HomeMy WebLinkAbout11/25/13 moreplans
(Building)
1/A-202
(Equipment Wall)
3/A-202
816
"6'-8"8'-2
111
AFF
9'-8"
2A-201
2A-201
AFF
2'-10"
AFF
6'-9"
AFF
16
"10'-2
11
4
" AFF10'-9
3
2/A-301
AFF
9'-8"
16
" AFF10'-9
13
1/A-301
1/A-301
AFF
AFF
23"
3/A-301
4'-10"
AFF
9'-8"
4'-0"
AFF
10'-0"
AFF
4
"6'-3
3
AFF
3'-4"
AFF
16
"13'-0
5
AFF
9'-8"
1/A-201
1/A-201
3'-8"
10'-4"
AFF
10'-0"
3/A-301
16
" AFF10'-9
13
4/A-301
2A-2012A-201
1/A-202
5'-0"
3'-0"
5/AL-401
28"-0"
4"4"
6'-10"6'-10"6'-10"6'-10"
7'-7"
3'-0"
3'-0"
16"
16"
9'-0"7'-6"13'-0"7'-6"
" PAD SIZE37'-6
2
1
3/AL-401
6' TOP OF PAD
8' TOP OF PAD
1'-0"
1'-0"
8' TOP OF PAD4'
6' TOP OF PAD
1'-0"1'-0"
6' TOP OF PAD4'
8' TOP OF PAD
8' TOP OF PAD4'
6' TOP OF PAD4'-0"
15 FT
15 FT
Existing 5' Sidewalk
BROADWAY STREET
35' LANDSCAPING SETBACK
35' LANDSCAPING SETBACK
35' LANDSCAPING SETBACK
STORM WATER DETENTION CALCULATIONS
(Rational Method) 05-30-2013
Project: Casey's General Stores, Iowa City, Iowa
(Section 6 E. Central Iowa)
ormua
Fl
=
QCIA
Q =comuted runoff rate in cubic feet er second cfs
pp()
C =runoff coefficient for secified use
p
I =averae rainfall intensit in inches er hour for a 100-ear storm freuenc
gypyqy
and a time of concentration of 15 minute
s
=drainae area in acre
Ags
Pie Conveance Caacit
pypy
Formula
2/31/2
A (1.486/n) R S
Q =
Q =rate of flow in cubic feet per second
A =cross sectional area of flow in square feet
n = Manning's coefficient of roughness
R =hydraulic radius in feet
S =slope of pipe in feet per foot
Computed Runoff Rate
Area into Intake
ParcelParcel
Surface AreaTurf
TOTALS
C =C =
0.9500.350
55
=C =
C
0.9800.550Q Post Construction
100100
I =I = =
Q
4.160in./hr.4.160in./hr.2.5cfs
555
I =I =
Q =
4.9cfs
7.720in./hr. 7.720in./hr.
100100
100
A=0.580acresA=0.110acres
Q =2.3cfsQ =0.2cfs
55
Q =4.4cfsQ =0.5cfs
100100
Canopy Area
Parcel
Surface Area
C =
0.950
5
=
C
0.980
100
I =
4.160in./hr.
5
=
I
7.720in./hr.
100
A=0.170acres
Q =0.7cfs
5
Q =1.3cfs
100
Building Area
Parcel
Surface Area
C =
0.950
5
=
C
0.980
100
I =
4.160in./hr.
5
=
I
7.720in./hr.
100
A=0.100acres
Q =0.4cfs
5
Q =0.8cfs
100
Pipe Conveyance Capacity
SolutionSolution
12
Pipe Diameter =6inchesPipe Diameter =8inches
Pipe Material =HDPEPipe Material =HDPE
A =0.196A =0.349
n =0.009n =0.009
R =0.125R =0.167
S =0.010S =0.010
Q = 0.8cfsQ = 1.7cfs
SolutionSolution
34
Pipe Diameter =12inchesPipe Diameter =15inches
Pipe Material =HDPEPipe Material =RCP
A =0.785A =1.227
n =0.009n =0.013
R =0.250R =0.313
S =0.010S =0.006
Q = 5.1cfsQ = 5.0cfs
Capacity of Intake at Low Point
Formula
1/23/2
8.44*h + 8.25*h
Q =
I
h =d (ft) + A (ft)
h ==0.417
d =depth of flow=0.25
A ==0.167
=
Q
allowable flow intercepted by the intake
I
Solution
Q =
7.67cfs
I
THE PROPOSED STORMWATER CONTROL FOR THIS DEVELOPMENT
MEETS THE REQUIREMENTS OF THE URBAN DESIGN
STANDARDS FOR PUBLIC IMPROVEMENTS AND
I HEREBY CERTIFY THAT THIS ENGINEERING DOCUMENT WAS
PREPARED BY ME OR UNDER MY DIRECT PERSONAL SUPERVISION
AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER
UNDER THE LAWS OF THE STATE OF IOWA.
_______________________________________________________
VOLDEMARS LEO PELDS, P.E. IA. LIC. NO. 18842 DATE
MY LICENSE RENEWAL DATE IS DECEMBER 31, 2013
ADDITIONAL PAGES OR SHEETS COVERED BY THIS SEAL (NONE
UNLESS INDICATED HERE):_________________________________
________________________________________________________
PTIC - & WATER MAIN ARE
EAST SIDE OF BROADWAY ST.
D
ing Sign
k
OPTIC - & WATER MAIN ARE
EAST SIDE OF BROADWAY ST.
D
ing Sign
k
OPTIC - & WATER MAIN ARE
EAST SIDE OF BROADWAY ST.
D
rking Sign