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HomeMy WebLinkAboutWPO201100089 Plan - Stormwater 2012-01-17 L�.il..I." 111.11.M.MtP"' --- -11=PIALW \ N N N \ \ • \ \ -ii y up% S \ Re a\te '• ft. \.\\3'6' c(AIL: \ \11A SW�� em �t� \ __ 7—Allbi------—--———————---====__________________________ 0 lb,Z 4-N iiii.zi=.•_;.,:_i_t \lib. MI— — Z:Z.4" li \ tik \ \ . \ \ \ li , ,,,Naiiiii* 1 4144% \ r _ ,!.. I /� 1 _ , I ♦ C• - - : t•_ _ - - DPE -_ j= - 87 a Bollard _ 4\ \\ \ Nii, 1 1a►a�i7‘\ • R \A��. \ \\ I o •• • 386.94 386.99 —•• 87.00 , ll \\ \ \ 'Ent • i Yl\V../E C2 1 1 \\ ... ..... ... , , ,....., \ , , to extende4 \ "- li ::,. ,-.N;.\-vk 1 .' -'- - -'3' - - - - p oi ; \\Ts ► .. , ski ''' k'si," \ d - ten eon r o\�d • In 2. 7 • U w . IP . .05 ,• . — Inv :=09 Inv 383.� . AC. / 7 ' II �, .,, A \ `, \ \ Q � •• . • F — i_ 11* * 1 .. 1 'dal : �` \ \ \\ \\ c 8 P �_ 7.37 III, �1*�'::.: �• \\.,, \ \\ \\ ,Il 11164 nimimmr. 'NIIV '‘‘IIV . \. 1 1\1 i JAM 0 '•,.*.' ) \ \ rs :43 w' v,;. 4a2 :.�� mqe i ISM• \ \ at.�.ie 387.39 _ 1 1 p�. ��:1C rim, . V��� e �. I \ \ \ /611/ ) . — • i1. !' ��. to _ - ~i • !— _ i‘k .,:\ i . ines MH , ••a. 3::, a • , .ra e - iii i _ �;- � i �/ I -2. 41 fir ';‘. 1 i 41 11 i 1.1!)...,., ifc.k...., it �� 387.40 — \t, �' I/���,����Tio► ,‘ Ill . .,� \ 3s \ 5 / \. i\ my4i 387.44 FF r WIMIIII=m11 I=1=imm slam yH �\ 1 ��.•• �� �1 �` ' .� \ \ 0 — 387.39 FF 387.40 lias73i8s382 4 . . :. �� '='A.Lk�yl`� -�`� � ' \ \ / \ 1 atom qrate II 377.32\ 1 ;e- - "7 �, a 14Z \ \Ir` ;a \\ 0\ 1 btap 388.17l0 37s._ s� '�' •r►\ `: ``� �. '�\ /`� Staekabe`�� Inv 3ti3.42 _ — - • .. �. _ i`'��� \� l , �,sii ♦u — — — e� atomg Cry — —� - - - — — — — u — — — — — �j _ %��'�t, \\ \ 77 ` �'.\ / \ top388 a s mumpriiip.. — — — — � _ ,:- ../ \\ ,i \ / \ \ -.-,; \\\\ \ Adial•L 41 —•. FFar � �i \ ` .�a� \". \ \ — �ss� �� sus — I , \ \� • • \; 1;1111 A \\�— .�.� ....... ..ra ; \\�.� � � �— FF4 wan Alb* Q !►\\� \ /\� 407.45la FF .jZ .I \ \t.8,\,' j< 1�� !:e�+ etartn rate 407.41 \ \\\\ \�. G�:� ���`; • \ I��..e� `� In v 403.84 ® Ex.1?RCP ,- -\� \ \ \ \ , �,ll,\: ..�i'f'��i�y'�'�' � Sr r ���i 'r slam ats `�`li / \ \ \\\\\ \\ \ .. _..s `�.00�4 ` ��, olor lav 403Ai = \ \ \\ IN 4. l:. v.r \. 407.33 FF 407.34 • 407.33 �$ a `kirk • 1 j/ �� • \e-\\\N NN \ 4 \\\ \\\ \\ \, \ , t� I� \ This Drawing is a scaled version of Charlottesville Self Storage Base Plans by The Cox Co. Sheet C-3.0 Stormwater Drainage Plan of Stormwater Management Amendment 2011 and RGA & Assoc. Used by permission. Charlottesville Self Storage - Minor Site Plan Amendment TCS Engineering Co. LLC by The Cox Co. (last rev. 11-17-06) 1"=50' Rev. Dec. 6, 2011 Ph. 434-361-1215 Job No. 11-017 'Tle' rC i m LL APPROVED by the Alriomarle County k.r„nmwr,;iy Deve; rre �,r nt Depa,-trtic Up-/R.0a Amended _W , of I-opogq------_ Stormwater Quality Management Facility fbr Charlottesville Self Storage County of Albemarle, Virginia Abstract: Over recent years, biofilters have become costly and high maintenance structures. It is the intent of the owners of this property, in converting their water quality facility, to utilize a different design. The selection here of an extended detention dry pond will accomplish the intent of the original design and minimize the additional disturbance to the site. A. Current Site situation B. Selection of new Water Quality enhancement C. Erosion Control Approach D. Drainage Area Data E. Selection of Water Quality Volume and Design Storm Event F. APPENDIX 1: Current Topographic Map (From RGA&Assoc.) G. APPENDIX 2: Amended E&S Plan(including Proposed Grading and Improvements) H. APPENDIX 3: County Hydraulic &Hydrologic Routings �vp,LTH//;Op L • r • L. 4gart • No. 022841 • 'f0 07DEC2011 Revised: December 7,2011 `r'SIO L S43\ TCS Job No. 11-017 NA 741 Duncan Hollow Loop Faber, VA 22938 Ph.434/361-1215 Email: JTagg2@AOL.com • En i rin A.Current Site Situation: The project has been amended several times; most recently in 2006. There are still improvements to buildout the project to its full site plan. The stormwater runoff is currently directed to an area with two sediment trap structures. The largest tributary storm sewers bypass these silt traps by a Clearwater diversion between the traps. (See appendix 1) The County has asked that the conversion to the permanent stormwater facility(Biofilter)be accomplished. B. Selection of New Water Quality enhancement It is the intent of the owners of this property, in converting this facility,to utilize a different design to minimize both disturbance to a stabilized area and costs. To that end,we have opted to convert the current basin areas to an extended detention dry pond by adding some additional grading and an outlet structure. The change from biofilter to extended detention dry pond is the purpose of this amendment. C. Erosion Control Approach The disturbed area of the project measures to be approximately 25,000 s.f. Therefore, a simple amendment to the existing erosion control plan or land disturbance permit is required. An E&S amendment drawing has been prepared accordingly. D. Drainage Area Data The current approved design shows drainage areas and storm sewer designs for some 8.88 ac. (See The Cox Co. Minor Site plan amendment sheet No. C-3.0 dated 11-17-06). For the purposes of this project, routings have been developed which utilize 9.16 ac. of tributary area from the storm sewer as well as 1.17 ac. of area covering the pond itself. E. Selection of Water Quality Volume and Design Storm Event The water quality volume for the impervious area would be something approaching 476 c.y. The County Engineering Dept. has prepared a routing and storage design for this revision. This . F. APPENDIX 1: Current Topographic Map (From RGA & Assoc.) (See attached) G. APPENDIX 2: Proposed Grading plan and Riser details (per County approach) (See attached) H. APPENDIX 3: Routings from County Engineering (See attached) 741 Duncan Hollow Loop Faber, VA 22938 Ph.434/361-1215 Email: JTagg2@AOL.com it. U I hr SEI.e] _ ramW iow> TOPO OF EXISTING CONDITIONS a n;,, AT SWM BASIN NN ,,', %�`n AS FIELD LOCATED ON 8 18 11 N CHARLOTTESVILLE SELF STORAGE FlA TANK ' i' IV mi't��- n Source: Roudabush Gale & Assoc. 9uat 1.0 W4119 378 }c_10 44) Stormw seam ex 374 ,n 386 �,� 365- \io-an. 3j0 *:* Liall2°1X. ; 0 #* "11111'1: 4 •� imilik. I164 366 _�360 4ti•• asse •}4' • iP H 376 ' 376 -370 ,c, 41. -366 -366 ' I I o o i `./1 I /\ I 000reo � �. .__, 00i -tioo .� 366 , • 364 3 ...— .�I./ ,,, • 31U— y S, 7 Ike S.� +r,,A 0 *A 6' �•:4 u, 4k. `1-"- i', ......__--mtaia////fAbh. . IIIIIS f7.4.123......4 w ; O / , Ia.. t �•O• be•i•••1►••••• -604. IIIIII 40011111111109:404•14 I iNiite of,•••••,•••••2 „, . ,.........,, ....,„ ,...._. ... , s (i) • -', 12"HDPE. A, ii,k, . ' .'•••••.. ��ii!%r. I1.=380.20 ....op- , .04 h. i.�.� 5c, �I'� frIP(oe. /' 4... .••••.••.•- •.• '. .. 4 . • its •f C. s t. :� �4104: 00 .'oi•�4.;� 52 / .� �, APE.• ••�• • ' � • • v. .. • 35• .04400.6.% �• Pam. • e •• eat ‘ 6,,,,s. �o ‘ Ar� • ••, / ti riD � v � �� •/7 431� +\N90� �� � • Limits o f Const.s�o I.. . .- • • �:. 356 V � -= r •y-�I / / " op :fi : : -Cz) •4 P4:..:* 4• 0 1 e ./. u, 6-, PIFF , • 1.=35 •• ° / 4 �� SS . / , 4" I" I high rip-rap weir CQrlottes`- ,,- i of 6" dia. rip-rap as 4,9 o ./ sediment fore.• . Self a'=` .A. '? . #, ' •65 chd�n link fence 5 �� 6 Permanent Vehicle S t W , t e r ,5 (L �� o 7e) ' Access to be VQrQge �'lent '55 �� provided along 'S ,_i • this route subject Pon () to approval by ei ' , County inspector. // '�q n . ,cToro (i^ 5) a„.4i‘ _de , 12',DfA. oTt N/N4 0, c Erosion � ar O tIllitik(ED '/ 'S�� Low flow channel �• '��`ff �""'^1`,�`"''"`�"'' 0 C o n t r o l P Q Wes^ Ar� enc r� en 11 I73.1 i _ _ susS ._ +% �•ir, ._ • Outfall pipe extended to daylight I„/„/ . .. \ II •dequate channel •VC. .3•!i .� » `� Y,SnNG Ql are to be addressedal) 12 ADS N-12 1.5� ism ` ° .� Dec. 6, 20 1'= Sheet 1 of 1 rV.� e�,� Riser= Agridrain Hickenbottom Intake It -� o 0 by a levet' spreader at 64•�4i .116 . the outlet`: WAN r•/ (perforated Riser) inside of Concrete , - -a:1Iw1 �z� N.'Z'°�s -- �. . •� . .- 1s� o TCS En ' ringCo.,L.L.C. .�!.,• �• DI-box with 12x12" grated top inlet r� , a, c •- at tie .. 12' x 35' total height) (See 3"'0g1 a EL 3�8•d 0 w @li S d, VA discretion of theip fr 9 ) detaill) !a �, � wnr! seR ' County Inspector. era �1T$ EN( �: _ -361 - 1 rJ -37,..-s rccTlvNI. (y-,*s) T T it u It"4rA. OTeMAI* C wrrO 7e KEE A/ 7 'y _�-- o a'� "31Z.s re.y�KY,ay YiLL•�wTiaf� U O TQp of D1�53.5 ,,..,W TOPO OF EXISTING CONDITIONS ,0 5 stiff.SP ury wt nm - a3safo 's - n - i/ CO{Q _T, >,. AT SW BASIN j �� C� AS FIELD LOCATED ON 8/18/11 `— ,- O D 0 , ` Q CHARLOTTESVILLE SELF STORAGE il _r �. o' 4:,0`� Source: Roudabush Gale do Assoc. of ads '16 � Cn 173 C n 1 1' ; \ . 0 'N ,J,� Fg II - .Aii,' III . .t2� w,:wes !:1 = c �_�. Imo... 1.52 - o • / • '�t� I rc4 r ,c 1, ate sro 4- j 3,, orcifi40 Ft 318.0 "� IE driNiii& Wl1'il ere'cup—E : - -: stz yeA - 44" • �..-.,., ��• 370 �- - IP ev. 10JAN2012 Per Alb. Co. comments �� 'r�,,,..,711111.,,,,;,:..i;.7;—:::71—...mmil;.$32.,,,,,......bb- ./ y � ::�� .� V -\ 1? . :". fr. „..„,.. • s ���rmane___________________2c - - 44 40) 01.41., . •dit,••• . 71101!I)''' 1 -• i • • 4„,ate ' ,-, . . •,e_.. • g , #• ��, , It; . route subject sm_______y 43 ,.V *.-0; i 4 C, to approval by 7, 2 ,,, r• County inspector. -xi —x, ` ar innudation -36` op 3� shaded area) -- 4,4 •• •, 0....--- 0� �.; '•/ Appendix 2A � •utfall pipe extended to daylight �� �j . ,• _'�I 12 ADS N-12 © 1.5% Proposed 0 \ ti ... Riser= ADS N-12 with screen top, strapped to inside of Concrete DI—box with I m p r o v e l e r t 352 12x12" grated top inlet 72" total height incl 6" base) (See detail) Dec. 6.2011 Oft N. t * rAt Val ....--• .•—`""' TOPO OF EXIS11NG CONDI11ONS N.ti off, AT SWM BASIN „--f' AS FIELD LOCATED ON 8/18/11 1 CHARLOTTESVILLE SELF STORAGE * • dequate c . . _re to be addressedSource Roudabush Gale Assoc b► a level" r= • = he outlet, or a channel, �,v •t the discrete f the county ins t_o�r. `'' x `L / -01• ' f, 378 it- Slam IN -..‘4'''' 41 Vir''311. — ...ots0.1111.1111■6"01 -10:400:031111°11.1t*,4t: migolen i:.•:::4111311111iP 1:1;.St;. l.dreAlgror;,..7. -r......„mme' 0,-,... ►-',...;•7;,:::.:y,:...............__,,,,--________.-----. , ,,A3t...t:„...40,17,,..•.....,.........,_.. ..:..._„„ ., .....„0„.. ,,;;011.1.0,...„:„.....,,.. ...... ....... 7 , ...sr fi i (r.,,, IF- ---i ,,• 00. -....00. #.....'c ‘1,› Y -A.3 . 4'44,11, N 44,_ 1 .440.>„:,- ..- .---- . - ..1, 365 ___ __,_____y 0000 '�/'�..-' e. - -•e• along this route, s� . .%;5 4* A • _ u•j ect to approval by 374 � . . ' county inspector. 3 88 ` f' 'ar i • dation—NA • shaded area Rip-rap or gabi4• e n o i x 101. A �+_isit' .. . basket weir to pro .f • • ,m tLow flow channel forebay -typ. �., 0 L.F. 12 ADS N-12 Q 1.5% f_ ' Ir� 9rov ents /� N10'4- :; 1 Riser= Agridrain Hickenbottom Intake ''" (perforated Riser) 12" x 35" total height) (See detail *6 w. . �° extenc&p Apt delight * , �� = 5 0 } : ,r,..,,,.„;,,,,,.., :,.... \:,.. ,c,„1.(2 5,...;;,... „.:. .......,.,..:::,.. .,, ;16),,i,..j,,,,...:,,,,,,,,,,,,..H..A.,.,:, t,,,,,,,,,....n...... .:, .0,1.. ...,..,.xi::,:ii„,,..,,„. .„.,...,...___„: .. „.._;,,,, .i..,.. _77:1....,:::.,,. i C' cc'1Q4 , L w 4 ices - • iil� irr . w .o- . i . � 7 $ 3 TP t � 'tw . ( EL 3Z• - !r ts�r\ JS 'i[R.N. w , : , i �C Yr :i f ri 3�3 4 . c +„ ' . EN t •t , r4t f ..b.�t1 : , - ' / i it yy1'.f.1 r e4 „ '#4S` ,_ \ i� F. —44I1fik:.... . ---sue" i 24 Lk; '�L �C/rNAirrei I � J - V I�,YI ► - . 'k-. - ?" Tf; +. } ;y�.1 jt 7. }'M. .. ^Px, s'1.• . E tiff rrg : : -�� r `f rre4cez , fr' I Y #. it yat yc Sy - ,a .ler Computations For Worksheets 2-6 (e Method Comp Modified Simple aria n CountyBM Devel_pmgnt area_r-•----- �rie Water Protection Ordinance: Water Resources Area: -'- Charlottesville Self Storage - 06 ----. Date: 11�- - _ "" __ -. Whole Site_..----•—_"-___.,.�- t------Th Area Designation Ct DrainageL=(P(9(1) 12]I C(A)2.72) R006 in pounds, +0.009(I)storm pollutant export p•05 Piori mean runoff coefficient, Rv-0.9 � �, small storm correction factor, percent imperviousness43 bemarle -`�"14.92] 43"in AI A=�--- annual precipitation, subject drainage area, bonus project factorarea in acres in s�b n or ppm target phosphorus pollutant concentration, 9area= A(t3560(0•5112�27 -; applied t°RR cy,0.5"over imperv• required treatment volume{)in x L(pre) oval, L(post) _ --- -`..- t required rem RR1001L(post) �__- __.-- 2R removal efficiency, oars feet) ---`"`~-- - - -- Ar)a_ .,9 u{at-n(values in feet&sg,----.--..-._`•---f -------'n Width�- sub o at t I Cover Come_,._---- -- . - - �'�post-develop e_ 30053 {' r�ervious ---- _ _ -- ''- 198118 r'. "_``-Le� subtotal 18606 k veto ment.__--•_.._--•-'--~'"".� Nlidlh ---•'-""-Oi subtotal re-de P. Len$.__ _•- 0 �a : :Dads 166065- 166085 Len•th Width nO' 3 4 0 ri subtotal 0 2 , Width no. 1 ;�g $ Len ......--__ 4 F-._------r--"`• r � � � Driveways -�� 3 0 0 ` rt r $'� � '' and walks 1 - _ Area 0 x 0.70= Sri" a l�, S 1 �; --"-ots --- r- `---ram subtotal i F , Parking L 0 '1- Vier,- 11 ; Area _ no. 3 30090 's` "t :s, �a F t ,. • -� - Area 0 x 0.7 �- `� 10030 10785 'f::kw w sr e Gravel areas subtotal \ 1 \.. ----- -- Arise .---now - 3 total39-o 10T65� - 13585 t:'�." . ; -r-+ 30 - 10785 I` 531 65 _ 1 - 28000 �g{ructures 13000— 1\ 20002606 _--- �._.___-- -- 1 -- --'- 14206 --- 8163 - 26 6�� 1 21301` 8163 ---- 7056 ----' ----� 1 7056 0 112491 83066 _--- Area - 0 -- r - Ix0.08= 0 se&Are_____ -, Lam_== x 0�2r�—�- Act}vely-9razed Pasta r �x�s: --- ._._•• 0. 47% cultivated turf Art- e 0 -------_- 0 Area ardsv '-"' 0 t(post) Active crop land Area 0.25= __•_-.--.._-- lmpOthe Irr�P•US Cover t(pre) Impervious Cover �i � ��� VI ON a l)ict ilifft Rv eost r� <=20% -- New 4S envious coverArea Type yeas existin s imos) ° Development_y ent For Develo•Rent e) L(pre) 17/o _-- New Develo•m Rv(Pre) * 43.72 707.Development W ak s""_--- 36.18 C f e ,, 0.39 18.09 ----21.86 3.77 17% Other Rural Land_..-.-- o h 4,1- ,t ` 0.39 • 20.67 24.99_ 4.31 _-... .«.-� � {a�1 , a �,A }�F%� 0.39 .._—.---- _' Min.values impervious cover _�R- Area Type ent Areas,ext�in' ost RR Development Area _ For Devote•m 11.16 26% Nlat� e'Watersheds ReaeVe{o Rent L •re 4�2 o Drinking '-6.49 30/o __---- ti t C� f Y a Y 0.39 36.16 21 86 30% Other Rural-- 1 ! ,� i r}` 0.39 20-67�„ 24.99y_.---- rev.-sil Feb 1998 GEB �"`��:.?�����-�;r`,rf�:,.�th• interim Manual,Page 70 � 't ��{c. 1 1 1 i /\ . Routing: post dev captured ' Water EL 352.676 0.0 0.0 228.322 349.9984 0.269 2, P Discharge 0.588 Intl o. 36.018 1.0 5.145 232.628 350.0209 0.271 2, 2.0 10.291 249.17 350.1057 0.277 2, al:1 3.0 15.436 277.131 350.2446 0.287 2, 4.0 20.582 316.501 350.4315 0.299 2, 5.0 25.727 367.274 350.6593 0.313 2, 6.0 30.872 429.449 350.9209 0.329 2, 7.0 36.018 503.022 351.2093 0.346 2, 8.0 32.937 578.853 351.4867 0.361 2, 9.0 29.856 647.806 351.7238 0.373 2, 10.0 26.774 709.887 351.9267 0.384 2, 11.0 23.693 765.1 352.1 0.393 2, 12.0 20.612 813 448 352.2479 0.4 2, Il . 13.0 17.531 854.917 352.3721 0.406 2, 14.0 14.45 889.463 352.4739 0.411 2, 15.0 11.369 917.101 352.5542 0.431 1,2, 16.0 8.288 937.827 352.6138 0.49 1,2, _J I • I .• I II Routing: post dev captured ( I I .`� ``�" ' Water EL 353.766 0.0 0.0 28.322 349.9984 0.269 2, I_ Discharge 10.030 1.0 1.722 ' 8.826 350.0011 0.27 2, r Inn ow 12.053 2.0 3.444 a 33.965 350.0278 0.272 2, 3.0 5.166 r 42.924 350.0739 0.275 2, 4.0 6.888 ►55.701 350.1387 0.279 2, 5.0 8.609 r 72.294 350.221 0.285 2, I i 6.0 10.331 '92.7 350.3197 0.292 2, 7.0 12.053 16.917 350.4335 0.299 2, 8.0 12.053 .3.029 350.5523 0.307 2, 9.0 12.053 c 69.125 350.6674 0.314 2, 10.0 12.053 c 95.206 350.779 0.321 2, 11.0 21.271 350.8875 0.327 2, FA ` 12.0 7.323 350.9929 0.333 2, 13.0 • •73.361 351.0955 0.339 2, 14.0 • •99.386 351.1956 0.345 2, 15.0 -25.399 351.2931 0.35 2, 16.0 .51.4 351.3884 0.356 2, Hyd2 post dev captured (routed) 0.0 Io.o I0.0 I' Hyd1- appror target 1.0 0.6587 0.27 j__ 2.0 1.3175 0.272 3.0 1.9762 0.275 4.0 2.6349 0.279 5.0 3.2937 0.285 __ R❑ '2 C169d n 909 F C STbasm.txt hicitiaiso,ww. . :,i . WI. . I compute outputUM' I tlle:///t,I/users/gbrooks/uocuments/t ng_wonutng_worx_Zut 1/L,vitleSeITStorage/comp_redo_lulvovlul l/l,S I bastn.txt BasinFlow printout INPUT: Basin: Charlottesville Self Storage downgrade 5 Contour Areas Elevation(ft) Area(sf) Computed Vo1.(cy) 348.00 1400.00 0.0 350.00 5169.00 228.6 352.00 8594.00 733.0 354.00 11465.00 1473.4 356.00 14000.00 2415.0 Start_Elevation(ft) 350.00 Vol.(cy) 228.62 4 Outlet Structures Outlet structure 0 Orifice name: riser outlet area (sf) 0.785 diameter or depth (in) 12.000 width for rect. (in) 0.000 coefficient 0.500 invert (ft) 348.000 multiple 1 discharge out of riser Outlet structure 1 Orifice name: riser inlet area (sf) 0.785 diameter or depth (in) 12.000 width for rect. (in) 0.000 coefficient 0.500 invert (ft) 352.500 multiple 1 discharge into riser Outlet structure 2 Orifice name: riser inlet fiipgnf in lerre/ohrnnlce/llnrnmente/Fnn wnrk/Fno wnr4 WI 1 1/('villPQrlfctnraaP/rmmn ridn 111Nnv7f11 1/CQThacin txt(1 of 411 1/1 N'Nll 1 d•') )st PM tueaii�I/usersigorooxsiuocumentsir ng_wonutng_worx_Zu 11IL.vuleelmrorageroomp_reao_t uNovZU t t/LS I basm.txt • area (sf) 0.049 diameter or depth (in) 3.000 width for rect. (in) 0.000 coefficient 0.500 invert (ft) 348.000 multiple 1 discharge into riser Outlet structure 3 Weir name: emergency spillway length (ft) 15.000 side angle 0.000 coefficient 3.300 invert (ft) 353.500 multiple 1 discharge through dam 4 Inflow Hydrographs Hydrograph 0 Modified Rational name: approx target C 0.300 Area (acres) 10.300 IDF file: al time of concentration (min) 15.00 receding factor 1.670 time increment 1.00 time limit (min) 200.00 fudge factor 1.00 storm: peak intensity (zero duration) volume (cy) 439.70 peak flow (cfs) 9.881 intensity (in/hr) 3.198 time to peak (min) 15.000 duration of peak (min) 0.00 routed false Hydrograph 1 Modified_Rational name: post dev captured C 0.800 Area (acres) 10.300 F1r..MCI n Tca..o/,.1,rn,.1«mn,.,,..,A,.tc/P.,c. n1.l,,.,)nl t..*i)r,f All 1/1 n/')n 1 1 A.)1.142 DAA rnevituvusersigorooKsiuocumenisirng_wonvnng_wurx_zui IILviueaeaMorageicomp_reao_iUINOVZU1 uua i oasm.uu IDF file: al time of concentration (min) 7.00 receding factor 1.670 time increment 1.00 time limit (min) 200.00 fudge factor 1.00 storm: peak intensity (zero duration) volume (cy) 747.97 peak flow (cfs) 36.018 intensity (in/hr) 4.371 time to peak (min) 7.000 duration of peak (min) 0.00 routed true Hydrograph 2 Modified_Rational name: post dev captured C 0.800 Area (acres) 10.300 IDF file: al time of concentration (min) 7.00 receding factor 1.670 time increment 1.00 time limit (min) 200.00 fudge factor 1.00 storm: crit. duration (102 iterations) volume (cy) 1516.18 peak flow (cfs) 12.047 intensity (in/hr) 1.462 time to peak (min) 7.000 duration of peak (min) 47.29 routed true Hydrograph 3 Difference (comparison) name: check hydrograph 0 hydrograph 2 OUTPUT: Routing Method: storage-indication rue:///a I/V Serb/guruuKs/vucullerlw/nng_wviic/nug_wvir_.v,1/c.vuIcuc1I LviagciwuIN_i cuv_rvilvvLv 11/\,.3 i u44,111.LA' Hydrograph 0 approx target (not routed) Hydrograph 1 Routing Summary of Peaks: post dev captured inflow (cfs) 36.018 at 7.00 (min) discharge (cfs) 0.588 at 19.00 (min) water level (ft) 352.676 at 19.00 (min) storage (cy) 959.509 Hydrograph 2 Routing Summary of Peaks: post dev captured inflow (cfs) 12.053 at 7.00 (min) discharge (cfs) 10.030 at 56.00 (min) water level (ft) 353.766 at 56.00 (min) storage (cy) 1375.731 Hydrograph 3 Difference (comparison) name: check hydrograph 0 approx target peak flow (cfs) 9.881 at 15.000 (min) hydrograph 2 post dev captured (routed) peak flow (cfs) 10.030 at 56.000 (min) Thu Nov 10 16:16:36 EST 2011 file.///Cl/1 Iaerc/ohronks/Documents/Pno wnrk/Fno work 201 1/CvilleSelfStoraoe/comn redo 10Nnv201 1/CSTbasin.txt(4 of 4111/10/201 1 423•.2R PM