SW3190704_Plan_(Detail)_20200312

0+
690
685
680
675
670
665
660
I \ x
x
I 6SS
x
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SCALE: 1" = 10'
ON CENTER ALONG 4 LONGITUDINAL ROWS THAT ARE SPACED 90° APART. THE PIPES SHALL HAVE
A MINIMUM SLOPE OF 0.5%AND A MAXIMUM SPACING OF 10 FEET ON CENTER.
TOP OF FILTER
ELEV. 666.00
ELEV. 670.20
3" ORIFICE BLEEDER
INV. = 667.70 ORIFICE—\
TURNED DOWN
GROUND ELEV. AT
CONTROLSTIR UCTURE
ELEV. 666.00
PROP. SEDIMENTATION CHAMBER x / / _ R/W
AREA = 371 / a <
BOTTOM ELEV. = 666.00 /
/ / / PROVIDE A 6" LIP AT _
I x THE BOTTOM SLAB
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R RAP P.) / / / / / 3" ORIFICE BLEEDER
x x
RIPRAP BERM SEPARATIN / i ^h / / / / / INV. = 667.70 ORIFICE
SEDIMENTATION CHAMBER /
FROM SAND FILT R
TOP ELEV = 668.00
}
SEDIMENTATIO / / / 2
/ — — CHAMBER
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690
685
680
675
670
665
660
INSTALL METALTRASH RACK WITH
HINGES FOR MAINTENANCE ACCESS.
RACK TO HAVE 4" OPENINGS BETWEEN
BARS (RUST RESISTANT MATERIALS)
4' X 4' PRECAST
° CONCRETE RISER
STRUCTURE PER
NCDOT STD. 840.31
FLOW —
SIDE VIEW
STRUCTURE TOP
ELEV. 670.20
a
as
STEPS PER NCDOT
O STD. 840.66
a 6" PVC UNDER
DRAIN PIPE
INV = 662.50
a
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24" O-RING RCP \
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:.
x � / i • . :: �:/ / / / � / C2-FES / / / INV = 662.47
°
STABILIZE SAND F LTER
BASIN WITH A WASHhA
BASE BERMU A S D
/ /
-4 X 5 4CONTROLS CTU
x / i
SEE DETAIL THIS SHEE
U CLEANOUT (TYP.)
CAP ��
. 8 ABOVE TOP OF N
ITH REMOVABLE
P NDNO.1 CONSTRUCTION SEQUENCE
I BE USED AS A EROSION
OF THE PROJECT. CONTROL PRIOR TO ACCEPTTANCE OF THESAND FABASIN CONSTRUCTION SE
FILTER FOR THE ITEMS
DOST BE COMPLETED:
k X / A. THE POND MUST BE CLEANED OF ALL SEDIMENTS ACCUMULATED DURING CONSTRUCTION.
/ OP. ND LTER AR / / ' / / / / B. THE CONTROL STUCTURE SHALL BE INSTALLED PER THE DESIGN.
ARE = 845 F / / / / / C. ALL VEGATATIVE PLANTINGS SHALL BE/ESTABLISHED.
x \ ''4U TO ELE -6 i.
DN ONS 4 ' X 12'
.5
BMP NOTE.
DRAINAGE AREA MUST BE STABILIZED BEFORE
FILTRATION CONTROLS AND FILTER MEDIA ARE
INSTALLED.
/ STORMWATER BMP
/ 675 / / E ERD IN C LECTION SYSTEM SHALL BE EQUIPPED WITH 6"
ER
BMP EASEMENT / / / / I L HDFO PIPE. PER ORALE40NS SOHALLRBENGERPER , PVC PIPE
AASHTO M02 8DOUBLE FOR PVC
E, A HTO M252 FOR DOUBLE WALL HDPE PIPE, OR BE 3/8" IN
/ IA ER SP/XCED 3" ON CENTER ALONG 4 LONGITUDINAL ROWS THAT
xJ/x �x / / / / AR PAC ED 900 APART. THE PIPES SHALL HAVE A MINIMUM SLOPE OF
o x
x �C / / / / 0 � ANJ�A MAXIMUM SPACING OF 10 FEET ON CENTER.
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FRONT VIEW
CONTROL STRUCTURE DETAIL
NOT TO SCALE.
MAINTENANCE SCHEDULE
1. AFTER EVERY SIGNIFICANT RUNOFF PRODUCING RAINFALL EVENT AND AT LEAST MONTHLY:
A. INSPECT THE SYSTEM FOR SEDIMENT ACCUMULATION, EROSION, TRASH ACCUMULATION,
VEGETATED COVER, AND GENERAL CONDITION.
B. CHECK AND CLEAR THE ORIFICE OF ANY OBSTRUCTIONS SUCH THAT THE DRAWDOWN OF
THE TEMPORARY POOL OCCURS WITHIN 2 TO 5 DAYS AS DESIGNED.
2. REPAIR ERODED AREAS IMMEDIATELY. RE -SEED THE EMBANKMENT AS NECESSARY TO MAINTAIN GOOD
VEGETATIVE COVER. MOW VEGETATIVE COVER ON EMBANKMENT TO MAINTAIN MAXIMUM HEIGHT
OF SIX INCHES, REMOVE TRASH AS NEEDED.
3. INSPECT AND REPAIR THE COLLECTION SYSTEM (i.e. CATCH BASINS, PIPING, SWALES, RIPRAP, ETC.)
QUARTERLY TO MAINTAIN PROPER FUNCTIONING.
4. REMOVE WOODY VEGETATION NOT PART OF THE APPROVED PLAN ALONG THE DAM EMBANKMENT.
5. INSPECT FOR CLOGGING - RAKE DEBRIS SCREEN AND FIRST INCH OF SAND.
6. REMOVE SEDIMENT FROM FOREBAY/CHAMBER WHEN MORE THAN 1 FOOT OF STORAGE IS LOST.
7. SEDIMENT, TOPSOIL, AND 3 INCHES OF FILTER MATERIAL MUST BE REMOVED AFTER THE ALLOWABLE
DRAWDOWN TIME IS EXCEEDED BY 25 PERCENT.
8. ENTIRE FILTER MATERIAL AND UNDERDRAIN SYSTEM MUST BE REPLACED IF REMOVAL OF 3 INCHES OF
MEDIA DOES NOT RESTORE FILTRATION RATE.
9. PERFORM ANNUAL INSPECTION OF THE SAND FILTER (ANNUAL INSPECTION REPORTS TO BE KEPT BY
THE OWNER). PRIOR TO INSPECTION NOTIFICATION MUST BE GIVEN TO STORM WATER SERVICES.
X —x _x / / / / / / / GRAPHIC SCALE
X 10 0 5 10 20
� �X
x �x �x
x x
x—�x—x—x / IN FEET)
—x
/hAl PAN 6y5 x x x—x—x�L— Rw — — R/W _ 1inch =loft.
w — R/w _ _ R/xdv R/w �/W —�_� = x — X — x x x —
STIPULATION FOR REUSE
THIS DRAWING WAS PREPARED FOR USE
ON A SPECIFIC SITE, SKYLAND DRIVE
TOWNHOMES, S. SKYLAND DRIVE, MT.
PLEASANT, NC, CONTEMPORANEOUSLY
WITH ITS ISSUE DATE ON 10/07/19. AND
IT IS NOT SUITABLE FOR USE ON A
DIFFERENT PROJECT SITE OR AT A LATER
TIME. USE OF THIS DRAWING FOR
REFERENCE OR EXAMPLE ON ANOTHER
PROJECT REQUIRES THE SERVICES OF
PROPERLY LICENSED ARCHITECTS AND
ENGINEERS. REPRODUCTION OF THIS
DRAWING FOR REUSE ON ANOTHER
PROJECT IS NOT AUTHORIZED AND MAY
BE CONTRARY TO THE LAW.
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MODIFICATION LOG
JOB NUMBER: C190010
CHECKED BY: BMF
DRAWN BY: BHE
DATE: 10-07-2019
1,88E-0 # IN21IH
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BMP PLAN
SHEET:
C591