SW1210602_Plansheet - Misc. Detail_20210630

DocuSign Envelope ID: 61796BC1 -4762-4278-AF1 1-747CBB7384D7
MIN. COVER TO
RIGID PAVEMENT, H
if 6"
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SPRINGLINE
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4" FOR 12-24 PIPE
6" FOR 30"-60" PIPE
MIN. TRENCH WIDTH
(SEE TABLE)
NOTES:
FINAL
BACKFILL
MIN. COVER TO
FLEXIBLE PAVEMENT, H
INITIAL
BACKFILL
HAUNCH
BEDDING
SUITABLE
FOUNDATION
1. ALL PIPE SYSTEMS SHALL BE INSTALLED IN ACCORDANCE WITH ASTM D2321,
"STANDARD PRACTICE FOR UNDERGROUND INSTALLATION OF THERMOPLASTIC
PIPE FOR SEWERS AND OTHER GRAVITY FLOW APPLICATIONS", LATEST ADDITION
2. MEASURES SHOULD BE TAKEN TO PREVENT MIGRATION OF NATIVE FINES INTO
BACKFILL MATERIAL, WHEN REQUIRED.
3. FOUNDATION: WHERE THE TRENCH BOTTOM IS UNSTABLE, THE CONTRACTOR
SHALL EXCAVATE TO A DEPTH REQUIRED BY THE ENGINEER AND REPLACE WITH
SUITABLE MATERIAL AS SPECIFIED BY THE ENGINEER. AS AN ALTERNATIVE AND
AT THE DISCRETION OF THE DESIGN ENGINEER, THE TRENCH BOTTOM MAY BE
STABILIZED USING A GEOTEXTILE MATERIAL.
4. BEDDING: SUITABLE MATERIAL SHALL BE CLASS I, II OR III. THE CONTRACTOR
SHALL PROVIDE DOCUMENTATION FOR MATERIAL SPECIFICATION TO ENGINEER.
UNLESS OTHERWISE NOTED BY THE ENGINEER, MINIMUM BEDDING THICKNESS
SHALL BE 4" (100mm) FOR 4"-24" (100mm-600mm); 6" (150mm) FOR 30"-60"
(750mm-900mm).
5. INITIAL BACKFILL: SUITABLE MATERIAL SHALL BE CLASS I, II OR III IN THE PIPE
ZONE EXTENDING NOT LESS THAN 6" ABOVE CROWN OF PIPE. THE CONTRACTOR
SHALL PROVIDE DOCUMENTATION FOR MATERIAL SPECIFICATION TO ENGINEER.
MATERIAL SHALL BE INSTALLED AS REQUIRED IN ASTM D2321, LATEST EDITION.
6. MINIMUM COVER: MINIMUM COVER, H, IN NON -TRAFFIC APPLICATIONS (GRASS
OR LANDSCAPE AREAS) IS 12" FROM THE TOP OF PIPE TO GROUND SURFACE.
ADDITIONAL COVER MAY BE REQUIRED TO PREVENT FLOATATION. FOR TRAFFIC
APPLICATIONS, MINIMUM COVER, H, IS 12" UP TO 48" DIAMETER PIPE AND 24" OF
COVER FOR 54"-60" DIAMETER PIPE, MEASURED FROM TOP OF PIPE TO BOTTOM
OF FLEXIBLE PAVEMENT OR TO TOP OF RIGID PAVEMENT.
18" X 18" X 4" CONCRETE PAD
POURED AROUND ALL CLEAN OUTS.
UNLESS
STORM DRAINAGE
SCH 40 UNLESS
OTHERWISE NOTE[
ON PLANS
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RECOMMENDED MINIMUM TRENCH WIDTHS
PIPE DIAM.
MIN. TRENCH WIDTH
4"
21"
6"
23"
8"
26„
10"
28"
12"
30"
15"
34"
18"
39"
24"
48"
30"
56"
36"
64"
42"
72"
48"
80"
54"
88"
60"
96"
MINIMUM RECOMMENDED COVER BASED ON
VEHICLE LOADING CONDITIONS
SURFACE LIVE LOADING CONDITION
PIPE DIAM.
H-25
HEAVY CONSTRUCTION
(75T AXLE LOAD)
12" - 48"
12"
48"
54" - 60"
24"
60"
VEHICLES IN EXCESS OF 75T MAY REQUIRE ADDITIONAL COVER
MINIMUM RECOMMENDED COVER BASED
ON RAILWAY LOADING CONDITIONS
PIPE DIAM.
COOPER
E-80**
UP TO 24"
24"
30"-36"
36"
42"-60"
j 48"
** COVER IS MEASURED FROM TOP OF PIPE TO BOTTOM
OF RAILWAY TIE.
*** E-80 COVER REQUIREMENTS, ARE ONLY APPLICABLE
TO ASTM F 2306 PIPE.
TYPICAL HDPE STORM DRAINAGE TRENCH DETAIL
# 107 VALVE BOX & LID
PVC COMBINATION
ROOF LEADER
CLEANOUT DETAIL
N.T.S.
NOT TO SCALE
FINISHED
GRADE —
MANHOLE RING & COVER CURB TRANSITION TYPICAL ALL CURB
X INLET LOCATIONS BOTH SIDES OF INLET
— CATCH BASIN
6" I� CULVERT 12" 5, 5 BACK OF CURB
000000 2�
000000
PIER (TYP.) INSTALL MANHOLE RING & F CE OF CURB LIP OF GUTTER
COVER IN TOP OF OTCB STANDARD CURB & GUTTER
CONCRETE COVER TOP ELEV. AS NOTED
ON PLANS CURB TRANSITION AT CURB INLET
PIER NOT TO SCALE
FLOW FLOW
6 OPENING FRAME, GRATE &HOOD BY
TINDALL OR APPROVED EQUAL
FINISH GRADE
ASPHALT
III- I II I I —
VARIES REINFORCED ;: ,.;:,:_;.::<,.;:.,:..,,,,. ; — 8„
PROPOSED STEPS PRECAST BOX WITH I IIIII i �-
12" C—C MIN. KNOCKOUT PANELS I III— — -
16" C—C MAX.—
(TYP.) CULVERT
TOP GRATE
ELEV. AS
1= NOTED
INV. ELEV. 0 0000000 000000000 = 6" MIN VARIES AS REQ'D PRECAST CONCRETE BOX
AS NOTED = WITH KNOCKOUT PANELS
ON PLANS 1 = 8" PRECAST CONC. BASE AS MANE. BY TINDALL OR
APPROVED EQUAL
WELL COMPACTED #67 STONE,
#57 STONE SUBGRADE COMPACTED
COMPACTED OPEN THROAT CATCH BASIN 6„
WITH MANHOLE RING & COVER —00— 6" MIN
0000000000000000—
NOT TO SCALE — o0 0 0 0 0 0 0 0 0 0 0 =
COMPACTED SUBGRADE
�4,000 PSI CONCRETE
6" 4" OF CABC MINIMUM
UNDER FLUME EXTENDED
6" PAST CURB
CONCRETE FLUME FOR 8I0—RETENTION CELLS SECTION
N.T.S.
EXTEND FLUME TO BOTTOM
OF BIO—RETENTION
CELL (12" LEVEL)
I
CURB & GUTTER
\-4,000 PSI CONCRETE
VFW-,-" 4" OF CABC MINIMUM
UNDER FLUME
OUTLET PROTECTION AS NOTED ON PLANS
CONCRETE FLUME FOR BIO—RETENTION CELLS DETAIL
N.T.S.
6" HIGH
CURB
CONCRETE END TREATMENT
NOT TO SCALE
CURB INLET
NOT TO SCALE
WGLA ENGINEERING, PLLC
724 5th AVENUE WEST
HENDERSONVILLE, NC 28739
[phone]
WGLA.COM
INC LICENSE P-1342
SunCap
PROPERTY GROUP"
Suncap
Warehouse
Town of Mills River
Henderson County
North Carolina
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REVISIONS
DATE
DESCRIP11ON
V
Know what's below.
Call before you dig.
PROJECT NUMBER: 20176
DATE: 4/21
DRAWN BY: KHC
CHECKED BY: WRB
Storm Drainage Details
C-306
SCALE: As -Noted -On -Sheet