HomeMy WebLinkAboutStormwater Managment Plan
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David Granger, P.E.
KFCJT ACO BELL
YUM BRANDS
Stormwater Management Plan
4/17/2008
10575 North Michigan Rd
Carmel, Indiana 46032
Prepared For:
City of Carmel
Hamilton County, IN
Prepared By:
GPD Group
520 S. Main Street
Suite 2531
Akron, Ohio 44311
P: 330-572-2100
F:330-572-2101
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KFCfT ACO BELL
Carmel, IN
2007088.16
Background
The project site is considered to be a high point for the drainage area, which is 0.76
acres of drainage area. This total area splits into three directions, but all discharges
into the same existing storm ditch, which is located along North Michigan Road.
This site is located within Carmel in Hamilton County, Indiana. The site is located
on the north side of North Michigan Road and is further located at latitude
39.93841 and longitude -86.23576. The existing drainage area conditions consist
of 0.16 acres of pervious area and 0.60 acres of impervious area. The proposed site
improvements will consist of a new 0.08 acres building addition, 0.48 acres of
impervious pavement/sidewalk and will enhance balance of the site with pervious
landscape areas of 0.20 acres site. The existing watershed conditions also drain to
the said existing ditch in a similar pattern as the proposed. The northeast half of the
site drains to storm sewers with discharges to the said existing ditch and the
southwest half of the site drains thru curb openings directly to the said existing
ditch.
Methods of Stormwater Management Design
The existing storm system surrounding the site will be utilized and new onsite storm
sewer will connect to the existing drainage system. This proposed layout and
surface grading will maintain the current water shed conditions. The northeast half
of the site will utilize the new storm sewer tied into the existing. The southwest half
of the site will remain as surface runoff directly to the existing ditch. This runoff
condition is improved with the use of multiple curb drainage openings with
permanent erosion protection and buffer strip before discharging to the existing
ditch. Each new curb drainage opening with smaller contributing drainage areas
will reduce the amount of erosive runoff that is believed to be currently generated
by the single unprotected curb opening. All stormwater management criteria must
follow the stipulations set forth by the City of Carmel and the County of Hami Iton.
The reduction of the impervious area and wider distribution of drainage area
discharge will allow the site to be redeveloped without additional detention.
Enclosed are calculation summary sheets which were generated through the use of a
excel storm sewer computation sheet, a weighted "C" value worksheet, and a storm
drainage area map. This program is utilized in the drainage calculations for the
storm systems improvements. The summary sheet illustrates calculations based on
the 1 O-year storm and a 25-year storm hyd rau] ic grade checkl uti I iz i ng the Rati anal
Method. The standard formula (Q=C1A) is used to calculate the discharge rates of
the proposed pipe system and the Manning Equation is used to calculate the pipe
sizes. Also included is the rainfall Intensities taken from the NOAA's
Hydrometeorological Design Stud ies Center Preci pitation Frequency Data Server for
the site's drainage area.
STORM SEWER COMPUTATION SHEET
C.lculoted by;
Checked by;
KJB
Dale;
Dale;
4/1412008
Just Full Capacity 1 b Year Frequency
Project Name;
KFcrT ACO BELL CaImel
MmUllngs "nO> far concrete pipe
M~nnings "0" for HOPE pipe
0.013
0.012
Hydraulic Gradient 25 Year Frequency
1,~!;~Jdelloles actual water swface governs for Hydraulic Gradient
Project Number;
Sheet No.
2007088.16
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6
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9
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13
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20
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:I: g ~ ~ ] '" .'3 S Elevation
~ Time of Discharge in e ~ > Mean fit OJ 0
0 c Drninilgc Area Rainfall U Co[wnn 7 ~ g, 0 .!:l ill '"
'~ .:; -::l ~ u > .3 of
ce Coucentration 1:1:: cfs (Column 6 ;:;:: u Velodty " c
on (acres) (inchesibour) Column 4 OIl a. 'oj ] ~ U] 0 Hydraulic
ai" iii 0 ..... 0
(min.) ~ x Column 8) 0 ~ ] 0; (ftIsec) 'n -g
0 " 00 l'-< .S Gradienl
0 ] 'to: '"
:r: .!J c.: c.. :r:
;::;: ell
No. M LA lIle Ltc 110 I,l C ACA J.:CA QIO Q15 ell L S Feet Feet Vm cfs Feet Sf H Feet
CB.B '0.22' , 10:0 5.'71 6.39 .0:8,4 018 1.06 1.18 :..12. : 9,9'.: 0:65 . 891.44 890.80 3.04 2.49 893:63 . 0.0009 0.0926 [}X8Mlltr~j
CB.A '0..10 ,. 0,32 0,5 10,5 5.63. 639 0..92 0.09 0.28 1.56 1.77 012: .19 .,0,50: 890.80 890.70 3.03 2.18 89.4~12 . 0,0021 0.0399 891.74
ST 2 0.00 032 0.1 10,6 6,39 0,00 0.28 890.70 894'.29 891.70
G:ICivil\2007088\16\DIStm Design\041408-STM SEWER CALCxJs
WEIGHTED 'e' RUNOFF COEFFICIENT
JOB # 2007088.16 4/14/2008
AREA I 'C' VALUE I AREA I SUM
CBA
IMPERVIOUS 0.96 4043 3881.57
PERVIOUS 0.40 270 108.00
TOTAL AREA'" 4313
TOTAL C'A=o 3989.57
WEIGHTED 'C' RUNOFF COEFICIENT" 0.92
CB B
IMPERVIOUS 0.96 7603 7298.40
PERVIOUS 0.40 2121 848.56
TOTAL AREA'" 9724
TOTAL C'A= 8146.96
WEIGHTED 'C' RUNOFF COEFICIENT" 0.84
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Precipitation Frequency Data Server
Page 1 of 4
POINT PRECIPITATION
FREQUENCY ESTIMATES
FROM NOAA ATLAS 14
Indiana 39.93841 N 86.23576 W 905 feet
from "Precipitation-Frequency Atlas of the United Slates" NOAA Atlas 14, Volume 2, Version 3
G.M, Bonnin, D. Marrin, B. Lin, T. Parzybok, M.YekIa, and D. Riley
NOAA, Narional Weather Service, Silver Spnng, Maryland, 2004
E~traeted: Man Apr 142008
t~:
I Precipitation Intensity Estimates (inlhr) I
~~~~~~~~~~~~~~~~~~~
(years)~LmmJ~~~~CJDlJgJWLkJLgill~~~~~~
~14.62113.59112.94111.941~lo.7oI10.491Io.29110.171~10.06110.03110.02110.02110.01110.01110.01110.011
~IS.48114.28113.49112.341~lo.841Io.s9110.3sII0.211~10.07110.04110.03110.02110.01110.01110.01110.011
~16.ssI15.091~12.8sj~~lo.7sI10.44110.261~10.09110.OsII0.03 110.03 110.02110.01110.01110.011
~17.43115.73114.70113.26112.o8111.23110.881I0.52110.301~10.1Otlo.06110.04110.03110.ozIl0.02110.01110.011
~~16.531IS.38113.79112.46111.481IL05I1o.63110.36110.20110.l2110.06110.Mllo.03110.0ZI10.02110.01110.011
~19A3117.15lls.9oI14.22112.781~~lo.72110.41110.23110.13110.07110.05110.04110.02110.02110.02110.011
~110.30117.75116.42114.631~IL90111.371Io.821[0.46110.25110.14110.os 110.05 110.04 110.03 110.02110.02110.011
1'.'w~.llmblf8:ThI16~~"II~o;llmllmlll~rll@3~llo:5r'll~s'Ild:ib"11~911~11~II~YII~II[mlloml
l~oIl12A111~121~.591Is.~113.891~<<1~11.~I~110.DI~~~~II~o5110.03110.ml~mII0.o21
~113.32119.70118.08116.06114.25112.711~11.21110.65110.35110.191~lo.07110.05110.03110.02110.02110.021
. These precipilatiOl1fr~enty estimates are based ona Damel d~ration series. ARI is the Average Recurrence Intel\lal.
Please refer 10 the documentation for more information. NOTE: Formatting lorces estimates near mro 10 appear as zero.
* Upper bound of the 90% confidence interval
Precipitation Intensity Estimates (in/hr)
ARI**lfSll1Olr15lI3OlI6Ol[12O]I3lI6lIUlr24ll48ll4ll7ll1Olrwlf3Oll45lf6Ol
(years)I~~~~~~~W~~~~~~~~~~
~~13.9SI13.Z51~~lo.77llo.55110.32110.191~lo.06110.o41]0.02110.02110.01110.01110.01110.011
~16.07114.74113.86112.59111.59110.93110.66110.39110.23110.13110.08110.041]0.03110.02110.02110.01110.01110.011
~17.2slls.63114.611~~~10-83110.49IJ0.281~lo.091Io,05110.03 110.03 110.ozllo.01110mllo.oll
~~16.32lls.18113.60112.29111.36110.97110.58110.33110.191~lo.06110.04110.03110.o2110.02[lo.OlII0.011
~19.421~15.931~12.721~~lo.70110.39110.22I~10.D7110.05110.04110.021]0.02110.02110.011
~110.441~16.53114.66113.07I~~lo.80110.45110.2sI10.141lo.os 110.05110.04 110.03 110.02110.02110.011
~111.41118.591~~13.431~~~lo.sollo.271~lo.osllo.06110.04110.Q3110.02110.02110.021
~112.46119.301!7.7IrI5.63113.82112.351~~lo.56110.30110.17 110.09 110.06110.os 110.03 11002110.02110.021
~113.90111O.22118.50116.3oI14.36112.72111.991~lo.6sIl0.341~~]0.07110.osII0.03110.021Io.02110.021
~~~~~~~~~~~~~~~~~~~
. The upper bound at too confidence Interval alOO% Cllnlldence level IS the value which 5'4 01 the simulated quamila values lor a given Irequency era grealer than.
.. These precipitetiOlllrequency estimates are based on a partial duratiOll series. ARI is the Average Recurrence IntelVaI. .
Please rEfer 10 the documenlation lor more information. NOTE: Formatting preve~\s estimates ~ear zero 10 appear as zero.
* Lower bound of the 90% confidence interval
Precjpitation Intensity Estimates (in/hr)
ARl**ll5lrwlliSlf3Oll6Oll12Oll3ll6lrull24lf48lf4l!7lflOlfWlf3Ol[45]16Ol
{years)I~~~~~~WW~~~~~~~~~~
r-----l r----1 ,----,r--lr--l,___,~,___, r----'1r-l r-----1r--lr-1r-l r--------J"""-''---''r--, r---l
http://hdsc.nws.noaagov/cgj-binlhclsc/buildout.per 1 ?type=idf&units=us&series=pd&statename=IND IAN... 4/14/2008