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Drainage Report
From: Jim Smith To: Sabine Date: 4/20/98 9:29AM SubJect: PRC -Wednesday, April 22, 1998 Shenandoan Phases 6-10 {98-309): No problem. Wheeler Subdivision Phase II {98-310): No problem. Ashford. Square Subdivision (98-215): No problem. West. Knoll Section If (98-216): No problem. Thanks!! ~ ~I ~~: r- { ~ , ~- ~~ ~_ _~ r-:: ,i ~~ -, F~~ ~_ ~u -- ~._ r-- .Drainage Report FoR S.f~.t~NAND4AH P.I~~4SES S - 10 r~ ( I//C/N/TY MAP JUNE ~ ~' JUL 2 41998 Prepared 8y. Mc(~ure Engineering. Ina GALL ( (~(®~, 1722 8raadmoor Drive, Suite 210 ((~'~ ((~ Bryan, Texas 77802 (409) 776-6700 DRAINAGE REPORT CERTIFICATION I, Joel J. Mitchell, Registered Professional Engineer No. 80649 in the State of Texas, certify that this report for the drainage design of SHENANDOAH SUBDIVISION PHASES 6-10 was prepared by me in accordance with the provisions of the City of College Station Drainage Policy and Design Standards for the owners thereof. tht~ ~~2 ~~4t-.'r- "'~a9Ci ~e ° ~ a' '~ ~~ •eaarasea•®oaaoaaaas JOEL J. Mi~CHELL •a ®~eaaaaaaoaaaaaasaro IOJUNL- 9$ %/ DRAINAGE REPORT SHENANDOAH PHASES 6 THROUGH 10 ~1 i i Ir ,. L_ i i ,t f -' l i i i .l i r mil, F^1 i d _, ii i I ,~-1 ~~. ~~ .- ~., Record of Modifications Date: Pa es Re laced: Re laced B DRAINAGE REPORT SHENANDOAH PHASES 6 THROUGH 10 ~ __ ~, ~, ~ _. ~_- ~:~ ~ -. i ~~ i --, ~, 1 i ', I, ~~ TABLE OF CONTENTS ...DRAINAGE REPORT. SHENANDOAH PHASES 6 THROUGH 10 INTRODUCTION GENERAL LOCATION AND DESCRIPTION FLOOD HAZARD INFORMATION PRIMARY DRAINAGE BASIN DESCRIPTION STORM DRAINAGE DESIGN CRITERIA STORM DRAINAGE FACILITY DESIGN DETENTION FACILITY DESIGN CRITERIA DETENTION FACILITY DESIGN CONCLUSION ' EXHIBITS FEMA FLOOD INSURANCE RATE MAP EXCERPT DRAINAGE AREA MAP -PROPOSED CONDITIONS RATIONAL FORMULAS .DRAINAGE AREA CALCULATIONS INLET COMPUTATIONS PIPE SIZE CALCULATIONS CULVERT ANALYSIS HYDRAULIC GRADE LINE ANALYSIS ROUTING OF DETENTION POND #I TRIANGULAR ROUTING OF POND # I STAGE-STORAGE/DISCHARGE CURVE FOR POND #1 ROUTING OF DETENTION POND #2 TRIANGULAR ROUTING OF POND #2 1 1 1 2 2 2 3 4 6 ..A.. .,B.. "C-I" vt r-+-2 n "C-3" "C-4" 6L~-5ll nD-1" "D-2" "D-3" °'E-I'° "E-2" F^- 14_ r I DRAINAGE REPORT r SHENANDOAH PHASES 6 THROUGII 10 INTRODUCTION: The. purpose of this report is to study the e$ects of the development of phases six through ten -- of Shenandoah. The :parameters used for design and the existing conditions of the on-site azea are i - incorporated to show how the final drainage design will accomplish the desired drainage objectives -_; per the City of College Station Drainage Policy and Design Standards (DPDS.) GENERAL LOCATION AND DESCRIPTION: The 87.77 acre. site is located west of existing Shenandoah. phases 4 and 5, and. south of Barron Road. The property is bounded by Barron Road to the north. To the east is existing Shenandoah Subdivision and property owned by E. Boswell Porter and Robert P. Woad. The south is bounded by property owned by Timothy J. Crowley and the west is bounded by property owned j by Charles and Ann Ferguson. Approximately half of the site is wooded. The site is gently rolling with an average .slope of 2.0% to 2.5%. FLOOD IiA_?ARn INFORMATION: This property is not in a 10(}-Year Flood Hazard Area according to the Flood Insurance Rate Maps prepared by the Federal Emergency Management Agency, for the City of College Station (See Exhibit "A"). DRAINAGE REPORT 1 SHENANDOAH PHASES 6 THROUGH 10 F ~ _ I~ ~'-~ PP:IMARY DRAINAGE BASIN DESCRIPTION: The site naturally drains to the southeast. Most of the site drains into awell-defined channel located at the southeast corner of the development. This natural channel is located within the boundaries of the proposed 12.1 acre city park. This channel is a tributary of Spring Creek. A small portion of Phase Nine drains to the south into a second tributary of Spring Creek. A small portion of Phase Six along Barron Road drains to an existing culvert that conveys water to the north under Barron Road. There is an existing Stock Tank on the site which will be filled in. STORM DRAIN DESIGN CRITERIA: All drainage design is in accordance with the City DPDS. The design rainstorm is the 10-year event. Flow calculations for all drainage areas are based on the Rational Method. The time of coiicentrationfor each drainage area is computed using the guideline provided in TR SS. The .storm intensity is computed using the lDF equations in the DPDS. Curb capacity is computed using manning's .equation with a roughness coefficient of n~.01 S. Storm drain capacity is based. on ~,, nianiiing's equation with a 25% increase in flow for pipes less than or equal to 24" in diameter.. Pipe sizing for the culvert is based on evaluating Inlet and Outlet Control for the 10-year event. Manning's Roughness Coefficient "n" for. all reinforced concrete pipe is 0.0 i 4 per the DPDS. I STORM DRAIN FACII.TTY DESIGN: j Storni water fmm the site will be captured. in the curbs and gutters and conveyed by RC.P. storm drain to the detention facilities., Exhibit C-1 shows the rational calculations for the various t__~ drainage areas corresponding to the Drainage Area Map .(Exhibit B), Exhibit C-2 shows the inlet computations. Exhibit C-3 shows the pig size calculations for the storm drain. Exhibit C-4 shows DRAINAGE REPORT 2 SHENANDOAH PHASES 6 THROUGH 10 'I the culvert analysis for the culvert which crosses Alexandria at Barron Road. Exhibit C-5 shows the detailed hydraulic grade line (HGL) calculations far the storm drain system. Note that the time of concentration for the storm drain system is 21.'~ minutes {see exhibit C-3, 35-HWI.) 'The starting elevation (210.3) for the HGL calculations is based on the elevation of the water surface of Detention Pond #1 at the time of concentration of the storm drain system (see exhbit D-1, Event = 10.) This analysis shows that the storm drain system meets the requirements of the ordinance (0.5' freeboard). DETENTION FACILITY DESIGN CRITERIA: The storage routing for both detention ponds is based on a triangular hydrograph routing of the peak flows based on the rational method and a time base of 3'~ Tc, with the peak flow at the time of concentration. The storage routed' is performed in Microsoft .Excel using tlae storage. indication curve method. The storage vohune is computed using the trapezoidal approximation of volume and the discharge rating curve is based on the linear combination of the weirs, orifice, and culverts. Note that the orifice equation is used to approximate a culvert under headwater control for detention pond #2. The fads are analyzed for the S, l0, 25, S0, and 100 year events.. The triangular hydrographs for .drainage areas which are not routed through. the pond arc linearly .convoluted with the routed hydrographs to demonstrate the resultant hydrograpl~s. DRAINAGE REPORT 3 `4f' SHENANDOAI-1 PHASES 6 THROUGH i 0 F~ r~,a Lei DETENTION FACILITY DESIGN: Two detention facilities are required for this development. The main detention pond (Pond #1) will be located near the existing stock pond in the proposed city. park. This pond will detain most of the runoff. A second small detention pond {Pond #2) will be located in the southern corner of the site.. This pond will detain water from a portion of Phase Nine. Storm water from troth ponds will discharge into tributaries of Spring Creek. The detention ponds serve to detain all design storms. Exhibit D shows the routing. for Pond # 1 and the entire drainage system on that outfall. The hydrographs called "Total Existing" and "Total Proposed" correspond to the hydrograph at Study Point Rio. 1. Study Point #1 is located on the larger tributary-where it leaves the site {see Exhibit B.) Storm water from Phase Ten will be captured in uilets and discharged directly into the tr~utary. Pond #l has been designed to over-detain storm water so the Post-Development flow will not exceed the Pre-Development flow at Study Point #1. The discharge rating curve for Detention Pond #1 is based on a 3b" R.C.P. culvert with sloped headwall and tailwater as appropriate for the cbarniel and a ten foot {10~ long earthen weir at elevation 291.5. With this design, no water exits the weir during the ten year event, and only eleven c£s (Q.50' depth) .crosses the weir during the one hundred-year event. The overflow weir is located. such that the weir elevation coincides with the natural ground (no drop) and flows crossing. the weir will traverse the wooded area back to the natural creek channel. In this manner, even urge events will not erode the park. Exhibit E shows the routing and hydrograph plots for Pond #2. The hydrographs called "Total Existing" and "Total Proposed" correspond to the hydrograph at Study Point No. 2 Study Point #2 is the discharge point of Pond #2. The l U0-year event for Pond #2 is contained in the pond .DRAINAGE REPORT 4 SHENANDOAH PHASES b THROUGH 14 'i ~'°' ~.~~~ ~1 ~_ ~~, ~ ~~ -, i and released through the pond outlet device. The area which drains to the culvert under Barron Road (to the north} is substantially reduced by the construction of the roadways and .drainage system. Because the area (and. the corresponding flow) is reduced from 7.47 acres to 3:74 acres, no detention is provided for this outfall. The existing culvert under Barron Road is undersized, and will have to be replaced when Barron Road is upgraded. The following summary table shows the Pre-development and Post-development flows at the study point. Study Point #1.(Tributary at Property Line) Design Event Pre-Development Post-Development Water Surface Elev: Qs= 126 cfs 110 cfs 291.1 Qio° 144 cfs 114 cfs 291.4 Qzs- 166 cfs 121 cfs 291.8 Qso- 189. cfs 132 cfs 292.0 Qioo 215 cfs 154 cfs 292.0 i op of tserm = ~y~.~ Study Point #2 (Outlet of Pond..#2) Design Event Pre-Development Post-Development Water Surface Elev: Q5= 8 cfs 8 cfs 281. i 0 Qio 9 cfs 8 cfs 28'1.50 Qzs- 11 cfs 9 cfs 282.00 Qso= 12 cfs 9-cfs 282.40 Q,~ i4 cfs 10 cfs 282.90 op of tserm = ~a~.uu DRAINAGE REPORT 5 SHENANDOAH PHASES 6 THROUGH 10 -.,>> ~~~ .~ r CONCLUSION: The Past-development flows for. this development are reduced below or equal to the Pre- development flow for the 3, i 0, 23, 50, and.100 year storms. The drainage design for this. site meets the. requirements as stated in the City of College Station Drainage Policy and Design Standards. DRAINAGE REPORT 6 SHENANDOAH PHASES 6 THROUGH 10 o _-, .;. _ ZONE A - ,.1 7 J --ti;~•• ~ooa c -~ <<o a ~° ~~ _} .p ~~ ~ \~`` i~ _~ ._ o v ~f /i'~ _ City of College Station 480083 /// (' / / ~~ ~,u 7 s~ / ,\ _ , i ~~ ; ~~\ '~ \ -'I ~ ~-- L ZONE X /~ /~ ~~ ~~ Brazos County // 1 ~ Unincorporated Areas /~ (I 481195 \` ./~ ~l l ~I ~~ '~ ~ \`a ~~ \, p /-'~ - `\ C~~ ~~ ~~ C~'r e e' Scale: 1" 1000 v i EXHIBIT A Flood Insurance Rate Map Excerpt Brazos County, Texas and Incorporated Areas Mop Numbers: 48041 C0205C Effective Date: July 2, 1992 -, L-: ~: ~ I I N C ++ 7 V O ~ ~i U ~ ~ ~ L ~a U d F,_, °' a ~ .i Q LI.I !~ Z 3 Q W O = LL ~ c 0 w O to ~ O W ~ O I~ ~ C'7 O M r O N N N O GD O O O) ~ h ~A N O O ~1' O ~ OOL~I O CA N lf) ~ r- O C'. 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[ l'~ \O 00 00' M ~ ian ~ [ iB ~ o -~ o o a . p . . ~ o ~i o c' o c~i L'a.IE a~EnlY..iQ co .-• ' ri N o M *o ' (~. ~7 00 00: d V ~a.~~ a~eu~~aQ as as n~o~anp z z ~ ~ z z a~gu~B~Q ¢ ¢ ¢ ¢ ¢ ¢ ~aaa~S Pau~gao~ z z z z z z °OI~T~~2I~ ¢ as a ~ ¢ w ~~~I~II~Q ° ° ~ r ~ ~ oD ~ N ~ X ~ U N i .~_ ~ M ~ O W rn f°,,^q uJ r EXHIBIT C-3 SHENANDOAH PHASES 6-10 ® F+ a ~ W ~ ~ U ~ ~ ~ H ~ ~ ~ •~' A t~ bn •~ °' A °~~' ~ ~ 3 ~w ~ •~ ~ ~ ~ ~ ~' ~ ~w ~ .?~ ~.., ° z ~ a a a 3 w .~ a~ ~ ~ o ~ w ~ ~ a ~ ~ ~ a ~ ~ ^~ ~ H ~ Ua H ~ F ~ F C7 w ~ # # Ac. min yr cfs cfs # cfs % fps min min ' 1 2 0.8 8.8 10 7.5 9.4 7 9.4 0.93 18 5.3 31 0.1D 8.92 2 5 1:4 8.9 10 13.0 16.3 1 16.3 2.77 18 9.2 46 0.08 9.00 36 4B 0.5 5.1 100 8.3 10.4 1 10.4 2.98 15 8.5 31 0.06 5.13 4B 5 1.3 5.4 100 20.7 20.7 1 20.7 0.52 27 5.2 155 0.50 5.90 5 10 2.8 9.0 10 25.1 25.1 1 25.1 0.43 30 5.1 308 1.01 10.01. 66 7 2.4 11.4 10 19.4 24.2 1 24.2 1.32 24 7.7 31 0.07 11.48 7 10 3.0 11.5 10 24.3 30.4 1 30.4 2.08 24 9.7 46 0.08 11.56 8B 9 0.9 5.3 10 9.6 '11.9 1 11.9 0.66 21 5:0 31 0.10 ' 5.41 9 10 1.4 6.6 10 14.5 . 18.2 1 18:2 0.74 24 5.8 46 0.13 .6.72 10 15 7.2 11.6 10 58.5 58.5 1 58.5 0.89 36. 8.3 308 0.62 12.18 11B 12 2.8 16.3 10 19.2 24.1 1 24.1 1.30 24 77 31 0.07 16.39 12 15 3.4 16:4 10 23.5 23.5 1 23.5 0.66 27 5.9 46 0.13 16.52 13B 14 12 6.8 10 12.4 15.6 1 15.6 1.11 21 65 31 0.08 6.90 14 15 1.7 6.9 10 16.8 21.0 1 21.0. 0.99 24 6.7 46 0.12 7:02 15 20 12.3 16.5 10 84.4 84.4 1 84.4 0.81 42 88 308 0.59 17.11: 1'66 17 2.5 19.9 10 15.5 19.4 1 19.4 0.85 24 6.2 31 0.08 19.96 17 20 3.1 20.0. 10 19.4 19.4 1 19.4 0.45 27 4.9 46 0.16 20.12 1$B 19 1.2 7.7 10 11.9 14.9 1 14.9 1.01 21 6.2 31 0.08 7.76 19 20 1.7 7.8 10 16.0 20.0 1 20.0 0.90 24 6.4 46 0.12 7.88 20 25 17.1 20.1 10 105.9 -105.9 1 1.05.9 0.63 48 84 308 0.61 20.73 21 B 22 1.7 8.5 10 15.6 19.5 1 19.5 0.85 24 6.2 31 0.08 8.63 22 25 2.4 8.6 10 21.8 21.8 1 21.8 0.57 27 5.5 46 0.14 " 8.77 23B 24 1.2 8.7 10 11.3 14.1 1 14.1 0.92 21 5.9 31 0.09 8.76 24 25 1.7 8.8 10 15.5 19.4 1 19.4 0.85 24 6.2 ' 46 0.12 ' 8.88 25 32 21.2 20.7 10 129.1 129.1 .1 129.1 0.21 Box 6.5 203 0.52 21.25 5 4 26 27 0.5 5:0 10 5.7 ' 7.2 1 7.2 0.54 18 4.1 37 0.15 5.15 27 32 0.7 5.2 10 7.4 ' 9.2 1 9.2 0'.89 18 5.2 19 0.06 5.21 28B 32 0.6 6.3 10 6.6 8.2 1 8.2 0.71 18 4.7 45 0.16 6.43 29 30 0.2 5.0 10 1.8 2.3 1 2.3 0.1.4 15 1.8 ` 45 0.41 5.41.. 30 32 0.2 5:4 10 2.5 3.1 1 3.1 0.27 15 2.5 19 0.13 5.53 31 B 32 0.6 5.1 10 6.8 8.6 1 8.6 2.02 15 7.0 ' 19 0.04 5.15 32 35 23.4 21.3 10 140.5 '140.5 1 140.5 0.25 Box 7.0 '177 0.42 21.67 5 ' 4 33 34 1.0 5.3 10 14.6 13.2 1 13.2 0.39 24 4.2 ' 31 0.12 5.45 34 35 1.6 5.7 10 17.0 17.0 1 17.0 0.35 27 4.3 56 0.22 '5.93 35 HW1 25.0 21.7 10 148.5 '.148.5 1 148.5 0.27 Box 7.4 298 0.67 22.34 5 4 40B 41 1.2 5.1 10 13..5 16.9 1 16.9 0:65 24 5.4 '',, 31 0.10 5.15 41 42 2.2 5.2 10 24.1 24.1 1 24.1 0.70 27 6.1 '; 68 0.19 5.34 42 46 2.2 5.3 10 23.9 23.9 1 23.9 0.69 27 6.0 '127 ' 0.35 5.69 43 448 0.8 5.0 10 9.3 11.6 1 11.6 0.30 24 3.7 '' 31 0.14 ' 5.14 °Includes 25°~ Flow Increase for pipe s'¢es <27" dia. *' See Plan & Profile for pipe slope used (Pipe slope >or= Friction slope) 6/10/98 9703-dra.xls Exhibit C-3 ,,r~ ii'j i ~< '~, '~ ,_ _, (.: EXHIBIT C-3 SHENANDOAH PHASES 6-10 O w + ~ U ~ ~ H ~ ~. ~ ~ A a bn ... ~ A -~ ~ ~ ~ w ~ ~ .~ ~ ~ ~ ~ d W ~ a ~, Z , a ~ a W .~ ~, a o ~ ° W ~ ~ ~ ~ -W-1 H ~ H w H ~ h ~ ~ W # # Ac. min yr cfs cfs # cfs % fps min min ' 44B 45 1.8 5.3 10 19.3 ' 19.3 1 19.3 0.45 27 4.9 68 '0.23. 5.54 45 46 1.8 5.5 10 19.1 19.1 1 19.1 0.44 27 4.8 127 0.44 5.98 46 HW2 4.3 6.8 10 42.6 42.6 1 42.6 0.75 33 7.2 87 0.20 6.96. 50B 51 0.7 5.7 10 6.9 8.6 1 8.6 0.78 18 4.9 72 0.25 5.94 51 52B 0.7 ' S.9 10 7.6 9.5 1 9.5 0:95 18 5.4 182 0.56 8.50 52B HW3 1.3 ' 6.5 10 13.2 16.5 1 16.5 0.61 24 5.3 24 0.08 6.57 55A 55B 0.2 5.0 10 2.5 3.2 1 3.2 0.60 13 3.4 13 '0.06 5.06 556 HW4 0.5 5.1 10 5.1 6.4 1 6.4 0.43 18 3.6 24 '0.11' 5.17 606 HW5 0.8 ' S.0 10 9A ' 11.2 1 11.2 1.32 18 6.3 24 0.06 .5.10'. 65 66 0.5 ' 5.0 10 6.0 7.5 .1 7.5 0.58 fi$ 4.2 31 0.12 ' 5.12 66 68 1.1 5.1 10 11.9 14.8 1 '1.4.8 1.01 21 6.2 41 0.11 5.23 67 68 0.2 ' 5.0 10 2.1 2.6 1 2.6 0.18 . 15 21 31 0.25 '..5.25. 68 69B 1.7 5.2 10 18.0 22.6 1 22.6 1.15 24 72 196 0.46 '5.70 69B 72B 2.9 8.2 10 26.8 26.8 1 26.8 0.86 27 6.7 64 '.0.16 :8.39 70 71 0.8 5.0 10 8.3 ' 10.3 1 10.3 1.12 1$ 5:8 43 '0.12 '5.12` 71 72B 1.5 5.3 10 16.4 20.5 1 20.5 1.92 21 85 319 '0.63 '5.95` 72B HW6 ' S.1 8.4 10 47.0 47.0 1 47.0 1.51. 30 9.6 24 '0.04 8.43 °Inoludes 25% Flow Increase for pipe sizes <27" dia. ~ a. See Plan 8 Profile for pipe slope used {Pipe slope >or-- Friction slope) ,i __~ 6/10/98 9703-dra.xls -Exhibit £-3 ,--~ ~~„4a `'~I t , 0 x ~ 1 v 1 1 ~ ~ ~ a ~ 1 ~ 1 1 1 1 1 ~ 1 1 c'v 1 I ~ 1a1 ~. °" 1r 1 x w z O W ~ ~ ~" 111 0. m `l ~, O j V LLI N w ~ ~ a ,~ O c `3~ o m ~ ~ # m o ~ ~ ~ ~ v - ~c ~ c3 ~ N~Q~a of J N L C t W = N + + J Y w + 11 u O II_ J Z W m m .~ m c'3 L g s 0 J + W ~ O II L II w g rn R U ° S .. nM~ o~ m ,'"~~ L ~~,~~.IsS cy v +~ ~ o ~ ~ ~ v U o a.o~'a.4aa.a~.actaan.o~a.Qoaa~o~c~'~ooooo`~ooo ' ~MOO~~ti')NOtoI~-ti371139t~etN~tt100I~-Ott7139139ret~1'QOd'Mti)OPti~'-O~ rrCr?00 p33300Oti/~Oqi;ppnOr00O4f~LDN00M1~9~d'r~NOlAtiM00 C~~I®,[~~rE~ NNrOt7aQOCi~rC7OtOO1•itV~CVrrthlrNrnLVCVhItVtgairNr z ~ Q ~ W W vas a,. ~~ m 0 d Z W ~ Z v_~ ~~ W ~~ ~` ~~1~~~q ~~{~O~N t~~cND.~.fd?u009,~v~cO~7rM~fNMt~d~,rOCOACO?CQM~~irOOU~CrO_ W ~oNOCMq O Nrrrrc-rNrNN~t11eC~~~ht91S~1S7it394t100~C?d?pOC~att7tL)SA~jpNMtl~Iti00 ~°-F'I~ I~ NNNCa'vNNNNNNNNNNNNNNNNNNr°~NMMr°9MMt+1McOr?MOMROO MM0p MtAODOC)NG1900OMO00OCDNC3)h0000 00M~ptgrtn r WONM h- r a0 CS NN t(9 tO' # M M (tp~Y O ~p~j~ P~ r F`~ ~Mi to O M M tpp3~~) O h- Lf~ 1`~ N~ 'V' O} CD OpD ~~1O7ti ctCSJD,? r ~~II .I~ ~ ~,!I ~~ N~~ CSS ~~~ N N N N N N N' N~ N N N N N N N ~' M c'~ M cO~1 M' M ch C7 M M M M r M t~ 00 N N 0 09 M r ~t M N N t~ 0 00 ~ q9 0Q N 00 1fJ r 1q tD r Q0 O N M a'3~H1[L.1~[ty~ Ornh3D~ttlco~hur]rMC~tht~pc"stP~'tl:Or c'~GPtAC37M~DO~oOCi1tAOCM ~CII '~ hINNLV NN(V tV NCV MMM~Mjc'Mt.[) tA~CODUOiOC~C]O1a')~j~fii[)cV c'~-CS1'~GO 9I~rI~~I NNNNNNNHNNN'NNCV NN~NNCOtidNNMNedoMrQiMMMMC~MMC~ MOrre~ M~p 00NNOChMc- MN~t~p ti?~NrNt'7G9I~Oe+-~M~Y139 e~~.i~li t;~ O r W O 00 tp CD 1` h: OC) r M C9, t+'7i ~ r d' tU' d' O d' 'fit; N CO tp pO~~ r *J. 00 ~t! t,0 rrq~ Cp p~p ~ONiON`S~~dNi~ W dN]~~~~~~CM9~'~0O?~~i0 ~O W C933)pOOQCrJ4C1O~ p~;std ~ N N N'N N N N N N N N N N; N N N N N N N N N M N M'N M M M tr! ~cQQ3,M M M CM °t~~(r~ tQ0_ eM` eM- ~ OpE9. 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EXHIBIT"D-1" !i PROPO$<rD C?E7ENTWN POND ROUTING Triangular Rotrting of Pond #1 D.A. # Pond Routin EVENT= 5 D.A. # D.A. # D.A. # D.A. # at a ~ >. o a ,~ + = q vi ~ ~ vii ~ o o .~ w a o! m w is ,,o O~ a C ° x ~z O x Q 171.8 29.7 59.2 50.9 91.0 Tc 21.9 25.2 5.0 25.2 39.2 Inc 2:0 Time cfs cfs cfs Cfs cfs ft cfs cfs cfs ds cfs cfs 0.0 0.0 15.68 0.00 0.00 0.00 284.0 0.0 0.0 0:00 0.0 0.0 0.00 2.0 15.7 47.03 0.00 95.68 9.31 285.3 2.4 23.7 35.33 4.0 4:6 8.69 4.0 31.4 ' 78.38 2.76 47.03 22.14 286.1 4.7 47.3 74.18 8.1 9.3 17.37 6.0 47.0 109.74 20.75 81.14. 30.20 286:6 7.1 53:2 90:51 12.1 13.9 26.06 8.0 62.7 141.09 50.65 130.49 39.92 287.2: 9.4 41.4 90:76 16.2 18.6` 34.75 10.0 78.4 172.45 94.53 . 191.:75 :.48.61 287.6 11.8 29.6 89:98 20.2 23.2 43.44 12.0 94.1 203.80 152.30 266.97 57.33 288.2 14.2 17:7 89:23 24.2 27:9 52.12 14.0 109.7 235.15 227.66 356.11 64.22 288.7 " 16.5 5:9 88.65 28.3 32.5 60.81 16.0 125.4 266:51 322:26 462.81 70.27 289.1 18:9 -0A 89.14 32.3 37.2 69:50 1$.0 149.1 ',297.86 . 441.16 588.79 73.81 289.4 . 21.2 0.0 95.05 36.4 41.8 78.18 20.0 156.8 328.22 582:93. 739.02 78.05 289.8 23:6 0.0 101.64 40:4 46.5- 86.87 22.0 i 71.4 335:06 750.94 ' 911.15 80. i 1 290.1 25.9 0:0 106:05 44:4 51.1' 95.56 24.0 163:6 319:38 925.43 1086.00 80.28 290.3 28.3 0.0 ' 108;59 48.5 55.8 104.25 26.0 155:8 303.71 1083.92 1244.81 ' 80.45 290.4 29.2 0.0 109:69 50.1 60.4 110.49 28.0 147.9 288.03 1226:44 1387.62 L80.59 290.6 28.1 0.0 108!65 48.1 65.1 ' 113.11 30.0. 140.1 272.35 1353:02 1514.47 '.80.72 290.7 . 26.9 0.0 107!60 46:0 69.7 115.74 32:0. 132.3 256.68 ' 1463.70 1625.37 '.80.84 290.8 25:7 0:0 106:54 44.0 ' 74:3 118.36 34.0 124.:4 241.00 ' 1558:51 1720.37 80.93 290.9 24:5 0.0 105.45 42.0 79.0. 120.99 36:0 116.6 225.32 '1637:23 :1799.50 ~ 81;14 291.0 23.3 00 104:48 40:0 83.8 123.62 38.0 108.7 209.64 1699.10 1:862.55 '8173 291.0 22.2. 0.0 103:89 38.0 88.3. 126.24 40.0 100.9 193.97 ' 1744.42 1908.74 '82.16 291.1 21.0 0:0 103:14 35.9 90.1 126:01 -42.0 93.1 178.29 1773x50 1..938:38 82.44 291.1 19.8 0.0 90224 33.9 ' 87.8 ' 121.67 44.0 85.2 162.61 1786.66 1951'.79 '82.57 291:1 18.6 0.0 101.19 31:9 ' 85.4 ' 1.17.33 46.0 77.4 146.94 , -1784:18 194927 '..82:54 291.1 17.4 0.0 99.99 29:9 83.1 112.98 48.0 69.5 131.26 1766.37 1931:12 82.37 291.1 16.3 0.0 98:64 27:9 80.8 ' 108.64 50.0 61.:7 115.58 1733.51 1$97:63 82:O6 291.1 15.1 0.0 97:14 25.8 ' 78.5 ' 104:29 52.0 53:9 99.91 1685.89 1849.10 '.81..60 291.0 13:9 0.0 95.51 23:8 ' 76.1 99.95 54.0 46.0 84.23 1623:78 . '.1785.80 81:01 291:0 12.7 0.0 93:73 21.8 73.8 ' 95.61 56:0 38:2 68.55 1546:17 1708:01 ...80.92 290.9 11.5 0:0 92.47 19.8 71.5 91.26 88.0 30.4 52.87 ' 1453,07 1:614:72 '80.83 290.8 10.4 0.0 91.19 17:8 69.2 ' 86192 ..60.0 22.5 -37.20 ' 1344.52 1505:95 80.71 .290.7 9.2 0:0 89:90 15.7 66.8. I 82.58 62.0 14.7 -< 21.52 1220.54 :1..381.71 80.59 290.6 8.0 0.0 88;59 13.7 64.5 ' 78.23 64.0 6.8 6.84 ' 1081.17 1242.06 80.44 290.4 6:8 0:0 87.27 11 c7 62.2 73.89 66.0 0.0 0.00 ' 927:44 .:1088.01 :80:29 290.3 5.6 0.0 85:93 9:7 ' ' 59.9 ' 69.55 68.0 O:0 0.00 767.20 927.44 80.12 290.1 4.5 0.0 84.59 7:7 ' 57.5 ' 65.20 70.0 0.0 0:00 609.52 767.20 78:84 289.9 3.3 0.0 82:13 56 ' 55.2 ', 60.86 72.0 0.0 0.00 460.72 609'.52 .74.40 289.5 2.1 0.0 76;51 36 52.9 '' 56.52 ?4.0 0:0 0..00 320.31 480:72 ' 70:21 289.1 0.9 0.0 71:1.4 16 50.6 ' 52.17 76A' 0.0 0.00 197:39 320.31 61.46 288.5 0.0 0.0 61.46 00 ' '48.3 ' 48.26 78.0 0.0 0.00 . 98.57 197.39 49.41 287.7 0.0 0.0 49.41 0:0 I 45.9 ' 45.93 80.0' 0.0 0.00 29.94 98:57 34.32 286.8 0.0 0.0 34.32 0.0 ' 43.6 '' 43.81 82.0: 0.0 0.00 0:00 29.94 16.14 285.7 0.0 0.0 16.14 00 I 41.3 ' 41.29 84.0. 0:0 0.00. 0:00 .0.00 0.00 284.0 0.0 0:0 0:00 00 39.0. 38.96 86.0. 0:0 0.00. 0.00 0:00 0.00 284.0 0.0 0.0 0:.00 00 36.6 ' 36.64 88:0 0.0 0.00 0:00 0.00 0.00 284.0 OA 0.0 0.00 0'0 '34.3 ' 34.32 128.0 0.0 0.00 0`.00 0.00 0.00 284.0 0.0 0.0 0:00 00 0.0; ' 0.00 PEAK FLOWS 171 83 .291.1 29 53 110 50 90 128 9703-pnd.xls 0.00 Indicates instal condition ~ F~itaif b-1 ~_~a r ~_~ ', i..i i i ; __ i i- , __.. iF -._ ~, I ti -_-. i ~,4 EXHIBIT." p-1" PROPOSED DETENTION POND ROUTING Triangular Routing of .Pond #1 D.A. # Pond ROUtin EVENT= 10 D.A. # D.A. # .A. # D.A. # ~ a ~rs _ c ° + c q ~ N ~ ~ + c _ ~ a°w ~ o ~u N ~O a ~ a w ~ ~ O vi Qp 194.9 33.8 65.9 57. 904.3 Tc 21.9 25.2 5.0 25.2 39.2 inc 2.0 71me cfs cfs cfs cfs cfs ft cis cfs cfs cfs ds cfs 0.0 0.0 1.7.79 . 0.00 0.00 0:00 ' 284.0 0.0 0.0 0.00 OA 0.0 0.00 2.0 17.8 53.37 0:00 17 79'1 10.32 285.4 2.7 26.4 39.37 4.6 5.3 - 9.92 4.0 35.6 '88,95. 6.1:0 53.37 ' 23.63 286.2 5.4 52.7 81.75 . 9.2 10.7 19.84 6.0 53.4 124.53 28.08 95.05 33.48 '' 286.8. 8.0 59.3 100.87 13.8 16.0 29.76 6.0 71.2 160.11 '66.50 152.61' 43.06 '', 287.3 10.7 48.2 99.94 18.4 ' 21.3 39.88 10.0 . 88.9 195:69 ' 119:49 226:60: 53.56 -, 287.9 13.4 33.0 99:94 23.0 28.6. 49.60 12.0 106.7 231.26 183.06 315.18'. 61.06 288.4 16.1 19.8 98.94 27.6 32.0 59.62 14.0 124.5 268.84 285.96 424.32': 69.18 289.0 18.8 6.6 94.56 32.2 ' 37.3 69.44 16.0 142.3 302.42 ' 407:20 552.80 72.80 - 289.3 21.5 0.0 9426 36.8 42.6 79.36 18.0 160.1 : ' 338.00 ' 555:19 709.62 77.22 289.7 24..1 0.0 101.37 41,4 47.9 ` $9.28 20:0 177.9 372.45 733:02 893.19 ' 80.09 i 290.1 26.8 OA 106.92 : 48.0 53.3 99.21 22:0 194.6 380.21 ' 944:86 1105.47 80.30 .290.3 29.5 0.0 109.82 50.5 58.6 109.13 24.0 185.7 ..362.42 1164`:01 1325.07 , 80.53 290.5 32.2 0.0 112.72 55.1 63.9 17 9.05 26.0 176.8 '344.63 ' 1364.96 1528:44.. 80.74 290.7 33.3 0.0 113.99 57.0 69.2 (26.18 28.0 167.9 326.84 1547:75" 1709:60 80.92 s 290.9 31.9 0.0 112.83 54.7 74.6 .:129.21 30.0 159.0 :309.05 ' 11710!91. 1874.60, 81..84 i '.291.1 30.6 0.0 112.41 ' 52.4 79.9 132.24 32.0 150.1 291.26 '; 1853'':55 2019:97 8321 ';291:1 29.2 0.0 112:44 50.1 85.2 135'.27 34.0 141.2 ', 273.48 1976c05 2144.82' 8A.38 ~, 2912 27.9 0.0 112.27 47.8 '90.5 138.29 36.0 132.3 '.255.69 2078179 2249.53 85.37 ', `297.3 26.5. 0.0 t11.91 45.5 95.9 :141.32 38.0 123.4 237.90 2162:15 ' 2334.48 86:17 ~ 291.3 25.2 0.0 111.37 ' 43.2 101.2 144.35 40.0 114.5 .220.11 2228:48 2400:04 «86.78 , 291.3.. 23.9 0.0 110.64 40.9 103.2 ' :.144.10 42.0 105.8 1202.32 i 2272:15 2446:59 8722 i 291.4 22.5 0.0 .109.74 ' 38.6 100.6 :139.14 44.0 96.7 `184.53 '' 2299150 2474:47 87.48 291.4 21.2 0:0 108.66 36.3 97.9 1 :.134.18 4$.0 87.8 166.74 , 2308;$9 2484.03 87:57 291:4 19.8 0.0 107.41 34.0 95.2 ,129.22 48:0 ' 78.9 748.95 2300;64 2475.62! 87:49 291.4. 18.5 0.0 105.99 31.7 92.8 724.26 50.0 70.0 t31.18 '2275.09 2449:59 :87.25 ' `291.4 1'7.2 0.0 104c40 29.4 89.9 119.30 52.0 61.1 113.37 2232:57 240625 86.84 ~ 291.4 15.8 0.0 102:65 27.1 87.3 114.34 54.0 52.2 95.58 '2173139 2345.94 86.27 `291.3 14.5 0.0 100.75 24.8 84.6 109,38 56.0 43.3 77.79 . 2097'.87 2268.97 85.55 291.3 13.1 0.0 98.68 ` 22.5 81.9 104.42 58A 34.4 60.00 ':2006:32 2175.66 84.67 291.2 11.8 0.0 96.46 20.2 79.3 99.48 60.0 25.6 ' 42.21 1$99':03 2068.32; 83:64 291.2 10.4 0.0 94.09 17.9 76.6 94.50 62.0 16.7 24.42 1776630 1941.24, ! 82.47 291.1 9.t 0.0 91.58 15.6 73.9 89.54 64.0 7.8 7.76 1838:43 1800.73 81.15 291.0 . 7.8 0.0 88.91 13:3 71.3 84:58 66.0 OA 0.00 i 1484!48 1646.19' ':80.85 290.9 6.4 0.0 $7.28 ' 11.0 68.6 79.62 68.0 OA 0.00 ; 132$!09 1484.48' 80.69 290.7 5.1 0.0 85.77 8.7 66.0 74'.66 70.0 OA ' 0.00 ' 1182';04 1323.09 80.53 290.5 3J 0:0 84.27. 6.4 63.3 69.70 72.0 0.0 0.00 1:001:32 1162.04.: `80.36 ' 290.4 2.4 OA 82.76 4.1 60.6 84:74 74.0 0:0 0.00 ' 840!92 1001.32 80.20 290.2 1.1 -0:0 81.26 1.8 58.0 59.78 76.0 ' 0.0 0.00 . 680:85 840.92' 80.03 ' 290:0 0.0 0.0 80.03 0.0 55.3 '55.30 78:0 0.0 0.00 528.04 680.85''; '.76.41 `289.7 0.0 0.0 76.41 0.0 52.6 52.64 80.0 0:0 0.00 : 383183 528.04'': 72:10 289.3 0.0 0.0 72.10 0.0 _ 50.0 49.98 82.0 OA 0.00 . 251.7.0 383.83', .66.37 '.28$.8 0.0 0.0 68:37 0.0 47.3 47.37 84.0 0.0 ` 0.00 138:88 251.10'' 56.11 288.1 0.0 0.0 56.11 : 0.0 44.7 44.65 86.0 0.0 0.00 r 56:67 138.88', 41.11 287.2 0.0 0.0 41.1.1 ' 0:0 42.0 41.99 88.0 ' 0.0 0.00 7:84 58.67 24.41 ' 286.3 0.0 0.0 24.41 0.0 39.3 39.33 128.0 0.0 0.00 ! 0:00 0.00': 0.00 284.0 0.0 0.0 0.00 0.0 0.0 0.00 PEAK FLOWS 1.85... 88' 291.4 33 59 114 5T 103 144 0.00 indicates initat condition 9703-pnd-ids E~diibit Q1 '-1 ~~J i `I ~xwlt~Ir ..o'~„ PROP05E0 DETENTION POND ROUTING Triangular Rout6ng of POttd #1 D.A. # bond Boutin EVEtVT~ 25 D.A. # D.A. # D.A. # D.A. # ~ ~ ,ti a' r c ~ c c c v ~ c v c '~ + 4 c~ ° W m ~ 0 ..,,,,~~ Q. E4..p p a ~ ~ v a w z E~`~ 0 47 223.8 38.8 75.1 88.6 120. TG 21.8 . 25.2 5.0 25.2 39.2 inc 2.0 Time cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs s 0.0 0.0 20.41 0.00 0.00' 0.00 284.0 OA 0.0 0.00 0.0 0.0 0.00 2.0 20.4 61.23 0.00. 20.41 11.57 285.4 3.1 30A 44.69 5.3 6.1 11.41 4.0 40.8 ' 102.04 10.26 61.23 25.49 286:3 6:2 60.1 91:73 10.6 12.3 22.82 6.0 61.2 142.86 37.62 112.29 37:33 287.0 9.2 67.8 174.16 45.8 18.4. 34.23 8.0 81.6 183.68 86.46 180:48. 47:01 287.6 12:3 52.6 111.90 21,1 24.5 45.84 10.0 102.0 224.49 154.98. 270.13 57.58 288.2 15.4. 37.5 110.53 26.4 30.7 57.05 12.0 122:5 " 285.31 247.41 379.47 66.03. . 288:8 18.5 22.5 .407.04 31.7 36.8 68.46 14.0 142.9 306.13 369.3$ 512.73 71.67 289.2 21.6 7:5 100.75 36:9 42.9 79.87 1$.0 163.3 346:95 523.00. 675.51 76.26 289.7 24.6 0.0 100.96 42.2 49.1. 91.29 18.0 ° 183.7 - 387.76 7U9.82 869:94 80.06 290:1 27.7 0:0 ' 107.79 47.5 55.2 102.70 20.0 ===.204.1 427.28 936.99. ' 1097.5$ 80.30 290.3 30.8 0.0 111:10 52:8 61.3 114.11 22:0 2232 436.19 1203.13 1364.27 80:57 290.8 33.9 OA 114.46 58.0 67.5 ' 125:52 24.0 `213.0 ":415.78 1477:62 1639.32 80:85 290.9.. 37.0 0:0 717.82 63.3 73.6 136.93 28.0 202.8 - 395.37 '..1.729:36 1893.40 ' 82.02 291:1 38.2 ' 0:0 120.20 65.4 79.7 145.14 28.0 192.6 ' 374.96 ..'..1956.35'.. 2124.73 84:19 291.2 36:6 0.0 120:84 62.8 85.9 148.84 30.0 182.4 ` 354.55 2159.04 2331:31 .. 88:14 291.3 35:1 0.0 121:24 60.1 92.0 152.13 32:0 172.2 ::334.15 2337.90'' 2513.59 87,85 291,4 33:6 0:0 121:41 57:5 98.1 155.63 34.0 162.0 313.74 '2493.36 2672.04 89:34 291.5" 32.0 0:0 121:36 54.8 104.3' 159.13 36:0 151.8 293.33 2625.88'. 2807.10 '90.61 291.6 30.5 ' 0:0 12i!09 ! 52:2 110.4 162.62 38.0 141.6 ...272:92 2735.89: 2919.21 91:66 291.6 28:9 0:0 120:60 '..49.6 ' 116.5' 166.12. 40.0 131.4 252:51 2823.80' 3008.81 92:51 291:7 27:4 0,0 1'19:91 46:9 118.9 165.84 42.0 121.2 232.10 2890.03 _3076:31 .- 93:14 291.7 25.9. 0:0 119!00 44:3 .115:8` 160.13 44.0 110.9 211.69 _ 2934.99' 3122.13 93.57 291.8 24.3 0.0 117:89 ~~°.41.7 12.8' 154.43 46.0 100,7 191.29 '2959.08' 3146:68 93:80 294.8 22.8 0:0 116:58 39.0 109.7 148.72 48:0 90.5 170,88 '.2962.69' 3150.37 93:84 291.8 21:2 0.0 115:08 '36.4 106.6 ! 143.02 50.0 . 80.3 150.47 '2948.21' 3133.57 93.68 .. 291.8 19.7 ' 0.0 113.38 33.7 .103.6' 137.31 52.0 70.1 130.06 '2910A2 3096.68 93:33 291:7 18:2 0:0 111.49 31.1 100.5 ' 131.61 54.0 59.9 109.65 2854.48' 3040.08 92.80 291:7 16.6 0.0 109:42 ' 28:5 97.4' 125.90 .58.0 49.7 59.24 2779.96 2964.13 92:09 2917 75.1 0.0 ' 107:16 25.8 94.4, 120.20 58.0 39.5 68.83 '2686.82' 2869.20 91,19' 291.6 13.5 0:0 104:73 23.2 ' 91.3 ' 114.49 60:0 29.3 48.42 2575.40 2755.65 90113 291.5 12:0 ' 00 102:12 . 20.5 88.2! 108.79 62.0 ' 19.1 28.02 2446.06 2623:83 88.89 . 291.5 -10.5 0.0 99:34 17.9 85.2' 103.08 64:0 8.9 8.91 '2299.12' 2474:07 87.48 291.4 8.9 OA 96.39 15.3 -_ 82.1 ' 97.38 66:0 0.0 0.00 '2136:19 2308.02 ' 85:92 291.3 7.4 0:0 93:29 12.6 ! 79.0' 91.87 68.0 0.0 0.00 '1967.59 2136.19 $4;30 291.2 . 5.8 0:0 90.14 10.0 76A' 85.96 70.0 0,0 0.00 ' 1802.15 1967:59 82.72 291.1 4.3 0:0 87:07 7.4 ! 72.9 ' 80.26 72.0 0.0 0.00 ! 1639:83 1802.15 81:16 291.0 2.8 0:0 83.92 4.7 ' 69.8 74.55 74.0 OA 0.00 '1478.13 1639.83 80c85 290.9 1.2 0:0 82:07 2.1 66.8 ' 68.85 76.0 0:0 0.00' 1316:76 1478:13 80:89 ' 290.7 0.0 00 80.69 0.0 63J' 63.70 78.0 0.0 0.00 1755.72` 1316:76 ...80.52 290.5 0.0 0:0 80:52 10.0 `60.6; 60.63 80.0: 0.0 0.00 995.01 ` 1155.72 80:36 290.4 0.0 0:0 ' 80.36 OA ' 57.6'' 57.57 82:0 . 0:0 0.00 ' 834.62 995.01 80:19 290.2 0.0 0:0 80:19 0.0 54.5 ' 54.50 .84.0' 0.0 0.00 ` 674.57 834:62 ' 80:03 290.0 0.0 0:0 80.03 0.0 51.4 51.43 86.0 0.0 0.00 522.11 874:57 76:23 289.7 0.0 0.0 78:23 0:0 48.4 48.37 88:0. 0.0 0.00 378.24 522.11. .. ?1.94 289.3 0.0 00 71.94 0.0 45.3 45.30 128:0 0.0 0.00 0:00 . 0:00 0.00 284.0 ' 0.0 0.0 0.00 0:0 0.0 0.00 PEAK FLOWS 223 94 291.8 38 68 t21 85 118 168 0:00 indicates inital condition 9703-pnd.xls l~xhil~it 4-1 EXHIBIT "tJ-1"' PROPOSED DETENTION POND ROUTING Triain~ular Routing of Pond #1 D.A. # Pond Rout in EVEN'T'= 50 D.A. # D.A. D.A. # D.A. # ~ ~ w z ~c ~ Q m J~O v C N N W Qp 253.9 44.1 84.6 .75.5 137.0 Tc 21.9 25.2 5.0 .25.2 39.2 Inc 2.0 Time cfs cfs cfs cfs cfs ft cfs cfs cfs cfs cfs cfs 0 0 0.0 23.17 0.00. 0.00 0.00 284.0 0.0 0.0 0.00 0.0 0.0 0.00 . 2.0 232 69.52 0.00 23.17 12.90 285.5 3.5 33:9 50.26 6.0 7.0 12.99 4.0 46:3 115.87 14.62 69.52 27.45 286.4 7.0 67.7 102.17 12A 14.0 25.98 6.0 69:5 162.22 50:65 130.49 39.92 287.2 10.5 76.2 . 126.60 18.0 21.0 38.97 8:0 92.7: 208:56 109.66 212.87 51':61 287.8 14.0 59.3 124.87 24.0 28.0 51.96 10.0 115.9 254.91 195.63 318.22 61:30 .288.4 17.5 42.3 ' 121.1.3 30.0 35.0 64.95 12.0 139.0 301.26 310.70 450.54 69.92 289.1 21.0 25.4 116.32 36.0 42.0 77.94 14:0 162.2 '- 347.61 463.03 611.96 74:47 289.5 24,5 8.5 707.44 42.0 49.0 90.93 16 0 185.4 393.96 650.63 810.83. 80.00 290.0 28.0 0:0 108.01 48.0 55.9. :1.03.92 . 18:0 208:6 440.30 884.10 1044:59 80.24. 290.2. 31.5 -0.0 11.1.75 54.0 62.9 ` 116.91 20.0 231.7 "..485.18 11'63.35 1324.40 80.53' 290.5 35A 0:0 115:54 60.0 69.9 129.91 22.0 253.4 495.29 1486.80 1848:52 80.86 290.9 38.5 Oi0 119.38 66.0 ' 76.9 142.90 24:0 241.9 472:11 :1816.39 .1982:09 82:85. 291.1 42.0 0'.0 124.87 72.0 83.9 :155.89 26.0 -230.3 448.94 2117.04 2288.50 85:73 291.3 43.4 00 129.1.3 74.3 ' 90.9 ' 165:24 28.0 ' 218.7 425.77 " 2389.29. "2565:98 88:34 291.4 41.6 0':0 129.99 71.3 97.9 > 169.24 30.0 207.1 .402.59 " 2633.69: 2815:06 90!68 291.6 39.9 00 130.58 68.3 ' 104.9 173.23 32:0 t95.5 379.42 `2850.76 3036.29 92:76' 291.7 38.1 0:0 130.91. 65.3 111:9 177.23 34:0- 183.9 356:25 '.3041.01 3230.18 94:59 291.8 36.4 0:0 130.98 ' ' 62.3 118.9 181..22 36.0 172.3 333.07 3204.94 .3397.25 96:16 291.9 34.6 060 130.80 58.3 ' 125.9 185.22 38.0 160:7 309.90 '3343.05 3538.01 97!48 292:0 32.9. 0:0 130.37 56.3 132.9 189.21 . 40.0 1492 386.72 3452.15 '..3652.95 100! 40 292.0 31.1 0:0 131.54 53.3 135.6 188.91 42.0 137.6 263.55 3533.36 3738.88. 102:76 292.0 29.4 0'.0 132.15 50.3 132.1 182.41 44:0. 126.0 240.38 358821 3796.91 104:.35 292.0 .27.6. 0:0 131.99 47.3 128.6 175.92 46:0. 114.4 21720 3618.14 3828.5$ 105:22 292.0 25.9 0.0 131.11. '44:3 125,1 169.42 48.0 102.8 194.03 3624.52 °3835.34 105.47 292.0 24.1 0.0 129.55 41.3 121.6 162.93 50.0. 91.2 170.86 3608.65 .3818.55 . 104,95 292.0. 22.4 0.0 127.34 38.3 : 118.1 156.43 52.0 79.6 147:68 3571.76 3779.51 103:87 292.0 20.6 OA 724.51 35.3 ' 114.6 149.93 54:0 68.0 ' 1:24.51 3514.99 3719.44 102.22 292.0 18.9 0.0 121.11 32.4 111.1 143.44 56:0 "56.5 '.101.33 3439.45 3639:50 100:03' 292.0 17.1 0.0 117.16 29.4 107.6 136.94 5$.0 44.9 78.16 3345.77 3540.78 97,5'1 292.0 15.4 0.0 112.89 ! 26.4 : 104.1 130.45 60:0 33.3 54.99 3231.11 3423.93 96:41'.. 291.9 13.6 0.0 .110.04 23.4 :100.6 .123.95 62' 0 21.7 31.81 3095.87 3286.10 95.11 291.8 11.9 0.0 107.00 20:4 . 97.1 117.46 64! 0 10.1 10.11 2940:44 .3127.69 83:62 291.8 10.1 0.0 ' 103.76 17.4 93.6 110.96 66! 0 . 0.0 ' -0.00 .2766:64 2950.65 91'.96' 291.7 8.4 0.0 100:34 14.4 90.1 104.47 68! 0 .. 0.0 0.00 2586:18 2766.64 90.23' 291.6 6.6 0.0 96.86 . 11.4 86.6 97.97 7p.0 0.0 0.00 :2409.12 2586.18 88.53'... 291.5 4.9 00 93.41 8.4 83.1 91.48 72! 0 0.0 0.00 '2235.38 2409.12 86:87, 291.4 3.1 0.0 90.00 5.4 79.6 :84.98 74':0 0.0 0.00 2064.92 2235.38 85.23', 291.3 1.4 0.0 86.61= 2.4 ' :76.1 78.49 76':0 OA 0.00 1897.65 2064.92 83.63 291.2 0.0 0.0 83.63 0:0 72.6 72:63 78'.0 0.0 0.00 1733.54 1897:65 82.06' 291.1 0.0 0.0 ' 82:06 0.0 ' 69.1 69.13 80f0 0:0 0.00 ' 1571.64 1733.54 80.95 , 290.9 0.0 0:0 80.95 0.0 65.6 65.63 82c0 0.0 0.00 1410.08 1571.64 .80.78', 290.8 0.0 0.0 80.78 0.0 62.1 ' 82.14 84'.0 0.0 ' ' .0:00 1248.85 1410.0$ 8Q.62, 290.6 0.0 0.0 80.62 OA 58.6 ' 58.64 86':0 0.0 ' 0.00 _ ' 1087.95 1248.85 80.45 290.5 0.0 0.0 80:.45 0.0 55.1 55.14 88'.0 0.0 0.00 927.37 1087:95 80.29 2290.3 0.0 0:0 80.29 0.0 :51.6 51.65 128':0 0:0 0.00 -0.00 0.00 .0.00 284.0 0.0 0.0 0.00 0.0 0.0 ' 0.00 PEAK FLOWS 253 105 292.0 43 76 132 74 136 '189 9703-pnd.xls 0.00 indicates inital condition ~ ~~~ D-1 ~acl~lBtr ~D-~M PROPOSED D~NT10N POND ROUtING TrlangularRouting of Pond #1 D.A. # Pond Routin EVENT= QO D.A. # D.A. # D.A. # D.A. # C ~. p ID w ~ ~. TC ~ J F 'C7 C yp = t C ? ~ tY 1-- O ~ K C7 X T ~ C N N C ~ N a ~ q 4l t- LLi f~ 287.0 49.9 94.8 85.5 155.7 7C 21.8 25.2 5.0 25.2 39.2 inc Time 2.0 CEs CfS Cfs cfs cfs ft Cfs Cfs cfs Cfs Cfs Cfs 0 0 0.0 26.20 0.00 0.00 0:00' 284.0 0:0 0.0 -0.00 0.0 0.0 0.00 . 0 2 26,2 78:59 0.00 26.20' 14.35 285.6 4.0 37:9' 56:21' 6.8 7.9 14.74 . 4:0 52.4 130.98 ` 19.40 78.59 29.59 286.6 7.9' "75.$ 113.32 13.6 15.9 29.47 6.0 78.6 ' 183.37 64.90 150.38. 42.74 - 287.3 11.9 85.3 139:91 20.4 23.8 44.21 0 8 104.8 235.76 138.49 248.27 55.89 2$8.1 15.9 66.3 138:07 27.2 31.8 58.94 . 10.0 131.0 288.15 ' 241.30 372.25 65.47 288.7 19:8 47.4 132.66 33.9 39.7 73:68 12 0: 157.2 340.54 38547 529.45 72,14: 289.3 23.8 28.4: 124:35 .40.7 47.7 88.41 . 14 0 + 163.4 392.93 570.36 725.71 77.67 289.8 27:7 9.5 114.89 47:5 55.6 103.15 . 16.0 . 209.6 445.32 802.98 963.30 80.16 290.2 31:7 0.0 111.88 54.3 63.6 117.88 18.0 235.8 497.71 :1087.40. 1248.30. . 80.45 290.5 35.7 0.0 116.12 61.1 71.5 132.62 20 0 262.0 ::548.44 :1423.52 1585:11 80:$0 290:8 39:6 0.0 120.42 67.9 79.5 147.35 . 22.0 286.5 559.87 1806.44 '1971.96 ' 82.76 291.1 43.6 0.0 126,35 74.7 87.4 162:09 24.0 273.4 533.67 .2793.38 '2368.31'. 86:46 291.3 47.8 0.0 .134'02 81,5 95.4 176.82 26.0 260.3 507.48 2547,34 ',2727:05 88:86 291.5 49.1 0,0 138.97 .64.1 103.3 187.45 . 28:0 247.2 481.28 ' 2868.94 3054.82 92.94 291.7 47.1 0.0 140:07 80.7 111..3 192.00 30.4 234.1 ''455.09 3158.79 3350.22 95.74 291.9 45:2 ' 0.0 140.87 77.3 119.2 196.56 32:0 221:0 428.89 3415.23 :;3613.88 99.32 292.0. 43.2 0.0 142,49 73.9 127.2 201.11 34.0 ` 207:9 402.70 3632.82 '3844.12 ' 105.85 292A 41..2 0.0 146.84 74.6 135.1 205.67 36.0 194.8 376:50 3813.70 4035.52 ' 110:91 292.0 39.2 0.0 150:12 87.2 ' 143.1 210.22 38.0. ' 181.7 350:30 3959.87 4190.20 ' 115:16 292.0 372 0.0 152.39 -63.8 451.0 214.77 40.0 168.6 324.11 4073.26 4310.18 118.46 ' 292.0 35.2 0.0 153.71 60.4 154.1 214.44 42.0 155.5 297:91 4155.65 4397.37 120:86 292.0: 33.3. 0.0 154e12 57.0 150.1 207.p7 44.0 -142.4 271:72 4208.77 4453.57 ' 1.22:40 292.0 31.3 0.0 153'.68 53.6 146.1 199.70 46:0 129.3 245':52 4234.21 .44$0.49 123:14 ' .292.0 29.3 0.0 152':44 50.2: f42.1 :192.34 48.0 116.2 ` 219.33 4233.49 '4479.73 123:12 292.0 27.3 0.0 150:44 .48.8 1.38.2 184:97 50:0 103.1 193.13 4208.06 .4452.82 ' 122'.38 292:0 25.3 0.0 147.72 43.4 134.2 177.60 52.0 90.0 166.94 4159.27 '4401.19 ' 120':96 ' 292.0 23.4 0.0 144'.32 40.0 130.2 170.23 54.0 76.9 140.74 4088.40 `4326.20 ' 11$!:90 ! 292.0 21.4 0.0 140,28 36.6 .126.3 162.87 56.0 63.8 114:55 3996.68 4229:1.5 116'.23 292.0 49.4 0.0 135'.63 33.2 122.3 155.50 58.0 50.7 88.35 38$5.24 4111.23 112:99 292.0 17.4 0.0 130.41 29.8 1.18.3 148.13 60.0 37.6 ' 82.16 3755.18 3973.59 ' 109.21 292.0 15:4 0.0 124':.64 26.4 114.3 140:76 82.0 24.5 35.96 3607.50 `3817.33 104:91 ! 292.0 13.5 0.0 .11$.37 23.0 ..110.4 133.40 64.0 11.:4 11:43 3443.19 3643.46 ' 100:14 ! 292.0 11.5 ' 0.0 111k61 19.6 106.4 126:03 66:D 0.0 0.00 3261.23 .3454.62 ' 96.70 ! 291.9 9.5 0.0 106.18 16.3 102.4 ' 118.66 6$.0 0.0 0.00 3071.47 '.3281:23 ', 94.88 291.8 7:5 0:0 102:38 12.9 ' 98.4 111.29 70.0 0.0 0.00 2885.29 307.1:47 93.09 . ' 291.7 5.5 0.0 98.62 9.5 94.5 103.92 72.0 0:0 0.00 2702.60 . '2885:29 91'.34 291.8 3.5 0.0 .94.89 8.1 90.5. 96.56 74:0 ' 0.0 0.00 ' 2523.35 2702.60 '' 89.63 291.5 1.B 0.0 91'.19 2.7 86.5 89.19 76.0 ' 0:0 0.00 ' 2347.48 2523.35 87.94 291.4 OA 0.0 87:94 _ 0.0 i 82.5 82.54 78.0 0.0 0.00 ' 2174.89 2347.46 ' 86:29 291,3 0.0 0.0 86.29 0.0 ':78.6 78:57 80.0 ! 0.0 0.00 2005.56 2174.89 ' 84:66 291.2 0.0 0.0 84.66 0.0 74.6 74:59 82.0 0.0 0.00 ' 1839.41 2005.56 . 83.07 291.1 0.0 0.0 83.07 0:0 70.6. 70.62 84.0 0.0 ' 0.00 1678.39 .1839.44 81'.51 291.0 0.0 0:0 $1'.51 0.0 66.6 66.64 88.0 . 0.0 0.00 ' 1514.61 1676.39 ' 80.89 290.9 0.0 0.0 80.89 0.0 62.7 62.6'7 8$.0 0.0 0.00 1353.17 1514.61 80.72 ' 290.7 O.U 0.0 .80.72 0.0 58.7 58.70 128:0 . ' 0.0 ' 0.00 0.00 0.00 : 0.00 284.0 0:0 0.0 0.00 0.0 0.0 0.00 PEAK FkOW3 286 123 282.0 49 85 154 84 154 215 9703-pnd.~ds o.oo-inacates in3tal condition F~chitHt D-1 W ~ Z O ~ ~ ° ~ Q m - N J r- ~ -a Q ~ O.Q ~ O r ~+ ~ `~" ~. Q ~..~~prn f" i ~; ;j ~. W ~ ~ '~,, //~ ~/ / I , I _ // /e /~ / /1 f t I f l ~~ J /~ t ~ ~ / J f 1 ~ ' \ ` ` l 4 a \ ~ ~ oO W Q C h C1 Cp O O o~ h- pO M N l~ I y / 1` 1 II~ 4 ~ ~` ~ ` 4 4~ ~~ ~~ ~~ \\ ~~ ~ ~ ~tR ~\ ~ 3 ~p $ ~ ~p $ g© ~pp S g p O~fl W ~ N O Od0 (O et N ~ N r r a- 'i"' / t- f~~R ~ N ti X w ~ ~ Q C4~ Q. r W { r W W ~ Q ~ Q a ~ ~ ¢ ~ ~ ¢ W 0 1 I 1 I 0 0 r~ ~ ~ fi r o i~ ~ i i r l ~ ~ ~ o ~ ~ ~ i ~ m ~ a ~ ~ ~ ~ ~ r ~ ~ 0 n. c / ~ o ~ ~ ~~ ~~ ° z ~ ,,,, / ! f ~ ~ ; ~ j ~ ~ I: ` W j j i g 4 0 ~ ~ ~ l f `~ £ ~ ~ ~ i- c~ ® ~- ~ '~ r 1` O ~ ~ / M \ 1 t ~~ ~ ~ ~~ o ~ d`~ • ~ N ~, ~,e ~~ ~~ ,~ `~ ~ ~~ ti~ ~y g So g Q o o d g ~ a N N ~- (s~~) D ao c~ rn~ ti X W s '~ sit © i 0. ~ 0 O ~ o oC .~' e~ _ ~- .~ N ~- /+ // / ~~ ! ~ / 1 i J / ~ / 1 ~ l ~ / 1 / 1 ,r i l / / / ~ / / 1 ~ ~ ~ { / - 1 a ~ ~ ~ ~ 1 r ~ ~~,, ~ t~ ~~ ~ ~ ~~ ~ ~\ ~~ 0 ~~ ~` ~~ ~~ '* \~, ~4 ~ ~~ \` ~~~, $ o $ q cu N °- `_ isa) D S g Ci C1 ti a m ;- 0 0 a 0 ~- GO N O'i 0 ... i~ ;p X LU r ~~ r ~ i ~ r ~ ~w ~ ~ i i i ~ f i ~ ,~ r ~ J / ~ ,~ / i ,/ / / - ,~ f ~ f ~ / f ! - 1 ~ ~ ~ ~- 1 i \ ~ 1 ~ 1 1 ~ / ~ i 1` ~~ ~ 1 ~~ ~ `~` '~~ \~. ~~ ~R ~ ~~ \~ \\ S g 0 0 S $ '~ w 0 0 0 °o N g S 0 m cv ~Q a~ ~,,, ~~ x w tla o spp pp a O ~ O t[1 O N ~^ e- (S;a} D ~~~ t ~ ~ C ~~„ d ~ o ~~ c = c ~ m W ~ ~ ~ °o .~ ~, ~- ~ a $ ,~ ~~ ~~ t f 1 / e~ J i ~ / / ,/ 1 1 ,{ r ~ t f ~ ~' ~ ~ i ~ ~ ~ /~ ~` f 1 1~ t ~ 'y, \ \ ~,~ q ~,, \ 4 `~ ~ ~~ ~ ~~ ~, ~.\ ~ ~~ `~ tslal D 4 a 0 °o g ~~ ~. °a ti M 0 S 4 .- ~- $ $© c op N ~ 0 .~, ~`` .Q L X W M N rn N r ~ N ~.~. a~ ov ~ ~ '~' ~ ~o N N .~ ~ m ~ ~ ~ '' AA N ~.V; L. `~ N ~t.L_ r N N M pp p pp N p ~ O ~ d ~A O ~ O ~ Q 4'i d' d' fh ~"~ cV (V r r O O (•~-ae) a6eao3S ch O_ ~_ L X W 0 c~i N O CV N O W N O O N r O of N wV E C m ~ ~ e .+ C N O v W ~a ~~ ~m o f N . ALL r O f0 N O N O N Q p po N S O O ~ O O p j p ~ ~ N tV O O .. ~ r (sue) a6~ey~s[n M w L W ,~I 1 ~~i ~m~„~ I ~ .: EXHIBIT °'E-1" PROPOSED DETENTION POND ROUTING FOR POND #Z SHENANDOAH PHASES 6-10 D.A # D.A. # Pond Rout ing EVENT= 5 D.A # ~ o. o x a c a a w m ~ U + + ~ ~ ~ N ~ ~ ~ N er ~ ~ C7 ~ ~ R cd a w o w N as p~ f- a x w (7 ay Oit f- w Qp Tc 45.6 8.4 8.5 12.5 inc 1.0 Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs 0.0 0:0 0.0 5.43 0.00 0.00 0.00 278.0. 0.00 0.0 0.00 1.0 5.4 5.4 16.29 5.43 5.43 0.00 278:0 0.00 0.7 0.68 3.0 16.3 16.3 38.00 48.86 48.86. 0.00 278:0 0.00 2:0 2.03 5.0 27.1. 27.4 59.71 130.16 134.06 1.95 278:4 1.95 3.4 3.39 7.0 38.0 38.0 81.43 244.77 253:87 4.55 279.1 4:55 4.7 4.74 9.0 44:0 44:0 85.24 391.89 403.36 5.74 279:7 5.74 6.1 6.09 11.0 38.5 38.5 74.38 531.24. 544.37 6.57 280.3 . 6.57 7.4 7.45 13:0 33.1 33.1 63.53 646.82 660.93 7.06 280:6 7.06 $.3 8.33 15.0 27.7 27.7 ' 52.67 739.02 753.91 7.45 280.9 7.45 7.7 7.65 17.0 22.3 22.3 41.81 808.24 . $23.72 7.74 .281.2 7.74 7:0 6.97 19.0 16:8 16.8 30:96 854.86 870.73 7.94 281.3 7.94 6:3 6.30 21.0 11.4 11.4 20.10 879.26 895:34 8:04 281.4 8.04 5s6 5.62 23:0 6;0 6.0 9:24 881.81 897.91 8.05 281.4 8.05 4;9 4.94 25.0 0:5 0.5 0.55 862.87 878.82 7.97. 281.3 7.97 4;3 4.26 27.0 -0:0 - 0:0 0:00 831.93 847.61 7.84 281.2 7:84 36 3.59 29.0 . 0.0 0,0 0.00 . 800.96 816.38 7.71 281.1 7:71 29 2.91 31:0 0.0 0:0 0.00 770.51 785.67 7.58 281.0 7.58 22 2.23 33.0 OA 0.0 0.00 . 740.56 755.47 7:45 280.9 7.45 16 1.56 35.0 ' 0.0 0.0 0.00- 711.12. 725.78 7.33 280.8 7.33 09 0.88 37:0 0.0 0.0 0.00 682:18 696.59 7:21 280.7 7.21 0!2 0.20 39:0 0:0 0.0 D.00 653.71 .667:88 7.09 ` 2$0.7 7.09 00 0.00 41.0 0.0 0:0 0:00 625.72 639.66 6.97 280.6 6.97 0! 0 0.00 43A D.0 0.0 0:00 598:21 611.91 6:85 280.5 8:85 010 0.00 45:0 0.0 0.0 0.00 574.15 584.62 6:.74 280.4 6.74 0:0 0.00 47.0 0.0 0.0 0.00 544.54 557.79 6:62 280.3 6:62 0! 0 0.00 49:0 0.0 0:0 0:00 518.38 531.41 6.51 280.2 6.51 0:0 0.00 51:0 53.0 0.0 . 0.0 0.0 0:0 0:00 0:00 492.66 ' 467.37 505.47 479.96 6.40 6.30 280.1. 280:0 6:40 6.30 0.0 0,0 0:00 0:00 55.0 0.0 0:0 0.00. 442.58 . 454.88 6:15 279.9 . 6:15 0:0 0.00 57.0 0.0 0.0 0.00 418.58. 430.48 5:95 279.8 5.95 0:0 0:00 59.0 0.0 0:0 0.00 395.33 406.86 5:77 279.7 5.77 0.0 0:00 61.0 0.0 0.0 0.00 372.82 383.98 5:58 279.6 5.58 0.0 0.00 63.0 0.0 0.0 0.00 351.02 361.83 5.41 279.:5 5.41 0.0 0:00 64A 0.0 0.0 0.00 340.38 351.02 5.32 279.5 5.32 0.0 0.00 PEAK (LOWS 44, 44 8 281.4 8 8 8 0.00 indicates ihital condition 9703-dra.xls Exhibit E-1 1 ~J lvJ h~ ~-J EXHIBIT "E-1" PROPOSED DETENTION POND ROUTING FOR POND #2 SHENANDOAH PHASES 6-10 D:A # D.A # Pond Rout ing EVENT= 10 D.A. # 4k .c p c CJ ~ w C7 a i w Z C' .+., ~ c ~ vs J O J Ol N m r t C 1 ~ + y- . R Q d H Fa.. (/~ c O a w F- a w t- w x a c.~ N N 9.6 Qp 51.1. 12.5 Tc 8.4 inc Time 1.0 cfs c#s cfs cfs cfs cfs ft cfs cfs cfs 0 0 0.0 0.0 6.08 0.00 0.00. 0.00 278.0 0:00 0.0 0.00 . 1 0 6.1 6.1 18.24 6.08 6.08 0.00 278.0 0.00 0.8 0.76 . 0 3 18.2 18.2 42.57 54.61 54.73 0:06 278.0 0.06 2.3 2.29 . 5 0 30.4 30.4 66.89 145:11 149.77 2.33 278.5 2.33 3.8 3.81 . 7:0 42.6 42.6 91.21 ' 273.86 283.42 4.78 279.2 4..78 5.3 5.34 9.0 49.3 49.3 95.49 439:87 .452:12 6.13 279.9. 6.13 6.9 6.86 11.0 43.2 43.2 83.32 598.00 611.70 6:85 280.5 6..85 8.4 8.38 13 0 ' 37.1 37.1 71.16 ' 729:47 744.28 7.41 280.9 . 7.41 9.4 9.37 . 15.0 . 31:0 39.0 59.00 834.72 850:42 7.85 281.2 7.85 8.6 8.61 17.0 24:9 24.9. 46.84 '' 914.19 930.57 8:19 281.5 8:19 7.8 7.85 19 0 18.9 18.9 34.68 968.32 985.15 8.42 281.7 8.42 7.1 7.09 . 21.0 12:8 12.8 22.52 997.52 1014.60 8:54 281.8 8:54 8.3 6.32 23.0 6.7 6.7 10.35 1002.21 1019.34 8.56 281.8 8:56 5.6 5.56 25.0 0.6 0.6 0.62 982.81 999.77 8:48 281.7 8.48 4:8 4.80 27.0 0.0 0.0 0.00 I 949.92 966:60 8.34 281.6 8.34 4.0 4.04 29.0 ' 0:0 0.0 0.00 916.98 . 933:38 8.20 281:5 8:20 3.3 3.28 31:0 0.0 0:0 0.00 884.59 900:71 8.06 281.4 8:06 2.5 2.51 33.0 0':0 0:0 0.00 852.73 868.:59 7.93 281.3 7:93 1:8 1.75 35.0 0:0 0.0 0.00 ' 821.42 837.01 7:80 .281.2 7:80 1.0 0.99 37.0 ' 0.0 0.0 0.00 790.62 805.96 7:67 281.1 7:67 0.2 0.23 39.0 ' 0.0 0.0 0.00 ' 760.35 775:42 7.54 281.0 7.54 ~-0.0 0.00 41 0 0.0 0.0 0.00 ' 730.57 745.40 7.41 280:9 7:41 0.0 0.00 . 43.0 00 0.0 0.00 ' 701.30 715.88 7.29 280.8 7:29 0.0 0.00 45.0 ' 0.0 0:0 0.00 ' 672.52 686:85 7.17 280.7 7.17 ' 0.0 0.00 47.0 0.0 0.0 0.00 ' 644:22 658.31 7.05 280:6 7.05 ' 0.0 0.00 49:0 0.0 0:0 0.00 616.39 630.24 6.93 280.5 6:93 0.0 0.00 51.0 0:0 ` 0.0 0.00 ' 589.02 602.65 6..81 280:4 6:81 0.0 0.00 53.0 0.0 0.0 0.00 ' 562.12 575.52 6.70 280.4 6.70 0.0 0.00 55.0 0:0 -0:0 0.00 ' 535.66 548.84 6.59 280:3 6:59 0.0 0.00 57:0 ' 0.0 0:0 0.00 ' 509.65 522.60 6.48 280.2 6.48 ' 0.0 0:00 .59:0 0:0 0:0 0.00 ' 484.08 496.89 6.37 280.1 6:37 OA 0.00 61.0 0.0 0.0 0.00 ' 458.93 471..45 6:26 280.0 6:26 0.0 0.00 63:0 0.0 0.0 0.00 ' 434.40 446.57 6.08 279:9 6:.08 . 0.0 0.00 64.0 0.0 0.0 0.00 ' 422.44 434.40 5.98 279:9 5:98 0.0 0.00 PEAK FLOWS 49 49 9 281.8 9 9'' 9 0.00 indicates inital condition 9703-dra.xls Exhibit E-1 i` -n EXHIBIT "E-1" PROPOSED DETENTION POND ROUTING FOR POND #2 '~~ ~~ SHENANDOAH PHASES 6-10 i ~' '' i I ~~' i, t. ~I '~ _, D.A. # D.A. # ' Pond Rotrt ing EVENT= 25 D.A. # ~ °- o _ a d w m (~ + _ - ~ ~ N ~ ~ 'c ~ N d ~ o R d W w ¢ a ~ d W Cry ~ W Qp 58.3 10.9 Tc 8.4 12.5 inc 1.0 Time cfs cfs cfs cfs cfs cfs ft cfs cfs cfs OA 0.0 0.0 6.94 0.00 0.00 0.00 278:0 0.00 0.0 0.00 1.0 6.9 6:9 20.82 6.94 6.94 . 0.00 . 278.0 0.00 0.9 0.87 3:0 20.8. . 20.8 48.58 61.97 62.45 0.24 278.1 0.24 2.6 2.61 5.0 34.7 34.7 76.33 164.59 170.22 2.82 278.6 2.82 4.4 4.36 7:0 48:6 48.6 104.09 312.06 322.24 5.09 279.4 `..5.09 6.1 6.10 9.0 56:2 56.2 108.97 503.31 516.21 6.45 280:2 6.45 7.8 7.84 11..0 49:3 49.3 95:09 686:15. 700.60 7.22 280.8 7.22 9.6 9.59 13.0.. 42.3 42.3 81..21 838.52. 854.26 7.87 281.3 7.87 10.7 10.72 15.0 35:4. ' 35.4 67.33 960.94 977.71 8.39 281'.7 8.39 9.8 ' 9.85 17:0 28:5 28.5 53.45 1053:90 1071.46 8.78 282.0 8.78 9.0 8.98 19,0 21.5. 21.5 39.57 1118.11 1136.06 . $.98 282.1 8.98 8.1 8.10 21.0' 14:6 ' 14.6 25.69 1154:07 1172.23 9.08 282.2 9:08 7.2 7.23 23.0 7.6' 7.6 11.82 1162.10. 1180.31 9.11 282.3 9.11 6.4 ' 6.36 25.0 0.7 0.7 0.70 1142.52 1160.61 9.05. 282.2 9.05 5.5 ' 5.49 27.0 00 0:0 0.00 ' 1107:32 1125.22 8.95 282.1 8.95 4.6 ' 4.62 29.0 0:0 ' 0:0 0.00 1D71:84 1089:53 8.85 282:0 8.85 3.7 ' ' 3.75 31.0 0.0 ' OA 0.00 ' 1036.85 1054.27 8.71 281.9 8.71 2.9 ' 2.87 33:0 0:0 0.0 0.00 1002:45 1019.58 8.56 281.8 8.56 2.0 2.00 35.0 0:0 ' 0.0 0.00 "968.63' 985:47 8.42 . 281.7 8.42 1.1 ' 1.13 37.0 0.0 0.0 0.00 935.37 951:93 8:28 281:6 8.28 0.3 ' 0.26 39:0. 0:0 ' 0:0 0.00 902.67 918.96 8.14 281.5 ' 8.14 0.0 ' 0.00 41.0 0:0 0.0 0.00 870:52 886:53 8.00 281.4 8.00 0.0 ' 0.00 43:0 0:0 ' 0.0 0.00 " 838:91' 854.65 7.87 281.3 7.87 0.0 ' 0.00 45.0 OA 0.0 0.00 807.82 823.30 7.74 281.2 7.74 0.0 ' ` 0.00 47.0 0:0 -- 0:0 0.00 777:25 792.47 7:61 281.1 7.61 0.0 0.00 49:0 0:0 0.0 0.00 747.20' 762.16 7.48 .281.0 7:48 ' 0.0 ' 0.00 51.0 00 ' 0.0 0.00 717.65'., 732.36 7.36 280'.9 7.36. 0.0 ' 0.00 53:0 0;0 ' OA 0.00 688.59' 703.06 7.23 280.8 7.23 0.0 ' 0.00 55.0 0':0' 0.0 0.00 660.02' 674.25 7.11 280.7 7.11 0.0 ' 0.00 57A 00 D.0 0:00 631:93' 645.91 6.99 280.6 6.99 0.0 ' 0.00 59':0 0.0' ' 0.0 0.00 604:30 618:06 6.88 280x5 6.88 0.0 '' 0.00 61:0 0:0 0.0 0.00 577.14 590.67 6.76 280:4 6.76 ' 0.0 ' 0.00 63:0 0:0 ' 0.0 0.00 550:44 563.73 6:65 280:3 6.65 0.0 ' 0.00 64:0 0:0' ' 0.0 0.00 537`25 550.44 6.59 280.3 6.59 0.0 0.00 PEAK FLOWS 56 58 9 282.3 9 11 11 0:00 indicates inital condition 9703-dra.~s Exhibit E-1 EXHIBIT °'E-1" PROPOSED DETENTION POND ROUTING FOR :POND #2 SHENANDOAH PHASES 6-10 D.A # D.A # Pond Rout ing EVENT= 50 D.A.# at a o >. s v o a ~ w m ~ v ~ + ~ ~ in c~ c ~ ~ ~ u~ N ~ c C7 ~ ~~ p m n. w ~ ~ as O~ F- a x w C7 ~v~i O X F- w (gyp Tc 65.8 8c4 12.4 12.5 inc 1.0 Time cfs cfs cfs cfs cfs cfs ft cfs cfs c#s 0:0 0:0 0:0 7:84. . 0.00 0.00 0.00 278.0 0.00 0:0 0.00 1.0 7.8 7.8 23.51 7.84 7.84 0.00 278.0 0.00 1.0 0.99 3.0 23.5 23:5 54.87 69.67 70.54 0:43 278.1 0.43 3.0 2.96 5.0 39.2 39.2 86.22 184.97 191.63 . 3:33 278,8 3.33 4.9 4.93 7:0 54:9 54.9 117.57 352.87 363.72 5.42 279.6 5.42 6:9 6.90 9.0 63.5 63:5' 123.08 570.67 . 584.13 6.73 280.4 8.73 8.9 8.88 11:0 55.7. . 55.? 107.40 779.36 794.59 7.62 281.1 7.62 10.8 10.85 1.3.0 .47.8 47.8 91.73 953.60 970.31 8.36 281.6 8.36 12.1 12.13 15.0 40.0 40.0 76:05 1094.05 1111:87 8.91 282.1 8:91 11.1 11.14 17.0 32.1 32.1 60.37 1201.72 1220.16 9.22 282.4 9.22 10:2 10.16 19:0 24.3 24.3 44.70 1277.08 1295:95 9.43 . 282.6 9.43 9.2 9.17 21:0 16.5 16.5 29.02 1320.50 1339.62 9.56 282.7 9:56 8:2 8.18 23.0 8.6 8.6 13.35 1332.35 1351.53 9.59 282.7 9.59 7.2 7.20 25:0 0:8 0.8 0.79 1312:97 1332.04 9.54 282.7 9.54 6:2 6.21 27.0 0.0 0.0 0.00 1275.93 1294.79 9.43 2$2.6 9.43 5:2 5.23 29:0 0.0 0.0 0.00 1238.53 1257.17 9.32 282.5 8.32 4.2 4.24 31:0 0.0 ' 0.0 0.00 1201.55 1219.98 9.22 282.4 9.22 3.3 3.25 33.0 0.0 0.0 0:00 1164.99 .1183.22 9.11 282.3 9.11 2.3 2.27 35:0 0.0 OA 0.00 1128.85 1146,87 9.01 282:2 9.01' 1.3 1.28 37.0 0:0 0:0 0.00 1.093..11 1110.93 8.91 282.1 8.91'... 0.3 0:29 39.0 0.0 ' 0.0 0.00 1057:81 1075.40 8.80 282.0 8.80 0.0 0:00 41,0 0.0 0.0 A.00 1023:06 1040.36 8.65 281:9 8.65 0.0 0.00 43.0 0:0 0.0 0:00 988:89 1005.90 8.51 281:8 8.51.: 0.0 0.00 45.0 AA 0.0 0.00 ' 95529 972.02 8:36 281.6 8.36 0.0 0.00 47.0 0:0 0.0 0:00 922.26 938.71 8.22 281:5 8.22 0.0 0.00 49.0 0:0 0.0 0.00 889.78 905.95 8.09 281.4 8.09 0.0 0.00 51,0 0:0 O.d 0.00 ' 857.84 873.74 7.95 281.3 7.95 0.0 0.00 53.0 0:0 0.0 0:00 ' 826.44 842.07 7.82 281.2 7:82 0.0 0.00 55.0 0:0 0.0 0:00 ! 795:56 810.93 7:69 281.1 7.69 0.0 0.00 57.0 0:0 0.0 0.00 '. 765.20 780.32 7.56 281.0 . 7.56 ' 0.0 0.00 59.0 0:0 0:0 0.00 735.35 750.21 7.43 280.9 7.43 0.0 0.00 61.D 0.0 OA 0:00 705:99 720.61 7.31 280.8 7.31 0.0 0:00 63.0 A.0 0.0 0:00 .677,13 691.50 7.19 280.7 7.19 0.0 0.00 64.0 0:0 0.0 0:00 '662.88 677.13 7.12 2$0.7 7.12 0.0 0.00 PEAK FLOWS 63 63 10 282.7 10 12 12 9703-dra.xls 0.00 indicates initatcondition ~ Exhibit E-1 EXHIBIT "E-1" PROPOSED DETENTION POND ROUTING FOR POND #2 SHENANDOAH PHASES 6-10 D.A # D.A. # D.A # Pond Routi ng E1/ENT= 100 ~ n. = qp Tc inc Time ° 73.9 8.4 1•U cfs w z v fs ~ c fs ~ N fs c ~' ~ ~ N fs '1 fs c ° aw t 0 W ~ JO ~a fs 00 0 w 13.9 12.5 cfs 0 0 z Jj~ ~w fs 0.00 0:0 0.0 A.0 8.80 0.00 0.00 0.00 278. : 00 0 . 1 1 1.11 1.0 8.8 8:8 26.39 .8:80 8.80 0:00 278.0 1 . 64 0 . 3.3 3.33 3.0 26.4 26:4 61.58 77.90 . 79.18 0.64 278. 9 . 87 3 5 5 5.55 5.0 44.0 44:0 96.77 206.75 214.50 3.87 27$. 9. . 5.77 . 8 7 7.77 7:0 61.6 fi1.6 131.97 396.46 408.01 5.77 7 27 04 7 . 0 10 9.99 9:0 11:0 71.3 62.5 71.3 62.5 138:15. 120.55 643.00 879.29 657.08 895.37 7.04 8.04 280,6 281:4 8 . 8.04 86 8 . . 12.2 7 13 12.21 13.65 13:0 53.7 53.7 .102.96 1076.91 1094.64 8.86 2:0 2 . 32 9 . 12 5 12.54 15.0 44:9 44:9 85:36 1237.18 1255:82 9:32 282:5 8 . 67 9 . 4 11 11.43 17.0 36.1 '36.1 67.77 1360.73 1380.08 9.67 282. : 92 9 . 10 3 10.32 19.0 27.3 27:3 50..17 4448.00 1467,84 9.92 283.1. 2 . 05 10 . 2 9 9.21 24:.0 18.5 18.5 32.57 1499.45. 1519.55 10.05 . 283. 2 . 10 09 . 1 8 8.10 23:0 9.7 9.7 14.98 1515'.44 1535.63 10.09 283 2 3 . 04 10 . 7 0 6.99 25:0 0.9 0.9 0.89 1496.36. . 4516.44 10.04 28 . 283 1 . 9:94 . 5.9 5.88 27.0 0.0 0.0 0.00 1457:37 1477.26 9:94 . 3 0 84 9 4 8 4.77 29.0 ' 0:0 0.0 0:00 1417.91 1437.59 9.84 . 28 9 2 ' . 73 9 . 3.7 3.66 31.0 0:0 0:0 0:00 1378:89 .1398.35 . 9.73 28 . 8 . 62 9 . 2 6 2.55 33.0 0.0 0:0 0:00 1340.32 1359.55 9.62 282. 7 . 51 9 . 1 4 1.44 35:0 0.0 0:0 -0.00 1302:1$ 1321.20 9.51 282: 2 . 40 9 . 0 3 0.33 37.0 0.0 0.0 0:00 1264.48 1283.28 9.40 .6 28 2:4 : 29 9 . 0 0 0.00 39:0 41.0 0.0 0.0 0:0 0:0 0100 0.00 1227:21 1190:36 1245.79 .1208.73 9.29 9.19 28 282.3 . . 9.19 08 9 . 0.0 0 0 0.00 0.00 43.0 45:0 47.:0 0.0 00 - 0:0 b.0 0.0 OA OAO 0:00 0.00 1153.93 1117:91 1082130 1172.09 1135.87 1100:06 9.08 8.98 8.88 282.2 282:1 282:1 81 9 . 8.98 $.88 75 8 . 0.0 OA 0.0 0.00 0.00 0.00 49.0 0:0 0.0 0.00 1047115 1064:65 8.75 . 2 81 . 61 8 0.0 0.00 51,0 0:0 0:0 0.00 1012.57 1029.79 . 8.61 :8 2 7 81 . 46 8 0.0 0.00 53:0 . 0;0 0.0 0.00 978.58 .995.51 8.46 . 2 1 6 . 32 8 0 0 .0.00 55.0 0:0 0.0 0.00 945.16 961.80 8.32 . 28 281 5 . 18 8 . 0.0 0.00 57:0 0:0 0:0 0.00 912.30 928.66 8.18 . 4 28 . 04 8 0 0 0.00 5910 61!0 0:0 0[0 0.0 D.0 0.00 0.00 879.98 848.21 896.07 864.03 8.04 7.91 1. 281.3 . 7.91 7g 7 . 0.0 0 0 0.00 0.00 63,0 Ol0 0.0 `0.00 816.97 ..832.52 7.78 281.2 1 1 . 71 7 . 0 0 0.00 64`0 0':0 0:0 0.00 801...54 816.97 7.71 : 28 . . . PEAK FLOWS 71 71 10 283.2 10 14 14 9703-dra.xls 0.00 indicates inital condition ~ Exhibit E-1 O W ~ ~ Z a O ~ d w N Q Q O O O d F- H O O O ~' // O O I lfj / "' 1 / N ~k /' °O o O ~ r ~ 1 ~ c ~ e- 1 ~ Q ~ j o a ~ N o L Q ~ 0 = . ~ • 0 ~ / 0 ~ Q ; ~ N d Z W / ~ W ~ ~ N ~ / o t t o a 0 \ ° ~ ~' 1 0 0 O o 0 0 o O O O O O O O O O O O o O o° O O O b .. ~ ~ M M N N ~ O t[') O (S1~) D OD N Cn O W ~ ±-. X W w ~ ~ z ~ a t= O ~ a w o O O a F ~ 0 0 0 v o 0 ! M '1 - ++ t ' ~ O = O ~ M m ° I a I to W s I t/~ ~ i N i a o _ > a , = ~ -- o ~ o = 0 a Z W ~ ~ W `' 2 ~ N ~ o o ~ { I 1 o ~ ° 0 ~ ~' 1 0 0 g a o 0 o S o 0 ~ ~ ~ C7 N O O ~S;~~ QO N ~ ~ o W ,... ~ ~ X W O W U, fA Z H O ~ a w o O o o. r t- 1 0 0 0 o 0 u ' M J' C ~ O ' c~ co a ~ ~ N ~ ~ ~ I L 2 N ~ ~ • ~ + ~ J _ _ ~ ~ ~ _ ~ a ~ 0 N Z W ~ ~ W ~ ~ ~' ~ N o ~ o ~ - 0 t °o \`~ ~ u~ 0 0 o° °o °o °o °o °o o° (~q ll~ V M N O O r ~~~~ ~} 00 N ~ ' O W ~ ~"' CO X W w ~ O a Z O F= ~ a w F 0 o O d F- h- 1 0 0 0 v o 0 M ~ O 1 ° C ~ O , th ~ o a i N s ! ~ ~ ~ o L t1') 2 ~ ! N a ~ ~ ~ a , = l ~ o ~ I o t Z ; N d Z LJ.I ~ _ ~ r ~ ~ r o o r 1 c ~ o 0 ~ o ~ o ~ "' 0 0 0 0 0 0 0 0 0 0 0 Or ~ t~C' V M N O O {~~? b d0 N O W _ ~_ ~~ x W D W U, (~ Z O - ti ~ ~ X ~ W N Q Q ~ ~ ~ o O O a -- t- 1 0 0 0 v o o M y~ TI. ' ~ 0 ~ ' ~ ° 1 a ~ s ~ w ~. 1 L 1 O 0 t 1 N Q. L ~ ' Q T 2 '~ 0 Q {.~ _ / i O C .~ Z ~ N d z W ' t- W ' ~ N O ~ ~ ~ ~ t ~ 1 ~ o ~ o 0 ~ o ~, 0 S S o S S o 0 0 0 ~ ~ (O lA V M N ~ ~ ~5;~~ 00 N O LLI a-. ~ ~ co W