HomeMy WebLinkAboutSW6210905_Plansheet - SCM Detail_202109273
5
D
C
VELOCITY RIP -RAP
DISSIPATOR PAD
16'X7.5' 18"D
CLASS B
FES #1
ELEV 261.50
20' WIDE
EMERGENCY
SPILLWAY
ELEV 267.75
LIMITS OF
DISTURBANCE
6'
LITTORAL
SHELF
NORMAL
WATER
ELEV. 264.50
Ai
IIIIIIII
FOREBAY
ELEV. 264.50
VELOCITY RIP -RAP
DISSIPATOR PAD
14'X6' 18"D
CLASS B
F1�'BW
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IIIO� I10*0 W 111111111119' �idWNM iYYYYYYNM�llllllllllllllllll�,MNrY,WWWWW�IIIIIIIIF�MNM Illllllllll hllllllllllllllllllhllllllllllllllllll IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIII �IIIIIIIIF�Illlllllllllllllll�llllllllllllllllllhllllllllllllllllllNIIIIIIIIF�IIIIIIIIF�lllllllllllllllllll IIIIIIIIIIIIIII �IIIIIIIIIIIIIIIIII hIIIIIIIIIIIIIIIIIINIIIIIIIIF Illllllllll h
REMOVABLE WHEEL
TO DRAIN VALVE
SILL ELEV. ON 3 SIDES (267.0 12" MI
3" TEE INV. (264.5
W/ 1.75" ORIFICE
PERMANENT POOL ELEV.
8" CM -S_
(WATERPROOFED) OR
PRECAST EQUIVALENT
4" DRAIN PIPE--_.
W/ GATE VALVE
4" CONC PAS ----
INSTALL MH ACCESS COVER
W/ PULL HANDLES
(PROVIDE ACCESS LADDER DOWN
INSIDE OF CONTROL STRUCTURE)
8" THICK 3,000 PSI CONC.
TOP SLAB W/ #4 REBAR
® 6" O.C. IN EACH DIRECTION
i 8"x8" CMU CORNER SUPPORTS
FOR TOP SLAB
4" MIN. OPEN
4' RECTANGULAR WEIR (266.00)
TO R PI RAP
PAD
3,000 PSI CONC.-/ 5' �2
5'
W/ #5 REBAR ® 16" 30" RCP
O.C. BOTH DIRECTIONS INV=263.00
BOTTOM C.S. (263.00
CONTROL STRUCTURE DETAIL
N TS
WET POND PLANT LIST
KEY QTY BOTANICAL NAME COMMON NAME REMARKS
WET POND
LITTORAL SHELF - 2,420 SF /200 x 50 = 605 PLUGS REQUIRED
CT
151
Carex tenera*
Quill Sedge
3" x
2.5"
SQUARE
PLUGS
(MIN)
EM
151
Eupotoriodelphus moculatus
Spotted trumpetweed
3" x
2.5"
SQUARE
PLUGS
(MIN)
PV
152
Peltandro virginica
Arrow arum
3" x
2.5"
SQUARE
PLUGS
(MIN)
SA
151
Schoenoplectus americanus
Three -square bulrush
3" x
2.5"
SQUARE
PLUGS
(MIN)
SLOPE STABILIZATION GRASSES
CENTIPEDE
GRASS
5,115 SF
�Eremochloo ophiuroides
SEED
AT 50 LBS.
PER ACRE
WET POND PLANTING LEGEND
CENTIPEDE GRASS >> / /
(10,187 SF.)
LITTORAL SHELF""'
PLANTINGS (2,420 SF.)
NOTES:
*EVERGREEN SPECIES
CONCRETE ANTI-BOUYANCY FOOTING CALCULATIONS
DISPLACED VOLUME
V=(5')(5')(4'+1')= 125 C.F.
DISPLACE WATER=(125 CF)(62.4 PCF)=7,800 LBS
ADD 15% FACTOR OF SAFETY=8,970 LBS
WEIGHT OF STRUCTURE
WALLS=(2)(5'+3.67')(4')(8"/12")(150 PCF)=6936 LBS
BASE=(5')(5')(1.5')(150 PCF)=5,625 LBS
15" RCP=(3.14)(0.625-2)(8"/12")(150 PCF)=-123 LBS
STRUCTURE WEIGHT=12,438 LBS > 8,970 LBS
WT. OF TOP SLAB=(5')(5')(8"/12")(150 PCF)=2,500 LBS
Table it Clay Lin& S 1edb (Swru- VAD IR, 1999).
PTa,perty
IPermeabi1ity
Test Method Unit,
ASTM 10-2434 Cm/sec
Speciffcation
1. x 10'6
P lastibity Index a1 CIay,
ASTM ID423/424
Not less than 1
UgUid Limit of Clad,
ASTM D-2 1,6
Not Iess than 30
Clay Particles Passing
Clay Compaction
ASTIM ID-42
ASTIM D- 216
Clot less than 3CO
95 of standard proctor densit °
EL
FINISHED GRADE
SOIL-01
2' THICK CONCRETE
ANTI -SEEP COLLAR
MINIMUM SIDE
CLEARANCE
ANTI -SEEP COLLAR
(USE ON CULVERTS THROUGH BERMS)
NOTES:
1. No rocks or boulders 3" or larger to be used in backfill.
2. All backfiI material shall be suitable native or imported material.
3. Backfill shall be tamped in 6" lifts in berms.
4. Achieve 95% compaction (Standard proctor) in berm areas.
UNDISTURBED
BACKFILL
a_
• <
SPRING LINE
a.�
LOW LINE
•
6'
O,D, OF
PIPE'
6'
TOP OF BERM
�I' 1IIPA
-11
11=
GRADING & EROSION CONTROL NOTES
1. ALL MATERIALS AND METHODS OF CONSTRUCTION SHALL BE IN ACCORDANCE WITH
THE HARNETT COUNTY AND THE STATE OF NORTH CAROLINA STANDARDS AND
SPECIFICATIONS.
2. CONTRACTOR SHALL HAVE NORTH CAROLINA ONE CALL (811) TO LOCATE ALL
EXISTING UTILITIES PRIOR TO BEGINNING CONSTRUCTION.
3. CONTRACTOR SHALL VERIFY THE LOCATION AND DEPTH OF ALL EXISTING UTILITIES
AND NOTIFY THE ENGINEER OF ANY DISCREPANCIES OR CONFLICTS PRIOR TO
BEGINNING CONSTRUCTION.
4. ALL CONSTRUCTION SHALL CONFORM TO A.D.A. STANDARDS.
5. THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING, COORDINATING, AND
PAYMENT FOR ALL NECESSARY LOCATING SERVICES INCLUDING INDEPENDENT LOCATING
SERVICES. THE CONTRACTOR SHALL HAVE ALL EXISTING UTILITIES LOCATED AT LEAST
48 HOURS PRIOR TO BEGINNING DEMOLITION, EXCAVATION, OR ANY OTHER FORM OF
CONSTRUCTION. THE CONTRACTOR SHALL IMMEDIATELY NOTIFY THE OWNER'S
REPRESENTATIVE OR ANY DISCREPANCIES OR CONFLICTS.
6. EXISTING IMPROVEMENTS DAMAGED OR DESTROYED BY THE CONTRACTOR DURING
CONSTRUCTION SHALL BE RESTORED OR REPLACED TO ORIGINAL CONDITION AND TO
THE SATISFACTION OF THE OWNER'S REPRESENTATIVE AT THE CONTRACTOR'S
EXPENSE.
7. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ENSURING ALL PERMITS, INSPECTIONS,
CERTIFICATIONS, AND OTHER REQUIREMENTS WHICH MUST BE MET UNDER THIS
CONTRACT ARE OBTAINED.
8. IF DEPARTURES FROM THE PROJECT DRAWINGS OR SPECIFICATIONS ARE DEEMED
NECESSARY BY THE CONTRACTOR, DETAILS OF SUCH DEPARTURES AND REASONS
THEREFOR SHALL BE SUBMITTED TO THE OWNER'S REPRESENTATIVE FOR REVIEW
PRIOR TO CONSTRUCTION. NO DEPARTURES FROM THE CONTRACT DOCUMENTS SHALL
BE MADE WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE OWNER'S
REPRESENTATIVE.
9. THE ENGINEER DISCLAIMS ANY ROLE IN THE CONSTRUCTION MEANS AND/OR METHODS
ASSOCIATED WITH THE PROJECT AS SET FORTH IN THESE PLANS.
10. THE STREETS IN FRONT OF THE PROJECT WILL BE KEPT CLEAN AT ALL TIMES OR A
WASH STATION WILL BE REQUIRED.
VARIES*
20'
SPILLWAY
ELEV.
VARIES*
TOP OF BERM
1 � Q _IIIIII IIIIII 1' MIN.
11=
=11 _ 11=
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CLASS B RIP -RAP
18" THICK
10' WIDE TOP OF DAM (269.0)
6' VEGETATED FOREBAY DAM 100 YR STORM WSEL
SHELF (6:1 SLOPE) (TOP ELEV 264.5) (ELEV 267.95) CONTROL STRUCTURE
(SEE DETAIL THIS SHEET)
- - - - - - - - - - - - - - - - - - - - _ _ _ _ _ _ _ _ _ _ 6' VEGETATED
j NORMAL WATER LEVEL (264.5) SHELF
sl (6:1 SLOPE)
OA
F
- :- - - - - - - - - - - - -
INLET PIPE Q�
m
r, FOREBAY SEDIMENT CLEAN OUT MAIN POND
13
�O - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
A
F
CLASS B RIPRAP
PROVIDE 6" CLAY LINER. 67.0 LF OF 30"
POND BOTTOM (260.0) INSTALL 6" OF TOPSOIL ABOVE
CLAY LINER AT VEGETATED SHELF.
LINER MUST BE INSTALL 12"
ABOVE NORMAL WATER LEVEL
WET DETENTION BASIN DETAIL
ANTI -SEEP
- GEOFABRIC
UNDERLAYMENT *SIDE SLOPE SHALL BE MAX. 3:1
(GEOTEX 1001 OR SPILLWAY DEPTH X 3 = SIDE SLOPE LENGTH
EQUIVALENT)
EMERGENCY SPILLWAY
N TS
NORTH
STORMWATER PLAN
SCALE: 1 = 20' (DRAWING SCALED FOR 24x36 INCH PLOTS)
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LICENSE NO. P-0803
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Checked
By SRN
DATE:
30 JUN 2021
REVISED:
1L16 SEP 2021
Ld
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PLANS
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STORMWATER
PLAN
a
Job
Code HCSS1