SW8041113_COMPLIANCE_20041104

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
El CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

INFILTRATION TRENCH ANALYSIS
Filename: S:\WPDATA\WQSkINTRENCH\041113-2.novO4
Project # SW8 041113-2.nov04
Project Name
Bell Cove Condos
Recvng Stream
Bogue Sound
Drainage Basin
White Oak
Site Area
5.016 acres
Impervious Area Calculation
Buildings
Parking/Asphalt
Concrete
Total
Volume/Storage Calculation
Date
18-Nov-04
Reviewer
L. Lewis
Classification
SA
Index #
WOK03 20-36-(0.5)
Drainage Area
35379 SF
0.81 Acres
Rational Cc (list C after each BUA)
8416 1
14294 1
605 1
If Rational Method is used, place a 1 in this box
Required
Provided
*Design Storm
RV
........................................
_Volune.fio:Stoce
"Town of Emerald Isle requires a 2" design storm.
Pipe Size 1
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%
Trench Volume per linear foot
Minimum Trench length required
Total Volume Provided
Elevation Of Bottom Of Trench
Elevation Of SHWT
Overflow Elevation
Exfiltration Rate / Drawdown
Reported Hydraulic Conductivity
Bottom Surface Area
Draw own :Tirhe
.........................................
25 YEAR 24 HOUR STORM NIA
Intensity, i = .33 inches / hour
Qr-CiA=
Qp through the bottom of the basin=
% Impervious:
Cc 0.73
0.19 CFS
0.3334 CFS
2 in
0.64
NP CF
65.9%
12 Mean Sea Level
10 Mean Sea Level
15 Mean Sea Level
0.4167 Cubic Feet Per Hour Per Sq Ft
2880 Square Feet
hours
Must be > Qr
10 YEAR 10 MIN HIGH INTENSITY EVENT
Intensity, i = 6.3 inches / hour
Volume for 10 yr. 10 min. event =
2232.58 CF <
4813 CF

INFILTRATION TRENCH ANALYSIS
Filename: S:\WPDATA\WQS\INTRENCH\041113-I.novo4
Project # SW8 041113-1.nov04
Project Name
Bell Cove Condos
Recvng Stream
Bogue Sound
Drainage Basin
White Oak
Site Area
5.016 acres
Impervious Area Calculation
Buildings
Parking/Asphalt
Concrete
Total
Volume/Storage Calculation
Date 18-Nov-04
Reviewer L. Lewis
Classification SA
Index # WOK03 20-36-(0.5)
Drainage Area 47786 SF
1.10 Acres
Rational Cc (list C after each BUA)
9408 1
18926 1
620 1
If Rational Method is used, place a 1 in this box
Required
Provided
*Design Storm
RV
Vaiue.t0:[Stoce
*Town of Emerald Isle requires a 2" design storm.
Pipe Size 7
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%
Trench Volume per linear foot
Minimum Trench length required
Total Volume Provided
Elevation Of Bottom Of Trench
Elevation Of SHWT
Overflow Elevation
ExIllltration Rate / Drawdown
Reported Hydraulic Conductivity
Bottom Surface Area
Drava sown : iM.0
25 YEAR 24 HOUR STORM NIA
Intensity, i = .33 inches / hour
Qr=CiA=
Qp through the bottom of the basin=
% Impervious:
Cc 0.68
2 in
0.60
ifi ? CF
Pipe Size 2
0.25 CFS
0.4167 CFS
60.6%
12 Mean Sea Level
10 Mean Sea Level
15 Mean Sea Level
0.4167 Cubic Feet Per Hour Per Sq Ft
3600 Square Feet
"S `: hours
Must be > Qr
10 YEAR 10 MIN HIGH INTENSITY EVENT
Intensity, i = 6.3 inches / hour
Volume for 10 yr. 10 min. event =
2839.37 CF <
6016 CF

SW8 041113 Bell Cove Condos
Subject: SW8 041113 Bell Cove Condos
From: Linda Lewis <Linda.Lew] [e-mail]>
Date: Thu, 18 Nov 2004 13:12:18 -0500
To: Ginger Turner <[e-mail]>
Ginger:
I was really confused for a minute. we have another Bell Cove project immediately
adjacent this project that is the commercial part of the subdivision under another
owner and from another engineer. I know that Vincent went up there to look at the
soils for the commercial part, but do not think he also looked at the condo part.
Do you know? If he did not, he'll need to schedule a site visit. Right now,
Vincent's open dates are after Thanksgiving- the 29th and 30th. I already have
another project in Brunswick County that he needs to look at on one of those days,
so his availibility is limited.
Linda
1 of 1 11/] 8/2 004 3:02 PM

STROUD ENGINEERING, P.A.
Hestron Plaza Two
151 A Hwy. 24
MOREHEAD CITY, NC 28557
[phone]
JOB
1
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DATE
CHECKED BY
DATE
SCALE
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STROUD ENGINEERING, P.A.
Hestron Plaza Two
.151 A Hwy. 24
MOREHEAD CITY, NC 28557
[phone]
job 'P1V\e(;5—S3 RIE:U_ Cb%/rl
SHEET NO. — 1Z OF, ES
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STROUD ENGINEERING, P.A.
Hestron Plaza Two
151 A Hwy. 24
MOREHEAD CITY, NC 28557
[phone]
JOB Pm LL C-cv 15
SHEET NO. OF —
CALCULATED BY 611-t. T- DATE J
CHECKED BY A .. DATE 1 12A
SCALE
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STROUD ENGINEERING, P.A.
Hestron Plaza Two
151 A Hwy. 24
MOREHEAD CITY, NC 28557
[phone]
INFILTRATION TRENCHES
gas
SHEET NO. 1 OF_..gv
CALCULATED BY DATE [ 2�1 t)
CHECKED BY DATE
SCALE
TRENCH SPACING = 1.5 X DIAMETER OF INFILTRATION PIPE X 2
PIPE
DIAMETER
(IN)
TRENCH -WIDTH.
(FT)
12
3
15
3.75
18
4.5
24
6
VOID RATIO NO. 57 STONE (e)= 0.4
SINCE a=Vv/Vs, AND SINCE Vt=VV+Vs, THEN SUBSTITUTING Vv=0.4Vs
"ASSUME TRENCQ IS THE SAME HEIGHT AS THE PIPE
PIPE
TRENCH AREA
PIPE AREA
TRENCH AREA
LESS PIPE AREA
VOID AREA
TOTAL AREA
12
3.00
0.79
2.22
0.63
1.42
15
4.69
1.23
3.46
0.99
2.22
18
6.75
1.77
4.98
1.42
3.19
24
12.00
3.14
8.86
2.53
5.67
36
27.00
7.07
19.94
5.70
12.76

STROUD ENGINEERING, P.A.
Hestron Plaza Two
151 A Hwy. 24
MOREHEAD CITY, NC 28557
[phone]
JOB
SHEET NO. —
CALCULATED
CHECKED BY
5—
OF — 6
DATE "Ile IPA
DATE v I . —
SCALE
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i33
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DRAINAGE EkSEWERAGE--HYDRAULIC COMPUTATIONS-4
1000
1
900
78
Exomo/e
:- Given discharge Q = 4. ¢ C. {. s.
700
�'ricfion {oc for n - 0,015
soo
slope of 010060,per, {oat
soo
Fin d
diameter /5 Inches and
aoo
ve /o ci �y of 3. 5 ft per second,
6y {o//owing clashed //tee.
300
200
.0001
2
120
.0001
0
z
108
.0002
O
u
96- 90
.0003 0002
`W
100
S4
78
.0004 .0003
90
-80
72
.0006 0004
3
TO
= 60
O .0008 . 006
IL
60
Z 84
O 0010 0008
V
SO
48
C 0010 0 /
4
LLJ
w
40
Z 4 2
0020 c
z
39
36
.0020
O.0030
30
Z
.1
L.
0040630
Z
IX30
0040 L-w
w .0060
v
20
27CL
-0-080, 6Q ..._._-©/iL
010eW oo
s
u
U
0 21
�I N :0100...
O
J
la
/
'
w
>
o
.0200
10
w I
0300 0200
8
9
# 0400 .0300
-y
Q !2
(S @ o. p�� .0600 .0400
9
/
0 10
.0800 .0600
10
3 /
.1000 .0800
I I
.1000
4
8
* � j1 © 1- Gl��c�U ✓
12
13
3
J
14.
115
6
NOMOGRAPH _ FOR
COMPUTING REQUIRED SIZE OF
CIRCULAR DRAIN FLOWING FULL
n = 0.013 OR 0.1015
D9
0.$
Ad a ptc d {rota Engineering Manual, War Deppartmeni, Corps o{Engineei's?
ParF.YW l'hac. /..Tune 1955.