HomeMy WebLinkAboutMiscellaneous APPLICANT 5/26/2009 (2)
.
.
R.ev I SE;D
5'~ 61'7 rrf74, L
Qeoma~
ENGINEERING, SURVEYING, BUILDING DESIGN
B06 N. NINTH STREET, COTTAGE GROVE, OREGON 97424
TELEPHONE: (541) 942-0126 FAX: (541) 942-7935
. E-w,IL ADDRESS: geomax@ibm.net
Job # 1-182
May 26, 2009
Kit and Karen Chan Family Trust
Main Street, Springfield, Oregon
ENGINEERING CALCULATIONS AND DESIGN REQUIREMENTS
for
SITE DRAINAGE AND BIo-SW ALE
'-
Original Signature is in red ink
7 sheets, including cover.
Code:
City of Portland Stormwater Management Manual, Rev. 4
2008 Ed.
. Loads:
Treatment Flow.
Design Storm
Maximum Storm
0.25 in/hr .
2 year
25 year
RECEIVED
MAY 26 2009
By: J(~
NOTE: No separate overflow pipe has been included in this design since the system is adequately
sized tQhandle'the 25 year storm runoff without surface ponding other than in the bio-swale.
GEOMAX, INe;
806 N. Ninth St.
Cottage Grove, OR 97424
541.942.0126
TREATMENT VOLUME
CRAN
Based on Drainage Areas
Area 1
Gross Drainage: W. Parking Lot
Drainage area
Time of Concentration
2 yr event
Percent of impervious area
Runoff Coefficient
Runoff
Area 3
Gross Drainage: E. Parking Lot
Drainage area
2 yr event
. Required treatment
. Pc"reent of impervious area
Runoff Coefficient
Runoff
Combined Parking runoff
I182 ruooff.xls
. .erut and Karen. Chan Family Trust. .
Chan Storage
Main St. Springfield, OR
1815 Main St.
Spri~gtield, OR
s.f. 6219 6219
acres . calc .0.14
hr. 24 24
in./hr. 0.25 0.25
% 100 1
c 0.9 0.9 . Light Industrial
Q=cfs calc 0.03212
s.f. 6266 6266
acres calc 0.14
hr. 24 24
in./hr. 0.25 0.25
% 100 I
c 0.9 0.9 Light Industrial
Q=cfs calc 0.03237
cfs .
0.06449
5/21/2009
RECEIVED
By:
MAY 2 6 2009
;J{/'
rdr
GEOMAX, INC.
806 N. Ninth St.
Cottage Grove, OR 97424
541.942.0126
.Kit and Karn Chan Family Trust.
Chan Storage
Springfield OR
5/21/2009
TWO YEAR STORM RUNOFF
KIT CHAN TRUST
1815 Main St.
. SpringfiOld, OR
Based on Drainage Areas
Area 1
Gross Drainage: W. Parking Lot s.f; .1 6219 1 6219
Drainage area acres calc 0.14
Time of Concentration hr. 24 24
2 yr Event in./hr. 1.3 1.3
Percent of impervious area % 100 I
Runoff Coefficient c 0.9 0.9 Light Industr
Runoff , Q~cfs calc 0.16704
Area 2
Gross Drainage: W. Side Bldg s.f. 5500 5500 .
Drainage area acres calc 0.13
Time of Concentration hr. .24 24 '
2 yr Event in. 1.3 1.3
Percent of impervious area %. 100 I
Runoff Coefficient c 0.9 0.9 Light Industr
Runoff Q~cfs calc 0.14773
Area 3
Gross Drainage: E. Parking Lot s.f. 6266 I 6266
Drainage area acres calc .. 0.14
Time of Concentration ' hr. 24 24
2 yr event in. 1.3 1.3
Percent of impervious area % 100 1
Runoff Coefficient c 0.9 0.9 Light Industr
Runoff Q~cfs calc 0.1683
Area 4
Gross Drainage: E. Side Bldg s,f; I 5500 5500
Drainage area acres calc 0.13
Time of Concentration hr. 24 24
2 yr Event in. 1.3 1.3
Percent of impervious area .% 100 1
Runoff Coefficient , c 0.9 0.9 Light Industr
Runoff Q~cfs calc 0.14773
Area 5
Gross Drainage:" Front s.f. 4032 4032
Drainage area acres calc 0,09
Time of Concentration hr. 24 ' 24
2 yr Event in. 1.3 1.3
Percent of impervious area % 100 I
Runoff Coefficient c 0.9 0,9 Light Industr
Runoff Q~cfs calc 0.1083 RECEIVED
Combined Parking runoff cfs 0.44364
Combined Roofrunoff cfs 0.29545 MAY 26 2009
Total Combined'runoff cfs 0.74
I182 runoff.xls By:ff rdr-
GEOMAX, INC.
806 N. Ninth St.
Cottage Grove, OR 97424
, 541.942.0126
25 YEAR STORM RUNOFF
KIT CHAN TRUST
Area 1
Gross Dramage: W. Parking Lot
Drainage area
Time of Concentration
25 yr Event
Percent of impervious area
'Runoff Coefficient
Runoff
Area 2
Gross Drainage: W. Side Bldg
Drainage area
Time of Concentration
2 yr Event
Percent of impervious area
Runoff Coefficient
Runoff
Area 3
Gross Drainage: E. Parking Lot
Drainage area
Time of Concentration
2 yr event
Percen~ of impervious area
Runoff Coefficient
Runoff
Area 4
Gross Drainage: E. Side Bldg
Drainage area
Time of Concentration '
2 yr Event
Percent of impervious area
Runoff Coefficienf
Runoff
Area 5
Gross Drainage: Front
Drainage area
Time of Concentration
2 yr Event
Percent of impervious area
Runoff Coefficient
Runoff
Combined Parking runoff,
Combined Roof runoff
Total Combined runoff .
.
.
Kit and Karen Chan Family Trust
Chan Storage
Springfield, OR
1815 Main St.
Springfield, OR
s.f
acres
min
in./hr.
%
c
Q~cfs
I 6219 6219
calc 0.14
, ~455 455
100 I
0.9 0.9,
calc 0.57821
Light lndustrial
s.f. I 5500 I 5500
acres calc 0.13
min m 5
in. 4.5 4.5
% 100 ' I
c ,0.9 0.9 Light fudustrial
Q~cfs calc 0.51136
s.f. I 6266 I 6266
acres calc 0.14
min m 5
in. 4.5
% 100 I
c 0.9 0.9 ' Light Industrial
Q~cfs calc 0.58258
s.f. I 5500 I 5500
acres cillc 0.13
min ~ 5
in. 4'.5
% 100 .1
c 0.9 0.9
~cfs calc ' , 0.51136
s.f. I 4032 I 4032
acres calc 0.09
min m 5
in. 1.3 , 1.3.
% 100 I
c 0.9 ' 0.9
Q~cfs calc 0.1083,
cfs
cfs
cfs
1.26909
1.02273
2.29
V:\Projects\2008\I 182\DesignII 182 runoff.xls
I
Light lndustrial
5/21/2009
Project 1-182
RECEIVED
Light lnd~By:
Total imp.
MAY 262009
tlC;L
0.63 ac
27517 s.f
rdr
.
Geomax, Ine
806 N Ninth St.
Cottage Grove,OR 97424
tel: 541.942.0126
. fax: 541.942.7935
CHAN STORAGE'
BIO-SW ALE DESIGN
Swale Hydraulics'
DESIGN CRITERIA
Minimum Slop~
Minimum Residence Time
Maximum Flow Velocity
Swale Manning's Coefficient
Minimum Freeboard
Maximwn Probability C;:onveyance
(25 yr Storm)
DESIGN PARAMETERS
De~ign Treatment Flow Rate
Basal Width
Swale Side Slope (Sw:I)
Assumed Depth of Flow
(iterate to match Q to Q.t)
Length of Channel
FLOW CALCULATIONS
TREATMENT STORM
. Side Slope Length
Hydraulic Radius
Flow Rate by Manning
Residence Time
V :\Projects\2008\I I 82\DesignVswale-calcs.xmcd
Sinih := .Op5
.tmin.''f 9:mio
VlI18.J{:;'P:9.s:c
n :;':.15
F;;;i~':"J.n
I's :;'.<14
. . .......:..3
qi :;':O3,~:~6
~:~5ji
S~:{:i
<I::=.059.n
Lc';' 6:i.5.n
.... . , .
.....:J ....2..2.
Lss:= {S,(i.d)<+d
R'~ (~~+~\t:d)"(d)
-' : (hB'. :'+. :2.1; ).
":"; :. ,-:; .:s~
. ...
..' . .' .':.1::....
." ....>'3 ~ :!.
1.49.n . "3. .. ... 2'
'2w:= '''n'sed~-...R::'-'~_inin
Q:= (hB+~w:d).(fv
L
.c
t .-
. V
.
5/21 /2009 .
Project 1-182
-L"';' 0.187il'.
; 55;" ,......:..:',..
. ..... - ..
.R.='0:057it.
,':.'. n:
V; 0.104.-
. '-'see
.... "':3
Q; 0.032 ft :
'. ::: "ft:i CHECKS
Qt= 0.032,...".
.' . ~ec
REICEIVED
. MAY 2 6 2009
By:.-t2.c~
rdr
.
Geomax, Ine
806N Ninth St.
Cottage Grove, OR 97424
tel: 541.942.0126
fax: 541.942.7935
MAXIMUM FLOW (25 YRS)
Flow volume
Assumed Depth of Flow
. Side Slope Leugth
Hydraulic Radius
Flow Rate by Manning
Residence Time
.
CHANSTORAGE
BIO-SW ALE DESIGN
..' ... ft~
Qp := .58....,,-
,,' see
.d25 :=O.77:.ft
~:~ JeS\V'c!z,5)?:ai5 ~
'..:2'(bBtSwdzsH12S)
K ... '(~Bt2Y;sL
'. J.2';.1
. ... 3 ... . .
V25.:~..1:t;...'R~'Smi~2
Q)= (!J~~S""cli~}A15'Y
;1.'0
,},'7X25
5121/2009 .
Project [-182
R.,,:0.57ft ,
,v21.i?A83.S:~
Q~05~5:e: CHECKS
t= 2)9lmiri
RECEIVED
By:
V:\Projects\2008\1l82\DesignVswale-calcs.xmcd
MAY 26 2009
QCL..
rdr