SW8090117_APPROVED PLANS_20090310

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 Qqp \\I
DOC TYPE
❑ CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
Zoog6310
YYYYMMDD

DEVIA TIONS
FROM
DESIGN DRA WINGS:
DESIGN ASBUILT STATE MIN.
ORIFICE ELEVV, 150
15.13
TOP OF GRATE 16.5
16.83
EMERGENCY SPILLWAY 17.5
1 Z2
SURFACE AREA 20,519
19,779 16,639
WEIR CUT 16.1
16.4
POND SUMMARY:
NCDENR/DWQ PERMIT # SWB-090117
1. IMPERVIOUS AREA PERMITTED
193097 SF (4.43 ACRES)
2 NORMAL POOL SURFACE AREA
19,779 SF
3 NORMAL POOL ELEVATKAV
15.13
4. POND DEPTH (DEEPEST PO"
&1 FT
5. POND BOTTOM ELEVA71ON (DEEPEST POINT)
ZO
6. ORIFICE INVERT aEV4110N
15.13
7. OUTIET BOX CREST 8"A77ON
16.85
& STATE STORAGE VOLUME
16.4 CF
9. 10:1 FT WOETAIED SHELF
PRESENT
10. 10 FT ACCESS
PRESENT
i1. FOREBAY
PRESENT
12 PRIMARY SPILLWAY ELEVATION
16.85
13. EMERGENCY SPILLWAY a VARON
1Z2
14. ORIFICE SIZE
2 INCHES
15. *91? CUT CREST LENGTH
0.10'
16. HEIR CUT MAWN
16.4
17. SIDESLOPES (TYPICAL)
3.1
18. INV. OF PIPES FROM OUTLET S7RUCTURE
14.22 & 14.24
STATE WATER QUALITY POND CONSIDERATIONS -
SURFACE AREA REQUIRED = 20,519 SF
SURFACE AREA PROVIDED = 18,158 SF
1.5' STORAGE VOLUME REQUIRED = 24,026 CF
1.5' STORAGE VOLUME PROVIDED = 27,297 OF
1.5' STORAGE DRANDOBN TIME = 3.76 DAYS
■
18°RCP
(INLET ■
PIPE)
r
------------
\ ti
+17.49
r
+
.--_..----- 1 ♦ \
+17.87
+itZ\\9\ \' -17\\18{iti 1\ 1i ./ `/f` ♦\/\ r_
+it4/4
\ 87
'-+^'1^^6�.21
++77.84 +J�1�O51.
\ 'a- 14.942.Q +.a\``4? 15.16
\\\
♦♦
`♦
\h '\ \\\♦`\\` -,' , -i1A 18.16 15,04 +15,71 \\\\♦\
16.00 \L ±' -- - 1-ts.os ♦ \
i\ '\ ,5.96 / / 16.03 _ - / / / _ _13.80�,\
+17,72
+1'M4 - / / ''+.54 '' / ..'`I'�.87 \\ \\ \\ \\ \ \ `\ +17.88
+1 T25 \\ 15.49 / l / rrAJr r /.�'' r/r/ r`' `♦ \ `\\ \\ \\ \\ \\ \ 6.73G��
- \\ 1` + / � r aJ-' r/r ' '" rr `♦ \ ♦\ \ `�. 7 75.01 is \
It
4.96
V1.! / r' rr +7.56 \\ `\ \ `♦ �'�` 14..22
+0\ \ \ \
4s ` \ \ \ \ \
4-17.82 `\ \ 11 1 / rrr / r� ♦\ ♦\ \) ''♦\ `♦\ \\ \\ \\ `\
+17.42
\ ' \ t \ \ \ / ♦8 \ \\ \ \ \ \ \\
`0369 \\ \ \
7'X5'X3' OUTLET STRUCTURE: `♦\ ♦\\ \ \\ '\ '\ \\ \ \ \
TOP OF GRATE=16.85 ♦ \ \ \ \ \ \ 4aa.s6\ !
\+>s.fit� � INV = 14.22 \\ \ \\ \ \ \\ \\
2" ORIFICE INV = 15.13
t+t8.04 \\ '\ \ \\ 'j\��j\ \k �93 ----------
}7.94
4 i \ ♦ fir, �, � ``'-.____. _._ � \ i t \ \ \ 4-15.051
\\ \\ i.75.03 ` -F�� ,16^96„ �. - +�.70
INV `k1.24 `-t,6.5A h h 1,6,76+y i
\\ 6.4d� \ t6s2 �1V16E WEIR w --8�-_ 1 t 1 1 I
17.67 \ `.\ +9,97
IN
+17.65 �>> \,y . \ , i-`h3_4�^, _ +,9./' 2/1
. as ��.7Z--10--' f118.19'7ff I �n
(OUTLET ! �a
PIPES) as n.i ,\ .00 -12-""' % /ff / 15.o�/
aaa 17A1
17.01
INV=13.72 17.18 14.9a f
INV=13.76 1751 15.0 / f
WELDED BAR
TRASH RACK L= 16.85
FABRICATED GRATE 70P�/\
BOLTED IN PLACE
0.10 FT WEIR $4-
EL= 16.4
-
(2) 18' RCP
OUTLET PIPE
-�
WSEL = 15.13
- J1
10
3
2.0' PERFORATED
1
PVC GRAVEL
6 BASE
A
AND FABRIC FILTER
2 FT SUMP
FOR CLEANOUT
POND B07TOM
ELEV= 8.0 SECTION VIEW
WET BASIN
OUTLET STRUCTURE DETAILS
NOT TO SCALE
INV= � INV- 14.24
15.13 INV= 14.22
12`:BONC., .
OR GROUT
;
RIP -RAP EMERGENCY/ I
SPILLWAY EL TOP = 17.97 VEGETATIVE SHELF
EL BOTTOM = 17.20
TOP OR EMBANKMENT
ELEVATION = IZ97
AS -BUILT WET DETENTION BASIN
EMERGENCY SPILL WA Y
FRONT VIEW
NOT TO SCALE
+17.91
6
+17.84
+1 T66
+17.81
1
\
\
+19.9s
i.
i
r
+17.79
1
1 `\
17.60
/
/
j/,
RIP -RAP pPILLWAY
f
f
+16.66 +18.79
+ -
' ' r' -15- `♦ `\ `♦ UNABLE TO GET INLET PIPE
18.46+, i i' / ___ \ ` `♦ INVERTS (UNDER WATER)
I i+13.42
\
1 I I ! \ `♦ `♦ \` +18,62
A"-� ♦
17`6b+ \
I I I I +1c�95 y
16s4 1 , / 1 1+13..50 �` i i +,?s9 +18.77
1n.7n
1 11 13.96 ! r f
_
1 V,.6a
18.47 1 I 1 1 fl7.�9+!
i I I i
i I i I i 7 rn l I i-78.67
+13.92 +i 61
1+13.64
\\ +14 6 \ '
\ ` +,ass
+1 j19.3
\
'-+13.66
+ ` + 14/11
+18.51
t
1
I
1-119.05
1-19.51
EMBANKMENT TOP = 17.9
EMERGENCY SPILLWAY EL = 17.2
AS -BUILT EMBANKMENT SECTION
NOT TO SCALE
NOES
1. AS -BUILT LOCATIONS PERFORMED AND PROVIDED BY JOHN L PIERCE AND
ASSOCIATES, PA. DRAWING LABELED 'DETENTION POND RECORD DRAWING PREPARED
FOR MORTON TRUCKING OF NEW RIVER BEQ f632'
SIGNED AND SEALED BY JOHN L PIERCE L-2596
DATED 10-29-10
`o
1
LICENSE j C-2710 '
COASTAL
SITE
DESIGN, PC
ENGINEERING
LAND PLANNING
COMMERCIAL / RESIDENTIAL
P.O. Box 4041
Wilmington, NC 28406
[phone]
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DATE: 11-21-11
HORZ. SCALE: 1'- 20'
VERT.. SCALE: N/A
DRAWN BY. RLW
CHECKED BY.- HSR
PROJECT N0: 08-0198-632
DRAWING N0: 08-0198-P632
Sheet No. 01
.X'

DEVIA TIONS
FROM
DESIGN DRA WINGS:
DESIGN ASBUILT STATE MIN.
ORIFICE ELEVV, 150
15.13
TOP OF GRATE 16.5
16.83
EMERGENCY SPILLWAY 17.5
1 Z2
SURFACE AREA 20,519
19,779 16,639
WEIR CUT 16.1
16.4
POND SUMMARY:
NCDENR/DWQ PERMIT # SWB-090117
1. IMPERVIOUS AREA PERMITTED
193097 SF (4.43 ACRES)
2 NORMAL POOL SURFACE AREA
19,779 SF
3 NORMAL POOL ELEVATKAV
15.13
4. POND DEPTH (DEEPEST PO"
&1 FT
5. POND BOTTOM ELEVA71ON (DEEPEST POINT)
ZO
6. ORIFICE INVERT aEV4110N
15.13
7. OUTIET BOX CREST 8"A77ON
16.85
& STATE STORAGE VOLUME
16.4 CF
9. 10:1 FT WOETAIED SHELF
PRESENT
10. 10 FT ACCESS
PRESENT
i1. FOREBAY
PRESENT
12 PRIMARY SPILLWAY ELEVATION
16.85
13. EMERGENCY SPILLWAY a VARON
1Z2
14. ORIFICE SIZE
2 INCHES
15. *91? CUT CREST LENGTH
0.10'
16. HEIR CUT MAWN
16.4
17. SIDESLOPES (TYPICAL)
3.1
18. INV. OF PIPES FROM OUTLET S7RUCTURE
14.22 & 14.24
STATE WATER QUALITY POND CONSIDERATIONS -
SURFACE AREA REQUIRED = 20,519 SF
SURFACE AREA PROVIDED = 18,158 SF
1.5' STORAGE VOLUME REQUIRED = 24,026 CF
1.5' STORAGE VOLUME PROVIDED = 27,297 OF
1.5' STORAGE DRANDOBN TIME = 3.76 DAYS
■
18°RCP
(INLET ■
PIPE)
r
------------
\ ti
+17.49
r
+
.--_..----- 1 ♦ \
+17.87
+itZ\\9\ \' -17\\18{iti 1\ 1i ./ `/f` ♦\/\ r_
+it4/4
\ 87
'-+^'1^^6�.21
++77.84 +J�1�O51.
\ 'a- 14.942.Q +.a\``4? 15.16
\\\
♦♦
`♦
\h '\ \\\♦`\\` -,' , -i1A 18.16 15,04 +15,71 \\\\♦\
16.00 \L ±' -- - 1-ts.os ♦ \
i\ '\ ,5.96 / / 16.03 _ - / / / _ _13.80�,\
+17,72
+1'M4 - / / ''+.54 '' / ..'`I'�.87 \\ \\ \\ \\ \ \ `\ +17.88
+1 T25 \\ 15.49 / l / rrAJr r /.�'' r/r/ r`' `♦ \ `\\ \\ \\ \\ \\ \ 6.73G��
- \\ 1` + / � r aJ-' r/r ' '" rr `♦ \ ♦\ \ `�. 7 75.01 is \
It
4.96
V1.! / r' rr +7.56 \\ `\ \ `♦ �'�` 14..22
+0\ \ \ \
4s ` \ \ \ \ \
4-17.82 `\ \ 11 1 / rrr / r� ♦\ ♦\ \) ''♦\ `♦\ \\ \\ \\ `\
+17.42
\ ' \ t \ \ \ / ♦8 \ \\ \ \ \ \ \\
`0369 \\ \ \
7'X5'X3' OUTLET STRUCTURE: `♦\ ♦\\ \ \\ '\ '\ \\ \ \ \
TOP OF GRATE=16.85 ♦ \ \ \ \ \ \ 4aa.s6\ !
\+>s.fit� � INV = 14.22 \\ \ \\ \ \ \\ \\
2" ORIFICE INV = 15.13
t+t8.04 \\ '\ \ \\ 'j\��j\ \k �93 ----------
}7.94
4 i \ ♦ fir, �, � ``'-.____. _._ � \ i t \ \ \ 4-15.051
\\ \\ i.75.03 ` -F�� ,16^96„ �. - +�.70
INV `k1.24 `-t,6.5A h h 1,6,76+y i
\\ 6.4d� \ t6s2 �1V16E WEIR w --8�-_ 1 t 1 1 I
17.67 \ `.\ +9,97
IN
+17.65 �>> \,y . \ , i-`h3_4�^, _ +,9./' 2/1
. as ��.7Z--10--' f118.19'7ff I �n
(OUTLET ! �a
PIPES) as n.i ,\ .00 -12-""' % /ff / 15.o�/
aaa 17A1
17.01
INV=13.72 17.18 14.9a f
INV=13.76 1751 15.0 / f
WELDED BAR
TRASH RACK L= 16.85
FABRICATED GRATE 70P�/\
BOLTED IN PLACE
0.10 FT WEIR $4-
EL= 16.4
-
(2) 18' RCP
OUTLET PIPE
-�
WSEL = 15.13
- J1
10
3
2.0' PERFORATED
1
PVC GRAVEL
6 BASE
A
AND FABRIC FILTER
2 FT SUMP
FOR CLEANOUT
POND B07TOM
ELEV= 8.0 SECTION VIEW
WET BASIN
OUTLET STRUCTURE DETAILS
NOT TO SCALE
INV= � INV- 14.24
15.13 INV= 14.22
12`:BONC., .
OR GROUT
;
RIP -RAP EMERGENCY/ I
SPILLWAY EL TOP = 17.97 VEGETATIVE SHELF
EL BOTTOM = 17.20
TOP OR EMBANKMENT
ELEVATION = IZ97
AS -BUILT WET DETENTION BASIN
EMERGENCY SPILL WA Y
FRONT VIEW
NOT TO SCALE
+17.91
6
+17.84
+1 T66
+17.81
1
\
\
+19.9s
i.
i
r
+17.79
1
1 `\
17.60
/
/
j/,
RIP -RAP pPILLWAY
f
f
+16.66 +18.79
+ -
' ' r' -15- `♦ `\ `♦ UNABLE TO GET INLET PIPE
18.46+, i i' / ___ \ ` `♦ INVERTS (UNDER WATER)
I i+13.42
\
1 I I ! \ `♦ `♦ \` +18,62
A"-� ♦
17`6b+ \
I I I I +1c�95 y
16s4 1 , / 1 1+13..50 �` i i +,?s9 +18.77
1n.7n
1 11 13.96 ! r f
_
1 V,.6a
18.47 1 I 1 1 fl7.�9+!
i I I i
i I i I i 7 rn l I i-78.67
+13.92 +i 61
1+13.64
\\ +14 6 \ '
\ ` +,ass
+1 j19.3
\
'-+13.66
+ ` + 14/11
+18.51
t
1
I
1-119.05
1-19.51
EMBANKMENT TOP = 17.9
EMERGENCY SPILLWAY EL = 17.2
AS -BUILT EMBANKMENT SECTION
NOT TO SCALE
NOES
1. AS -BUILT LOCATIONS PERFORMED AND PROVIDED BY JOHN L PIERCE AND
ASSOCIATES, PA. DRAWING LABELED 'DETENTION POND RECORD DRAWING PREPARED
FOR MORTON TRUCKING OF NEW RIVER BEQ f632'
SIGNED AND SEALED BY JOHN L PIERCE L-2596
DATED 10-29-10
`o
1
LICENSE j C-2710 '
COASTAL
SITE
DESIGN, PC
ENGINEERING
LAND PLANNING
COMMERCIAL / RESIDENTIAL
P.O. Box 4041
Wilmington, NC 28406
[phone]
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7a 025483 r
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DATE: 11-21-11
HORZ. SCALE: 1'- 20'
VERT.. SCALE: N/A
DRAWN BY. RLW
CHECKED BY.- HSR
PROJECT N0: 08-0198-632
DRAWING N0: 08-0198-P632
Sheet No. 01
.X'

DEVIATIONS
FROM
DESIGN DRA WINGS:
DESIGN ASBUILT STATE MIN.
ORIFICE ELEV. 150
15.13
TOP OF GRATE 16.5
16.83
EMERGENCY SPILLWAY 17.5
IZ2
SURFACE AREA 20,519
19,779 16,639
MDR CUT 16.1
16.4
POND SUMMARY:
NCDENR/DWQ PERMIT # SW8-090117
1. IMPERVIOUS AREA PERMITTED
19087 SF (4.43 ACRES)
2 NORMAL POOL SURFACE AREA
19779 SF
3. NORMAL POOL ELEVATION
15.13
4. POND DEPTH (DEEPEST POINT)
81 FT
5. POND BOTTOM ELEVATION (DEEPEST POINT)
7.0
6. OPJRCE INVERT ELEVA770M
15.13
7. OUTLET BOX CREST ELEVATION
16.85
8. STATE STORAGE VOLUME
16.4 CF
9. 1R•1 FT VEGETATED SHELF
PRESENT
10. 10 FT ACCESS
PRESENT
i1. FOREBAY
PRESET
12 PRIMARY SPILLWAY ELEVATION
16.85
11 EMERGENCY SPILLWAY ELEVATION
17.2
14. ORIFICE SIZE
2 INCHES
15. WEIR CUT WEST LENGTH
0.10'
16. HEIR CUT ELEVATION
16.4
17. 9DESLOPES (TYPICAL)
J..1
18. INV. OF PIPES FROM OUTLET STRUCTURE
14.22 & 14.14
STATE WATER QUAUTY POND CONSIDERATIONS -
SURFACE AREA REQUIRED = 20,519 SF
SURFACE AREA PROVIDED = 18,156 SF
1.5' STORAGE VOLUME REQUIRED - 24,026 CF
1.5' STORAGE VOLUME PROVIDED = 27,297 CF
1.5' STORAGE ORANDORN TIME = 176 DAYS
WELDED BAR
TRASH RACK
BOLTED IN PLACE
C7 WSEL = 15.13
1
POND BOTTOM
ELEV= 8.0
0.10 FT WEIR
EL= 16.4
'2.0" PERFORATED
PVC W/ GRAVEL
AND FABRIC FILTER
18"RCP
(INLET ■
PIPE)
■
■ 17.74
17.50-----`t-., �•
in
,17.49
- - -
+17.87
+11.44
+17.84 l\-i{/181i ir15.87 j / t' ri I +9.30.-}}--- / /� . 115.87 +16.21
t \ t r ___1
\\\ i \t }\`� 1`l2�'1'0.__---+1L49" - f.'•/ -.p\ 15.16 14.94 \--
\Vt14'� 16.16 \15.04 �� +15.71 \^^\^\`♦ \\ CPS 16.14+
\`♦ `♦
16.00
1 t 15.96 16.03 -'' / �.. ,-1.3,80 , \ ♦ \
}17.72'-----`-16--
15.97
+77wa i' ''}154 /'' ,,rP0.87 \ `\ \\ \\\ �♦ \ \\ `\\ }17.86
\ /
+17.25 \ i5,49 / �.'' i ♦ \ ♦\ \ ♦ \ 5.01
\ .a
+7.56 `. `♦ \ `♦ `� 14,,22\
♦ �♦ . \ \ \ \
+17.42
7'X5'X3' OUTLET STRUCTURE: ♦\`♦ �`\ \\gyp �i \\+ `\ \\ \\ 16\ta
TOP OF GRATE=16.85 {7♦rg
INV = 14.22
2" ORIFICE INV = 15.13 ` `� \\ \\ \ \\ \t \t 1
tii-afi.oa 11, _93 -- 7sa
3 27^^ \
\} \\ i45N V�1f4. 4
17179
+ 2�` J6ti.10
.031+1.70 1\1 } ,il \\ i itl \\
6.aa� ^ '0"O.4',)VIDE WEIR � 1 } 1 1t3.75
`� \ i6s2
17.87 \ `.`\ \ ^ N1C-` 4fi.4 �F �_97
�. ^^ 11N.22 +T3,4�.. ".--- +P12i j
+77.65 \7 ��•`-. 3 i15,01 ..
18"RCP f••1 'Fifiol � ^'^�� +13.6 ��_ _t56s-
(OUTLET ` •___-2+i4.d2 +f . 4
PIPES) •` n.t` `s.00 -12-'- r i /
ls.o�r +lzso /1741
♦ • 1 14',� 14.26•r r r RIP -RAP 4PILLWAY
17.01
INV=13.72
INV=13.
16.85 FABRICATED GRATE TOP
SECTION WEW
INV= INV= 14.24
15.13 INV= 14.22
12'.&ONC' .
OR GROUT
(2) 18" RCP
OUTI-ET PIPE
6"BASE
2 FT SUMP
FOR CLEANOU7
WET BASIN
OUTLET STRUCTURE DETAILS
NOT TO SCALE
17.18 14.94
17.51 -f15.04 r ,
/ /
RIP -RAP EMERGENCY/
SPILLWAY EL TOP = 17.97 VEGETATIVE SHELF
EL BOTTOM = 17.20
TOP OF
AS -BUILT WET DETENTION BASIN
EMERGENCY SPILL WA Y
FRONT VIEW
NOT TO SCALE Al
^^ +,1 .7
/ +17.84 i
`+17.66
+17.91
I
I
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I
I
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1
l
IN
` LICENSE If' C-2710 '
COASTAL
SITE
DESIGN, PC
ENGINEERING
LAND PLANNING
COMMERCIAL / RESIDENTIAL
P.O. Box 4041
Wilmington, NC 28406
[phone]
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QWz
LLJ
-15- -" �♦ ``\ �♦ UNABLE TO GET INLET PIPE v1 j Cl::_ J
18.46+ , ,� -� \ `� ♦� `� INVERTS (UNDER WATER) tc ` v 0:: O W
o w O U 1n
+13.42 ♦/ \ ♦` \ O a WOU
+18.62
! i { +,Tss 4 1484A `��[J Q on
18.64 1 117.71 1+13.50 \\\ I 11 ! +111.59 +18.77 WQ r ` � o W
I I 1 1 `. I l /r ~ V U 3
i I i 13.96 1 1
7 rr r' o O
y.1 r ! r r
i I i `♦ � i / r
/ 1 r X
CAR1117.�9 !ESSp 1&66 y• y,
SEAL ' ;
025483
I I i l i l i � i �ti'• R P ���
1 1 r
I i +13.92 i 61 s.s7 'i��0�y' dG l NE���aN
1 +P7\�•
i l r l l / 1 1 \ \\ i R
1 1+13.64
1 1 ) I v V\ A V A
} W
1 1 7 t\\ 1 } \Y 17� 4, �+78.59
+ Q
+, 1t 93 } 1 \ O
I } \\ } \ 1 t
18.76 +I\ lA57
+^ +14/11
t-
1
+18.51
1
1
1
+t s.os
I-i 9.61 cr
IZC
o_
NT TOP = 17.9
NCY SPILLWAY EL = 17.2
O
OUTLET BOX = 16.85 Z
JT 16.4 STATE STORAGE 27,297 cf
. WSEL= 15.13 n W
NOiE3 ,Y
1. AS -BUILT LOCATIONS PERFORMED AND PROVIDED BY JOHN L PIERCE AND
ASSOCIATES PA. DRAWING LABELED 'DETENTION POND RE
CORD ORAWiNG PREPARED
FOR DATE. 11-21-11
MORTON TRUCKING OF NEW RIVER BEG /632"
SIGNED AND SEALED BY JOHN L PIERCE L-2596 HOR1. SCALE 1 "= 20'
= DATED 10-29-10 VERT.. SCALE: N/A
DRAWN BY. RLW
CHECKED BY.• HSR
EMBANKMENT SECTION PROJECT NO: 08-0198-631
NOT TO SCALE DRAWING NO., 08-0198-P632
20 10 0 20 40 60
SCALE IN FEET: 1"-- 20' Shaet No. of

DEVIA TIONS
FROM
DESIGN DRA WINGS:
DESIGN ASBUILT STATE MIN.
ORIFICE ELEV. 15.0
15.13
TOP OF GRAZE 16.5
16.83
EMERGENCY SPILLWAY 17.5
17.2
SURFACE AREA 20,519
19,779 16,639
HEIR CUT 16.1
16.4
POND SUMMARY:
NCDENR/DWQ PERMIT # SWB-090117
1. IMPERVIOUS AREA PERMITTED
193087 SF (4.43 ACRES)
2 NORMAL POOL SURFACE AREA
19,779 SF
3. NORMAL POOL ELEVATON
1513
4. POND DEPTH (DEEPEST POINT)
8.1 FT
5. POND BOTTOM BEVA71ON (DEEPEST POINT)
7.0
6. ORIFICE INVERT ELEVATION
15.13
7. OUTLET BOX CREST MA71ON
16.85
8. STATE STORAGE VOLUME
16.4 OF
9. 10.1 FT VEGETA7ED SHELF
PRESENT
10. 10 FT ACCESS
PRESENT
It. FOREBAY
PRESENT
12 PRIMARY SPILLWAY ELEVA71ON
16.85
13. EMERGENCY SPILLWAY ELEVA7ION
17.2
It ORIFICE 512E
1 INCHES
15 IOR CUT CREST LENGTH
0.10'
16. HEIR CUT ELEVA71ON
16.4
17. SIDESLOPES (TYPICAL)
3.1
1& INV. OF PIPES FROM OUTLET STRUCTURE
14.22 & 14.24
STATE WATER QUALITY POND CONSIDERATIONS -
SURFACE AREA REQUIRED = 20,519 SF
SURFACE AREA PROVIDED = 18,158 SF
1.5" STORAGE VOLUME REQUIRED = 24,026 OF
1.5' STORAGE VOLUME PROVIDED = 27,297 CF
1.5' STORAGE DRANDOW 7114E = 376 DAYS
WELDED BAR
TRASH RACK
BOLTED IN PLACE
p WSEL = 15.13
3
i�
POND BOTTOM
ELEV= 8.0
0.10 FT WEIR
EL= 16.4
'2.0" PERFORATED
PVC W/ GRAVEL
AND FABRIC FILTER
18"RCP
(INLET
PIPE)
t.74
1'i-5077_---_-
74
r
-INV=14.3814`.:3�\� ,,, . ,,Y+17,d9
� V
1
f /
+17.87
+'. b 44 1
,7/C
+17.84 `-T1Fyj'7i +(- 5-87 fr it '"�'.8' -`fb 4-16,21 `
� 4
�--h\ 75.16 w
! '\ 7 .vim -_.- ,1 q� ,- yr"1816 t45. Ci4
'"
�
t v
, t � } +13.3,2 " _ ,.- 56.U0 � V-L i_ _ _ .._--•�ae.ce
� 1
\
15.96
y-17.72 1 t` _ 5F-_. --. ..-\\ �� \\
" ` 15.97
\ \
\ \ •
-F19.ss
r -r-1,a BZ v v v
'x,4 r' � S4 / "}='�j.8 i � vv v� vV
vv � v Z� -{-77.8$
�.�' r
+17,25 e-d9
1 1496t
\ \
rT
+13;�5 r��' -F7.5S
+,i,49 A
{
\
ji b2 t
`
,
-59
,
v+
,1
�r�t 7'X5'X3' OUTLET STRUCTURE:
13 `'
TOP OF GRATE=16.85
r INV = 14.22
�j �_ 'il l +4 �,3 2" ORIFICE INV = 15.13
�1 �i
'i-M.04 1t �� },•itJ �l �k9-S3 _.._______-.._ i-:?.94
�� 11 11 ti
t
t -1.15 03 , 0ao _._. _
1� `1R
- _ +7.70 t ,1 4 1 '
7 {
. `!1.aa`� INV 24 ``th O.a, IDE WEIR92
t
} ��� •� ^.. �� NY� 46.4.-97
17s7 \
INV�Ik.22 i,.
`�,
d- 2i !
P 4
+1T65 .4�
,
18"RCP
(OUTLET
r+-17.60
,7.,v`
PIPES) � � �'`� 15.00
12-"-' ! r / 15.0«
/
!f
f r
f t
{ 4P 17.47
8,3
`"' '�-
rr
7`I-..-,14.2{'vr
RIP -RAP
1 - 71-
--...., �J
r
rSPILLWAY
+
INV=13.72 �
17.18'-'
,
/f
INV=13.76
1751
�17
17.04
RIP -RAP EMERGENCY
-- +17,84
SPILLWAY EL TOP = 17.97 VEGETATIVE SHELF
+17 66
-
EL BOTTOM = 17.20
+17.91
i
i
I
+17.81
113 R.5 FABRICATED GRATE TOP
SECTION VIEW
INV= INV= 14.24
15.13 INV= 14.22
92" .60NC.' .
OR GROUP
(2) 18' RCP
OUTLET PIPE
a:
6"BASE
2 FT SUMP }
FOR CLEANOUT
WET BASIN
OUTLET STRUCTURE DETAILS
NOT TO SCALE
TOP OF EMBANKMENT
ELEVA7ION = 17.97
4i
ELEV. = 17.2
AS -BUILT WET DETENTION BASIN
EMERGENCY SPILL WA Y
FRONT VIEW
NOT TO SCALE
+i8-66 +78-79
UNABLE TO GET INLET PIPE
18,48+ F� i __ INVERTS (UNDER WATER)
j� t7�7e �__14--` '-�J'1\ vv `v v`v
! ! + 13.42
I I I I V �v vv v +1 H.fi2
18,54 r .+13,50 v` t
f1 f ! +t -59
I 7-Ft8.77
f
. 1¢s8 !
tiibt i i ! ( +I +$.06
! r r
I ! !! +13.92 // I+17-61
1+13.64
+14-,06 ti ry v
+18,59
j
t
+1 St93 i k 1 �
a7s+i�s1 `,
t t ,
It+13,66 17 it }1
i t /7
t
4 - + 14/11 r t
/
f
7B5Q
r '
} r
1 1 fi.51
1
i
1
9A5
� 79,51
NOTES
1. AS -BUILT LOCATIONS PERFORMED AND PROVIDED BY JOHN L PIERCE AND
ASSOCIATES PA. DRAWING LABELED "DETENTION POND RECORD DRAWING PREPARED
FOR MORTON TRUCKING OF NEW RIVER BEQ #632"
SIGNED AND SEALED BY JOHN L PIERCE L-2596
DATED 10-29-10
LICENSE / C-2710 '
COASTAL
SITE
DESIGN, PC
ENGINEERING
LAND PLANNING
COMMERCIAL / RESIDEN77AL
P.O. Box 4041
Wilmington, NC 28406
[phone]
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DATE: 11-21-11
HORZ SCALE
VERT.. SCALE..
1'= 20'
N/A
DRAWN BY.- RLW
CHECKED BY.• HSR
PROJECT NO:
DRAWING N0:
08-0198-632
08-0198-P632
Sheet No. 1
0f

DEVIATIONS
FROM
DESIGN DRA WINGS:
DESIGN ASBUILT STATE MIN.
ORIFICE ELEV. 15.0
15.13
TOP OF GRATE 16.5
16.83
EMERGENCY SPILLWAY 17.5
17.2
SURFACE AREA 20,519
19,779 16,639
HEIR CUT 16.1
16.4
POND SUMMARY:
NCDENR/DWQ PERMIT # SW8-090117
1.
IMPERVIOUS AREA PERMITTED
193087 SF (4.43 ACRES)
2.
NORMAL POOL SURFACE AREA
19,779 SF
3
NORMAL POOL ELEVATON
15.13
4.
POND DEPTH (DEEPEST POINT)
&I FT
5.
POND BOTTOM ELEVATION (DEEPEST POINT)
70
6.
ORIFICE INVERT ELEVATION
15.13
7.
OUTLET BOX CREST ELEVARON
16.85
8.
STATE STORAGE VOLUME
16.4 CF
9.
10:1 FT VEGETATED SHELF
PRESENT
10.
10 FT ACCESS
PRESENT
It.
FOREBAY
PRESENT
12
PRIMARY SPILLWAY ELEYADON
16.85
13
EMERGENCY SPILLWAY ELEVATION
17.2
14.
ORIFICE SIZE
2 INCHES
15.
WEIR CUT CREST LENGTH
0.10'
i6.
NEiR CUT ELEVATON
16.4
17.
SIDESLOPES (TYPICAL)
3.1
16..
INV. OF PIPES FROM OUiLET STRUCNRE
14.22 Er 14.24
STATE WATER QUALITY POND CONSIDERATIONS -
SURFACE AREA REQUIRED = 20,519 SF
SURFACE AREA PROVIDED = 18156 SF
1.5" STORAGE VOLUME REWIRED = 24,026 CF
1.5' STORAGE VOLUME PROVIDED = 27,297 CF
1.5" STORAGE DRAW011N DME = .176 DAYS
18"RCP
(INLET
PIPE)
7.7c
17.5' _-.---'-"
�� ..
_INN=14.38� �. vv +1'7. hfl
i v A v
v
f + t
f t
+1787
G 4J t 1 A
+44 w
,-
i +4;',�,- '1-{t15.8' ,i3 +16,2'�
1
14-94
U 16 45.04
'5.96
.
i
> 1 r A4 F 13'."J4
1-17-88
\ + 1185
,
:17.82 ICJ
�iS
i
t
}
7'X5'X3' OUTLET STRUCTURE:
TOP OF GRATE=16.85
'\ q INV = 14.22
-a-7
2" ORIFICE INV = 15.13
\
, , i
't\
14-fz.oe `y A vv ;, o 't 993
v ,X
e
y
-h""51NV '1A.24 16�3869�-
,v wasv �,� 0l' IDE WEIR
.8 +7}.7o ry 1 1i§ 7b4
16-92
' NV, ' 46.4`'
17,87
\ IN V=4 .22
+17,65
+0.A-2f 1 !
1
18"RCP 4-
"b6,3-"
(OUTLET'
s4T.17,60
PIPES)
t150 /
/
`--.�
~'74-
7 ,-L. _
1A 2fy t RIP -RAP /SPILLWAY
ems# _
rr /-
INV=13.72z�
Ih .94 /
INV=13.76
r
/
�{ 7�
17,04
RIP -RAP EMERGENCY
-.-' +17,84-
SPILLWAY EL TOP = 17.97 VEGETATIVE SHELF
+17se r
EL BOTTOM = 17.20
i 7.8;
WELDED BAR
TRASH RACK ~
BOLTED IN PLACE L= 16.85 FABRICATED GRATE TOP
0.10 FT WEIR J4-
EL= 16.4
(2) 18" RCP
OUTL£T PIPE
OUSEL = 15.13 -
1
10
3
i 2.0" PERFORATED
PVC W/ GRAVEL 6"BASE
AND FABRIC FILTER 2 FT SUMP f
FOR CLEANOUT
POND BOTTOM
ELEV= 8.0 SECTION VIEW
WET BASIN
OUTLET STRUCTURE DETAILS
NOT TO SCALE
INV= � INV= 14.24
115.13 INV= 14.22
1
OR GROUT
a '
TOP OF EMBANKMENT
ELEVATON = IZ97
40 FT
ELEV. = 17.2
AS -BUILT WET DETENTION BASIN
EMERGENCY SPILL WA Y
FRONT VIEW
NOT TO SCALE
\
r
UNABLE TO GET INLET PIPE
INVERTS (UNDER WATER)
13.42
i-18-62
1 r \
t , ` -A 141f3�
t }
\
17,7h 1 � �"?,59 +1s.n \
i
( j
i `ti r f
i 1 13.96
1 t f /
7U.614 1
117.j +r +
t
i 1 �' 1 (+4761
+;ssz 1 i
i
! i f+13.64
i 1 \ +14`.,06 \ \�
t
18,59
r i
n�4+i
i
s i 1 i
}
1 e.7s si
,
1�+13.66
_ r
..E.` +4f11 f f'
i
f j f
-
--4} 7II 96
¢-1fl.51 i
i
1
i
3.C5
{..1es1
NOTES:
1. AS -BUILT LOCATIONS PERFORMED AND PROVIDED BY JOHN L PIERCE AND
ASSOCIATES, PA. DRAWING LABELED "DETENTION POND RECORD DRAWING PREPARED
FOR MORTON TRUCKING OF NEW RIVER BEQ ,y632"
SIGNED AND SEALED BY JOHN L PIERCE L-2596
DATED 10-29-10
20 10 0 0
11
LICENSE /# C-2710
COASTAL
SITE
DESIGN, PC
ENGINEERING
LAND PLANNING
COMMERCIAL / RESIDENTIAL
P.O. Box 4041
Wilmington, NC 28406
[phone]
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SEAL
a 025483 r;
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DATE: 11-21-11
HORZ. SCALE: 1"- 20'
VERT.. SCALE: N/A
DRAWN BY.- RLW
CHECKED BY: HSR
PROJECT NO., 08-0198-632
DRAWING NO: 08-0198-P632
Sheet No. 1 Of 1

4 � 5
C
0
Y. i Ifh�,�llIfIiII
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mm
•
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LEGEND
— - — — — — 20— — — — — — — EX. CONTOUR (MAJOR)
III) ----------------------------- EX. CONTOUR (MINOR)
(I .0 20 PR. CONTOUR (MAJOR)
PR. CONTOUR (MINOR)
= EX. STORM PIPE
III)
I PR. STORM PIPE
® PR. AREA DRAIN
DESIGN POINT
I L LABEL
0.29 RUNOFF COEFF.
0.97
Z
AREA(AC.) 2.5 10-YR BASIN FLOW
(CFS)
o
a
--- 0.24 _------------
_--------------------------------------- -- -------- ------------------ - -
--- ----- / - - ----
-- = - - 3- -
- - ---- 4 _ - - - _- _---------- --- - -
-------------------------------------------- -- ---- ----
- - - ---------------------- -------------- ------ --------------------------------------------- - ---- --
------ 2---------
T
321
1
f Z 0.28 0.21 20 •% ° 2 0.32
0.6 S 0.81 --
21 g 2.7 's- �3 ,
° o --
,
/ + i o 0
VL
It ov
\ •M•• \ it
-- ------ -- 0.77
U. o
0.27 7:::
2.2 0.13
\ W 0.23 0.53 3
/ 0.39
/ 1.7r7rifirrmril0.42 3 i<
0.39
- 1.7 0.64
14.4
\ 0.25 0.66 _I•
\
°
` •♦ ti,
055 ° o ° r
°8 3
2
° ° ° ° o o° ° oNOT
O O O O O° O O ° O O°°
O O O O° ° O O O O°0 0 °°
2
20
--------------------
-----------------
At
♦ , /
t
2 3 4
L
\� ------ - '
Ad
r3. , IF
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' DES - DRW CHK
FIRE PROTECTION
I I BRANCH A4AN0%6ER
CHIEF ENG/ARCH
I! I 2 1 m B
0
I I z -
! � APPROVED g � � X
— I { NORTH CAROLINA ENVIRONMENTAL a (n co w
I I MANt", EMENT { OMMi$$!ON Z (0 W
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'lVIWN !,`.F 1Nr,lE . :11;LIT z CL
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LLJ
/ CODE ID. N0. SIZE D NJ
H SCALE: AS INDICATED Q
NOR AU%IMO N0. _ Z
J08 ORDER N0. —
WORK ORDER NO. — C=>
0 20 40 80 CONSTR. CONTR. NO. ON
N40085-08-R-1411 r
NAVFAC DRAWING NO. XXXXXXX
Q
1 inch = 40 ft. Horizontal SHEET OF —
K
SHEET NO. m
EX1.1
N
5

I
9
I
rll\Lrl IV 1 VIVL/
397,376 SF (9.12 AC)
AREA TO FOREBA Y 1
145,923 SF (3.35 AC)
AREA TO FOREBAY 2
212,467 SF (4.88 AC)
ENGINEERING
LAND PLANNING
COMMERCIAL / RESIDENTIAL
COASTAL
SITE
DESIGN,PC
P.O. Box 4041
Wilmington, NC 28406
[phone]
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DES I DRW ICHK
FIRE PROTECTION
BRANCH MANAGER
CHIEF ENG/ARCH
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CODE ID. NO. SIZE D
SCALE: AS INDICATED
_ MMMO NO.
JOB IXZOER -
' + WORK ORDER N0.
CONSTR. CONiR. N0.
N40085-08-R-1411
NAVFAC DRAWING NO.
SHEET OF XXXXXXX
-- - SHEET NO.
EX1.2
C
C
0
ME
Ei
W
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0
0
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5
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1 2 3 4 5
- /---� f / / i i / / / / / / / / / / /
!I I I LEGEND
-20- - - EX. CONTOUR MAJOR
-. --- -- -- ..,. EX. CONTOUR (MINOR)
CONCRETE SIDEWALK JOGGING TRAIL i I I :I I 20 PR. CONTOUR (MAJOR)
CONCRETE SIDEWALK JOGGING TRAIL SEE SHEET C-702
SEE SHEET C-702 °^ i I I + i; i PR. CONTOUR (MINOR)
#� /iIj' I 0.6%
FINISH GRADE SLOPE
X 20.15 FINISH GRADE ELEVATION
EX. STORM
-'�� -- 15 PR. STORM PIPE
5
15 RCP - - - -- - - - _ _ ® PR. AREA DRAIN
(TYP.) STORM DRAIN PROFILE 'G' c- 02 c- 02 DOUGLASS ROAD C- 02 C- Ot - 15" RCP ��' 15 - _ - - - -- ® SPLASH BLOCK
- -- - T LIMITS TOR LE 'F' ''
_- SEE SHEET �.` EOP EDGE OF PAVEMENT
1 PROJECT TS 02 C 01 �
\._ -/j - -- -_ _.. --.- _. - ------ ----...-... -- ------ ------------- ---- - -------- - - - - - - - - FL FLOWLINE
M DRAIN PROFI ,
SEE SHEET C 301
- ---...---Y - -
_-0--.- SPILL LINE
- _ W 15" RCP ---_--- *�^.-1 _: -- - __-- ---- ---- - _ -._----- I..::
- TG TOP OF GRATE
I 5 _. _.- STORM DRAIN PROFILE 'H'- - - - - - -... _ _ = _ _ _ - - _ __ .._ .- _. _ - -
PROJECT LIMITS a x z �:< _ - - -- - - -. - .-- - - - - --
I C- 02 C- 02 SEE SHEET C-301 15a - -STORM DRAI# PROF1tE 'f L - `C- 02 C- 01 - - - - _, - - - HEAVY-DUTY CONCRETE
' n; - - - - , �c c , SEE SHEET C-301 20 rj - -t_. lJ - HDC
SW SIDEWALK
i C- 02 C- Ot �, 22 - - -. (Tl'P.) L�- r
2TYP1 \\ 5 2 C- 02 C- 02'_I;!- HW-1 CONCRETE HEADWALL NO.
i
"` _ C- 02 C- 02
CB-1 CATCH BASIN NO.
-20 yy_ „
1 / \ 20 � ` W --21 22 F FLARED END SECTION NO.
( )
I /
r 21�,fi 15" RCPr ; \
\`aG STORM DRAIN PROFILE 'I' �, /, I V ' I ® CONCRETE SIDEWALK
- J 22 S S -301 - - _
Y G Q�
EE HEET C e
_ r attic k; , s FIRE ACCESS
-�3 E
i
n RIGID CONCRETE
�i \ PAVEMENT
\ ti B \4 Pi:2 ..30:
c? O _ HEAVY-DUTY RIGID
/ / 02 C-D0_r
I i
.. i • ', \ \' j :: - 1 �'^: � , ' �"�%�;„" PAVEMENT
NOTES:
\ o C- 02 C- 01 D { )' a / 1. SEE SHEET C-103 FOR EROSION
C ® I CONTROL MEASURES.
_TYP. �J 2. GRADING IN LANDSCAPE AREAS AT
( �' n RCP �/ // I BUILDING TO BEGIN 0.5' BELOW FINISHED
X CB-1 ww FLOOR.
t •I: : T M PRO CB- 11 /
CB- 5 E SHE C- 02 C- 01 I 3. REFER TO ARCHITECTURAL PLANS TO
~ ( \ VERIFY DOWNSPOUT AND SPLASHBLOCK
..
®( ) I LOCATIONS.
C- 02 C- 02 r.
JLIli �Ei:;:: E CB-
O <v s -»• o
/ : {GYP• Q !� PROJ T L'IMIIIS
C=
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t� ryo
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\
1�� ! - _ `NAAr20LINn ENVIRONMENTAL FIRE PROTECTION
9 --� Q \\ \ .�.'o� C- 02 C- 02 _l� „ CEMENT C ,
Q I 0MMISSION BRPNCN MANAGER
I I I FE-1' 10 tvQ�ci 5 / 2 �'- (VISION O)IF WATt(;' QUALITY CHIEF ENG/A�
I I C- 02 C- 01 \ ., \l ? 1 - 3�1� loq n
V <v - -
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C- 02 C- 02 I
_ �o I / / I n Z Z
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C- 02 C- 02"RCP - - - W CO
p \ 1 O - / / STORM D 8 N PROFILE 'J� \ I - - - -- - - - -` 1 Z a
\ W
SEE SHE C-301 29 CC Q
��PRO LIMITS \ - - \ C- 02 C- 01 l� 15 L - - - - - - -< In Z
( ) C- 02 C- 02 L - Q
\ \ \ \\ 20' FIRE ACCESS 0a W
\ I 6.00' SPORTS � W
WALK COURT
\ ; 1 inch = 40 ft. Horizontal 0
OS-1 i Z
CONCRETES STORM DRAIN PIPE SCHEDULE oc O U)
BUILDING PAVEMENT w Z M
UP Q
DOWN UP DOWN w
RUN SIZE/ STREAM STREAM LENGTH STREAM STREAM Z W ZQ
\\
ASPHAHEAVYLT NAME MAT'L NODE NODE (FT) INV. INV. SLOPE Z cr Z
SECTION D A 15" RCP CB-2 CB-1 101.98 16.07 15.56 0.50% U) r O Z
15 RCP CB-1 FE-1 192.67 15.46 14.50 0.50% W z W 0 zo
\, \ WETLANDS �® \ SEESF�E�T C-503\ PROJECT LIMITS TRASH ENCLOSURE
w J 00 a
\\ \ \\FOR PROFJLE \ I B 15" RCP CB-3 HW-1 176.51 18.52 17.64 0.50� = o
- _ RE: ARCH. U Q 0 UE
C 15 RCP CB-8 CB-7 74.90 18.21 17.84 0.50%
_ 9 \ I 15" RCP CB-7 CB-6 92.40 17.74 17.28 0.50% U- a m W o
A - gKl}b}}NOy� -\j+iEAA* DUTY - - - 15" RCP CB-6 CB-5 53.17 17.18 16.91 0.50% Q I A III. U
CONCRETE CONCRETE 15" RCP CB-5 CB-4 54.05 16.81 16.54 0.50% Q v a
PAVEMENT
18" RCP CB-4 FE-2 156.12 16.29 15.50 0.50% Z
CONCRETE FIRE 6.00' SPORTS SECTION E
" CODE ID. N0. SIZE D N
D 15 RCP CB-9 CB-5 78.99 18.50 16.76 2.20%
TRASH CURB AND ACCES WAL_K_[_ COURT v� SCALE: AS INDICATED Q
10.00' 16.67' E 15" RCP HW-9 HW-10 20.50 17.52 17.42 0.50% LWIMO NO, Z
ENCLOSURE GUTTER MOTORCYCLE HEAVY DUTY
RE: ARCH. _ F 15" RCP HW-11 HW-12 48.58 16.95 16.42 1 JOB ORDER NO. -
- - - - - CONCRETE RIGID ONCR TE KING CONCRETE rn - ---- -� .. '. .' , "•. -' '. " WORK ORDER NO. - O
_ BITUA�fN01>-S PAVEMENT G 15 RCP HW-5 HW-6 36.71 17.98 17.77 0.55% o
RIGID CONCRETE HEAVY-DUTY EAVY-DUTY " CONSTR. CONTR. NO. N
_ CONCRETE H 15 RCP HW-3 HW-4 52.08 18.85 18.59 0.50% N40085-08-R-1411
BITUMINOUS HEAVY DUTY - _ PAVEMENT RIGID PAVEMENT ASPHALT :..: "' "' r
CONCRETE RIGID PAVEMENT PAVEMENT
- - - - - - - - - - - - - - - 1 15" RCP HW-7 HW-8 29.92 19.96 19.81 0.50% NAVFAC DRAWING NO. Q
CONCRETE PAVEMENT J 18" RCP HW-2 FE-3 153.22 17.23 15.50 1.13% sHEEr No. SHEET OF XkXXXXX ILL)
AND SECTION A SECTION B SECTION C SECTION F _
GUTTER POND
OUTFACE 2RCP" OS-1 FE-4 30.00 14.00 13.80 0.67% `-' - 1 02 v
N
1 2 3 4 5

L 0 M Tl ON MAP
I
C
11
PLANNED EROSION AND SEDIMENT CONTROL PRACTICES —
CE 1. TEMPORARY GRAVEL CONSTRUCTION ENTRANCE
Practice 6.06
Shall be installed at the entrances to the project
from an existing roadway. Drainage should be away from
the road and erosion will be controlled with downstream
practices. During wet weather it may be necessary to wash
truck tires at these locations.
LAND GRADING
Practice 6.02
Grading should be limited to areas as shown on the
Plans. Cut and flit slopes shall be 3.1 or flatter except
where specifically Indicated. Care shall be taken during
land grading activities not to damage existing trees that
are Identified as 'to be preserved'.
SEDIMENT FENCE
Practice 6.62
Sediment fencing should be Installed as shown on the
Plan, to delineate and protect wetlands and specified areas,
and around any temporary stockpile areas as necessary to
prevent any graded Interior areas from eroding onto adjacent
lands or roadway, or Into inlets, or as directed by Engineer
or NCDENR/LQS personnel.
GC 4. GRASS —LINED CHANNELS
Practice 6.30
Ali overflow swales to be ggraded to design
configuration seeded, and stab if necessary wi
temporary s{row—net liners to collect and convey si
as shown on Plan. After final project stabilization,
be re —graded and cleaned of siltation as needed to
original design contours for stormwater conveyance.
OP 5. OUTLET STABILIZA71ON
Practice 6.41
th
to water
swales to
establish
Riprap aprons will be located at the downstream end of
all discharge pipes to prevent scour.
CONSTRUC71ON ROAD STABILIZATION
Practice 6.80
Upon reaching final grade and after utilities have been
Installed, roadway%parking areas are to be stabilized by placing
sub —base course of approved 4' marl stone or 6' ABC, as shown
in the typical street cross—section detail on the Plan, to
reduce erosion and dust during the remainder of building
construction.
$B 7. SEDIMENT BASIN
Practice 6.61
The Sediment Ba in is to be constructed first (see
Construction Schedule) and is the primary Practice to
prevent sediment from leaving the site. Detailed design and
spillway configurations are specified in the detail sheet.
SK 8 SKIMMER
P tl 6 64
rac ce
A sedimentation basin dewatering control device that withdraws
water from the basins water surface, thus removing the highest quality
water for delivery to the uncontrolled environment.
INLET PR07Ec71ON
Practice 6.51
A temporary measure of wire —mesh hardware cloth around
stool postseLporHng washed stone placed around the opening
of a drop /n
CONSTRUCTION SCHEDULE —
1. Obtain approval of Plan and any necessary permits, and hold
a pre —construction conference prior to commencing any work.
2. Flag work limits and stake —out roads and storm drainage
structures for preliminary grading.
3. Install Gravel Construction Entrances.
4. Install sediment basin, skimmer and silt fencing as shown on
plan prior to clearing and grubbing site.
5. Construct grass lined channels,
and any other sediment control practices shown, prior to
rough grading roadways, site and stockpiling topsoil as necessary.
6. Install utilities In roadway/parking lot, establish final grades
and stabilize road/parking lot with stone base course.
7. Final grade, install non —municipal utilities as needed, and
vegetatively stabilize areas where building construction is
not imminent.
8. All erosion and sediment control Practices are to be
Inspected weekly and after any rainfall, and repaired as
necessary.
9. Upon completion of construction, the roadway/parking lot
Is to be paved, and all areas permanently
vegetatively stabilized. After site stabilization, temporary
measures are to be removed.
MAINTENANCE PLAN —
All measures to be Inspected weekly and after any rainfall
event and needed repairs made Immediately.
Sediment Basin to be cleaned out when the level of sediment
accumulates to 1.5' above pond bottom, 1.1' above forebay 1
bottom and 1' above forebay 2 bottom.
Sediment to be removed from swales when they are approximately
50X filled or sediment level Is with 1' of top of ditch bank.
Sediment to be removed from behind any Silt Fence and
inlet protection devices when it becomes 0.5' deep. Fencing
and Inlet protection to be repaired as needed to maintain a
All seeded areas shall be fertilized mulched, and re —seeded
as necessary, according to specifications provided, to
maintain a suitable vegetative cover.
Construction entrance to be maintained In such a manner as to
prevent mud or sediment from leaving the construction site.
Periodic topdressing with 2—Inch stone may be required.
Inspect after each rainfall and immediately remove all
objectionable materials spilled, washed, or tracked onto
public roadways.
VEGETATIVE PLAN —
1. Permanent vegetation to be established in accordance with
North Carolina Erosion and Sediment Control Planning and
Design Manual, Section 6.11, latest version. See Sheet C-506.
ilkCOASTAL
SITE
DESIGN,PC
ENGINEERING P.O. Box 4041
LAND PLANNING Wilmington, NC 28406
COMMERCIAL / RESIDENTIAL [phone]
L
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DES I DRW ICHK
FIRE PROTECTION
BRANCH MANAGER
CHIEF ENG/ARCH
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NAVFAC DRAWING NO.
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SHEET OF XXXXXXX
SHEET NO. m
C-103
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181
CI
I
1 i
2 I 3 I 4 I 5
RADIUS 17.5 FT 11
/ LENG = 14.2-��9 Z D
I B8
� �
\ 12 CY 0 II RIPRAP / LENGTIN 4_7.9 FT ADI11S = 1Q0 FT ZO I
1,5 FT DEEP\ ` 6 FT \ f
GE07EX NONWOVEN FFHIL,7ER FABRIC ` _
PLACED UNDER RIP / , 1 c� 11 RFRAP \ \ \ \ \ LENGTH = 6.9 FT
RADIUS ` 17.5 Fr�157 LF 18' N RCP /
LENGTH"-- .3 FT \ �. _
�\RADIUNCTi+ = ai'�r � �� �.
RADIUS = &0 FT
asFT3. R�RAP LENGnN = fa5 FT `�
RADIUS
RADIUS = 2 . FT \FQREBAY 2 NET INCLUDED 153 LF 18' a IN RCP FT if. G1H --
\\\ \ = I1�N 7HE VOLUME OR
BOPoNG 4 SURFACE _ "�-
• _ _..... \ \ CUUnONS Fat( THE MAIN
US 2,
=, FT - - - - - - - - - - - -
\
Gifl = 31.4 EX ELEI
\RADI= 128
FT �-
--� \ \ SHOUT = f0' BOTTOM ELEV = 9.0 \ r \ BORING 2
EX FOREBAY 2 NTELEV188 ZQ8
_\ 4^n'
\ \ \ BQRNNG 3 1, BOTTOM ELEV� - 15
PERMANENT POOL ELEVATI1ON = IkO �� \ \ \ EX SH=1 . \ \ PP = ISO \
SURFACE AREA 0 ELEV. 15.0 = 20,519 SF I
�. 20 FT SP9�INAY RADIUS = zo T
TEMPORARY POOL ELEVATION - 16.1 \ \ ELEV. = 180 LENGTH = 7.0`FT t /
L CY a N RI, o is 3o so
SURFACE AREA 0 ELEV. 16.1 = 24,561 SF D \ 1.5 FT DEEP j
STORAGE 0 ELEV. 16.1 - 15402 CF / GEOIEK�� LW�1R'p � FABPoC n _ '
RAzs, I7. FT ) ✓O J
11.7 �- LENGTH = 3Y,3 J J 1 inch = SO ti Horizontal
86 Fr
\ \ (2 30 LF 18' a. 111 RCP' ,� _ ,�. / i
\` kw 0 o 1 %9fT 315 fTFr
� LENG = 10.5 FT NOTES:
\ ` 40 SP9.LWA \_ 1. ALL BUtD1NG ROOF DRAINS MUST BE DWC1ED MID THE STORM DRAINAGE COLIEC170H
SYSTEM OR MID RE SIREET/PARIONG LOT.
\t R�RM�� i _ 2 PORTABLE PUMP 70 BE USED TO DRAIN POND IN CASE OF EMERGLNCY. PUMP 70 BE _
1.5 FT \PLACED ON TOP OF BERM WTH IE = 118 n-SEEP COLLAR \ GE07EX NONWO FILIER FABRIC I % HOUSE OUTLET 10 DRAW ACROSS STABLE UPLAND AREA CEYT RESI�EIMON.
5 CY a 9 RFRAP SEE DETA9: THIS SHEET \ PLACED UNDER
�. .GEOTEX NONWOVEN FlL7ER FABRICL \ WET -BASIN DETAIL 1 sroESOPEs ID PERMANENTLY VEGETATIVELY STABILIZED1xIH SEEDoR SOD.
J \ PLACID UNDER RIP RAP \ \
WETLANDS VEGETATION NOTE. -
THE FOLLOWING SPECIES OF WETLANDS VEGETATION ARE SUITABLE FOR
PUNTING ALONG THE 10.1 VEGETATED SHELF-
- S49TTARIA UTIFOUA (COMMON ARROWHEAD)
- SAGITTAPoA LANCIFOUA (DUCK POTATO)
- SAURURUS CERNUUS (LIZARDTAIL)
- PELTANDRA WRONI04 (ARROW ARUM)
IF ONE OR MORE OF THE SUGGESTED SPECIES IS UNAVAILABLE, APPROPRIATE
WETLANDS VEGETATION COMMON TO THE COASTAL NORTH CAROLINA REGION
MAY BE SUBSTTUTED.
NOTES:
1. TEMPORARY SKIMMER TO BE INSTALLED ON PRIMARY OUTLET STRUCTURE BOX
AND TO REMAIN IN PLACE UNTIL S17E IS PERMANENTLY STABILIZED PER NCDENR/LOS
SEDIMENTATION AND EROSION CONTROL PERMIT. SEE SKIMMER DETAILS FOR INSTALLATION.
Z ORIFICE/SKIMMER ASSEMEBLY AT OUTLET STRUCTURE TO BE TEMPORARILY COVERED WITH
WIRE AND 57 STONE UNTIL SITE IS STABLE
21
WELDED BAR
TRASH RACK EL= 16.5 FABRICATED GRATE TOP
BOLTED IN PLACE
90 ELBOW DOWN 0.1 FT WEIR 4
8'BELOW WSEL EL= 16.1 L�p
5'
WSEL = 15.0
10
SB
3
O
1 � 2.0" PERFORATED
PVC W/ GRAVEL EL,= 10.5
(2) 18' RCP S
OUTLET PIPES
NOTE: COLLAR TO BE POURED AFTER
PIPES ARE IN PLACE.
REINFORCING AS NECESSARY.
WET BASIN
ANTI -SEEP COLLAR
NOT TO SCALE
FABRICATED GRATE TOP
6 FT x 4 FT BOX BUILT ON SITE
6'BASE
AND FABRIC FIL7ER T
POND BOTTOM IT
ELEV- 9.0 SECTION VIEW SKIMMER = 3.0' SIMMER WIN 2.8' ORIFICE
WET BASIN
OUTLET STRUCTURE DETAILS
NOT TO SCALE
GALVANIZED, OR
EQUIVALENT
2 FT SUMP
FOR CLEANOUT
INV=
15.0 l INV_ 14.0
1
1
12 :GONG:, .
OR GROUT
;.
WELDED FABRICATED TRASH
RACK W/SQUARE OPENINGS
< "
-
MEN
OMMEMEEMEN
MMEM■N■■N■,
■■■■■■■M■N.
S■EM■N■E■E.
■EE■■N■■■■.
6-0"
�o
SEE DETAIL
THIS SHEET
FOR
TRASH RACK
7'- Or 0 0.1 FT WEIR CUT
GRA�PLAN WEWVIEW w BOX PLAN VIEW
WET BASIN
OUTLET STRUCTURE DETAILS
NOT TO SCALE
CALCULATION SUMMARY FOR DWQ:
IMPERVIOUS AREA PERCENTAGE:
TOTAL AREA DRAINING TO POND - 397,376 SF (9.12 ACRES)
TOTAL IMPERVIOUS = 193,087 SF (4.43 ACRES)
PERCENT IMPERVIOUS = 48.6X
FT REQUIRED SURFACE AREA:
AT 4.0 FT OF DEPTH, 90X TSS REMOVAL, SA/DA = 4.19
0.0419 x 397,376 = 16,639 SF SURFACE AREA REQUIRED
SURFACE AREA PROVIDED = 20,519 SF
1.5 INCH VOLUME.
I-48.6
Rv - 0.05 + 0.009 x I = 0.05 + (0.009)(48.6) - 0.49 IN/IN
MINIMUM VOLUME - DESIGN STORM x Rv x DRAINAGE AREA
_ (1.5/12)(0.49)(9.12) - 24,206 OF
1.5 INCH STORAGE VOLUME AT ELEVATION 16.0 - 25,402 CF
2 TO 5 DAY DRAW DOWN:
AVERAGE HEAD FROM STORAGE ELEVATION
TO ORIFICE INVERT = 16.1 - 15.0 2
- 0.55 FT
2.0 INCH PVC ORinCE: Q = CA 2 h "1 2 = 0.6(0.55)(64.4 X 0.40) 1/2
= 0.07787 CFS
T - 326.232 SECONDS - 3.78 DAYS
FOREBAY REQUIREMENTS
MINIMUM FORESAY VOLUME = 20X OF PERMANENT POOL VOLUME
- 0.2 x 84,120 CF
- 16,824 CF
TOTAL FOREBAY VOLUME PROVIDED =
FOREBAY 1 1 5,275 CF
FORESAY / 2 = 29,030 CF
o
n
ITIM1*1
4B.0 FT
WET BASIN
EMERGENCY SPILLWAY
FRONT VIEW
NOT TO SCALE
or
ALL SLOPES
3.1 MAXIMUM 33
10' 10'min. 21.5'min. SEE PLAN o a
FOREBA VOLUME II
POND OF REQUIRED r
= i�_ STORAGE, TYPICAL o
0, '4
3min. &p OUTLET PIPE
OUTLET
Lo PROTECTION
AS ON PLANS
(TYPICAL AT ALL STORM OUTFALLS TO POND)
FOREBAY 1 SECTION DETAIL
NOT TO SCALE
ALL SLOPES
I I MAXIMUM
10'm1n. 21.5'min. SEE PLAN Z
o a
Mi
FORESAIY VOLUME
OF REQUIRED
STORAGE, TYPICAL p
e WSEL = 1 .
cn
31mh• ,a �P ` OUTLET PIPE
Lop BOTTOM- 0
OUTLET
PR07EC77ON
AS ON PLANS
(TYPICAL AT ALL STORM OUTFALLS TO POND)
FOREBAY 2 SECTION DETAIL
NOT TO SCALE
10'
14'
21'
16'
EMBANKMENT TOP=
18.0 (SETTLED), = 18.25 (CONSTRUCTED)
EMERGENCY SPILLWAY - IZO
�Yl
TOP OF GRATES - 16.5
WEIR CUT/ (STATE STORAGE) - 16.1 STATE STORAGE = 25.402 CF
NORMAL 15.0 MIDD OF 10, 1 SHELF)
3
LF 18
-
, -
Gt 0:1 SHELF EL- 14.5
BOTTOM OF 1 -
a
,U ANTI -SEEP COLLAR, BOTTOM EL- 1Z4
BOTTOM SWM STRUCTURE EL- 10.5
SEDIMENT CLEANOU7 EL. = 10.5
ram,
BOTT = 9.0 ............ ........
20'
10'
WIDE
10.1 SHELF
VARIES 38'
EMBANKMENT SECTION
NOT TO SCALE
I
r.�
No. C11912 I*
I
DES I DRW ICHK
ARE PROTECTION
BRANCH MANAGER
CHIEF ENG/ARCH
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P.O. Box 4041
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Wilmington, NC 28406 � LL
[phone] Q
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CODE ID. NO. SIZE D N
SCALE: AS INDICATED J
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JOB ORDER NO.
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WORK ORDER NO. - O
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CONSTR. CONTR. NO. N
N40085-08-R-1411 r
NAVFAC DRAWING NO. <
a
SHEET OF XXXXXXX CY
SHEET NO. 07
C- 503
N
4 ' 5

4 � 5
I
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Outlet Stabilization Structure
specification If 6.41 - Construction Specifications
1. Ensure that the subgrade for the Star and riarap follows the required Ines
and grades shown in the plan. Compact my fit required in the subhy'ade to
the density of the surrounding undisturbed material. Low aeeas in the
subgrade an undisturbed sod may dso be filed by Increasing the rprap
thickness.
2 The riprop and gravel star must conform to the spedfied grading [knits
shown on the plans.
J. Filter cloth, when used, must meet design requirements and be properly
protected from punching or tearing during installation. Repair any damage by
removing the rfprap and placing another piece of star loth over the
damaged area All connecting joints should ova* a minknum of 1 it If
the damage is extensive replace the entire liter cloth.
4. Rgrop may be placed by equipment but take care to avoid damaging the
}star.
5 As mhknum thickness of the rgrep should be 1.5 tines the maxknum stone
diameter.
6. Riprap may be field stone or rough quarry stone. It should be had, angular,
holy weather -resistant and well graded
6. Construct the apron on zero grade with no marfall at the end Mae the top
of the riprop at the downstream end level with the recdvhg area or slightly
below it
8. Ensure that the apron is properly aligned with the receiving stream and
preferably straight throughout its length. If a curve Is needed to fit site
conditions place it In the upper section of the apron.
9. Immediately after construction, stabilize all disturbed areas with vegetation
(Practice 6.10, Temporary Seeding, and 6.11, Permanent Seeding).
Maintenance
Inspect rfprdp outlet structures after heavy rains to see H any erosion around
or below the riprop has taken place or if stones have bean dislodged
Immediately make all needed repairs to prevent further damage
SFSediment Fence felt Fence)
Specification 6.62 - Construction Specifications
MATERIALS
1.Uw a synthetic filter fabric or a pervious sheet of polypropylene, n)lonv
polyester, or polyethylene yam, which is certified by the manufacturer or
supplier as conforming to the requirements shown In Table 6.62b. Synthetic
}star fabric should contain ultraviolet ray Inhibitors and stabilizers to
provide a minimum of 6 months of expected usable construction ills at a
temperature range of 0 to 120 F.
2Ensure that posts for sediment fences are
1.331bIlkhew it steel with a minimum length of 4 ft. Make
sure that steel posts have projections to facilitate fastening the fabric.
ahor reinforcement of standard strength star fabric, use wire fence with a
minmum 14 gauge and a maximum mesh spacing of 6 Inches
Table 6.62b
Specifications For Sediment Fence Fabric
Physical Property Requirements
F6tering Eff clency - 85x (mm)
Tense Strength at Standard Strength- 30 lb/lin in (min)
Extra Strength- 50 Ib/fn in (mm)
Slurry Flow Rate - 0.3 gd/sq ft/min (min)
CCWSTRUCRON
1.Construct the sediment harrier of standard strength or extra strength
synthetic star fabrics.
2Ensure that the height of the sediment fence does not exceed 18 Inches above
the ground surface (Higher fences may knpound volumes of water sufficient to
cause fasure of the structure)
3.Consfruct the (Ater fabric from a continuous roil cut to the length of the
barter to avoid joints when joints are necessary, securely fasten the Ester
cloth only at a support post with overap to the next post.
4.Support standard strength star fabric by wire mesh fastened securely to the
up slope side of the posts using heavy duty wire staples at least 1 nth long,
or tie wires. Extend the wire mesh support to the bottom of the branch.
5.Men a wire mesh support fence is used, space posts a maxanum of 8 ft apart
Support posts should be driven securely into the grand to a minknum of 18
inches
6.Extro strength titer fabric with 6ft post spacing does not require wire mesh
support fence. Staple or wke the /titer fabric directly to posts
].Excavate a trench approximately 4 inches wide and 8 inches deep dong the
proposed line of posts and upslope from the barrier (figure 6.62a).
&Backfsl the trench with compacted soil or gravel placed over the filter
Iabra
9.Do not attach !star fabric to existing trees.
Maintenance
Inspect sediment fences at least once a weer and after each rarmfdl. Mace any
required repairs Immediately.
Should the fabric of a sedknent fence collopft taw, decompose or become
ineffective, replace it promptly. Replace bump every 60 da)s.
Remove sediment deposits as necessary to provide adequate storage volume for the
next ron and to reduce pressure on the fence. Take cam to avoid undermining
the fence during cleancut
Remove all fencing materials and unstable sediment deposits and bring the area
to grade and stabilize it after the contributing drainage area has been propedy
stabilized.
Grass -Lined Channels
Specification 16.30 - Construction specifications
1. Remove an trees, brush, stumps and other objectionable material from the
foundation area and dispose of properly.
2 Excavate the channel and shape it to neat Ines and dimensions shown on the
plans plus a 0.2 ft overcut around the channel perimeter to allow, for bulking
during seedbed preparations and sod buildup.
J. Remove and property dispose of all excess soil so that surface water may
enter the channel freely.
4. fie procedure used to establish grass In the channel wN depend upon the
severity of the conditions and selection of species. Protect the channel
with mulch or a temporary [her sufficient to withstand antkpated
velocities during the establishment period (Appendix 805).
Maintenance
During the establishment period, check grass -flied channels after every
rainfall. After grass is established, periodically check the channel; check it
after every heavy rainfall event Immediately make repairs It is particularly
inpartant to check the channel outlet and all road rrosshgs for hank staNfty
and evidence of piping or scour holes. Remove ail significant sediment
accumulations to mainintain the designed carrykq opacity. Keep the grass In a
health, vigorous condition at ail tines, since It is the primary erosion
protection for the channel (Practice 6.11, Permanent Seeding).
Sediment Basin
specifications tN 6.61 - Construction Specifications
t9te preparations -Clear, grub and ofry hoped from areas under the
ambadment to remove trees, vegetation, roots and other objectionable matetd.
Delay dewing the pod weer until fine dam is complete and then remove brush,
Uses and other objectionable materids to facNRate sediment deamut
stockpile all dapsol or soh containing organk matter ►or use on the outer
shell of the embankment to facilitate vegetative establishment Place temporary
wdknent control measures below the basin as needed.
2Gut-off trench-Excevote a at -off trench dong the centerline of the earth
fill embankment Gut the trench to staple soil material, but in no case make R
less than 2 ft deepp, the at -off beach must extend Into both abutments to at
least fine devotion of the riser Great Make the minimum bottom width wide
enough to permit operation of excavation and compaction equipment but in no case
less than 2 ft. Hoke sib slopes of the bench no steeper than 1:1. Compaction
requirements are the same as those for the enbankment Keep the trandh dry
during baddsing and compaction operations.
3.Embmkment-Take /ill mat" from the approved areas shown on the plans It
should be dean mineral W& free of roots woody vegetation, rods and other
objectionable motefd. Scarify weal on which /ill is be placed before placing
M. The fN material must contain suffident moisture so it can be famed by
hind into a boll without aumb/4 If eater can be squeezed out of the bog, it
Is too wet for proper compaction. Place iN material in 6 to 8--inch
continuous layers over the entire length of the till area and then compact it
Compaction may be obtained by routxng the construction haling equipment over
Me NI so that the entire surface of each layer is traversed by at least one .
wheel or bead track of the heavy equpment or a compactw may be used
Construct the embankment to an devotion 10Z higher than the dwign height to
allow for setting.
4.Conduit spillways-Securdy attach the riser to the bard or bard stub to
mace a watertight structural connection. Secure ail connections between bard
sections by approved watwWt assemb8es Place the bard and riser on a
km, smooth foundation of knpwvktx soil. Do not use pervious motand such
as sand gravel, or crushed stone as borddN around the p4)e or anti -asap
collars. Place the till materld wound the ptoe spillway In 4-bch layers and
compact it under and around the pipe to at least the sane density as the
adjacent embankment Cam must be taken not to raise the pipe from inn contact
with Its foundation start compacting under the pipe haunches.
Place a minimum depth of 2ft of hand -compacted bodcfal over the plos spillway
before wowing R with construction equipment Anchor the rear in place by
concrete or other satiabctory mama to prevent Potation. In no case should the
pine conduit be Installed by cutting a trench through the dam after the
embankment is completa
SEmargency spihray-kwta6 the emergency spillway In undistw6ed sol. the
achievement of planned elevations grade, design wick and enbahce ond exit
channel slopes are critical to the auccessful operation of emergency spilway.
6.Inlets-Discharge water into the bash in a manner to prevent erosion. Use
diversions with outlet protection to divert sediment -laden water to the upper
end of the pod area to Improve bash trap elfxxency (References Runoff
Control Measures and Outlet Protection).
7.Eroson control -Construct the structure so that the disturbed area is
minimized Divert surface water away from bare crew. Complete the aobankment
before the area is dewed. Stabilize the emergency spillway anbanbnent and off
other disturbed areas above the Great of the prbeipd spillway Immediately
after construction (References: Surface Stabilization).
&Safety -Sediment basks may attract dniden and can be dangerous. Avoid steep
side dopes and fence and mark basins with warring sigma If treapessing is
likely. Fdow, ail state and local requkwmmts
MoIntenoce
Check sairmer basins after periods of signfRomt runoff. Remove sediment and
restore the bash to its origkhd dimensions when sediment accumulates to one-
half the design depth.
Check the embankment spBways, and outlet for erosion damag% and inspect the
ambankment for piping and settlement Mace all necessary repairs immediately.
Remove all trash and other debris from the riser and pod area.
Land Gngdh
Specification 16.02 - Construction Spedfcetions
1.Consbuct and maintain all woskn and sedimentation control practices and
measures in accordance with the approved sedinentatkm control plan and
construcUan schedule.
2Remove good topsdi from wawa to be graded and filed and preserve It for
use h rmishhg the grading of all a8kd areas.
3.Smrfy areas to be topsaied to a mhknum depth of 2 inches before placing
topsos (proctke 6.04, Topsolhg).
4.Clear and grub areas to be Mod to remove trees vegetation, roots or other
objectionabb matefd that would affect the planned stabilly of Me IM
&Ensure that ill materd Is free of brush rubbish, rocks logs stumps
bulding debris, and other materials happreprkte for constmctkmg stale
[Nis
6.Place al fir h layers not to exceed 9 Inches In thidawn and compact the
layers as required to reduce erosion, elippq% settlement or oMw related
problem&
7.Do not ncorporate frozen matwld or soft mucky, or highly compressible
materials nto IN dopes
&Do not place tN on a frozen foundation, due to pose0le su6ddence and
silppaga
Usep divisions and other water conveyance measures bee of sediment doing
ail phases of development
10.11amde sups or springs encountered dining construction In accordance with
approved methods (Practice 6.81, Subsurface Drab).
i1.Pemonenly stabilize all graded areas Immediately after find grading Is
completed an each area In the grading plan. Apply temporary stabilization
measures on erg graded weal when work Is to be Interrupted w delayed for 30
waking days or longer.
12Ensure that topspN stockpiles borrow areas and spoil arose are adequdely
protected from eroskin with temporary and find stabkorth n measures indudIng
sediment feting and temporary seeding as necessary
Mahteaace
Periodmdy, aback all graded craw and the mpporting erosion and sedimentation
control proctor esroclaly after heavy rakfak Pmmpty remove dl
sediment Ism diversions and other water-dkpoad practices. If washouts or
brads occur, repack then immediately Prompt maintenance of sndl eroded sees
before they became significant guNfes is an essential part of an effective
erosion and sedimentation control plan.
.,,� Ins ,:� :.,, •u
I. Clear rowed and parking areas of all vegetation, roots and other
objectionable material.
2 Ensure that road construction follows the noturd contours of the terrain if
ft is possible
.1 Locate parking weal on naturally flat areas If they are amMe. Keep
grades suffident for drainage but generally not more than 2 to 3,S
4. Provide serfow d%drI and chart excess ruraff to stable areas by using
water bar or turnouts (References: Runoff Control Measures).
5 Keep cuts and ills at 21 or flatter for safety and stability and to
facNKate establishment of vegetation and maintenance.
6. Spread a 6-Inch course of ABC' crushed stone evenly over the fiiff width of
Me road and smooth to avoid depressions.
7. where xepoge areas or seasonally, wet weal must be crossed Install
exibsuAace trains or geotaxtis fabric cloth before placing the crushed stone
(Practice 6.81, Subsurface Draer).
& Vegetate all roadside ditches cuts Me and other disturbed awes or
otherwise gWprktely stabilize as soon as grading is complete (References
Surface stabilization).
9. Provide gapmpriate sediment control measurers to prevent of -site
sedimentation.
Maintenance
Inspect construction roads and poking arras periic"y for caMition of
surface. Topdwas with new gravel as needed Check road ditches and other
seeded aces for eradm and sadmentobw after runoff -producing rains
Mabtakn ail vegetation in a healthy, vigorous ani illm Sedknenr producing
areas should be traded immediately.
Permanent Seeding
The kinds of seed and Whaer, and the rotes of aWkDation of seed fertilizer, and lJoisdane,
shag be as stated below. During periods of overtopping dates the kind of seed to be used
shad be determined by the Engineer.
AN rates am In pounds per are (kilograms per hectarce).
March 1 - August 31
September 1 - February 28
5V55kg) Tail Fescue
50,029) Tag Fescue
5061g) Cantpede
506kg) Cantpeds
2-W28kg) Bermudagrow (huffed)
-5K28kg) Bxmudograae (unhulted)
5OW560kg) FaW¢ar
5OW560kg) Fertilizer
40OW4500kg) Limestone
4000A'45tNNcg) Limestone
Slopes 21 and Steeper and Waste Borrow Locations
Mach 1 - August 31
September 1 - February 28
75085kg) Taft Fescue
74029) Tail Fescue
25j(28kg) Bennudograse (huffed)
JW281kg) Bermuda9'ow (adhuled)
51KIj(560kg) Fatter
5000560kg) Frtilizer
400004500kg) Limestone
40044500kg) Limestone
Approved Toll Fescue
Adventure Adventure N
Amigo
Anthem
Apache Apadne 0
Mid
Austin
Brookotone Bonanza
Bonmzo N
Chapel HE
chasooecole Chieftain
Coronado
Croesfke N
Debutante Duster
Fdcen
Falcon I
Fbelown Petite Fbdawn
Fialown I
Genesis
"de Guardian
Houndog
Jaguar
Jaguar N Kentucky 31
Kitty Hawk
Monarch
Montauk Mustang
OI)rmpk
Pacer
Phoenix Pbde
Pyronid
Rebel
Rebel k. Rebel N
Ranegkds
Safari
Sham" Tempo
MCI*
Tomoark
Trailblazer Tribute
Vegas
wblfpadc
Mangler
Fatibeer shah be 10-20-10 mdywb. Upon Written approval of the Engher, a dilfeent
analysis of fertlbw may be used to provided the 1-2-2 ratio is maintained and the rate
of application adjiisted to provide the sane amount of plant lead as 10-20-10 and*
Temporary Seeding
FertNkw shag be the some anal* as specified for 'Seeding and Mulching' and applied
at Me rate of 400 Iba (450 kg) and seeded at a rate of 50 ponds (55 kg) per hedwe
Sweet Sudan (hears German Mitt or Browntop Millet dad be used in summer marts
and Rye (kerb durhhg Me remainder of Me year: The Engineer Grp detamhe Me exact dates
for using sash kind of seed
Fertilizer Topdressina
Fertilizer used for topdrossing on ail roodwny areas except dopes 21 and steeper stag be
10-20-10 written approval of the Engineer, a different andyda of ortkw may be used
provided grade and dal be applied at Me rate of 500 be per acre (68o kg per Ware).
Fartkar used far topdrayshg an slopes 21 and staepw and waste and borrow area anal
be 16-8-8 gads and shag be applied at Me rate of 5DO its per acre (560 kg per hectare).
Upon written apprmvd of Me Engineer, a different waywis of fertilizer may be used provided
Me 2-1-1 ratio is maintained and the rate of application adiated to provide the one
amount of plant food as 16-8-8 andyels
SMpplemental Seeding
The kinds of seed and proportions daft be the same as specified for Seeding ond Nulrhing ,
with the exacption Mat no centipede aced wN be used in the sad mar for spplemantd
sewing The rate of aWmatim for supplemental seeding may wry from 251 to W par acre
(28 kg to 85 kg per hectare). The stud rate per acre (hectare) will be detamkied by tiro
Engineer prior to Me time of topokessing and the Contractor veil be notified in wri8hhg of the
rate par acre (hectare), told quantity needed and woes on which to apply the svpplemantd
seed Mhknum tNdp equipment consisting of a goad seeder slog be used for hcaporothg
seed into Me sol as to prevent ddatabonce of existing vegetation. A doabuster (boll and dinar)
may be used where doges of dope prevents the use of a sod weeder.
The mnimnn mowing hoot an this project dab be 4 inches (100 mm).
Crimping Straw Mulch
phphg wN be required on this project adjacent to any section of roadway when "ft
he to be maintained or alowed during construction. In areas within 6 ft (2 mete) of Me edge
of pavement straw is to be aknped and than Immediately tacked *0 asphalt to*
Crimping of straw, In lieu of asphalt tack all be allowed on this project subject to be following
conditions
AN am seeded and mulched dad be a irlied and/w tacked with asphalt as drecled by the
Engineer.
Crimping wN be frmfted to dopes 4:1 or fatter miles the Contractor can denonsbafe to the
Engineer that steeper dopes can be negotiated without dterng the typical section.
Straw mulch to be of suffident length and quality to withstand the cramping operate and provide
adequate ground cover.
Crimping equipment khduhg power source shoff be subject to the approval of the Ep]bw
providing that madnum spacing of crmper bodes shad not exceed 8 inches (200 non).
OGroyd
Construction EntranspedBceton t &06 - Construction SpeciNaatar s
1. pear the entrance and exit area of all vegetation, roots and other
ob)ectondik moterid and properly grade It
2 Place the gravel to the specific grade and dimensions shown on the plans and
smooth it
1 Provide drainage to carry water to a sediment trap or other suitable cutlet
4. Use geotaffe fabrics becam they approve stability of the kmdatfon in
locations subject to seepage or high water table.
Maintenance
Maintain the gravel pad In a motion to prevent mud or sediment from leaving
the construction site. 7hfs may require periodic topol ewhy with 2-khch stone.
After each rohfaff, Inspect any structure used to bar sediment and dam R
out as necessary. Immediately remove all objectionable moterlds spilled,
washed or tracked onto pudi/k roadways.
OSKSkimmer Sediment Basin
Specification &64.7 - Construction Specifications
MAMd&S
1. Clear, grub, and strip the area under the embankment of all vegetation and
root mat Remove dl surface sal containing high amounts of argank matter
and stociple w depaw of R pmpety. Had al obpi actionable Material to the
dedpated� awe. Place temporary sediment control measures below
basin as n
2 Ensure that lab material for the embankment to free of roots waody
tation, argonk matter, and other objectionmatwid. Place the Bl in
lable not to exceed 9 inches and machine compact it Over 1Nl the embankment
6 inches to slow far settlement
.1 Shape the bash to the specified dimensions Prevent the shamming device
from setNhy Into the mud by excavating a shadow pit under the skimmer or
providing a low support under the skimmer of stone or tinbw.
4. Place the bard (t)pkdly 4-loch Schedule 40 PW pipe) on a tam, smooth
foundation of knpwvious soil. Do not use parlors material such as sand,
grovel, or crushed stare as baddlif arciund the P0a. Pace the fl material
around the pipe spillway In 4-inch to and compact R under and around
the ppppee to at boat the some derhait the adjacent embahbnent Care must
be fZen not to raise the pipe from this firm contact with its foundation when
coapacthg under the pipe haunches
Place a minimum depth of 2 feet of compacted badcNR over tiro ppe spillway
before crossing it construction equipment In no case should the pipe
conduit be Installed by cutting a trench through the dam after the enbankmarht
is complete.
5 Assembb the skinner fallowing the manufacturers Instructions or as designed
6. Lay the assembled skimmer on the bottom of the basin with the flexible
)oat at the Met of the bard pipe. Attach the flexible joint to the barrel pre
and position the skirwner over the excavated pit or support Be sure to attach
a rope to the skimmer and anchor it to Me aide of the basin. This as be used
to pug the skknmi r to the side for malotemnce.
7. Earthen spNwaye-bstoll ft spillway in undisturbed mil to the greatest
extent possible. The achievement of plaruned devotions rode, �1gn width,
and entrtranance and edt chand slopes we aiticd to the succes,Nf operation
of the spillway Me way elhculd be lined with /anhated postk or
mpermeable t /obirc. The fabric must be wide and long enough to
cover the bottom and sides and extend onto fine top of the dam for anchoring
in a trench. As edges may be secured with 8-Inch staples or pins The fabric
must be long to extend down the dope and exit onto stable ground.
Rro width of the fabric must be one place, not joined or spiked otherwise
water can get under the fabric If the length of the kbrk is hauff dent for fine
anti a bngfh of the spillway, and"secdom spanning the complete w�M,
may be used The upper section(s) overlap the bare sections) so
that water cannot tow undw the k1I Secure the upper edge and sibs
of Me fabric In a trench with staples or phs (Adopted from A Manual for
Designing Welding and Mabtamng S7knmer Sediment Basins' February,
199R d IK Fdrdoth & San.).
a Inbte-Dbdwrye water into the basin in a manner to prevent erosion. Use
temporary slope trans or dv rsionns edth outlet protection to dfvrt sedknent-
laden water to Me upper end of the pod area to Improve bash trap effideney
A Erosion control -Construct the structure so that Me disturbed area is
mhknfzed Divot surface ester away from bare areas Complete the
embankment before Me area is cleared Stabiles the emergency spWway
embankment and a other dbdrbed areas above Me crest of Me pm
spillway krimedately after consfmctim (References: Surface Stabiizatfcnn)
la After al Me sediment -producing am haw then pemonentiy, stabilized,
remove Me structure and ail the unstable sedinant. Smooth the am to
blend with the adjoining areas and stabilize properly, (References Surface
stobrizatkn).
Inspect skimmer sedbhent basins at least weakly and after each soffkant
(one -halt rndh or greater) rab/al event and repack Immediately Remove
sediment and restore the bosh to its mod dimensions when sediment
accmulates to one-half Me height of Me fret baffle. Pull the skimmer to
one side so Md the sedamt underneath It can be excavated Excavate the
sediment from the entire bash, not mist around the skimmer or the first car.
Make we vegetation growing In Me bottom of Me basin does not had down
the skinwner.
If the skimmer is dogged with trash and there is water In Me basin, usuay
jerking on the rope will make the skfimer bob up and dam and dislodge
the debris and restore Now. If this does not work, puff Me skimmer over to
the side of the basal and remove Me debris Also check Me orifice inside the
skimmer to we if R Is dogged If so remove the debris
If the skWwner am or bard ppe Is dogged the orifice can be removed and
the obstruction cleared with a plumbers snake or by flushing with water. Be
sum and replace Me wilke before repositioning the Ammer.
Check the fabric lined No far dam and maker my neared repairs
with fork the spina Me fu8 widM of �Mway. Clrodc the embankment
spNlwayw, and ou at Wr aoslon da age and hapect the embankment for
pig and settlement Mace all necessary repas Immediately. Remove all
bgdr and other debris tram Me athi mar and pod areas
Freezing weather can result In ke forming In the bash. Some special
precautions should be taken in the shier to prevent Me skimmer *am
plugging We ire.
OPHARDWARE aolH & GRAW! KET PROTECNIN
tion 6.51 - Construction tons
SpenFicn ! pecHka
1. Unffamly grade a shallow depression approaching the Mat
2 Drive 5 FT steel post 2 FT into the ground surroadkhg the Inlet.
space post evenly around the perimeter of the Met a mmelrwm of 4 FT apart
I Surrond the posts wit wire mash hardware doth. Secure the wire most to steel
posts at the top, middle. and bottom. Pkchg a 2 FT flap of the wire mesh.
under the gravel for anchoring Is recommended
4. Place dear gravel (NC DOT 0 or 157 stone) an a 21 slope with a height of 16
inches arowd the wir% and smooth to an even grade.
5 Once the contributing drainage area has been stabilized, remove accumulated
sediment and establish find grading devotions
& Compact the area proprly and stabilized it with ground cow.
Maintenance
Inspect Inlets at least weekly and after each significant (0.5 in of greater)
rainfall event Clew the meet were of any debris or other objects to provide
adequate flow for subsequent rains Take caw not to damage or undercut the
wke mesh during sediment removal. Replace stone as needed
ENGINEERING
LAND PLANNING
COMMERCIAL / RESIDENTIAL
COASTAL
SITE
DESIGN,PC
P.O. Box 4041
Wilmington, NC 28406
[phone]
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