HomeMy WebLinkAboutPacket 03-22-02
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Storm ,drainage' report .
For:
CarlTlel Centre West
Project NOD 111-1376
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Prepared By:
.Mid-States EngllL'ering
350 East N~w York Street, Suite 300
Indianapolis, Indiana 46204
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March 22, 2002
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Narrative
I ntrod uction
The project site is located at the southeast corner of intersection of 106
Street and Commerce Drive In Carmel, Indiana, and is bounded by 106 Street on
the north, by subdivision to the south, by future development to the east and
Commerce Drive to the west. The site IS not within the 1 DO-year flood zone per
Flood Insurance Rate map 180081 0011 C.
Description
This project consists of the construction of proposed commercial building and
associated parking areas and landscaped areas. Additional project activities
include the construction of a proposed storm sewer system and swale to drain
the site.
Existing Site Description
The site is presently undeveloped. Under existing conditions, the project site
consists of grass and existing brush including horseweeds and scrub brush. A
soil map from United States Department of Agriculture Soil Conservation Service
Identifies Crosby and Brookstone soils on the property and is included in the
Reference Maps.
ExistIng drainage characteristics are such that the site generally flows to the
existing swale on the north that eventually discharges into storm sewer system
within Commerce Drive. There is a low spot in the center of the site surrounded
by vegetation. Once developed, the stormwater will collect in a storm sewer
system and connect to the existing network.
Proposed Conditions
Proposed drainage for the developed site consists system of new storm inlets
and connecting pipes. The developed site will draIn to the west into an existing
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storm sewer system within Commerce Drive. The storm drainage system along
Commerce Drive was desIgned to accommodate the direct runoff from the
subject site. All new storm sewers were designed to accommodate a 10-year
storm event using the Rational Method. Calculations are included in this report.
Based on the study prepared by American Consulting, Inc, the sutJject site has
been included as the area in the proposed condition that will flow to the existing
culvert under US 421 and into the Park Northwestern drainage system. The
subject site was designated as Block B.
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REFERENCE MAPS
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--....~.-.:.:.;.:..:..-,~':-".::.~:<-'.....=-~.~-....--..-'_'-----,_""'-_. ..........::...:..:.......2- -=-"_-...,--',_,_.....
HAMILTON COUNTY, INDIANA
SHEET NUMBER 55
Cl "~I.'---" .----r
....::l-Sta..__-_ogmlk.,...,J, L.L"-.-1
STOR~1 llRAIN FLOW TA.OULA TION FORlI1
I'ROJt:CT NAME
STORM FREQUENCY llESIGNYEAR
DESCRIPTION
LOCA TlON
FROM TO
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5 1 4
....,....::.,:{...,.:..I
4 ";<1.1]
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CAIlMEL CENTRE WEST
PHASE I
10
DEVELOPED CONDITIONS
ACRES COEFF.
SUB TOTAL "C"
.:..:...,'.......:::1 0.90 1 0.17
0.19
....:.:.':::.............] 0.90 I 0.34
0.57 'I?)):.::::::::::::.?::::.:.{
...:,...::...:,:,./.....:] I
I{-"'::::',:,:,:I
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-, I 0,21 I.',:,:,:::,,)] 0.90 1 0.19
..........--...."".""....:, ,:......."..--,...,,'--
:....:..::..,::;.:...::;},}......',...,'...'...., 0,21 ,.:...:..::....:...:},.:...:."':.,..,....,..",.,.
2 I 0.14 0.90 I 0.13
I I 0.08
exi't! ] 47'i}:'W'::}';';".:..;,;~}~i
::::=::: :::: }:: ::::::{: ;:::;::::::;:;:: ,;.: .;.;. ;.;.; 0.3 5 ':::::: :~:::::::; :::::::::) ;:::::;:: :~:::::;:: ::::: :;::
0.43
....----..,.........
............-----.,..,......
.'.........,...........---.-.
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a._.__..'..........,.......
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3/25/02 8:45 PM
0.50 1 0.04
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TIME CONe. (tnln) INTEN.
INLET DRAIN TOTAL 'T'
0.17
0.51
0,19
0.32
0.36
10,00
10.00
10.00
10.65
10.00
iO.DO
10.00
10.9~
10,00
1132
.~. :~~.:<_...,.., ,..', :..
0.65
0,44
0,98
034
0,29
10.00
10.65
10.00
11.09
10.00
10.98
10.00
11,32
10.00
11.62
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PROJECT No,
111-1376
CALCllLATEll
"Q'" - PIPE (IoU
CIA SIZt: SLOPE VEL.
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5,48
548
5,48
5.33
0.94
0.94
1.87
2.74
..'..'..,-.-......... --,-.... """.'"
:.:':.:':':.:':':"':':':':':':.:-:':-:.:.:':.,.,'..',.".....
[2.00 I 0.07 I 1 19
15"00 I 0.18 I 2.23
......,....,.."..........
.-.-.,.-.....,....',...,....,..'.'............,'.
':::::~:~:::::::::::: ::::: :;::.:.:.;.:.:-:;:: ::::: ::;:: :::: :~::: . .
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."..----....--... .".
. .',. .. ..~':':.>~::.::::::::~:~~::::::<:::;:::::;;:::;:;:::;
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5.48
5.48
5.48
5.26
5,48
5 19
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0.013 PIPE
LGTH SLOPE
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COMPUTED BY: LIS
CHECKED BY:
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71 I 0.16 I 1.43 1
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78 I 03\ I 3.6] 1
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1.04
1.04 j 12.00 I 0.08 I 1.32 I 100 I 0.14 1 1.34 I
0,69
1.66 I 12.00 I 0.22 I 2.11 t 47 I 0.25 I 1.79 I
0.22
1.84 I ] 2,00 I 0.27 I 2-35 I 45 I 0.32 I 202 I
Page 1 of 1
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[.82 I 893.21
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2.94 I 893, II
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1.70 1 892.97
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2,2i I 892.76
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2.57 I 892.59
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MH D.p' LOCATION
TC-OUT FROM TO
895.25
893 t]
895.45
89286
89514
892.83
895.09
892.64
895.46
892 .45
2,17
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4 1
2.34
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2.17
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2.87
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1 1 lexist.1l4
1376storm sewer design