SW4200501_C07.04_20200702

TEMPORARY FAIRCLOTH SKIMMER
DIAMETER: S
CONNECT FLEXIBLE PIPE
TO POND DRAIN. GATE
VALVE SHALL REMAIN
OPEN. REMOVE SKIMMER
ONCE POND IS NO LONGER
UTILIZED AS TEMPORARY
SEDIMENT BASIN.
O
FLEXIBLE PIPE
PRIMARY SPILLWAY
DIAMETER: Q
TEMPORARY SEDIMENT BASIN NOTES:
1. INSPECT DEVICE AFTER EACH RAINFALL. REMOVE SEDIMENT WHEN SEDIMENT
REACHES A DEPTH OF NO MORE THAN ONE-HALF THE HEIGHT OF THE RISER.
REPAIR BAFFLES IF DAMAGED.
2. PULL SKIMMER TO SIDE OF BASIN WITH ROPE AND INSPECT REGULARLY. KEEP
SKIMMER HEAD, ORIFICE AND PIPE FREE OF DEBRIS. REMOVE SEDIMENT FROM
BENEATH SKIMMER AND ENUSRE VEGETATION DOES NOT INTERFERE WITH SKIMMER
OPERA RON.
3. PROVIDE PAINT MARK ON RISER AT 12" HEIGHT. CLEAN AND REPAIR ONCE
SEDIMENT REACHES MARK.
4. INSTALL ALL COMPONENTS OF POND EMBANKMENT, OUTLET STRUCTURE, SKIMMER,
EMERGENCY SPILLWAY, ETC. (UNLESS NOTED) PRIOR TO BEGINING CLEARING
OPERATIONS
5. SEE SHEET COZ05 FOR TEMPORARY BAFFLE INSTALLATION.
EMERGENCY SPILLWAY SECTION
SCALE: N.T.S.
INSTALL SLOPE PROTECTION MATTING
ON ALL SLOPES STEEPER THAN 6:1
10'
TOP OF EMBANKMENT ELEV.: G
LENGTH I 3/j LENGTH
3 \/\I/\I/ EMER. SPILLWkY CREST ELEV.: F \
I -III H
\/ EMERGENCY
MERCUT ENCTO EXSSTING44 444444
�IIIIIIIIII =
EMBANKMENT SECTION AT EMERGENCY SPILLWAY
SCALE: N.T.S.
OUTSIDE EDGE OF SHELF SHALL BE
6-IN ABOVE PERMANENT POOL
ELEV.: W
6' VEG. SHELF
1\ 6:1 SLOPE TOWARDS POND
EXTEND CLAY LINER
TO 6" ABOVE PERM.
POOL ELEV.
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STONE ON FILTER FABRIC
3
�1
INSIDE EDGE OF SHELF SHALL BE
6-IN BELOW PERMANENT POOL
ELEV.: X
- PERMANENT POOL
ELEV: B
FOREBAY
3 1
-_ A.
FOREBAY BOTTOM AT ENTRANCE/SEDIMENT
STORAGE TOP = 821.50
EXCAVATE SEDIMENT STORAGE TO ELEV. = 821.00
FOREBAY BOTTOM AT EXIT/SEDIMENT
STORAGE TOP = 822.00
EXCAVATE SEDIMENT STORAGE TO
ELEV. = 821.50
�I 5\TEPS
I
PVC DRAIN WITH GATE _
VALVE AND HAND WHEEL.
ANCHOR TO OUTLET STRUCTURE.
VAVLE TO BE OPEN DURING
CONSTRUCTION.
DIAMETER: R
8" I J
18" THICK CLASS 'A'
STONE ON FILTER FABRIC
PLAN VIEW
4'
TOE OF SLOPE
Y
OUTLET -
BARREL: K
POND SCHEDULE
SCM NUMBER
1
DESCRIPTION
SCM NUMBER
1
DESCRIPTION
A (FT)
823.50
BARREL OUTLET ELEVATION
Q (IN)
2.5
PRIMARY SPILLWAY ORIFICE
B (FT)
PRIMARY SPILLWAY CONTROL ELEVATION
R (IN)
S (IN)
6
4 & 4
DRAIN VALVE DIAMETER
SKIMMER DIAMETER & ORIFICE DIAMETER
C (FT)
827.50
3 SECONDARY SPILLWAY ELEVATION
D (FT)
8
RIM ELEVATION
T (FT)
826.50
TEMPORARY SEDIMENT STORAGE ELEVATION
E (FT)
831.00
TOP SLAB ELEVATION
U (FT)
822.50
POND SEDIMENT STORAGE BOTTOM ELEV.
F (FT)
830.00
EMERGENCY SPILLWAY CREST ELEVATION
V (FT)
SEE SECTION
VIEW THIS SHEET.
FOREBAY SEDIMENT STORAGE BOTTOM ELEV.
G (FT)
832.00
TOP OF EMBANKMENT ELEVATION
W (FT)
827.00
TOP OF VEGETATIVE SHELF
H (FT)
823.20
INVERT OUT OF BARREL
X (FT)
826.00
BOTTOM OF VEGETATIVE SHELF
1 (FT)
5
OUTLET STRUCTURE INTERIOR WIDTH
J (FT)
4
OUTLET STRUCTURE INTERIOR LENGTH
1-YR STORM ELEVV,
827.74'
K
62 LF 30"RCP
OUTLET BARREL
2-YR STORM ELEVV,
828.00'
L (FT)
10
EMERGENCY SPILLWAY WIDTH
10-YR STORM ELEV.
828.86'
M (IN)
12
SECONDARY SPILLWAY WIDTH
100-YR STORM ELEV.
830.18'
N (IN)
12
THROAT OPENING HEIGHT
SHWT ELEV.
N/A
SEASONAL HIGH WATER TABLE ELEVATION
0 (IN)
6
CONCRETE BASE EXTENSION WIDTH
CLAY LINER
YES
CLAY LINER REQUIRED
P (IN)
12
CONCRETE BASE EXTENSION THICKNESS
UU 1 LL I J I/ 1 /t<L NU 1 LJ:
1. ALL STRUCTURES OVER X-6" IN DEPTH TO BE PROVIDED WITH STEPS 1'-2"
ON CENTERS. STEPS SHALL BE IN ACCORDANCE WITH STANDARD 840.66.
2. LOCATE MANHOLE OVER STEPS.
J. CLASS "A" (3, 000 PSI) CONCRETE TO BE USED.
4. ALL MOTOR JOINTS ARE 1/2" t 1/8".
5. GROUT SHALL BE NON -SHRINK (ASTM-C1107)
6. CONCRETE BLOCK SHALL MEET NCDOT SPECIFICATIONS SECTION 1040-2.
7. BLOCK SHALL BE RED IN COLOR AND SUBSTANTIALLY FREE FROM CHIPS
AND CRACKS
TEMPORARY FAIRCLOTH SKIMMER
DIAMETER & ORIFICE DIAMETER: S
BOTTOM PSS= U
TOP SLAB ELEV. • E
WET POND OUTLET
OPEN -THROAT YARD INLET
z
CONCRETE SLAB
MANHOLE RING AND COVER
#4 BARS 8"O.C. E.
I I I OPEN ON- I I I
�--iFBi}fi1.131--4--♦---4-
RIM ELEV: DPROVIDE TEMPORARY PRE-TREATED
WOOD OR GROUT AS NECESSARYPVC PIPETO BLOCK ORIFICE/WEIR UP CLOW STEM GUIDE
TO ELEV.• T DIAMETER: M �ATTACH TO RISER
SECONDARY SPILLWAY WITH THREADED ROD
INVERT ELEV.: C FILLED WITH GROUT
J
PRIMARY SPILLWAY PRIMARY SPILLWAY
CONTROL ELEV.: B CONTROL ELEV.: B
4"PVC SET TOP AT ELEV: B
PRIMARY SPILLWAY 4"PVC PIPE &
INVERT 4"PVC ELBOW
PRIMARY SPILLWAY QDRILL OPENING IN ENDCAP. DIAMETERQ
CONNECT FLEXIBLE PIPE TO
POND DRAIN. GATE VALVE
SHALL REMAIN OPEN. U-SHAPED STEEL
REMOVE SKIMMER ONCE POND EXTEND TO SLOPE JEMBANKME�
BRACKET ATTACHED
IS NO LONGER UTILIZED AS TO BASE WITH THREADED
TEMPORARY SEDIMENT BASIN. ROD FILLED WITH GROUT
BARREL OUTLET INVERT ELEV.: A6" DIP 0
8'x8_1 24"
DIP DRAIN WITH GATE
VALVE AND HAND WHEEL.
ANCHOR TO OUTLET STRUCTURE.
.....VAVLE TO BE OPEN DURING OUTLET STRUCTURE
EXCAVATE 18" DEEP PIT BELOW CONSTRUCTION. SECTION Y-Y
DIAMETERR
SKIMMER AND PROVIDE 8x24"xl8" #57
WASHED STONE PAD TO KEEP SKIMMER FLANGED, NRS, RESILIENT WEDGE GATE
FROM SETTLING IN MUD VALVE WITH EXTENSION STEM, HAND WHEEL
AND STEM GUIDES AS MANUFACTURED BY
CLOW OR APPROVED EQUAL.
TOP OF EMBANKMENT ELEV.: G
INSTALL SLOPE PROTECTION MATTING
ON ALL SLOPES STEEPER THAN 6:1
AND FLOOR OF POND
OUTLET STRUCTURE TO BE LOCATED
OUTLET 10' MIN. FROM EDGE OF PERMANENT
POOL WATER EDGE.
EMER SPILLWAY CREST ELEV • F
ME- /
#4 REBAR 4" O.C. E. W.
IN EACH OPENI
EMBANKMENT
SLOPE
-/ EMBANKMENT
OUTLET
BARREL: K
VET POND CONSTRUCTION SEQUENCE
1. THE WET DETENTION POND SHALL BE UTILIZED AS A TEMPORARY SEDIMENT BASIN DURING CONSTRUCTION.
1.1. SCHEDULE THE FOLLOWING WORK TO COINCIDE WITH AN EXTENDED FORECAST OF NO PRECIPITATION SUCH THAT ALL WORK CAN BE
COMPLETED DURING A PERIOD OF DRY WEATHER. INSTALL COFFER DAM UPSTREAM OF POND IN CASE OF ANY UNEXPECTED
PRECIPITATION EVENT. UTILIZE MUD PUMP WITH FLOATING SUCTION INLET THROUGH A SEDIMENT FILTER BAG LOCATED DOWNSTREAM OF
BASIN.
1.2. INSTALL POND BARREL, OUTLET STRUCTURE, EMBANKMENT, EMERGENCY SPILLWAY AND OTHER POND COMPONENTS.
1.3. CALL FOR SITE INSPECTION PRIOR TO BACKFILLING POND BARREL.
1.4. INSTALL TEMPORARY SKIMMER ON POND DRAIN. DRAIN VALVE TO REMAIN OPEN.
1.5. EXCAVATE POND TO TEMPORARY SKIMMER BASIN DIMENSIONS, SEE EROSION CONTROL PLAN. USE RECP TO STABILIZE BASIN SIDE SLOPES.
1.6. INSTALL BAFFLES AND OTHER TEMPORARY SKIMMER BASIN COMPONENTS, SEE TEMPORARY SKIMMER BASIN DETAIL.
1.7. SEED ALL DISTURBED AREAS.
2. FOLLOWING COMPLETION OF CONSTRUCTION AND STABILIZATION OF POND DRAINAGE BASIN, PERFORM THE FOLLOWING:
2.1. SCHEDULE THE FOLLOWING WORK TO COINCIDE WITH AN EXTENDED FORECAST OF NO PRECIPITATION SUCH THAT ALL WORK CAN BE
COMPLETED DURING A PERIOD OF DRY WEATHER. INSTALL COFFER DAM UPSTREAM OF POND IN CASE OF ANY UNEXPECTED
PRECIPITATION EVENT. UTILIZE MUD PUMP WITH FLOATING SUCTION INLET THROUGH A SEDIMENT FILTER BAG LOCATED DOWNSTREAM OF
BASIN.
2.2. REMOVE TEMPORARY BAFFLES.
2.3. REMOVE ALL ACCUMULATED SEDIMENT. GRADE POND INTERIOR TO SUBGRADE ELEVATIONS.
2.4. INSTALL CLAY LINER AND ARMORED SECTIONS OF FOREBAY WEIRS.
2.5. IF ADDITIONAL DE -WATERING IS NEEDED BELOW DRAIN/SKIMMER ELEVATION, UTILIZE A MUD PUMP WITH FLOATING SUCTION INLET AND
DISCHARGE REMAINING WATER THROUGH A SEDIMENT FILTER BAG LOCATED OUTSIDE OF THE BASIN. MONITOR PUMPING TO ENSURE FLOW
DOES NOT EXCEED THE CAPACITY OF FILTER BAG.
2.6. INSTALL AND FINE GRADE TOPSOIL TO FINISH GRADES.
2.7. INSTALL TEMPORARY SLOPE LININGS.
2.8. REMOVE TEMPORARY CAP/BLOCKING FROM PRIMARY SPILLWAY.
2.7. INSTALL SHELF PLANTINGS.
2.8. REMOVE TEMPORARY SKIMMER AND CLOSE DRAIN VALVE.
2.9. FILL POND AND MONITOR WATER SURFACE ELEVATION FOR 48 HOURS. WATER SURFACE SHALL REMAIN WITHIN ONE INCH OF
PERMANENT POOL ELEVATION. IF WATER LEVEL DROPS ONE INCH, NOTIFY ARCHITECT AND INVESTIGATE OUTLET BARREL, OUTLET
STRUCTURE AND EMBANKMENT FOR LEAKS OR DEFECTS. MAKE REPAIRS IF REQUIRED AND FILL POND AND REPEAT WATER ELEVATION
MONITORING. IF WATER LEVEL REMAINS WITHIN TOLERANCE, NOTIFY ARCHITECT AND PERFORM DETAILED TOPOGRAPHIC SURVEY.
PROVIDE TEMPORARY PRE-TREATED
WOOD OR GROUT AS NECESSARY
TO BLOCK ORIFICE/WEIR UP
TO ELEV: T
TOP SLAB ELEV: E 1 8 1
WET POND OUTLET
OPEN -THROAT YARD INLET -
Z
RIM ELEV: D
SECONDARY SPILLWAY
INVERT ELEV.: C
PRIMARY SPILLWAY
CONTROL ELEV.: B
�v
PRIMARY SPILLWAY
INVERT
BARREL OUTLET INVERT ELEV.: A 0
OUTLET STRUCTURE
#5 BARS, 12" O.C.E.W.-
CONCRETE SLAB
MANHOLE RING AND COVER
#4 BARS 8 "O. C. E. W.
1211
8 ,. 1 0 ?,
#4 REBAR 4" O.C. E. W.
SLOPN Oy I I I I IN EACH OPENING
--I--+--I--rtFOUR SIDES -+--I--+-- 3"
1 1 1 1 1 1 1 1 1 1
1 r ANCHOR REBAR
1 1 I TO STRUCTURE
IM I
EMERGENCY SPILLWAY
SEED & MULCH EMBANKMENT
SEE SEEDING SCHEDULE
OUTLET STRUCTURE
SECTION X-X
INSTALL SLOPE PROTECTION MATTING
ON ALL SLOPES STEEPER THAN 6:1
RED BLOCK
MASONRY STRUCTURE
DOWELS SHALL BE #4
BARS ® 12" CENTERS
0 �~
PERMANENT BAFFLE
g5.7_WAcHFn STnNF
N CLASS 'B' STONE 22" OUTLET STRUCTURE
1 3
FILTER DIAPHRAGM
jl 3 HEADWALL/FES
4' THICK ON FILTER FABRIC SEE DETAIL THIS
6' SHELF
CHIMNEY
T
-III 1 SEE GRADING PLAN
I,111=III
~� SHEET.
PERMANENT POOL
• _
6:1 COMPACTED
OUTSIDE EDGE OF SHELF= ELEV. W IMPERVIOUS FILL
INSTALL 2-FT
FROM PIPE JOINT U
-III Illi III
1jIII=III=
-- �11=III=
"=III-
ELEV: 8
INSIDE EDGE OF SHELF= ELEV.• X
S
MAIN POOL BARREL OUTLET
- -----------------------------------------
-------------- ----- -----------------------------------------------
1 o 1 POND SEDIME IN STORAGE BOTTOMEPSSEL �V.: A _
BARREL OUTLE INV RCP WITH RUBBER GASKET (ASTM C-443)
ELEV.: A
OUTLET BARREL: K
OUTLET I
8" IMPERVIOUS FILL
LAYER UNDER ALL
WATER SURFACES
MAIN POOL BOTTOM/SEDIMENT
STORAGE TOP = 823.00
EXCAVATE SEDIMENT STORAGE TO
ELEV. = 822.50
WET DETENTION BASIN MAINTENANCE SCHEDULE
DESCRIPTION
METHOD
FREQUENCY
SEASON
EMBANKMENT
INSPECT AND REPAIR
EROSION / ANIMAL NESTINGS
VISUAL
ONCE PER YEAR
ALL
INSPECT AND RESEED
GRASS COVERAGE
VISUAL
WHENEVER NEEDED
ALL
OUTLET STRUCTURE
DEBRIS / OBSTRUCTIONS
BY HAND
WHENEVER NEEDED
ALL
OPERATE POND DRAIN VALVE
BY HAND
ONCE PER YEAR
ALL
EROSION AT OUTLET DISCHARGE
VISUAL
ONCE PER YEAR
ALL
FOREBAY / MAIN POOL
SEDIMENT / DEBRIS
BY HAND
ONCE PER YEAR
ALL
REMOVE TRASH
BY HAND
WHENEVER NEEDED
ALL
CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTENANCE UNTIL SUBSTANTIAL COMPLETION
AT WHICH TIME OWNER WILL ASSUME MAINTENANCE RESPONSIBILITY.
-'----------------------------------------------------------- - - - ---- ---- ELEV.:
4' TOPSOIL UNDER S CRADLE 1 `
ALL WATER SURFACES (FLOWABLE FILL) c='
#57 WASHED STONE
SEE DETAIL THIS SHEET FILTER DIAPHRAGM SEE DETAIL THIS SHEET
NOTE 4' T Y
SEASONAL HIGH WATER TABLE (SHWT) SEE CHART
EMBANKMENT SHALL BE CONSTRUCTED OF CLEAN STRUCTURAL SOIL, FREE OF ROOTS,
VEGETATION, ROCKS & OTHER OBJECTIONABLE MATERIAL. SCARIFY SURFACES BEFORE OUTLET PROTECTION
PLACING FILL_ PLACE FILL IN 6-8 INCH LOOSE LIFTS. COMPACT TO AT LEAST 95Y. OF THE 2-FT DEEP CUT OFF TRENCH. SEE GRADING PLAN.
IMPERVIOUS LAYER TO BE INSTALLED UNDER ALL WATER SURFACES. IMPERVIOUS LAYER
TO CONSIST OF CLAYEY OR SILTY SOIL MIXTURES CAPABLE OF COMPACTING TO A DENSE
STATE WITH AN MAXIMUM PERMEABILITY OF 0.01 IN/HR COMPACTED TO AT LEAST 987' OF
THE MAXIMUM DRY DENSITY PER ASTM D-698. ASTM D 2487 SOIL CLASSIFICATION
GROUPS CH, CL, SC, MH, AND ML; FREE OF ROCK, BRUSH, ROOTS, AND OTHER ORGANIC
MATERIAL SUBJECT TO DECOMPOSITION.
POND AND EMBANKMENT SECTION
AS -BUILT SURVEY REQUIREMENTS
NOTE CONTRACTOR SHALL PROVIDE AS -BUILT TOPOGRAPHIC SURVEY PERFORMED
BY A PROFESSIONAL LAND SURVEYOR CERTIFYING WET POND AREA DIMENSIONS
AND ELEVATIONS OF THE FOLLOWING:
1. OUTLET STRUCTURE TOPS AND INVERTS, ORIFICE/WEIR DIAMETERS, BARREL
PIPE SIZES AND INVERTS AND STRUCTURE HEIGHT & WIDTH DIMENSIONS.
2. EMERGENCY SPILLWAY ELEVATION AND DIMENSIONS.
J. TOPOGRAPHY THAT EXTENDS 20 FEET OUTSIDE LIMITS OF POND WATER
SURFACE AND EMBANKMENT.
4. CONTRACTOR PROVIDE TEST RESULTS OF CLAY LINER.
5. CONTRACTOR TO PROVIDE PHOTOS OF INSTALLATION OF BARREL, OUTLET
STRUCTURE AND EMBANKMENT.
BARREL
12" MIN. _ 11�
#57 WASHED
w STONE WRAPPED
z
CRADLE IN FILTER FABRIC
z (FLOWABLE FILL)
C0
z
N
SECTION S-S
CRADLE (FLOWABLE FILL)
EXCAVATE TRENCH ALONG CENTERLINE
OF EMBANKMENT AND EXTEND INTO
BOTH ABUTMENTS TO AT LEAST THE
ELEVATION OF THE RISER CREST.
SECTION U-U
SPRING LINE #57 WASHED
STONE WRAPPEL
IN FILTER FABRI
T
24
r
EXTEND TO `
DOWNSTREAM
EDGE OF
EMBANKMENT
FILTER DIAPHRAGM
SECTION T- T
#57 WASHED
STONE WRAPPED
IN FILTER FABRIC
Piedmont Leaf Lofts
404 East 4th Street,
Winston-Salem, NC 27101
Phone [phone] Fax [phone]
www.mckissickassociates.com
Consultants:
Consultant Name Civil/Structural/MEP
Seal:
CLH DESIGN, P.A.
400 Regency Forest Drive
Suite 120
Cary, North Carolina 27518
Phone: [phone]
Fax: [phone]
LA: C-106, PE: C-1595
0 .-Essr.N`ry9
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SEA
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I7
ISSUE LOG
Distribution Date No.
REVIEW COMMENTS 11/8/19 1
5th NCDEQ REVIEW 05/28/20
6th NCDEQ REVIEW 06/02/20
Client:
WINSTON-SALEM FORSYTH
COUNTY SCHOOLS
LEWISVILLE MIDDLE
SCHOOL
Drawing Title:
SITE DETAILS
Bid Documents
Issue Date
NOVEMBER 8, 2019
Project Number: Drawn by:
201 7-8 RPI
Drawing Number
C07004
O N
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SCM 1 WET POND/TEMPORARY SEDIMENT BASIN N. T.S