SW8060804_COMPLIANCE_20061018

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SWtD�(��lY'i
DOC TYPE
❑CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

INFILTRATION TRENCH ANALYSIS
Filename: S:IWWStormWaterlExces Spreadsheetsllntrench1060804.oct06
Project # SW8 60804
Project Name Wisteria. Medical, Center
Recvng Stream Silver Stream Branch
Drainage Basin Cape' Fear
Site Area 2.35 acres
Impervious Area Calculation
Buildings
11963
Streets
32561
OS Prkg
4771-:
OS sidewalks
Total
49295
Volume/Storage Calculation
If Rational Method is used, place a 1 in this box 0
Required
Provided
Design Storm
RV
Volume to Store
Pipe Diameter
Length Of a Single run of Pipe
Number of Pipe Runs in Trench
Storage In Piping
Total Storage in Piping
Cross -Sectional Area Of Pipe Runs
Length Of Trench
Width Of Trench
Height Of Trench
Cross -Sectional Area Of Trench
Voids Volume, 40%
Total Voids Volume
Total Volume Provided
Elevation Of Bottom Of Trench
Elevation Of SHWT
Overflow Elevation
Exfiltration Rate / Drawdown
Reported Hydraulic Conductivity
Bottom Surface Area
Drawdown Time
25 YEAR 24 HOUR STORM N/A
Intensity, i = .33 inches / hour
Qr=CiA=
Qp through the bottom of the basin=
Date 18-Oct-06
Reviewer CSB..
Classification C;Sw
Index #�
Drainage Area 61,663 SF
Acres
Rational Cc (list C after each BLIA)
1
1
1
1
% Impervious:
Cc: 0.84
1 in
0.77
3954 CF
Pipe Size 1 Pipe Size 2
2
792
1
2488 0
248:8€
79.9%
Feet
Feet
each
Cubic Feet
Cubic Feet
3.142 0.000 SF
70
45.5
2.19
99.65
0.00
1795
0
1795
4283
0.39 CFS
1.6633 CFS
Feet
Feet
Feet
SF
CF
CF
Cubic Feet
12 Mean Sea Level
10' Mean Sea Level
1.4.19 Mean Sea Level
•1.88 Cubic Feet Per Hour Per Sq Ft
3185.0 Square Feet
0.66 hours
Must be > Qr
10 YEAR 10 MIN HIGH INTENSITY EVENT
Intensity, i = 6.3 inches / hour
Volume for 10 yr. 10 min. event =
4492.32 CF <
4283 CF

CAPE FEAR RIVER BASIN
Name of Stream
Subbasin
Stream Index Number
Map Number
Class
Shaddox Creek
CPF07
16-43
E22NE9
WS-IV
Shade Branch
CPF19
18-68-2-11-1
H26SW4
C;SW.
Shaken Creek
CPF23
18-74-33-4
I28SW5
C;Sw
Shelbed Creek
CPF17
18-88-4
L27NW7
SA;HQW
Shelter Swamp Creek
CPF23
18-74-33-2-2
I28SE2
C;Sw
Shinn Creek
CPF24
18-87-25
K27NE5
SA;HQW
Sikes Mill Run
CPF19
18-68-2-10-4
H26NW9
C;Sw
Sills Creek
CPF22
18-74-29-4
I26NE5
C;Sw
Silver Lake
CPF17
18-82-1
K27NW9
C;Sw
Silver Run
CPF14
18-23-13-2
G21NE8
WS-III
,Si-lver.Stream_Branch
'CPF17=
c18r76-Y-1-
K27NW5
eC;SW•
Simlin Creek
CPF10
17-26-7
F20NP-7
C
Simmons Branch
CPFOB
17-10-(1)
019SE2
WS-IV:*
Simmons Branch
CPF08
17-10-(2)
D19SE2
WS-IV;CA:*
Simon Branch
CPF17
18-64-B
J25SEG
C;SW
Singletary Lake
CPF20
18-68-17-5-1
I25SW1
B;Sw
Sings Creek
CPF10
17-26-5-5-1
F20SW2
WS-III
Six Runs Creek
CPF19
18-6B-2-(0.3)
G25NE9
C;Sw
Six Runs Creek
CPF19
18-68-2-(11.5)
H26SW1
C;Sw,ORW:+
Skipper Hill Branch
CPF17
18-66-6-2
J26SW6
C;Sw
Skunk Creek
CPF11
17-40-1
F22NW2
C
Slash Branch
CPF14
18-23-16-6-1
F22SW7
WS-III
Smith Branch
CPF02
16-11-11
C20NW5
C;NSW
Smith Branch
CPF13
18-20-31
F23SE5
WS-IV
Smith Creek
CPF23
18-74-63
J27SE7
C;Sw
Smith Swamp (Jones Lake Drain)
CPF16
18-46-7
I24NE4
C
Smiths Creek
CPF10
17-34
E21SE8
WS-IV
Smiths Mill Pond Run (Smiths Mill Pond)
CPF18
18-68-12-14
I25NW2
C;Sw
Smokehouse Creek
CPF17
18-88-11
L26NE9
SC;HQW
Snows Cut
CPF17
18-87-31.5
K27SW6
SC
Snows Cut
CPF24
18-87-31.5
K27SW6
SC
Snows Marsh
CPF17
18-88-2
L27NW1
SC
South Buffalo Creek
CPF02
16-11-14-2
C19SW6
C;NSW
South Fork Cane Creek
CPF04
16-28-5
D21SW6
C,,NSW
South Prong Anderson Creek
CPF14
18-23-32-2
F23SWB
C
South Prong McLeod Creek
CPF14
18-23-29-1-2
F22SE6
C
South Prong Richland Creek
CPF09
17-22-2
E19SE3
C
South Prong Stinking Quarter Creek
CPF03
16-19-B-2-(2}
D20NE5
C;NSW
South Prong Stinking Quarter Creek (Kimesville
CPF03
16-19-8-2-(l)
D20NE5
B;NSW
Lake)
South River
CPF16
18-68-12-(0.5}
G24NW6
C;Sw
South River
CPF16
16-68-12-(8.5)
H24NE9
C;Sw,ORW:+
Southport Restricted Area
CPF17
18-88-3.5
L27NW4
SC
Spearmans Mill Creek
CPF19
16-68-2-15
H25SE6
C;Sw
Spring Branch
CPF16
16-46-3
H24SE7
C
Spring Branch
CPF18
16-68-12-2-4-1-2
G24NE2
C;Sw
Spring Branch
CPF23
18-74-63-1 e
J27SE7
C;Sw
Spring Valley Lake
CPF14
1B-23-6
F21SW9
WS-III,8
Squash Branch
CPF17
18-76-1-4
K27NW2
C;Sw
Squirrel Creek
CPF02
16-11-B-(1)
C19NEG
WS-III;NSW
Squirrel Creek
CPF02
16-11-8-(2)
C19NE6
WS-III;NSW,CA
Squirrel Creek
CPF09
17-22-6
E19NE6
C
Stagg Creek
CPF02
16-18-2-(0.5}
C21NE6
WS-II;HQW,NSW
Stagg Creek
CPF02
.16-18-2-(2)
C21NE9
WS-II;HQW,NSW,CA
Page 25 of 30