SW4100701_APPROVED PLANS_20100802

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW�&l
DOC TYPE
❑ CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
DOC DATE
„wOLv
YYYYMMDD

M M @mr mo ®, Mr ®, M, M, M1 = = M.
c r ww4 {
Approved 5toltnwatiermr! Documents
�.
— OGERa g' `41
M Construction in accord. Ice with these documents is
P, m a �. _:
} ., '� required by the storm ater permit. North ( 3rofina
�.¢,,3' rules require that th stormwater system de igner
k, .,? _� Inspect during con ruction; certify conformit with the
q;+Y` y3s g plans and specs' d certify compliance with I e
stormwater rules. { 15A NCAC 2H .1008 (j) )
� I Permit#_SWyi07or Date 2 rc
by C'L�_. NC Division of Water ual�
Shoot d !L-1 RavIdIon Date_ 4
C �
DRAINAGE AREA=6.03t ACRES,
INCLUDING 1.38+ ACRES FROM OFFSITE
TOTAL ACREAGE=4.65t ACRES
NO WETLANDS EXIST WITIIIN THE
avow PROPERTY LIMITS.
+,W OAPO
'a SEAL r' -
023450
'rrrrti4tirt+�
"SITE MAP"
(INCL. EX. DEVELOPMENT,
& DRAINAGE BASIN)
1 "=60'
RIP_RAP ._ _ p gy y
PAWD
U
Y Ix '
1 / I /� / W
AN POINT I , .
EX. PIPE
PAYED
:$ + I v fie. I / 1 /
CRATE
-175.1s� II 1 V
tw7-t75.t�
GRATL-178.35
NS(se^1-m.5s f X I J'/
AH
CRATEca -194.e7
E%,
O
cD / ro _
WATE mac_ \ -
INY.1e8.48
uN
roPls"-,eels\
Allied Design, Inc.
STORMWATER MANAGEMENT PLAN CIVIL ENGINE;ERINGOLANDSURVEYING
4720 LORI 0. COE MD OFFICE BUILDING WINST 5 -SALER ILLNOAD
W [NSTON-SALEM, NORTH CAROI.INA 27103
Phone: [phone]
(33 8886NORTH RIDGE PARK ROAD htlp:Ilwww.all-utipng u rv. c um
PROJ
09-033
RURAL HALL, NC DATE:
NO.: JUNE 2010
SKETCH NO.: SWM 1
0

L
SOD (REQUIRED FOR FIRST
PLANTING YEAR). SEE ADDITIONAL
NOTES IN SECTION A-A-
WIRE SCREENING AROUND
ALL OUTLET OPENINGS. . . . . . . «
OUTLET PIPE CONNECT TO -----+
STORM DRAINAGE SYSTEM)
f
« . .
' . . .. . . qQ .. . . . .
PROVIDE 30' DEPRESSION AND LINE WITH RIPRAP FOR PLUNGE
POOL PRETREATMENT AND ENERGY DISSIPATION. (TYP. FOR
ALL CONCENTRATED (PIPE) FLOW LOCATIONS - SEE SHEET SWM
2 FOR LOCATIONS).
BIORETENTION PLAN — SCHEMATIC
NOT TO SCALE
AMENDED FROM CITY OF CHARLOTTE STOS. BMP FIG. 4.1.2
SOIL PARAMETERS
(HOMOGENOUS MIX)
85-88% SAND
8-12% FINES (CLAY & SILT)
3-5% ORGANICS (PEAT MOSS)
INFILTRATION RATE = 0.52 IN/HOUR (MIN.) TO 1.5 (MAX.)
P-INDEX 10 30
1
I
CLEANOUT (TOP ABOVE
MAXIMUM PONDING
ELEVATION, AT 100
FEET MAX. SPACING)
NOTES:
1, ALL DRAINAGE AREAS TO A BIORETENTION FACILITY
ARE TO BE STABILIZED PRIOR TO INSTALLATION OF
AMENDED SOILS, MULCH OR PLANTINGS.
2. AMENDED SOIL INSTALLATION WILL ONLY BE
ALLOWED AND APPROVED WITH A VALID SOIL
ANALYSIS REPORT.
3. INSTALL WIRE SCREENING AROUND ALL OUTLET
OPENINGS TO PREVENT LOSS OF MULCH.
4. WRAP PERFORATED UNDERDRAIN WITH FILTER
FABRIC PRIOR TO BACKFILLING.
5. UNDERDRAIN PIPE SHOULD HAVE 318" PERFORATIONS
SPACED AT 6" CENTERS, MIN. 4 HOLES PER ROW. MAX
SPACING OF UNDERDRAIN PIPE IS 10 FEET ON
CENTER,
S. IN -SITU SOILS MUST NOT BE COMPACTED. ONCE THE
CELL IS EXCAVATED, NO HEAVY EQUIPMENT OR
OTHER MATERIALS SHALL BE STORED WITHIN THE
LIMITS OF THE EXCAVATION.
7. DURING EXCAVATION, RAKE TRENCH BOTTOM WITH
BUCKET TEETH AND LEAVE IN A ROUGHENED
CONDITION TO PROMOTE INFILTRATION. (I.E. DO NOT
SEAL SOIL BY SMOOTHING WITH THE BACKSIDE OF
THE BUCKET.)
OVERFLOW OUTLET COVERED
W[TH WIRE MESH
THROAT 183.95
I NV. OUT=178.60
PEA GRAVEL CURTAIN
(ADJACENT TO PAVEMENT)
GRASS LAYER, TO BE SODDED (NOT
SEEDED). SOD MAST NOT BE GRQWN
IN SQIL !HAT H AN IMPFRMEAB
ILMR SUCH AS CLAY.
OUTLET PIPE~:5
6" DIAMETER PERFORATED
UNDERDRAIN PIPE - PVC
(PER AASHTO M252) OR
HDPE WITH SMOOTH INNER
WALL, PROTECTED WITH
FILTER FABRIC.
4' MIN.
O
v
7
���ri deer
z o
-=
ck: 0—i �
-Cc ItE-
Q
=U:U1
. Y •.od,
i d
O�100
."
`
�Wj
,,'`�frrrrrl��tit����,,```
m
UNDERDRAIN
GRAVEL BED (#57
WASHED STONE)
SECTION A —A
NOT TO SCALE
v
EE'Oa,3� al
E E0�E3
p n r E o y m v o m
^� o2 C coo m c O
Z T�.c��
92- £ -CEL I E 'm
q 3 �uCli
0U U 0
?L
L Q Z
sue. m.4i=U�
r�Z c
3 m y Q h
N.cLt
P �l _ N
`a �a c is # J
� c'n E a nc
g� m
m
�U am a a N
12" WQ
PONDING
2'-0" FILTER MEDIA -
SEE SOIL PARAMETERS
(THIS PAGE).
V-0" GRAVEL
LAYER
FILTER FABRIC
AROUND UNDERDRAIN
GRAVEL BED (BOTTOM
AND SIDES (TYP.)
M1 O r'7
o
r7
p0:2
z
�
INS
MZ(n
U
z
a
<x
E
a
❑�
¢0 z
innll�� O
00 �
a
T,�
G
Q
iP'^m
4
x4
. .
Q
<3�f
-
z O
z
H
V =
O�w
0_ Q Y
O-QCn
Q
W
^Z
O
w
oz
O
O
1 -
I hL X09,

Piz IiiiIIIIIIIN
® ®` � do Mr wiiiiiiiiii
C
THE DESIGN INFORMATION SHOWN HEREIN IS ;'�Q~.� ESS I OZ
EITHER TAKEN FROM OR SHALL BE TRANSFERRED : Y
TO THE CONSTRUCTION DRAWINGS; IT IS = SEAL r`-
PRESENTED IN THIS FORMAT TO ISOLATE THE - 023450`
PERTINENT INFORMATION TO THE STORMWATER MODIFIED DRAINAGE LIMITS. ;y
MANAGEMENT AND TO PROVIDE A FORMAT MORE AND MINOR .
EASILY BOUND TOGETHER IN A BOOKLET WITH OFFSITE FLOWS (, �'� ........ ...•1��%` �0
• DP' ,v{-
OTHER REQUIRED PERMIT DOCUMENTATION. UNDEVELOPED PORTIONS OF
RAP RAP THE SITE WILL BYPASS THE
~ BIOCELL VIA PROPOSED DITCH. "PROPOSED DEVELOPMENT" Erp _ NEW DRAINAGE ACR,EAGE�4.27
Approved Stormwater P t cu
1 Construction in accordance wi s doc
required by the stormwater ¢� I Nc th C t
3 1 1 $ \ rules require that the staFmwa s t de
:.Y Inspect during cons5fruction; c 1 I o rC40 i
nd
plans and spars; acertify C n I��
storrnwater rules. 15A NCAC } (!) 4
rsa } Permit
by �. =tlC i s f
Shoot # ►k Ft
f 1 6 4 el
Pl�,OP05ED 2 STORY
M•EDICAL\OF ICE1
FFF�=202.
W\ �, 1BSMT FEV8 .7 1 ;
1 t' 30" DEPI�S41ON
1
i jy ,PL GE6`POOL\OLLx16'�OSHT }NED}WITH CL SS 6 (d50�6") / / 1
/
l l / O� /
14� (MN.)'1jH1CK.
1
•'E � % ,�'7 � >y � (�I sue° . � � / � I
PI
6 \• , ( / S 1
94
BIORETENTION CELL
0
-•-�--`—` ----_—--�.._..� �, \ e, -I. •1 1} EX. [,REE
(TOR MAIN)
(SEE S WM 3 FOR DETAILS)
DESIGN DRAINAGE AREA = 4.27 AC s �
IMPERVIOUS FRACTION = 0.2740 all
RUNOFF COEFFICIENT = 0,2966-
��``,
RUNOFF VOLUME = 4,683 CF LANQS�APE0 AREA . \
PONDING DEPTH = 1 i %" (11.4")
SURFACE AREA (AS SHOWN) = 4,950 SF
AVERAGE WIDTH = 30'
AVERAGE LENGTH = 165' ft p141pk /
ELEVATION OF SURFACE MEDIA = 183.0 -D
CLEANOUT PIPES REQUIRED = 5
Allied Design, Inc.
STOR.MWATER MANAGEMENT PLAN ,t, CIVIL ENGINEERING4LAND SURVEYING
LDRI 0. COE MD WIN OFFICE BUILDING ///}+`(\ ' -CR MILL ROAD
' W]NSTONSALEh1, NOR'i'lI CAROLINA 27103
I'hunc: (3361765-2377
NORTHRIDGE PARK ROAD Fax: (379G
h,tp alwww.a 1I I 1iiCdcd-cngsurv.cum
PROJECT NO.: 09-033
RURAL HALL, NC DATE: JUNE 2010
SKETCH NO.: SWIM 2