SWA000109_Stormwater Report_20210707 (2)

PERMANENT DETENTION BASIN NOTES:
1. ALL FILL SOILS FOR BERM SECTION SHALL BE CLEAN, IMPERMEABLE MATERIAL AND COMPACTED TO AT LEAST
98% STANDARD PROCTOR MAXIMUM DRY DENSITY, AT OPTIMUM MOISTURE CONTENT. NO BLASTED MATERIALS
SHALL BE USED IN THE EMBANKMENT CONSTRUCTION. SOILS SHALL NOT EXHIBIT SIGNIFICANT SHRINK/SWELL OR
DISPERSIVE CHARACTERISTICS. ON -SITE GEOTECHNICAL ENGINEER SHALL APPROVE THE SOILS FOR PLACEMENT
WITHIN THE BERM SECTION. THE GEOTECHNICAL ENGINEER SHALL ALSO SPECIFY THE METHODS TO BE USED FOR
PLACEMENT OF FILL. IF ADDITIONAL USES PLANNED UPON THE BERM SECTION (BUILDINGS, ETC.), THE
GEOTECHNICAL ENGINEER SHALL SPECIFY SOILS SUITABLE FOR THAT ADDITIONAL USE. OF FILL.
2. IN ALL FILL AREAS OF THE BERM, A SOILS COMPACTION TEST SHALL BE CONDUCTED EACH 2500 SQUARE FEET
PER VERTICAL FOOT
3. A KEY TRENCH IS TO BE PROVIDED IN ALL FILL AREAS. TRENCH TO EXTEND A MINIMUM OF FIVE FEET BELOW
EXISTING GRADE. SOILS AND COMPACTION FOR KEY TRENCH SHALL MEET ALL REQUIREMENTS OF #1 ABOVE.
4. NO TREES OF ANY TYPE MAY BE LOCATED ON THE BERM SECTION.
5. FILL PLACEMENT SHALL NOT EXCEED A MAXIMUM 8" LIFT. EACH LIFT SHALL BE CONTINUOUS FOR THE ENTIRE
LENGTH OF EMBANKMENT. BEFORE PLACEMENT OF FILL FOR THE BERM SECTION, ALL UNSUITABLE MATERIAL
SHALL BE REMOVED AND THE SURFACE PROPERLY PREPARED FOR FILL PLACEMENT.
6. ANY FILL REQUIRING HAND COMPACTION, INCLUDING FILL AROUND PIPES, SHALL BE CONDUCTED IN 4" LIFTS.
7. CONTRACTOR IS RESPONSIBLE TO CLEAN OUT SEDIMENT BASIN PRIOR TO CONVERTING TO PERMANENT
STORMWATER BMP.
1
TOP OF SPILL WAY
j, SPILLWAY: WIDTH VARIES
SEE PLAN CHART
INCLUDE SUBLAYER OF FILTER FABRIC OR FS-2
FILTER STONE WITH A BEDDING THICKNESS OF 6-.
POND EMERGENCY SPILLWAY
NOT TO SCALE
CLASS B RIP RAP,
PLACED 24" DEEP
BERM IS REQUIRED AT THE BACK OF
RISER/BARREL TO MAINTAIN
ADEQUATE COVER OVER OUTLET PIPE
AND ACHIEVE POSITIVE SLOPE IN PIPE
8' (SEE GRADING PLAN FOR DETAILS)
4" TOPSOIL MIN. ON
BERM MIN. SHELF
SPILLWAY 6' VEGETATIVE SHELF
.,. (PER NCDENR MDC)
BERM FOR W 6:1 MAX. SLOPE
� POND P
SECTION
NON -WOVEN GEOTEXTILE
FABRIC SHALL BE PLACED
AROUND EACH JOINT OF
HDPE IN 2' WIDE STRIPS
CENTERED ON JOINT.
ANTI -SEEP COLLAR (X2) SEEP
COLLARS TO BE SPACED AT 19'-4"
ON CENTER. COLLARS SHALL BE
PLACED A MINIMUM OF 2 FEET
FROM PIPE JOINTS. (SEE DETAIL)
(MIN.)
SCM#
TOP
WIDTH
1
285.20
15'
2
279.50
15'
3
269.00
15'
4
262.00
10,
5
270.20
25'
6
269.25
20'
W=8'
A -1
1- 12" MiN.
SHEE OVERLAP
m
IL- NYLON OR "
STAINLESS
STEEL BOLTS
A-J
UPSTREAM ELEVATION
F1
_1 CONNECTING BAND
Y" THICK HIGH DENSITY
POLYETHYLENE COLLAR
%2" WIDE STAINLESS
STEEL CLAMP (EACH SIDE)
CONTINUOUS PLASTIC WELD
(EACH SIDE)
SECTION A -A
NOTES:
1. THE PIPE, CONNECTING BAND, AND SEAM COATING CAN BE EITHER SILICON CAULKING
(RECOMMENDED),TAR OR MASTIC.
2. APPLY SILICON CAULK, TAR, OR MASTIC TO THE CONNECTING BAND AND LAY THE PIPE
ON IT. APPLY SILICON CAULK, TAR, OR MASTIC TO THE OTHER HALF OF THE CONNECTING
BAND AND SET IT IN PLACE, LINING UP THE BOLT HOLES.
3. INSTALL THE STAINLESS STEEL CLAMPS ON THE SPLIT HALVES OF THE CONNECTING
BANDS AND TIGHTEN THE BOLTS AND CLAMPS.
4. APPLY SILICON CAULK, TAR, OR MASTIC ON THE SEAMS AS NEEDED TO INSURE A GOOD
SEAL SO THAT THE COMPLETED INSTALLATION IS WATERTIGHT.
WET POND ANTI -SEEP COLLAR DETAIL
NOTE: CONTRACTOR IS RESPONSIBLE FOR PLANTING 6FT WIDE VEGETATIVE SHELF WITH
50 PLANTS PER 20OSF, 2FT ON CENTER. NON -CLUMPING TURF GRASS SHALL BE PROVIDED
ON DAM STRUCTURE & FILL MATERIAL. TREES & WOODY SHRUBS SHALL NOT BE ALLOWED.
THE SHALLOW WATER, OR FIRST 3FT, SHALL BE PLANTED USING BLUE FLAG IRIS (IRIS
VIRGINICA) AND THE REMAINING VEGETATIVE SHELF SHALL BE PLANTED USING CARDINAL
FLOWER (LOBELIA CARDINALS) AND SWEET PEPPER BUSH (CLETHEA ALNIFOLIA).
CONTRACTOR MAY SUBSTITUTE PLANT TYPE WITH NCDENR APPROVED EQUAL.
SUBMERGED ORIFICE OUTLET
(SEE DETAIL)
NOTE: CONTRACTOR IS RESPONSIBLE TO CLEAN OUT SEDIMENT
- YR STORM EVENT BASIN PRIOR TO CONVERTING TO PERMANENT STORMWATER BMP.
■_FOREBAY SIDE
SLOPES 3:1
POND WILL NEED TO BE PUMPED OUT IF
MAINTENANCE IS REQUIRED
L NOTES: VEGETATIVE SHELF IS REQUIRED
TO BE 6" BELOW PERMANENT POOL
ELEVATION FOR THE FIRST T AND 6"
HIGHER THAN THE PERMANENT POOL
ELEVATION AT THE FULL 6' WIDTH.
WATERTIGHT SEAL TO BE PROVIDED
AT RISER/BARREL INTERFACE
KEY TRENCH (SEE BERM SOIL AND
COMPACTION SPECIFICATIONS)
WET DETENTION POND DETAIL
NOT TO SCALE
CLAY OR SYNTHETIC LINER (TYP)
6'VEGETATIVE SHELF
NCDENR ■
SLOPE
TOTAL ■- TO BE
', OF -i ■ AREA
STORMWATER CONTROL
MEASURE DISSIPATOR PADS
PIPE DIAMETER {IN}
PIPE SLOPE {°/fl}
DISSIPATOR
LENGTH {FT}
DISSIPATOR TOP
WIDTH {FT}
DISSIPATOR
BOTTOM WIDTH
DISSIPATOR DEPTH
(I N)
STONE
FES-200
42
0.5
14
7
14
12
CLASS B
FES-201
36
0.5
12
6
12
12
CLASS B
FES-202
30
0.5
10
5
10
12
CLASS B
FES- 203
30
8.5
10
5
10
15
CLASS 1
FES-204
30
7.86
10
6
12
15
CLASS 1
FES- 205
36
1.41
12
6
12
15
CLASS 1
FES-206
36
0.67
12
6
12
12
CLASS B
FES- 207
30
5.01
10
5
10
15
CLASS 1
FES-208
30
0.63
10
5
10
12
CLASS B
FES-209
30
2.59
10
5
10
15
CLASS 1
FES-210
30
0.57
10
5
10
12
CLASS B
FES-211
30
4.27
10
5
10
15
CLASS 1
FES-212
30
4.83
10
5
10
15
CLASS 1
NOTE: DISSIPATOR PAD LENGTH AND WIDTH ARE MINIMUM SIZE REQUIRED.
CONTROL
STRUCTURE
4" PVC STUBBED
INTO BOX
ANENT POND ELEVATION
NOTES:
1. THE RISER SHOULD BE PLACED IN OR AT
THE FACE OF THE EMBANKMENT.
WET POND SUBMERGED ORIFICE OUTLET DETAIL
0
IZT�
12" CIRCULAR
ORIFICE 'D' &'E'
4o,
1'
NOT TO SCALE
36"x6"
ORIFICE'F' &'G'
OUTFALL PIPE
SUBMERGED-` NCDOT APPROVED
ORIFICE OUTLET so, �� PRECAST BOX
ORIFICE 'C' & Cl
WET POND STORMWATER CONTROL BOX
NOT TO SCALE
A
B
C
C1
D
E
F
G
SCM#
TOP
NWSE
4" WQ ORIFICE
WO ORIFICE
SIZE
12" ORIFICE
# OF 12" ORIFICE
36"x6" ORIFICE
# OF 36"x6"
1
285.00
281.00
281.00
4"
284.00
3
0
0
2
279.00
277.00
277.00
4"
278.00
3
0
0
3
268.50
265.00
265.00
4"
267.25
3
0
0
4
262.00
258.50
258.50
4"
259.50
2
0
0
5
269.75
266.00
266.00
2"
266.75
2
0
0
6
268.75
266.00
266.00
4"
0
267.15
2
OUTLET
W�DITCH
OUTLET
W�0 DITCH
D
CLASS 'B' RIP RAP
CLASS I RIP RAP
CLASS 'B' RIF RAP
CLASS I RIP RAP
TDNS
TE%T �E
S,Y.
TONS
T� T-E
TONS
T e
S.Y.
TONS
T e
12"
2
5
5
2
5
1
4
2
1
4
15"
2
7
7
3
7
1
5
3
2
6
18"
3
1O
9
4
1O
2
7
4
2
8
24"
5
14
15
7
15
3
11
7
4
12
3Q"
8
21
21
11
22
5
16
11
7
17
3E"
11
28
29
15
30
7
22
16
iQ
23
42"
15
37
39
20
39
1D
28
22
13
30
72"
-
-
1O2
57
1O4
-
-
64
38
78
1
i 1
NOTE:1
FOR CALCULATION PURPOSES
00 •:
*'_1
1 il�J ■�,�l�j ■�,�l�j � `�
FLATTER
J I
PLAN L
1 SLOPE 1 ' I�fI rtJi
..- �. •r-4�i1 4rii�r. r•. !a 1 •
T PLAN
'i 1 1`� !fir •
a. , a► , a► . a�11� -
GEOTEXTILE
SECTION A -A
PIPE OUTLET WITH DITCH
H= RIP RAP TO
���
1• .GEOTEXTILE
T= 15" CLASS I RIP RAP, UNLESS OTHERWISE SHOWN ON PLANS
I I SECTION
PIPE OUTLET WITHOUTDITCH1
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89 OF 105

305
300
295
290
285
280
275
270
265
260
FES#207
STA: 10+17.21
INV: 269.13 (E)
DISSIPATOR PAD
- l I
81 LF 30" RCP @ 5.01 %
SPILL WA)
285.2(
Ln
1 .!
l \I 1 • f
' � I
1 �
6:1 VEGETATED SHELF
N
98.18
I INV OUT: 2- ---- (W) r N \1
N N N OD CC) Ln
TOP = 286 `
WSE = 281
BOT = 275 = ■ 1
33:1 3:1
:1 .
FES#200
TOP: 280.5
INV IN: 276.55 (S
r
I I
I
I
II
II I I
WET DETENTION POND #'I - PLAN
HORIZONTAL: 1" = 30'
5' WIDE VEGETATED SHELF
(PER NCDENR MDC)
BERM ELEV: 286.00 fi:1 MAX. SLOPE
EXISTING GRADE
ANTI -SEEP COLLAR (X2) SEEP 4" MIN. TOPSOIL ON SHELF --
COLLARS TO BE SPACED AT TOP OF RISER ELEV: 285.00
19'-4" ON CENTER. COLLARS OCS#300 �+;•�1 I'
SHALL BE PLACED A MINIMUM STA: 10+98.18
OF 2 FEET FROM PIPE JOINTS. �. TOP: 285.00 ti I
i FOREBAY BERM y- I I kI i k-III,
(SEE DETAIL) I-u� = INV OUT:.1W}� f 4 TOP ELVE: 279.50
FES#207 =III -I k=III-1 MAIN PERMANENT POOL FINISH GRADE
STA: 10+17.21 I I �' I _ - `i FOREBAY '� _� '-11 I_
TOP: 272.01 I I ICI I-I��-=��=- is I I k=I = 1 4" TOPSOIL MIN. ON SHELF
INV: 269.13 (E) ='
I= SEDIMENT STORAGE: 27fi 00
I k I I k 1T_I =ITI T -BOTTOM o� POND: 27�-oa=l I I I =ITk=1Tk=l 1 11 1{ 6' WIDE VEGETATED SHELF
-I I k III, Ilk I { 1-1 + +_I, (PER NCDENR MDC)
I ANTI -FLOATATION DEVICE SEDIMENT CLEANOUT: 276.00 6:1 MAX. SLOPE
10' X 5' 5' x 5' x 48" THICK BOTTOM OF POND: 275.00
DISSIPATOR
CLASS 1 STONE 81 LF 30" RCP @ 5.01%
THICKNESS =15"
:r_ O � N Q M C7 C7 �
Cn u7 r n Cn Co Lo u7 v 00
cl7 CD 4 Co ai cD (6 Co r�
r` r� r` Con °o r1_ ao rn c0 00
rV N rtiN NC11 NN C\JCV
9+75 10+00
SPILL WAY (15' WIDE)
ELEV: 285.20
10+50 1 . -r,� 11+50
12+00 12+50 13+00
WET DETENTION POND #1 - PROFILE
VERTICAL: 1" = 10'
305
300
300
295
295
290
290
285
285
280
280
275
275
270
270
265
265
260
260
255
I I } 1 I 1 1 1 1 11 1 \\
Il I ` �' ' , _ , ►�` �1111111111 111
� I jff r 7 _ I 11 11
� I I f 1 1 _ 1 •�� 1 1 1 � 1 1
6:1 VEGETATED SHELF
fllf 1 6, I l !FI !
CM ,
I
I
f
TOP = 280
j f + WSE = 277
f f 30 1 BOT = 271
III ry i I SPILL WAY l I
279.50
ZAP
1 �y OCS#301 FES#208
RC+p I 1 ► I ti STA: 12+64.11 _ +
17.91
@Q 1 TOP: 279.00 NV: 268.10 (SW)
FES#201 INV OUT: 268.44 (NE) IL
TOP:274.99 II
I INV IN: 272.11 (SW) 54 LF 30" RCP @ 0.63% I I t
} 1 I I I l I I DISSIPATOR PAD
1 FE5#202 I 11 1 1� 1 1 III 1 1 1
I TOP: 274.87 FO BAY 5 lI 1 11 11 II 1111 I 1 I
' INV IN. 272.00 (S) 271 00 N
+ I DISSIPATOR PAD -" ■
i ■„
r / 2aa r1%r I 1 I I I II II Ill 1 I II I III 11
,r,,�'
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R`�
WET DETENTION POND #2 - PLAN
HORIZONTAL: 1" = 30'
4" MIN. TOPSOIL ON SHELF
6' WIDE VEGETATED SHELF
EXISTING GRADE (PER NCDENR MDC)
FINISH GRADE 6:1 MAX. SLOPE SPILL WAY (15' WIDE)
ELEV: 279.50
OCS#301
- _ STA: 12+64.11 ANTI -SEEP COLLAR (X2) SEEP
--------- BERM ELEV: 280.00----------------- TOP OF RISER ELEV 279 00 TOP- 279.00 COLLARS TO BE SPACED AT
-III- INV OUT-268-44 (NE) 19'-4" ON CENTER. COLLARS
I I FOREBAY BERM SHALL BE PLACED A MINIMUM
=I I=I I TOP ELVE: 275.50 OF 2 FEET FROM PIPE JOINTS.
III III -III - 4' - (SEE DETAIL)
---�1-- F-7- 4dI =-I k 1 1 ==dI�`1 I I FES#208
1:11
91FOREBAY� MAIN PERMANENT POOL TOP: 270.98
-I
INV: 268.10 (SW)
III. II I I-IIa- I= I V= I=I I .1 EpIMENT STO k I 10' X 5' DISSIPATOR
4"TOPSOIL MIN. ONSHELF � I CLASS BSTONE
THICKNESS =12"
6 WIDE VEGETATED SHELF
I
(PER NCDENR MDC) BOTTOM OF POND: 271.00
6:1 MAX. SLOPE -------- BOTTOM OF POND: 271.00
ANTI -FLOATATION DEVICE I I= 1=I 1'- 1=I 1 -1 1 I=I 11711 I I I
5' x 5' x 42" THICK -� I --{ I II ICI I 1III--III IIIIII'_'-
54 LF 30" RCP @ 0.63°I0---------------'-III -:LIt=_�I�
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OD 00 m n DD r� °D ti m n co n r- ti Lo
N N N N N N N N N N N N N N N
9+75 10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+50 14+00
WET DETENTION POND #2 - PROFILE
VERTICAL: 1" = 10'
300
295
290
285
280
275
270
265
260
255
14+25
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GRAPHIC SCALE DRAWING
SHEET
30 0 15 30 60 120
D-2.2
( IN FEET )
1 inch = 30 Ft.
90 OF 105

I
I 1 I I I I 1 1 I
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t \ > . o
I �- `� `- •` _1101 R•1 VF[,FTATFn RHFI F
285
280
275
270
265
260
255
250
245
240
WET DETENTION POND #3 - PLAN
HORIZONTAL: 1 " = 30'
f
I
I I �
1 1
N
YI I
1�1
I DISSIPATOR PAD
I
I '
Ir I 1
FES#209
,Y STA:13+2&14
TOP: 257,07
INV IN: 254.19 (SW)
f I t � I •
I � f It •
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l I I 1
I II I I I I I 1 11
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1 11 1 1 1 1\
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87 1.F 4 @ RGp ��
- > - TOP: 276.25 -
~ INV IN: 265.00 (SW)
INV IN: 263.49 (N)_ _
INV OUT: 263A9 (S) 280=
- - - CB#138 - \ _ - -
- -- STA:18+06.88 IN 1-1
-_ All
51° - TOP:276,80 - ,-
INV IN: 270,27 (NE)
INV OUT: 269.27 (SE)
23- n 8�R @ 0.50%
I fCB#1 39
STA: 18+29.65 -_ , ,�'
TOP: 276.74
- - - INV IN: 269.15 (NW) `` > - ,yf''� 6p IFES#204
INV OUT: 269.15 (S) - - - - , . `L �+ TOP: 255.88 275 ,
- 1 6:1 VEGETATED SHELF INV IN: 253A0 (N)or
f
DISSIPATOR PAD I
FOREBAY
25200
_ 0. - _: 1_-------
TOP = 263 - `�' - 265f-
1 WSE = 258.5 . r
BOT = 252 - -
r _
255
--- r - STA: 12+10.64
m TOP: 261.75
INV OUT: 255.51 (E) Q~ ~ _ - - - - 2f
- C
_ - 260 - _ _ DISSIPATOR PAD '77
-
--
SPILL WAY ~ FES#210: -
-
- 262.00 STA: 12+84.24 --
_ J-r
' -_ ------:-__ TOP: 257.97- _
-INV IN: 255.10 (11V)
1 _ �.
GRAPHIC SCALE
0 15 30 60
OCS#302
STA: 12+59,24 TOP OF POND: 270.00
TOP-• 268.50 SPILL WAY (15' WIDE)
BERM ELEV: 270.00 TOP OF RISER ELEV: 268.50 INV OUT: 255.98 (NE) ELEV: 269.00
FINISH GRADE EXISTING GRADE ANTI -SEEP COLLAR (X2) SEEP
t - - - COLLARS TO BE SPACED AT
�. 19'4" ON CENTER. COLLARS
r-==---------- - - - - ------- - ! - SHALL BE PLACED A MINIMUM
i 1-1 i FOREBAY BERM OF 2 FEET FROM PIPE JOINTS.
1 d 711 1 1 � 4' TOP ELVE: 262.50 1 k I I (I I
1{ 1- 1 1 I F 1 I I I I (SEE DETAIL)
I -�1 1? `fir 11 III FOREBAY �� v? MAIN PERMANENT POOL I= 1 FES#209 STA:13+28.14 I I
111I1- - - - - - - - - - - -- -- 11II-I�I11-{1 TOP:257.07
SEDIMENT STO _ I 259.00� 1 ' INV: 254.19 (SW)
+Ik 1II III- '' k= �E: 10'X5'
4" TOPSOIL MIN. ON SHELF BOTTOM100 PION- • _58.00-'� 1-1 1 -1 f III -III 111 = = DISSIPATOR
- -I I- CLASS 1 STONE. -III-Ml
' SEDIMENT CLEANOUT: 259.00 111 1 X3THICKNESS =15"
6' WIDE VEGETATED SHELF BOTTOM OF POND: 258,00 ------
(PER NCDENR MDC) 4" MIN. TOPSOIL ON SHELF 69 LF 30" RCP @ 2.6% . ___TT
6:1 MAX. SLOPE 6' WIDE VEGETATED SHELF IIII1I
(PER NCDENR MDC) ANTI -FLOATATION DEVICE
6-1 MAX- SLOPE 5' x 5' x 54" THICK
co 07 m CD w 0)0) r -
oD LCy 0) Q lC] 0)
co tiO O]r pti r
N N N N N N N N r
10+50 11+00 11+50 12+00 12+50 13+00 13+50
WET DETENTION POND #3 - PROFILE
VERTICAL: 1" = 10'
( IN FEET )
1 inch = 30 ft.
285
280
280
275
275
270
270
265
265
260
260
255
255
250
250
245
245
240
240
235
120
WET DETENTION POND #4 - PLAN
HORIZONTAL: 1" = 30'
--� 6' WIDE VEGETATED SHELF
FINISH GRADE - (PER NCDENR MDC)
--. 6:1 MAX. SLOPE
OCS#303
-BERM ELEV: 263.00 - -- STA: 12+10.64
� TOP: 261.75
-IIVV OUT: 255.51 (E)
TOP OF RISER ELEV: 261.75 _
-IIII{ FOREBABERIR
-1�1-
-III-III- I - - - - - - J - - - - - - - - - - - f�ELVE:-2�--
4" MIN. TOPSOIL ON SHELF
TOP OF POND: 263.00
SPILL WAY (10' WIDE) FES#210
ELEV: 262.00
STA: 12+84,24
TOP: 257,97
_ _ INV: 255.10 (W)
�j I Ir
4 IIII I {i 10' X 5' DISSIPATOR
CLASS B STONE
-III- `I- - �• FOREBAYMAIN PERMANENT POOL THICKNESS =12"
------- -i I LI
11=I 11=I11 - I
11 I I 1=1 I I 1 a- __ -1 I I- I I ►.4 I I I 11=
-:: 1 - I-
I 1 I I -I 11 I ICI k
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-1 I I -I I II II 11 1111 � ��-fir I � 1 l- I-1 I -III I I 1=f ti- I if 11-
4" TOPSOIL MIN. ON SHELF -III 11 III 11 I S DI EN ST RA III; 1 I 1 11-1 11-1 11=1 I I_-1 - -1 EXISTING GRADE
- I 1 J 111- 11- 11- NT1-SE LLAR (X2)) 1 �_
6' WIDE VEGETATED SHELF BOTTOM OF POND: 252.00
I I - OLLARS T$BE SPACE
(PER NCDENR MDC) - I,11 11111f 111 ,_4 ION CENTER. COLLAR III-1I I -I IT 1 � � -r =,T,
6-1 MAX. SLOPE ANTI -FLOATATION DEVICE SHAL E PLACED A MINI 111-11-11-1 t-111�11`-III=
5' x F x 54" THICK of 2 T FROM PIPE ,col �S 11-1 11-1 11-1 11-1 11-1 11-1 I ICI I I
fly
SEDIMENT CLEANOUT. 253.OD
{SEE DET�it�
BOTTOM OF POND: 252.00 - I I--11 I III -I 11-I 11-I 11-I 11-I 11-I 11-111-III-
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WET DETENTION POND #4 - PROFILE
VERTICAL: 1" = 10'
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DRAWING
SHEET
D-2.3
91 OF 105

295
290
285
280
275
270
265
260
255
250
I � r ,
LOT
711519 SQFT-' \
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SDMH#03
/ TOP. 270.75
IN: 262.74 (NE)
INV OUT: 262.74 (W)
� �,Isiislrslrsrrsrlsrlsllsllrllsllslrslrsrisris alQlls •I
o ��e
t FES#206 in
TOP: 264.99 265-SC M #5
INV IN: 262.11 (E)
r4' TOP 1
------- ----- W5E = 266
FOREBAY / BOT = 261
261.00
j . DISSIPATOR PAD
i `Z��•
ry�h
FINISH GRADE
' 14
c
FES#211
TOP: 262.25
INV IN: 259.37 (NW)
DISSIPATOR PAD
SPILL WAY
270.20
6:1 VEGETATED SHELF l \
Val N,
r, \
CB#152`
TOP:271.34
INV OUT: 267.09 (SW) ,
J
WET DETENTION POND #5 - PLAN
I LIDT -`_ 1 54_ - �k - I L�] �' +�I �� 56 M+�� LUr f } �� Tlx�
7,211 SQFrt. i - 7,245 SQFT_. r� � �7 j I {
r33 I1 y 8,234 SQFT- i 0-17 AC- i 0.17 AC. 7,223 SQFT.
7,993 SQFT_ 0.19 AC_ l i
_0-18 AC- _ f S + y - . 0.17 AC. .. 7'0�1 i AOFT.
' /7,711 SQFT_/ r
l + I t j • I / / 6�
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I + 1 1 L / /6,915 SQFT-
+ L / / 0-16 AC.
CID' 6:1 VEGETATED SHELF,
28'
26*
25' -i
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HORIZONTAL: 1" = 30'
GRAPHIC SCALE
30 7 15 36 60
4" MIN. TOPSOIL ON SHELF
6' WIDE VEGETATED SHELF
(PER NCDENR MDC) TOP OF POND: 271.00
EXISTING GRADE 6:1 MAX. SLOPE
_I SPILL WAY (25' WIDE)
-H I I L? BERM ELEV: 271.00 OCS#304 ELEV: 270.20
=1 i TOP OF RISER ELEV: 269.75 STA: 12+43.47 FES#211
`F� I TOP: 269.75 STA: 13+51.99
;� I -- FOREBAY BERM INV OUT: 26a.0a (SE) TOP: 262.25
4 I I TOP-ELVZ_265.50 INV: 259.37 (NW)
'Ikll=11� =I T----------
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41
ICI I ICI 11 �r FOREBAY .rMAIN PERMANENT POOL �� I Ithlll I I-
4" TOPSOIL MIN. ON SHELF
6' WIDE VEGETATED SHELF = I fII {I f jII II -
ANTI -SEEP COLLAf� (X2] SEEp _ _ -
(PER NCDENR MDC} 1=1 -I I -I 1=1 I- --1 �� SEDIMENT STORAGE:1262.0{l III- I=III COLLARS TO BE SPACED AID- { =I {
6:1 MAX. SLOPE II-Ia.:Ik�„III„Ik-„III k�I„III k� 19'4"ON CENTER. COLLARS Ik�I„Ik�'I 1k��-1I
1 ICI ICI I (BOTTOM OF POND: 261.00 ICI ICI k- 10rX 5' DISSIPATOR
SEDIMENT CLEANOUT: 262.00---;- ANTI -FLOATATION DEVICE SHALL BE PLACED A MINIMUM CLASS 1 STONE
BOTTOM OF POND: 261.00 OF 2 FEET FROM PIPE JOINTS.
_- 5' x 5' x 36" THICK (SEE DETAIL) THICKNESS =15"
Q In N C] N CA r Cp n 0 i0 C7 0 :D CA
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N N N N N N - 1 N N Cy N N N N
( IN FEET )
1 inch = 30 ft.
295 285
290 280
285 275
280 270
275 265
270 260
265 255
Zoo 250
255 245
250 240
FES#205
--TOP: 264.88 -- - / �rrftrrtrrft rr+lrsli�lryir�l
INV IN: 262.00 (NW) ¢'� cY;IN
sCM #s OCS#305
FOREBAY = - --- TOP: 268.75
261.00 INV OUT: 263.78 (SE)
(, - -- - 265 TOP = 270 2fi5
'SE = 266
-� ---- BOT = 261 - -
r-
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\ 270
270- w
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265 27D� n
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WET DETENTION POND #5 - PLAN
HORIZONTAL: 1" = 30'
120
I
FES#212
TOP: 264.27
INV IN: 261.40 (NW)
BERM ELEV: 270.00 OCS #305 TOP OF POND: 270.00
STA: 14+17.58
FINISH GRADE TOP: 268.75 SPILL WAY (20' WIDE)
TOP OF RISER ELEV: 268.75 INV: 263.78 (SE) ELEV: 269.25 FES#212
EXISTING GRADE FOREBAY BERM � STA: 14+66.90
TOP ELVE: 265.50 !--- TOP: 264.27
-- - - � `-------4-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 'I �; i- INV: 261.40 (NW)
. J �'
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FOREBAY ,, - MAIN PERMANENT POOL CLASS ----- '�--------------- --- �- - - - -1STONE
y �:1
THICKNESS =15"
SEDIMENT CLEANOUT: 2 2 I- 1 u 1 I k k 1=1 k 1 1 k 1=1 k I�I. .. .. .. I _ -I.I- .1=1.1
1 I. III III 1 I I!I I --1 11-1 I --I 11=1 I it III I I 1 1 I 1 111 1 1 1 I ICI SEOIMENTISTORAGE: 262-00, - 1
OTTO1111 OF POND: 261.00 -_ II iI I II_I ICI I ICI I I�dO bIPbN�:12811 �0 �= --1--I f 1=1 I I- 49 LF 30" RCP (c 4.83°Io
6' WIDE VEGETATED SHELF 6' WIDE VEGETATED SHELF
(PER NCDENR MDC) (PER NCDENR MDC) ANTI -SEEP COLLAR (X2) SEEP
6:1 MAX. SLOPE 6:1 MAX. SLOPE COLLARS TO BE SPACED AT
4" MIN. TOPSOIL ON SHELF 19'4" ON CENTER. COLLARS
4" TOPSOIL MIN. ON SHELF SHALL BE PLACED A MINIMUM
OF 2 FEET FROM PIPE JOINTS.
ANTI -FLOATATION DEVICE (SEE DETAIL)
5'x 5'x 36" THICK
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WET DETENTION POND #5 - PROFILE
VERTICAL: 1" = 10'
12+50 13+00 13+50 14+00 14+50 1+C3
WET DETENTION POND #6 - PROFILE
VERTICAL: 1" = 10'
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SHEET
D-2.4
92 OF 105