SW4210803_Plansheet C-8.0 - SCM Detail_20220120

TECHNICAL SPECIFICATIONS:
1. SUBGRADE TO BE PROOF ROLLED PRIOR TO EARTH FILL PLACEMENT. ANY SOFT OR PUMPING AREAS
ARE TO BE UNDERCUT AND REPLACED WITH COMPACTED EARTH FILL.
2. COMPACTED EARTH FILL TO HAVE DRY UNIT WEIGHT OF AT LEAST 90 PCF. ALL EARTH FILL TO BE
COMPACTED TO A MINIMUM OF 95% OF STD. PROCTOR MAXIMUM DRY DENSITY.
3. EXCAVATED SIDE SLOPES TO BE STABILIZED WITH GRASS COVER IN ACCORDANCE WITH SEEDING
SPECIFICATIONS FROM EROSION & SEDIMENT CONTROL PLAN.
4. FINAL EMBANKMENT SLOPES TO BE TRACKED AND STABILIZED WITH GRASS COVER IN ACCORDANCE
WITH SEEDING SPECIFICATIONS FROM EROSION & SEDIMENT CONTROL PLAN.
5. REINFORCED CONCRETE RISER STRUCTURE TO BE PREFABRICATED 4 FT x 4 FT INTERIOR
DIMENSIONS.
6. ALL SLOPES/EMBANKMENTS AROUND SCM POND SHOULD BE STABILIZED WITH NON -CLUMPING TURF
GRASS.
5 FT X 5 FT CONCRETE RISFR
(4 FT X 4 F-
W/ TRA'
TOP — 836.50
INV = 829.50
6.5' x 6.5' >
ANTI-FLOATION BLOB .
RISER DETAIL
NTS
ANTI -VORTEX PLATE
PROVIDE 5 STEPS
(NCDOT 840.66)
6" INV IN: 833.00 WITH TRASH
RACK AT BASE OF POND (SEE
DETAIL THIS PAGE)
8" INV OUT: 830.00
Cn v A
�L
6" 6"
PRECAST CONCRETE RISER
SECTIONS
JOINTS SHALL BE SEALED b
WITH MASTIC CAULK. O PROVIDE 5 STEPS
INSIDE JOINTS SHALL BE 4, �(NCDOT 840.66)
GROUTED.
CONCRETE ANCHOR
SECTION A —A
RISER DETAIL
NTS
Know whafs below.
Call before you dig.
CONCRETE KEYWAY
ANTI -VORTEX PLAT
HINGED TO
CONCRETE RISER
i
RISER TRASH RA CK
NTS
18"
TOP OF BERM: 839.00
1 I" I "I \ 1 rl LJ - `ivill 1 1 JVV 1
OR GRAVEL BEDDING
RIP RAP LINED EMERGENCY SPILLWAY DETAIL
NTS
n
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Isometric
pculvert
single
orifice
1/4" HDPE plate
/ bolted to structure.
/ HDPE structural plastic
1/4" plate and grating
with 1" holes and a min.
1 of 30% of opening area
�1 manufactured by Plastic
Solutions Inc. or equal.
cone. apron
ric_vauiu.a
* shown with optional plate
HDPE structural plastic
1/4" plate and grating
with 1" holes and a min.
30% of opening area
Manufactured by Plastic
Autions Inc. or equal
PLASTIC
P.O. Box 4386
SOLUTIONS Winchester VA 22604
INC. 877-877-5727
www.plastic-solution.com
+ +
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841
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PROFILE ALIGNMENT
8
STABILIZE THE ENTIRE BASIN BOTTOM,
SIDE SLOPES, AND TOP) WITH A CLEAN
WASHED BERMUDA SOD
ALL SLOPESIEMBANKMENTS SURROUNDING 1+OU r
SCM POND MUST BE STABILIZED WITH'
SCM RISER
NON -CLUMPING TURF GRASS / ,
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-15'WIDE EMERGENCY SPILLWAY
(SEE DETAIL THIS SHEET)
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OUTLET DEVICES
SPILLWAY
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PROP
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VERTICAL GRAPHIC SCALE
3' 0 1.5' 3' 6' 12'
( IN FEET)
1 INCH = 3 FT.
GRAPHIC SCALE
30' 0 15' 30' 60' 120'
( IN FEET)
1 inch = 30 ft.
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PROJECT INFORMATION
PROJECT MANAGER:
DEB
DESIGNED BY:
JWF
DRAWN BY:
MSS
PROJECT NUMBER:
IV18.400
ORIGINAL DATE:
TBD
SHEET:
C-8.0