SW8061037_COMPLIANCE_20061103

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
❑CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
PCOMPLIANCE EVALUATION INSPECTION
DOC DATE
_*iY/�/,/)z2
YYYYMMDD

WET DETENTION POND ANALYSIS
FILE NAME #VALUE
PROJECT # SW8 0(o to
PROJECT NAME
Receiving Stream
Classification
Index Number
Onsite DA, sf=
Offsite DA, sf =
Total Drainage Area
Built -Upon Area
Buildings/Lots, sf=
Streets/Parking, sf=
Sidewalk/Concrete, sf=
Other (Future), sf=
Offsite, sf=
Total Built -upon Area
rC'�r►� �1�� s a� R � �e� � R �1 �
Pond 1 Pond 2
NE Cape Fear
C Swp HOW
902411 00
902411 00 000
450000 00
6520500
26241 00
Surface Area
% impervious
60 00%
Design Depth, ft
750
TSS (85% or 90%)
90
SA/DA ratio
1 90%
Req Min Surface Area
17146
Volume Calculations
Design Storm, inches
1
Rational Cc=
067
Rational Volume, cf
50071
Rv =
0 590
Min Req Volume=
50071
Bottom Elevation=
2550
Permanent Pool Elev=
3300
Perm Pool Area=
5655000
Temp Pool Elevation=
3390
Temp Pool Area=
6044800
Total Volume Prov =
5264910
Forebay Volume
Permanent Pool Vol =
339300 00
Req Forebay Volume=
67860
Prov Forebay Volume=
Percent (22>%>18)
0%
Pond 1
Drawdown Orlfice/Weir
Avg Head, ft =
037
Average Flow Q2, cfs
0 296
Average Flow Q5, cfs
0 118
Q2 Area, sq in =
1462
05 Area, sq in =
583
No of Orifices
1
Orifice Diameter, in =
4
Orifice Area, sq in =
12 566
Weir Height, inches=
Weir Length, inches=
Weir C =
#DIV/01
Weir L', eff length=
-0 073
Avg Flowrate, O, cfs =
0 254
Drawdown, days = 2 3
#DIV/01
#DIV/01
#DIV/01
#DIV/01
#DIV/01
#DIV/01
#DIV/01
000
0
#DIV/01
Pond 2
000
#DIV/01
#DIV/01
#DIV/Oi
#DIV/01
0 000
REVIEWER
C Baker
Original Run Date 11/3/06
Last Modified
03-Nov-06
Pond 3
Pond 4
Pond 5
NE Cape Fear
NE Cape Fear
C Swp HOW
C Swp HOW
2776163 00
571889 00
2776163 00
571889 00
000
1095000 00
186710 00
106371 00
50 00%
75
90
1 50%
41642
1
059
136028
0 500
115673
2550
3300
194820 00
3375
198020 00
147315 00
1168920 00
233784
0%
Pond 3
025
0 669
0 268
4004
1602
1
6
28 274
195000 00
3886700
2348300
Pond 6
000
45 00% #DIVIO! #DIVI01
750
90
130% #DIV/01 #DIV/01
7435 #DIV/O! #DIV/01
1
055
26162
0 455
26162
2100
2850
4660000
2910
4870000
2059000
279600 00
55920
0%
Pond 4
024
0 151
0 061
929
372
1
3
7 069
#DIV/01
#DIV/01
#DIV/01
#DIVI01
#DIV/01
I
#DIV/01
#DIV101
#DIV101
000 1 000
0
#DIV/01
Pond 5
000
#DIV/01
#DIVI01
#DIV/01
#DIVIO!
0
#DIV/01
Pond 6
000
#DIV101
#DIV/01
#DIV/01
#DIV/01
0 000 0 000
#DIV/01
#DIVIOI
#DIVI01
#DIV/OI
#DIV/01
0 000
-0 050
-0 048
0000
0 000
0 000
0 473
0 115
0 000
0 000
#DIV101
28
26
#DIV/01
#DIV101

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