The URL can be used to link to this page

Home My WebLink AboutDrainage Calculations u u , ~ i'"'l>_ j;. -'.: .f:..... ..:~ '..... ~. ':::i~; .... h},~i.'1 . Ov Old Meridian Professional Village Drainage Calculations SNELLING ENGINEERING, LLC 1.3295 IlIillois Street, Suite 142 Camwr.IN 4()OJ2 I'h (17) 6ti3-3206. fax: (3J 7) 663-3208 Ww\v.Sliell i ngen g.com Prepared by: Gregory S. Snelling, PE Date: June 22, 2007 /1 , " .'/1 '; ./ w u DRAINAGE SUMMARY General The existing 6.25 acre site is located between Old Meridian Street, Pennsylvania Street and Carmel Drive south of the Meijer detention basin within the city limits of CarmeL The site is presently occupied by a combination of lawn and woods with several small old structures. The site drains to the east with runoff exiting the site at a culvert under construction for Old Meridian Street. The culvert discharges into the Fertig Drain. The site is not located within a FEMA flood hazard area. AltaBC is proposing to construct a mixed-use office and retail development on the site. The project will have 7buildings totaling 88,500 SF and 356 surface parking spaces. Pre-Development Conditions Due to downstream restrictions, the laO-year allowable discharge for projects within the Fertig Drain watershed is 0.25 cfs/acre. Therefore, the] DO-year allowable discharge for this site is 1.56 cfs Post-Developed Conditions An 87,200 CF underground detention system will be installed under the parking lot to control the peak release rate. Due to the footprint of the underground system with respect to the outlet location, offsite area must be routed through the detention system. However, the underground system was initially sized for the 6.25 acre onsite area. Calculations were then performed to determine tbe outlet pipe size required to accommodate the upstream watershed comprised mostly of the Pennsylvania Street right-of-way between Carmel Drive and the round-about currently under construction to the south. For the onsite calculation, a 5.7 inch orifice would be needed to control the peak discharge to 1.54 cfs. With the offsite runoff included, a 12 inch orifice flowing into an 18-inch pipe is required. In both cases, the detention system would fill almost completely during a IOO-year 24-hour event with a SCS Type II rainfall distribution. Two structural BMP's will be installed for the project. TheseBMP's will consist of Streamguard Mode] 3001 catch basin inserts and an Aquaswirl AS- 7 stann water quality unit. Independent testing for the Streamguard Model 3001 by King County Surface Water Management Division of Washington State demonstrated oil removal efficiencies of 88% when tested in a park~and-ride lot catch basio. Streamguard Model 3001 Catch basin inserts installed at an international airport's passenger pick-up area show average removal efficiencies for Total Suspended Solids of 80%, and for oil & grease of 94%. Aquaswirl products are typically accepted by the City of Carmel as BMP's. The Aquaswirl AS- 7 for this project was sized for a l-inch 24-hour rain event as required. A Post~Development Watershed Map and Time of Concentration calculations are also included in the Appendix. In addition, Detention Calculations and Pipe Sizing Calculations are also included. .W u Conclusion The project has generally been designed in accordance with City of Carmel and Hamilton County standards. In addition, the project is not anticipated to cause any adverse effects to upstream of downstream properties. City of Carmel (Extraterritorial Jurisdiction) 180081 86.0'3' 22. 5" 39" 58' 0 7 . 5 " City of Carmel 180081 Hamil ton County I Unincorporated I. Areas 180080 - Dl o 122ND ST o --- ~ COLLEGE DR APPROXIMATE SCALE 500 0 1---1 ~ 1---1 f-- [j) '" u o u Z <l: I 500 FEET I NATlOIlAL FLOOD INSURANCE PROGRAM FIRM FLOOD INSURANCE RATE MAP HAMILTON COUNTY, INDIANA AND INCORPORATED AREAS c {SEE MAP INDEX FOR- PANl:LS NOT PRINTED} NUMBER fe!:!.51. SUFFIX 'aOO~1 ~w 1l1OO8O m:~~ f.ie.li(;i!l ~ Uelor: "If! MAP "u.'..~e.:A ~rQl.\,n ;(II.c"f ~l1Ql.lld llo/l WlI':: .....I...... ~..dn.. ~Jlll Old.,: lIIaCDMMc.r.:H'r NUM8EoR .OO"'n lib~."~wld I:Ia lJ:1&tf 0./'1 i~IBI1I;$ ;OjJ~llc..ll""", {er ,he Iltl;J-iee1 r:.QlI'I/'nIJo"11ey c MAP NUMBER 180S7C0209F EFFECTIVE DATE: FEBRUARY 19,2003 Federal Emergency Management Agency This is an offilJJal copy of a portion ot the above referenced t1(lod map, It was extracted using F~MITOn~Line. This map does not reflect chan~es or amendments which may have been made sLJbs~quent to the date on the title block. For the latest product jr.formation about National Flood insurance Program 'flood maps check the F'EMA Flood Map Store at'ltVWVw'.ms.c.fema.gov u Project: Old Meridian Professional Village Location: Carmel,IN Prepared By: GSS Channel Flow: Str. 208 Grass 0.15 0.15 65 0 2.64 2.64 0.010 0.020 .,.'~l~ ~;J~~o~ un aved 123 0 0.010 0.000 1.613 0.000 :~,1!:1QJ02~~ ",";mlipJilJ Bottom Width....................ft Depth.... .........., .....tt Left Side Slope ?:1 Right Side Slope ?:1 Cross sectional flow area, a..........ft^2 0 0 Wetted perimeter, Pw.....................ft 0 0 Hydraulic radius, r=a/Pw Compute r....ft 0 0 Channel slope,s... .................. ,ftIft Manninq's rouQhness coeff.,n.. V =(1.49 r^2/3 s^1/2)fn Computed V...ftJs 0 0 Flow length, L ........................fl. Tt = U(3600 V)........".Computed Tt..hr. ~.' ttOOQ' :::':;0(000 Total Time of Concentration: Watershed or subarea Tc or TL..hr Watershed or subarea Tc or Tt.....min o 0 o 0 'O,00-o:';,[m060 H All Time of Concentration values are assumed to be a minimum of 5 minutes. u Date: 6/20/2007 w Water Quality Prepared by Snelling Engineering, LLC HydroCAD@ 8.00 sin 003943 @ 2006 HydroCAD Software Solutions LLC Runoff = Subcatchment PR: Proposed Site 8.44 cfs @ 12.04 hrs, Volume= 0.527 af, Depth> 0.79" Runoff by 3CS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Type II 24-hr 1 in-24hour Rainfall=1.00" Area (ac) 8010 8.010 Te Length (min) (feet) 12.6 CN Description 98 Urban commercial, 85% imp, HSG C Impervious Area Slope Velocity Capacity Description (fUft) (fUsee) (efs) Direct Entry, u Type J/24-hr 1in-24hour Rainfal/=1.00" Page 1 6/22/2007 u u Postdeveloped Prepared by Snelling Engineering, LLC HydroCAO@ 8.00 sin 003943 @ 2006 HydroCAD Software Solutions LLC Runoff = Type /I 24-hr 100yr-24hr Rainfal/=6.46" Page 1 6/22/2007 Subcatchment 1 S: Overall 45.76 cfs @ 12.04 hrs, Volume::: 3.042 af, Depth::: 5.87" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-48.00 hrs, dt= 0.01 hrs Type II 24-hr 100yr-24hr Rainfall:::6.46" Area (ac) 1 .480 2.480 0.350 1.910 6.220 0.933 5287 Tc Length (min) (feet) 12.6 Inflow Area ::: Inflow = Outflow ::: Primary CN Description 95 Urban commercial, 85% imp, HSG D 95 Urban commercial, 85% imp, HSG D 94 Urban commercial, 85% imp, HSG C 94 Urban commercial, 85% imp. HSG C 95 Weighted Average Pervious Area Impervious Area Slope Velocity Capacity Description (fUn) (ft/sec) (cfs) Direct Entry, Pond 2P: Underground Storage 6.220 ac, Inflow Depth = 5.87" 45.76 cfs @ 12.04 Mrs, Volume::: 1.54cfs@ 14.13hrs, Volume= 1.54 cfs @ 14.13 hrs, Volume= for 100yr-24hr evenl 3042 af 2.919 af, Alten= 97%, Lag= 1258 min 2.919 af Routing by Stor-Ind method, Time Span::: 0.00-48.00 hrs, dt::: 0.01 hrs Peak Elev= 853.42' @ 14.13 hrs Surf.Area::: 0 sf Storage= 87,157 cf Plug-Flow detention time::: 693.7 min calculated for 2.919 af (96% of inflow) Center-of-Mass del. time::: 669.0 min ( 1,433.2 - 764.2 ) Volume #1 Elevation (feet) 849.92 853.42 Device Routin~ #1 Primary Invert 84992' Avail. Storaqe Storaqe Description 87,200 cf Custom Stage Data Listed below Cum Store (cubic-feet) o 87,200 Invert Outlet Devices 849.92' 5.7" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=154 cfs @ 14.13 hrs HW=85342' (Free Discharge) t....1=Orifice/Grate (Orifice Controls 1.54 cfs @ 8.69 fps) w u Postdeveloped with Offsite Prepared by Snellfng Engineering, LLC HydroCAD@ 8.00 sIn 003943 @ 2006 HydroCAD Software Solutions LLC Runoff = Type II 24-hr 100yr-24hr Rainfal/=6.46" Page 1 6/22/2007 Su bcatchment 1 S: Overall 58.92 cfs @ 12.04 hrs, Volume= 3917 af, Depth= 5.87" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-4800 hrs, dt= 0,01 hrs Type II 24-hr 100yr-24hr Rainfall=6.46" Area (ac) 5.126 2.884 8.010 1.202 6.809 Tc Length (min) (feet) 12.6 Inflow Area = Inflow = Outflow = Primary = eN Description 95 Urban commercial, 85% imp, HSG 0 94 Urban commercial,85% imp, HSG C 95 Weighted Average Pervious Area Impervious Area Slope Velocity Capacity Description (flirt) (ft/sec) (efs) Direct Entry, Pond 2P: Underground Storage 8.010 ac, Inflow Depth = 5.87" 58.92 cfs @ 12.04 hrs, Volume= 6.49 cfs @ 12.54 hrs, Volume= 6.49 cfs @ 12.54 hrs, Volume= for 1 OOyr-24hr event 3.917af 3.884 af, Alten= 89%, Lag= 30,5 min 3884 af Routing by Stor-Ind method, Time Span= 0.00-48.00 hrs, dl= 0.01 hrs Peak Elev= 853.36' @ 12.54 hrs Surf.Area= 0 sf Storage= 86,558 cf Plug-Flow detention time= 203.4 min calculated for 3.883 af (99% of inflow) Center-of-Mass del. time= 198.0 min ( 962.2 - 764.2 ) Volume #1 Elevation (feet) 849.92 85342 Device Routinp #1 Primary Invert 849.92' AvailStoraqe Storape Description 88,000 cf Custom Stage Data Listed below Cum. Store ( cubic-feet) o 88,000 Invert Outlet Devices 849.92' 12.0" Vert. Orifice/Grate C= 0.600 Primary OutFlow Max=6.49 cfs @ 12.54 hrs HW=85336' (Free Discharge) L1 =OrificelGrate (Orifice Controls 6.49 cfs @ 8.26 fps) Re-fe:r'!ir"lCI': HorL~ 40 80. OLD !<:':"'l-E, -.4{:' 0 MERIDIAN PROFESSIONAL CARMEL, INDIANA VILLAGE ~l.lldl.'\E Bu~jl\t!$$ Cc:.I'J1"r'nJl'liri~$ rDr S\Jo:(:e~.. 'Alt S' ("~, a ~>, [I ~JI 1- J " n Ii;! 2. 2 2 0 0 '" CSO Architects c c SNELLING ENGINEER:JNG,l..LC I J.l~'; 111,ooQ ,"ro,,-" ~<"I. I t:l Cu~"I<L,NtW'!' 1'1-0: (11,1 c,(,J.JI~~ I,., III~I r/,J..j.l~1 ........_ ......~F; "IJ.'no;.cr.o c & u u ~ 1 l " j ~I ~I , ~ . . 2 ~ ~ ~ ~ ~ e, ~ ~ ~ 't~ ~ ii~ " ~ ~ @ ~ " . . ~ ~ = ~ " " ~ ~ " !l . . ~, . ~ ~ ~ !! ~':Z: !I ~ !I'1i ~ ~ a ~ ~ ~ a 'ii ~ ~ ~ - ~ ~ OJ ~ a ~~ ~ a ~ " ~ ;; . ~ !! 'ii ~ , !l .~ . ~ .. ~ . . I ~ . ~ I ~ I ~ I ~ ~ ., I ~ . " I ~ ~ ~ ~ ~ ~ I ~ i I . . -. . . ~ . <I ~ . ~ ~ Ii ~ ~ ~ ii ~ !I ~~ a . . ~ " ;; " ~ '" . . ii . " ii . a . . '" . '" '" :; . iii . - . . ~~ ~ ~ ~ ~ ~ ~ ~ ~ . ~ ~ " " ~ ~ - ~ :l :< ~ r. k ~ '!\ 2~ Cl ! ~ ~ -, '" ~ S " ~ ~ !l ~ . "1 ~ !! ~ .; ~j;; " - .. " " ~ , - - ~~ "i - " " " ~ d ~ ~ :l ~ ~ . 0 '!' ~ " ;;l ~ ~ - ~ - ~ ~ 0" e ~ 2 B ~ @ ~ - ~ ~ . ~ ;;: , ~ $ . g " - " " - . ~ ~ ~ ! ~ . ~ ! ;; . ~ , 0 !: ~ :'i ~ ! ~ !;; ~ - M - " ~ ~ .. .. :; :; :l ~ ~ 5 .. 0 ~ :; ~ 5 ~ . . - ~ " !) . " " . " ~ ~ . " . " " . ~ ~ ,. " ~ ~ ~ " ~ 0 ,. " ;~ ~ ~ ~ ~ ~ ~ q " ~ a ~ ;5 . ~ . ~ .'J 1) ~ :'! ~' ~.~ 5 ~ ;! ~ ~ ~ ~ :: ~ :: - ~ " :;; " - - " ~ . . " 0 - . - . ~ - ~s- ~ ~ !\ ~ :3 ^ !~ ~ ~ 3 ! ~ 3 3 ::; :: ~ - :\ : :: ~ : :: :: :: . :: :1 : . :: :: ~: 3 :1 3 ~ . ;;< :: ~ 3 3 :: ~ ~: : 8 " ~ ~ ~ ~ " 2 ~ ~ ~ :1 ~ :\ ~ 3 3 ~ :'i ~:; ~ :1 ~ ~ ~ !! ~. ~ ~ ~ ~ :l ~ ~ ~ ~ ~ ~ ~ :'i ~ ~- ~ k . ~ - . 0 :'! ~ ~ :! :l ~ d !l '" ~ '" ~ ~ d 0 !~ " ! ~ ~ ~ 0 - ~ ~ 8 8 ~ ~ ~ ; ~,~ ~ ~ :! :! :! ~ ~ 3 ! 3 ! ! ! :! :! ~ :! ~ ~ :'! ~ " !l !l " " 8 ~ ~ ~ ~ ~- :! ~ ~ :! ~ ~ . .. .. ~.t'J ~ - ~ ~ ~ " - S !! ~ - 0 ~ ~ ~ . d 0 ~..~ ~ ~ 0 .. , " ~ - ~ :'l ~ ~ !l ~ ~ ~ ~ ~ ~ ~ ;j ~ ~ " d d ~ ~ 0 0 ~ . ~ ~ !i ~!.> ~ ;J .~ :l :l ~ ~ ~ ~ ~ ~ ~ :: :: :: : ~ : :l :l :l ~ ~ ~ ~ ~ ~ ~ - ~ 3 . ~ ! " ~ !'l ~ ~ : ;; ~ ~ ~ - ~ ~ ~ :I ~ - ~ ~ ~ ~ oJ - !! ~ " 3 ~ ~ d e ~ : ~ <i . . ~ 0 1i ~ ~ ~ ~ ~ ~ .' ~ ! .. ~ ~ ;! ~ .Ii ~ Ii ~ ~ H ~ . ;; t'l ~ - - - - - - - . ;; ;I ~ " ;; - - - Ji - - ;; - - - Ii ~ l! l! N " Ii . ;; ~ g ;; ;; " ;! ~ ;5 ;; ~ " ;; Jl " ;; Ii ~ :l " i'l - - ,. - - " .1' ~ ~ ~ i ~ " ~ ~ "I ~ I ; o 0:: City - ~ <( Z <!. ='j >- iJ) z ~ UJ Cl. Hamil ton County Unincorporated Are 180080 126TI; cP --. 9.58'01.5" 86"09' 22.5" City of Carmel (Extraterritorial Jurisdiction) 180081 Hamilton County Unincorporated Areas 180080 APPROXIMATE SCALE 500 0 ~ ~ ~ 500 FEET I o NATIONAL FLOOD INSURANCE PRGGRJlM FIRM FLOOD INSURANCE RATE MAP HAMILTON COUNTY, INDIANA AND lNCORPORATED AREAS c iSEE MAP INDEX FOR F'ANELS Nor PRINTEDl NUMBER ~~ SUFfiX ''''''' '8<<t~ 02(17 1001)6'3 om c l'IJQjJ(W t~ u,~: it\tI NIIb1' NUM~;R IJuw"n ;01;0.... ~M~Jd be ..~Od ...I1M pll!;::Ir1l rnip "rd.......; u.. C~M:UNlj'( IotIJMBe~ S'"l'CWn ItJO~" I~O-UJcj 00 '."oJ ...n mWimce B"PIlIi:)litklTlll lor II'te BUDi6~1 C~l"'ImlJ"f';\I. MAP NUMBER 1805JC0207F EFFECTIVE DATE. FEBRUARY 19,2003 Federal Emergency Management Agency This is. ~n offiGial ,copy ofa porti~l1 of the above referenced flood map. It was extracted U::Jlng F-MIT On...une. This map does not re"Mect changes or amendments which may have been made subsequent lo the date on the title bloc:k. FortJ'Je lates-t prOduct information ;about NatiDnal Flood Insurance Program 1Iood maps check the FEMA Flood Map Store at \\r'\tYVV.msc.fema.gov