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WPO201400097 Calculations 2015-04-03
Northridge Medical Center ALBEMARLE COUNTY, VIRGINIA MINOR SITE PLAN AMENDMENT DESIGN CALCULATIONS & NARRATIVE NOVEMBER 21, 2014 REVISED: APRIL 3, 2015 . '"**sip • , TIMMONS GROUP Prepared by: Craig Kotarski, PE Timmons Group 919 2nd Street S.E. Charlottesville, VA 22901 434.327.1688 ,71' {: Y r cR mri KO'ARSKI> Lic,No.0402O43507 . 4/3/15 —i ONAL APPROVED by the Albemarle County Community De elo•ment Department Date S 13 i File A '.,:_ 'a Table of Contents Section Title 1 Narrative 2 Stormwater Quantity Calculations 3 VDOT Form LD229 4 Virginia Runoff Reduction Method ReDevelopment Worksheet 5 Pre-Developed HydroCAD Calculations 6 Post-Developed HydroCAD Calculations 7 Biofilter Routing Project Narrative: This project involves an addition to an existing medical office building. Additionally the circulation up to the buildings entrance is being changed, which will require the relocation of 6 ADA spaces. The Limits of Disturbance for the project are 0.74 acres. 0.26 acres of this area is in the front of the existing building and will be used as a laydown area. The land cover condition of this area will not be modified in the post construction condition and shall be ignored from all quantity/quality calculations. The land cover condition of the 0.48 acres in the back of the building will be modified in the post condition and is thus referred to as the modified area used to for water quantity/quality calculations. Water Quality: Currently there exists 0.12 acres of manage turf and 0.36 acres of impervious cover within the limits of disturbance. In the proposed condition there will be 0.14 acres of managed turf and 0.34 acres of impervious cover. Per the Virginia Runoff Reduction Redevelopement Spreadsheet,this will require that 0.05 lbs/yr of phosphorous be removed. A biofilter is being installed to meet the required reduction. The biofilter is sized to treat 0.06 acres of impervious cover and 0.02 acres of managed turf This will provide 0.08 lb/yr of removal meeting the required reduction. Water Quantity: Channel and Flood Protection requirements are being satisfied through an overall reduction in impervious area as well as volume reductions from the biofilter. The energy balance equation was used to demonstrate channel protection compliance and is shown on the following page. Flood protection compliance is based on the fact that the Post- Developed 10 year flow is less than the Pre Developed 10 year flow. It should be noted that the CN value of 86 used in the post developed HydroCAD calculations was taken from the runoff reduction spreadsheet. Stormwater Quantity Calculations: Channel Protection: Energy Balance Equation: < (QPre–developed * RVPre–developed) 1 QDevlopea — F * /RVDeveloped Where: I.F. =Improvement Factor(0.9 for sites<1 acre) QDeveloped=Allowable Peak flow rate from developed site RVDevelopea=Runoff volume from the developed site QPre-developed=Peak flow rate from the pre-developed site RVPre-developed=Runoff volume from the pre-developed site Site Area: = 1.45cfs S 0.9 * (1.63cfs * 0.077acft) — 1.65c s QDeveloped — f I(0.0684ac f t) f Flood Protection: Post — Developed Q10 <_ Pre — Developed Q10 3.30cfs <_ 3.49cfs *Flows and Volumes used in the Channel and Flood Protection calculations were det-twined using HydroCAD. The CN value of 86 used in the Post-Developed calculations was taken from the Channel and Flood Protection tab of the Runoff Reduction Spread Sheet. J \ ()k �k X = S» g \ k v/ \ \ — / r 00 5. . D <T. / 2 a 0 . . k \5` -: .. / ) \ E\ \ 13 ! ]% ) ) =a # )}}=± _ \ §� / (\ `' � wl co # > -4 \ -vi W1 14 0 f6 w °§ \ { 2 ! ! k \) / u .7 )\ § §± . f G uQI- 0 z §\\ } ) ® ! F,§ ! |r & ) »w'' - \2 g¥ } ® f £ § ; f C) () b E 0 'a-6 Cl, co fn K '2 ° ) �/ « 0 c4 § u § e n 3 § y a `ca W 0 0. e ELI fp ) - s §0 2 W. § n � ^ § Virginia Runoff Reduction Method ReDevelopment Worksheet v2.7 Revised April 2013 Site Data Project Name:Northridge Medical Center I '- -'-' Date:21912015 + - I _. .__ ..--- data input cells I -_- -_ calculation cells - --� - +--- - --�" `- -- f..- -_- constant values ( -4-- __..._ __- f oP Project I- -t- -- r.__. Post-ReDevel ment Project&Land Cover Information Total Disturbed Acr.ge - Annual Rainfall(inches) F.___. ..._.__ __�._-. Target Rainfall Event(inches) 111111111.3111111 _ - --- - 4--- ----- Phosphorus EMC(mg/L) --_ _-- N EMC 1.58 I _ Target Phosphorus Target Load(lb/acre/yr) • Nitrogen SQL) --'}- I 1 it 0.90 _ - __Prs-ReDswlopment Land Cover(acres) y - A soils B Soils C Soils D Soils Totals - -`-- Forest/Open Space(acres)-undisturbed, �"-" - l -Y -( -- protected forest/open space or reforested land G 00 t 05 I 090 I 000 C Managed Turf(acres)-disturbed,graded for ���+v awa�a-=�;°'�'? � -"-"i�"--- ---"i--- yards or other turf to be mowed/managed .`G I 0 00 I D 11 Impervious Cover(acres) .r.,„.. -.-----------------__.. . - J Total 0 Post-ReDevelopment Land Cover(acres) .aa •. i.. r Soils _ 'Totals ...._ 7 Forest/Open Space(acres) undisturbed, T, protected forest/open space or reforested land Managed Turf(acres) disturbed,graded for r L 0 t - yards or other turf to be mowed/managed 0 14 T Impervious Cover(acres) :,N- 034 , ----- Total L a.aA....,. __. ___ __. Area Check - - "' . Okay Okay Okay Okay Rv Coefficients _____ 1_. _-_.. ._._ -.___ _ .T_ A soils B Soils C Soils D Soils �_ f ... _-_ ._..__ .-.____ r. Forest/Open Space 0.02 0.03 0.04 0.05 Managed Turf 0.15 0.20 0.22 0.25 ■ _ Impervious Cover 0.95 0.95 _ 0.95 0.95 1 Land Cover Summary Listed Adjusted' Land Cover Summary -Land Cover Summary_ Pre-ReDevelopment _ P Post-ReDevelopment i pps(-Mpwrabprant limy lmgaryiga forest/Open Space Forest/Open Space Cover(acres) 0.00 0 Cover acres 0.00 C Composite Rv(forest) 8 00. __000. 0.00 %Foreffi 0% 0% Managed Turf Cover(acres) 0.12 0.12 Composite Rv(turf) 0.20, ---- 0- 0.14 �I -- 0.20 } - ._ % ed Turf - _..-. ...._ Mana9 - 25% T 29% , ReDev.Impervious Impervious Cover(acres) p.36 • ___ Cover acres 0 34 New lm•=rvious Cover acres; Rv(impervious) 0.95 _,_ --l�l ' 0.95 Rv im rviow, of %Impervious 75% 1 -....._. 71% �, %I ., -MarillIM.. Total Rate'.Site 1 Total Site Area(acres) p es) _- 0.48 048 Area acres 0.48 Total New Dee.Site Area - Site Rv -_�0.76... 0.76 R.Day.Site Rv 0.73 New Dev.Site "< Omµ- Poe- . ReOevelopmerm Treatment Volume Post-Development T Pre-Development Treatment Volume(acre-fl) 00305 00305 acre-R 0.0293 Volume( 0.0000 Post ReDevelopment Pre-Development Treatment Volume(cubic Treatment Volume I Post-Development Treatment' t 1,329 1,329 cubic feet 1274 Volume(affirc feet). 0 ReDevelopment Pre-Development Load(TP)(Ib/yr) 0.83_ 0.83 Load(TP)(tb/yr) 080 Post-Development Load(TP)(Ib/yr) 0.00 'Adjusted Land Cover Summary reflects the pm redevelopment Maximum%Reduction Required land cover minus the pervious land cover foresto n p e ( us space or Pre-ReDevelopment Load 10 managed turf)acreage proposed for new impervious cover.The adjusted total acreage is consistent with the Post Redevelopment TP Load Reduction Required for i To Load Reduction Required for[ acreage(minus the acreage of new impervious cover).The load reduction requriement for the new impervious cover to meet the new Redeveloped Area(Iblyr) 0 05 New Impervious Area(Ibtyr) 0.00 development load limit is computed in Column I. Total Load Reduction Required i (Ib/yr) 0.05 •re-ievelnpmen oad ` Vyr `. 1 Post-Development Load(TN)(Ib/yr)i 731 W 3 F3 1 E E OM 3 0 o a n 01 d c 1t n ': a E rc°;a I I r o o 8 S o �gm „ 0 a 1 0o o a;" j I f I I ; i $+ o _ 0 8 °I °I a o °E , o I c o. t oI 0o E 0! a c 1 a 01 0 0 0 t� o � o 1 gu+ i v °f"0) I o o 1 e f , o o „ o N n ry > s°"ff 1 m `c°c { o a rs oI A a I� i q a o o of i 0 o o oI 01 o a °� 01 o i o a o a V c v m { I 1 o I I O o rc m 1 I i t • = E• , 07 o o� � o ni a o o o o 03 0 3 o • E y ■ I D >>• a I — 1( W I j a rsI'I .1 e °o i 8) 2 ,1 ai mI O CJ m a � F I ZO ai olala o o C o 0 o I 0 O o 0 0 0 0 0 oi I i ' q > 3 0 E 0 m m m j -1 > g . a E v E v E a E a E m e m .-§ E Ti, °g 4 1 -1 IN ,,u C 8 3` 3 E 4E 3. 4E E 9 0 5-2 o> 3` E E E E E E to co ri c' s .. o E tog om ;1 p t o 0 0 O ©10 m o m e � a' gg X3 2e° .� t,71-1 e c g N� o of_ • $ $ a m o �.a v ,5 5 o o 5 5 a a a a "W; m v� m m m m 2m' m @ a o 80 3 m ° Sm I c c c c c ;, Q _ _ _ m "_l iii ;1° e 8 3 3 3 3 8 cQ i0 z m m - v a o a v a @ a 9o8 a m_ a v 7. 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N N U U- o U m_m m _ a a LL o,g o,g n N N o m m m .1 3' 0 3 .m 0 ,y Z r -'m m G A O O m m w m 0 L c m o E 9 m N- m c n_ n N m O m N f ii 8 E 1 1 t x � i E i I 1 6 O O O 1Ff 0 4 �� 61 O O� of 0I 0 0 0 - S 8 0 8 8 8C 8 oj 8 8 8 81 8 8 o of o. i o � 1 a 1 - . 0 0 8 0 1�E 01 o g 0� o 0 8 0- � 1 0 0 01 0 o 0 g 01 0 0 o 71 !a t 1 1 1 1 a 81 1 a.Jrca 0 8 8 88 3 4 $ 88 0 0 of o a k 0, o 0 0 to K rc C 1 I 4 0! I T0 01 O� Q d cS� c'i OI O j R O C� O� O� .� I 0� 0 1 0i �� wee ( i I I 8I a z S 8 8 8 01 0 8, 8 8 8 8 81 og� o a i ` E u 7 ` 1 I 0 1 T2 a • 3 y O @ > U 110 011 1111 Hililim I 111 111111 1111 11111111 11 m 0 7 n .,, c - m a 0 E n N. N u u c v a a 0 to U m < Ii. m _ N 0 O m m a w U< U U m_ f y m a a a a a° 15 E4 To a a m a m y e.3 y Q a. � I � II I , iII ii ' II I II i 1 IL i 't I 1 1 1 Ili ii . II I 1 I1I I � f � l i . 11 ; 1 II jr , I1 I! ' ' � �r; lf ' I , 1 jI I j I !43 y '':!_>.- i 0 a :zi•; :F z ' 11 1,1' i '3i 2 U 3!z I I ILL.O U W w0 CN, a a.2 W i. o_f___ J W W O m2 O 2 O O' i 2d F z 4 E,1 2, - W Or K 0 p 0 W WI H; 'a i OF 2 S co ff,II Ni K W a e4; > J n 0- Iti gI'' > O > O U O' j W F O N a 2 0 Q 8, = Q' K W - I i =Q W 1 111 ' 111w 1 , f I I Y) i � it 1 It1 ire , , 11 i 1 i i I I ( I I j i i 1 i1 ' I I U 0 Y Y Y Y j I j I I ( 1 1 < 0 0 0 0 j I Ce Q I Ifi ( II I iI ■ 1W 1 1 Y 1I ! 0 j I i _ • j I D °I I I o j I I I I m o I I = I I ❑ j W V Y I I I I I I O I ! i W, I I 2 — ~. j + p'. i m I i ; j w f ,� Y I i I X I I ■ii,*url I ! jI j .,Y !0 f ICI , III _ I ' 4 i °I I ! 1 _ z ` Q:❑Q❑Y a I ^ >W W W W Q V W U T O Q Q Q= W Z m - w Z m a 0i-0 W I U❑ t- U❑ {V ore'-<� ❑ ❑> ❑ f j vw ! 0 < ! W a'2 0 -J ! , 1 W 0 0 0 n."W �' i o W Q Co Z ”L'L Q Z 0 1 Z0 0 I- 200 0 3, rl O K V O a i ! �V 2 w U C a ❑ . z lj W ❑ d Q IA W I I ; D' < ° 1 N Q Z I I I < 0 W a 0 0 O fn 3 Z W ! ! j 1 N 0 0 0 O. 0 W j I w C O a 0 0' F j I W y ! G I- Co I 0 N 0 0 ■ tC Z 00 1 I a 0 r = 1�' 1 j ❑ Co I co a 0 l j l a 0 z Co 7 CA I Co D I Co Q ❑- Q p a 0 O 0 w I Q d) 0 Co I- - c N cc t K C) Co Q �. r I = O Cl) a Z 1-year storm 12 ear storm 10-year storm Target Rainfall Event(in) i ,,,- 3 68 'x' yracS7 1 -.._ r ----..--.-._-.. Drainage Area A ' Drainage Area(acres) (� Runoff Reduction Volume(cf) 7-' t r Drainage Area B -------- ' _____ Drainage Area(acres) 0 00 Runoff Reduction Volume(cf) 0 ±- --- Drainage Area C Drainage Area(acres) 1 0 00 _ -- ----- -1 --- Runoff Reduction Volume c t _ -r 1--_------ ----..___------ ------ ---- ---------------�-'-- Drainage Area D t t - -f- Drainage Area(acres) 0.0 L Runoff Reduction Volume(cf) 0 _-- --_-_ ------ - - - ---- -- Drainage Area E Drainage Area(acres) Runoff Reduction Volume(cf) (, - ---- ----- -- --- 1 --- �-_-. -� --- 1 --- -I--- -- Based on the use of Runoff Red Ilion in the eele(fed drainage __ practice* rage areas,the spreadsheet calculates an adjusted RVo,,,,,,p,d and adjusted Curve Number. I Drainage Area A A soils B Soils C Soils 0 ••Is Forest/Open Space--undisturbed,protected forest/open Area(acres) 0.00 0.00 space or reforested land CN 30 _ 55 70 77 Managed Turf--disturbed,graded for yards or other turf to be Area(acres) q.. 0 0.14 0.00 0-00 mowed/managed CN 39 61 74 80 Area(acres) 0.00 0,04 0.00 0.00 _ Impervious Cover CN 98 98 98 98 Weighted CN S .. ) 87 1-year storm 2-year storm 10-year storm RV,,...„,„,„,„,,(in)with no Runoff Reduction. 1.77 2 34 , "4.11 RVo,,,,,,,d(in)with Runoff Reduction 1.72 2.29 4 05 I Adjusted CN 86 86 86 7 Drainage Area B A soils I B Soils C Soils D Soils i Forest/Open Space--undisturbed,protected forest/open Area(acres) 0.00 000 0.00 0.00 __ space or reforested land CN 30 55 70 77 Managed Turf--disturbed,graded for yards or other turf to be Area(acres) 0 00 0.00 0.00 0.00 mowed/managed CN 39 61 74 80 Impervious Cover Area(acres) 0,00 0.00 0.00 0.00 CN 98 _ 98 98 98 Weighted CN S , i 0 [ 1000.00 1-year storm 2-year storm 10-year storm RVo,,,,,,,d(in)with no Runoff Reduction 0.00 i 0.00 1 0.00 RV0,,,4,,,,,(in)with Runoff Reduction, 0 00 { 0.00 0.00 Adjusted CN L #NJA _-y( #N/A A.- #N/A Drainage Area C A soils B Soils C Soils D Soils Forest/Open Space-undisturbed,protected forest/open Area(acres) 0.00 0.00 0 00 000 space or reforested and CN 30 55 70 77 Managed Turf--disturbed,graded for yards or other turf to be Area(acres) 0.00 0 00 0 JO 0.00 mowed/managed ON 39 61 74 80 Area(acres) 0,00 0.00 :,'.O(1 0.00 Impervious Cover N 98 98 98 98 -... . _..- -- ppWeighted CN S L- 0 1000.00 1-year storm 2-year storm 10-year storm RV5,,,,,,,d(in)with no Runoff Reduction) 0 001 0.00 0.00 RV,,,,.,,,,d(in)with Runoff Reductions 0.00( 0.00 0 00 Adjusted CN i #N/A t #N/A #N/A Drainage Area D A soils B Soils C Soils D Soils Forest/Open Space--undisturbed,protected forest/open Area(acres) 090 0.00 0.00 0.00 space or reforested land ON 30 55 70 77 - - Managed Turf-disturbed,graded for yards or other turf to be Area(acres) 0.00 0.00 0.00 0.00 __ mowed/managed N 39 61 74 80 Area(acres) 000 -90 2 JO 0.00 Impervious Cover CN 98 98 98 98 Weighted CN S 0 ( 1000.00 1-year storm 2-year storm 10-year storm RVo,N,,,d(in)with no Runoff Reduction 0 00 i 0.00 0 RVo,,,,,,p,d(in)with Runoff Reduction 0.00 0 00 Adjusted CN #N/A #N/A #N/A Drainage Area E A soils B Soils C Soils D Soils Forest/Open Space--undisturbed,protected forest/open I Area(acres) 0.00 0.00 0.00 0.00 space or reforested land CN 30 55 70 77 -- Managed Turf--disturbed,graded for yards or other turf to be Area(acres) 0.00 0.00 0 00 0.00 mowed/managed CN 39 61 74 80 Area(acres) 0.00 0.00 0.00 0.00 Impervious Cover N _ 98 98 98 98 Weighted CN S j 0 I 1000.00 _ r 1-year storm 2-year storm 10-year storm RVp,�, a(in)with no Runoff Reduction? 0.00 0 00 "' "'"11.00 RVp.„*"(in)with Runoff Reduction] 0.00 0 00( 0.00 Adjusted CN L� #NA____` #NIA #N/A Virginia Runoff Reduction Method Worksheet Virginia Runoff Reduction Method ReDevelopment Worksheet v2.7 Revised April 2013 Site Data Summary Total Rainfall=43 inches Site Land Cover Summary A Soils B Soils C Soils D Soils Total %of Total Forest(acres) 0.00 0.00 0.00 0.00 0.00 0.00 Turf(acres) 0.00 0.14 0.00 0.00 0.14 29.17 Impervious(acres) 0.00 0.34_ 0.00 0.00 0.34 70.83 0.48 100.00 Site Rv 0.73 Post Development Treatment Volume(ft3) 1274 Post Development TP Load(lb/yr) 0.80 Post Development TN Load(Ib/yr) 5.73 Total TP Load Reduction Required(Ib/yr) 0.05 Total Runoff Volume Reduction(ft3) 95 Total TP Load Reduction Achieved(Ib/yr) 0 Total TN Load Reduction Achieved(Ib/yr) 0.68 Adjusted Post Development TP Load(Ib/yr) 0.72 Remaining Phosphorous Load Reduction(Lb/yr)Required QQ(I Drainage Area Summary D.A.A D.A.B D.A.C D.A.D D.A.E Total Forest(acres) 0.00 0.00 0.00 0.00 0.00 0.00 Turf(acres) 0.14 0.00 0.00 0.00 0.00 0.14 Impervious(acres) 0.34 0.00 0.00 0.00 0.00 0.34 0.48 Drainage Area Compliance Summary D.A.A D.A.B D.A.C D.A.D D.A.E Total TP Load Red.(lb/yr) 0.08 0.00 0.00 0.00 0.00 0.08 TN Load Red.(Ib/yr) 0.68 0.00 0.00 0.00 0.00 0.68 Summary Print Virginia Runoff Reduction Method Worksheet Drainage Area A Summary Land Cover Summary A Soils B Soils C Soils D Soils Total %of Total Forest(acres) 0.00 0.00 0.00 0.00 0.00 0.00 Turf(acres) 0.00 0.14 0.00 0.00 0.14 29.17 Impervious(acres) 0.00_ 0.34 0.00 0.00 0.34 70.83 0.48 BMP Selections Practice Credit Area(acres) Downstream Practice 6.a.Bioretention#1 or Urban Bioretention(Spec#9) Impervious: 0.064 Turf(Pervious): 0.023 Total Impervious Cover Treated(acres) 0.06 Total Turf Area Treated(acres) 0.02 Total TP Load Reduction Achieved in D.A.A(Ib/yr) 0.08 Total TN Load Reduction Achieved in D.A.A(Ib/yr) 0.68 Summary Print Virginia Runoff Reduction Method Worksheet Channel and Flood Protection Weighted CN 1-year 2-year storm 10-year storm Adjusted CN storm Adjusted Adjusted CN CN Target Rainfall Event(in) 3.04 3.68 5.57 D.A.A CN 87 86 86 86 D.A.B CN 0 #N/A #N/A #N/A D.A.C CN 0 #N/A #N/A #N/A D.A.D CN 0 #N/A #N/A #N/A D.A.E CN 0 #N/A #N/A #N/A Summary Print Pre Developed Subcat Reach -on. Routing Diagram for PRE Prepared by Microsoft, Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC PRE Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.120 61 >75%Grass cover, Good, HSG B (1S) 0.360 98 Paved parking, HSG B (1S) 0.480 89 TOTAL AREA PRE Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.480 HSG B 1S 0.000 HSG C 0.000 HSG D 0.000 Other 0.480 TOTAL AREA PRE Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 4 Ground Covers(all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.120 0.000 0.000 0.000 0.120 >75%Grass cover, Good 1S 0.000 0.360 0.000 0.000 0.000 0.360 Paved parking 1S 0.000 0.480 0.000 0.000 0.000 0.480 TOTAL AREA PRE Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD® 10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 5 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 Subcatchment 1S: Pre Developed Runoff Area=0.480 ac 75.00% Impervious Runoff Depth>1.93" Tc=5.0 min CN=89 Runoff=1.63 cfs 0.077 af Total Runoff Area=0.480 ac Runoff Volume=0.077 af Average Runoff Depth=1.93" 25.00%Pervious=0.120 ac 75.00%Impervious=0.360 ac PRE Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 sin 06538 ©2013 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 1S: Pre Developed [49] Hint: Tc<2dt may require smaller dt Runoff = 1.63 cfs @ 11.95 hrs, Volume= 0.077 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 1-Year Rainfall=3.04" Area (ac) CN Description 0.360' 98 Paved parking, HSG B 0.120 61 >75%Grass cover, Good, HSG B 0.480 89 Weighted Average 0.120 25.00% Pervious Area 0.360 75.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: Pre Developed Hydrograph ❑Runoff 1163d81 Type II 24-hr 1-Year Rainfa11=-3.04" Runoff Area=0.480 ac Runoff V o I ti me 0.4 7'r af Runoff Depth>1.93" Tc=5.0 min GN=89 0 AL 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) PRE Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 1S: Pre Developed Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 2.35 1.32 0.08 0.25 0.01 0.00 0.00 13.25 2.39 1.36 0.07 0.50 0.02 0.00 0.00 13.50 2.43 1.39 0.06 0.75 0.02 0.00 0.00 13.75 2.46 1.42 0.06 1.00 0.03 0.00 0.00 14.00 2.49 1.45 0.05 1.25 0.04 0.00 0.00 14.25 2.52 1.47 0.05 1.50 0.05 0.00 0.00 14.50 2.55 1.50 0.04 1.75 0.06 0.00 0.00 14.75 2.57 1.52 0.04 2.00 0.07 0.00 0.00 15.00 2.59 1.54 0.04 2.25 0.08 0.00 0.00 15.25 2.62 1.56 0.04 2.50 0.09 0.00 0.00 15.50 2.64 1.58 0.04 2.75 0.10 0.00 0.00 15.75 2.66 1.59 0.03 3.00 0.10 0.00 0.00 16.00 2.68 1.61 0.03 3.25 0.11 0.00 0.00 16.25 2.69 1.62 0.03 3.50 0.13 0.00 0.00 16.50 2.71 1.64 0.03 3.75 0.14 0.00 0.00 16.75 2.73 1.65 0.03 4.00 0.15 0.00 0.00 17.00 2.74 1.67 0.03 4.25 0.16 0.00 0.00 17.25 2.76 1.68 0.03 4.50 0.17 0.00 0.00 17.50 2.77 1.69 0.03 4.75 0.18 0.00 0.00 17.75 2.79 1.71 0.02 5.00 0.19 0.00 0.00 18.00 2.80 1.72 0.02 5.25 0.20 0.00 0.00 18.25 2.81 1.73 0.02 5.50 0.22 0.00 0.00 18.50 2.83 1.74 0.02 5.75 0.23 0.00 0.00 18.75 2.84 1.75 0.02 6.00 0.24 0.00 0.00 19.00 2.85 1.77 0.02 6.25 0.26 0.00 0.00 19.25 2.86 1.78 0.02 6.50 0.27 0.00 0.00 19.50 2.87 1.79 0.02 6.75 0.29 0.00 0.00 19.75 2.88 1.80 0.02 7.00 0.30 0.00 0.00 20.00 2.89 1.80 0.02 7.25 0.32 0.00 0.00 20.25 2.90 1.81 0.02 7.50 0.33 0.01 0.00 20.50 2.91 1.82 0.02 7.75 0.35 0.01 0.00 20.75 2.92 1.83 0.02 8.00 0.36 0.01 0.01 21.00 2.93 1.84 0.02 8.25 0.38 0.01 0.01 21.25 2.94 1.85 0.02 8.50 0.40 0.02 0.01 21.50 2.95 1.86 0.02 8.75 0.42 0.02 0.01 21.75 2.96 1.86 0.02 9.00 0.45 0.03 0.01 22.00 2.97 1.87 0.02 9.25 0.47 0.03 0.01 22.25 2.98 1.88 0.02 9.50 0.50 0.04 0.01 22.50 2.99 1.89 0.02 9.75 0.52 0.05 0.02 22.75 3.00 1.90 0.02 10.00 0.55 0.06 0.02 23.00 3.01 1.91 0.02 10.25 0.58 0.07 0.02 23.25 3.01 1.91 0.02 10.50 0.62 0.09 0.03 23.50 3.02 1.92 0.02 10.75 0.66 0.10 0.04 23.75 3.03 1.93 0.01 11.00 0.71 0.13 0.05 24.00 3.04 1.94 0.01 11.25 0.78 0.16 0.07 11.50 0.86 0.20 0.09 11.75 1.18 0.40 0.49 12.00 2.02 1.04 1.40 12.25 2.15 1.15 0.20 12.50 2.23 1.23 0.13 12.75 2.30 1.28 0.10 PRE Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 8 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 Subcatchment 1S: Pre Developed Runoff Area=0.480 ac 75.00% Impervious Runoff Depth>2.52" Tc=5.0 min CN=89 Runoff=2.10 cfs 0.101 of Total Runoff Area=0.480 ac Runoff Volume=0.101 of Average Runoff Depth=2.52" 25.00%Pervious=0.120 ac 75.00%Impervious=0.360 ac PRE Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 1S: Pre Developed [49] Hint: Tc<2dt may require smaller dt Runoff = 2.10 cfs @ 11.95 hrs, Volume= 0.101 af, Depth> 2.52" 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-Year Rainfall=3.68" Area (ac) CN Description 0.360 98 Paved parking, HSG B 0.120 61 >75% Grass cover, Good, HSG B 0.480 89 Weighted Average 0.120 25.00% Pervious Area 0.360 75.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: Pre Developed Hydrograph ❑Runoff kiocis 2- , _ gyp It 2441r 2•Year Rainfall=3.68" Runoff Area=0.480 ac Runoff Vbltimae*,0.1011 af f Runoff Depth>2.52" 1,- �'c=5:0 mTn CN=89 0rf�f/��i.,r/!//���/O'./. "r,�r./�1..///l./,1.,'rr/-'.�r.,,s',f./rr,.f.•.��.1�./1/./..fr1.�Ir1.r".�,�,�.,frf/�,/.����/% 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) PRE Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 10 Hydrograph for Subcatchment 1S: Pre Developed Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 2.84 1.76 0.10 0.25 0.01 0.00 0.00 13.25 2.89 1.80 0.09 0.50 0.02 0.00 0.00 13.50 2.94 1.85 0.08 0.75 0.03 0.00 0.00 13.75 2.98 1.88 0.07 1.00 0.04 0.00 0.00 14.00 3.02 1.92 0.06 1.25 0.05 0.00 0.00 14.25 3.05 1.95 0.06 1.50 0.06 0.00 0.00 14.50 3.08 1.97 0.06 1.75 0.07 0.00 0.00 14.75 3.11 2.00 0.05 2.00 0.08 0.00 0.00 15.00 3.14 2.03 0.05 2.25 0.09 0.00 0.00 15.25 3.17 2.05 0.05 2.50 0.10 0.00 0.00 15.50 3.19 2.08 0.04 2.75 0.12 0.00 0.00 15.75 3.22 2.10 0.04 3.00 0.13 0.00 0.00 16.00 3.24 2.12 0.04 3.25 0.14 0.00 0.00 16.25 3.26 2.14 0.04 3.50 0.15 0.00 0.00 16.50 3.28 2.15 0.04 3.75 0.16 0.00 0.00 16.75 3.30 2.17 0.03 4.00 0.18 0.00 0.00 17.00 3.32 2.19 0.03 4.25 0.19 0.00 0.00 17.25 3.34 2.21 0.03 4.50 0.20 0.00 0.00 17.50 3.36 2.22 0.03 4.75 0.22 0.00 0.00 17.75 3.37 2.24 0.03 5.00 0.23 0.00 0.00 18.00 3.39 2.26 0.03 5.25 0.25 0.00 0.00 18.25 3.41 2.27 0.03 5.50 0.26 0.00 0.00 18.50 3.42 2.28 0.03 5.75 0.28 0.00 0.00 18.75 3.44 2.30 0.03 6.00 0.29 0.00 0.00 19.00 3.45 2.31 0.03 6.25 0.31 0.00 0.00 19.25 3.46 2.32 0.02 6.50 0.33 0.01 0.00 19.50 3.48 2.34 0.02 6.75 0.35 0.01 0.00 19.75 3.49 2.35 0.02 7.00 0.36 0.01 0.01 20.00 3.50 2.36 0.02 7.25 0.38 0.01 0.01 20.25 3.52 2.37 0.02 7.50 0.40 0.02 0.01 20.50 3.53 2.38 0.02 7.75 0.42 0.02 0.01 20.75 3.54 2.39 0.02 8.00 0.44 0.03 0.01 21.00 3.55 2.40 0.02 8.25 0.46 0.03 0.01 21.25 3.56 2.41 0.02 8.50 0.49 0.04 0.01 21.50 3.57 2.42 0.02 8.75 0.51 0.05 0.02 21.75 3.58 2.44 0.02 9.00 0.54 0.06 0.02 22.00 3.60 2.45 0.02 9.25 0.57 0.07 0.02 22.25 3.61 2.46 0.02 9.50 0.60 0.08 0.02 22.50 3.62 2.47 0.02 9.75 0.63 0.09 0.03 22.75 3.63 2.48 0.02 10.00 0.67 0.11 0.03 23.00 3.64 2.49 0.02 10.25 0.71 0.12 0.04 23.25 3.65 2.50 0.02 10.50 0.75 0.15 0.04 23.50 3.66 2.51 0.02 10.75 0.80 0.17 0.05 23.75 3.67 2.51 0.02 11.00 0.86 0.21 0.07 24.00 3.68 2.52 0.02 11.25 0.94 0.25 0.09 11.50 1.04 0.31 0.12 11.75 1.42 0.57 0.66 12.00 2.44 1.40 1.80 12.25 2.60 1.54 0.25 12.50 2.70 1.64 0.17 12.75 2.78 1.70 0.12 PRE Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pape 11 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 Subcatchment 1S: Pre Developed Runoff Area=0.480 ac 75.00% Impervious Runoff Depth>4.32" Tc=5.0 min CN=89 Runoff=3.49 cfs 0.173 of Total Runoff Area=0.480 ac Runoff Volume=0.173 of Average Runoff Depth =4.32" 25.00%Pervious=0.120 ac 75.00%Impervious=0.360 ac PRE Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment 1S: Pre Developed [49] Hint: Tc<2dt may require smaller dt Runoff = 3.49 cfs @ 11.95 hrs, Volume= 0.173 af, Depth> 4.32" 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-Year Rainfall=5.57" Area (ac) CN Description 0.360 98 Paved parking, HSG B 0.120 61 >75%Grass cover, Good, HSG B 0.480 89 Weighted Average 0.120 25.00% Pervious Area 0.360 75.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 'IS: Pre Developed Hydrograph ❑Runoff - {349cis J Type 1124-hr -- -0-,Year ai f-'t14:5-57 `--- Runoff Area=0.480 ac Runoff VoIume0.173 a1f 2-f Runoff�krph4: 2"' ° - Tc=5.0 min LL CN=89 1. 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) PRE Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pace 13 Hydrograph for Subcatchment 1S: Pre Developed Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 4.30 3.11 0.17 0.25 0.01 0.00 0.00 13.25 4.38 3.18 0.14 0.50 0.03 0.00 0.00 13.50 4.45 3.25 0.13 0.75 0.04 0.00 0.00 13.75 4.51 3.31 0.11 1.00 0.06 0.00 0.00 14.00 4.57 3.36 0.10 1.25 0.07 0.00 0.00 14.25 4.62 3.41 0.09 1.50 0.09 0.00 0.00 14.50 4.67 3.45 0.09 1.75 0.11 0.00 0.00 14.75 4.71 3.50 0.08 2.00 0.12 0.00 0.00 15.00 4.75 3.54 0.08 2.25 0.14 0.00 0.00 15.25 4.79 3.58 0.07 2.50 0.16 0.00 0.00 15.50 4.83 3.61 0.07 2.75 0.17 0.00 0.00 15.75 4.87 3.65 0.07 3.00 0.19 0.00 0.00 16.00 4.90 3.68 0.06 3.25 0.21 0.00 0.00 16.25 4.93 3.71 0.06 3.50 0.23 0.00 0.00 16.50 4.96 3.74 0.06 3.75 0.25 0.00 0.00 16.75 4.99 3.77 0.06 4.00 0.27 0.00 0.00 17.00 5.02 3.79 0.05 4.25 0.29 0.00 0.00 17.25 5.05 3.82 0.05 4.50 0.31 0.00 0.00 17.50 5.08 3.85 0.05 4.75 0.33 0.01 0.00 17.75 5.10 3.87 0.05 5.00 0.35 0.01 0.01 18.00 5.13 3.90 0.05 5.25 0.37 0.01 0.01 18.25 5.15 3.92 0.05 5.50 0.40 0.02 0.01 18.50 5.18 3.94 0.04 5.75 0.42 0.02 0.01 18.75 5.20 3.96 0.04 6.00 0.45 0.03 0.01 19.00 5.22 3.99 0.04 6.25 0.47 0.03 0.01 19.25 5.24 4.01 0.04 6.50 0.50 0.04 0.02 19.50 5.26 4.03 0.04 6.75 0.52 0.05 0.02 19.75 5.28 4.04 0.04 7.00 0.55 0.06 0.02 20.00 5.30 4.06 0.03 7.25 0.58 0.07 0.02 20.25 5.32 4.08 0.03 7.50 0.61 0.08 0.02 20.50 5.34 4.10 0.03 7.75 0.64 0.09 0.02 20.75 5.36 4.11 0.03 8.00 0.67 0.11 0.03 21.00 5.37 4.13 0.03 8.25 0.70 0.12 0.03 21.25 5.39 4.15 0.03 8.50 0.74 0.14 0.03 21.50 5.41 4.16 0.03 8.75 0.78 0.16 0.04 21.75 5.43 4.18 0.03 9.00 0.82 0.18 0.04 22.00 5.44 4.20 0.03 9.25 0.86 0.20 0.05 22.25 5.46 4.21 0.03 9.50 0.91 0.23 0.05 22.50 5.47 4.23 0.03 9.75 0.96 0.26 0.06 22.75 5.49 4.24 0.03 10.00 1.01 0.29 0.06 23.00 5.51 4.26 0.03 10.25 1.07 0.33 0.08 23.25 5.52 4.27 0.03 10.50 1.14 0.37 0.09 23.50 5.54 4.29 0.03 10.75 1.22 0.43 0.11 23.75 5.55 4.30 0.03 11.00 1.31 0.49 0.13 24.00 5.57 4.32 0.03 11.25 1.43 0.58 0.17 11.50 1.58 0.69 0.23 11.75 2.16 1.16 1.17 12.00 3.69 2.54 2.94 12.25 3.93 2.76 0.41 12.50 4.09 2.91 0.27 12.75 4.21 3.02 0.20 PRE Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 14 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 Subcatchment 1S: Pre Developed Runoff Area=0.480 ac 75.00% Impervious Runoff Depth>7.80" Tc=5.0 min CN=89 Runoff=6.06 cfs 0.312 af Total Runoff Area=0.480 ac Runoff Volume=0.312 af Average Runoff Depth=7.80" 25.00%Pervious=0.120 ac 75.00%Impervious=0.360 ac PRE Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 sin 06538 ©2013 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment 1S: Pre Developed [49] Hint: Tc<2dt may require smaller dt Runoff = 6.06 cfs @ 11.95 hrs, Volume= 0.312 af, Depth> 7.80" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span=0.00-24.00 hrs, dt=0.05 hrs Type H 24-hr 100-Year Rainfall=9.14" Area (ac) CN Description 0.360 98 Paved parking, HSG B 0.120 61 >75%Grass cover, Good, HSG B 0.480 89 Weighted Average 0.120 25.00% Pervious Area 0.360 75.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: Pre Developed Hydrograph ❑Runoff 1606E Type II 24-hr 1 0Year- aif1110 4 ' 5 Runoff Area=0.480 ac 4- RRUnoff VOttlm` -0:31-Z ef- - Runoff Depth>7.80" L 3- CN=89 2- 1- 0 rr, 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) PRE Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD® 10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 16 Hydrograph for Subcatchment 1S: Pre Developed Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 7.06 5.76 0.28 0.25 0.02 0.00 0.00 13.25 7.19 5.89 0.24 0.50 0.05 0.00 0.00 13.50 7.30 6.00 0.21 0.75 0.07 0.00 0.00 13.75 7.40 6.10 0.19 1.00 0.10 0.00 0.00 14.00 7.49 6.19 0.17 1.25 0.12 0.00 0.00 14.25 7.58 6.27 0.16 1.50 0.15 0.00 0.00 14.50 7.66 6.35 0.15 1.75 0.17 0.00 0.00 14.75 7.73 6.42 0.14 2.00 0.20 0.00 0.00 15.00 7.80 6.49 0.13 2.25 0.23 0.00 0.00 15.25 7.87 6.56 0.12 2.50 0.26 0.00 0.00 15.50 7.93 6.62 0.12 2.75 0.29 0.00 0.00 15.75 7.99 6.68 0.11 3.00 0.32 0.00 0.01 16.00 8.04 6.73 0.10 3.25 0.35 0.01 0.01 16.25 8.10 6.78 0.10 3.50 0.38 0.01 0.01 16.50 8.15 6.83 0.10 3.75 0.41 0.02 0.01 16.75 8.19 6.88 0.09 4.00 0.44 0.03 0.01 17.00 8.24 6.92 0.09 4.25 0.47 0.03 0.02 17.25 8.29 6.97 0.09 4.50 0.50 0.04 0.02 17.50 8.33 7.01 0.08 4.75 0.54 0.06 0.02 17.75 8.38 7.06 0.08 5.00 0.58 0.07 0.03 18.00 8.42 7.10 0.08 5.25 0.61 0.08 0.03 18.25 8.46 7.14 0.08 5.50 0.65 0.10 0.03 18.50 8.50 7.18 0.07 5.75 0.69 0.12 0.03 18.75 8.53 7.21 0.07 6.00 0.73 0.14 0.04 19.00 8.57 7.25 0.07 6.25 0.77 0.16 0.04 19.25 8.61 7.28 0.07 6.50 0.82 0.18 0.04 19.50 8.64 7.31 0.06 6.75 0.86 0.20 0.05 19.75 8.67 7.35 0.06 7.00 0.90 0.23 0.05 20.00 8.70 7.38 0.06 7.25 0.95 0.26 0.05 20.25 8.73 7.40 0.06 7.50 1.00 0.28 0.06 20.50 8.76 7.43 0.06 7.75 1.05 0.31 0.06 20.75 8.79 7.46 0.06 8.00 1.10 0.35 0.06 21.00 8.82 7.49 0.05 8.25 1.15 0.38 0.07 21.25 8.85 7.52 0.05 8.50 1.21 0.42 0.08 21.50 8.87 7.55 0.05 8.75 1.27 0.47 0.09 21.75 8.90 7.57 0.05 9.00 1.34 0.52 0.10 22.00 8.93 7.60 0.05 9.25 1.42 0.57 0.10 22.25 8.96 7.63 0.05 9.50 1.49 0.62 0.11 22.50 8.98 7.65 0.05 9.75 1.57 0.68 0.12 22.75 9.01 7.68 0.05 10.00 1.65 0.75 0.13 23.00 9.04 7.71 0.05 10.25 1.75 0.83 0.15 23.25 9.06 7.73 0.05 10.50 1.86 0.92 0.18 23.50 9.09 7.76 0.05 10.75 1.99 1.02 0.21 23.75 9.11 7.78 0.05 11.00 2.15 1.15 0.26 24.00 9.14 7.81 0.05 11.25 2.34 1.32 0.34 11.50 2.59 1.53 0.44 11.75 3.54 2.39 2.13 12.00 6.06 4.79 5.08 12.25 6.45 5.18 0.70 12.50 6.72 5.43 0.45 12.75 6.90 5.61 0.34 Post K Subca) Reach "'on. Link Routing Diagram for POST ...---\\___ Prepared by Microsoft, Printed 2/16/2015 HydroCAD®10.00 s/n 06538 0 2013 HydroCAD Software Solutions LLC POST Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.480 86 Adjusted CN from RR Spreadsheet (1S) 0.480 86 TOTAL AREA POST Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 0.000 HSG D 0.480 Other 1S 0.480 TOTAL AREA POST Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatc (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbei 0.000 0.000 0.000 0.000 0.480 0.480 Adjusted CN from RR Spreadsheet 0.000 0.000 0.000 0.000 0.480 0.480 TOTAL AREA POST Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 5 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 Subcatchment 1S: Post Developed Runoff Area=0.480 ac 0.00% Impervious Runoff Depth>1.70" Tc=5.0 min CN=86 Runoff=1.45 cfs 0.068 af Total Runoff Area=0.480 ac Runoff Volume=0.068 af Average Runoff Depth = 1.70" 100.00%Pervious=0.480 ac 0.00%Impervious=0.000 ac POST Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment IS: Post Developed [49] Hint: Tc<2dt may require smaller dt Runoff = 1.45 cfs @ 11.96 hrs, Volume= 0.068 af, Depth> 1.70" 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 1-Year Rainfall=3.04" Area (ac) CN Description * 0.480 86 Adjusted CN from RR Spreadsheet 0.000 61 >75%Grass cover, Good, HSG B 0.480 86 Weighted Average 0.480 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment IS: Post Developed Hydrograph D Runoff 145 cfs Type 1124-hr i-YYear; Rain fa II 3.04" Runoff:Area=0.480 ac Runoff VoIi1me=0.068 a�f Runoff Depth>1.70" o J 0 "1"c=5.0 min CN=86 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) POST Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 1S: Post Developed Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 2.35 1.12 0.08 0.25 0.01 0.00 0.00 13.25 2.39 1.15 0.07 0.50 0.02 0.00 0.00 13.50 2.43 1.19 0.06 0.75 0.02 0.00 0.00 13.75 2.46 1.21 0.05 1.00 0.03 0.00 0.00 14.00 2.49 1.24 0.05 1.25 0.04 0.00 0.00 14.25 2.52 1.26 0.04 1.50 0.05 0.00 0.00 14.50 2.55 1.28 0.04 1.75 0.06 0.00 0.00 14.75 2.57 1.30 0.04 2.00 0.07 0.00 0.00 15.00 2.59 1.32 0.04 2.25 0.08 0.00 0.00 15.25 2.62 1.34 0.04 2.50 0.09 0.00 0.00 15.50 2.64 1.36 0.03 2.75 0.10 0.00 0.00 15.75 2.66 1.37 0.03 3.00 0.10 0.00 0.00 16.00 2.68 1.39 0.03 3.25 0.11 0.00 0.00 16.25 2.69 1.40 0.03 3.50 0.13 0.00 0.00 16.50 2.71 1.42 0.03 3.75 0.14 0.00 0.00 16.75 2.73 1.43 0.03 4.00 0.15 0.00 0.00 17.00 2.74 1.44 0.03 4.25 0.16 0.00 0.00 17.25 2.76 1.46 0.02 4.50 0.17 0.00 0.00 17.50 2.77 1.47 0.02 4.75 0.18 0.00 0.00 17.75 2.79 1.48 0.02 5.00 0.19 0.00 0.00 18.00 2.80 1.49 0.02 5.25 0.20 0.00 0.00 18.25 2.81 1.50 0.02 5.50 0.22 0.00 0.00 18.50 2.83 1.51 0.02 5.75 0.23 0.00 0.00 18.75 2.84 1.53 0.02 6.00 0.24 0.00 0.00 19.00 2.85 1.54 0.02 6.25 0.26 0.00 0.00 19.25 2.86 1.55 0.02 6.50 0.27 0.00 0.00 19.50 2.87 1.55 0.02 6.75 0.29 0.00 0.00 19.75 2.88 1.56 0.02 7.00 0.30 0.00 0.00 20.00 2.89 1.57 0.02 7.25 0.32 0.00 0.00 20.25 2.90 1.58 0.02 7.50 0.33 0.00 0.00 20.50 2.91 1.59 0.02 7.75 0.35 0.00 0.00 20.75 2.92 1.60 0.02 8.00 0.36 0.00 0.00 21.00 2.93 1.61 0.02 8.25 0.38 0.00 0.00 21.25 2.94 1.61 0.02 8.50 0.40 0.00 0.00 21.50 2.95 1.62 0.02 8.75 0.42 0.01 0.00 21.75 2.96 1.63 0.02 9.00 0.45 0.01 0.01 22.00 2.97 1.64 0.02 9.25 0.47 0.01 0.01 22.25 2.98 1.64 0.01 9.50 0.50 0.02 0.01 22.50 2.99 1.65 0.01 9.75 0.52 0.02 0.01 22.75 3.00 1.66 0.01 10.00 0.55 0.03 0.01 23.00 3.01 1.67 0.01 10.25 0.58 0.04 0.02 23.25 3.01 1.67 0.01 10.50 0.62 0.05 0.02 23.50 3.02 1.68 0.01 10.75 0.66 0.06 0.03 23.75 3.03 1.69 0.01 11.00 0.71 0.07 0.03 24.00 3.04 1.70 0.01 11.25 0.78 0.10 0.05 11.50 0.86 0.13 0.07 11.75 1.18 0.29 0.40 12.00 2.02 0.86 1.26 12.25 2.15 0.96 0.18 12.50 2.23 1.03 0.12 12.75 2.30 1.08 0.09 POST Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 8 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 Subcatchment 1S: Post Developed Runoff Area=0.480 ac 0.00% Impervious Runoff Depth>2.26" Tc=5.0 min CN=86 Runoff=1.92 cfs 0.090 of Total Runoff Area=0.480 ac Runoff Volume=0.090 of Average Runoff Depth=2.26" 100.00%Pervious=0.480 ac 0.00%Impervious=0.000 ac POST Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment 1S: Post Developed [49] Hint: Tc<2dt may require smaller dt Runoff = 1.92 cfs @ 11.96 hrs, Volume= 0.090 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-Year Rainfall=3.68" Area (ac) CN Description * 0.480 86 Adjusted CN from RR Spreadsheet 0.000 61 >75% Grass cover, Good, HSG B 0.480 86 Weighted Average 0.480 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: Post Developed Hydrograph ' ❑Runoff 2- I l s2 ars i Type II 24-hr 21Year Rainfall 3.68" Runoff Area=0.480 ac Runoff Voltlm =0.090 aif Runoff Depth>2.26" 1" / Tc=5.0 min u. CN=86 Ar Amy r•. i%�iii�� ��J'll//. . J///.1////,tlll/J/.G„keyIli 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) POST Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 10 Hydrograph for Subcatchment 1S: Post Developed Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 2.84 1.53 0.10 0.25 0.01 0.00 0.00 13.25 2.89 1.57 0.08 0.50 0.02 0.00 0.00 13.50 2.94 1.61 0.07 0.75 0.03 0.00 0.00 13.75 2.98 1.65 0.07 1.00 0.04 0.00 0.00 14.00 3.02 1.68 0.06 1.25 0.05 0.00 0.00 14.25 3.05 1.71 0.05 1.50 0.06 0.00 0.00 14.50 3.08 1.73 0.05 1.75 0.07 0.00 0.00 14.75 3.11 1.76 0.05 2.00 0.08 0.00 0.00 15.00 3.14 1.78 0.05 2.25 0.09 0.00 0.00 15.25 3.17 1.81 0.04 2.50 0.10 0.00 0.00 15.50 3.19 1.83 0.04 2.75 0.12 0.00 0.00 15.75 3.22 1.85 0.04 3.00 0.13 0.00 0.00 16.00 3.24 1.87 0.04 3.25 0.14 0.00 0.00 16.25 3.26 1.89 0.04 3.50 0.15 0.00 0.00 16.50 3.28 1.90 0.03 3.75 0.16 0.00 0.00 16.75 3.30 1.92 0.03 4.00 0.18 0.00 0.00 17.00 3.32 1.94 0.03 4.25 0.19 0.00 0.00 17.25 3.34 1.95 0.03 4.50 0.20 0.00 0.00 17.50 3.36 1.97 0.03 4.75 0.22 0.00 0.00 17.75 3.37 1.99 0.03 5.00 0.23 0.00 0.00 18.00 3.39 2.00 0.03 5.25 0.25 0.00 0.00 18.25 3.41 2.01 0.03 5.50 0.26 0.00 0.00 18.50 3.42 2.03 0.03 5.75 0.28 0.00 0.00 18.75 3.44 2.04 0.03 6.00 0.29 0.00 0.00 19.00 3.45 2.05 0.02 6.25 0.31 0.00 0.00 19.25 3.46 2.07 0.02 6.50 0.33 0.00 0.00 19.50 3.48 2.08 0.02 6.75 0.35 0.00 0.00 19.75 3.49 2.09 0.02 7.00 0.36 0.00 0.00 20.00 3.50 2.10 0.02 7.25 0.38 0.00 0.00 20.25 3.52 2.11 0.02 7.50 0.40 0.00 0.00 20.50 3.53 2.12 0.02 7.75 0.42 0.01 0.00 20.75 3.54 2.13 0.02 8.00 0.44 0.01 0.00 21.00 3.55 2.14 0.02 8.25 0.46 0.01 0.01 21.25 3.56 2.15 0.02 8.50 0.49 0.01 0.01 21.50 3.57 2.16 0.02 8.75 0.51 0.02 0.01 21.75 3.58 2.17 0.02 9.00 0.54 0.03 0.01 22.00 3.60 2.18 0.02 9.25 0.57 0.03 0.01 22.25 3.61 2.19 0.02 9.50 0.60 0.04 0.01 22.50 3.62 2.20 0.02 9.75 0.63 0.05 0.02 22.75 3.63 2.21 0.02 10.00 0.67 0.06 0.02 23.00 3.64 2.22 0.02 10.25 0.71 0.07 0.03 23.25 3.65 2.23 0.02 10.50 0.75 0.09 0.03 23.50 3.66 2.24 0.02 10.75 0.80 0.11 0.04 23.75 3.67 2.25 0.02 11.00 0.86 0.13 0.05 24.00 3.68 2.26 0.02 11.25 0.94 0.17 0.07 11.50 1.04 0.22 0.10 11.75 1.42 0.44 0.56 12.00 2.44 1.19 1.65 12.25 2.60 1.32 0.24 12.50 2.70 1.41 0.16 12.75 2.78 1.47 0.12 POST Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 11 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 Subcatchment 1S: Post Developed Runoff Area=0.480 ac 0.00% Impervious Runoff Depth>4.00" Tc=5.0 min CN=86 Runoff=3.30 cfs 0.160 of Total Runoff Area=0.480 ac Runoff Volume=0.160 of Average Runoff Depth =4.00" 100.00%Pervious=0.480 ac 0.00%Impervious=0.000 ac POST Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment 1S: Post Developed [49] Hint: Tc<2dt may require smaller dt Runoff = 3.30 cfs @ 11.95 hrs, Volume= 0.160 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-Year Rainfall=5.57' Area (ac) CN Description * 0.480 86 Adjusted CN from RR Spreadsheet 0.000 61 >75% Grass cover, Good, HSG B 0.480 86 Weighted Average 0.480 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: Post Developed Hydrograph ❑Runoff la3ods) Y Type II 24-her 3- lo.Year Rainfall 5.57" Runoff Area=0.480 ac Runoff Volume*0. 164 alf 2 Runoff Depth>4.00•. LL Tc=5.,0 min CN=86 1 AL. o 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) POST Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 13 Hydrograph for Subcatchment 1S: Post Developed Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 4.30 2.82 0.16 0.25 0.01 0.00 0.00 13.25 4.38 2.89 0.14 0.50 0.03 0.00 0.00 13.50 4.45 2.96 0.12 0.75 0.04 0.00 0.00 13.75 4.51 3.01 0.11 1.00 0.06 0.00 0.00 14.00 4.57 3.07 0.10 1.25 0.07 0.00 0.00 14.25 4.62 3.11 0.09 1.50 0.09 0.00 0.00 14.50 4.67 3.16 0.08 1.75 0.11 0.00 0.00 14.75 4.71 3.20 0.08 2.00 0.12 0.00 0.00 15.00 4.75 3.24 0.08 2.25 0.14 0.00 0.00 15.25 4.79 3.28 0.07 2.50 0.16 0.00 0.00 15.50 4.83 3.31 0.07 2.75 0.17 0.00 0.00 15.75 4.87 3.34 0.06 3.00 0.19 0.00 0.00 16.00 4.90 3.38 0.06 3.25 0.21 0.00 0.00 16.25 4.93 3.40 0.06 3.50 0.23 0.00 0.00 16.50 4.96 3.43 0.06 3.75 0.25 0.00 0.00 16.75 4.99 3.46 0.05 4.00 0.27 0.00 0.00 17.00 5.02 3.49 0.05 4.25 0.29 0.00 0.00 17.25 5.05 3.51 0.05 4.50 0.31 0.00 0.00 17.50 5.08 3.54 0.05 4.75 0.33 0.00 0.00 17.75 5.10 3.56 0.05 5.00 0.35 0.00 0.00 18.00 5.13 3.59 0.05 5.25 0.37 0.00 0.00 18.25 5.15 3.61 0.04 5.50 0.40 0.00 0.00 18.50 5.18 3.63 0.04 5.75 0.42 0.01 0.00 18.75 5.20 3.66 0.04 6.00 0.45 0.01 0.01 19.00 5.22 3.68 0.04 6.25 0.47 0.01 0.01 19.25 5.24 3.70 0.04 6.50 0.50 0.02 0.01 19.50 5.26 3.71 0.04 6.75 0.52 0.02 0.01 19.75 5.28 3.73 0.03 7.00 0.55 0.03 0.01 20.00 5.30 3.75 0.03 7.25 0.58 0.03 0.01 20.25 5.32 3.77 0.03 7.50 0.61 0.04 0.02 20.50 5.34 3.78 0.03 7.75 0.64 0.05 0.02 20.75 5.36 3.80 0.03 8.00 0.67 0.06 0.02 21.00 5.37 3.82 0.03 8.25 0.70 0.07 0.02 21.25 5.39 3.83 0.03 8.50 0.74 0.08 0.03 21.50 5.41 3.85 0.03 8.75 0.78 0.10 0.03 21.75 5.43 3.87 0.03 9.00 0.82 0.11 0.03 22.00 5.44 3.88 0.03 9.25 0.86 0.13 0.04 22.25 5.46 3.90 0.03 9.50 0.91 0.15 0.04 22.50 5.47 3.91 0.03 9.75 0.96 0.18 0.04 22.75 5.49 3.93 0.03 10.00 1.01 0.20 0.05 23.00 5.51 3.94 0.03 10.25 1.07 0.23 0.06 23.25 5.52 3.96 0.03 10.50 1.14 0.27 0.07 23.50 5.54 3.97 0.03 10.75 1.22 0.31 0.09 23.75 5.55 3.99 0.03 11.00 1.31 0.37 0.11 24.00 5.57 4.00 0.03 11.25 1.43 0.44 0.15 11.50 1.58 0.54 0.20 11.75 2.16 0.97 1.06 12.00 3.69 2.27 2.81 12.25 3.93 2.49 0.39 12.50 4.09 2.63 0.26 12.75 4.21 2.73 0.19 POST Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 14 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 Subcatchment 1S: Post Developed Runoff Area=0.480 ac 0.00% Impervious Runoff Depth>7.44" Tc=5.0 min CN=86 Runoff=5.90 cfs 0.297 af Total Runoff Area=0.480 ac Runoff Volume=0.297 af Average Runoff Depth =7.44" 100.00%Pervious=0.480 ac 0.00%Impervious=0.000 ac POST Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment 1S: Post Developed [49] Hint: Tc<2dt may require smaller dt Runoff = 5.90 cfs @ 11.95 hrs, Volume= 0.297 af, Depth> 7.44" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt=0.05 hrs Type H 24-hr 100-Year Rainfall=9.14" Area (ac) CN Description * 0.480 86 Adjusted CN from RR Spreadsheet 0.000 61 >75% Grass cover, Good, HSG B 0.480 86 Weighted Average 0.480 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: Post Developed Hydrograph Cl Runoff 6 i 5.90 cfs Type II 24-hr 5- , 1-00--!Year Runoff Area=0.480 ac 4- RunoffV& t me*,O: 81 of Runoff Depth>7.444" 0 3- Tc=50 min LL r CN=8G 2- 1-1" 0 0 0 1 2 3 4 5 6 7 8 9 10 1.1-112- 1 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) POST Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 16 Hydrograph for Subcatchment 1S: Post Developed Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 7.06 5.42 0.28 0.25 0.02 0.00 0.00 13.25 7.19 5.55 0.24 0.50 0.05 0.00 0.00 13.50 7.30 5.66 0.21 0.75 0.07 0.00 0.00 13.75 7.40 5.76 0.19 1.00 0.10 0.00 0.00 14.00 7.49 5.84 0.16 1.25 0.12 0.00 0.00 14.25 7.58 5.92 0.15 1.50 0.15 0.00 0.00 14.50 7.66 6.00 0.15 1.75 0.17 0.00 0.00 14.75 7.73 6.07 0.14 2.00 0.20 0.00 0.00 15.00 7.80 6.14 0.13 2.25 0.23 0.00 0.00 15.25 7.87 6.20 0.12 2.50 0.26 0.00 0.00 15.50 7.93 6.26 0.12 2.75 0.29 0.00 0.00 15.75 7.99 6.32 0.11 3.00 0.32 0.00 0.00 16.00 8.04 6.37 0.10 3.25 0.35 0.00 0.00 16.25 8.10 6.42 0.10 3.50 0.38 0.00 0.00 16.50 8.15 6.47 0.09 3.75 0.41 0.00 0.00 16.75 8.19 6.52 0.09 4.00 0.44 0.01 0.01 17.00 8.24 6.57 0.09 4.25 0.47 0.01 0.01 17.25 8.29 6.61 0.09 4.50 0.50 0.02 0.01 17.50 8.33 6.65 0.08 4.75 0.54 0.02 0.01 17.75 8.38 6.70 0.08 5.00 0.58 0.03 0.02 18.00 8.42 6.74 0.08 5.25 0.61 0.04 0.02 18.25 8.46 6.78 0.08 5.50 0.65 0.05 0.02 18.50 8.50 6.81 0.07 5.75 0.69 0.07 0.02 18.75 8.53 6.85 0.07 6.00 0.73 0.08 0.03 19.00 8.57 6.89 0.07 6.25 0.77 0.10 0.03 19.25 8.61 6.92 0.06 6.50 0.82 0.11 0.03 19.50 8.64 6.95 0.06 6.75 0.86 0.13 0.04 19.75 8.67 6.98 0.06 7.00 0.90 0.15 0.04 20.00 8.70 7.01 0.06 7.25 0.95 0.17 0.04 20.25 8.73 7.04 0.06 7.50 1.00 0.20 0.05 20.50 8.76 7.07 0.06 7.75 1.05 0.22 0.05 20.75 8.79 7.10 0.05 8.00 1.10 0.25 0.05 21.00 8.82 7.13 0.05 8.25 1.15 0.28 0.06 21.25 8.85 7.15 0.05 8.50 1.21 0.31 0.07 21.50 8.87 7.18 0.05 8.75 1.27 0.35 0.08 21.75 8.90 7.21 0.05 9.00 1.34 0.39 0.08 22.00 8.93 7.24 0.05 9.25 1.42 0.44 0.09 22.25 8.96 7.26 0.05 9.50 1.49 0.49 0.09 22.50 8.98 7.29 0.05 9.75 1.57 0.54 0.10 22.75 9.01 7.31 0.05 10.00 1.65 0.60 0.12 23.00 9.04 7.34 0.05 10.25 1.75 0.67 0.14 23.25 9.06 7.37 0.05 10.50 1.86 0.75 0.16 23.50 9.09 7.39 0.05 10.75 1.99 0.85 0.20 23.75 9.11 7.42 0.05 11.00 2.15 0.96 0.23 24.00 9.14 7.44 0.05 11.25 2.34 1.11 0.31 11.50 2.59 1.31 0.41 11.75 3.54 2.13 2.03 12.00 6.06 4.47 4.96 12.25 6.45 4.84 0.68 12.50 6.72 5.09 0.44 12.75 6.90 5.27 0.33 • I> /2F:\ Area to Biofilter Biofilter SubCat Reach 'on. Routing Diagram for Biofi lter Prepared by Microsoft, Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Biofilter Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (acres) (subcatchment-numbers) 0.020 61 >75%Grass cover, Good, HSG B (1S) 0.060 98 Paved parking, HSG B (1S) 0.080 89 TOTAL AREA Biofilter Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.080 HSG B 1S 0.000 HSG C 0.000 HSG D 0.000 Other 0.080 TOTAL AREA Biofilter Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.020 0.000 0.000 0.000 0.020 >75%Grass cover, Good 1S 0.000 0.060 0.000 0.000 0.000 0.060 Paved parking 1S 0.000 0.080 0.000 0.000 0.000 0.080 TOTAL AREA Biofilter Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 5 Pipe Listing (all nodes) Line# Node In-Invert Out-Invert Length Slope n Diam/Width Height Inside-Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 2P 618.15 615.75 68.7 0.0349 0.130 15.0 0.0 0.0 Biofilter Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 6 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 Subcatchment 1S: Area to Biofilter Runoff Area=0.080 ac 75.00% Impervious Runoff Depth>1.93" Tc=5.0 min CN=89 Runoff=0.27 cfs 0.013 af Pond 2P: Biofilter Peak Elev=623.08' Storage=158 cf Inflow=0.27 cfs 0.013 af Outflow=0.27 cfs 0.010 af Total Runoff Area=0.080 ac Runoff Volume=0.013 af Average Runoff Depth=1.93" 25.00%Pervious=0.020 ac 75.00%Impervious=0.060 ac Biofilter Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 1S: Area to Biofilter [49] Hint: Tc<2dt may require smaller dt Runoff = 0.27 cfs @ 11.95 hrs, Volume= 0.013 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 1-Year Rainfall=3.04" Area (ac) CN Description 0.020 61 >75% Grass cover, Good, HSG B 0.060 98 Paved parking, HSG B 0.080 89 Weighted Average 0.020 25.00% Pervious Area 0.060 75.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: Area to Biofilter Hydrograph 0.3 I Ru ❑ noff 0.28 • 027 cfs 0.26- Type II 24-hir 0.24:- • 1-Year Rair falll=3.14" 0.22'- ; Rtn©ff Area=0.a8O 018;. 2 nr ff Volume=O:O1 of-- Runoff Dep#h>f.93" c 0.14 Tc= ] ,, 5 --rrllrl_-- 0.12= - • - - - - -- 0.1-. 0.08 ' • 0.06 i 0 . , 0.04 " ' 0.02 0 Z.//..I . / . r. .ii//. i// � �` .11.11 .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) Biofilter Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 1S: Area to Biofilter Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 2.35 1.32 0.01 0.25 0.01 0.00 0.00 13.25 2.39 1.36 0.01 0.50 0.02 0.00 0.00 13.50 2.43 1.39 0.01 0.75 0.02 0.00 0.00 13.75 2.46 1.42 0.01 1.00 0.03 0.00 0.00 14.00 2.49 1.45 0.01 1.25 0.04 0.00 0.00 14.25 2.52 1.47 0.01 1.50 0.05 0.00 0.00 14.50 2.55 1.50 0.01 1.75 0.06 0.00 0.00 14.75 2.57 1.52 0.01 2.00 0.07 0.00 0.00 15.00 2.59 1.54 0.01 2.25 0.08 0.00 0.00 15.25 2.62 1.56 0.01 2.50 0.09 0.00 0.00 15.50 2.64 1.58 0.01 2.75 0.10 0.00 0.00 15.75 2.66 1.59 0.01 3.00 0.10 0.00 0.00 16.00 2.68 1.61 0.01 3.25 0.11 0.00 0.00 16.25 2.69 1.62 0.00 3.50 0.13 0.00 0.00 16.50 2.71 1.64 0.00 3.75 0.14 0.00 0.00 16.75 2.73 1.65 0.00 4.00 0.15 0.00 0.00 17.00 2.74 1.67 0.00 4.25 0.16 0.00 0.00 17.25 2.76 1.68 0.00 4.50 0.17 0.00 0.00 17.50 2.77 1.69 0.00 4.75 0.18 0.00 0.00 17.75 2.79 1.71 0.00 5.00 0.19 0.00 0.00 18.00 2.80 1.72 0.00 5.25 0.20 0.00 0.00 18.25 2.81 1.73 0.00 5.50 0.22 0.00 0.00 18.50 2.83 1.74 0.00 5.75 0.23 0.00 0.00 18.75 2.84 1.75 0.00 6.00 0.24 0.00 0.00 19.00 2.85 1.77 0.00 6.25 0.26 0.00 0.00 19.25 2.86 1.78 0.00 6.50 0.27 0.00 0.00 19.50 2.87 1.79 0.00 6.75 0.29 0.00 0.00 19.75 2.88 1.80 0.00 7.00 0.30 0.00 0.00 20.00 2.89 1.80 0.00 7.25 0.32 0.00 0.00 20.25 2.90 1.81 0.00 7.50 0.33 0.01 0.00 20.50 2.91 1.82 0.00 7.75 0.35 0.01 0.00 20.75 2.92 1.83 0.00 8.00 0.36 0.01 0.00 21.00 2.93 1.84 0.00 8.25 0.38 0.01 0.00 21.25 2.94 1.85 0.00 8.50 0.40 0.02 0.00 21.50 2.95 1.86 0.00 8.75 0.42 0.02 0.00 21.75 2.96 1.86 0.00 9.00 0.45 0.03 0.00 22.00 2.97 1.87 0.00 9.25 0.47 0.03 0.00 22.25 2.98 1.88 0.00 9.50 0.50 0.04 0.00 22.50 2.99 1.89 0.00 9.75 0.52 0.05 0.00 22.75 3.00 1.90 0.00 10.00 0.55 0.06 0.00 23.00 3.01 1.91 0.00 10.25 0.58 0.07 0.00 23.25 3.01 1.91 0.00 10.50 0.62 0.09 0.00 23.50 3.02 1.92 0.00 10.75 0.66 0.10 0.01 23.75 3.03 1.93 0.00 11.00 0.71 0.13 0.01 24.00 3.04 1.94 0.00 11.25 0.78 0.16 0.01 11.50 0.86 0.20 0.01 11.75 1.18 0.40 0.08 12.00 2.02 1.04 0.23 12.25 2.15 1.15 0.03 12.50 2.23 1.23 0.02 12.75 2.30 1.28 0.02 Biofilter Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 9 Summary for Pond 2P: Biofilter Inflow Area = 0.080 ac, 75.00% Impervious, Inflow Depth > 1.93" for 1-Year event Inflow = 0.27 cfs @ 11.95 hrs, Volume= 0.013 af Outflow = 0.27 cfs @ 11.97 hrs, Volume= 0.010 af, Atten=2%, Lag= 1.2 min Primary = 0.27 cfs @ 11.97 hrs, Volume= 0.010 af Routing by Stor-Ind method, Time Span=0.00-24.00 hrs, dt=0.05 hrs Peak Elev=623.08'@ 11.97 hrs Surf.Area= 349 sf Storage= 158 cf Plug-Flow detention time= 134.2 min calculated for 0.010 af(76%of inflow) Center-of-Mass det.time=45.2 min ( 853.8-808.6 ) Volume Invert Avail.Storage Storage Description #1 622.50' 606 cf Custom Stage Data(Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (so-ft) (cubic-feet) (cubic feet) 622.50 203 0 0 623.00 327 133 133 624.00 620 474 606 Device Routing Invert Outlet Devices #1 Primary 618.15' 15.0" Round Culvert L=68.7' RCP, groove end projecting, Ke=0.200 Inlet/Outlet Invert=618.15'/615.75' S=0.0349'/' Cc=0.900 n=0.130, Flow Area= 1.23 sf #2 Device 1 623.00' 15.0"Horiz. Orifice/Grate C=0.600 Limited to weir flow at low heads Primary OutFlow Max=0.25 cfs @ 11.97 hrs HW=623.07' (Free Discharge) L1=Culvert (Passes 0.25 cfs of 1.91 cfs potential flow) t2=Orifice/Grate (Weir Controls 0.25 cfs @ 0.88 fps) Biofilter Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 10 Pond 2P: Biofilter Hydrograph Z. 1 'r,- 1 . . ' .,- 0.3- ®IM1ow o.ri crs ; i ; nmary 0.28 � ; , , a=Q . , , , y a �V n Idw`A�r� Q�a� 0.26 0.24= Peak EIe 62at0&-' 0.22= teirage� 5 C; 0.2� 0.18= • 0.16y" O 0.14' 0.12- ,/ ' • , , 0.06-• 0.04= - ' �t � ,%x r a :r,rir✓/��;✓;, ��N`.s;+'a�,v v���,+'�r :'"`�'A"�'°Vial.d";,;r"�i+,+` t-,. • 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) Pond 2P: Biofilter Stage-Discharge 624 [O Primary /1 c 1 o mss, w /.101.1rOrifice/Grate 623 p, f r , 0 , 2 Discharge (cfs) Biofilter Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 11 Pond 2P: Biofilter Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 50 100 150 200 250 300 350 400 450 500 550 600 I Surface I . . 1 ' . a % 0 Storage 624 r/�r�f/f, 0 m ' w 623-- S .. ./ / J ��Custom Stage Data 0 50 100 150 200 250 300 350 400 450 500 550 600 Storage(cubic-feet) Biofilter Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 12 Hydrograph for Pond 2P: Biofilter Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 622.50 0.00 0.50 0.00 0 622.50 0.00 1.00 0.00 0 622.50 0.00 1.50 0.00 0 622.50 0.00 2.00 0.00 0 622.50 0.00 2.50 0.00 0 622.50 0.00 3.00 0.00 0 622.50 0.00 3.50 0.00 0 622.50 0.00 4.00 0.00 0 622.50 0.00 4.50 0.00 0 622.50 0.00 5.00 0.00 0 622.50 0.00 5.50 0.00 0 622.50 0.00 6.00 0.00 0 622.50 0.00 6.50 0.00 0 622.50 0.00 7.00 0.00 1 622.50 0.00 7.50 0.00 1 622.51 0.00 8.00 0.00 3 622.51 0.00 8.50 0.00 5 622.52 0.00 9.00 0.00 8 622.54 0.00 9.50 0.00 11 622.55 0.00 10.00 0.00 16 622.58 0.00 10.50 0.00 24 622.61 0.00 11.00 0.01 35 622.66 0.00 11.50 0.01 55 622.74 0.00 12.00 0.23 157 623.07 0.25 12.50 0.02 137 623.01 0.02 13.00 0.01 136 623.01 0.01 13.50 0.01 135 623.01 0.01 14.00 0.01 135 623.01 0.01 14.50 0.01 134 623.01 0.01 15.00 0.01 134 623.01 0.01 15.50 0.01 134 623.00 0.01 16.00 0.01 134 623.00 0.01 16.50 0.00 134 623.00 0.00 17.00 0.00 134 623.00 0.00 17.50 0.00 134 623.00 0.00 18.00 0.00 134 623.00 0.00 18.50 0.00 133 623.00 0.00 19.00 0.00 133 623.00 0.00 19.50 0.00 133 623.00 0.00 20.00 0.00 133 623.00 0.00 20.50 0.00 133 623.00 0.00 21.00 0.00 133 623.00 0.00 21.50 0.00 133 623.00 0.00 22.00 0.00 133 623.00 0.00 22.50 0.00 133 623.00 0.00 23.00 0.00 133 623.00 0.00 23.50 0.00 133 623.00 0.00 24.00 0.00 133 623.00 0.00 Biofilter Type 11 24-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 13 Stage-Discharge for Pond 2P: Biofilter Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) 622.50 0.00 623.02 0.04 623.54 1.98 622.51 0.00 623.03 0.07 623.55 1.98 622.52 0.00 623.04 0.10 623.56 1.99 622.53 0.00 623.05 0.14 623.57 1.99 622.54 0.00 623.06 0.19 623.58 1.99 622.55 0.00 623.07 0.24 623.59 1.99 622.56 0.00 623.08 0.29 623.60 1.99 622.57 0.00 623.09 0.35 623.61 1.99 622.58 0.00 623.10 0.41 623.62 1.99 622.59 0.00 623.11 0.47 623.63 2.00 622.60 0.00 623.12 0.53 623.64 2.00 622.61 0.00 623.13 0.60 623.65 2.00 622.62 0.00 623.14 0.67 623.66 2.00 622.63 0.00 623.15 0.75 623.67 2.00 622.64 0.00 623.16 0.82 623.68 2.00 622.65 0.00 623.17 0.90 623.69 2.00 622.66 0.00 623.18 0.98 623.70 2.01 622.67 0.00 623.19 1.06 623.71 2.01 622.68 0.00 623.20 1.15 623.72 2.01 622.69 0.00 623.21 1.24 623.73 2.01 622.70 0.00 623.22 1.33 623.74 2.01 622.71 0.00 623.23 1.42 623.75 2.01 622.72 0.00 623.24 1.51 623.76 2.02 622.73 0.00 623.25 1.61 623.77 2.02 622.74 0.00 623.26 1.70 623.78 2.02 622.75 0.00 623.27 1.80 623.79 2.02 622.76 0.00 623.28 1.90 623.80 2.02 622.77 0.00 623.29 1.94 623.81 2.02 622.78 0.00 623.30 1.95 623.82 2.02 622.79 0.00 623.31 1.95 623.83 2.03 622.80 0.00 623.32 1.95 623.84 2.03 622.81 0.00 623.33 1.95 623.85 2.03 622.82 0.00 623.34 1.95 623.86 2.03 622.83 0.00 623.35 1.95 623.87 2.03 622.84 0.00 623.36 1.95 623.88 2.03 622.85 0.00 623.37 1.96 623.89 2.03 622.86 0.00 623.38 1.96 623.90 2.04 622.87 0.00 623.39 1.96 623.91 2.04 622.88 0.00 623.40 1.96 623.92 2.04 622.89 0.00 623.41 1.96 623.93 2.04 622.90 0.00 623.42 1.96 623.94 2.04 622.91 0.00 623.43 1.97 623.95 2.04 622.92 0.00 623.44 1.97 623.96 2.05 622.93 0.00 623.45 1.97 623.97 2.05 622.94 0.00 623.46 1.97 623.98 2.05 622.95 0.00 623.47 1.97 623.99 2.05 622.96 0.00 623.48 1.97 624.00 2.05 622.97 0.00 623.49 1.97 622.98 0.00 623.50 1.98 622.99 0.00 623.51 1.98 623.00 0.00 623.52 1.98 623.01 0.01 623.53 1.98 Biofilter Type 1124-hr 1-Year Rainfall=3.04" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 14 Stage-Area-Storage for Pond 2P: Biofilter Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 622.50 203 0 623.54 485 352 622.52 208 4 623.56 491 362 622.54 213 8 623.58 497 371 622.56 218 13 623.60 503 381 622.58 223 17 623.62 509 392 622.60 228 22 623.64 515 402 622.62 233 26 623.66 520 412 622.64 238 31 623.68 526 423 622.66 243 36 623.70 532 433 622.68 248 41 623.72 538 444 622.70 253 46 623.74 544 455 622.72 258 51 623.76 550 466 622.74 263 56 623.78 556 477 622.76 267 61 623.80 561 488 622.78 272 67 623.82 567 499 622.80 277 72 623.84 573 511 622.82 282 78 623.86 579 522 622.84 287 83 623.88 585 534 622.86 292 89 623.90 591 545 622.88 297 95 623.92 597 557 622.90 302 101 623.94 602 569 622.92 307 107 623.96 608 581 622.94 312 113 623.98 614 594 622.96 317 120 624.00 620 606 622.98 322 126 623.00 327 133 623.02 333 139 623.04 339 146 623.06 345 153 623.08 350 160 623.10 356 167 623.12 362 174 623.14 368 181 623.16 374 189 623.18 380 196 623.20 386 204 623.22 391 212 623.24 397 219 623.26 403 227 623.28 409 236 623.30 415 244 623.32 421 252 623.34 427 261 623.36 432 269 623.38 438 278 623.40 444 287 623.42 450 296 623.44 456 305 623.46 462 314 623.48 468 323 623.50 474 333 623.52 479 342 Biofilter Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 15 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 Subcatchment 1S: Area to Biofilter Runoff Area=0.080 ac 75.00% Impervious Runoff Depth>2.52" Tc=5.0 min CN=89 Runoff=0.35 cfs 0.017 af Pond 2P: Biofilter Peak Elev=623.09' Storage=162 cf Inflow=0.35 cfs 0.017 af Outflow=0.34 cfs 0.014 af Total Runoff Area=0.080 ac Runoff Volume=0.017 af Average Runoff Depth =2.52" 25.00%Pervious=0.020 ac 75.00%Impervious=0.060 ac Biofilter Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 16 Summary for Subcatchment 1S: Area to Biofilter [49] Hint: Tc<2dt may require smaller dt Runoff = 0.35 cfs @ 11.95 hrs, Volume= 0.017 af, Depth> 2.52" 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-Year Rainfall=3.68" Area (ac) CN Description 0.020 61 >75% Grass cover, Good, HSG B 0.060 98 Paved parking, HSG B 0.080 89 Weighted Average 0.020 25.00% Pervious Area 0.060 75.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: Area to Biofilter Hydrograph 0.38* ❑Runoff 0.36= iLii I a35,13 Type_1124-hr_._ 0.32 ---- -- -- ----- - - - 0.3 / ;2-i ear RainfC l� .68 1 R4n0-Area=0:080 ae 0.24 �n �i. l�m �� _� ._ f- o oo Ruin-off llep h 2:521' 0.18 Tc=5O t In 0.14 CsN89_-- 0.12-i , o-1i .3 0.08 ..a , , ' 0 , , , , 0.06 0.04 / �/�►�,/ 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) Biofilter Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 17 Hydrograph for Subcatchment 1S: Area to Biofilter Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 2.84 1.76 0.02 0.25 0.01 0.00 0.00 13.25 2.89 1.80 0.01 0.50 0.02 0.00 0.00 13.50 2.94 1.85 0.01 0.75 0.03 0.00 0.00 13.75 2.98 1.88 0.01 1.00 0.04 0.00 0.00 14.00 3.02 1.92 0.01 1.25 0.05 0.00 0.00 14.25 3.05 1.95 0.01 1.50 0.06 0.00 0.00 14.50 3.08 1.97 0.01 1.75 0.07 0.00 0.00 14.75 3.11 2.00 0.01 2.00 0.08 0.00 0.00 15.00 3.14 2.03 0.01 2.25 0.09 0.00 0.00 15.25 3.17 2.05 0.01 2.50 0.10 0.00 0.00 15.50 3.19 2.08 0.01 2.75 0.12 0.00 0.00 15.75 3.22 2.10 0.01 3.00 0.13 0.00 0.00 16.00 3.24 2.12 0.01 3.25 0.14 0.00 0.00 16.25 3.26 2.14 0.01 3.50 0.15 0.00 0.00 16.50 3.28 2.15 0.01 3.75 0.16 0.00 0.00 16.75 3.30 2.17 0.01 4.00 0.18 0.00 0.00 17.00 3.32 2.19 0.01 4.25 0.19 0.00 0.00 17.25 3.34 2.21 0.01 4.50 0.20 0.00 0.00 17.50 3.36 2.22 0.01 4.75 0.22 0.00 0.00 17.75 3.37 2.24 0.01 5.00 0.23 0.00 0.00 18.00 3.39 2.26 0.00 5.25 0.25 0.00 0.00 18.25 3.41 2.27 0.00 5.50 0.26 0.00 0.00 18.50 3.42 2.28 0.00 5.75 0.28 0.00 0.00 18.75 3.44 2.30 0.00 6.00 0.29 0.00 0.00 19.00 3.45 2.31 0.00 6.25 0.31 0.00 0.00 19.25 3.46 2.32 0.00 6.50 0.33 0.01 0.00 19.50 3.48 2.34 0.00 6.75 0.35 0.01 0.00 19.75 3.49 2.35 0.00 7.00 0.36 0.01 0.00 20.00 3.50 2.36 0.00 7.25 0.38 0.01 0.00 20.25 3.52 2.37 0.00 7.50 0.40 0.02 0.00 20.50 3.53 2.38 0.00 7.75 0.42 0.02 0.00 20.75 3.54 2.39 0.00 8.00 0.44 0.03 0.00 21.00 3.55 2.40 0.00 8.25 0.46 0.03 0.00 21.25 3.56 2.41 0.00 8.50 0.49 0.04 0.00 21.50 3.57 2.42 0.00 8.75 0.51 0.05 0.00 21.75 3.58 2.44 0.00 9.00 0.54 0.06 0.00 22.00 3.60 2.45 0.00 9.25 0.57 0.07 0.00 22.25 3.61 2.46 0.00 9.50 0.60 0.08 0.00 22.50 3.62 2.47 0.00 9.75 0.63 0.09 0.00 22.75 3.63 2.48 0.00 10.00 0.67 0.11 0.01 23.00 3.64 2.49 0.00 10.25 0.71 0.12 0.01 23.25 3.65 2.50 0.00 10.50 0.75 0.15 0.01 23.50 3.66 2.51 0.00 10.75 0.80 0.17 0.01 23.75 3.67 2.51 0.00 11.00 0.86 0.21 0.01 24.00 3.68 2.52 0.00 11.25 0.94 0.25 0.02 11.50 1.04 0.31 0.02 11.75 1.42 0.57 0.11 12.00 2.44 1.40 0.30 12.25 2.60 1.54 0.04 12.50 2.70 1.64 0.03 12.75 2.78 1.70 0.02 Biofilter Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD® 10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 18 Summary for Pond 2P: Biofilter Inflow Area = 0.080 ac, 75.00% Impervious, Inflow Depth > 2.52" for 2-Year event Inflow = 0.35 cfs @ 11.95 hrs, Volume= 0.017 af Outflow = 0.34 cfs @ 11.97 hrs, Volume= 0.014 af, Atten=4%, Lag= 1.2 min Primary = 0.34 cfs @ 11.97 hrs, Volume= 0.014 af Routing by Stor-Ind method, Time Span=0.00-24.00 hrs, dt=0.05 hrs Peak Elev=623.09' @ 11.97 hrs Surf.Area=353 sf Storage= 162 cf Plug-Flow detention time= 113.6 min calculated for 0.014 af(82%of inflow) Center-of-Mass det.time=37.3 min( 838.4-801.1 ) Volume Invert Avail.Storage Storage Description #1 622.50' 606 cf Custom Stage Data(Prismatic)Listed below(Recaic) Elevation Surf.Area Inc.Store Cum.Store (feet) (so-ft) (cubic-feet) (cubic-feet) 622.50 203 0 0 623.00 327 133 133 624.00 620 474 606 Device Routing Invert Outlet Devices #1 Primary 618.15' 15.0" Round Culvert L=68.7' RCP, groove end projecting, Ke=0.200 Inlet/Outlet Invert=618.15'/615.75' S=0.0349'/' Cc=0.900 n=0.130, Flow Area= 1.23 sf #2 Device 1 623.00' 15.0" Horiz.Orifice/Grate C=0.600 Limited to weir flow at low heads Primary OutFlow Max=0.33 cfs @ 11.97 hrs HW=623.09' (Free Discharge) L1=Culvert (Passes 0.33 cfs of 1.91 cfs potential flow) t2=Orifice/Grate (Weir Controls 0.33 cfs @ 0.96 fps) Biofilter Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 19 Pond 2P: Biofilter Hydrograph , M Inflow 0.38i-' / ; : ' . :, 1 1:° 5c1 i :4 i 1 i- , 0 Primary o.36', " : : 1 Inflovi_Area*OA)80 ac ...-- - r " Peak 623 o6* 0327 :ea,' L ; * i ' j evL- , , . . . , . , Storage=1132_ cr _ -P.. ___• 0.264 ... ,-' , ; ; 4 ■ i- 0.241- ,--:_ 0.24 o 0.18- 0.141' / iii 0.12..- ,./ :. - , • 0.1-7 0084, / . . ; f.:.,4,,, 0.06-::' ... ' ; , ; - 0.. 0.024:' ".,,` '''')/ 4"4,/,',, 2,-.4"...',.;/,'' ••-,''.4.,....44, , -. ' :44..!..,..."4`,.4,,!i":":: ::'--"',4,...."4.44::—'.-'.'*-"/ 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) Pond 2P: Biofilter Stage-Discharge 624 1 LatriLimary ve „,I0 I,,:/,,,: m m .." .... I AouramoiimmissiormorAmplaMMIIIIIIK c. = cv > 0 Air-A•01110111111r w ....grAir Orifice/Grate , 623 er , x , , , , , ,___.1,_:7 0 1 , 2 Discharge (cfs) Biofilter Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 20 Pond 2P: Biofilter Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 50 100 150 200 250 300 350 400 450 500 550 600 II Surface i . . , . . . I . . . l l . . , r . . . . . . l ❑Storage 624 ��f f/I.• ///,./' m rte/ c , 0 m , , w 623-" CuStiDtfl.stage�t8 . 0 50 100 150 200 250 300 350 400 450 500 550 600 Storage(cubic-feet) Biofilter Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 21 Hydrograph for Pond 2P: Biofilter Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 622.50 0.00 0.50 0.00 0 622.50 0.00 1.00 0.00 0 622.50 0.00 1.50 0.00 0 622.50 0.00 2.00 0.00 0 622.50 0.00 2.50 0.00 0 622.50 0.00 3.00 0.00 0 622.50 0.00 3.50 0.00 0 622.50 0.00 4.00 0.00 0 622.50 0.00 4.50 0.00 0 622.50 0.00 5.00 0.00 0 622.50 0.00 5.50 0.00 0 622.50 0.00 6.00 0.00 0 622.50 0.00 6.50 0.00 1 622.51 0.00 7.00 0.00 3 622.51 0.00 7.50 0.00 5 622.52 0.00 8.00 0.00 7 622.53 0.00 8.50 0.00 11 622.55 0.00 9.00 0.00 15 622.57 0.00 9.50 0.00 22 622.60 0.00 10.00 0.01 29 622.63 0.00 10.50 0.01 40 622.68 0.00 11.00 0.01 57 622.74 0.00 11.50 0.02 84 622.84 0.00 12.00 0.30 162 623.09 0.32 12.50 0.03 138 623.02 0.03 13.00 0.02 136 623.01 0.02 13.50 0.01 136 623.01 0.01 14.00 0.01 135 623.01 0.01 14.50 0.01 135 623.01 0.01 15.00 0.01 135 623.01 0.01 15.50 0.01 134 623.01 0.01 16.00 0.01 134 623.01 0.01 16.50 0.01 134 623.00 0.01 17.00 0.01 134 623.00 0.01 17.50 0.01 134 623.00 0.01 18.00 0.00 134 623.00 0.01 18.50 0.00 134 623.00 0.00 19.00 0.00 134 623.00 0.00 19.50 0.00 134 623.00 0.00 20.00 0.00 133 623.00 0.00 20.50 0.00 133 623.00 0.00 21.00 0.00 133 623.00 0.00 21.50 0.00 133 623.00 0.00 22.00 0.00 133 623.00 0.00 22.50 0.00 133 623.00 0.00 23.00 0.00 133 623.00 0.00 23.50 0.00 133 623.00 0.00 24.00 0.00 133 623.00 0.00 Biofilter Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 22 Stage-Discharge for Pond 2P: Biofilter Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) 622.50 0.00 623.02 0.04 623.54 1.98 622.51 0.00 623.03 0.07 623.55 1.98 622.52 0.00 623.04 0.10 623.56 1.99 622.53 0.00 623.05 0.14 623.57 1.99 622.54 0.00 623.06 0.19 623.58 1.99 622.55 0.00 623.07 0.24 623.59 1.99 622.56 0.00 623.08 0.29 623.60 1.99 622.57 0.00 623.09 0.35 623.61 1.99 622.58 0.00 623.10 0.41 623.62 1.99 622.59 0.00 623.11 0.47 623.63 2.00 622.60 0.00 623.12 0.53 623.64 2.00 622.61 0.00 623.13 0.60 623.65 2.00 622.62 0.00 623.14 0.67 623.66 2.00 622.63 0.00 623.15 0.75 623.67 2.00 622.64 0.00 623.16 0.82 623.68 2.00 622.65 0.00 623.17 0.90 623.69 2.00 622.66 0.00 623.18 0.98 623.70 2.01 622.67 0.00 623.19 1.06 623.71 2.01 622.68 0.00 623.20 1.15 623.72 2.01 622.69 0.00 623.21 1.24 623.73 2.01 622.70 0.00 623.22 1.33 623.74 2.01 622.71 0.00 623.23 1.42 623.75 2.01 622.72 0.00 623.24 1.51 623.76 2.02 622.73 0.00 623.25 1.61 623.77 2.02 622.74 0.00 623.26 1.70 623.78 2.02 622.75 0.00 623.27 1.80 623.79 2.02 622.76 0.00 623.28 1.90 623.80 2.02 622.77 0.00 623.29 1.94 623.81 2.02 622.78 0.00 623.30 1.95 623.82 2.02 622.79 0.00 623.31 1.95 623.83 2.03 622.80 0.00 623.32 1.95 623.84 2.03 622.81 0.00 623.33 1.95 623.85 2.03 622.82 0.00 623.34 1.95 623.86 2.03 622.83 0.00 623.35 1.95 623.87 2.03 622.84 0.00 623.36 1.95 623.88 2.03 622.85 0.00 623.37 1.96 623.89 2.03 622.86 0.00 623.38 1.96 623.90 2.04 622.87 0.00 623.39 1.96 623.91 2.04 622.88 0.00 623.40 1.96 623.92 2.04 622.89 0.00 623.41 1.96 623.93 2.04 622.90 0.00 623.42 1.96 623.94 2.04 622.91 0.00 623.43 1.97 623.95 2.04 622.92 0.00 623.44 1.97 623.96 2.05 622.93 0.00 623.45 1.97 623.97 2.05 622.94 0.00 623.46 1.97 623.98 2.05 622.95 0.00 623.47 1.97 623.99 2.05 622.96 0.00 623.48 1.97 624.00 2.05 622.97 0.00 623.49 1.97 622.98 0.00 623.50 1.98 622.99 0.00 623.51 1.98 623.00 0.00 623.52 1.98 623.01 0.01 623.53 1.98 Biofilter Type 1124-hr 2-Year Rainfall=3.68" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 23 Stage-Area-Storage for Pond 2P: Biofilter Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 622.50 203 0 623.54 485 352 622.52 208 4 623.56 491 362 622.54 213 8 623.58 497 371 622.56 218 13 623.60 503 381 622.58 223 17 623.62 509 392 622.60 228 22 623.64 515 402 622.62 233 26 623.66 520 412 622.64 238 31 623.68 526 423 622.66 243 36 623.70 532 433 622.68 248 41 623.72 538 444 622.70 253 46 623.74 544 455 622.72 258 51 623.76 550 466 622.74 263 56 623.78 556 477 622.76 267 61 623.80 561 488 622.78 272 67 623.82 567 499 622.80 277 72 623.84 573 511 622.82 282 78 623.86 579 522 622.84 287 83 623.88 585 534 622.86 292 89 623.90 591 545 622.88 297 95 623.92 597 557 622.90 302 101 623.94 602 569 622.92 307 107 623.96 608 581 622.94 312 113 623.98 614 594 622.96 317 120 624.00 620 606 622.98 322 126 623.00 327 133 623.02 333 139 623.04 339 146 623.06 345 153 623.08 350 160 623.10 356 167 623.12 362 174 623.14 368 181 623.16 374 189 623.18 380 196 623.20 386 204 623.22 391 212 623.24 397 219 623.26 403 227 623.28 409 236 623.30 415 244 623.32 421 252 623.34 427 261 623.36 432 269 623.38 438 278 623A0 444 287 623.42 450 296 623.44 456 305 623.46 462 314 623.48 468 323 623.50 474 333 623.52 479 342 Biofilter Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 24 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 Subcatchment 1S:Area to Biofilter Runoff Area=0.080 ac 75.00% Impervious Runoff Depth>4.32" Tc=5.0 min CN=89 Runoff=0.58 cfs 0.029 af Pond 2P: Biofilter Peak Elev=623.12' Storage=175 cf Inflow=0.58 cfs 0.029 af Outflow=0.56 cfs 0.026 af Total Runoff Area=0.080 ac Runoff Volume=0.029 af Average Runoff Depth=4.32" 25.00%Pervious=0.020 ac 75.00%Impervious=0.060 ac Biofilter Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 25 Summary for Subcatchment 1S: Area to Biofilter [49] Hint: Tc<2dt may require smaller dt Runoff = 0.58 cfs @ 11.95 hrs, Volume= 0.029 af, Depth> 4.32" 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-Year Rainfall=5.57" Area (ac) CN Description 0.020 61 >75% Grass cover, Good, HSG B 0.060 98 Paved parking, HSG B 0.080 89 Weighted Average 0.020 25.00% Pervious Area 0.060 75.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 1S: Area to Biofilter Hydrograph 0.65 r T D Runoff 0.67;" o.5e as 0.55 I ype H 24=hr ' 0=Year -Ramnfa�1l 5.57 ' 0 = Runoff Aea=0:x80 ac 0.4- Rui n c ff;Volum{e=0.029 af 0.35- Runoff Depth>4.32" LT. 0.3~ Tc=5.0 Min 0.25- dN 89 0.2- 0.15-? 0.1 0.05 " / ��I' o /J/f///////.%,/rf!/.�i.%//////,rJ/1/r� / i//.�./1,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) Biofilter Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 26 Hydrograph for Subcatchment 1S: Area to Biofilter Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 4.30 3.11 0.03 0.25 0.01 0.00 0.00 13.25 4.38 3.18 0.02 0.50 0.03 0.00 0.00 13.50 4.45 3.25 0.02 0.75 0.04 0.00 0.00 13.75 4.51 3.31 0.02 1.00 0.06 0.00 0.00 14.00 4.57 3.36 0.02 1.25 0.07 0.00 0.00 14.25 4.62 3.41 0.02 1.50 0.09 0.00 0.00 14.50 4.67 3.45 0.01 1.75 0.11 0.00 0.00 14.75 4.71 3.50 0.01 2.00 0.12 0.00 0.00 15.00 4.75 3.54 0.01 2.25 0.14 0.00 0.00 15.25 4.79 3.58 0.01 2.50 0.16 0.00 0.00 15.50 4.83 3.61 0.01 2.75 0.17 0.00 0.00 15.75 4.87 3.65 0.01 3.00 0.19 0.00 0.00 16.00 4.90 3.68 0.01 3.25 0.21 0.00 0.00 16.25 4.93 3.71 0.01 3.50 0.23 0.00 0.00 16.50 4.96 3.74 0.01 3.75 0.25 0.00 0.00 16.75 4.99 3.77 0.01 4.00 0.27 0.00 0.00 17.00 5.02 3.79 0.01 4.25 0.29 0.00 0.00 17.25 5.05 3.82 0.01 4.50 0.31 0.00 0.00 17.50 5.08 3.85 0.01 4.75 0.33 0.01 0.00 17.75 5.10 3.87 0.01 5.00 0.35 0.01 0.00 18.00 5.13 3.90 0.01 5.25 0.37 0.01 0.00 18.25 5.15 3.92 0.01 5.50 0.40 0.02 0.00 18.50 5.18 3.94 0.01 5.75 0.42 0.02 0.00 18.75 5.20 3.96 0.01 6.00 0.45 0.03 0.00 19.00 5.22 3.99 0.01 6.25 0.47 0.03 0.00 19.25 5.24 4.01 0.01 6.50 0.50 0.04 0.00 19.50 5.26 4.03 0.01 6.75 0.52 0.05 0.00 19.75 5.28 4.04 0.01 7.00 0.55 0.06 0.00 20.00 5.30 4.06 0.01 7.25 0.58 0.07 0.00 20.25 5.32 4.08 0.01 7.50 0.61 0.08 0.00 20.50 5.34 4.10 0.01 7.75 0.64 0.09 0.00 20.75 5.36 4.11 0.01 8.00 0.67 0.11 0.00 21.00 5.37 4.13 0.01 8.25 0.70 0.12 0.00 21.25 5.39 4.15 0.01 8.50 0.74 0.14 0.01 21.50 5.41 4.16 0.01 8.75 0.78 0.16 0.01 21.75 5.43 4.18 0.01 9.00 0.82 0.18 0.01 22.00 5.44 4.20 0.01 9.25 0.86 0.20 0.01 22.25 5.46 4.21 0.01 9.50 0.91 0.23 0.01 22.50 5.47 4.23 0.01 9.75 0.96 0.26 0.01 22.75 5.49 4.24 0.01 10.00 1.01 0.29 0.01 23.00 5.51 4.26 0.00 10.25 1.07 0.33 0.01 23.25 5.52 4.27 0.00 10.50 1.14 0.37 0.01 23.50 5.54 4.29 0.00 10.75 1.22 0.43 0.02 23.75 5.55 4.30 0.00 11.00 1.31 0.49 0.02 24.00 5.57 4.32 0.00 11.25 1.43 0.58 0.03 11.50 1.58 0.69 0.04 11.75 2.16 1.16 0.19 12.00 3.69 2.54 0.49 12.25 3.93 2.76 0.07 12.50 4.09 2.91 0.04 12.75 4.21 3.02 0.03 Biofilter Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 27 Summary for Pond 2P: Biofilter Inflow Area = 0.080 ac, 75.00% Impervious, Inflow Depth > 4.32" for 10-Year event Inflow = 0.58 cfs @ 11.95 hrs, Volume= 0.029 of Outflow = 0.56 cfs @ 11.97 hrs, Volume= 0.026 af, Atten=4%, Lag= 1.0 min Primary = 0.56 cfs @ 11.97 hrs, Volume= 0.026 of Routing by Stor-Ind method, Time Span=0.00-24.00 hrs, dt=0.05 hrs Peak Elev=623.12' @ 11.97 hrs Surf.Area= 363 sf Storage= 175 cf Plug-Flow detention time=82.6 min calculated for 0.026 af(89%of inflow) Center-of-Mass det.time 30.1 min ( 816.2-786.0 ) Volume Invert Avail.Storage Storage Description #1 622.50' 606 cf Custom Stage Data(Prismatic) Listed below(Recaic) Elevation Surf.Area Inc.Store Cum.Store (feet) (so-ft) (cubic-feet) (cubic-feet) 622.50 203 0 0 623.00 327 133 133 624.00 620 474 606 Device Routing Invert Outlet Devices #1 Primary 618.15' 15.0" Round Culvert L=68.7' RCP, groove end projecting, Ke=0.200 Inlet/Outlet Invert=618.15'/615.75' S=0.0349'/' Cc=0.900 n=0.130, Flow Area= 1.23 sf #2 Device 1 623.00' 15.0"Horiz.Orifice/Grate C=0.600 Limited to weir flow at low heads Primary OutFlow Max=0.54 cfs @ 11.97 hrs HW=623.12' (Free Discharge) L1=Culvert (Passes 0.54 cfs of 1.92 cfs potential flow) L2=Orifice/Grate (Weir Controls 0.54 cfs @ 1.14 fps) Biofilter Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 28 Pond 2P: Biofilter f Hydrograph 0.65J ®Inflow ass cars( ❑Pnmary o.s a.s -inflow A1ea-0,G8O ac - 0.55= Peak?E ev 62;3. 2' 0.5_ `, 77 0.45= - Storage _ -c 0.,e' 0 0.357 , 0 0.3 0.25-, a 015- o1- 00:— y Wi: ra 4-: ",r> q r„,-r o r dAore 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) Pond 2P: Biofilter Stage-Discharge 624 p Primary a I m 7 w /. "Orifice/Grate 623 95 --7 0 1 2 Discharge (cfs) Biofilter Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 29 Pond 2P: Biofilter Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 50 100 150 200 250 300 350 400 450 500 550 600 1111 Surface.' " ' !. " ' !. ' . ' !: ' • ' !. ' ' ' ' ' ' ' ' ' - ' " • / " " i' : ' ' ' CI Storage . ., .. .. : de• 624 . . - ,. ,. ,. ., ,. .. .. „ .. , .. .. ,. .. „ •,. ,, „ .. . „ ., .. „ .. .. .. / . - ,. ., ,. . .. ,. .. .. .. .. eI ., .. 2 " ., ., ,/-f ., .. 15 ., ., .. ;-: 4:- , I tu , 6231' .. ,. „ .. ., ., .. .. .. . .. .. „ Custom Stage Data .- V , 0 50 100 150 200 250 300 350 400 450 500 550 600 Storage(cubic-feet) Biofilter Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 30 Hydrograph for Pond 2P: Biofilter Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 622.50 0.00 0.50 0.00 0 622.50 0.00 1.00 0.00 0 622.50 0.00 1.50 0.00 0 622.50 0.00 2.00 0.00 0 622.50 0.00 2.50 0.00 0 622.50 0.00 3.00 0.00 0 622.50 0.00 3.50 0.00 0 622.50 0.00 4.00 0.00 0 622.50 0.00 4.50 0.00 1 622.50 0.00 5.00 0.00 2 622.51 0.00 5.50 0.00 4 622.52 0.00 6.00 0.00 7 622.54 0.00 6.50 0.00 11 622.55 0.00 7.00 0.00 17 622.58 0.00 7.50 0.00 23 622.61 0.00 8.00 0.00 30 622.64 0.00 8.50 0.01 39 622.67 0.00 9.00 0.01 50 622.72 0.00 9.50 0.01 65 622.77 0.00 10.00 0.01 81 622.83 0.00 10.50 0.01 104 622.91 0.00 11.00 0.02 135 623.01 0.01 11.50 0.04 139 623.02 0.04 12.00 0.49 174 623.12 0.53 12.50 0.04 140 623.02 0.05 13.00 0.03 138 623.02 0.03 13.50 0.02 137 623.01 0.02 14.00 0.02 136 623.01 0.02 14.50 0.01 136 623.01 0.01 15.00 0.01 136 623.01 0.01 15.50 0.01 136 623.01 0.01 16.00 0.01 135 623.01 0.01 16.50 0.01 135 623.01 0.01 17.00 0.01 135 623.01 0.01 17.50 0.01 135 623.01 0.01 18.00 0.01 135 623.01 0.01 18.50 0.01 134 623.01 0.01 19.00 0.01 134 623.01 0.01 19.50 0.01 134 623.00 0.01 20.00 0.01 134 623.00 0.01 20.50 0.01 134 623.00 0.01 21.00 0.01 134 623.00 0.01 21.50 0.01 134 623.00 0.01 22.00 0.01 134 623.00 0.01 22.50 0.01 134 623.00 0.01 23.00 0.00 134 623.00 0.01 23.50 0.00 134 623.00 0.00 24.00 0.00 134 623.00 0.00 Biofilter Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 31 Stage-Discharge for Pond 2P: Biofilter Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) 622.50 0.00 623.02 0.04 623.54 1.98 622.51 0.00 623.03 0.07 623.55 1.98 622.52 0.00 623.04 0.10 623.56 1.99 622.53 0.00 623.05 0.14 623.57 1.99 622.54 0.00 623.06 0.19 623.58 1.99 622.55 0.00 623.07 0.24 623.59 1.99 622.56 0.00 623.08 0.29 623.60 1.99 622.57 0.00 623.09 0.35 623.61 1.99 622.58 0.00 623.10 0.41 623.62 1.99 622.59 0.00 623.11 0.47 623.63 2.00 622.60 0.00 623.12 0.53 623.64 2.00 622.61 0.00 623.13 0.60 623.65 2.00 622.62 0.00 623.14 0.67 623.66 2.00 622.63 0.00 623.15 0.75 623.67 2.00 622.64 0.00 623.16 0.82 623.68 2.00 622.65 0.00 623.17 0.90 623.69 2.00 622.66 0.00 623.18 0.98 623.70 2.01 622.67 0.00 623.19 1.06 623.71 2.01 622.68 0.00 623.20 1.15 623.72 2.01 622.69 0.00 623.21 1.24 623.73 2.01 622.70 0.00 623.22 1.33 623.74 2.01 622.71 0.00 623.23 1.42 623.75 2.01 622.72 0.00 623.24 1.51 623.76 2.02 622.73 0.00 623.25 1.61 623.77 2.02 622.74 0.00 623.26 1.70 623.78 2.02 622.75 0.00 623.27 1.80 623.79 2.02 622.76 0.00 623.28 1.90 623.80 2.02 622.77 0.00 623.29 1.94 623.81 2.02 622.78 0.00 623.30 t95 623.82 2.02 622.79 0.00 623.31 1.95 623.83 2.03 622.80 0.00 623.32 1.95 623.84 2.03 622.81 0.00 623.33 1.95 623.85 2.03 622.82 0.00 623.34 1.95 623.86 2.03 622.83 0.00 623.35 1.95 623.87 2.03 622.84 0.00 623.36 1.95 623.88 2.03 622.85 0.00 623.37 1.96 623.89 2.03 622.86 0.00 623.38 1.96 623.90 2.04 622.87 0.00 623.39 1.96 623.91 2.04 622.88 0.00 623.40 1.96 623.92 2.04 622.89 0.00 623.41 1.96 623.93 2.04 622.90 0.00 623.42 1.96 623.94 2.04 622.91 0.00 623.43 1.97 623.95 2.04 622.92 0.00 623.44 1.97 623.96 2.05 622.93 0.00 623.45 1.97 623.97 2.05 622.94 0.00 623.46 1.97 623.98 2.05 622.95 0.00 623.47 1.97 623.99 2.05 622.96 0.00 623.48 1.97 624.00 2.05 622.97 0.00 623.49 1.97 622.98 0.00 623.50 1.98 622.99 0.00 623.51 1.98 623.00 0.00 623.52 1.98 623.01 0.01 623.53 1.98 Biofilter Type 1124-hr 10-Year Rainfall=5.57" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Pace 32 Stage-Area-Storage for Pond 2P: Biofilter Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 622.50 203 0 623.54 485 352 622.52 208 4 623.56 491 362 622.54 213 8 623.58 497 371 622.56 218 13 623.60 503 381 622.58 223 17 623.62 509 392 622.60 228 22 623.64 515 402 622.62 233 26 623.66 520 412 622.64 238 31 623.68 526 423 622.66 243 36 623.70 532 433 622.68 248 41 623.72 538 444 622.70 253 46 623.74 544 455 622.72 258 51 623.76 550 466 622.74 263 56 623.78 556 477 622.76 267 61 623.80 561 488 622.78 272 67 623.82 567 499 622.80 277 72 623.84 573 511 622.82 282 78 623.86 579 522 622.84 287 83 623.88 585 534 622.86 292 89 623.90 591 545 622.88 297 95 623.92 597 557 622.90 302 101 623.94 602 569 622.92 307 107 623.96 608 581 622.94 312 113 623.98 614 594 622.96 317 120 624.00 620 606 622.98 322 126 623.00 327 133 623.02 333 139 623.04 339 146 623.06 345 153 623.08 350 160 623.10 356 167 623.12 362 174 623.14 368 181 623.16 374 189 623.18 380 196 623.20 386 204 623.22 391 212 623.24 397 219 623.26 403 227 623.28 409 236 623.30 415 244 623.32 421 252 623.34 427 261 623.36 432 269 623.38 438 278 623.40 444 287 623.42 450 296 623.44 456 305 623.46 462 314 623.48 468 323 623.50 474 333 623.52 479 342 Biofilter Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 33 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 Subcatchment 1S: Area to Biofilter Runoff Area=0.080 ac 75.00% Impervious Runoff Depth>7.80" Tc=5.0 min CN=89 Runoff=1.01 cfs 0.052 af Pond 2P: Biofilter Peak Elev=623.18' Storage=196 cf Inflow=1.01 cfs 0.052 af Outflow=0.98 cfs 0.049 af Total Runoff Area=0.080 ac Runoff Volume=0.052 af Average Runoff Depth=7.80" 25.00%Pervious=0.020 ac 75.00%Impervious=0.060 ac Biofilter Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 sin 06538 ©2013 HydroCAD Software Solutions LLC Page 34 Summary for Subcatchment IS: Area to Biofilter [49] Hint: Tc<2dt may require smaller dt Runoff = 1.01 cfs @ 11.95 hrs, Volume= 0.052 af, Depth> 7.80" 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 100-Year Rainfall=9.14" Area (ac) CN Description 0.020 61 >75% Grass cover, Good, HSG B 0.060 98 Paved parking, HSG B 0.080 89 Weighted Average 0.020 25.00% Pervious Area 0.060 75.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment IS: Area to Biofilter Hydrograph / ❑ Jule , omj Type II 24-hr ✓ 100-Year Rainfa11 9.i4" Runoff Area=0.080 ac Runoff VoIUme*0.O5 of - Runoff Depth>7.80" Tc=5.0 min CN=89 0 /rm- 40/0/424., o 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16-17"16"19" 0"21-22-23 2 24 Time (hours) Biofilter Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 35 Hydrograph for Subcatchment 1S: Area to Biofilter Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 13.00 7.06 5.76 0.05 0.25 0.02 0.00 0.00 13.25 7.19 5.89 0.04 0.50 0.05 0.00 0.00 13.50 7.30 6.00 0.04 0.75 0.07 0.00 0.00 13.75 7.40 6.10 0.03 1.00 0.10 0.00 0.00 14.00 7.49 6.19 0.03 1.25 0.12 0.00 0.00 14.25 7.58 6.27 0.03 1.50 0.15 0.00 0.00 14.50 7.66 6.35 0.02 1.75 0.17 0.00 0.00 14.75 7.73 6.42 0.02 2.00 0.20 0.00 0.00 15.00 7.80 6.49 0.02 2.25 0.23 0.00 0.00 15.25 7.87 6.56 0.02 2.50 0.26 0.00 0.00 15.50 7.93 6.62 0.02 2.75 0.29 0.00 0.00 15.75 7.99 6.68 0.02 3.00 0.32 0.00 0.00 16.00 8.04 6.73 0.02 3.25 0.35 0.01 0.00 16.25 8.10 6.78 0.02 3.50 0.38 0.01 0.00 16.50 8.15 6.83 0.02 3.75 0.41 0.02 0.00 16.75 8.19 6.88 0.02 4.00 0.44 0.03 0.00 17.00 8.24 6.92 0.01 4.25 0.47 0.03 0.00 17.25 8.29 6.97 0.01 4.50 0.50 0.04 0.00 17.50 8.33 7.01 0.01 4.75 0.54 0.06 0.00 17.75 8.38 7.06 0.01 5.00 0.58 0.07 0.00 18.00 8.42 7.10 0.01 5.25 0.61 0.08 0.00 18.25 8.46 7.14 0.01 5.50 0.65 0.10 0.01 18.50 8.50 7.18 0.01 5.75 0.69 0.12 0.01 18.75 8.53 7.21 0.01 6.00 0.73 0.14 0.01 19.00 8.57 7.25 0.01 6.25 0.77 0.16 0.01 19.25 8.61 7.28 0.01 6.50 0.82 0.18 0.01 19.50 8.64 7.31 0.01 6.75 0.86 0.20 0.01 19.75 8.67 7.35 0.01 7.00 0.90 0.23 0.01 20.00 8.70 7.38 0.01 7.25 0.95 0.26 0.01 20.25 8.73 7.40 0.01 7.50 1.00 0.28 0.01 20.50 8.76 7.43 0.01 7.75 1.05 0.31 0.01 20.75 8.79 7.46 0.01 8.00 1.10 0.35 0.01 21.00 8.82 7.49 0.01 8.25 1.15 0.38 0.01 21.25 8.85 7.52 0.01 8.50 1.21 0.42 0.01 21.50 8.87 7.55 0.01 8.75 1.27 0.47 0.01 21.75 8.90 7.57 0.01 9.00 1.34 0.52 0.02 22.00 8.93 7.60 0.01 9.25 1.42 0.57 0.02 22.25 8.96 7.63 0.01 9.50 1.49 0.62 0.02 22.50 8.98 7.65 0.01 9.75 1.57 0.68 0.02 22.75 9.01 7.68 0.01 10.00 1.65 0.75 0.02 23.00 9.04 7.71 0.01 10.25 1.75 0.83 0.03 23.25 9.06 7.73 0.01 10.50 1.86 0.92 0.03 23.50 9.09 7.76 0.01 10.75 1.99 1.02 0.04 23.75 9.11 7.78 0.01 11.00 2.15 1.15 0.04 24.00 9.14 7.81 0.01 11.25 2.34 1.32 0.06 11.50 2.59 1.53 0.07 11.75 3.54 2.39 0.36 12.00 6.06 4.79 0.85 12.25 6.45 5.18 0.12 12.50 6.72 5.43 0.08 12.75 6.90 5.61 0.06 Biofilter Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 36 Summary for Pond 2P: Biofilter Inflow Area = 0.080 ac, 75.00% Impervious, Inflow Depth > 7.80" for 100-Year event Inflow = 1.01 cfs @ 11.95 hrs, Volume= 0.052 af Outflow = 0.98 cfs @ 11.96 hrs, Volume= 0.049 af, Atten=3%, Lag=0.8 min Primary = 0.98 cfs @ 11.96 hrs, Volume= 0.049 af Routing by Stor-Ind method, Time Span=0.00-24.00 hrs, dt=0.05 hrs Peak Elev=623.18' @ 11.96 hrs Surf.Area= 380 sf Storage= 196 cf Plug-Flow detention time=57.5 min calculated for 0.049 af(94%of inflow) Center-of-Mass det. time 24.2 min ( 794.5-770.3 ) Volume Invert Avail.Storage Storage Description #1 622.50' 606 cf Custom Stage Data(Prismatic) Listed below(Recaic) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 622.50 203 0 0 623.00 327 133 133 624.00 620 474 606 Device Routing Invert Outlet Devices #1 Primary 618.15' 15.0" Round Culvert L=68.7' RCP, groove end projecting, Ke=0.200 Inlet/Outlet Invert=618.15'/615.75' S=0.0349'/' Cc=0.900 n=0.130, Flow Area= 1.23 sf #2 Device 1 623.00' 15.0"Horiz.Orifice/Grate C=0.600 Limited to weir flow at low heads Primary OutFlow Max=0.95 cfs @ 11.96 hrs HW=623.18' (Free Discharge) 1-1=Culvert (Passes 0.95 cfs of 1.93 cfs potential flow) L2=Orifice/Grate (Weir Controls 0.95 cfs @ 1.37 fps) Biofilter Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 37 Pond 2P: Biofilter Hydrograph LIE Inflow I i 1.oi crs l - O Primary owcsi Inflow Area--0.080 ac Peak Elev=623.18' illi Storage=196 cf rt 0 Er LI _, 7,,,,.:1. ft 4 1 /,';'''*/#.1 ,4 3.c... ��,:i �,�,�:#1.•�.,e`%%ii%%r r��irim.%�:%ir%i%%.fir .,..�ii%% %��.44 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) Pond 2P: Biofilter Stage-Discharge 624 f LEI Primary 1 li w Amp 0 _m w /210111r Orifice/Grate 623 % al 0 1 2 Discharge (cfs) Biofilter Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 38 Pond 2P: Biofilter Stage-Area-Storage Surface/Horizontal/Wetted Area(sq-ft) 0 50 100 150 200 250 300 350 400 450 500 550 600 11 Surface . l . 0 Storage 624 �� �w % c in • 623-" ;; Custom Stage Data 0 50 100 150 200 250 300 350 400 450 500 550 600 Storage(cubic-feet) Biofilter Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 39 Hydrograph for Pond 2P: Biofilter Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 622.50 0.00 0.50 0.00 0 622.50 0.00 1.00 0.00 0 622.50 0.00 1.50 0.00 0 622.50 0.00 2.00 0.00 0 622.50 0.00 2.50 0.00 0 622.50 0.00 3.00 0.00 1 622.50 0.00 3.50 0.00 3 622.51 0.00 4.00 0.00 7 622.53 0.00 4.50 0.00 12 622.56 0.00 5.00 0.00 19 622.59 0.00 5.50 0.01 27 622.63 0.00 6.00 0.01 38 622.67 0.00 6.50 0.01 50 622.72 0.00 7.00 0.01 64 622.77 0.00 7.50 0.01 80 622.83 0.00 8.00 0.01 98 622.89 0.00 8.50 0.01 118 622.96 0.00 9.00 0.02 136 623.01 0.02 9.50 0.02 136 623.01 0.02 10.00 0.02 137 623.01 0.02 10.50 0.03 138 623.02 0.03 11.00 0.04 140 623.02 0.04 11.50 0.07 143 623.03 0.07 12.00 0.85 193 623.17 0.92 12.50 0.08 144 623.03 0.08 13.00 0.05 140 623.02 0.05 13.50 0.04 139 623.02 0.04 14.00 0.03 138 623.02 0.03 14.50 0.02 137 623.01 0.02 15.00 0.02 137 623.01 0.02 15.50 0.02 137 623.01 0.02 16.00 0.02 136 623.01 0.02 16.50 0.02 136 623.01 0.02 17.00 0.01 136 623.01 0.02 17.50 0.01 136 623.01 0.01 18.00 0.01 136 623.01 0.01 18.50 0.01 136 623.01 0.01 19.00 0.01 135 623.01 0.01 19.50 0.01 135 623.01 0.01 20.00 0.01 135 623.01 0.01 20.50 0.01 135 623.01 0.01 21.00 0.01 135 623.01 0.01 21.50 0.01 135 623.01 0.01 22.00 0.01 135 623.01 0.01 22.50 0.01 135 623.01 0.01 23.00 0.01 135 623.01 0.01 23.50 0.01 135 623.01 0.01 24.00 0.01 135 623.01 0.01 Biofilter Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 40 Stage-Discharge for Pond 2P: Biofilter Elevation Primary Elevation Primary Elevation Primary (feet) (cfs) (feet) (cfs) (feet) (cfs) 622.50 0.00 623.02 0.04 623.54 1.98 622.51 0.00 623.03 0.07 623.55 1.98 622.52 0.00 623.04 0.10 623.56 1.99 622.53 0.00 623.05 0.14 623.57 1.99 622.54 0.00 623.06 0.19 623.58 1.99 622.55 0.00 623.07 0.24 623.59 1.99 622.56 0.00 623.08 0.29 623.60 1.99 622.57 0.00 623.09 0.35 623.61 1.99 622.58 0.00 623.10 0.41 623.62 1.99 622.59 0.00 623.11 0.47 623.63 2.00 622.60 0.00 623.12 0.53 623.64 2.00 622.61 0.00 623.13 0.60 623.65 2.00 622.62 0.00 623.14 0.67 623.66 2.00 622.63 0.00 623.15 0.75 623.67 2.00 622.64 0.00 623.16 0.82 623.68 2.00 622.65 0.00 623.17 0.90 623.69 2.00 622.66 0.00 623.18 0.98 623.70 2.01 622.67 0.00 623.19 1.06 623.71 2.01 622.68 0.00 623.20 1.15 623.72 2.01 622.69 0.00 623.21 1.24 623.73 2.01 622.70 0.00 623.22 1.33 623.74 2.01 622.71 0.00 623.23 1.42 623.75 2.01 622.72 0.00 623.24 1.51 623.76 2.02 622.73 0.00 623.25 1.61 623.77 2.02 622.74 0.00 623.26 1.70 623.78 2.02 622.75 0.00 623.27 1.80 623.79 2.02 622.76 0.00 623.28 1.90 623.80 2.02 622.77 0.00 623.29 1.94 623.81 2.02 622.78 0.00 623.30 1.95 623.82 2.02 622.79 0.00 623.31 1.95 623.83 2.03 622.80 0.00 623.32 1.95 623.84 2.03 622.81 0.00 623.33 1.95 623.85 2.03 622.82 0.00 623.34 1.95 623.86 2.03 622.83 0.00 623.35 1.95 623.87 2.03 622.84 0.00 623.36 1.95 623.88 2.03 622.85 0.00 623.37 1.96 623.89 2.03 622.86 0.00 623.38 1.96 623.90 2.04 622.87 0.00 623.39 1.96 623.91 2.04 622.88 0.00 623.40 1.96 623.92 2.04 622.89 0.00 623.41 1.96 623.93 2.04 622.90 0.00 623.42 1.96 623.94 2.04 622.91 0.00 623.43 1.97 623.95 2.04 622.92 0.00 623.44 1.97 623.96 2.05 622.93 0.00 623.45 1.97 623.97 2.05 622.94 0.00 623.46 1.97 623.98 2.05 622.95 0.00 623.47 1.97 623.99 2.05 622.96 0.00 623.48 1.97 624.00 2.05 622.97 0.00 623.49 1.97 622.98 0.00 623.50 1.98 622.99 0.00 623.51 1.98 623.00 0.00 623.52 1.98 623.01 0.01 623.53 1.98 Biofilter Type 1124-hr 100-Year Rainfall=9.14" Prepared by Microsoft Printed 2/16/2015 HydroCAD®10.00 s/n 06538 ©2013 HydroCAD Software Solutions LLC Page 41 Stage-Area-Storage for Pond 2P: Biofilter Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 622.50 203 0 623.54 485 352 622.52 208 4 623.56 491 362 622.54 213 8 623.58 497 371 622.56 218 13 623.60 503 381 622.58 223 17 623.62 509 392 622.60 228 22 623.64 515 402 622.62 233 26 623.66 520 412 622.64 238 31 623.68 526 423 622.66 243 36 623.70 532 433 622.68 248 41 623.72 538 444 622.70 253 46 623.74 544 455 622.72 258 51 623.76 550 466 622.74 263 56 623.78 556 477 622.76 267 61 623.80 561 488 622.78 272 67 623.82 567 499 622.80 277 72 623.84 573 511 622.82 282 78 623.86 579 522 622.84 287 83 623.88 585 534 622.86 292 89 623.90 591 545 622.88 297 95 623.92 597 557 622.90 302 101 623.94 602 569 622.92 307 107 623.96 608 581 622.94 312 113 623.98 614 594 622.96 317 120 624.00 620 606 622.98 322 126 623.00 327 133 623.02 333 139 623.04 339 146 623.06 345 153 623.08 350 160 623.10 356 167 623.12 362 174 623.14 368 181 623.16 374 189 623.18 380 196 623.20 386 204 623.22 391 212 623.24 397 219 623.26 403 227 623.28 409 236 623.30 415 244 623.32 421 252 623.34 427 261 623.36 432 269 623.38 438 278 623.40 444 287 623.42 450 296 623.44 456 305 623.46 462 314 623.48 468 323 623.50 474 333 623.52 479 342