A cur IT Trench sh rI b to b I h IT N SWM Pond a tlivinrer Is The rui oif h 'hill ed ghi,- f h tl Th If hl SW cad n ll d dph F S'F b i Th g gr d f f 1[ n ed ck n ( Th d k- h n f Th H f h5 H_ P d 53 hill - d dip h f A F b l Ih g g d- f I ' Ily h ed. k h f f a d k h' h i Tn b f rh ff enches shall be 12 ifie id,Th in. p f eff nI, shall be t uc,etl aT a slope f Ra P b k'll g h f h the trenches are to b b ed by NeG IEg d Cu[ B h n"Ila+eb killed 'h h f 'cbhes ve CH, MH,o lsIN, oemed by the .it ngs The malprty If hi, oneit- IJ, at the s II — m In= a pe h llznn of IRe ..,Ideal mii, 2 Th f ach If h $w d h II b b ed f. h mhil ve CH, NIT, or Cl. d -'i dn) th. .f Ibo g. p t h f n 5WM Wade sh Il. be d! 5 A tl dd S O Y bo - itd 8 P I Th es shall extend h v I g n I- €11d lh h II nd downward at a slope e L T d V), br p t n ,I they reach the trng ground sur ace 1, The shells of ine BwM Phnd ermb nk e Is N,.hUe ,f the c rest may be m tted o robes ron so S So"Is rnii,, shall_ not ne used in the 0- B h p 1; dt b ple,,J U, r tht i,d,,dow file lam nd to ih, va{ o T aF Ihe so pool on theup rea b lace. FAR sW d h k ill ha11� pl d 1 i TIT 1 jd h (- p AI. l Il h ill b p"ed' h i Igl Y�S BWf�gp d (nba k Tl i fl h l b d - I.,h f 9 f d li p IA$TM §99N f d,y d y G {II h II pl d yG _ (0 II 5b'E d �g .:rll hep dnyh Ggt fib -.I kpB Ct f dd Il ill plaF N III II M1b p ed ll4 h R l2 dd fired h gthe raywred he,thdn The fill b-kp d II "EdIAtly t - ! �S B Mpod 4 k JII Ihdll be Pi SWh F I h h- I }d c I g - hall b tied on qP 4f h b -km It11 pei cd 3 eels aver it Rleaon of ill pl o Ilosv -'T ajd'ty f he I 1. Clq Abl k. dan hllb o (It£din thIe 6 k -t ilSWMf d ITb lS f.P 1d ,12 Th b1 k.J nik g8 p f h - I Jp: Tn bl k d n I;b p'Sfi t h C IIb pped I ly g ! fl F -fb (MfOOX q 1 )^[SWA qPi M1g Ifb bB1 pl d Th in k„ d h l t d g h rrlb k ft- d ThI .,d rn Wk 444 2A d hlIE p, dlNh bk SNMPdd 1'd2 h a l b l ed p p [ n k f i n b e L y IIp6 I ,r, l gh hp h k Th d P halL i d_RI "d dT de.p Th d.'. nlin I d. dan no he baSi•" 1 I SWMP dS.1 M. dnee,it BIAMP d? 3 Th Ape d) Snell �h rued II dT I d f g h f h p I( ur§ fi b II b s p d dl d W h d g F perTd Th e Sh'il. IT lk7 1 p pe rt II d d g big k s g Y 11 oundm ny afilnt, let. tralpp ro J� Peg.; r f J ) IT 4 Concrete Cradle II— �p3 tF �i D !i! ! ! Hut mt�len`�m ss_ 11 FaR , R g5� NOTE: � f THIS SIl&I;.T FOR GEO,TECITNICAL REQUIREMENTS ONLY! x REFER TO REPORT BY FROEHLING & �4 L ROBERTSON, INC; DATED OCTOBER 27, .1997 FOR SPECIFIC GUIDELINES THAT ADDRESS � THE GENERAL SITE PREPARATION, UTILITY �' w WORN AND ROADWAY CUT AND FILL AS WELd, �$ THE CONSTRUCTION OF THE STOI7IXIWATER MANAGEMENT PONDS. THE CONTRACTOR SHALL PERFORM ALL WORKr, WORIN ACCORDANCE WIT[I THE RECOMNIENDATIONSi�ANDGEOTECUNICAF, _ it SPECIFICATIONS OF F14ECEOFECHNICAL ENGINEER Ol' RECORD, INCLUDING ROUTINE INSPECTION AND TESTING OF ALL WORK-THROLGHOUTiCONSTRUC<TION BY D5wwl 1 41996 THE GEOTECIINIL AL ENGINEEROF RECORD. j pn 1 a ;y rB.. �rve^ 3 9AIE MM11,11 Si➢e DATE DESCRIPTION BY , MAC FIT _�,wG 0 0 O 45�e� �452.39 C/ EOW1 452.44 0 EOW1 I I I �-452.51 EOW1 52 -452.55 EOW1 E w1 \�� 4 5 LON 0 EOW1 452.55 EOW1 EOW" DENOTES EDGE OF WATER AS SURVEYED 0212612020 IN .04 X :4674 746� 466. 467.1-6 7 < 7.44 x 13 \ 467.81 453.05 n � i X 467.76 :-467.51 456.68 57,Z8_ 797 X 46724 hF� X 4 X \.371 X �f 467.48 \ X 467.60 153.93 X 453.30 453.00 1452.60 4 8 452.61 EOWI EOW L-452.42452.65 4 5.9 EOWI i EOW 452.41 EOW1 EOW1 452.65 � � X 40////3.74� EOW / X 455. 45 ff 41, 6� .3 X 67.32 \ X 61. 0 467.30 x \ \\ \ 5 X7 467.27 452.49 7 OW1 \ / 452.53 EOW1 4 70 -SEE SHEET 2 OF 2 2. 8 FOR SPILLWAYDETAIL 452.66 EOW 45 82 \ 452.44 X 6 I'POND V EOW1 4 .s 45 .44 452.70 EO 1 EOW 4 452.50 EOW I 2. 452.59 45.83 EOW 452.59 EOW1 5 2. 452.55 EOW1 x E452.65 452.46 / OEOW1 EOW1 458.3 457.7 x 452.47 x EOW1 452.49 EOW1 / 52.4 452.52 EOW1 EOW1 � 452.49 Z EOW1 452.46 EOW1 - SCALE 1 "=20' NOR 0 20' 40' / 452:56 FnW1 X 431.26 CLC X 46 5 18 X 433. 0 433.087 431.8 EOWT 448.98 X 4 31.97 / 4' 431.40� / 433.98 431.39 432.40 EOW TOE CLC 437 33 434' 144 432.70 CLD X 433.97 1433.35 E0433 434.7 X 433.30 X 432.92 432.74 4"PV 3 .* > INV. = 434. 1' CL � 434.21 � CLC \ (2) 9' X 10' CUL T 433.74 INV. = 434.52' 433 7 C 4" PVC 433.46 INV. = 434.9 '�433.14 36.52 X45 X 467.37 467.8 468 e L 1 x 459.5 x 45 QW TOE /X 435.28 76 43701 / X E4 "CLC" DE OTES CEN ERLIN CREEKAS SURVEYED 0212612026 O �� 31.81 C 432.77 EO TOE 286 nX 06.53 435.04 4 �o X12 X 436.67 X 440.70 11 441 e3 l? SURVEY NOTES : 1. HORIZONTAL DATUM IS BASED ON NAD83 (2011), SPCS VA S. VERTICAL DATUM IS BASED ON NAVD88. DATUM ESTABLISHED BY GPS R TK OBSER VA TIONS VIA LEICA SmartNET. 2. SPOT ELEVATIONS SHOWN HEREON FROM GROUND SURVEY OF EMBANKMENT AND OUTFALL CROSS -SECTIONS, EDGE OF WATER LOCATION AD SPILL WAY STRUCTURE AS -BOIL T COMPLETED ON AND SPILLWAY STRUCTURE SURVEY COMPLETED ON FEBRUARY26, 2020. CONTOURS (TOPOGRAPHY) DEPICTED HEREON IS BASED ON AN AERIAL PHOTO AND LIDAR CAPTURE OF SITE BY KUCERA INTERNATIONAL, INC. ON OCTOBER 18, 2018. 3. THIS IS NOT A BOUNDARY SURVEY. NO TITLE REPORT FURNISHED, EASEMENTS MAY EXIST WHICH ARE NOT SHOWN HEREON. 4. SUBJECT PARCEL IS REFERENCED AS TAX MAP PARCEL 32-6R PER GIS INFORMATION FOR ALBEMARLE COUNTY, VIRGINIA. EXISTING CONDITIONS SHOWING POND #1 DAM AND SPILLWAY FEATURES ON THE LANDS OF UNIVERSITY OF VIRGINIA FOUNDATION (PORTION OF) TAX MAP PARCEL 32-6R IN THE COUNTY OF ALBEMARLE, VIRGINIA RIO MAGISTERIAL DISTRICT ALBEMARLE COUNTY Rio Magisterial Dist. Date: March 20, 2020 Scale: 1 " = 20' Sheet 1 of 2 J. N.: 44493 Drawn by: KLC Checked by: JCM E a U V) C of w v I- N � Q W > ov wm 000 U. � r, Qu- C:o a O � ui aOcno0o zZ (1) ,It ��.Loo < X F, w (1)o = am o 00 Ln N 00 W 0 It Ln J w H 1S 2S 3S 4S 5S gS 7S (8S) (9S) 10S 000 O c1 Pond 1 Subcat Reach on Link G2 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 2 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment1S: C1 Runoff Area=27.380 ac 0.00% Impervious Runoff Depth>1.78" Tc=5.0 min CN=80 Runoff=87.76 cfs 4.058 of Subcatchment2S: C2 Runoff Area=85.840 ac 0.00% Impervious Runoff Depth>1.93" Tc=5.0 min CN=82 Runoff=297.54 cfs 13.809 of Subcatchment3S: D1 Runoff Area=12.330 ac 0.00% Impervious Runoff Depth>1.63" Tc=5.0 min CN=78 Runoff=36.36 cfs 1.679 of Subcatchment4S: D2 Runoff Area=84.030 ac 0.00% Impervious Runoff Depth>2.26" Tc=7.0 min CN=86 Runoff=315.43 cfs 15.793 of Subcatchment5S: E1 Runoff Area=27.800 ac 0.00% Impervious Runoff Depth>1.85" Tc=6.0 min CN=81 Runoff=88.77 cfs 4.293 of Subcatchment6S: E2 Runoff Area=17.280 ac 0.00% Impervious Runoff Depth>2.01" Tc=8.0 min CN=83 Runoff=56.63 cfs 2.891 of Subcatchment7S: F1 Runoff Area=66.440 ac 0.00% Impervious Runoff Depth>2.71" Tc=11.0 min CN=91 Runoff=253.45 cfs 14.984 of Subcatchment8S: F2 Runoff Area=31.640 ac 0.00% Impervious Runoff Depth>2.71" Tc=8.0 min CN=91 Runoff=133.88 cfs 7.140 of Subcatchment9S: G1 Runoff Area=48.900 ac 0.00% Impervious Runoff Depth>2.80" Tc=14.0 min CN=92 Runoff=175.55 cfs 11.418 of Subcatchment10S: G2 Runoff Area=49.050 ac 0.00% Impervious Runoff Depth>2.80" Tc=14.0 min CN=92 Runoff=176.09 cfs 11.453 of Pond 4P: Pond 1 Peak Elev=456.61' Storage=929,533 cf Inflow=1,530.57 cfs 87.518 of Outflow=860.93 cfs 87.361 of Total Runoff Area = 450.690 ac Runoff Volume = 87.518 of Average Runoff Depth = 2.33" 100.00% Pervious = 450.690 ac 0.00% Impervious = 0.000 ac Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 3 Summary for Subcatchment 1S: C1 [49] Hint: Tc<2dt may require smaller dt Runoff = 87.76 cfs @ 11.96 hrs, Volume= 4.058 af, Depth> 1.78" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 27.380 80 27.380 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: C1 95 Hydrograph ■Runoff _ I_ _ _ _I _ _ I_ — — — — — — — — — _ _ _I _ _ _ _I _ — — — — — 90 85 ! _ I_ _ _ _1 _ _ 87.76 cfs i_ _ 1 -i - -I - i--1TYpe-1l-1-4hr 80 I I I I I I Rlainfall i ��$w 75 — I— — — —I — — I— _ _I — I— _ _ _ — — 70 — I— — — —I — — I— Ruhoff A-r6&2T1.3M -ad 65 1 ��— �Ip- IBun6ff Vvl_61_llLC�4.058— 60 —1 w 55 I I I I I I I I I I_ I I I Im I ff I pI oh I 1JQlu u 50 - I- - I - -I - - I_ . I _ I - L ? - - — — I- - - 1 _1 a 45 1 1 1 L 1 L J 1 1 1 1 L 1 L-1 I TC-0510-Mih LL 40 35 — -1 I— —I— I 1 —I I L 1 — — L -1 I— —I 1— 1 1 _I— —I — I— — I_ _I— 1 I I 1 L 1 L- 1 1 1 1*8Q 30 -J — I— 1 — I — L —1 — L J — I— 1 —1 —1— L —1 — L -i — I— 1 — I — L —1 — L 25 -J—I-1—I—L-1—L-1 1-1 —1—L-1—L-i—I-1—I—L-1—L 20 -1 11 I L-1 L-1 L1 1 1 L-1 LA I I I L-1 L 15 -1 I 1 I L _1 L-1 1 L I I L 1 L A I_ 1 I L 1 L 10 J I_ 1 I L _I L- 1_ 1 1 L _I L! I L _I L 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Existing Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 4 Hydrograph for Subcatchment 1S: Cl Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.00 0.00 8.50 0.49 0.00 0.00 8.75 0.51 0.00 0.01 9.00 0.54 0.00 0.08 9.25 0.57 0.00 0.15 9.50 0.60 0.00 0.22 9.75 0.63 0.01 0.32 10.00 0.67 0.01 0.45 10.25 0.71 0.02 0.62 10.50 0.75 0.02 0.84 10.75 0.80 0.03 1.17 11.00 0.86 0.05 1.60 11.25 0.94 0.07 2.39 11.50 1.04 0.10 3.54 11.75 1.42 0.25 22.24 12.00 2.44 0.85 77.21 12.25 2.60 0.96 11.49 12.50 2.70 1.03 7.59 12.75 2.78 1.09 5.74 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.13 4.83 13.25 2.89 1.17 4.21 13.50 2.94 1.21 3.71 13.75 2.98 1.24 3.30 14.00 3.02 1.26 2.94 14.25 3.05 1.29 2.74 14.50 3.08 1.31 2.62 14.75 3.11 1.33 2.49 15.00 3.14 1.36 2.37 15.25 3.17 1.38 2.24 15.50 3.19 1.40 2.11 15.75 3.22 1.41 1.98 16.00 3.24 1.43 1.85 16.25 3.26 1.45 1.77 16.50 3.28 1.46 1.73 16.75 3.30 1.48 1.68 17.00 3.32 1.49 1.64 17.25 3.34 1.51 1.59 17.50 3.36 1.52 1.54 17.75 3.37 1.54 1.50 18.00 3.39 1.55 1.45 18.25 3.41 1.56 1.40 18.50 3.42 1.57 1.35 18.75 3.44 1.59 1.31 19.00 3.45 1.60 1.26 19.25 3.46 1.61 1.21 19.50 3.48 1.62 1.16 19.75 3.49 1.63 1.11 20.00 3.50 1.64 1.06 20.25 3.52 1.65 1.04 20.50 3.53 1.66 1.03 20.75 3.54 1.67 1.02 21.00 3.55 1.68 1.02 21.25 3.56 1.69 1.01 21.50 3.57 1.69 1.00 21.75 3.58 1.70 0.99 22.00 3.60 1.71 0.98 22.25 3.61 1.72 0.97 22.50 3.62 1.73 0.96 22.75 3.63 1.74 0.95 23.00 3.64 1.75 0.94 23.25 3.65 1.76 0.93 23.50 3.66 1.76 0.92 23.75 3.67 1.77 0.91 24.00 3.68 1.78 0.90 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 2S: C2 [49] Hint: Tc<2dt may require smaller dt Runoff = 297.54 cfs @ 11.96 hrs, Volume= 13.809 af, Depth> 1.93" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 85.840 82 85.840 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, I Subcatchment 2S: C2 Hydrograph I I I I 295 �-1-�1r�rrt1r -I - I- rt -I - r -1 - I- -r - I - -r -1 +-1-+1+-41+1 -1 1-1 1 L- I 11 1 7 -1 - -I 1 ype l l 2 -h r 7 M" - 2'1YP F0ai'11n411* 6$'1'F Run-off Area=8!5 MO at ncoif'Vq1 u 'ne--j. -af I I ' Rdnbff Np�th�1 !93" -I - I- -r - I - 1- -1 - I- rt - 1- 7 - -4 1 + 1 t- --� Tcr-&O in- -1 1 + 1 L -1 - I I I I I I I I I I I I I I I I I I I I I 1 1 7 1 1 1- + - 1— + -1 - 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 6 Hydrograph for Subcatchment 2S: C2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.00 0.12 8.50 0.49 0.00 0.30 8.75 0.51 0.00 0.52 9.00 0.54 0.00 0.79 9.25 0.57 0.01 1.05 9.50 0.60 0.01 1.28 9.75 0.63 0.02 1.63 10.00 0.67 0.02 2.11 10.25 0.71 0.03 2.77 10.50 0.75 0.04 3.58 10.75 0.80 0.05 4.78 11.00 0.86 0.07 6.32 11.25 0.94 0.09 9.18 11.50 1.04 0.13 13.26 11.75 1.42 0.31 79.55 12.00 2.44 0.95 259.93 12.25 2.60 1.07 38.20 12.50 2.70 1.15 25.15 12.75 2.78 1.21 18.97 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.25 15.95 13.25 2.89 1.30 13.88 13.50 2.94 1.33 12.22 13.75 2.98 1.36 10.88 14.00 3.02 1.39 9.67 14.25 3.05 1.42 9.01 14.50 3.08 1.44 8.60 14.75 3.11 1.47 8.19 15.00 3.14 1.49 7.77 15.25 3.17 1.51 7.34 15.50 3.19 1.53 6.91 15.75 3.22 1.55 6.48 16.00 3.24 1.57 6.05 16.25 3.26 1.59 5.81 16.50 3.28 1.60 5.66 16.75 3.30 1.62 5.51 17.00 3.32 1.63 5.35 17.25 3.34 1.65 5.20 17.50 3.36 1.66 5.05 17.75 3.37 1.68 4.89 18.00 3.39 1.69 4.74 18.25 3.41 1.70 4.58 18.50 3.42 1.72 4.42 18.75 3.44 1.73 4.27 19.00 3.45 1.74 4.11 19.25 3.46 1.75 3.95 19.50 3.48 1.76 3.79 19.75 3.49 1.78 3.63 20.00 3.50 1.79 3.47 20.25 3.52 1.80 3.40 20.50 3.53 1.80 3.37 20.75 3.54 1.81 3.34 21.00 3.55 1.82 3.31 21.25 3.56 1.83 3.28 21.50 3.57 1.84 3.25 21.75 3.58 1.85 3.22 22.00 3.60 1.86 3.19 22.25 3.61 1.87 3.16 22.50 3.62 1.88 3.13 22.75 3.63 1.89 3.10 23.00 3.64 1.90 3.07 23.25 3.65 1.91 3.04 23.50 3.66 1.92 3.00 23.75 3.67 1.92 2.97 24.00 3.68 1.93 2.93 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 3S: D1 [49] Hint: Tc<2dt may require smaller dt Runoff = 36.36 cfs @ 11.96 hrs, Volume= 1.679 af, Depth> 1.63" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 12.330 78 12.330 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 3S: D1 Hydrograph — I— —1— 4- —1 — --A — i— —I— T —I— —1 — - — 1— —I— —1 — 40 1 4 1 1 � —I— 1 1 - 1 1 1 ■Runoff 38 - — 1— 4 —1— 4- —1 --A — 1— -1 36.36 cfs —1 — 4- —1 — - — 1-4--1 — 4- —11 — 36 --t--fi--��-I-fi-I --t--��/�-1Type-I�F24-hr 34 fi fi 1 fi -�j 32 30 rt - rt -1 RuKoff-Arda-i:fiZ.339 adc 28 - I- T I T 1- T-- 1- T -I -I T 1 F-1 I T I T 1 26 - 1- 7 - I - T -1 - 7 - - 1- 7 - I - IRuunoffrVotume=t.6T9-af u 22 _ I_ _I_ I I _I _ I _ I_ _I I I1I �_c7�� `f D`Ip' p�� 18 I I I I I I I I TC#5i � -h11 h1 LL 16 -I- -I- -I- -I- -I -I- -I- I- -I- /�1��tt1 1 12 10 g_I_ gIII II II 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Existing Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 3S: D1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.00 0.00 8.50 0.49 0.00 0.00 8.75 0.51 0.00 0.00 9.00 0.54 0.00 0.00 9.25 0.57 0.00 0.00 9.50 0.60 0.00 0.03 9.75 0.63 0.00 0.06 10.00 0.67 0.00 0.11 10.25 0.71 0.01 0.17 10.50 0.75 0.01 0.26 10.75 0.80 0.02 0.38 11.00 0.86 0.03 0.55 11.25 0.94 0.04 0.85 11.50 1.04 0.07 1.31 11.75 1.42 0.20 8.68 12.00 2.44 0.75 32.22 12.25 2.60 0.85 4.86 12.50 2.70 0.92 3.22 12.75 2.78 0.97 2.44 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.02 2.06 13.25 2.89 1.05 1.79 13.50 2.94 1.09 1.58 13.75 2.98 1.12 1.41 14.00 3.02 1.14 1.26 14.25 3.05 1.17 1.17 14.50 3.08 1.19 1.12 14.75 3.11 1.21 1.07 15.00 3.14 1.23 1.01 15.25 3.17 1.25 0.96 15.50 3.19 1.27 0.90 15.75 3.22 1.29 0.85 16.00 3.24 1.30 0.79 16.25 3.26 1.32 0.76 16.50 3.28 1.33 0.74 16.75 3.30 1.35 0.72 17.00 3.32 1.36 0.70 17.25 3.34 1.37 0.68 17.50 3.36 1.39 0.66 17.75 3.37 1.40 0.64 18.00 3.39 1.41 0.62 18.25 3.41 1.43 0.60 18.50 3.42 1.44 0.58 18.75 3.44 1.45 0.56 19.00 3.45 1.46 0.54 19.25 3.46 1.47 0.52 19.50 3.48 1.48 0.50 19.75 3.49 1.49 0.48 20.00 3.50 1.50 0.46 20.25 3.52 1.51 0.45 20.50 3.53 1.52 0.45 20.75 3.54 1.53 0.44 21.00 3.55 1.54 0.44 21.25 3.56 1.54 0.43 21.50 3.57 1.55 0.43 21.75 3.58 1.56 0.43 22.00 3.60 1.57 0.42 22.25 3.61 1.58 0.42 22.50 3.62 1.59 0.41 22.75 3.63 1.60 0.41 23.00 3.64 1.60 0.41 23.25 3.65 1.61 0.40 23.50 3.66 1.62 0.40 23.75 3.67 1.63 0.39 24.00 3.68 1.64 0.39 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 4S: D2 Runoff = 315.43 cfs @ 11.98 hrs, Volume= 15.793 af, Depth> 2.26" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 84.030 86 84.030 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 Direct Entry, Subcatchment 4S: D2 Hydrograph 340 - - 1 1 - - - 1 1 - - - 1 1 - - - 1 1 1 1 - - - 1 1 1 1 1 1 1 1 1 1 1 - - - - - - - - - - - - - - 320 1 315.43 cfs IType l l -24�-1r 300 280 t1 t 1tt1 1jlfl.i 2Yanu1'�l * 1- -1 -1T I- ' 260 - I- + + RunoffAre-a1=&&M at 240 _k - V I �j I ��n4�pJI_Q1ume-i15,.•�0 0f 220 1 1 1 L-1 L L -I L 1 w 200 v - I- + -I - - + - I- RUnbff Dlapth:62 26'" 180 1 1 1 1 1 1 1 1 _ 11 c�7J� min_ .2160 a 140 120 T" 100 I I I I I I I I I I I I I I I I 80-1-t--�-I- 60-I +---1-1-�-1 40 ----I-�-I- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 10 Hydrograph for Subcatchment 4S: D2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 6.75 0.35 0.00 0.09 7.00 0.36 0.00 0.23 7.25 0.38 0.00 0.37 7.50 0.40 0.00 0.51 7.75 0.42 0.01 0.66 8.00 0.44 0.01 0.81 8.25 0.46 0.01 1.03 8.50 0.49 0.01 1.31 8.75 0.51 0.02 1.64 9.00 0.54 0.03 2.02 9.25 0.57 0.03 2.33 9.50 0.60 0.04 2.57 9.75 0.63 0.05 3.00 10.00 0.67 0.06 3.64 10.25 0.71 0.07 4.48 10.50 0.75 0.09 5.53 10.75 0.80 0.11 6.99 11.00 0.86 0.13 8.89 11.25 0.94 0.17 12.21 11.50 1.04 0.22 17.05 11.75 1.42 0.44 83.34 12.00 2.44 1.19 309.10 12.25 2.60 1.32 46.00 12.50 2.70 1.41 28.94 12.75 2.78 1.47 20.85 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.53 17.53 13.25 2.89 1.57 15.08 13.50 2.94 1.61 13.28 13.75 2.98 1.65 11.77 14.00 3.02 1.68 10.47 14.25 3.05 1.71 9.65 14.50 3.08 1.73 9.20 14.75 3.11 1.76 8.75 15.00 3.14 1.78 8.30 15.25 3.17 1.81 7.84 15.50 3.19 1.83 7.38 15.75 3.22 1.85 6.92 16.00 3.24 1.87 6.45 16.25 3.26 1.89 6.16 16.50 3.28 1.90 6.00 16.75 3.30 1.92 5.83 17.00 3.32 1.94 5.67 17.25 3.34 1.95 5.51 17.50 3.36 1.97 5.34 17.75 3.37 1.99 5.18 18.00 3.39 2.00 5.01 18.25 3.41 2.01 4.84 18.50 3.42 2.03 4.67 18.75 3.44 2.04 4.51 19.00 3.45 2.05 4.34 19.25 3.46 2.07 4.17 19.50 3.48 2.08 4.00 19.75 3.49 2.09 3.83 20.00 3.50 2.10 3.66 20.25 3.52 2.11 3.57 20.50 3.53 2.12 3.54 20.75 3.54 2.13 3.51 21.00 3.55 2.14 3.47 21.25 3.56 2.15 3.44 21.50 3.57 2.16 3.41 21.75 3.58 2.17 3.38 22.00 3.60 2.18 3.34 22.25 3.61 2.19 3.31 22.50 3.62 2.20 3.28 22.75 3.63 2.21 3.24 23.00 3.64 2.22 3.21 23.25 3.65 2.23 3.18 23.50 3.66 2.24 3.14 23.75 3.67 2.25 3.11 24.00 3.68 2.26 3.08 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 11 Summary for Subcatchment 5S: E1 Runoff = 88.77 cfs @ 11.97 hrs, Volume= 4.293 af, Depth> 1.85" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 27.800 81 27.800 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: E1 Hydrograph 95 I I I I I I I I I I I I I I I 90 88.77 � �/I 1-� �I 85 1 I- I I 1 I 1 1 1 1 1 -I 1 1 -'TYpe 11! 4-hr 80 1 1 1 1 1 ' -' IZ I k �I�i� NTJ 08" 75 I 70 yI - ioff YYY� ��■N a i T� Q 3. -, IN -at 65 - I- - - r �Iy 60 1 1 - -1 - - - - - I - 1 -1R�nofflYolumle- - - — 55 I1 •1f��p106 50 I II I 4 I I LL45-1 -.-__I_I _-- _I _I- -I-I 1-1-Tcll:-6.0a"h 40 DTI 35 30 25 1_ I_ 1 _I_ L -1 _ L 1_ 1- 1_ I I I I_ 1 -I_ L -1 _ L 20 - I- I _ _ 1 -1 _1 1 _ I_ 1 I I 1 1 _ 1 -1 _ 1 15 1 - 1- 1 1 L 1 - L - - - 1 -1 1 -1 - - I- 1 - - - -I L 10 I- 1 I L -1 - L - - - 1 - 1 -1 - - - - I- 1 - - - -I - L 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Runoff Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 12 Hydrograph for Subcatchment 5S: E1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.00 8.25 0.46 0.00 0.00 8.50 0.49 0.00 0.02 8.75 0.51 0.00 0.08 9.00 0.54 0.00 0.16 9.25 0.57 0.00 0.24 9.50 0.60 0.01 0.31 9.75 0.63 0.01 0.42 10.00 0.67 0.02 0.56 10.25 0.71 0.02 0.75 10.50 0.75 0.03 0.99 10.75 0.80 0.04 1.34 11.00 0.86 0.06 1.80 11.25 0.94 0.08 2.63 11.50 1.04 0.11 3.86 11.75 1.42 0.28 22.09 12.00 2.44 0.90 85.17 12.25 2.60 1.01 12.48 12.50 2.70 1.09 8.18 12.75 2.78 1.15 6.05 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.19 5.10 13.25 2.89 1.23 4.42 13.50 2.94 1.27 3.89 13.75 2.98 1.30 3.46 14.00 3.02 1.33 3.08 14.25 3.05 1.35 2.86 14.50 3.08 1.38 2.73 14.75 3.11 1.40 2.60 15.00 3.14 1.42 2.47 15.25 3.17 1.44 2.33 15.50 3.19 1.46 2.20 15.75 3.22 1.48 2.06 16.00 3.24 1.50 1.92 16.25 3.26 1.52 1.84 16.50 3.28 1.53 1.80 16.75 3.30 1.55 1.75 17.00 3.32 1.56 1.70 17.25 3.34 1.58 1.65 17.50 3.36 1.59 1.60 17.75 3.37 1.61 1.56 18.00 3.39 1.62 1.51 18.25 3.41 1.63 1.46 18.50 3.42 1.65 1.41 18.75 3.44 1.66 1.36 19.00 3.45 1.67 1.31 19.25 3.46 1.68 1.26 19.50 3.48 1.69 1.21 19.75 3.49 1.70 1.16 20.00 3.50 1.71 1.11 20.25 3.52 1.72 1.08 20.50 3.53 1.73 1.07 20.75 3.54 1.74 1.06 21.00 3.55 1.75 1.05 21.25 3.56 1.76 1.04 21.50 3.57 1.77 1.03 21.75 3.58 1.78 1.02 22.00 3.60 1.79 1.01 22.25 3.61 1.80 1.00 22.50 3.62 1.80 0.99 22.75 3.63 1.81 0.99 23.00 3.64 1.82 0.98 23.25 3.65 1.83 0.97 23.50 3.66 1.84 0.96 23.75 3.67 1.85 0.95 24.00 3.68 1.86 0.94 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment 6S: E2 Runoff = 56.63 cfs @ 11.99 hrs, Volume= 2.891 af, Depth> 2.01" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 17.280 83 17.280 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 6S: E2 Hydrograph ■ Runoff 60 56.63 cfs 55 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ITyrpe Ili 24-hr 50 1 1 1 1 1 1 I I I I 1 1 2 1 RainfollT3.081 45 1 1 1 1 1 Ruhoff Arda�=17.280 at f- 1 �- -i — I— t I t 1 �- 40 1 1 1 1 1 1 1Ru noffl Vol u m1e�2.891 of --------------- ---------------- 35 k 1n^ff ID 11 „#h�2.0-161 — I— — I — 4- —1 — � — 1— — — Q — I— '�K7— 4- — — a 25 /+1 11 1 N 20 1 1 1 1 1 1 1 1 15 10 I I I I I I I I I 5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 14 Hydrograph for Subcatchment 6S: E2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.00 5.00 0.23 0.00 0.00 5.25 0.25 0.00 0.00 5.50 0.26 0.00 0.00 5.75 0.28 0.00 0.00 6.00 0.29 0.00 0.00 6.25 0.31 0.00 0.00 6.50 0.33 0.00 0.00 6.75 0.35 0.00 0.00 7.00 0.36 0.00 0.00 7.25 0.38 0.00 0.00 7.50 0.40 0.00 0.00 7.75 0.42 0.00 0.00 8.00 0.44 0.00 0.03 8.25 0.46 0.00 0.06 8.50 0.49 0.00 0.10 8.75 0.51 0.00 0.15 9.00 0.54 0.01 0.21 9.25 0.57 0.01 0.26 9.50 0.60 0.02 0.31 9.75 0.63 0.02 0.38 10.00 0.67 0.03 0.48 10.25 0.71 0.04 0.62 10.50 0.75 0.05 0.79 10.75 0.80 0.06 1.03 11.00 0.86 0.08 1.35 11.25 0.94 0.11 1.89 11.50 1.04 0.15 2.73 11.75 1.42 0.34 13.07 12.00 2.44 1.01 56.51 12.25 2.60 1.13 9.53 12.50 2.70 1.21 5.70 12.75 2.78 1.27 4.05 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.32 3.41 13.25 2.89 1.36 2.93 13.50 2.94 1.40 2.58 13.75 2.98 1.43 2.29 14.00 3.02 1.46 2.04 14.25 3.05 1.49 1.87 14.50 3.08 1.51 1.79 14.75 3.11 1.54 1.70 15.00 3.14 1.56 1.61 15.25 3.17 1.58 1.53 15.50 3.19 1.60 1.44 15.75 3.22 1.62 1.35 16.00 3.24 1.64 1.26 16.25 3.26 1.66 1.20 16.50 3.28 1.67 1.17 16.75 3.30 1.69 1.14 17.00 3.32 1.71 1.11 17.25 3.34 1.72 1.07 17.50 3.36 1.74 1.04 17.75 3.37 1.75 1.01 18.00 3.39 1.77 0.98 18.25 3.41 1.78 0.95 18.50 3.42 1.79 0.91 18.75 3.44 1.81 0.88 19.00 3.45 1.82 0.85 19.25 3.46 1.83 0.82 19.50 3.48 1.84 0.78 19.75 3.49 1.85 0.75 20.00 3.50 1.86 0.72 20.25 3.52 1.87 0.70 20.50 3.53 1.88 0.69 20.75 3.54 1.89 0.69 21.00 3.55 1.90 0.68 21.25 3.56 1.91 0.67 21.50 3.57 1.92 0.67 21.75 3.58 1.93 0.66 22.00 3.60 1.94 0.65 22.25 3.61 1.95 0.65 22.50 3.62 1.96 0.64 22.75 3.63 1.97 0.64 23.00 3.64 1.98 0.63 23.25 3.65 1.98 0.62 23.50 3.66 1.99 0.62 23.75 3.67 2.00 0.61 24.00 3.68 2.01 0.60 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment 7S: F1 Runoff = 253.45 cfs @ 12.02 hrs, Volume= 14.984 af, Depth> 2.71" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 66.440 91 66.440 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 11.0 Direct Entry, Subcatchment 7S: F1 Hydrograph -I-+-I-4--I-I-4-I-+-1- -4-1-+-I- -I-I--4-1-4--1- 280 - - - _ _ 1 _I _ I_ 1 _ _ _ _ 1 1 _ _ 1 _ _ 1 _I _ I_ 1 - 260 n 1 1 1 1 1 1 1 1 253.45 cfs Type A 24-h ri - I- 7- 1- - -. I -1- I I I 1- T -1 - I I r -1 - I I 1- -T - - T 1 -1 - 240 U,=3, 220 � YO Oa'ka- 60 200 --------------- Rurhoff Ar�a�66.4401a 1 ------------ 1 1 1 1 1 1 1 1 180 �artI �-I-rt-I-�-I-I-rt-I-fi-I- un�orfWouiru�et1�N4.98 a -1-1-1-1-L-1-1-1-1-L-1- 0 160 Ru off-Deot 1>2-7 1"1 _ 1 -1 1 1 1 1 1 1 � 0 140 I I I I I I I I Tc--d •-. AV I m in-i - I- - I I i I -i - I I I I- + - I - I I -I - I I I- -t - I I I I - -I - a 120 I - 100� 80 7 -I- T -1- 7 1 7 -1- T -1 � -1- 7 -1- T 1 7 -1- T -1- I + -1- -1 - 1- 4 -I- = - A -1- 4 -1- - - 1- -4 -1- 4- -I- 60 - I I I I I I - - - I - - I I I - - - - - - I I - - - I I I - - - - 40 tI 1 I I- T- I I I I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 16 Hydrograph for Subcatchment 7S: F1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.08 5.00 0.23 0.00 0.18 5.25 0.25 0.00 0.30 5.50 0.26 0.00 0.41 5.75 0.28 0.01 0.54 6.00 0.29 0.01 0.67 6.25 0.31 0.01 0.80 6.50 0.33 0.02 0.93 6.75 0.35 0.02 1.07 7.00 0.36 0.02 1.22 7.25 0.38 0.03 1.37 7.50 0.40 0.03 1.52 7.75 0.42 0.04 1.67 8.00 0.44 0.05 1.83 8.25 0.46 0.06 2.05 8.50 0.49 0.07 2.41 8.75 0.51 0.08 2.80 9.00 0.54 0.09 3.23 9.25 0.57 0.10 3.59 9.50 0.60 0.12 3.78 9.75 0.63 0.13 4.14 10.00 0.67 0.15 4.82 10.25 0.71 0.17 5.67 10.50 0.75 0.20 6.76 10.75 0.80 0.23 8.15 11.00 0.86 0.27 10.04 11.25 0.94 0.32 12.94 11.50 1.04 0.39 17.54 11.75 1.42 0.68 61.01 12.00 2.44 1.56 248.77 12.25 2.60 1.70 62.80 12.50 2.70 1.80 28.94 12.75 2.78 1.87 19.22 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.92 15.92 13.25 2.89 1.97 13.48 13.50 2.94 2.02 11.85 13.75 2.98 2.05 10.43 14.00 3.02 2.09 9.28 14.25 3.05 2.12 8.41 14.50 3.08 2.15 7.99 14.75 3.11 2.18 7.59 15.00 3.14 2.20 7.20 15.25 3.17 2.23 6.80 15.50 3.19 2.25 6.40 15.75 3.22 2.27 6.00 16.00 3.24 2.29 5.60 16.25 3.26 2.31 5.29 16.50 3.28 2.33 5.14 16.75 3.30 2.35 5.00 17.00 3.32 2.37 4.86 17.25 3.34 2.39 4.72 17.50 3.36 2.40 4.57 17.75 3.37 2.42 4.43 18.00 3.39 2.44 4.29 18.25 3.41 2.45 4.14 18.50 3.42 2.47 4.00 18.75 3.44 2.48 3.86 19.00 3.45 2.49 3.71 19.25 3.46 2.51 3.57 19.50 3.48 2.52 3.42 19.75 3.49 2.53 3.28 20.00 3.50 2.54 3.13 20.25 3.52 2.56 3.03 20.50 3.53 2.57 3.00 20.75 3.54 2.58 2.97 21.00 3.55 2.59 2.94 21.25 3.56 2.60 2.91 21.50 3.57 2.61 2.88 21.75 3.58 2.62 2.86 22.00 3.60 2.63 2.83 22.25 3.61 2.64 2.80 22.50 3.62 2.65 2.77 22.75 3.63 2.66 2.74 23.00 3.64 2.67 2.71 23.25 3.65 2.68 2.68 23.50 3.66 2.69 2.66 23.75 3.67 2.70 2.63 24.00 3.68 2.71 2.60 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 17 Summary for Subcatchment 8S: F2 Runoff = 133.88 cfs @ 11.99 hrs, Volume= 7.140 af, Depth> 2.71" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 31.640 91 31.640 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 8S: F2 Hydrograph L —1 L - — 1— 4 —1 1- - - — 1— 4- —1 — 140 133.88 ors 130 1 — 1— 1 —1 — 1 —1 — 1 1 —1— 1 1 1 — 1— 1 —1 1 IT�pe 11124-hr — — — — — — — — — — — — 120 -i — I— + —I— L —1 — I— -f —I— fi 1 -1 11 Y1:?;-ROfln cj1L�3'r38j 110 -1 1 1 L _I _ I_ L I_ L 1 -1 Ruhoff Alr-da:'G 1 .-64a at 100 90 - -1- -1- —1 — -1 1 Jbunofflnolume=-7-'r40 of 80 _ _11 _1 1_ 1 4- 1 - ' UIIn�ff(D-q-p�h>2 _11 61 LL70 - I_-_ I- 1 -I - I- 1- I 1 1 1 1 1 1 TT 8.0 1�1 60#'I 9t 50 1 1C1�� 40 30 20 1 1 1 F 7 1 1 -I - t- -1 - 1- rt - I t - I I - rt -'- fi -1 10I I 1 I I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 18 Hydrograph for Subcatchment 8S: F2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.00 4.50 0.20 0.00 0.00 4.75 0.22 0.00 0.04 5.00 0.23 0.00 0.10 5.25 0.25 0.00 0.15 5.50 0.26 0.00 0.21 5.75 0.28 0.01 0.27 6.00 0.29 0.01 0.33 6.25 0.31 0.01 0.39 6.50 0.33 0.02 0.46 6.75 0.35 0.02 0.52 7.00 0.36 0.02 0.59 7.25 0.38 0.03 0.66 7.50 0.40 0.03 0.74 7.75 0.42 0.04 0.81 8.00 0.44 0.05 0.88 8.25 0.46 0.06 1.00 8.50 0.49 0.07 1.18 8.75 0.51 0.08 1.37 9.00 0.54 0.09 1.58 9.25 0.57 0.10 1.73 9.50 0.60 0.12 1.82 9.75 0.63 0.13 2.02 10.00 0.67 0.15 2.36 10.25 0.71 0.17 2.79 10.50 0.75 0.20 3.32 10.75 0.80 0.23 4.04 11.00 0.86 0.27 4.96 11.25 0.94 0.32 6.52 11.50 1.04 0.39 8.79 11.75 1.42 0.68 37.51 12.00 2.44 1.56 133.09 12.25 2.60 1.70 21.09 12.50 2.70 1.80 12.41 12.75 2.78 1.87 8.74 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 1.92 7.32 13.25 2.89 1.97 6.26 13.50 2.94 2.02 5.50 13.75 2.98 2.05 4.86 14.00 3.02 2.09 4.32 14.25 3.05 2.12 3.96 14.50 3.08 2.15 3.77 14.75 3.11 2.18 3.58 15.00 3.14 2.20 3.39 15.25 3.17 2.23 3.20 15.50 3.19 2.25 3.01 15.75 3.22 2.27 2.82 16.00 3.24 2.29 2.63 16.25 3.26 2.31 2.50 16.50 3.28 2.33 2.44 16.75 3.30 2.35 2.37 17.00 3.32 2.37 2.30 17.25 3.34 2.39 2.23 17.50 3.36 2.40 2.17 17.75 3.37 2.42 2.10 18.00 3.39 2.44 2.03 18.25 3.41 2.45 1.96 18.50 3.42 2.47 1.89 18.75 3.44 2.48 1.82 19.00 3.45 2.49 1.75 19.25 3.46 2.51 1.69 19.50 3.48 2.52 1.62 19.75 3.49 2.53 1.55 20.00 3.50 2.54 1.48 20.25 3.52 2.56 1.44 20.50 3.53 2.57 1.43 20.75 3.54 2.58 1.41 21.00 3.55 2.59 1.40 21.25 3.56 2.60 1.38 21.50 3.57 2.61 1.37 21.75 3.58 2.62 1.36 22.00 3.60 2.63 1.34 22.25 3.61 2.64 1.33 22.50 3.62 2.65 1.32 22.75 3.63 2.66 1.30 23.00 3.64 2.67 1.29 23.25 3.65 2.68 1.28 23.50 3.66 2.69 1.26 23.75 3.67 2.70 1.25 24.00 3.68 2.71 1.23 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 19 Summary for Subcatchment 9S: G1 Runoff = 175.55 cfs @ 12.05 hrs, Volume= 11.418 af, Depth> 2.80" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 48.900 92 48.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.0 Direct Entry, Subcatchment 9S: G1 Hydrograph 190 I I I I I I I I I I I I I I I I I I I I I I - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 180 170 1 1 175.55 cfs Type II 24-hr i1- - -'- -1 -1- 1 1 1 1- � YO Oa'nI1dU; ;�0.L 11 1 1 1 11_ 1- 11 160 140 - -11 - -11 _ _ -1 - 130,E I� kUnoff1l o- �urlle- 1Il.41�a-1— 120 N 110 Rahoff�?eOt�i>80' 1 u 100 0 90 I _1_ I _I___I_I I _I_ _ _I_ _I_I_ _I_ _I_ _ TTc-�l4-Q1 mf_n 1 I 1 1 _ -1 1 _ 1 _ 1 _I _ 1_ 1 _ 1_ 1 _1U. 80 70'Yi--r-1_ L -1 _ I_ 1 - I_ I -1 J _I_ 1 - I_ L -1 _ 1_ J _I_ L _1_ 60 L I 1 -1- L-1 L I -I I 1 J -I- 1 - I - L -1 - 1- 1 - I - L -1- 50 L _ 1_ 1 -1 _ L J - I_ 1 - I _ J -1 _ I_ 1 - I _ L -1 _ 1_ L _ I_ L -1 _ 40 L 1-1 1 L-1 LL I I-1-I-1-I-L-1- L I -L 1 30 L_1 L-1-LJ-LI-I-J I I-J-' L-1_ 20 1 -1- - - I - L - - - 1 -1- - - 1 -1- - - - 1- 1 - - L -1- 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 20 Hydrograph for Subcatchment 9S: G1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.03 4.50 0.20 0.00 0.10 4.75 0.22 0.00 0.19 5.00 0.23 0.00 0.27 5.25 0.25 0.01 0.36 5.50 0.26 0.01 0.46 5.75 0.28 0.01 0.56 6.00 0.29 0.01 0.66 6.25 0.31 0.02 0.76 6.50 0.33 0.02 0.87 6.75 0.35 0.03 0.98 7.00 0.36 0.03 1.09 7.25 0.38 0.04 1.20 7.50 0.40 0.05 1.32 7.75 0.42 0.05 1.44 8.00 0.44 0.06 1.55 8.25 0.46 0.07 1.71 8.50 0.49 0.08 1.98 8.75 0.51 0.09 2.29 9.00 0.54 0.11 2.63 9.25 0.57 0.12 2.93 9.50 0.60 0.14 3.08 9.75 0.63 0.16 3.31 10.00 0.67 0.18 3.81 10.25 0.71 0.20 4.43 10.50 0.75 0.23 5.26 10.75 0.80 0.26 6.27 11.00 0.86 0.31 7.68 11.25 0.94 0.36 9.67 11.50 1.04 0.43 13.04 11.75 1.42 0.74 36.73 12.00 2.44 1.64 157.91 12.25 2.60 1.78 66.83 12.50 2.70 1.88 25.51 12.75 2.78 1.95 15.30 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 2.01 12.34 13.25 2.89 2.06 10.35 13.50 2.94 2.10 9.07 13.75 2.98 2.14 7.97 14.00 3.02 2.18 7.08 14.25 3.05 2.21 6.37 14.50 3.08 2.24 6.02 14.75 3.11 2.27 5.72 15.00 3.14 2.29 5.42 15.25 3.17 2.32 5.12 15.50 3.19 2.34 4.83 15.75 3.22 2.37 4.53 16.00 3.24 2.39 4.23 16.25 3.26 2.41 3.98 16.50 3.28 2.43 3.85 16.75 3.30 2.45 3.74 17.00 3.32 2.46 3.64 17.25 3.34 2.48 3.53 17.50 3.36 2.50 3.42 17.75 3.37 2.51 3.32 18.00 3.39 2.53 3.21 18.25 3.41 2.55 3.10 18.50 3.42 2.56 3.00 18.75 3.44 2.58 2.89 19.00 3.45 2.59 2.78 19.25 3.46 2.60 2.67 19.50 3.48 2.62 2.57 19.75 3.49 2.63 2.46 20.00 3.50 2.64 2.35 20.25 3.52 2.65 2.26 20.50 3.53 2.66 2.23 20.75 3.54 2.67 2.21 21.00 3.55 2.68 2.19 21.25 3.56 2.70 2.17 21.50 3.57 2.71 2.15 21.75 3.58 2.72 2.13 22.00 3.60 2.73 2.11 22.25 3.61 2.74 2.09 22.50 3.62 2.75 2.06 22.75 3.63 2.76 2.04 23.00 3.64 2.77 2.02 23.25 3.65 2.78 2.00 23.50 3.66 2.79 1.98 23.75 3.67 2.80 1.96 24.00 3.68 2.81 1.94 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 21 Summary for Subcatchment 10S: G2 Runoff = 176.09 cfs @ 12.05 hrs, Volume= 11.453 af, Depth> 2.80" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2 YR Rainfall=3.68" Area (ac) CN Description 49.050 92 49.050 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.0 Direct Entry, Subcatchment 10S: G2 Hydrograph I I I I I I I I I I I I I I I I I I I I I 190 180 1 _ 1 176.09 ors Type 170 Type TI-f1_ P 1160 50 � YO 0a'n�aH; ;f0.. 11 140—Runoff -Areaz49:050Iac- -1 1 _ 1_ 1 -1-1 -1 _ 1_ 1 _ 1_ 1 130 - ' 120 Runoff -I - (U-1ler1�.45Za _ 1_ _1 _ [ _ w 110 Ruhoff-Deti>80' 1-1- " 100 I -I-----I-I- -I- -I- -I- -I-I- -I- -I_ 0 90 1 Tc=;14. Q 1 m Ln-1 - 1- I - 1- i -_ 1 - 1- I -1-1 -1 - 1- I - 1- I -1 - " 80 1 70---r-1—L-1--1—I—L-1 J_I_1_I_L-1--J—I—L-1_ 60 11 1 _1_ 1 1I 1 _1 1 1 _1_ 1 _1_ 1 _I_1_ 1 _1_ 1 _1_ 50 L-1-1_1_LJ--1_I_J-1 _1_1_I_L_I_I_L_I_L_1- 40 1- I- 1 1 L-1 L L I L -1 - 1- 1- I- L -1 - L L I- L 1 30 -1 1 L-1-LJ-LI-I-J I I_J-' L-1_ 20 1 -I- - -1- L - -'- 1 - I - - - 1 - I - - - - L 1 - - L -1- 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 22 Hydrograph for Subcatchment 10S: G2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.02 0.00 0.00 0.75 0.03 0.00 0.00 1.00 0.04 0.00 0.00 1.25 0.05 0.00 0.00 1.50 0.06 0.00 0.00 1.75 0.07 0.00 0.00 2.00 0.08 0.00 0.00 2.25 0.09 0.00 0.00 2.50 0.10 0.00 0.00 2.75 0.12 0.00 0.00 3.00 0.13 0.00 0.00 3.25 0.14 0.00 0.00 3.50 0.15 0.00 0.00 3.75 0.16 0.00 0.00 4.00 0.18 0.00 0.00 4.25 0.19 0.00 0.03 4.50 0.20 0.00 0.10 4.75 0.22 0.00 0.19 5.00 0.23 0.00 0.27 5.25 0.25 0.01 0.37 5.50 0.26 0.01 0.46 5.75 0.28 0.01 0.56 6.00 0.29 0.01 0.66 6.25 0.31 0.02 0.76 6.50 0.33 0.02 0.87 6.75 0.35 0.03 0.98 7.00 0.36 0.03 1.09 7.25 0.38 0.04 1.21 7.50 0.40 0.05 1.32 7.75 0.42 0.05 1.44 8.00 0.44 0.06 1.56 8.25 0.46 0.07 1.72 8.50 0.49 0.08 1.99 8.75 0.51 0.09 2.30 9.00 0.54 0.11 2.64 9.25 0.57 0.12 2.94 9.50 0.60 0.14 3.09 9.75 0.63 0.16 3.32 10.00 0.67 0.18 3.82 10.25 0.71 0.20 4.45 10.50 0.75 0.23 5.27 10.75 0.80 0.26 6.29 11.00 0.86 0.31 7.70 11.25 0.94 0.36 9.70 11.50 1.04 0.43 13.08 11.75 1.42 0.74 36.84 12.00 2.44 1.64 158.39 12.25 2.60 1.78 67.04 12.50 2.70 1.88 25.59 12.75 2.78 1.95 15.34 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 2.84 2.01 12.38 13.25 2.89 2.06 10.39 13.50 2.94 2.10 9.10 13.75 2.98 2.14 7.99 14.00 3.02 2.18 7.11 14.25 3.05 2.21 6.39 14.50 3.08 2.24 6.03 14.75 3.11 2.27 5.73 15.00 3.14 2.29 5.44 15.25 3.17 2.32 5.14 15.50 3.19 2.34 4.84 15.75 3.22 2.37 4.54 16.00 3.24 2.39 4.24 16.25 3.26 2.41 3.99 16.50 3.28 2.43 3.86 16.75 3.30 2.45 3.75 17.00 3.32 2.46 3.65 17.25 3.34 2.48 3.54 17.50 3.36 2.50 3.43 17.75 3.37 2.51 3.33 18.00 3.39 2.53 3.22 18.25 3.41 2.55 3.11 18.50 3.42 2.56 3.01 18.75 3.44 2.58 2.90 19.00 3.45 2.59 2.79 19.25 3.46 2.60 2.68 19.50 3.48 2.62 2.57 19.75 3.49 2.63 2.47 20.00 3.50 2.64 2.36 20.25 3.52 2.65 2.27 20.50 3.53 2.66 2.24 20.75 3.54 2.67 2.22 21.00 3.55 2.68 2.20 21.25 3.56 2.70 2.18 21.50 3.57 2.71 2.16 21.75 3.58 2.72 2.13 22.00 3.60 2.73 2.11 22.25 3.61 2.74 2.09 22.50 3.62 2.75 2.07 22.75 3.63 2.76 2.05 23.00 3.64 2.77 2.03 23.25 3.65 2.78 2.01 23.50 3.66 2.79 1.98 23.75 3.67 2.80 1.96 24.00 3.68 2.81 1.94 Existing Type 1l 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 23 Summary for Pond 4P: Pond 1 [44] Hint: Outlet device #2 is below defined storage Inflow Area = 450.690 ac, 0.00% Impervious, Inflow Depth > 2.33" for 2 YR event Inflow = 1,530.57 cfs @ 11.99 hrs, Volume= 87.518 of Outflow = 860.93 cfs @ 12.11 hrs, Volume= 87.361 af, Atten= 44%, Lag= 7.3 min Primary = 860.93 cfs @ 12.11 hrs, Volume= 87.361 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 456.61' @ 12.11 hrs Surf.Area= 230,481 sf Storage= 929,533 cf Plug -Flow detention time=17.7 min calculated for 87.180 of (100% of inflow) Center -of -Mass det. time= 16.5 min ( 825.2 - 808.7 ) Volume Invert Avail.Storage Storage Description #1 452.00' 4,171,244 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 452.00 161,235 0 0 453.00 184,727 172,981 172,981 454.00 202,532 193,630 366,611 455.00 212,990 207,761 574,372 456.00 222,197 217,594 791,965 457.00 235,826 229,012 1,020,977 458.00 245,304 240,565 1,261,542 459.00 255,870 250,587 1,512,129 460.00 267,777 261,824 1,773,952 461.00 278,902 273,340 2,047,292 462.00 291,119 285,011 2,332,302 463.00 366,599 328,859 2,661,161 464.00 372,291 369,445 3,030,606 465.00 378,035 375,163 3,405,769 466.00 382,323 380,179 3,785,948 467.00 388,269 385,296 4,171,244 Device Routinq Invert Outlet Devices #1 Primary 435.10' 108.0" W x 120.0" H Box Culvert X 2.00 L= 131.5' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 435.10' / 434.52' S= 0.0044 '/' Cc= 0.900 n= 0.013, Flow Area= 90.00 sf #2 Device 1 435.70' 24.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 452.22' 23.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) #4 Device 1 455.90' 66.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) #5 Primary 461.00' 55.0' long x 20.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Existing Type 11 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 24 Primary OutFlow Max=851.49 cfs @ 12.11 hrs HW=456.59' (Free Discharge) 1=Culvert (Passes 851.49 cfs of 3,505.66 cfs potential flow) P4=S =Orifice/Grate (Orifice Controls 67.46 cfs @ 21.47 fps) =Sharp -Crested Rectangular Weir(Weir Controls 660.79 cfs @ 6.84 fps) harp -Crested Rectangular Weir(Weir Controls 123.24 cfs @ 2.71 fps) 5=Broad-Crested Rectangular Weir( Controls 0.00 cfs) Pond 4P: Pond 1 Hydrograph — fi t— - 1 t 1 1 t 1 1 / -4 4 1 — -4 I -�- -� --I I + 1 1 + 1 1 1,700 / 1,530.57 cfs 1,600 Inflow AreaF45O 690, L I L— —,— L I L L I ac 1,500 L 161 1,400 / I I I I I I I I �ak �Iav�406. I I I I I I I I � I I 1,300 / 1 1 1 1 1 1 1 1 1 1 I Storage, -929 M -C f 1,200 / 1,100 / w 1,000 / v 900 860.93 cfs c 800 7 1 L 7 1 7 1 7 T- 1 T 1 1 T 1 700 600 / 500 / 400 / 300 200 / 1 100 / 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Inflow p Primary Existing Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 25 Pond 4P: Pond 1 Stage -Discharge 467 466 - - - - - - - - - - - - - - - - - - - - - - 465 464 I I I t- - - - -- 463 - - - - L- 462 - Broad -Crested Rectangular Weir- - d 461 w----r-- -�-----1-----1--- c 460- 'a 459 > - - - - - - - - - - - - - - - - w 458 1 - - - - - - - - - - - - - - - - - - I I I 457 Sharp -Crested Rectangular Weir - - 4 - - - - -I- 456 455 454- -- 453- _ Sharp -Crested Rectangular Weir 452 0 1,000 2,000 3,000 4,000 5,600 6,000 Discharge (cfs) Pond 4P: Pond 1 Stage -Area -Storage Surface/Horizontal/Wetted Area (sq-ft) 0 50,000 100,000 150,000 200.000 250.001 467 It 1-1 1 1 I I I fi 1 fi 1 1 1+ H - 466 465 - L _ _ _ 11 _ _ _1_1_ _ _1- I_ I 464 II 463 II 462 II 1 1 a 461 � 460 - - IT - - 1-1- I - - I - 7 - I - I - -1 - 459 � it I� I I fi fi I 1 >>' I+ I I t I � 458 15 1� I I I I 1- 1 J 1 1 - 457 L _ _ i - . - _ _ I - I_ -1 - L - -1 _ 1 _ -1 _ -1 - J - 456 i l 455 II 454 453 Custom Stage Data 452 0 500,000 1,000,000 1,500,000 2,000,000 2,500,000 3,000,000 3,500,000 4,000,000 Storage (cubic -feet) ❑ Primary e Surface ❑ Storage Existing Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 26 Hydrograph for Pond 4P: Pond 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 452.00 0.00 0.50 0.00 0 452.00 0.00 1.00 0.00 0 452.00 0.00 1.50 0.00 0 452.00 0.00 2.00 0.00 0 452.00 0.00 2.50 0.00 0 452.00 0.00 3.00 0.00 0 452.00 0.00 3.50 0.00 0 452.00 0.00 4.00 0.00 0 452.00 0.00 4.50 0.21 59 452.00 0.14 5.00 0.83 278 452.00 0.68 5.50 1.54 564 452.00 1.37 6.00 2.31 876 452.01 2.13 6.50 3.13 1,209 452.01 2.94 7.00 4.22 1,629 452.01 3.96 7.50 5.40 2,109 452.01 5.13 8.00 6.67 2,620 452.02 6.37 8.50 9.29 3,519 452.02 8.56 9.00 13.34 5,077 452.03 12.35 9.50 16.49 6,540 452.04 15.90 10.00 22.15 8,447 452.05 20.54 10.50 32.59 12,303 452.08 29.92 11.00 50.87 18,960 452.12 46.11 11.50 94.20 43,401 452.26 60.61 12.00 1,518.28 761,886 455.86 572.90 12.50 171.23 569,298 454.98 400.59 13.00 96.82 295,336 453.64 188.30 13.50 72.79 180,743 453.04 116.80 14.00 57.24 118,149 452.70 85.39 14.50 49.87 76,081 452.46 68.73 15.00 44.97 45,482 452.28 60.90 15.50 40.02 18,775 452.12 45.66 16.00 35.02 14,895 452.09 36.22 16.50 32.38 13,500 452.08 32.83 17.00 30.62 12,756 452.08 31.02 17.50 28.84 12,027 452.07 29.25 18.00 27.05 11,293 452.07 27.46 18.50 25.25 10,554 452.06 25.67 19.00 23.44 9,811 452.06 23.86 19.50 21.63 9,064 452.06 22.04 20.00 19.80 8,313 452.05 20.22 20.50 19.05 7,874 452.05 19.15 21.00 18.70 7,721 452.05 18.78 21.50 18.35 7,577 452.05 18.43 22.00 17.99 7,432 452.05 18.07 22.50 17.64 7,286 452.04 17.72 23.00 17.28 7,140 452.04 17.36 23.50 16.92 6,993 452.04 17.01 24.00 16.55 6,845 452.04 16.65 Existing Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 27 Elevation Primary (feet) (cfs) 452.00 0.00 452.15 59.46 452.30 61.45 452.45 68.31 452.60 77.88 452.75 89.49 452.90 102.81 453.05 117.63 453.20 133.79 453.35 151.18 453.50 169.70 453.65 189.29 453.80 209.87 453.95 231.39 454.10 253.80 454.25 277.06 454.40 301.13 454.55 325.98 454.70 351.58 454.85 377.89 455.00 404.89 455.15 432.57 455.30 460.89 455.45 489.83 455.60 519.38 455.75 549.52 455.90 580.23 456.05 624.03 456.20 678.73 456.35 740.69 456.50 808.60 456.65 881.67 456.80 959.41 456.95 1,041.41 457.10 1,127.37 457.25 1,217.06 457.40 1,310.25 457.55 1,406.79 457.70 1,506.52 457.85 1,609.29 458.00 1,715.01 458.15 1,823.55 458.30 1,934.82 458.45 2,048.74 458.60 2,165.22 458.75 2,284.19 458.90 2,405.58 459.05 2,529.32 459.20 2,655.36 459.35 2,783.64 459.50 2,914.10 459.65 3,046.70 Stage -Discharge for Pond 4P: Pond 1 Elevation Primary (feet) (cfs) 459.80 3,181.39 459.95 3,318.12 460.10 3,456.85 460.25 3,597.54 460.40 3,740.16 460.55 3,884.66 460.70 3,923.93 460.85 3,938.33 461.00 3,952.68 461.15 3,975.54 461.30 4,005.53 461.45 4,040.24 461.60 4,078.57 461.75 4,118.49 461.90 4,161.42 462.05 4,207.46 462.20 4,256.49 462.35 4,307.27 462.50 4,359.60 462.65 4,413.73 462.80 4,470.23 462.95 4,528.50 463.10 4,588.47 463.25 4,650.08 463.40 4,713.27 463.55 4,777.99 463.70 4,844.20 463.85 4,911.85 464.00 4,980.90 464.15 5,051.32 464.30 5,123.07 464.45 5,196.13 464.60 5,270.46 464.75 5,346.03 464.90 5,422.82 465.05 5,500.81 465.20 5,579.97 465.35 5,660.28 465.50 5,741.73 465.65 5,824.28 465.80 5,907.93 465.95 5,992.65 466.10 6,078.44 466.25 6,165.26 466.40 6,253.12 466.55 6,341.99 466.70 6,431.85 466.85 6,522.71 467.00 6,614.53 Existing Type // 24-hr 2 YR Rainfall=3.68" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 28 Stage -Area -Storage for Pond 4P: Pond 1 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 452.00 161,235 0 452.15 164,759 24,450 452.30 168,283 49,428 452.45 171,806 74,934 452.60 175,330 100,970 452.75 178,854 127,533 452.90 182,378 154,626 453.05 185,617 182,240 453.20 188,288 210,282 453.35 190,959 238,726 453.50 193,630 267,570 453.65 196,300 296,815 453.80 198,971 326,460 453.95 201,642 356,506 454.10 203,578 386,916 454.25 205,147 417,570 454.40 206,715 448,460 454.55 208,284 479,585 454.70 209,853 510,945 454.85 211,421 542,541 455.00 212,990 574,372 455.15 214,371 606,424 455.30 215,752 638,683 455.45 217,133 671,149 455.60 218,514 703,823 455.75 219,895 736,703 455.90 221,276 769,791 456.05 222,878 803,092 456.20 224,923 836,677 456.35 226,967 870,569 456.50 229,012 904,767 456.65 231,056 939,272 456.80 233,100 974,084 456.95 235,145 1,009,202 457.10 236,774 1,044,606 457.25 238,196 1,080,229 457.40 239,617 1,116,065 457.55 241,039 1,152,114 457.70 242,461 1,188,377 457.85 243,882 1,224,853 458.00 245,304 1,261,542 458.15 246,889 1,298,456 458.30 248,474 1,335,608 458.45 250,059 1,372,998 458.60 251,644 1,410,626 458.75 253,229 1,448,491 458.90 254,813 1,486,594 459.05 256,465 1,524,937 459.20 258,251 1,563,541 459.35 260,037 1,602,412 459.50 261,824 1,641,552 459.65 263,610 1,680,959 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 459.80 265,396 1,720,635 459.95 267,182 1,760,578 460.10 268,890 1,800,785 460.25 270,558 1,841,244 460.40 272,227 1,881,953 460.55 273,896 1,922,912 460.70 275,564 1,964,122 460.85 277,233 2,005,581 461.00 278,902 2,047,292 461.15 280,735 2,089,264 461.30 282,567 2,131,512 461.45 284,400 2,174,034 461.60 286,232 2,216,832 461.75 288,065 2,259,904 461.90 289,897 2,303,251 462.05 294,893 2,346,952 462.20 306,215 2,392,035 462.35 317,537 2,438,817 462.50 328,859 2,487,297 462.65 340,181 2,537,474 462.80 351,503 2,589,351 462.95 362,825 2,642,925 463.10 367,168 2,697,849 463.25 368,022 2,752,989 463.40 368,876 2,808,256 463.55 369,730 2,863,651 463.70 370,583 2,919,175 463.85 371,437 2,974,826 464.00 372,291 3,030,606 464.15 373,153 3,086,514 464.30 374,014 3,142,552 464.45 374,876 3,198,719 464.60 375,737 3,255,015 464.75 376,599 3,311,440 464.90 377,461 3,367,994 465.05 378,249 3,424,676 465.20 378,893 3,481,462 465.35 379,536 3,538,344 465.50 380,179 3,595,323 465.65 380,822 3,652,398 465.80 381,465 3,709,569 465.95 382,109 3,766,837 466.10 382,918 3,824,210 466.25 383,810 3,881,715 466.40 384,701 3,939,353 466.55 385,593 3,997,125 466.70 386,485 4,055,031 466.85 387,377 4,113,071 467.00 388,269 4,171,244 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 29 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment1S: C1 Runoff Area=27.380 ac 0.00% Impervious Runoff Depth>3.39" Tc=5.0 min CN=80 Runoff=164.53 cfs 7.741 of Subcatchment2S: C2 Runoff Area=85.840 ac 0.00% Impervious Runoff Depth>3.59" Tc=5.0 min CN=82 Runoff=541.48 cfs 25.685 of Subcatchment3S: D1 Runoff Area=12.330 ac 0.00% Impervious Runoff Depth>3.20" Tc=5.0 min CN=78 Runoff=70.32 cfs 3.287 al Subcatchment4S: D2 Runoff Area=84.030 ac 0.00% Impervious Runoff Depth>4.00" Tc=7.0 min CN=86 Runoff=543.18 cfs 27.991 of Subcatchment5S: E1 Runoff Area=27.800 ac 0.00% Impervious Runoff Depth>3.49" Tc=6.0 min CN=81 Runoff=164.16 cfs 8.086 all Subcatchment6S: E2 Runoff Area=17.280 ac 0.00% Impervious Runoff Depth>3.69" Tc=8.0 min CN=83 Runoff=101.82 cfs 5.312 of Subcatchment7S: F1 Runoff Area=66.440 ac 0.00% Impervious Runoff Depth>4.53" Tc=11.0 min CN=91 Runoff=411.87 cfs 25.071 of Subcatchment8S: F2 Runoff Area=31.640 ac 0.00% Impervious Runoff Depth>4.53" Tc=8.0 min CN=91 Runoff=216.95 cfs 11.947 of Subcatchment9S: G1 Runoff Area=48.900 ac 0.00% Impervious Runoff Depth>4.64" Tc=14.0 min CN=92 Runoff=282.37 cfs 18.890 of Subcatchment10S: G2 Runoff Area=49.050 ac 0.00% Impervious Runoff Depth>4.64" Tc=14.0 min CN=92 Runoff=283.24 cfs 18.948 of Pond 4P: Pond 1 Peak Elev=458.34' Storage=1,345,927 cf Inflow=2,623.19 cfs 152.958 of Outflow=1,965.69 cfs 152.708 of Total Runoff Area = 450.690 ac Runoff Volume = 152.958 of Average Runoff Depth = 4.07" 100.00% Pervious = 450.690 ac 0.00% Impervious = 0.000 ac Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 30 Summary for Subcatchment 1S: C1 [49] Hint: Tc<2dt may require smaller dt Runoff = 164.53 cfs @ 11.96 hrs, Volume= 7.741 af, Depth> 3.39" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 27.380 80 27.380 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, I 13 12 0 Subcatchment 1S: C1 Hydrograph —I_1 1 L- LL I _ _I-1-1—LJ—LL—I_ 1 I I --------------- I I I I I I 1 I I I I 164.53 cfs I I I I I I --- T I 7-1-T-1-7--F7-1-T-1 I I I I- I I F 7 I I I 1 I I - I T 1 7 7 F 7 T 1 tIfi�C- rtIt- -I-t 1 t--1 rt 1 t - - + + --+ T -4 1-T - -I - I- - 1- T _ I— 1_ I_ L —1 _ 1— J 1 1 _ 1— ! _ 1 _ ! -Type U 124-hr -- 'FIIO-�Rga Ir1tf4I17"5.57j ---------------- Ruhoff Ar-6&;V.38Q ad - I I I I I I I I I I I Jbunof Volume=-rMl af- 1--u1p�I�h*3961 -T T T 1 -TC:-JJ5.(j h'lih 7 I T I F 7 7 I -F rt 1 1 pprt I t- - -t-C7Y�Q0- -i I t —I—t- - 1 1 t 1 -i I + I -f I t 1 -4 — I— + —1 — — 1— -4 — I I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 31 Hydrograph for Subcatchment 1S: Cl Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.04 7.00 0.55 0.00 0.10 7.25 0.58 0.00 0.17 7.50 0.61 0.00 0.24 7.75 0.64 0.01 0.31 8.00 0.67 0.01 0.39 8.25 0.70 0.01 0.50 8.50 0.74 0.02 0.64 8.75 0.78 0.03 0.80 9.00 0.82 0.04 0.99 9.25 0.86 0.05 1.13 9.50 0.91 0.06 1.25 9.75 0.96 0.07 1.48 10.00 1.01 0.09 1.80 10.25 1.07 0.11 2.22 10.50 1.14 0.13 2.74 10.75 1.22 0.16 3.50 11.00 1.31 0.20 4.44 11.25 1.43 0.25 6.20 11.50 1.58 0.32 8.62 11.75 2.16 0.66 48.17 12.00 3.69 1.79 141.88 12.25 3.93 1.99 20.38 12.50 4.09 2.12 13.34 12.75 4.21 2.21 10.03 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 2.29 8.41 13.25 4.38 2.36 7.30 13.50 4.45 2.42 6.42 13.75 4.51 2.47 5.70 14.00 4.57 2.52 5.06 14.25 4.62 2.56 4.71 14.50 4.67 2.60 4.49 14.75 4.71 2.64 4.27 15.00 4.75 2.68 4.05 15.25 4.79 2.71 3.83 15.50 4.83 2.75 3.60 15.75 4.87 2.78 3.37 16.00 4.90 2.81 3.14 16.25 4.93 2.83 3.02 16.50 4.96 2.86 2.94 16.75 4.99 2.89 2.86 17.00 5.02 2.91 2.78 17.25 5.05 2.94 2.70 17.50 5.08 2.96 2.62 17.75 5.10 2.98 2.53 18.00 5.13 3.01 2.45 18.25 5.15 3.03 2.37 18.50 5.18 3.05 2.29 18.75 5.20 3.07 2.21 19.00 5.22 3.09 2.12 19.25 5.24 3.11 2.04 19.50 5.26 3.13 1.96 19.75 5.28 3.14 1.87 20.00 5.30 3.16 1.79 20.25 5.32 3.17 1.75 20.50 5.34 3.19 1.74 20.75 5.36 3.21 1.72 21.00 5.37 3.22 1.71 21.25 5.39 3.24 1.69 21.50 5.41 3.25 1.67 21.75 5.43 3.27 1.66 22.00 5.44 3.28 1.64 22.25 5.46 3.30 1.63 22.50 5.47 3.31 1.61 22.75 5.49 3.33 1.59 23.00 5.51 3.34 1.58 23.25 5.52 3.35 1.56 23.50 5.54 3.37 1.54 23.75 5.55 3.38 1.53 24.00 5.57 3.40 1.51 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 32 Summary for Subcatchment 2S: C2 [49] Hint: Tc<2dt may require smaller dt Runoff = 541.48 cfs @ 11.95 hrs, Volume= 25.685 af, Depth> 3.59" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 85.840 82 85.840 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, 3 0 LL id E Subcatchment 2S: C2 Hydrograph +��fI I I —- I I I I I I I 541.48 cfs I I -1 T —1 I I F —1 I I I 1-7 I I I I I I I i I I I i i I I I I -1 F T —I I T- —1 I I F -F I I I I I I I Type II 24 br J Q'1YR Rai pf*1t=-5�157';' Runoff !Area,=MMO at -k�noff-'Volume-= 5& 5 -alf R noff D6pth"'.59'�" Tc-=&0 n1in- I I 1 Lv —1 — 4- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 33 Hydrograph for Subcatchment 2S: C2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.01 6.25 0.47 0.00 0.19 6.50 0.50 0.00 0.40 6.75 0.52 0.00 0.62 7.00 0.55 0.01 0.84 7.25 0.58 0.01 1.08 7.50 0.61 0.01 1.32 7.75 0.64 0.02 1.57 8.00 0.67 0.02 1.83 8.25 0.70 0.03 2.23 8.50 0.74 0.04 2.75 8.75 0.78 0.04 3.34 9.00 0.82 0.06 4.00 9.25 0.86 0.07 4.48 9.50 0.91 0.08 4.84 9.75 0.96 0.10 5.65 10.00 1.01 0.12 6.76 10.25 1.07 0.14 8.25 10.50 1.14 0.17 10.04 10.75 1.22 0.20 12.64 11.00 1.31 0.25 15.84 11.25 1.43 0.31 21.88 11.50 1.58 0.39 30.02 11.75 2.16 0.75 163.82 12.00 3.69 1.94 464.64 12.25 3.93 2.15 66.18 12.50 4.09 2.28 43.23 12.75 4.21 2.38 32.46 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 2.46 27.19 13.25 4.38 2.53 23.59 13.50 4.45 2.59 20.72 13.75 4.51 2.65 18.40 14.00 4.57 2.70 16.33 14.25 4.62 2.74 15.20 14.50 4.67 2.78 14.48 14.75 4.71 2.82 13.77 15.00 4.75 2.86 13.04 15.25 4.79 2.90 12.32 15.50 4.83 2.93 11.58 15.75 4.87 2.96 10.85 16.00 4.90 2.99 10.11 16.25 4.93 3.02 9.71 16.50 4.96 3.05 9.45 16.75 4.99 3.07 9.19 17.00 5.02 3.10 8.93 17.25 5.05 3.12 8.67 17.50 5.08 3.15 8.40 17.75 5.10 3.17 8.14 18.00 5.13 3.20 7.88 18.25 5.15 3.22 7.61 18.50 5.18 3.24 7.35 18.75 5.20 3.26 7.08 19.00 5.22 3.28 6.82 19.25 5.24 3.30 6.55 19.50 5.26 3.32 6.28 19.75 5.28 3.33 6.01 20.00 5.30 3.35 5.74 20.25 5.32 3.37 5.63 20.50 5.34 3.38 5.57 20.75 5.36 3.40 5.52 21.00 5.37 3.42 5.47 21.25 5.39 3.43 5.42 21.50 5.41 3.45 5.37 21.75 5.43 3.46 5.32 22.00 5.44 3.48 5.26 22.25 5.46 3.49 5.21 22.50 5.47 3.51 5.16 22.75 5.49 3.52 5.11 23.00 5.51 3.54 5.05 23.25 5.52 3.55 5.00 23.50 5.54 3.57 4.95 23.75 5.55 3.58 4.90 24.00 5.57 3.59 4.83 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 34 Summary for Subcatchment 3S: D1 [49] Hint: Tc<2dt may require smaller dt Runoff = 70.32 cfs @ 11.96 hrs, Volume= 3.287 af, Depth> 3.20" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 12.330 78 12.330 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 3S: D1 Hydrograph I I I I I I I I I I I I I I I ■Runoff 75 — — — — t — — — - fi 70.32 cfs —'t'—w — 70 - I- -L -1- -1 - L --I- 1- -L -I I I Type-IL244w 65 1 Or {�I I' 0 RaI f-#H-7"-5•57j 60 55 Ruhoff Ardat11.330 ad fi.,�-1-��`,rt 50 -4 1 4 1 -k 1 A 1 4- I IRu 1 o H/vg3.28-7-af w 45 `-' _I _ I ffID h���u � A 40 - - - - - - - - - - - - - - - - - - - - - -1 - - 0 35 1 1 1 1 1 1 1 1 1 1 1 1 T 1- 1 c�5.'0 i�i� -1 I- T I T 1 T-1 I T I -- T 1 F-1 I T I F 11 - F 30 --I1 4 1 1 --I1 4 I -- 1 -4 1 7 T 1 GN- 25 - _ I_ L _ _ L _I _ L J _ I_ L _ I _ L _I _ L - _ I_ L _ _ L _I _ L 20 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15 I T I T 1 T- 1 T -- T 1 F- 1 T I T 1 T 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 35 Hydrograph for Subcatchment 3S: D1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.00 6.75 0.52 0.00 0.00 7.00 0.55 0.00 0.00 7.25 0.58 0.00 0.01 7.50 0.61 0.00 0.04 7.75 0.64 0.00 0.07 8.00 0.67 0.00 0.10 8.25 0.70 0.01 0.14 8.50 0.74 0.01 0.19 8.75 0.78 0.01 0.25 9.00 0.82 0.02 0.33 9.25 0.86 0.03 0.39 9.50 0.91 0.04 0.44 9.75 0.96 0.05 0.53 10.00 1.01 0.06 0.66 10.25 1.07 0.08 0.83 10.50 1.14 0.10 1.04 10.75 1.22 0.12 1.35 11.00 1.31 0.16 1.73 11.25 1.43 0.20 2.46 11.50 1.58 0.27 3.46 11.75 2.16 0.57 19.88 12.00 3.69 1.65 60.96 12.25 3.93 1.83 8.83 12.50 4.09 1.96 5.80 12.75 4.21 2.05 4.36 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 2.13 3.66 13.25 4.38 2.19 3.18 13.50 4.45 2.25 2.80 13.75 4.51 2.30 2.49 14.00 4.57 2.35 2.21 14.25 4.62 2.39 2.06 14.50 4.67 2.43 1.96 14.75 4.71 2.47 1.87 15.00 4.75 2.50 1.77 15.25 4.79 2.54 1.67 15.50 4.83 2.57 1.58 15.75 4.87 2.60 1.48 16.00 4.90 2.63 1.38 16.25 4.93 2.66 1.32 16.50 4.96 2.68 1.29 16.75 4.99 2.71 1.25 17.00 5.02 2.73 1.22 17.25 5.05 2.75 1.18 17.50 5.08 2.78 1.15 17.75 5.10 2.80 1.11 18.00 5.13 2.82 1.08 18.25 5.15 2.84 1.04 18.50 5.18 2.86 1.00 18.75 5.20 2.88 0.97 19.00 5.22 2.90 0.93 19.25 5.24 2.92 0.90 19.50 5.26 2.94 0.86 19.75 5.28 2.95 0.82 20.00 5.30 2.97 0.79 20.25 5.32 2.99 0.77 20.50 5.34 3.00 0.76 20.75 5.36 3.02 0.76 21.00 5.37 3.03 0.75 21.25 5.39 3.05 0.74 21.50 5.41 3.06 0.74 21.75 5.43 3.08 0.73 22.00 5.44 3.09 0.72 22.25 5.46 3.11 0.71 22.50 5.47 3.12 0.71 22.75 5.49 3.13 0.70 23.00 5.51 3.15 0.69 23.25 5.52 3.16 0.69 23.50 5.54 3.17 0.68 23.75 5.55 3.19 0.67 24.00 5.57 3.20 0.66 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 36 Summary for Subcatchment 4S: D2 Runoff = 543.18 cfs @ 11.98 hrs, Volume= 27.991 af, Depth> 4.00" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 84.030 86 84.030 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.0 Direct Entry, 111 0 Subcatchment 4S: D2 Hydrograph --1-+-I-4----4-1-+-1- I I I I I I I I I I - - - - - I - - - - - - - - - 543.18 cfs 11 LI-1_1-1-L1 I I -I- t -I- I I r -I I I - I- -r -1- I I I -r -I I I - - +- I I I I I I T 1 -1- L _I - 1_ 1 _1 T -I L 1 I I -- I- T- I- I I r -I I I - I- rt- I I I I L I ( - - - - - - - - - - - - - - - - ( I I I I I I I I I � I 1 1 1 L -i TypelI-24 hr 10 YO Oallif�u -5�7li • Rl. "ff Areal=&4 Q3Q a'c- jt�poffV(�I IuMe=�7.01 -af- I Runoff Nap�th*4-00" - - - Tc=7J10 min- 1 1 1 Lam -1 - 1- rt -1 r -1 1 rt I I I I l l l l i -4 — I— + —1 — —1 — 1— -4 — 1— 4- —I - � 1 1 1 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 37 Hydrograph for Subcatchment 4S: D2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0.35 0.00 0.14 5.25 0.37 0.00 0.35 5.50 0.40 0.00 0.56 5.75 0.42 0.01 0.79 6.00 0.45 0.01 1.02 6.25 0.47 0.01 1.27 6.50 0.50 0.02 1.52 6.75 0.52 0.02 1.78 7.00 0.55 0.03 2.04 7.25 0.58 0.03 2.32 7.50 0.61 0.04 2.60 7.75 0.64 0.05 2.88 8.00 0.67 0.06 3.17 8.25 0.70 0.07 3.65 8.50 0.74 0.08 4.31 8.75 0.78 0.10 5.04 9.00 0.82 0.11 5.84 9.25 0.86 0.13 6.41 9.50 0.91 0.15 6.76 9.75 0.96 0.18 7.61 10.00 1.01 0.20 8.91 10.25 1.07 0.23 10.61 10.50 1.14 0.27 12.66 10.75 1.22 0.31 15.52 11.00 1.31 0.37 19.12 11.25 1.43 0.44 25.46 11.50 1.58 0.54 34.39 11.75 2.16 0.97 158.33 12.00 3.69 2.27 529.68 12.25 3.93 2.49 76.49 12.50 4.09 2.63 47.78 12.75 4.21 2.73 34.30 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 2.82 28.75 13.25 4.38 2.89 24.69 13.50 4.45 2.96 21.70 13.75 4.51 3.01 19.20 14.00 4.57 3.07 17.05 14.25 4.62 3.11 15.70 14.50 4.67 3.16 14.96 14.75 4.71 3.20 14.21 15.00 4.75 3.24 13.46 15.25 4.79 3.28 12.71 15.50 4.83 3.31 11.95 15.75 4.87 3.34 11.20 16.00 4.90 3.38 10.44 16.25 4.93 3.40 9.96 16.50 4.96 3.43 9.69 16.75 4.99 3.46 9.42 17.00 5.02 3.49 9.15 17.25 5.05 3.51 8.88 17.50 5.08 3.54 8.61 17.75 5.10 3.56 8.34 18.00 5.13 3.59 8.07 18.25 5.15 3.61 7.80 18.50 5.18 3.63 7.52 18.75 5.20 3.66 7.25 19.00 5.22 3.68 6.98 19.25 5.24 3.70 6.70 19.50 5.26 3.71 6.43 19.75 5.28 3.73 6.16 20.00 5.30 3.75 5.88 20.25 5.32 3.77 5.73 20.50 5.34 3.78 5.68 20.75 5.36 3.80 5.63 21.00 5.37 3.82 5.57 21.25 5.39 3.83 5.52 21.50 5.41 3.85 5.46 21.75 5.43 3.87 5.41 22.00 5.44 3.88 5.36 22.25 5.46 3.90 5.30 22.50 5.47 3.91 5.25 22.75 5.49 3.93 5.19 23.00 5.51 3.94 5.14 23.25 5.52 3.96 5.09 23.50 5.54 3.97 5.03 23.75 5.55 3.99 4.98 24.00 5.57 4.00 4.92 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 38 Summary for Subcatchment 5S: E1 Runoff = 164.16 cfs @ 11.97 hrs, Volume= 8.086 af, Depth> 3.49" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 27.800 81 27.800 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: E1 Hydrograph - 1 1 L 1 L- 1 1 1- �� I L I 180 _1 1 1 LJ_1_1_I_L_1 L- 1 1 1 LJ I L_1_L_1_ 170 _ 1- 1 -1 _ L _I _ 1_ 1 _ _ L 164.16 - - 1 _ L -I _ L _I _�/I_ - _ I _ L —1 _ cfs 160 _ I_ 1 -1 - 1 -1 _ 1 1 _ I- 1 -1- - ype U124-hr 1 � I " RFnfci�1l�5.157, 140 - - - - - - - - - - - - - - - - - - - - - - - 130 - - 1- -1 - - - - -1- - - Ruhoff Ar-d&:V.800 ad, 120 1 1 1 �/ 1 1 1 1 / 1}1 1 Jbulnoffl olume=9.486 of 110 w I I I I I I I 1 W1 pI _f_�1 1 I� I,' I I ulp I I 90 LL T-I 7--rTr�C��.�II�YI�Ih yI. 80 - 1- T -1 - T -1 - 1- - 1- T -1 - T -1 - - 7 -1- T 70 p-I1 Nr-:Qlr 60 - 1 t 1 L-1 fi-- -- 1- t -I t--1- I fi 1 50--+ 1--L--I---1-L-1- 40 1--4-1-4--1- 30----- 4------1-I-- 1---1-4--1- 20 ----�-I-+ 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 39 Hydrograph for Subcatchment 5S: E1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.00 6.25 0.47 0.00 0.00 6.50 0.50 0.00 0.05 6.75 0.52 0.00 0.11 7.00 0.55 0.00 0.18 7.25 0.58 0.00 0.25 7.50 0.61 0.01 0.33 7.75 0.64 0.01 0.41 8.00 0.67 0.02 0.49 8.25 0.70 0.02 0.60 8.50 0.74 0.03 0.76 8.75 0.78 0.04 0.93 9.00 0.82 0.05 1.13 9.25 0.86 0.06 1.29 9.50 0.91 0.07 1.41 9.75 0.96 0.08 1.64 10.00 1.01 0.10 1.98 10.25 1.07 0.12 2.43 10.50 1.14 0.15 2.98 10.75 1.22 0.18 3.76 11.00 1.31 0.22 4.75 11.25 1.43 0.28 6.55 11.50 1.58 0.36 9.06 11.75 2.16 0.71 46.95 12.00 3.69 1.87 155.33 12.25 3.93 2.07 21.90 12.50 4.09 2.20 14.23 12.75 4.21 2.30 10.46 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 2.38 8.78 13.25 4.38 2.44 7.58 13.50 4.45 2.51 6.67 13.75 4.51 2.56 5.92 14.00 4.57 2.61 5.26 14.25 4.62 2.65 4.87 14.50 4.67 2.69 4.64 14.75 4.71 2.73 4.41 15.00 4.75 2.77 4.18 15.25 4.79 2.80 3.95 15.50 4.83 2.84 3.72 15.75 4.87 2.87 3.48 16.00 4.90 2.90 3.25 16.25 4.93 2.93 3.11 16.50 4.96 2.95 3.03 16.75 4.99 2.98 2.94 17.00 5.02 3.01 2.86 17.25 5.05 3.03 2.78 17.50 5.08 3.05 2.69 17.75 5.10 3.08 2.61 18.00 5.13 3.10 2.53 18.25 5.15 3.12 2.44 18.50 5.18 3.14 2.36 18.75 5.20 3.16 2.27 19.00 5.22 3.18 2.19 19.25 5.24 3.20 2.10 19.50 5.26 3.22 2.02 19.75 5.28 3.24 1.93 20.00 5.30 3.25 1.85 20.25 5.32 3.27 1.80 20.50 5.34 3.29 1.79 20.75 5.36 3.30 1.77 21.00 5.37 3.32 1.75 21.25 5.39 3.33 1.74 21.50 5.41 3.35 1.72 21.75 5.43 3.36 1.70 22.00 5.44 3.38 1.69 22.25 5.46 3.39 1.67 22.50 5.47 3.41 1.65 22.75 5.49 3.42 1.64 23.00 5.51 3.44 1.62 23.25 5.52 3.45 1.60 23.50 5.54 3.47 1.59 23.75 5.55 3.48 1.57 24.00 5.57 3.49 1.55 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 40 Summary for Subcatchment 6S: E2 Runoff = 101.82 cfs @ 11.99 hrs, Volume= 5.312 af, Depth> 3.69" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 17.280 83 17.280 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 6S: E2 Hydrograph 110 I I I I I I I I I I I I I I I I I I I I I 105 82ors 100 —4— 1— + —1 — __1— I — + _4 — 1— + 1 t— --Type H 124-pr- 95 -1 - I- + -1 - t- -1 I rt - 1 I 1 I -r -irk �� I _t I- I 90 I I I I I �`i W fFAi��lifcj I�_1 85 80 - -'- -' - 1 1 -'- 1 -Runoff Ard&17.28 ad- 75 70 _ - _ _ 1- 4 -1- _ _I -� _ I_ - �- _ _ -I- L _ 1 _ I I _ 1 _I _ I_ I _ 1 _ 1 -1 -Runoff iVolume=-5.112 of �_-_1-rt-1-_fi_�-_rrt-_1-_ -4--_ u1p�Qgpfh13_09'.: 60 : 5o T_C= 8& 10 end `0 45 40 — I_ 1 —1 — L —1L 1— I L 1 —1— �+ I— 1— I L —1L ZN783: 35 -1- T -1- 14 -I I 1 -4 -1- 4 -I 1- --I 1- -4 -1 4- -1- 30 - 1- - -I - fi - I I -1 -1 - I- t - I - t- -1 - I- - I- t -1 - 25 T - 1- - -I T -1 I T - I T - -1 - 1- T - I - F - - 1- T - I- T -1 - 20 15 -- ' - -' 1 - 1 - - - - - 1 1 1 - - - - - - - - - - - - - - - 10 ----I- II —I— —————I— —'— —I— 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 41 Hydrograph for Subcatchment 6S: E2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.00 3.50 0.23 0.00 0.00 3.75 0.25 0.00 0.00 4.00 0.27 0.00 0.00 4.25 0.29 0.00 0.00 4.50 0.31 0.00 0.00 4.75 0.33 0.00 0.00 5.00 0.35 0.00 0.00 5.25 0.37 0.00 0.00 5.50 0.40 0.00 0.00 5.75 0.42 0.00 0.00 6.00 0.45 0.00 0.04 6.25 0.47 0.00 0.08 6.50 0.50 0.00 0.13 6.75 0.52 0.01 0.17 7.00 0.55 0.01 0.22 7.25 0.58 0.01 0.27 7.50 0.61 0.02 0.32 7.75 0.64 0.02 0.37 8.00 0.67 0.03 0.43 8.25 0.70 0.04 0.50 8.50 0.74 0.05 0.61 8.75 0.78 0.06 0.74 9.00 0.82 0.07 0.87 9.25 0.86 0.08 0.99 9.50 0.91 0.10 1.06 9.75 0.96 0.11 1.21 10.00 1.01 0.14 1.44 10.25 1.07 0.16 1.73 10.50 1.14 0.19 2.10 10.75 1.22 0.23 2.61 11.00 1.31 0.27 3.26 11.25 1.43 0.34 4.38 11.50 1.58 0.42 6.03 11.75 2.16 0.80 26.71 12.00 3.69 2.02 101.38 12.25 3.93 2.23 16.41 12.50 4.09 2.37 9.71 12.75 4.21 2.47 6.86 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 2.55 5.75 13.25 4.38 2.62 4.93 13.50 4.45 2.68 4.34 13.75 4.51 2.74 3.83 14.00 4.57 2.79 3.41 14.25 4.62 2.83 3.13 14.50 4.67 2.87 2.98 14.75 4.71 2.91 2.83 15.00 4.75 2.95 2.69 15.25 4.79 2.99 2.54 15.50 4.83 3.02 2.39 15.75 4.87 3.06 2.24 16.00 4.90 3.09 2.09 16.25 4.93 3.11 1.99 16.50 4.96 3.14 1.93 16.75 4.99 3.17 1.88 17.00 5.02 3.19 1.83 17.25 5.05 3.22 1.77 17.50 5.08 3.24 1.72 17.75 5.10 3.27 1.67 18.00 5.13 3.29 1.61 18.25 5.15 3.31 1.56 18.50 5.18 3.34 1.51 18.75 5.20 3.36 1.45 19.00 5.22 3.38 1.40 19.25 5.24 3.40 1.34 19.50 5.26 3.41 1.29 19.75 5.28 3.43 1.23 20.00 5.30 3.45 1.18 20.25 5.32 3.47 1.15 20.50 5.34 3.48 1.14 20.75 5.36 3.50 1.13 21.00 5.37 3.51 1.11 21.25 5.39 3.53 1.10 21.50 5.41 3.55 1.09 21.75 5.43 3.56 1.08 22.00 5.44 3.58 1.07 22.25 5.46 3.59 1.06 22.50 5.47 3.61 1.05 22.75 5.49 3.62 1.04 23.00 5.51 3.64 1.03 23.25 5.52 3.65 1.02 23.50 5.54 3.67 1.01 23.75 5.55 3.68 1.00 24.00 5.57 3.69 0.99 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 42 Summary for Subcatchment 7S: F1 Runoff = 411.87 cfs @ 12.02 hrs, Volume= 25.071 af, Depth> 4.53" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 66.440 91 66.440 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 11.0 Direct Entry, Subcatchment 7S: F1 Hydrograph yUu 1 I I 1 I 440 - - - - - 420 400 1 A 411.87 cfs Type 41 -24-hr -L 1 - ��- + 360 � Imo. fi Rlaj " "I� � I""'' L I - - I- t - I - t- -1 - I- I - fi -I - 340 RU-fi-off /� r� 66--C 01 �� L� 1 1�11 �FSI 320 300 1 I ,�I kU 1noif-Vo(u et�.Q71Lof I - II - I - - - I -I - I- I - I - I -I - 280 -1 1 1 L-1 1 - 1 L I w 260 �240 Ruftoff-ieOth>�n" T 1 -4 � t--t T 1 � I t 1 -1 fi I t I I I t I 1--1-I--t-I-T-1- c220 Tc=94.81mm-i F-T 1 T-' I T I t--1 T-I-T-1- a 200 180 w-'��J� 1 OI�31-1-I------- -------- - - - - --- 160 - - I- 1 -I - 1 -I - I- 1 -I- - I- 1 - I - 1 -I - I- 1 - I- 1 -I - 140 -1- 4- -1- -1 - I- -I- 4- A -I- -I- � -1 - I- -1- -1- 120+ T -iI+IF�-f1T1 100 t fi rt--t- I I t-I 1--1 rt I T-I- 80 60 A - - - - - - - - - - - - - - I - 1- - -1 I -1 - - I - - - - I - I - - - - - - - - - - I- I - - - - - - I -I - 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 43 Hydrograph for Subcatchment 7S: F1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.02 3.50 0.23 0.00 0.18 3.75 0.25 0.00 0.36 4.00 0.27 0.00 0.54 4.25 0.29 0.01 0.73 4.50 0.31 0.01 0.92 4.75 0.33 0.02 1.13 5.00 0.35 0.02 1.34 5.25 0.37 0.03 1.56 5.50 0.40 0.03 1.79 5.75 0.42 0.04 2.02 6.00 0.45 0.05 2.26 6.25 0.47 0.06 2.50 6.50 0.50 0.07 2.74 6.75 0.52 0.08 2.99 7.00 0.55 0.09 3.24 7.25 0.58 0.11 3.49 7.50 0.61 0.12 3.75 7.75 0.64 0.14 4.01 8.00 0.67 0.15 4.26 8.25 0.70 0.17 4.67 8.50 0.74 0.19 5.36 8.75 0.78 0.21 6.10 9.00 0.82 0.24 6.88 9.25 0.86 0.27 7.49 9.50 0.91 0.30 7.75 9.75 0.96 0.33 8.33 10.00 1.01 0.36 9.54 10.25 1.07 0.41 11.04 10.50 1.14 0.46 12.94 10.75 1.22 0.52 15.36 11.00 1.31 0.59 18.59 11.25 1.43 0.68 23.54 11.50 1.58 0.80 31.32 11.75 2.16 1.30 105.53 12.00 3.69 2.72 405.61 12.25 3.93 2.95 100.23 12.50 4.09 3.11 45.75 12.75 4.21 3.21 30.32 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 3.31 25.06 13.25 4.38 3.38 21.20 13.50 4.45 3.45 18.62 13.75 4.51 3.51 16.37 14.00 4.57 3.56 14.56 14.25 4.62 3.61 13.19 14.50 4.67 3.66 12.52 14.75 4.71 3.70 11.89 15.00 4.75 3.74 11.26 15.25 4.79 3.78 10.64 15.50 4.83 3.82 10.01 15.75 4.87 3.85 9.38 16.00 4.90 3.89 8.75 16.25 4.93 3.92 8.27 16.50 4.96 3.95 8.03 16.75 4.99 3.98 7.80 17.00 5.02 4.00 7.58 17.25 5.05 4.03 7.36 17.50 5.08 4.06 7.13 17.75 5.10 4.08 6.91 18.00 5.13 4.11 6.68 18.25 5.15 4.13 6.46 18.50 5.18 4.16 6.23 18.75 5.20 4.18 6.01 19.00 5.22 4.20 5.78 19.25 5.24 4.22 5.56 19.50 5.26 4.24 5.33 19.75 5.28 4.26 5.10 20.00 5.30 4.28 4.88 20.25 5.32 4.29 4.72 20.50 5.34 4.31 4.66 20.75 5.36 4.33 4.62 21.00 5.37 4.35 4.57 21.25 5.39 4.36 4.53 21.50 5.41 4.38 4.49 21.75 5.43 4.40 4.44 22.00 5.44 4.41 4.40 22.25 5.46 4.43 4.35 22.50 5.47 4.44 4.31 22.75 5.49 4.46 4.26 23.00 5.51 4.48 4.22 23.25 5.52 4.49 4.17 23.50 5.54 4.51 4.13 23.75 5.55 4.52 4.08 24.00 5.57 4.54 4.03 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 44 Summary for Subcatchment 8S: F2 Runoff = 216.95 cfs @ 11.99 hrs, Volume= 11.947 af, Depth> 4.53" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 31.640 91 31.640 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 8S: F2 Hydrograph I+1+-I+IL --I+I+I 240 7 - I- T -1- T -1 - 1- 7 -1- T -1- T- - -1- T -I- T -1 - - 7 -1- 1 230 220 - - - - 1- - - 1 - - 1 I - - - 216 96 o1s - 1 1 1 1 I 1 - - 210 L- I 1 1 L I I 1 1 - 1 L 1 � Ty --pelf -2# ar 200 -1190 - jj1t- T 1 T--1F 7 I T 1 I QI 'T� a��f p I� �I 170 -1- -1- - -1 - 1- - -1- -1 - ArPa1=31T640 at - 150 L- I 1 1 L� -+ I 1 1 R"i� IRL�n-c�ff off VQJ m� J �4� a� 150 � I + I � � � � - I � I � �M u IL 140 7-1-T-1-T-1-r-7-1-T-1 -1_-1_TRllJmbffDlepAh*4531'r u 130 1 1 1 1 1 1 1 1 1 1 o 110 1 _1 I 1 I L-1 L 1 I L 1 -1 I _1 1 1 1 L -1C�BJO m-�m LL 100 -4 - I- + -1 - 4- -I - I- - I - + -1 -4 - I- + - I - -I - I- -4 90 7 I T I T--1r- 7 I T I 7 I T I L-1 7 �I1 80 - - - - - - - - - - 70 60-1-1-1-L-1-I-L-I-L -_1-L-I-L-1-I-L-I-L-1_ 50 +-I-+-1-+-1-I-+-I-+ ---+-I----1-+-1-+-1- 40 7 - 1 -1 - 7 -1 - 1- 7 - I - 1- 7 - 1- T -1 - 30 - - - - - - - - - - - - - - - - 20 - - - - - - - - - - - - - - - - - - - - - - - - - - - 10 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 45 Hydrograph for Subcatchment 8S: F2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.00 3.25 0.21 0.00 0.02 3.50 0.23 0.00 0.10 3.75 0.25 0.00 0.19 4.00 0.27 0.00 0.27 4.25 0.29 0.01 0.36 4.50 0.31 0.01 0.46 4.75 0.33 0.02 0.56 5.00 0.35 0.02 0.66 5.25 0.37 0.03 0.76 5.50 0.40 0.03 0.87 5.75 0.42 0.04 0.98 6.00 0.45 0.05 1.10 6.25 0.47 0.06 1.21 6.50 0.50 0.07 1.33 6.75 0.52 0.08 1.45 7.00 0.55 0.09 1.57 7.25 0.58 0.11 1.69 7.50 0.61 0.12 1.81 7.75 0.64 0.14 1.93 8.00 0.67 0.15 2.05 8.25 0.70 0.17 2.28 8.50 0.74 0.19 2.61 8.75 0.78 0.21 2.97 9.00 0.82 0.24 3.35 9.25 0.86 0.27 3.60 9.50 0.91 0.30 3.71 9.75 0.96 0.33 4.06 10.00 1.01 0.36 4.65 10.25 1.07 0.41 5.41 10.50 1.14 0.46 6.34 10.75 1.22 0.52 7.58 11.00 1.31 0.59 9.15 11.25 1.43 0.68 11.82 11.50 1.58 0.80 15.63 11.75 2.16 1.30 64.50 12.00 3.69 2.72 215.31 12.25 3.93 2.95 33.48 12.50 4.09 3.11 19.60 12.75 4.21 3.21 13.78 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 3.31 11.52 13.25 4.38 3.38 9.84 13.50 4.45 3.45 8.64 13.75 4.51 3.51 7.63 14.00 4.57 3.56 6.77 14.25 4.62 3.61 6.21 14.50 4.67 3.66 5.90 14.75 4.71 3.70 5.61 15.00 4.75 3.74 5.31 15.25 4.79 3.78 5.01 15.50 4.83 3.82 4.71 15.75 4.87 3.85 4.41 16.00 4.90 3.89 4.11 16.25 4.93 3.92 3.91 16.50 4.96 3.95 3.80 16.75 4.99 3.98 3.70 17.00 5.02 4.00 3.59 17.25 5.05 4.03 3.48 17.50 5.08 4.06 3.38 17.75 5.10 4.08 3.27 18.00 5.13 4.11 3.16 18.25 5.15 4.13 3.06 18.50 5.18 4.16 2.95 18.75 5.20 4.18 2.84 19.00 5.22 4.20 2.73 19.25 5.24 4.22 2.63 19.50 5.26 4.24 2.52 19.75 5.28 4.26 2.41 20.00 5.30 4.28 2.30 20.25 5.32 4.29 2.24 20.50 5.34 4.31 2.22 20.75 5.36 4.33 2.20 21.00 5.37 4.35 2.17 21.25 5.39 4.36 2.15 21.50 5.41 4.38 2.13 21.75 5.43 4.40 2.11 22.00 5.44 4.41 2.09 22.25 5.46 4.43 2.07 22.50 5.47 4.44 2.05 22.75 5.49 4.46 2.03 23.00 5.51 4.48 2.00 23.25 5.52 4.49 1.98 23.50 5.54 4.51 1.96 23.75 5.55 4.52 1.94 24.00 5.57 4.54 1.92 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 46 Summary for Subcatchment 9S: G1 Runoff = 282.37 cfs @ 12.05 hrs, Volume= 18.890 af, Depth> 4.64" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 48.900 92 48.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.0 Direct Entry, Subcatchment 9S: G1 Hydrograph 300 7 -1- T -1- 7 -1 - 1- 7 -1- T -1- 7 - -I- T -I- T -I - I- 7 -1- T -1- 280 - - 1- + -I - -I - I- - - Tyke II 24'h ri L 1 L- - 1 1 1 L-1 - 1 I L 1 260 do-* Ri1 i4a;l1=;5. -11- 240 220 Y Ru olf 14r�a� -9001a 1 - 1- 1 - I - 1 -1 - 1 7 - 1 1 - 200 [ u,ylnorf Im-e:F 9Q of ,_ 11 11_ _ _Vm9w _ _ _, _ _ 1 w 180 l,�. Rut &f -De - l>�V�F" 1 I I - I- I - I - I -I - I- - 1- -I - " 160 3 I I I I I I Tc�l 4.01 min 1 - 1 - 1 1 1 1 - I I I 1- 1 -1 I I - 1 -1 - I I I 1 1 1 1 - 1- 1 -1 - LL 140 120 I � I-n - _-+-I-I-+-1-+-I -I-+-- -I-I-+- 100 80 60 -7 7 40 - 1- - -1 - t - - - t - I - - - - 1- - - t -1 - 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 47 Hydrograph for Subcatchment 9S: G1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.04 3.25 0.21 0.00 0.17 3.50 0.23 0.00 0.31 3.75 0.25 0.01 0.45 4.00 0.27 0.01 0.59 4.25 0.29 0.01 0.73 4.50 0.31 0.02 0.89 4.75 0.33 0.02 1.05 5.00 0.35 0.03 1.21 5.25 0.37 0.04 1.38 5.50 0.40 0.05 1.56 5.75 0.42 0.05 1.74 6.00 0.45 0.06 1.92 6.25 0.47 0.08 2.10 6.50 0.50 0.09 2.28 6.75 0.52 0.10 2.47 7.00 0.55 0.11 2.66 7.25 0.58 0.13 2.85 7.50 0.61 0.14 3.04 7.75 0.64 0.16 3.23 8.00 0.67 0.18 3.42 8.25 0.70 0.20 3.69 8.50 0.74 0.22 4.20 8.75 0.78 0.25 4.76 9.00 0.82 0.27 5.36 9.25 0.86 0.30 5.86 9.50 0.91 0.34 6.07 9.75 0.96 0.37 6.41 10.00 1.01 0.41 7.28 10.25 1.07 0.45 8.36 10.50 1.14 0.51 9.77 10.75 1.22 0.57 11.49 11.00 1.31 0.64 13.85 11.25 1.43 0.74 17.19 11.50 1.58 0.87 22.80 11.75 2.16 1.38 62.54 12.00 3.69 2.82 255.98 12.25 3.93 3.05 106.16 12.50 4.09 3.21 40.11 12.75 4.21 3.32 23.96 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 3.41 19.30 13.25 4.38 3.49 16.17 13.50 4.45 3.55 14.16 13.75 4.51 3.61 12.42 14.00 4.57 3.67 11.04 14.25 4.62 3.72 9.92 14.50 4.67 3.76 9.37 14.75 4.71 3.81 8.90 15.00 4.75 3.85 8.43 15.25 4.79 3.89 7.97 15.50 4.83 3.93 7.50 15.75 4.87 3.96 7.04 16.00 4.90 3.99 6.57 16.25 4.93 4.02 6.17 16.50 4.96 4.05 5.98 16.75 4.99 4.08 5.81 17.00 5.02 4.11 5.64 17.25 5.05 4.14 5.48 17.50 5.08 4.17 5.31 17.75 5.10 4.19 5.14 18.00 5.13 4.22 4.98 18.25 5.15 4.24 4.81 18.50 5.18 4.26 4.64 18.75 5.20 4.29 4.48 19.00 5.22 4.31 4.31 19.25 5.24 4.33 4.14 19.50 5.26 4.35 3.98 19.75 5.28 4.37 3.81 20.00 5.30 4.39 3.64 20.25 5.32 4.40 3.51 20.50 5.34 4.42 3.46 20.75 5.36 4.44 3.42 21.00 5.37 4.45 3.39 21.25 5.39 4.47 3.36 21.50 5.41 4.49 3.33 21.75 5.43 4.51 3.29 22.00 5.44 4.52 3.26 22.25 5.46 4.54 3.23 22.50 5.47 4.55 3.19 22.75 5.49 4.57 3.16 23.00 5.51 4.59 3.13 23.25 5.52 4.60 3.09 23.50 5.54 4.62 3.06 23.75 5.55 4.63 3.02 24.00 5.57 4.65 2.99 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 48 Summary for Subcatchment 10S: G2 Runoff = 283.24 cfs @ 12.05 hrs, Volume= 18.948 af, Depth> 4.64" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10 YR Rainfall=5.57" Area (ac) CN Description 49.050 92 49.050 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.0 Direct Entry, Subcatchment 10S: G2 Hydrograph 300 -I- 280 --1-+-1-4--1-1- 4 -- zsa.zaors Type 11pp24-hr - 1- I -1- i -I-4-1--I-I---1-4--1- _ 1_ I _ _ 1 -1 - 1- I _ 1_ i _I 260 10-* nfal1 F �,i 11 240 220 Ra1 I_ • p Runoff Alreaft4g050196 - I- T - I - T 1 T - 1- T -1 - 200 I J- uno f Vow ume�1cl,�.94$ of -i-I-t-I-f--1-I--f-1-fi-1- -j -L -1 - L -1 - 1- -1 - 1- L -1 - N 180 Runoff- eOth>4-64"1- - - -I- 3 160 M 140 TC�14.�11r�Fn-I - ;- _I - I- -1I- I -I - 1I - 120 Ni 9 - -1_ 4- -I - I- 4 -1- + -i 1_ _1_ _1 _ 1_ -4 _ 100 80 60 40 T I I T l I I I I I - I- - -I - - 1 1 - - + - - - - - I- -t - - 4- -1 - 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 49 Hydrograph for Subcatchment 10S: G2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.01 0.00 0.00 0.50 0.03 0.00 0.00 0.75 0.04 0.00 0.00 1.00 0.06 0.00 0.00 1.25 0.07 0.00 0.00 1.50 0.09 0.00 0.00 1.75 0.11 0.00 0.00 2.00 0.12 0.00 0.00 2.25 0.14 0.00 0.00 2.50 0.16 0.00 0.00 2.75 0.17 0.00 0.00 3.00 0.19 0.00 0.04 3.25 0.21 0.00 0.17 3.50 0.23 0.00 0.31 3.75 0.25 0.01 0.45 4.00 0.27 0.01 0.59 4.25 0.29 0.01 0.73 4.50 0.31 0.02 0.89 4.75 0.33 0.02 1.05 5.00 0.35 0.03 1.22 5.25 0.37 0.04 1.39 5.50 0.40 0.05 1.56 5.75 0.42 0.05 1.74 6.00 0.45 0.06 1.92 6.25 0.47 0.08 2.11 6.50 0.50 0.09 2.29 6.75 0.52 0.10 2.48 7.00 0.55 0.11 2.67 7.25 0.58 0.13 2.86 7.50 0.61 0.14 3.05 7.75 0.64 0.16 3.24 8.00 0.67 0.18 3.43 8.25 0.70 0.20 3.71 8.50 0.74 0.22 4.21 8.75 0.78 0.25 4.78 9.00 0.82 0.27 5.37 9.25 0.86 0.30 5.88 9.50 0.91 0.34 6.09 9.75 0.96 0.37 6.43 10.00 1.01 0.41 7.30 10.25 1.07 0.45 8.39 10.50 1.14 0.51 9.80 10.75 1.22 0.57 11.52 11.00 1.31 0.64 13.90 11.25 1.43 0.74 17.24 11.50 1.58 0.87 22.87 11.75 2.16 1.38 62.73 12.00 3.69 2.82 256.76 12.25 3.93 3.05 106.48 12.50 4.09 3.21 40.23 12.75 4.21 3.32 24.03 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 4.30 3.41 19.36 13.25 4.38 3.49 16.22 13.50 4.45 3.55 14.20 13.75 4.51 3.61 12.46 14.00 4.57 3.67 11.07 14.25 4.62 3.72 9.95 14.50 4.67 3.76 9.39 14.75 4.71 3.81 8.92 15.00 4.75 3.85 8.46 15.25 4.79 3.89 7.99 15.50 4.83 3.93 7.52 15.75 4.87 3.96 7.06 16.00 4.90 3.99 6.59 16.25 4.93 4.02 6.19 16.50 4.96 4.05 6.00 16.75 4.99 4.08 5.83 17.00 5.02 4.11 5.66 17.25 5.05 4.14 5.49 17.50 5.08 4.17 5.33 17.75 5.10 4.19 5.16 18.00 5.13 4.22 4.99 18.25 5.15 4.24 4.83 18.50 5.18 4.26 4.66 18.75 5.20 4.29 4.49 19.00 5.22 4.31 4.32 19.25 5.24 4.33 4.16 19.50 5.26 4.35 3.99 19.75 5.28 4.37 3.82 20.00 5.30 4.39 3.65 20.25 5.32 4.40 3.52 20.50 5.34 4.42 3.47 20.75 5.36 4.44 3.44 21.00 5.37 4.45 3.40 21.25 5.39 4.47 3.37 21.50 5.41 4.49 3.34 21.75 5.43 4.51 3.30 22.00 5.44 4.52 3.27 22.25 5.46 4.54 3.24 22.50 5.47 4.55 3.20 22.75 5.49 4.57 3.17 23.00 5.51 4.59 3.13 23.25 5.52 4.60 3.10 23.50 5.54 4.62 3.07 23.75 5.55 4.63 3.03 24.00 5.57 4.65 3.00 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 50 Summary for Pond 4P: Pond 1 [44] Hint: Outlet device #2 is below defined storage Inflow Area = 450.690 ac, 0.00% Impervious, Inflow Depth > 4.07" for 10 YR event Inflow = 2,623.19 cfs @ 11.98 hrs, Volume= 152.958 of Outflow = 1,965.69 cfs @ 12.06 hrs, Volume= 152.708 af, Atten= 25%, Lag= 4.7 min Primary = 1,965.69 cfs @ 12.06 hrs, Volume= 152.708 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 458.34' @ 12.06 hrs Surf.Area= 248,912 sf Storage= 1,345,927 cf Plug -Flow detention time=16.7 min calculated for 152.391 of (100% of inflow) Center -of -Mass det. time= 15.6 min ( 809.5 - 793.9 ) Volume Invert Avail.Storage Storage Description #1 452.00' 4,171,244 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 452.00 161,235 0 0 453.00 184,727 172,981 172,981 454.00 202,532 193,630 366,611 455.00 212,990 207,761 574,372 456.00 222,197 217,594 791,965 457.00 235,826 229,012 1,020,977 458.00 245,304 240,565 1,261,542 459.00 255,870 250,587 1,512,129 460.00 267,777 261,824 1,773,952 461.00 278,902 273,340 2,047,292 462.00 291,119 285,011 2,332,302 463.00 366,599 328,859 2,661,161 464.00 372,291 369,445 3,030,606 465.00 378,035 375,163 3,405,769 466.00 382,323 380,179 3,785,948 467.00 388,269 385,296 4,171,244 Device Routinq Invert Outlet Devices #1 Primary 435.10' 108.0" W x 120.0" H Box Culvert X 2.00 L= 131.5' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 435.10' / 434.52' S= 0.0044 '/' Cc= 0.900 n= 0.013, Flow Area= 90.00 sf #2 Device 1 435.70' 24.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 452.22' 23.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) #4 Device 1 455.90' 66.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) #5 Primary 461.00' 55.0' long x 20.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Existing Type 1l 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 51 Primary OutFlow Max=1,932.79 cfs @ 12.06 hrs HW=458.30' (Free Discharge) 1=Culvert (Passes 1,932.79 cfs of 3,685.38 cfs potential flow) P4=S =Orifice/Grate (Orifice Controls 70.30 cfs @ 22.38 fps) =Sharp -Crested Rectangular Weir(Weir Controls 1,067.24 cfs @ 8.06 fps) harp -Crested Rectangular Weir(Weir Controls 795.25 cfs @ 5.06 fps) 5=Broad-Crested Rectangular Weir( Controls 0.00 cfs) Pond 4P: Pond 1 Hydrograph 2,800 -t — — I - — I — t -t z,s ' -tI L — — — I I L- 2,600 2,400 I � 2,200 T 2,000 I � 4 1 F I t-f.sss.s L _1_ L 1 _I_ L L _I_ L_ 1,800 N i t I I I I I I I I I v 1,600 c 1,400 T 1 T 7 1 — T 1 - �` 1,200 -41 — 4 1 - 1,000 i l 800 600 i 400 I I ■ Inflow z3.19 cfs -1 — I— t , i I — I— ❑ Primary 1 InflowAreaF45o6BQ1 ac 1 Pr ak �l v= $8.l3-� - Storage=1,345-,927i of I_J_I_L_I_I_L_I_' I I I I I I I I I I I I T- T 1 1 T 1 I I I I I I I 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Existing Type // 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 52 Pond 4P: Pond 1 Stage -Discharge 467 466 - - - - - - - - - - - - - - - - - - - - - - 465 464 I I I t- - - - -- 463 - - - - L- 462 - Broad -Crested Rectangular Weir- - d 461 w----r-- -�-----1-----1--- c 460- 'a 459 > - - - - - - - - - - - - - - - - w 458 1 - - - - - - - - - - - - - - - - - - I I I 457 Sharp -Crested Rectangular Weir - - 4 - - - - -I- 456 455 454- -- 453- _ Sharp -Crested Rectangular Weir 452 0 1,000 2,000 3,000 4,000 5,600 6,000 Discharge (cfs) Pond 4P: Pond 1 Stage -Area -Storage Surface/Horizontal/Wetted Area (sq-ft) 0 50,000 100,000 150,000 200.000 250.001 467 It 1-1 1 1 I I I fi 1 fi 1 1 1+ H - 466 465 - L _ _ _ 11 _ _ _1_1_ _ _1- I_ I 464 II 463 II 462 II 1 1 a 461 � 460 - - IT - - 1-1- I - - I - 7 - I - I - -1 - 459 � it I� I I fi fi I 1 >>' I+ I I t I � 458 15 1� I I I I 1- 1 J 1 1 - 457 L _ _ i - . - _ _ I - I_ -1 - L - -1 _ 1 _ -1 _ -1 - J - 456 i l 455 II 454 453 Custom Stage Data 452 0 500,000 1,000,000 1,500,000 2,000,000 2,500,000 3,000,000 3,500,000 4,000,000 Storage (cubic -feet) ❑ Primary e Surface ❑ Storage Existing Type // 24-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 53 Hydrograph for Pond 4P: Pond 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 452.00 0.00 0.50 0.00 0 452.00 0.00 1.00 0.00 0 452.00 0.00 1.50 0.00 0 452.00 0.00 2.00 0.00 0 452.00 0.00 2.50 0.00 0 452.00 0.00 3.00 0.07 11 452.00 0.03 3.50 0.90 273 452.00 0.66 4.00 1.99 717 452.00 1.74 4.50 3.16 1,186 452.01 2.88 5.00 4.58 1,732 452.01 4.21 5.50 6.35 2,442 452.01 5.94 6.00 8.26 3,211 452.02 7.81 6.50 10.73 4,173 452.03 10.15 7.00 13.52 5,294 452.03 12.87 7.50 16.49 6,497 452.04 15.80 8.00 19.57 7,755 452.05 18.86 8.50 25.64 9,862 452.06 23.98 9.00 34.12 13,202 452.08 32.10 9.50 39.38 15,830 452.10 38.50 10.00 50.32 19,406 452.12 47.19 10.50 70.41 28,334 452.17 59.50 11.00 104.65 72,125 452.43 67.56 11.50 184.21 169,847 452.98 110.87 12.00 2,587.53 1,253,008 457.97 1,690.42 12.50 279.78 715,028 455.65 529.66 13.00 157.78 400,944 454.17 264.44 13.50 118.26 267,189 453.50 169.46 14.00 92.77 194,863 453.12 124.90 14.50 80.70 148,899 452.87 99.99 15.00 72.66 120,255 452.71 86.31 15.50 64.57 97,520 452.58 76.61 16.00 56.43 75,720 452.45 68.60 16.50 52.13 54,544 452.33 62.82 17.00 49.24 36,039 452.22 59.59 17.50 46.34 20,049 452.12 48.76 18.00 43.43 18,141 452.11 44.12 18.50 40.51 16,933 452.10 41.18 19.00 37.58 15,729 452.10 38.25 19.50 34.64 14,522 452.09 35.32 20.00 31.70 13,312 452.08 32.37 20.50 30.49 12,604 452.08 30.65 21.00 29.91 12,353 452.08 30.04 21.50 29.33 12,116 452.07 29.46 22.00 28.76 11,879 452.07 28.89 22.50 28.18 11,641 452.07 28.31 23.00 27.59 11,402 452.07 27.73 23.50 27.01 11,163 452.07 27.15 24.00 26.40 10,922 452.07 26.56 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 54 Elevation Primary (feet) (cfs) 452.00 0.00 452.15 59.46 452.30 61.45 452.45 68.31 452.60 77.88 452.75 89.49 452.90 102.81 453.05 117.63 453.20 133.79 453.35 151.18 453.50 169.70 453.65 189.29 453.80 209.87 453.95 231.39 454.10 253.80 454.25 277.06 454.40 301.13 454.55 325.98 454.70 351.58 454.85 377.89 455.00 404.89 455.15 432.57 455.30 460.89 455.45 489.83 455.60 519.38 455.75 549.52 455.90 580.23 456.05 624.03 456.20 678.73 456.35 740.69 456.50 808.60 456.65 881.67 456.80 959.41 456.95 1,041.41 457.10 1,127.37 457.25 1,217.06 457.40 1,310.25 457.55 1,406.79 457.70 1,506.52 457.85 1,609.29 458.00 1,715.01 458.15 1,823.55 458.30 1,934.82 458.45 2,048.74 458.60 2,165.22 458.75 2,284.19 458.90 2,405.58 459.05 2,529.32 459.20 2,655.36 459.35 2,783.64 459.50 2,914.10 459.65 3,046.70 Stage -Discharge for Pond 4P: Pond 1 Elevation Primary (feet) (cfs) 459.80 3,181.39 459.95 3,318.12 460.10 3,456.85 460.25 3,597.54 460.40 3,740.16 460.55 3,884.66 460.70 3,923.93 460.85 3,938.33 461.00 3,952.68 461.15 3,975.54 461.30 4,005.53 461.45 4,040.24 461.60 4,078.57 461.75 4,118.49 461.90 4,161.42 462.05 4,207.46 462.20 4,256.49 462.35 4,307.27 462.50 4,359.60 462.65 4,413.73 462.80 4,470.23 462.95 4,528.50 463.10 4,588.47 463.25 4,650.08 463.40 4,713.27 463.55 4,777.99 463.70 4,844.20 463.85 4,911.85 464.00 4,980.90 464.15 5,051.32 464.30 5,123.07 464.45 5,196.13 464.60 5,270.46 464.75 5,346.03 464.90 5,422.82 465.05 5,500.81 465.20 5,579.97 465.35 5,660.28 465.50 5,741.73 465.65 5,824.28 465.80 5,907.93 465.95 5,992.65 466.10 6,078.44 466.25 6,165.26 466.40 6,253.12 466.55 6,341.99 466.70 6,431.85 466.85 6,522.71 467.00 6,614.53 Existing Type 1124-hr 10 YR Rainfall=5.57" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 55 Stage -Area -Storage for Pond 4P: Pond 1 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 452.00 161,235 0 452.15 164,759 24,450 452.30 168,283 49,428 452.45 171,806 74,934 452.60 175,330 100,970 452.75 178,854 127,533 452.90 182,378 154,626 453.05 185,617 182,240 453.20 188,288 210,282 453.35 190,959 238,726 453.50 193,630 267,570 453.65 196,300 296,815 453.80 198,971 326,460 453.95 201,642 356,506 454.10 203,578 386,916 454.25 205,147 417,570 454.40 206,715 448,460 454.55 208,284 479,585 454.70 209,853 510,945 454.85 211,421 542,541 455.00 212,990 574,372 455.15 214,371 606,424 455.30 215,752 638,683 455.45 217,133 671,149 455.60 218,514 703,823 455.75 219,895 736,703 455.90 221,276 769,791 456.05 222,878 803,092 456.20 224,923 836,677 456.35 226,967 870,569 456.50 229,012 904,767 456.65 231,056 939,272 456.80 233,100 974,084 456.95 235,145 1,009,202 457.10 236,774 1,044,606 457.25 238,196 1,080,229 457.40 239,617 1,116,065 457.55 241,039 1,152,114 457.70 242,461 1,188,377 457.85 243,882 1,224,853 458.00 245,304 1,261,542 458.15 246,889 1,298,456 458.30 248,474 1,335,608 458.45 250,059 1,372,998 458.60 251,644 1,410,626 458.75 253,229 1,448,491 458.90 254,813 1,486,594 459.05 256,465 1,524,937 459.20 258,251 1,563,541 459.35 260,037 1,602,412 459.50 261,824 1,641,552 459.65 263,610 1,680,959 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 459.80 265,396 1,720,635 459.95 267,182 1,760,578 460.10 268,890 1,800,785 460.25 270,558 1,841,244 460.40 272,227 1,881,953 460.55 273,896 1,922,912 460.70 275,564 1,964,122 460.85 277,233 2,005,581 461.00 278,902 2,047,292 461.15 280,735 2,089,264 461.30 282,567 2,131,512 461.45 284,400 2,174,034 461.60 286,232 2,216,832 461.75 288,065 2,259,904 461.90 289,897 2,303,251 462.05 294,893 2,346,952 462.20 306,215 2,392,035 462.35 317,537 2,438,817 462.50 328,859 2,487,297 462.65 340,181 2,537,474 462.80 351,503 2,589,351 462.95 362,825 2,642,925 463.10 367,168 2,697,849 463.25 368,022 2,752,989 463.40 368,876 2,808,256 463.55 369,730 2,863,651 463.70 370,583 2,919,175 463.85 371,437 2,974,826 464.00 372,291 3,030,606 464.15 373,153 3,086,514 464.30 374,014 3,142,552 464.45 374,876 3,198,719 464.60 375,737 3,255,015 464.75 376,599 3,311,440 464.90 377,461 3,367,994 465.05 378,249 3,424,676 465.20 378,893 3,481,462 465.35 379,536 3,538,344 465.50 380,179 3,595,323 465.65 380,822 3,652,398 465.80 381,465 3,709,569 465.95 382,109 3,766,837 466.10 382,918 3,824,210 466.25 383,810 3,881,715 466.40 384,701 3,939,353 466.55 385,593 3,997,125 466.70 386,485 4,055,031 466.85 387,377 4,113,071 467.00 388,269 4,171,244 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 56 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment1S: C1 Runoff Area=27.380 ac 0.00% Impervious Runoff Depth>6.70" Tc=5.0 min CN=80 Runoff=313.57 cfs 15.278 of Subcatchment2S: C2 Runoff Area=85.840 ac 0.00% Impervious Runoff Depth>6.94" Tc=5.0 min CN=82 Runoff=1,008.86 cfs 49.666 of Subcatchment3S: D1 Runoff Area=12.330 ac 0.00% Impervious Runoff Depth>6.45" Tc=5.0 min CN=78 Runoff=137.26 cfs 6.626 at Subcatchment4S: D2 Runoff Area=84.030 ac 0.00% Impervious Runoff Depth>7.43" Tc=7.0 min CN=86 Runoff=971.07 cfs 52.043 of Subcatchment5S: E1 Runoff Area=27.800 ac 0.00% Impervious Runoff Depth>6.82" Tc=6.0 min CN=81 Runoff=309.78 cfs 15.795 of Subcatchment6S: E2 Runoff Area=17.280 ac 0.00% Impervious Runoff Depth>7.06" Tc=8.0 min CN=83 Runoff=188.03 cfs 10.169 of Subcatchment7S: F1 Runoff Area=66.440 ac 0.00% Impervious Runoff Depth>8.04" Tc=11.0 min CN=91 Runoff=706.44 cfs 44.499 of Subcatchment8S: F2 Runoff Area=31.640 ac 0.00% Impervious Runoff Depth>8.04" Tc=8.0 min CN=91 Runoff=371.35 cfs 21.204 of Subcatchment9S: G1 Runoff Area=48.900 ac 0.00% Impervious Runoff Depth>8.15" Tc=14.0 min CN=92 Runoff=480.97 cfs 33.228 of Subcatchment10S: G2 Runoff Area=49.050 ac 0.00% Impervious Runoff Depth>8.15" Tc=14.0 min CN=92 Runoff=482.44 cfs 33.330 of Pond 4P: Pond 1 Peak Elev=460.56' Storage=1,924,867 cf Inflow=4,687.17 cfs 281.839 of Outflow=3,891.23 cfs 281.414 of Total Runoff Area = 450.690 ac Runoff Volume = 281.839 of Average Runoff Depth = 7.50" 100.00% Pervious = 450.690 ac 0.00% Impervious = 0.000 ac Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 57 Summary for Subcatchment 1S: C1 [49] Hint: Tc<2dt may require smaller dt Runoff = 313.57 cfs @ 11.95 hrs, Volume= 15.278 af, Depth> 6.70" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 27.380 80 27.380 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: C1 Hydrograph 340 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 320 11 1 1 1 1 313 57 afs - 1 1 1 1 1 �f 1 1 1 1 1 1 Typell ` -hr 300 280 --- - 11- rt 11 fi-1 r- rt 11 r I w191 1 1 7 011 ailln u 1 1-- 260 - I- t 1 t- -1 -t I T 1 A - Runoff �4rea1=27 380 ac- 240 200 -I- T,��I �j TI nQ�n�lY,�Q1umcr- �_1_�_1_�-I_I-�_1_�_1 #��7 L - I- -1 - L J - L 1 -I- �-at - 1R�.IIIV111 DiBp h:66.1 0" `-' 180 1 1 i- 1 1 a -1 - - - -1 1 1 1 - - - 1 - - - 1_ 1 - - - 1 1 - - - - - - - - - - - - - - 1 1 1 1 1 T_c_r-5_ J 160 U.140 _ _ _ _ _1 _ _ _ _ _ _ _ _1 _ _0 _min_ w' L 100 1 1 TF T 1 T--1L T I T 1 - -1- T I F 1 T 1 T 1 80 �- I- TI -1 T -1-I-T-I-t--I-I-rt-IfiI 60 -1 + 1 S I T --- T -I ---, I--f -1- 40 _ 1- -1 - -1 - 1- - 1- 4 - 1 1 1 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 58 Hydrograph for Subcatchment 1S: Cl Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.00 3.50 0.38 0.00 0.00 3.75 0.41 0.00 0.00 4.00 0.44 0.00 0.00 4.25 0.47 0.00 0.00 4.50 0.50 0.00 0.00 4.75 0.54 0.00 0.09 5.00 0.58 0.00 0.20 5.25 0.61 0.00 0.32 5.50 0.65 0.01 0.44 5.75 0.69 0.01 0.56 6.00 0.73 0.02 0.69 6.25 0.77 0.03 0.83 6.50 0.82 0.04 0.97 6.75 0.86 0.05 1.11 7.00 0.90 0.06 1.26 7.25 0.95 0.07 1.41 7.50 1.00 0.08 1.57 7.75 1.05 0.10 1.72 8.00 1.10 0.12 1.88 8.25 1.15 0.13 2.18 8.50 1.21 0.16 2.55 8.75 1.27 0.18 2.97 9.00 1.34 0.21 3.42 9.25 1.42 0.25 3.69 9.50 1.49 0.28 3.88 9.75 1.57 0.32 4.40 10.00 1.65 0.36 5.13 10.25 1.75 0.42 6.11 10.50 1.86 0.48 7.26 10.75 1.99 0.56 8.92 11.00 2.15 0.65 10.92 11.25 2.34 0.78 14.71 11.50 2.59 0.95 19.67 11.75 3.54 1.67 101.92 12.00 6.06 3.84 266.10 12.25 6.45 4.19 37.20 12.50 6.72 4.43 24.19 12.75 6.90 4.60 18.12 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 4.75 15.14 13.25 7.19 4.87 13.11 13.50 7.30 4.97 11.50 13.75 7.40 5.07 10.21 14.00 7.49 5.15 9.05 14.25 7.58 5.23 8.41 14.50 7.66 5.30 8.01 14.75 7.73 5.37 7.61 15.00 7.80 5.44 7.20 15.25 7.87 5.50 6.80 15.50 7.93 5.56 6.39 15.75 7.99 5.61 5.98 16.00 8.04 5.67 5.57 16.25 8.10 5.71 5.34 16.50 8.15 5.76 5.20 16.75 8.19 5.81 5.06 17.00 8.24 5.85 4.91 17.25 8.29 5.90 4.76 17.50 8.33 5.94 4.62 17.75 8.38 5.98 4.47 18.00 8.42 6.02 4.33 18.25 8.46 6.06 4.18 18.50 8.50 6.09 4.03 18.75 8.53 6.13 3.89 19.00 8.57 6.16 3.74 19.25 8.61 6.20 3.59 19.50 8.64 6.23 3.44 19.75 8.67 6.26 3.30 20.00 8.70 6.29 3.15 20.25 8.73 6.31 3.08 20.50 8.76 6.34 3.05 20.75 8.79 6.37 3.02 21.00 8.82 6.40 2.99 21.25 8.85 6.42 2.97 21.50 8.87 6.45 2.94 21.75 8.90 6.48 2.91 22.00 8.93 6.50 2.88 22.25 8.96 6.53 2.85 22.50 8.98 6.55 2.82 22.75 9.01 6.58 2.79 23.00 9.04 6.60 2.76 23.25 9.06 6.63 2.73 23.50 9.09 6.65 2.70 23.75 9.11 6.68 2.67 24.00 9.14 6.70 2.64 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 59 Summary for Subcatchment 2S: C2 [49] Hint: Tc<2dt may require smaller dt Runoff = 1,008.86 cfs @ 11.95 hrs, Volume= 49.666 af, Depth> 6.94" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 85.840 82 85.840 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 2S: C2 Hydrograph � I L I L 1 I L i I L — L I 1 1 L-1 1 1 1 L 1,100 -4 1 -k 1 1 1 � 1 1 -4 1 r 1 1 1 I L 1 T 1 ■Runoff 1,050 t 1 t 1,008.86cfs 1 L t 1,000 r 1 r 1 r 7 1 r 1 1 7 r 1 I 7 1 tType-IU24-hr 950 1 F 7 A900 (�(� � 00 - A L. 800 1 1 I 1 1 1 1 I I 1 I 1 wind Area=85.840-ac 700 4 I 1 1 1 I 1 4 70 �I�I-I1I- LII� unQ oll� l ei=4��6�� 650 '1- II- '1- 'Rd ft6 f ]D-bP 6&-1%4'" c 550 - -I - -I- -I - -I -I - I- -I - Tcr*JAO min LL500 450 - - _ - - - _ 1 _I - - - - - _ I_ 1 _ _ - - - - 1 _I _ I_ - -I - - - - - - - - - - - - - - - 1 _I _ I_ _ _ _1 _ 1_ N 400 - I - -1 - - - I - -1 - 1- -1 - I- 7 - I - 4--- I- I - 2. 350 -1 - 1 -1 - 1— 7 -I - +- - I- + -1 - � 300 -I- t -I- - fi -I- t -1 - I - t -I- fi -1- 250 7-1-T-1-r7-1-7--1 1 1-T-1-I-T-1-7 200 --- 150 ------------ -------- 100 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 60 Hydrograph for Subcatchment 2S: C2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.00 3.50 0.38 0.00 0.00 3.75 0.41 0.00 0.00 4.00 0.44 0.00 0.00 4.25 0.47 0.00 0.23 4.50 0.50 0.00 0.57 4.75 0.54 0.00 0.94 5.00 0.58 0.01 1.32 5.25 0.61 0.01 1.72 5.50 0.65 0.02 2.14 5.75 0.69 0.03 2.57 6.00 0.73 0.03 3.01 6.25 0.77 0.04 3.47 6.50 0.82 0.06 3.93 6.75 0.86 0.07 4.41 7.00 0.90 0.08 4.90 7.25 0.95 0.10 5.40 7.50 1.00 0.11 5.91 7.75 1.05 0.13 6.42 8.00 1.10 0.15 6.94 8.25 1.15 0.17 7.94 8.50 1.21 0.20 9.23 8.75 1.27 0.23 10.63 9.00 1.34 0.26 12.13 9.25 1.42 0.30 13.02 9.50 1.49 0.34 13.57 9.75 1.57 0.38 15.33 10.00 1.65 0.43 17.75 10.25 1.75 0.49 21.01 10.50 1.86 0.56 24.80 10.75 1.99 0.65 30.28 11.00 2.15 0.75 36.84 11.25 2.34 0.88 49.31 11.50 2.59 1.06 65.46 11.75 3.54 1.81 334.40 12.00 6.06 4.04 853.49 12.25 6.45 4.41 118.72 12.50 6.72 4.65 77.11 12.75 6.90 4.82 57.71 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 4.97 48.21 13.25 7.19 5.09 41.73 13.50 7.30 5.20 36.59 13.75 7.40 5.30 32.46 14.00 7.49 5.38 28.77 14.25 7.58 5.46 26.74 14.50 7.66 5.53 25.46 14.75 7.73 5.60 24.17 15.00 7.80 5.67 22.88 15.25 7.87 5.73 21.59 15.50 7.93 5.79 20.29 15.75 7.99 5.85 18.99 16.00 8.04 5.90 17.69 16.25 8.10 5.95 16.97 16.50 8.15 6.00 16.50 16.75 8.19 6.04 16.04 17.00 8.24 6.09 15.58 17.25 8.29 6.13 15.12 17.50 8.33 6.18 14.65 17.75 8.38 6.22 14.19 18.00 8.42 6.26 13.72 18.25 8.46 6.30 13.26 18.50 8.50 6.33 12.79 18.75 8.53 6.37 12.32 19.00 8.57 6.40 11.85 19.25 8.61 6.44 11.39 19.50 8.64 6.47 10.92 19.75 8.67 6.50 10.45 20.00 8.70 6.53 9.98 20.25 8.73 6.56 9.77 20.50 8.76 6.58 9.68 20.75 8.79 6.61 9.58 21.00 8.82 6.64 9.49 21.25 8.85 6.67 9.40 21.50 8.87 6.69 9.31 21.75 8.90 6.72 9.21 22.00 8.93 6.75 9.12 22.25 8.96 6.77 9.03 22.50 8.98 6.80 8.94 22.75 9.01 6.82 8.84 23.00 9.04 6.85 8.75 23.25 9.06 6.87 8.66 23.50 9.09 6.90 8.56 23.75 9.11 6.92 8.47 24.00 9.14 6.95 8.36 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 61 Summary for Subcatchment 3S: D1 [49] Hint: Tc<2dt may require smaller dt Runoff = 137.26 cfs @ 11.95 hrs, Volume= 6.626 af, Depth> 6.45" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 12.330 78 12.330 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 3S: D1 Hydrograph 1 L A L L I -_ __ L -1- L J L L 1 L 1 150 1 -I- -I- 1 - I -I - 1 -I- _I_ -I- 1 - I - 7 I-T-1-7--F7-1-T-1 Typef124-hr 130 -1-+-1- 1-+ 1a+ 120 _ -------- 00 nIll�914-, _ -L - pi- �L _ 110 Runoff Arda:02 33Q ad- 100 — I— T 1 L- F 7 I T 1 1 1 �/ 1 1 1 1 1 1 1 -Runoff olume�26 Cif 90 80 � - I T I 1 1 1 �- � 1 1 �- 4 1 1 I T - 1 1 -' I- I I I � �r 1Iu1rIQfDPp-h>�. 51 0 70 — I— —I — —I — —I— —I 1 — 1— 1 —1— 1 T��S.Q %� in- LL - - - - - - - - -- - - - - - _I - - - - - - - 60 — I— rt L C rt fi 1 1 1 rt rt t rt-C-Nr-:76- 50 4 1 T —1 - — I— 1 — ! —1 - 1 4- 1 40 30 20 I I I I I I I I I I I I I I I I 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 62 Hydrograph for Subcatchment 3S: D1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.00 3.50 0.38 0.00 0.00 3.75 0.41 0.00 0.00 4.00 0.44 0.00 0.00 4.25 0.47 0.00 0.00 4.50 0.50 0.00 0.00 4.75 0.54 0.00 0.00 5.00 0.58 0.00 0.00 5.25 0.61 0.00 0.05 5.50 0.65 0.00 0.10 5.75 0.69 0.01 0.15 6.00 0.73 0.01 0.21 6.25 0.77 0.01 0.26 6.50 0.82 0.02 0.32 6.75 0.86 0.03 0.38 7.00 0.90 0.04 0.44 7.25 0.95 0.05 0.51 7.50 1.00 0.06 0.57 7.75 1.05 0.07 0.64 8.00 1.10 0.08 0.71 8.25 1.15 0.10 0.83 8.50 1.21 0.12 0.98 8.75 1.27 0.14 1.16 9.00 1.34 0.17 1.34 9.25 1.42 0.20 1.47 9.50 1.49 0.23 1.55 9.75 1.57 0.26 1.77 10.00 1.65 0.30 2.08 10.25 1.75 0.35 2.49 10.50 1.86 0.41 2.98 10.75 1.99 0.48 3.69 11.00 2.15 0.57 4.55 11.25 2.34 0.69 6.17 11.50 2.59 0.84 8.31 11.75 3.54 1.53 43.70 12.00 6.06 3.63 116.86 12.25 6.45 3.98 16.42 12.50 6.72 4.22 10.69 12.75 6.90 4.39 8.02 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 4.53 6.70 13.25 7.19 4.65 5.81 13.50 7.30 4.75 5.10 13.75 7.40 4.84 4.52 14.00 7.49 4.93 4.01 14.25 7.58 5.00 3.73 14.50 7.66 5.07 3.55 14.75 7.73 5.14 3.38 15.00 7.80 5.21 3.20 15.25 7.87 5.27 3.02 15.50 7.93 5.33 2.84 15.75 7.99 5.38 2.66 16.00 8.04 5.43 2.47 16.25 8.10 5.48 2.37 16.50 8.15 5.53 2.31 16.75 8.19 5.57 2.25 17.00 8.24 5.62 2.18 17.25 8.29 5.66 2.12 17.50 8.33 5.70 2.05 17.75 8.38 5.74 1.99 18.00 8.42 5.78 1.92 18.25 8.46 5.82 1.86 18.50 8.50 5.85 1.79 18.75 8.53 5.89 1.73 19.00 8.57 5.92 1.66 19.25 8.61 5.95 1.60 19.50 8.64 5.98 1.53 19.75 8.67 6.01 1.47 20.00 8.70 6.04 1.40 20.25 8.73 6.07 1.37 20.50 8.76 6.10 1.36 20.75 8.79 6.12 1.35 21.00 8.82 6.15 1.33 21.25 8.85 6.18 1.32 21.50 8.87 6.20 1.31 21.75 8.90 6.23 1.29 22.00 8.93 6.26 1.28 22.25 8.96 6.28 1.27 22.50 8.98 6.31 1.26 22.75 9.01 6.33 1.24 23.00 9.04 6.36 1.23 23.25 9.06 6.38 1.22 23.50 9.09 6.41 1.20 23.75 9.11 6.43 1.19 24.00 9.14 6.45 1.17 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 63 Summary for Subcatchment 4S: D2 Runoff = 971.07 cfs @ 11.98 hrs, Volume= 52.043 af, Depth> 7.43" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 84.030 86 84.030 100.00% Pervious Area Tc (min) Length (feet) Slope (ft/ft) Velocity (ft/sec) Capacity (cfs) Description 7.0 Direct Entry, Subcatchment 4S: D2 Hydrograph 1,050 — — I I — _I I I I _ I I I I I I I I I I I I I I I I ■Runoff 1,000 1 — 1— L —1 — L 1 — 1— L —1 — 1 971.07ds _ L J — 1— 1 —1— L J — I— 1 —1 — L 950 �_1_�_1_��_1_�_I_1__1 �_1_1_�_1_-Typ�a-IL24-h-r 850 114�. rt-11-t-11-rrt-11- fi-i-11--11 -11108-t" 411* 800 _ I F 1 1-_ I T_ 1 F - T_ Ru1nd-'�rea�84.030 at 750 700 I I 1 kunolff /ollt�m�--�i3. � af 650 —1------------- 1 1 1 --- — — — F 600 1 —1— 1 —I — I— I —I— I —I — I— I M—�—�—I^—�—Y—�---q—I, - 1 —1 — IRu1 li-6il�p�tl��l�r� 550 -1-1—L-1—L1—I—L-1—L-1 _L-1—I-1—I—LJ-1-1-1—L _0 500 � - I - L -1 - I- 1 - I - L -1 - 1- -1 - 1- -1 - I- 1 -1- L Tcr-_M i q " 450 -4-1--k-1--4-1- -4 - 4 1-4--� L 400——t———fi——III �I 350 300 _T T I F -1 T I IF T_ I F _T T-1 T T_ 250 —- 200 - 150 I— —I— —I — I— —I — 100 --- —I—I- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 64 Hydrograph for Subcatchment 4S: D2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.09 3.50 0.38 0.00 0.46 3.75 0.41 0.00 0.83 4.00 0.44 0.01 1.20 4.25 0.47 0.01 1.59 4.50 0.50 0.02 2.01 4.75 0.54 0.02 2.44 5.00 0.58 0.03 2.88 5.25 0.61 0.04 3.34 5.50 0.65 0.05 3.82 5.75 0.69 0.07 4.30 6.00 0.73 0.08 4.79 6.25 0.77 0.10 5.29 6.50 0.82 0.11 5.80 6.75 0.86 0.13 6.32 7.00 0.90 0.15 6.84 7.25 0.95 0.17 7.36 7.50 1.00 0.20 7.89 7.75 1.05 0.22 8.43 8.00 1.10 0.25 8.96 8.25 1.15 0.28 9.99 8.50 1.21 0.31 11.46 8.75 1.27 0.35 13.02 9.00 1.34 0.39 14.66 9.25 1.42 0.44 15.68 9.50 1.49 0.49 16.16 9.75 1.57 0.54 17.80 10.00 1.65 0.60 20.42 10.25 1.75 0.67 23.80 10.50 1.86 0.75 27.83 10.75 1.99 0.85 33.39 11.00 2.15 0.96 40.27 11.25 2.34 1.11 52.43 11.50 2.59 1.31 69.14 11.75 3.54 2.13 304.44 12.00 6.06 4.47 943.08 12.25 6.45 4.84 133.24 12.50 6.72 5.09 82.82 12.75 6.90 5.27 59.30 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 5.42 49.61 13.25 7.19 5.55 42.54 13.50 7.30 5.66 37.34 13.75 7.40 5.76 33.00 14.00 7.49 5.84 29.28 14.25 7.58 5.92 26.95 14.50 7.66 6.00 25.65 14.75 7.73 6.07 24.35 15.00 7.80 6.14 23.05 15.25 7.87 6.20 21.75 15.50 7.93 6.26 20.45 15.75 7.99 6.32 19.14 16.00 8.04 6.37 17.84 16.25 8.10 6.42 17.01 16.50 8.15 6.47 16.54 16.75 8.19 6.52 16.08 17.00 8.24 6.57 15.62 17.25 8.29 6.61 15.15 17.50 8.33 6.65 14.68 17.75 8.38 6.70 14.22 18.00 8.42 6.74 13.75 18.25 8.46 6.78 13.28 18.50 8.50 6.81 12.82 18.75 8.53 6.85 12.35 19.00 8.57 6.89 11.88 19.25 8.61 6.92 11.41 19.50 8.64 6.95 10.94 19.75 8.67 6.98 10.47 20.00 8.70 7.01 10.00 20.25 8.73 7.04 9.75 20.50 8.76 7.07 9.66 20.75 8.79 7.10 9.56 21.00 8.82 7.13 9.47 21.25 8.85 7.15 9.38 21.50 8.87 7.18 9.28 21.75 8.90 7.21 9.19 22.00 8.93 7.24 9.10 22.25 8.96 7.26 9.00 22.50 8.98 7.29 8.91 22.75 9.01 7.31 8.82 23.00 9.04 7.34 8.73 23.25 9.06 7.37 8.63 23.50 9.09 7.39 8.54 23.75 9.11 7.42 8.45 24.00 9.14 7.44 8.34 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 65 Summary for Subcatchment 5S: E1 Runoff = 309.78 cfs @ 11.97 hrs, Volume= 15.795 af, Depth> 6.82" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 27.800 81 27.800 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Subcatchment 5S: E1 Hydrograph —+ I L 1 L- 1 1 1- �� I L I 340 1 _ 1_ 1 _I _ L _I _ 1_ 1 _I_ L _I L -1 _ 1_ 1 _1 L -1 1 _ 1_ L _1 _ 320 300 _ i_ 1 _1 _ 1 _1 _ 1_ 309.78 cfs I _ 1 1_ 1 _ 1 _ 1 _1 Type II 24!•-hr 280 Fai'1�1fN11g199 260 240 -1- T -1- r - RillndfifAr+ea .800 ac 220 + LL rt rt �u Jc jt� n 4�Q I— + 200 _1 —I — I— — 1 -4 I-RtmbfD6pth�6482'- 180 0 160 _ —— I_ _I —_— _ _I _ I_ — —1 _ 1— 1 — I — L —I _ _ _ I_ _ _ _I _ZcF6JO mim LL 140 817 120,r 100 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — 80 60 I I I I I I I I I I I I I I I I I I -I — 40 90 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 66 Hydrograph for Subcatchment 5S: E1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.00 3.50 0.38 0.00 0.00 3.75 0.41 0.00 0.00 4.00 0.44 0.00 0.00 4.25 0.47 0.00 0.00 4.50 0.50 0.00 0.07 4.75 0.54 0.00 0.19 5.00 0.58 0.00 0.30 5.25 0.61 0.01 0.43 5.50 0.65 0.01 0.56 5.75 0.69 0.02 0.69 6.00 0.73 0.03 0.83 6.25 0.77 0.03 0.97 6.50 0.82 0.04 1.12 6.75 0.86 0.06 1.27 7.00 0.90 0.07 1.42 7.25 0.95 0.08 1.58 7.50 1.00 0.10 1.74 7.75 1.05 0.11 1.90 8.00 1.10 0.13 2.07 8.25 1.15 0.15 2.36 8.50 1.21 0.18 2.76 8.75 1.27 0.21 3.20 9.00 1.34 0.24 3.67 9.25 1.42 0.27 3.97 9.50 1.49 0.31 4.15 9.75 1.57 0.35 4.67 10.00 1.65 0.40 5.43 10.25 1.75 0.45 6.43 10.50 1.86 0.52 7.62 10.75 1.99 0.60 9.31 11.00 2.15 0.70 11.38 11.25 2.34 0.83 15.16 11.50 2.59 1.00 20.26 11.75 3.54 1.74 98.04 12.00 6.06 3.94 289.69 12.25 6.45 4.30 39.65 12.50 6.72 4.54 25.60 12.75 6.90 4.71 18.74 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 4.86 15.69 13.25 7.19 4.98 13.52 13.50 7.30 5.09 11.87 13.75 7.40 5.18 10.51 14.00 7.49 5.27 9.33 14.25 7.58 5.34 8.63 14.50 7.66 5.42 8.22 14.75 7.73 5.49 7.80 15.00 7.80 5.55 7.39 15.25 7.87 5.62 6.97 15.50 7.93 5.68 6.56 15.75 7.99 5.73 6.14 16.00 8.04 5.78 5.72 16.25 8.10 5.83 5.47 16.50 8.15 5.88 5.32 16.75 8.19 5.93 5.17 17.00 8.24 5.97 5.03 17.25 8.29 6.01 4.88 17.50 8.33 6.06 4.73 17.75 8.38 6.10 4.58 18.00 8.42 6.14 4.43 18.25 8.46 6.18 4.28 18.50 8.50 6.21 4.13 18.75 8.53 6.25 3.98 19.00 8.57 6.28 3.83 19.25 8.61 6.32 3.68 19.50 8.64 6.35 3.53 19.75 8.67 6.38 3.37 20.00 8.70 6.41 3.22 20.25 8.73 6.43 3.15 20.50 8.76 6.46 3.12 20.75 8.79 6.49 3.09 21.00 8.82 6.52 3.06 21.25 8.85 6.54 3.03 21.50 8.87 6.57 3.00 21.75 8.90 6.60 2.97 22.00 8.93 6.62 2.94 22.25 8.96 6.65 2.91 22.50 8.98 6.68 2.88 22.75 9.01 6.70 2.85 23.00 9.04 6.73 2.82 23.25 9.06 6.75 2.79 23.50 9.09 6.78 2.76 23.75 9.11 6.80 2.73 24.00 9.14 6.82 2.70 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 67 Summary for Subcatchment 6S: E2 Runoff = 188.03 cfs @ 11.99 hrs, Volume= 10.169 af, Depth> 7.06" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 17.280 83 17.280 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 6S: E2 Hydrograph 7 -1- T -1- r - - 1- T -1- r -1 - I- 7 - 1- T -1 210 7 - 1- T -1- 7 � - r 7 -1- T -1- r _ - I- T - I - r � -1-7-1- T -1 - 200 - - - 188.03 cfs 1 190 I- I- 1 -I - I I 1 I -I- 1 � I 1- I- I -I 1 1 fiy - 11-2 fir 180 170 — — 1— 1 —1 — 1 —1 — — '— 1 — 1 — ' v —.. —' --1�61 ln11�71 1 160IIpIrrIA�IAIpm 150 1 1 1 L -1L L I 1 1 -j Runoff Areal- 117 2-80 ac. 140 _ 1- 1 _ I _ L -1 - L 1 _ I _ L -1 I- 1 J - I- I1 130 - 1- T -1 - -1 - I- -1- T -I noff l ume-F �IL6 w 120 + I + I --I+ I 4-1 -4 I- +RUnbff< Dlzpth:67.4O6'- c 100-1-rt-1---I-rt-1- fi-I rt--rt-1---rc�JBfn `L 80 7 - I- T -1- r -1 - 1-7 -1- T -1 -T - I- T - I - T--1 7 L�4� -1 J 7 I T 17 7 L 7 I T 1 I T I r 7 7 70 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 60 - - 50 _I _ _I - I_ _I_ I_ _I_ - I_ _ I_ _I _ 40 _ _ _ 30 20 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 68 Hydrograph for Subcatchment 6S: E2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.00 2.50 0.26 0.00 0.00 2.75 0.29 0.00 0.00 3.00 0.32 0.00 0.00 3.25 0.35 0.00 0.00 3.50 0.38 0.00 0.00 3.75 0.41 0.00 0.00 4.00 0.44 0.00 0.03 4.25 0.47 0.00 0.10 4.50 0.50 0.00 0.17 4.75 0.54 0.01 0.25 5.00 0.58 0.01 0.33 5.25 0.61 0.02 0.41 5.50 0.65 0.03 0.50 5.75 0.69 0.03 0.59 6.00 0.73 0.04 0.68 6.25 0.77 0.05 0.77 6.50 0.82 0.07 0.87 6.75 0.86 0.08 0.97 7.00 0.90 0.10 1.07 7.25 0.95 0.11 1.17 7.50 1.00 0.13 1.28 7.75 1.05 0.15 1.38 8.00 1.10 0.17 1.49 8.25 1.15 0.20 1.67 8.50 1.21 0.22 1.94 8.75 1.27 0.26 2.22 9.00 1.34 0.29 2.53 9.25 1.42 0.33 2.75 9.50 1.49 0.37 2.86 9.75 1.57 0.42 3.16 10.00 1.65 0.47 3.65 10.25 1.75 0.53 4.28 10.50 1.86 0.60 5.05 10.75 1.99 0.69 6.09 11.00 2.15 0.80 7.42 11.25 2.34 0.94 9.68 11.50 2.59 1.12 12.92 11.75 3.54 1.89 54.25 12.00 6.06 4.15 186.77 12.25 6.45 4.51 29.32 12.50 6.72 4.76 17.21 12.75 6.90 4.94 12.11 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 5.08 10.13 13.25 7.19 5.20 8.66 13.50 7.30 5.31 7.61 13.75 7.40 5.41 6.72 14.00 7.49 5.50 5.97 14.25 7.58 5.57 5.47 14.50 7.66 5.65 5.21 14.75 7.73 5.72 4.94 15.00 7.80 5.79 4.68 15.25 7.87 5.85 4.42 15.50 7.93 5.91 4.16 15.75 7.99 5.97 3.89 16.00 8.04 6.02 3.63 16.25 8.10 6.07 3.45 16.50 8.15 6.12 3.36 16.75 8.19 6.16 3.26 17.00 8.24 6.21 3.17 17.25 8.29 6.25 3.08 17.50 8.33 6.30 2.98 17.75 8.38 6.34 2.89 18.00 8.42 6.38 2.79 18.25 8.46 6.42 2.70 18.50 8.50 6.45 2.61 18.75 8.53 6.49 2.51 19.00 8.57 6.52 2.42 19.25 8.61 6.56 2.32 19.50 8.64 6.59 2.23 19.75 8.67 6.62 2.13 20.00 8.70 6.65 2.04 20.25 8.73 6.68 1.98 20.50 8.76 6.71 1.96 20.75 8.79 6.73 1.94 21.00 8.82 6.76 1.92 21.25 8.85 6.79 1.90 21.50 8.87 6.82 1.89 21.75 8.90 6.84 1.87 22.00 8.93 6.87 1.85 22.25 8.96 6.90 1.83 22.50 8.98 6.92 1.81 22.75 9.01 6.95 1.79 23.00 9.04 6.97 1.77 23.25 9.06 7.00 1.75 23.50 9.09 7.02 1.74 23.75 9.11 7.05 1.72 24.00 9.14 7.07 1.70 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 69 Summary for Subcatchment 7S: F1 Runoff = 706.44 cfs @ 12.02 hrs, Volume= 44.499 af, Depth> 8.04" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 66.440 91 66.440 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 11.0 Direct Entry, Subcatchment 7S: F1 Hydrograph 7 —1— T —1— 7 —1 — 1— 7 —1— T —1— 7 - —I— T —I— T —I — I— 7 —1— T —1- 750 -1 11— + —I �os.aa rs — I— 700 A— ype II 24-h ri L 1—I—L -1 —1-1 1 L-1 1 1— L 1 ��ta�n O'1 g.'I 1 i 600 V�Y650 Runoff Arch 66.44OIac —I — — — — - 550 Ilno 500 k u f _Wo nn-e�44� � of w 450 Rui'"Af DeOth>8-.0 n 1_ 1 _1 I _ I_ 1 _I _ 1 _I _ I_ 1 _ I_ 1 _1 3 400 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 TC��I �•011171�111 LL 350 300 �N9�1—I- --+-1-4-—--4—I—+—I -—+-1— —1-1—-- 250 1 1 1 1 1 1 1 1 1 1 1 1 1 200 I_ I_ I_ I_ I _I _ I_ I_ I I_ I_ I_ I I I_ I_ I_ 1 1 150 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 -7 1 T —1 1 1 1 1 1 1 100 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 70 Hydrograph for Subcatchment 7S: F1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.19 2.50 0.26 0.00 0.57 2.75 0.29 0.01 0.96 3.00 0.32 0.01 1.35 3.25 0.35 0.02 1.72 3.50 0.38 0.03 2.09 3.75 0.41 0.04 2.44 4.00 0.44 0.05 2.79 4.25 0.47 0.06 3.16 4.50 0.50 0.07 3.56 4.75 0.54 0.09 3.97 5.00 0.58 0.10 4.38 5.25 0.61 0.12 4.80 5.50 0.65 0.14 5.23 5.75 0.69 0.16 5.65 6.00 0.73 0.19 6.08 6.25 0.77 0.21 6.51 6.50 0.82 0.24 6.94 6.75 0.86 0.27 7.36 7.00 0.90 0.29 7.79 7.25 0.95 0.33 8.22 7.50 1.00 0.36 8.64 7.75 1.05 0.39 9.07 8.00 1.10 0.43 9.49 8.25 1.15 0.47 10.23 8.50 1.21 0.51 11.55 8.75 1.27 0.56 12.94 9.00 1.34 0.61 14.39 9.25 1.42 0.67 15.43 9.50 1.49 0.73 15.74 9.75 1.57 0.80 16.71 10.00 1.65 0.87 18.91 10.25 1.75 0.95 21.62 10.50 1.86 1.05 25.03 10.75 1.99 1.16 29.34 11.00 2.15 1.29 35.07 11.25 2.34 1.47 43.81 11.50 2.59 1.69 57.47 11.75 3.54 2.58 189.14 12.00 6.06 5.02 697.17 12.25 6.45 5.40 169.81 12.50 6.72 5.66 77.03 12.75 6.90 5.84 50.96 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 5.99 42.08 13.25 7.19 6.12 35.57 13.50 7.30 6.24 31.21 13.75 7.40 6.34 27.44 14.00 7.49 6.43 24.38 14.25 7.58 6.51 22.08 14.50 7.66 6.58 20.95 14.75 7.73 6.66 19.90 15.00 7.80 6.73 18.84 15.25 7.87 6.79 17.79 15.50 7.93 6.86 16.73 15.75 7.99 6.91 15.68 16.00 8.04 6.97 14.63 16.25 8.10 7.02 13.82 16.50 8.15 7.07 13.41 16.75 8.19 7.12 13.03 17.00 8.24 7.16 12.66 17.25 8.29 7.21 12.28 17.50 8.33 7.25 11.90 17.75 8.38 7.30 11.53 18.00 8.42 7.34 11.15 18.25 8.46 7.38 10.77 18.50 8.50 7.42 10.40 18.75 8.53 7.45 10.02 19.00 8.57 7.49 9.64 19.25 8.61 7.52 9.26 19.50 8.64 7.56 8.89 19.75 8.67 7.59 8.51 20.00 8.70 7.62 8.13 20.25 8.73 7.65 7.86 20.50 8.76 7.68 7.77 20.75 8.79 7.70 7.70 21.00 8.82 7.73 7.62 21.25 8.85 7.76 7.55 21.50 8.87 7.79 7.47 21.75 8.90 7.82 7.40 22.00 8.93 7.84 7.32 22.25 8.96 7.87 7.25 22.50 8.98 7.90 7.17 22.75 9.01 7.92 7.10 23.00 9.04 7.95 7.02 23.25 9.06 7.98 6.95 23.50 9.09 8.00 6.87 23.75 9.11 8.03 6.80 24.00 9.14 8.05 6.72 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 71 Summary for Subcatchment 8S: F2 Runoff = 371.35 cfs @ 11.99 hrs, Volume= 21.204 af, Depth> 8.04" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 31.640 91 31.640 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 8S: F2 Hydrograph 400 380 360 — — - — I - I - I - I - I - I - I 371.35 ors - I - 1 -1 I��I 1 -I- I _I_ I-I1TT ypell-24llr 1 01 320 -J I T 1 L� I I- T 1 7 - I- i - I-- 300 -4 I + 1 � 4 I + 1 rir -4 Rl�l'Yt�n Area=11—.640 ac- 280 -4 - I- + -1 - -1 - 1- 4 - I - + -1 I- + - - 4- -1 1- ��jj��+A -1 - �pQff1Qlum� tic4-af- 260 t I + 1 +-- --I t I- T -1 240 t - I- + -1- -1 - I- t - I - t -1 -1 -1- tRtanbff D6p�th".t04l'- 220 -1 - I- t -1 - r- -1 - I- rt - I - rt -1 -1 - I- rt - r -I 1- rt - I- 1- -1 - 30 200 T -I- T - I - T -1 - T - I - T 1 -1-1- T - I - F -i IIc-;--BJem m LL 180 160 -7 -I- - - T - I - - T -I - F 7 - I - T -I � -I- T - I - T I I 7 -� �- � 911- 140 I I I T"1 120 100-I- 80 60 40 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 72 Hydrograph for Subcatchment 8S: F2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.00 2.25 0.23 0.00 0.12 2.50 0.26 0.00 0.31 2.75 0.29 0.01 0.49 3.00 0.32 0.01 0.67 3.25 0.35 0.02 0.85 3.50 0.38 0.03 1.03 3.75 0.41 0.04 1.19 4.00 0.44 0.05 1.36 4.25 0.47 0.06 1.54 4.50 0.50 0.07 1.73 4.75 0.54 0.09 1.93 5.00 0.58 0.10 2.12 5.25 0.61 0.12 2.32 5.50 0.65 0.14 2.53 5.75 0.69 0.16 2.73 6.00 0.73 0.19 2.93 6.25 0.77 0.21 3.14 6.50 0.82 0.24 3.34 6.75 0.86 0.27 3.54 7.00 0.90 0.29 3.75 7.25 0.95 0.33 3.95 7.50 1.00 0.36 4.15 7.75 1.05 0.39 4.36 8.00 1.10 0.43 4.56 8.25 1.15 0.47 4.98 8.50 1.21 0.51 5.62 8.75 1.27 0.56 6.29 9.00 1.34 0.61 6.98 9.25 1.42 0.67 7.39 9.50 1.49 0.73 7.52 9.75 1.57 0.80 8.13 10.00 1.65 0.87 9.21 10.25 1.75 0.95 10.58 10.50 1.86 1.05 12.23 10.75 1.99 1.16 14.45 11.00 2.15 1.29 17.22 11.25 2.34 1.47 21.95 11.50 2.59 1.69 28.62 11.75 3.54 2.58 115.09 12.00 6.06 5.02 368.07 12.25 6.45 5.40 56.52 12.50 6.72 5.66 32.99 12.75 6.90 5.84 23.16 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 5.99 19.34 13.25 7.19 6.12 16.51 13.50 7.30 6.24 14.49 13.75 7.40 6.34 12.78 14.00 7.49 6.43 11.35 14.25 7.58 6.51 10.39 14.50 7.66 6.58 9.88 14.75 7.73 6.66 9.38 15.00 7.80 6.73 8.88 15.25 7.87 6.79 8.38 15.50 7.93 6.86 7.88 15.75 7.99 6.91 7.37 16.00 8.04 6.97 6.87 16.25 8.10 7.02 6.53 16.50 8.15 7.07 6.35 16.75 8.19 7.12 6.17 17.00 8.24 7.16 5.99 17.25 8.29 7.21 5.82 17.50 8.33 7.25 5.64 17.75 8.38 7.30 5.46 18.00 8.42 7.34 5.28 18.25 8.46 7.38 5.10 18.50 8.50 7.42 4.92 18.75 8.53 7.45 4.74 19.00 8.57 7.49 4.56 19.25 8.61 7.52 4.38 19.50 8.64 7.56 4.20 19.75 8.67 7.59 4.02 20.00 8.70 7.62 3.84 20.25 8.73 7.65 3.73 20.50 8.76 7.68 3.70 20.75 8.79 7.70 3.66 21.00 8.82 7.73 3.62 21.25 8.85 7.76 3.59 21.50 8.87 7.79 3.55 21.75 8.90 7.82 3.52 22.00 8.93 7.84 3.48 22.25 8.96 7.87 3.44 22.50 8.98 7.90 3.41 22.75 9.01 7.92 3.37 23.00 9.04 7.95 3.34 23.25 9.06 7.98 3.30 23.50 9.09 8.00 3.27 23.75 9.11 8.03 3.23 24.00 9.14 8.05 3.19 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 73 Summary for Subcatchment 9S: G1 Runoff = 480.97 cfs @ 12.05 hrs, Volume= 33.228 af, Depth> 8.15" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 48.900 92 48.900 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.0 Direct Entry, Subcatchment 9S: G1 Hydrograph ❑ Runoff 500 480.97 cfs 450 Type 1124a-�1���1�-��Q�-I-t --t-- --I-�- 1` 0 Y�� `."T'..I IL7- .1-4n T 1 I- T r -1 - II- - - I- T -II - 40o Rumoff-4rea�48s9-001ac- _1 1 1 - 1 - I- I -I- 1 -I I I -I- 350 ku 1nof f 1 oiurler3 2$ of 1 1 1 -u- - - . - 1 - - - - - - - - - - - 300 Runoff Oebtl l>8.1 �7 I 1 -1 1- " 1 1 1 1 1 1 _I_ -1- 1 -I- L -1 1_ -1 -1- L -I- 0 250Tc�14.01min I I I I I I I I I I I I LL- ` -I-+-I- t- -I-+--1-1-- 200 TN79-1- - 1 1 1 1 1 1 1 1 1 1 -7-I-T-1-7 -1-7-1-7-1- 150 1 1 1 1 1 1 1 1 100 ro 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 74 Hydrograph for Subcatchment 9S: G1 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.08 2.25 0.23 0.00 0.37 2.50 0.26 0.01 0.68 2.75 0.29 0.01 0.98 3.00 0.32 0.02 1.27 3.25 0.35 0.03 1.56 3.50 0.38 0.04 1.84 3.75 0.41 0.05 2.11 4.00 0.44 0.06 2.38 4.25 0.47 0.08 2.65 4.50 0.50 0.09 2.95 4.75 0.54 0.11 3.26 5.00 0.58 0.13 3.57 5.25 0.61 0.15 3.88 5.50 0.65 0.17 4.20 5.75 0.69 0.19 4.51 6.00 0.73 0.22 4.83 6.25 0.77 0.24 5.14 6.50 0.82 0.27 5.46 6.75 0.86 0.30 5.77 7.00 0.90 0.33 6.08 7.25 0.95 0.37 6.40 7.50 1.00 0.40 6.70 7.75 1.05 0.44 7.01 8.00 1.10 0.48 7.32 8.25 1.15 0.52 7.79 8.50 1.21 0.56 8.74 8.75 1.27 0.61 9.78 9.00 1.34 0.67 10.85 9.25 1.42 0.73 11.72 9.50 1.49 0.79 11.99 9.75 1.57 0.86 12.53 10.00 1.65 0.93 14.07 10.25 1.75 1.02 15.99 10.50 1.86 1.12 18.47 10.75 1.99 1.23 21.48 11.00 2.15 1.37 25.62 11.25 2.34 1.55 31.43 11.50 2.59 1.77 41.18 11.75 3.54 2.67 110.82 12.00 6.06 5.13 438.25 12.25 6.45 5.52 179.31 12.50 6.72 5.78 67.29 12.75 6.90 5.96 40.09 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 6.11 32.27 13.25 7.19 6.24 27.02 13.50 7.30 6.35 23.64 13.75 7.40 6.45 20.73 14.00 7.49 6.54 18.42 14.25 7.58 6.63 16.54 14.50 7.66 6.70 15.62 14.75 7.73 6.78 14.83 15.00 7.80 6.85 14.05 15.25 7.87 6.91 13.27 15.50 7.93 6.97 12.50 15.75 7.99 7.03 11.72 16.00 8.04 7.09 10.94 16.25 8.10 7.14 10.28 16.50 8.15 7.19 9.95 16.75 8.19 7.24 9.67 17.00 8.24 7.28 9.39 17.25 8.29 7.33 9.11 17.50 8.33 7.37 8.83 17.75 8.38 7.42 8.56 18.00 8.42 7.46 8.28 18.25 8.46 7.50 8.00 18.50 8.50 7.54 7.72 18.75 8.53 7.57 7.44 19.00 8.57 7.61 7.16 19.25 8.61 7.64 6.89 19.50 8.64 7.68 6.61 19.75 8.67 7.71 6.33 20.00 8.70 7.74 6.05 20.25 8.73 7.77 5.83 20.50 8.76 7.80 5.75 20.75 8.79 7.83 5.69 21.00 8.82 7.85 5.64 21.25 8.85 7.88 5.58 21.50 8.87 7.91 5.52 21.75 8.90 7.94 5.47 22.00 8.93 7.96 5.41 22.25 8.96 7.99 5.36 22.50 8.98 8.02 5.30 22.75 9.01 8.05 5.25 23.00 9.04 8.07 5.19 23.25 9.06 8.10 5.13 23.50 9.09 8.12 5.08 23.75 9.11 8.15 5.02 24.00 9.14 8.17 4.97 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 75 Summary for Subcatchment 10S: G2 Runoff = 482.44 cfs @ 12.05 hrs, Volume= 33.330 af, Depth> 8.15" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100 YR Rainfall=9.14" Area (ac) CN Description 49.050 92 49.050 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.0 Direct Entry, Subcatchment 10S: G2 Hydrograph -I- 1 -1- L -1 - I- 1 -I- 1 -1- L - -1- 1 -I- L -1 - I- -i -I- 1 ' 500 1 1 1 1 1 1 1 1 1 1 asz.aa ors 1 1 1 1 1 1 1 1 1 1 Type 4I -24-1 �- + 1 + = - 1- + - I - -1 - 1- + - I- + -1 - 450 11001 Y to all? 9r 1 1 1 1 11 I 1 1— rt - 1- T -1 - 1 -1 - 1- rt aoo Runoff Area�49.0501ac I_ I _ I _ I _I _ II _ I _ I _ 350 1 1 3Q h�u 1no f Wo� rner33.3,of 1 1 1 1 1 --------u------- ----------------- 300 Runoff Oebtll>8.1 5" 1 1 1 1 1 1 1 J I 1 1 -1-I-1 - I - -1-1-I-L-1-1--1-I-L-1- 0 250Tc=;14.01min 1 1 1 1 I I I I I I I I " --1-1-4-I- -4-1--I--1-1--4- 200R79 -1+ 1 1 1 1 1 -7-I-T-1-7 1 1-1-7-1-7-1- 150 100 ro 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ❑ Runoff Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 76 Hydrograph for Subcatchment 10S: G2 Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 0.25 0.02 0.00 0.00 0.50 0.05 0.00 0.00 0.75 0.07 0.00 0.00 1.00 0.10 0.00 0.00 1.25 0.12 0.00 0.00 1.50 0.15 0.00 0.00 1.75 0.17 0.00 0.00 2.00 0.20 0.00 0.08 2.25 0.23 0.00 0.37 2.50 0.26 0.01 0.68 2.75 0.29 0.01 0.98 3.00 0.32 0.02 1.28 3.25 0.35 0.03 1.57 3.50 0.38 0.04 1.85 3.75 0.41 0.05 2.12 4.00 0.44 0.06 2.38 4.25 0.47 0.08 2.66 4.50 0.50 0.09 2.96 4.75 0.54 0.11 3.27 5.00 0.58 0.13 3.58 5.25 0.61 0.15 3.89 5.50 0.65 0.17 4.21 5.75 0.69 0.19 4.52 6.00 0.73 0.22 4.84 6.25 0.77 0.24 5.16 6.50 0.82 0.27 5.47 6.75 0.86 0.30 5.79 7.00 0.90 0.33 6.10 7.25 0.95 0.37 6.41 7.50 1.00 0.40 6.73 7.75 1.05 0.44 7.03 8.00 1.10 0.48 7.34 8.25 1.15 0.52 7.82 8.50 1.21 0.56 8.76 8.75 1.27 0.61 9.81 9.00 1.34 0.67 10.88 9.25 1.42 0.73 11.76 9.50 1.49 0.79 12.03 9.75 1.57 0.86 12.57 10.00 1.65 0.93 14.11 10.25 1.75 1.02 16.04 10.50 1.86 1.12 18.53 10.75 1.99 1.23 21.55 11.00 2.15 1.37 25.70 11.25 2.34 1.55 31.52 11.50 2.59 1.77 41.31 11.75 3.54 2.67 111.16 12.00 6.06 5.13 439.60 12.25 6.45 5.52 179.86 12.50 6.72 5.78 67.50 12.75 6.90 5.96 40.21 Time Precip. Excess Runoff hours) (inches) (inches) (cfs) 13.00 7.06 6.11 32.36 13.25 7.19 6.24 27.11 13.50 7.30 6.35 23.71 13.75 7.40 6.45 20.80 14.00 7.49 6.54 18.48 14.25 7.58 6.63 16.59 14.50 7.66 6.70 15.67 14.75 7.73 6.78 14.88 15.00 7.80 6.85 14.10 15.25 7.87 6.91 13.32 15.50 7.93 6.97 12.53 15.75 7.99 7.03 11.75 16.00 8.04 7.09 10.97 16.25 8.10 7.14 10.31 16.50 8.15 7.19 9.98 16.75 8.19 7.24 9.70 17.00 8.24 7.28 9.42 17.25 8.29 7.33 9.14 17.50 8.33 7.37 8.86 17.75 8.38 7.42 8.58 18.00 8.42 7.46 8.30 18.25 8.46 7.50 8.02 18.50 8.50 7.54 7.75 18.75 8.53 7.57 7.47 19.00 8.57 7.61 7.19 19.25 8.61 7.64 6.91 19.50 8.64 7.68 6.63 19.75 8.67 7.71 6.35 20.00 8.70 7.74 6.07 20.25 8.73 7.77 5.84 20.50 8.76 7.80 5.77 20.75 8.79 7.83 5.71 21.00 8.82 7.85 5.65 21.25 8.85 7.88 5.60 21.50 8.87 7.91 5.54 21.75 8.90 7.94 5.48 22.00 8.93 7.96 5.43 22.25 8.96 7.99 5.37 22.50 8.98 8.02 5.32 22.75 9.01 8.05 5.26 23.00 9.04 8.07 5.21 23.25 9.06 8.10 5.15 23.50 9.09 8.12 5.09 23.75 9.11 8.15 5.04 24.00 9.14 8.17 4.98 Existing Type lI 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 77 Summary for Pond 4P: Pond 1 [44] Hint: Outlet device #2 is below defined storage Inflow Area = 450.690 ac, 0.00% Impervious, Inflow Depth > 7.50" for 100 YR event Inflow = 4,687.17 cfs @ 11.98 hrs, Volume= 281.839 of Outflow = 3,891.23 cfs @ 12.04 hrs, Volume= 281.414 af, Atten= 17%, Lag= 3.7 min Primary = 3,891.23 cfs @ 12.04 hrs, Volume= 281.414 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 460.56' @ 12.04 hrs Surf.Area= 273,975 sf Storage= 1,924,867 cf Plug -Flow detention time=16.4 min calculated for 281.414 of (100% of inflow) Center -of -Mass det. time= 15.4 min ( 793.5 - 778.1 ) Volume Invert Avail.Storage Storage Description #1 452.00' 4,171,244 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic -feet) (cubic -feet) 452.00 161,235 0 0 453.00 184,727 172,981 172,981 454.00 202,532 193,630 366,611 455.00 212,990 207,761 574,372 456.00 222,197 217,594 791,965 457.00 235,826 229,012 1,020,977 458.00 245,304 240,565 1,261,542 459.00 255,870 250,587 1,512,129 460.00 267,777 261,824 1,773,952 461.00 278,902 273,340 2,047,292 462.00 291,119 285,011 2,332,302 463.00 366,599 328,859 2,661,161 464.00 372,291 369,445 3,030,606 465.00 378,035 375,163 3,405,769 466.00 382,323 380,179 3,785,948 467.00 388,269 385,296 4,171,244 Device Routinq Invert Outlet Devices #1 Primary 435.10' 108.0" W x 120.0" H Box Culvert X 2.00 L= 131.5' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 435.10' / 434.52' S= 0.0044 '/' Cc= 0.900 n= 0.013, Flow Area= 90.00 sf #2 Device 1 435.70' 24.0" Vert. Orifice/Grate C= 0.600 #3 Device 1 452.22' 23.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) #4 Device 1 455.90' 66.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s) #5 Primary 461.00' 55.0' long x 20.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 78 Primary OutFlow Max=3,846.89 cfs @ 12.04 hrs HW=460.51' (Free Discharge) 1=Culvert (Passes 3,846.89 cfs of 3,905.70 cfs potential flow) P4=S =Orifice/Grate (Orifice Controls 73.81 cfs @ 23.50 fps) =Sharp -Crested Rectangular Weir(Weir Controls 1,666.05 cfs @ 9.42 fps) harp -Crested Rectangular Weir(Weir Controls 2,107.03 cfs @ 7.02 fps) 5=Broad-Crested Rectangular Weir( Controls 0.00 cfs) / 5,000 4,500 / 4,000 / 3,500 / w 3,000 c 2,500 LL / 2,000 1,500 / 1,000 Pond 4P: Pond 1 Hydrograph C L I L 1 I — L I L L 3,891.2 I I I I I I I I I I I I ( I I I ( I I I I I I rt I r rt I ro / 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) ■ Inflow ❑ Primary Existing Type // 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCADO 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 79 Pond 4P: Pond 1 Stage -Discharge 467 466 - - - - - - - - - - - - - - - - - - - - - - 465 464 I I I t- - - - -- 463 - - - - L- 462 - Broad -Crested Rectangular Weir- - d 461 w----r-- -�-----1-----1--- c 460- 'a 459 > - - - - - - - - - - - - - - - - w 458 1 - - - - - - - - - - - - - - - - - - I I I 457 Sharp -Crested Rectangular Weir - - 4 - - - - -I- 456 455 454- -- 453- _ Sharp -Crested Rectangular Weir 452 0 1,000 2,000 3,000 4,000 5,600 6,000 Discharge (cfs) Pond 4P: Pond 1 Stage -Area -Storage Surface/Horizontal/Wetted Area (sq-ft) 0 50,000 100,000 150,000 200.000 250.001 467 It 1-1 1 1 I I I fi 1 fi 1 1 1+ H - 466 465 - L _ _ _ 11 _ _ _1_1_ _ _1- I_ I 464 II 463 II 462 II 1 1 a 461 � 460 - - IT - - 1-1- I - - I - 7 - I - I - -1 - 459 � it I� I I fi fi I 1 >>' I+ I I t I � 458 15 1� I I I I 1- 1 J 1 1 - 457 L _ _ i - . - _ _ I - I_ -1 - L - -1 _ 1 _ -1 _ -1 - J - 456 i l 455 II 454 453 Custom Stage Data 452 0 500,000 1,000,000 1,500,000 2,000,000 2,500,000 3,000,000 3,500,000 4,000,000 Storage (cubic -feet) ❑ Primary e Surface ❑ Storage Existing Type // 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 80 Hydrograph for Pond 4P: Pond 1 Time Inflow Storage Elevation Primary (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 452.00 0.00 0.50 0.00 0 452.00 0.00 1.00 0.00 0 452.00 0.00 1.50 0.00 0 452.00 0.00 2.00 0.16 24 452.00 0.06 2.50 2.24 701 452.00 1.71 3.00 4.57 1,664 452.01 4.05 3.50 7.25 2,712 452.02 6.60 4.00 10.15 3,900 452.02 9.48 4.50 14.02 5,370 452.03 13.06 5.00 18.69 7,240 452.04 17.61 5.50 23.70 9,269 452.06 22.54 6.00 28.89 11,387 452.07 27.69 6.50 34.22 13,567 452.08 32.99 7.00 39.66 15,796 452.10 38.41 7.50 45.18 18,058 452.11 43.92 8.00 50.75 20,344 452.12 49.47 8.50 63.59 24,760 452.15 59.46 9.00 80.86 46,882 452.28 61.09 9.50 89.46 83,596 452.50 71.49 10.00 110.77 119,709 452.71 86.07 10.50 149.80 174,692 453.01 113.47 11.00 214.98 254,863 453.43 161.54 11.50 364.31 394,051 454.13 259.21 12.00 4,599.08 1,865,604 460.34 3,682.88 12.50 482.43 867,964 456.34 735.93 13.00 271.54 555,183 454.91 388.61 13.50 203.07 401,382 454.17 264.78 14.00 159.02 311,896 453.73 199.76 14.50 138.20 254,498 453.43 161.31 15.00 124.27 220,763 453.26 140.20 15.50 110.32 194,145 453.11 124.49 16.00 96.32 168,953 452.98 110.40 16.50 88.93 146,766 452.86 98.94 17.00 83.95 131,395 452.77 91.39 17.50 78.95 118,848 452.70 85.69 18.00 73.95 106,935 452.63 80.48 18.50 68.94 95,115 452.57 75.73 19.00 63.93 82,522 452.49 71.10 19.50 58.90 69,218 452.42 66.77 20.00 53.87 54,117 452.33 62.71 20.50 51.80 38,652 452.24 59.95 21.00 50.81 23,896 452.15 58.11 21.50 49.81 20,610 452.13 50.12 22.00 48.81 20,166 452.12 49.04 22.50 47.81 19,756 452.12 48.04 23.00 46.81 19,345 452.12 47.04 23.50 45.81 18,934 452.12 46.04 24.00 44.77 18,519 452.11 45.04 Existing Type 11 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 81 Elevation Primary (feet) (cfs) 452.00 0.00 452.15 59.46 452.30 61.45 452.45 68.31 452.60 77.88 452.75 89.49 452.90 102.81 453.05 117.63 453.20 133.79 453.35 151.18 453.50 169.70 453.65 189.29 453.80 209.87 453.95 231.39 454.10 253.80 454.25 277.06 454.40 301.13 454.55 325.98 454.70 351.58 454.85 377.89 455.00 404.89 455.15 432.57 455.30 460.89 455.45 489.83 455.60 519.38 455.75 549.52 455.90 580.23 456.05 624.03 456.20 678.73 456.35 740.69 456.50 808.60 456.65 881.67 456.80 959.41 456.95 1,041.41 457.10 1,127.37 457.25 1,217.06 457.40 1,310.25 457.55 1,406.79 457.70 1,506.52 457.85 1,609.29 458.00 1,715.01 458.15 1,823.55 458.30 1,934.82 458.45 2,048.74 458.60 2,165.22 458.75 2,284.19 458.90 2,405.58 459.05 2,529.32 459.20 2,655.36 459.35 2,783.64 459.50 2,914.10 459.65 3,046.70 Stage -Discharge for Pond 4P: Pond 1 Elevation Primary (feet) (cfs) 459.80 3,181.39 459.95 3,318.12 460.10 3,456.85 460.25 3,597.54 460.40 3,740.16 460.55 3,884.66 460.70 3,923.93 460.85 3,938.33 461.00 3,952.68 461.15 3,975.54 461.30 4,005.53 461.45 4,040.24 461.60 4,078.57 461.75 4,118.49 461.90 4,161.42 462.05 4,207.46 462.20 4,256.49 462.35 4,307.27 462.50 4,359.60 462.65 4,413.73 462.80 4,470.23 462.95 4,528.50 463.10 4,588.47 463.25 4,650.08 463.40 4,713.27 463.55 4,777.99 463.70 4,844.20 463.85 4,911.85 464.00 4,980.90 464.15 5,051.32 464.30 5,123.07 464.45 5,196.13 464.60 5,270.46 464.75 5,346.03 464.90 5,422.82 465.05 5,500.81 465.20 5,579.97 465.35 5,660.28 465.50 5,741.73 465.65 5,824.28 465.80 5,907.93 465.95 5,992.65 466.10 6,078.44 466.25 6,165.26 466.40 6,253.12 466.55 6,341.99 466.70 6,431.85 466.85 6,522.71 467.00 6,614.53 Existing Type /I 24-hr 100 YR Rainfall=9.14" Prepared by Timmons Group Printed 3/27/2020 HydroCAD® 10.00-25 s/n 08663 © 2019 HydroCAD Software Solutions LLC Page 82 Stage -Area -Storage for Pond 4P: Pond 1 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 452.00 161,235 0 452.15 164,759 24,450 452.30 168,283 49,428 452.45 171,806 74,934 452.60 175,330 100,970 452.75 178,854 127,533 452.90 182,378 154,626 453.05 185,617 182,240 453.20 188,288 210,282 453.35 190,959 238,726 453.50 193,630 267,570 453.65 196,300 296,815 453.80 198,971 326,460 453.95 201,642 356,506 454.10 203,578 386,916 454.25 205,147 417,570 454.40 206,715 448,460 454.55 208,284 479,585 454.70 209,853 510,945 454.85 211,421 542,541 455.00 212,990 574,372 455.15 214,371 606,424 455.30 215,752 638,683 455.45 217,133 671,149 455.60 218,514 703,823 455.75 219,895 736,703 455.90 221,276 769,791 456.05 222,878 803,092 456.20 224,923 836,677 456.35 226,967 870,569 456.50 229,012 904,767 456.65 231,056 939,272 456.80 233,100 974,084 456.95 235,145 1,009,202 457.10 236,774 1,044,606 457.25 238,196 1,080,229 457.40 239,617 1,116,065 457.55 241,039 1,152,114 457.70 242,461 1,188,377 457.85 243,882 1,224,853 458.00 245,304 1,261,542 458.15 246,889 1,298,456 458.30 248,474 1,335,608 458.45 250,059 1,372,998 458.60 251,644 1,410,626 458.75 253,229 1,448,491 458.90 254,813 1,486,594 459.05 256,465 1,524,937 459.20 258,251 1,563,541 459.35 260,037 1,602,412 459.50 261,824 1,641,552 459.65 263,610 1,680,959 Elevation Surface Storage (feet) (sq-ft) (cubic -feet) 459.80 265,396 1,720,635 459.95 267,182 1,760,578 460.10 268,890 1,800,785 460.25 270,558 1,841,244 460.40 272,227 1,881,953 460.55 273,896 1,922,912 460.70 275,564 1,964,122 460.85 277,233 2,005,581 461.00 278,902 2,047,292 461.15 280,735 2,089,264 461.30 282,567 2,131,512 461.45 284,400 2,174,034 461.60 286,232 2,216,832 461.75 288,065 2,259,904 461.90 289,897 2,303,251 462.05 294,893 2,346,952 462.20 306,215 2,392,035 462.35 317,537 2,438,817 462.50 328,859 2,487,297 462.65 340,181 2,537,474 462.80 351,503 2,589,351 462.95 362,825 2,642,925 463.10 367,168 2,697,849 463.25 368,022 2,752,989 463.40 368,876 2,808,256 463.55 369,730 2,863,651 463.70 370,583 2,919,175 463.85 371,437 2,974,826 464.00 372,291 3,030,606 464.15 373,153 3,086,514 464.30 374,014 3,142,552 464.45 374,876 3,198,719 464.60 375,737 3,255,015 464.75 376,599 3,311,440 464.90 377,461 3,367,994 465.05 378,249 3,424,676 465.20 378,893 3,481,462 465.35 379,536 3,538,344 465.50 380,179 3,595,323 465.65 380,822 3,652,398 465.80 381,465 3,709,569 465.95 382,109 3,766,837 466.10 382,918 3,824,210 466.25 383,810 3,881,715 466.40 384,701 3,939,353 466.55 385,593 3,997,125 466.70 386,485 4,055,031 466.85 387,377 4,113,071 467.00 388,269 4,171,244