SW4220901_Plan Set (Revised)_20221128

PROPERTY INFORMATION:
PARCEL ID NUMBER: 6726-01-35-5385 M
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ZONING: RA-3 "
ACREAGE: 30.00 Z_ N
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GRAPHIC SCALE PROPERTY OWNER/DEVELOPER: �hti O
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DCA LEXINGTON PROPERTIES, LLC �� U p Of
60 0 30 60 120 240 500 BIESECKER ROAD �° p U
LEXINGTON, NC 27295 y Z
PHONE: N = ^ Q p O
CONTACT: m� g 2 � Q
( IN FEET) email: mA SITE Z C
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ENGINEER: ( w co -6
ALLIED DESIGN, INC. W J O N
4720 KESTER MILL ROAD B/ESECKERRD Z_ w Q
WINSTON-SALEM, N.C. 27103 Z UU) Z co
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PHONE: [phone] A Z w p co 3:
CONTACT: STEVE M. CAUSEY, PE m ,� J Y � aj
email: [e-mail]
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RIM=752.68'
INV IN=744.19'
INV OUT=744.07'@
W H 86° 52' 3 "W 480
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♦ �S87° 05' 30. 95 E 692.132'
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FIRM LICENSE C-1891
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PRE
DEVELOPMENT
PLAN
SHEET
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GRAPHIC SCALE
60 0 30 60 120
( IN FEET )
1 inch = 60 ft.
240
KEY NOTES
OA
NEW PERMANENT WET POND. SEE SWIM 5-7 FOR DETAILS.
®NEW
DITCH SECTION WITH RIP RAP. SEE DETAIL SHEETS
FOR DIMENSIONS.
ONEW
4' HIGH MININUM CHAINLINK FENCE AND SWING GATE.
COORDINATE MATERIAL AND GATE LOCATION WITH OWNER.
O
NEW WOODEN GUARD RAIL. USE 5' LONG 8"X8" PRESSURE
TREATED WOOD POSTS AND 8' LONG 4"X12" PRESSURE
TREATED RAILS. POSTS SHALL HAVE T EXPOSED AND 2'
BURIED IN CONCRETE AND SHALL BE INSTALLED EVERY 8'.
MOUNT RAILS WITH GALVANIZED BOLTS, WASHERS AND
NUTS.
PROPERTY INFORMATION:
PARCEL ID NUMBER: 6726-01-35-5385
ZONING: RA-3
ACREAGE: 30.00
PROPERTY OWNER/DEVELOPER:
DCA LEXINGTON PROPERTIES, LLC
500 BIESECKER ROAD
LEXINGTON, NC 27295
PHONE:
CONTACT:
email:
ENGINEER:
ALLIED DESIGN, INC.
4720 KESTER MILL ROAD
WINSTON-SALEM, N.C. 27103
PHONE: [phone]
CONTACT: STEVE M. CAUSEY, PE
email: [e-mail]
BUA CALCULATIONS
Davidson Charter Academy
WOODS
SQ. FT. ACRE BARB WIRE FENCE
TOTAL SITE AREA: 1,306,800 30.000 (DILAPIDATED) TAX PIN ID: 6726-01-46-1036
- �. �S87' 05' 30.59"E B9�32, ZONING: RA-3
EXISTING BUA ♦ �� - -x _
BUILDING: 0 0.000
PAVEMENTS/GRAVEL: 17,397 0.399
♦ `�`
TOTAL: 17,397 0.399
PERCENT BUA: 1.33%
EXISTING BUA TO BE REMOVED
BUILDING: 0 0.000
PAV E M ENT/G RAVEL: 0 0.000
TOTAL: 0 0.000 CULTIVATED FIELD
(SOYBEANS)
PROPOSED BUA
BUILDING: 63,941 1.468
PAVEMENT/GRAVEL: 203,769 4.678
TOTAL: 267,710 6.146 m
FINAL DEVELOPMENT BUA a GRg11F4
BUILDING: 63,941 1.468 �ORIE ,sSF TaT
PAVEMENT/GRAVEL: 221,166 5.077 ♦ \ °8926AGM6VT wooDs
FUTURE IMPERVIOUS 43,560 1.000 I , � q T�Mp�RgRy qT
TOTAL: 328,667 7.545 °"u °✓ATo tf �s RGCT/oN
PERCENT BUA: 25.15% ° PER' , /V, �ASFi4FiVT
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INV IN (24")=i83.85'
X a INV OUT=783.90'
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POST
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IiI PLAN
I
SHEET
SWM 21
790
- 790
S89° 46' 59.91 W 276.700'
w w

PROVIDE CAST IRON BOOT
TRANSITION FOR ALL DOWNSPOUT
CONNECTIONS TO ROOF LEADERS
ALL DOWNSPOUT AND ROOF DRAINAGE PIPING
SHALL BE SCH 40 PVC FROM DOWNSPOUT TO
STORM DRAINAGE STRUCTURE. UTILIZE TEES,
BENDS, WYES, ETC. AS REQUIRED FOR TIE-INS
AND ROUTING. PROVIDE CLEANOUTS IN
ACCORDANCE WITH NORTH CAROLINA PLUMBING
CODE. REFER TO ARCHITECTURAL/PLUMBING
PLANS FOR EXACT LOCATIONS OF DOWNSPOUTS
AND ROOF LEADERS.
WET POND #1 1,
PROPERTY INFORMATION:
PARCEL ID NUMBER: 6726-01-35-5385
ZONING: RA-3
ACREAGE: 30.00
KEY NOTES
PROPERTY OWNER/DEVELOPER:
OA
NEW BRICK OR CONCRETE CATCH BASIN. NCDOT
DCA LEXINGTON PROPERTIES, LLC
STANDARD 840.01 OR 840.02.
500 BIESECKER ROAD
LEXINGTON, NC 27295
ONEW
BRICK OR CONCRETE CATCH BASIN BUILT OVER
PHONE:
EXISTING LINE. NCDOT STANDARD 840.01 OR 840.02.
CONTACT:
CONTRACTOR SHALL ADJUST GRATE AND FRAME TO
email:
ALIGN WITH NEW CURB LINE.
ENGINEER:
OC
NEW CONCRETE 4 SIDED OPEN THROAT CATCH BASIN.
NCDOT STANDARD 840.04 WITH NCDOT 840.54.
ALLIED DESIGN, INC.
4720 KESTER MILL ROAD
WINSTON-SALEM, N.C. 27103
ODNEW
CONCRETE FLARED END SECTION. NCDOT
PHONE: [phone]
STANDARD 310.01.
CONTACT: STEVE M. CAUSEY, PE
OE
NEW NYLOPLAST 15" DRAIN BASIN (OR EQUIVALENT) WITH
email: [e-mail]
15" STANDARD H-20 RATED DUCTILE IRON GRATE.
CONTRACTOR MAY UTILIZE STANDARD DRAIN BASIN WITH
"ADD -A -BRANCH" AS REQUIRED. \
OF NEW CONCRETE DROP INLET. NCDOT STANDARD 840.14.
YI #501 y\
TOP:785.00 \ ��
INV IN: 778.17 (24")
INV OUT: 778.17 (24") \�
117.95' 24" RCP @ 0.90%.�
125.00' 24" RCP @ 0.90%---
15.25' 24";,,kCP @ 1,02%Yl #502
FES #500 TOP: 185.50
♦ INV OUT: 777.00 (24") INV IN: 779.23 (24") T_#503
♦ INV OUT: 779'23 (24") TOT: 785.5
INV IN: 7$0.35 (18")
INV OUT: 780.35 (24") \
I ♦
205. 3'j8" RCP @ 0. 0%
I
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♦
♦
FES #400
INV OUT: 770.00 (24") FES #300
♦ ' INV OUT: 782.00 (36") O
♦ �117.44' 36" RCP (d) . %-I EX C15
TOP: 792.08
783.90 (36")
♦ 82 1' 24" RCP @
♦
CB #401
TOP: 785.70
INV IN: 771.50 (24")
INV OUT: 771.30 (24")
POND OUTLET STRUCTURE
TOP- 757.80
INV OUT: 753.80 (24")
I
I
145.00' 24" RCP @ 1.52%-
♦ CB #402
TOP: 785.70
FES #600 INV IN: 774.20 (18
INV OUT: 753.00 (24") INV OUT: 773.70 (24")
♦ 64.09' 24" RCP @ 1.25%
7,71
♦ 72.24' 15" RCP @ 3.46% 67.72' 18" RCP @ 1.48%-
♦ YI #201
X-TOP: 762.60 CB #403
i INV OUT: 759.50 (15") TOP: 785.50
INV IN: 775.40 (18")
♦ _ O INV OUT: 775.20 (18")
♦ FES #200
INV OUT: 757.00 (15")
FES #100
♦ INV OUT: 783.30 (15")
65.14' 36" RCP @ 1.46%
0
INV
ODS7 DS DS DS CB #301
TOP: 788.00
INV IN: 783.17 (36")
INV OUT: 782.95 (36"1
DB #409 LL
TOP:787.10
INV IN: 783.60 (15")
INV OUT: 783.40 (15")
6" D,S D S �
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TOP: 786.30 to
INV IN: 782.50 (15") I�
16" DS INV OUT: 782.30 (15")
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98 5' 15" RCP @ 0.91 %- -
/71 If
DI #504
TOP: 787.00
INV IN: 782.20 (18")
INV OUT: 782.20 (18")
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E TOP: 787.35
INV OUT: 784.25 (15")
CB
U- FLOW=791.96'
` INV OUT=784.95'
75.14' 15" RCP @ 0.87%
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253.15' 18" RCP @ 0.90%
CB
INV OUT=789.40'
EX CB
FLOW=791.92'
INV IN (15")=788.32'
INV IN (24")
INV OUT=78":
CB #404 CB #4,,. 1J
TOP: 786.70 TOP: 786.30 0
INV IN: 776.90 (15") INV OUT: 782.30 (15")
82.05 (15")
INV IN: 82.05 (15") OA
INV OUT: 21.49' 15" RCP 1.16% 21.49' 15" RCP @ 1.16%L �
135.34' 8" RCP 92% A CB #405
TOP: 786.70
FES #101 170.97' 15" RCP @ 1.02% INV IN: 782.05 (15") d u
INV OUT: 784.10 (15")_� INV OUT: 778.65 (15'L
80.00' 15" RCP @ 1.01
womowon� M ==on;
\TOP:786.05
INV OUT: 782.95 (15")
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INV=796.51' I
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EX. GAS LINE (ASSUMED LOCATION) 50
BIESECKER ROAD z
SR #1408
VICINITY MAP
NOT TO SCALE
03'
DI (EXISTING) (505) //
TOP:787.03 a///
INV OUT: 784.48 (18")���
DI
GRATE=789.16'
INV IN (4")=787.03' o
INV OUT=786.61' a
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19,
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NO SURFACE WATERS, WETLANDS,
REGULATORY FLOOD ZONES,
PROTECTED VEGETATED SETBACKS,
OR PROTECTED RIPARIAN BUFFERS
ARE LOCATED ON SITE. VERIFIED BY
U.S. FISH AND WILDFIRE SERVICE -
NATIONAL WETLANDS INVENTORY
(SEE NARRATIVE FOR MORE DETAIL).
TFMap1tqRy qT
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SOIL DELINEATION LINE
POST DEV. DRAINAGE AREA
STORMWATER MAINTENANCE
EASEMENT
KEY NOTES
NEW DITCH SECTION WITH RIP RAP. SEE SWM-2 FOR
DIMENSIONS.
PROPERTY INFORMATION:
PARCEL ID NUMBER: 6726-01-35-5385
ZONING: RA-3
ACREAGE: 30.00
PROPERTY OWNER/DEVELOPER:
DCA LEXINGTON PROPERTIES, LLC
500 BIESECKER ROAD
LEXINGTON, NC 27295
PHONE:
CONTACT:
email:
ENGINEER:
ALLIED DESIGN, INC.
4720 KESTER MILL ROAD
WINSTON-SALEM, N.C. 27103
PHONE: [phone]
CONTACT: STEVE M. CAUSEY, PE
email: [e-mail]
CURVE NUMBER CALCULATIONS
POST DEVELOPMENT POI 1
TYPE OF AREA
SOIL GROUP
CN
CN SF
POI TOTAL AREA SF
%POI
%CN
WEIGHTED CN
ONSITE OPEN SPACE FAIR
B
68
606,273
1,139,349.00
53.21%
36.2
77
OFFSITE OPEN SPACE FAIR
B
69
208,378
18.29%
12.6
ONSITE GRAVEL
A
79
1,190
0.10%
0.1
ONSITE GRAVEL
B
85
10,811
0.95%
0.8
OFFSITE GRAVEL
B
85
1,617
0.14%
0.1
ONSITE IMPERVIOUS
A,B,C
98
267,520
23.48%
23.0
FUTURE IMPERVIOUS
A,B,C
98
43,560
3.82%
3.7
IMPERVIOUS AREA
28%
ACRES
26.16
-7
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111111 24o SWM 4
( IN FEET )
1 inch = 60 ft.

EMBANKMENT CONSTRUCTION SHALL BE MONITORED AND COMPACTION TESTED BY
ON -SITE GEOTECHNICAL ENGINEER. ON -SITE SOILS MAY BE SUITABLE FOR POND
BOTTOM AND EMBANKMENT FILLS. THE CONTRACTOR MAY BE REQUIRED TO OBTAIN
SUITABLE SOIL FROM ON -SITE IN AREAS OUTSIDE OF THE POND LIMITS. THE
OWNERS GEOTECHNICAL ENGINEER WILL APPROVE SOILS FOR SUITABLITY OF
POND AND DAM EMBANKMENT CONSTRUCTION. COMPACTED MATERIAL SHALL HAVE
A MAXIMUM PERMEABILITY OF 0.00001 CM/SEC. IF REQUIRED PERMEABILTY LIMITS
CANNOT BE MET WITH ON -SITE SOILS, THE OWNER, ENGINEER AND GEOTECHNICAL
ENGINEER SHALL DETERMINE A SUITABLE METHOD TO MEET PERMEABILITY
REQUIREMENTS. THIS MAY INCLUDE IMPORT OF SOIL MATERIAL FROM OFF -SITE,
AMMENDMENT WITH BENTONITE OR INSTALLATION OF IMPERMEABLE LINERS. THE
CONTRACTORS BASE BID SHALL ASSUME THAT ON -SITE SOILS CAN BE UTILIZED.
IMPORTED MATERIAL, SOIL AMENDMENTS AND IMPERMEABLE LINERS WILL BE
CONSIDERED ADDITIONAL COST.
100 YR. PEAK: 759.41-
1 YR 24 HR PEAK: 758.07-
PROVIDED WQV ELEVATION: 757.80-
REQUIRED WQV ELEVATION: 757.72-
NORMAL POOL: 756.00-
6'VEGETATED SHELF
(6:1 SLOPE)
TOP OF SHELF: 756.25
TOP OF EMBANKMENT 762.00 BOTTOM OF SHELF: 755.75
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FOREBAY
15-20% OF MAIN POOL VOLUME
Summary of Water Quality Management
Management Aspects
Pond 9
Required
Provided
Water Quality Volume (cf)
28,079
29,385
Water Quality Elevation (ft)
757.72
757.8
Water Quality Surface Area (sf)
9,315
13,883
2' TOP WIDTH
EARTHEN FOREBAY
BAFFLE (SIDESLOPES 2:1)
SHWT < ELEV: NOT
REQ'D PER MDC
2.00" 0
DRAWD(
ORIFICE
751.00
EXISTING SOILS TO BE USED FOR POND BOTTOM AND
EMBANKMENT MATERIAL TO HAVE A MAXIMUM
PERMEABILITY OF 0.00001 CM/SEC.
PROVIDE 8" PRE -CAST HOLE IN
OUTLET STRUCTURE FOR SKIMMER
DEVICE. FILL ANNULAR VOIDS
AROUND SKIMMER WITH NON -SHRINK
GROUT. PROVIDE FITTINGS TO
TRANSITION
TO 6" SKIMMER DURING THE EROSION
CONTROL STAGES.
5'x5'
Table 4: Sample Operation and Maintenance Previsions for Wet Ponds
The enilre Split Trash+debris is present
Areas of bare soil and/or
The perimeter of the Met pond
eroslve gullies have formed
The inlet pipe is cloglged if
applicable).
Remove the trashldebris
Reg rade the soil if necessary to t he outlet device
remove the qully, plantground
cover and water until it is
established. Provide lime and
a one-time fertiliser application.
Unclog the pipe. Dispose of
the sediment in a location Floating wetland island (if
where it will not cause impacts applicable)
to streams cr the SCM.
The inlet pipe is cracked or
The inlet device otherwise damaged (if Repair or replace the pipe.
applicable).
Erosion is occurring in the
Swale I;if applicable).
Sediment has accumulated to a
depth greater than the original
design depth for sediment
storage.
The lorebay
Erosion has occurred.
L;'eeds are present.
Regrade the swale if necessary The receiving water
and provide erosion control
devices such as reinforced turf
rnalting or riprap to avoid 'future
erosion problems.
Search for the source of the
sediment and remedy the
problem ii possible. Remove
the sediment and dispose of it
in a location where it will not
cause impacts to streams or
the SCM.
Provide add itionaIerosion
protection such as reinforced
turf mallinq or nprap if needed
to prevent future erosion
problems.
Removehe weeds. preferably
by hand. If pesticide is used,
wipe it on the plants rather than
spraying.
Best professional pracl:ices
Prune according to best
show that pruning is needed to
Professional practices.
maintain optirreal plant health.
Determine the source of the
problem: soils, hydrology,
disease, etc. Remedy the
Plants are dead, diseased or
problem and replace plants.
The vegetated shelf dying.
Provide a one-5m:e fertilizer
application to establish the
ground cover if a soil lest
indicates it isnecessary.
Remove the wA9ds. preferably
Weeds are present.
by hand. If pesticide is used,
wipe it on the plants rather than
sprayinq.
Search for the source of the
sediment and remedy the
Sediment has accumulated to a
problem if possible. Remove
depth greater than the original
the sediment and dfisperse of it
design sediment storage depth.
in a Iocativn where it will not
cause impacts to streams or
the SCM.
The main treatment area
Algal growth covers over 50".sir
Consult a professional to
of the area.
remove and control the algal
growth.
Cattails. phragmiLes or other
Remove the plants by wiping
invasive plants cover 5D% of
them with pesticide (do ndl
the basin surface.
spray).
Shrubs have started to grow on
Remove shrubs immediately.
the embankment.
Evidence of muskrat or beaver
Consult a professional to
The embankman.t activity is present-
remove muskrats or beavers
and repair any holes or erosion.
A tree has staebbd to grow em
Cantul a dam eafaly spelcialist.
the embankment-
to rentiove the tree -
An annual inspection by an
appropriate professicnal shows Make all needed repairs
tha`, the embankment needs immedia'ely.
repa ir.
Clean out the outlet device and
Clogging has occurred. dispose of any sediment in a
location where it will not cause
impacb to ntraama or the SCM
The outlet device is damaged Repair or replace the ou tiet
device.
"Needs or volunteer trees are
Remove the weeds or trees.
growing on the mat.
The anchor cable is damaged.
Restore the anchor cable to its
disconnected or missing.
design slate.
Erosion or other signs of
Repair the damage and
damage have occurred al the
improve the flow dissipation
outlet.
structure
Discharges from the wet pond
are causing erosion or
Contact the local NCDEQ
sedimentation in the receiving
Regional 011ice.
water.
DITCH SCHEDULE (25 YEAR STORM DESIGN)
DAVIDSON CHARTER SCHOOL
DAVIDSON COUNTY, NORTH CAROLINA
August 12, 2022
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RIP RAP
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RIP RAP FOR ACCESS
TO RISER
REST OF WEIR: 757.8
VEGETATED SHELF
RASH RACK
755.75- 756.25
r-T
(6 FT WIDE)
II_III IIIREINFORCED
CONCRETE PIPE
CLASS III (O-RING)
(MIN. 557 LB/FT
UNIT WEIGHT)
INV: 753.80
10,
TOP OF EMBANKMENT
753.
" OUTLET BARREL
LENGTH = 45 LF
SLOPE (@7 1.5%
(SQUARE DIM.) \
ANTI -FLOTATION
(CONCRETE)
REMOVE ORGANIC MATERIAL &
ROOT MAT FROM BENEATH
EMBANKMENT
WET DETENTION BASIN CROSS-SECTION
NOT TO SCALE
PROPERTY INFORMATION:
PARCEL ID NUMBER: 6726-01-35-5385
ZONING: RA-3
ACREAGE: 30.00
PROPERTY OWNER/DEVELOPER:
DCA LEXINGTON PROPERTIES, LLC
500 BIESECKER ROAD
LEXINGTON, NC 27295
PHONE:
CONTACT:
email:
ENGINEER:
ALLIED DESIGN, INC.
4720 KESTER MILL ROAD
WINSTON-SALEM, N.C. 27103
PHONE: [phone]
CONTACT: STEVE M. CAUSEY, PE
email: [e-mail]
VICINITY MAP
NOT TO SCALE
SPECIFICATIONS FOR DETENTION BASIN
1. AREAS UNDER THE EMBANKMENT AND ANY STRUCTURAL WORKS SHALL BE CLEARED, GRUBBED AND STRIPPED OF TOPSOIL, ROOTS OR OTHER
OBJECTIONABLE MATERIAL. UNLESS OTHERWISE NOTED, TO FACILITATE CLEAN OUT AND RESTORATION, THE BASIN AREA WILL BE CLEARED OF ALL BRUSH
AND EXCESS TREES.
2. THE SUITABILITY AND ACCEPTABILITY OF ALL FILL MATERIAL WILL BE DETERMINED BY REGULAR PERIODIC SOIL ANALYSIS AND COMPACTION TEST WHICH
SHALL BE MADE BY THE OWNER'S GEOTECHNICAL ENGINEER. TEST FOR SOIL ANALYSIS, MOISTURE CONTENT, AND COMPACTION ARE TO BE CONDUCTED IN
ACCORDANCE WITH THE LATEST ASTM STANDARDS. COMPACTION SHALL NOT BE LESS THAN 98% OF THE MAXIMUM DENSITY FOR THE GIVEN EMBANKMENT
MATERIAL AS DETERMINED BY THE ASTM D-698 AND NOT ALLOW SEEPAGE THROUGH THE DAM. CONTROLLED FILL FOR EMBANKMENT CONSTRUCTION
SHOULD HAVE AT LEAST 12% FINES BY WEIGHT. SOILS WITH UNIFIED SOIL CLASSIFICATION SYSTEM GROUP SYMBOLS OF SM, SC, AND ML ARE SUITABLE FOR
USE AS CONTROLLED FILL. SOILS WITH USCS GROUP SYMBOL OF CL WHICH MEET THE RESTRICTIONS FOR LIQUID LIMIT AND PLASTICITY INDEX ARE ALSO
SUITABLE FOR USE, UNLESS OTHERWISE INSTRUCTED BY THE GEOTECHNICAL ENGINEER.
3. THE FILL SHALL BE CONSTRUCTED IN 6" LIFTS AND SHALL BE CONTINUOUS OVER THE ENTIRE LENGTH OF THE FILL SO THAT SMOOTH HORIZONTAL
PLANES ARE NOT BUILT INTO THE FILL STRUCTURE. SMOOTH HORIZONTAL PLANES SHALL BE AVOIDED BY SCARIFYING OR THE USE OF SHEEPSFOOT
ROLLERS.
4. THE EMBANKMENT SHALL BE CONSTRUCTED TO A MINIMUM ELEVATION 5% HIGHER THAN THE DESIGN HEIGHT TO ALLOW FOR SETTLEMENT WHEN
MECHANICAL COMPACTORS ARE USED.
5. POND LINER (SODIUM BENTONITE): SPREAD POWDERED BENTONITE (UNMIXED WITH SOIL) AT A RATE OF 1 POUND PER SQUARE FOOT ACROSS THE
BOTTOM OF THE WET POND, UP TO AND INCLUDING ALL OF THE SHELF. COVER BENTONITE WITH 4 INCHES (MIN.) OF TOPSOIL (SHELF) OR 6 INCHES OF
SELECT FILL (SLOPES AND BOTTOM).
6. ALL AREAS OF THE BOTTOM, SIDESLOPES AND EMBANKMENTS OF THE POND SHALL HAVE 4" OF TOPSOIL AND COMPACTED IN A MANNER TO ENSURE
VEGETATIVE GROWTH.
7. IF THE POND IS CONSTRUCTED IN THE SUMMER OR EARLY FALL MONTHS, IT IS ADVISED TO INSTALL SOD ON THE BOTTOM, SIDE SLOPES, AND DAM
EMBANKMENTS TO ENSURE VEGETATIVE COVERAGE AND STABILIZATION. IT IS ADVISED TO INSTALL BMP/SCM PLANTINGS IN THE FALL.
GENERAL SEQUENCE OF MAJOR CONSTRUCTION ACTIVITIES
1. CLEAR ONLY AREAS NECESSARY TO INSTALL EROSION CONTROL MEASURES AND INSTALL ALL MEASURES ACCORDING TO THE APPROVED PLANS.
2. INSTALL CONCRETE RISER AND BARREL STRUCTURE (WITH TEMPORARY SKIMMER ASSEMBLY) IN THE LOCATION AND AT THE ELEVATIONS INDICATED ON
THE DRAWINGS. INSTALL LEVEL SPREADER AT DOWNSTREAM INVERT OF OUTLET BARREL.
3. RESEED/STABILIZE DISTURBED AREAS IMMEDIATELY AFTER FINISHED GRADES HAVE BEEN ACHIEVED. TEMPORARY VEGETATIVE COVER SHALL BE
PROVIDED OVER DISTURBED AREAS WHICH MAY NOT BE AT FINAL GRADE BUT WHICH WILL BE LEFT UNDISTURBED FOR AT LEAST 15 DAYS.
4. BEGIN SITE GRADING AND INSTALLATION OF ON -SITE SWALES AND STORM DRAINAGE PIPING SYSTEM.
5. CONTINUE TO MAINTAIN EROSION CONTROL MEASURES UNTIL VEGETATIVE COVER HAS BEEN ESTABLISHED OVER ALL DISTURBED AREAS AND SITE HAS
BEEN STABILIZED. REMOVE EROSION CONTROL MEASURES ONLY AFTER FINAL INSPECTION AND APPROVAL BY INSPECTOR.
6. VERIFY OR RE-ESTABLISH POND VOLUME BY CLEANING OUT ALL ACCUMULATED SEDIMENT AND DISPOSING OF IT IN AN APPROVED MANNER. PROVIDE
AS -BUILT SURVEY OF POND BOTTOM, TOP AND TOE OF SHELF, OUTLET STRUCTURE, WEIR AND DAM TOP. COORDINATE WITH ENGINEER TO VERIFY POND
VOLUME PRIOR TO PLANTING PERMANENT WET POND LANDSCAPE MATERIALS.
7. ALL DISTURBED AREAS WITHIN THE POND SHALL BE RE -SEEDED AS REQUIRED. AT THIS TIME REMOVE THE TEMPORARY SKIMMER ASSEMBLY AND CLOSE
THE BOTTOM DRAIN IN ORDER TO TRANSITION THE TEMPORARY SEDIMENT BASIN TO THE PERMANENT WET DETENTION POND.
8. INSTALL PERMANENT WET DETENTION POND LANDSCAPING PER THE PLANS AND SPECIFICATIONS DETAILED ON THIS SHEET
SEED AND MAT DAM
EMBANKMENT IMMEDIATELY
AFTER CONSTRUCTION
EARTH DAM TO BE COMPACTED TO 98%
OF THE STANDARD PROCTOR MAXIMUM
DRY DENSITY (ASTM-D698). NO ORGANIC
MATERIAL WITHIN DAM EMBANKMENT
SAND FILTER DIAPHRAGM -
NCDOT 2S SAND
3' - _ CONCRETE
-1IIII -III- / HEADWALL
DIAPHRAGM
753.00
6" SCH. 80
6" SCH. 80 SOLID PVC
PERFORATED PVC
5'Dx5'W CUTOFF TRENCH
ALONG ENTIRE LENGTH OF
DAM EMBANKMENT
NOTES:
1. SEE SCHEDULE FOR DIMENSIONS.
2. INSTALL A FILTER BLANKET OR
FILTER FABRIC BETWEEN THE
RIPRAP AND SOIL FOUNDATION.
3. FILTER FABRIC SHALL BE MIRAFI
500 OR EQUAL.
PLAN
SECTION A -A
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WET POND
DETAIL SHEET
SHEET
SWM 5

NOTE: MEASURE CLEARANCE IN
FABRICATED FRAME TO VERIFY
SIZE PRIOR TO FABRICATING PANELS.
FIELD VERIFY STRUCTURE DIMENSIONS PRIOR TO
FABRICATION. PROVIDE 1/2" CLEARANCE ALL SIDES.
6" I 5'-0" _ I 6"
• • a ad •
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WELD BARS AT
ALL INTERSECTION
POINTS
1/2"x1-1/2"ALUMINUM
FLAT BAR
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WITH LIFT EYE
STAINLESS STEEL WEDGE
ANCHORS. TYP 3 EACH SIDE
PLAN - RISER STRUCTURE NTS
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NOTE: O-RING PIPE SHALL MEET
ASTM C 361 STANDARD SPECIFICATION
FOR REINFORCED CONCRETE LOW -HEAD
PRESSURE PIPE AND ASTM C 76
STANDARD SPECIFICATIONS FOR
REINFORCED CONCRETE CULVERT,
STORM DRAIN, AND SEWER PIPE.
REINFORCEMENT NOT SHOWN FOR CLARITY.
O-RING JOINT PIPE DETAIL NTS
5.0' COLLAR WIDTH
12" COLLAR
1 /f PROJECTION
#5 REBAR
ANCHORS
4.0' COLLA • •
HEIGHT 12"
C i 24" RCP 1 12" COLLAR
61 PROJECTION
if 1 1
PRECAST BASE
SECTION
CONCRETE COLLAR ELEVATION NTS
3000 PSI
CONCRETE
COLLAR
PRECAST
STRUCTURE WALL
+
12"
4" #5 REBAR ANCHORS AT 12" O.C.
AROUND PIPE DIAMETER. DRILL
121"
6" INTO PRECAST STRUCTURE
- WALL AND SET ANCHORS USING
EPDXY GROUT.
GROUT INSIDE
OF STRUCTURE
AROUND PIPE
TO FILL ALL
24" RCP
VOIDS.
BARREL
PRECAST
BASE SECTION
CONCRETE
COLLAR SECTION NTS
FOOTING OUTLINE
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ALUMINUM SHO
FABRICATED
TRASH RACK (WELDED)
SEE NOTES. I
CONCRETE
1/2"x1-1/2"ALUMINUM
FLAT BAR
REMOVEABLE VALVE WRENCH WITH
HAND WHEEL ON TOP. PROVIDE
CHAIN AND LOCK FOR SECURING
WRENCH TO TRASH RACK. 24 TOP OF PRECAST
STRUCTURE
12"x12"ALUMINUM PLATE
WITH LIFT EYE
ALUMINUM SHOP FABRICATED
TRASH RACK (WELDED)
SEE NOTES.
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3"X3"X1/4" ALUM. ANGLE
SIDE AND TOP FRAME
NOTES:
" TRASH RACK SHALL BE SHOP FABRICATED FROM 1/2"x1-1/2" ALUMINUM BARS
• MATERIAL SHALL CONFORM TO ASTM B241 ALLOY 6061T6511
* WELDING ELECTRODE SHALL BE 4043 FILLER METAL, IN ACCORDANCE WITH AWS.
• SECURELY FASTEN TRASH RACK TO CONCRETE STRUCTURE TOP WITH THREE
STAINLESS STEEL WEDGE ANCHORS EACH SIDE.
SECTION B-B NTS
3"x3"x1/4" ALUM. ANGLE
SIDE AND TOP FRAME
PAD
OUTLET STRUCTURE PLAN VIEW NTS
/2"IPALUM. BARS 3" O.C.
=ACH FACE. WELD AT ALL
CONNECTIONS
12"x12" TRASH
GUARD & ORIFICE
PLATE
CLCV/`%I IIJIV VICVV IVIJ
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SECURE STEM
GUIDE BRACKET TO
A __� A
WALL USING
EXPANSION
ANCHORS
VALVE
STEM GUIDE
OPERATING
STEM
EXTENSION STEM
WITH 2" OPERATING
NUT ON TOP
ATTACH STEM TO
OPERATING NUT TO
PREVENT REMOVAL
SECTION A -A
8" RESILIENT WEDGE
GATE VALVE - M.J. ENDS 12
8" DUCTILE
MAX.
IRON PIPE
CAST -IN -PLACE
6"
BASE SECTION
MINIMUM DEPTH
REQ.'D TO INSTALL
ASSEMBLY
PROVIDE SUPPORT
FOR VALVE SEAL PIPE
CONCRETE COLLAR PENETRATION
AROUND PIPE USING RUBBER
BOOT & STAINLESS
STEEL HARDWARE
BOTTOM DRAIN VALVE NTS
FLANGED END PIPE
W/ BAR GRATE
BOLTED
TO FLANGE
CONCRETE
C/L PIPE CRADLE.
EXTEND 6"
OUTLET BELOW
BARREL SAND.
Ir
4' x 4' x 4" SCHEDULE 80 PVC TEE
L----- — —� -- 3'
SOLID 4" SCHEDULE
4" SLOTTED SCHEDULE 80 80 PVC PIPE - DRAIN
PVC CROSS PIPE - CAP TO GRADE
EACH END PLAN VIEW (NTS)
FINISHED GRADE
NCDOT 2S SAND FILTER
2' MIN.
ATTACH ALUM. ANGLE TO
RISER STRUCTURE AND BALLAST
PAD USING EXPANSION ANCHORS
1/2" DIA. x 3" LONG
EXPANSION ANCHOR (TYP)
8" WALL
OPENING
SECTION A -A NTS
BARS 3" O.C.
WELD AT ALL
)NS
12"x12" TRASH
GUARD & ORIFICE
PLATE W/ 2.00" 0
DRAWDOWN
ORIFICE
BOTTOM DRAIN TRASH GUARD NTS
FINISHED
GRADE
FILTER DIAPHRAGM
OUTLET BARREL
CONCRETE PIPE CRADLE,
CONCRETE PIPE CRADLE. EXTEND 6" BELOW SAND.
DRAIN TO GRADE
EXTEND 6" BELOW SAND. 4" SOLID SCHEDULE PVC PIPE - 6" SCHEDULE PVC
N
SECTION VIEW (NTS) SLEEVE THROUGH CRADLE
SECTION ALONG PIPE
ELEV. 760.40 TEMPORARY 2.60' RISER STRUCTURE ELEV. 760.40
12"x12" TRASH
TO BE REMOVED AT CONVERSION OF
GUARD & ORIFICE SEDIMENT BASIN TO WET POND_
PLATE
TEMPORARY 2.60' RISER STRUCTURE �EE THIS SHEET DRAWDOWN
SEE THIS SHEET
-ATO BE REMOVED AT CONVERSION OF I
SEDIMENT BASIN TO WET POND. FOR ALUMINUM I ORIFICE. PLUG ORIFICE UNTIL FOR ALUMINUM
TRASH RACK COMPLETED CONVERSION TRASH RACK
4" SLOTTED SCHEDULE 80 PVC CROSS
PAD FOR PIPE - CAP BOTH ENDS
RISER STRUCTURE
FLANGED END PIPE
W/ BAR GRATE
BOLTED
TO FLANGE
DETAILS FROM SEDIMENT BASIN TO WET I DETAILS
ELEV. 757.80 POND. v ELEV. 757.80
dZ NOTE: 12"X12" TRASH
MINIMUM TOP PRECAST OUTLET STRUCTURE, GUARD & ORIFICE
RISER SECTION INCLUDING CAST IN PLACE BALLAST PAD PLATE W/ 2.00" 0
HEIGHT SHALL SHALL HAVE A MINIMUM WEIGHT OF 39,180 DRAWDOWN
BE 5.00' lbs. (INCLUDING 24" BLOCKOUT, AND 4" ORIFICE. PLUG ORIFICE UNTIL
12"x12" TRASH ORIFICE. CONTRACTOR SHALL SUBMIT COMPLETED CONVERSION
GUARD & ORIFICE SHOP DRAWINGS TO ENGINEER FOR FROM SEDIMENT BASIN TO WET
APPROVAL PRIOR TO ORDERING POND.
PLATE O 2.00" f6 THE STRUCTURE. NORMAL POOL
DRAWDOWN Z-*NORMALPOOL ORIFICE ELEV. 756.00
8" WALL OPENING INVERT SLEEVES FOR REBARB PROVIDE STEPS IN ACCORDANCE ELEV. 755.75 PENETRATIONS BY 6" MIN. WALL
W/ ASTM-478 CO -POLYMER PRE -CASTER THICHNESS 8" WALL
POLYPROPLYENE STEEL 6" MIN. WALL CONCRETE COLLAR OPENING INVERT
REINFORCED STEPS 16" O.C. THICHNESS BY CONTRACTOR 5-0" ELEV. 755.75
5'-0" SOLID PRECAST SEE DETAILS HOLE FOR 8" BOTTOM DRAIN
CONCRETE BOX. 1, 0„ SHALL BE CORE DRILLED
JOINT DESIGN SHALL CONFORM TO WAFFLE STYLE kk
IN THE FIELD BY CONTRACTOR.
ASTM C-478. JOINT SHALL BE BOX NOT ACCEPTABLE. OMIT REINFORCING THIS AREA.
SEALED USING BUTYL RUBBER BLOCK OUT FOR (SEE OFFSET IN PLAN VIEW)
24" RCP
SEALANT CONFORMING TO 24" RCP24" RCP BY
ASTM-990. PARGE JOINTS INV. 753.8 BARREL PRECASTER
INSIDE AND OUT WITH NON- 6' MIN. INV. 751.00 8" DRAIN PIPE &VALVE
SHRINK GROUT. BASE VIBRATE CONCRETE SEE DETAIL
SECTION TO ELIMINATE VOIDS INVERT FLANGED END PIPE
HEIGHT AROUND REBAR (TYP). 753.80 W/ BAR GRATE BOLTED
3000 PSI TO FLANGE
CONCRETE
1'-0" 1'-0" • • • • • = 6" SEDIMENT STORAGE
• • • • • 10' WIDE x 2'-0" DEEP x VIBRATE 3,000 PSI INV. 750.50
o. no 010' LONG FIELD -PLACED CONCRETE "
BALLAST PAD (IN 2 POURS) TO ELIMINATE VOIDS
3" MIN. CLEAR 0/0 0 AROUND REBAR (TYP).
3" MIN. 10' WIDE x 2'-0" DEEP x
(TYP) CLEAR 10' LONG FIELD -PLACED
(TYP) BALLAST PAD (IN 2 POURS)
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ALL LAPS AND STABILIZATION ALL LAPS AND STABILIZATION
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OUTLET STRUCTURE SECTION A -A NTS
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SWM 6

PROPERTY INFORMATION:
KC,
PARCEL ID NUMBER: 6726-01-35-5385
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ACREAGE: 30.00
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The interplay between plants, hydrology, and soil ccampositlOn are vital to the water quality
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function of stormwater wetlands and wet detention basins. Therefore, It is essential that
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selected plant materialsare appropriate for the anticipated conditions. Hydrologic zones
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describe the -degree to which an area is inundated by water. Pliant selection should be
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consistent with anticipated hydrology_ These inundation levels have been divided into four
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1 inch = 10 ft.
zones shown below. The descriptions of these zones in this chapter are meant to depict them
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In only the broadest terms. For specific design guidance and recommended plant species.
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please see the Stormwater Wetland and Wet Detention Basin chapters of this manual_
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Deep Pool - open water and permanent deep pools ranges are best colonized by plants
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with submerged roots. The function of vegetated deep pools areas is to slow flow
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velocities and trap sediment, to absorb nutrients in the water column, improve oxidation
and create habitatfor wildlife and mosquito predators such as frogs, fish, and dragonfly
nymphs during dry times -
Shallow Walter - Shallow Water includes all areas that are inundated by the normal pool
to a depth up to 9 inches- This zone does became drier during periods of drought_
Shallow water zones, such as littoral shelves should be vegetated with emergent plants
and provide some of the best treatment zones in the wetland -
Shallow Land - The shallow land zone is the temporary storage volume portion of a Wet
Pond or Stormwater Wetland. The primary landscaping objectives for this zone are to
stabilize the slopes characteristic of this zone and optimize pollutant removal. Shallow
land zones should be planted with wetland vegetation capable of growing in alternating
dry and inundated conditions_
Upland - This zone extends above the maximum design water surface elevation (never
inundated) and often includes the outermost buffer of a pond or wetland. Plant selections
should be made based on soil condition, slope stability, light, ease of (maintenance, and
function within the landscape because little or no water inundation will occur_
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NCDEQ Stormwater Design Manual a�nry
Plant 'Placement
• The type of vegetation shall be restricted on dams and berms that impound water
either permanently or temporarily during storm events. This restriction does not
apply to cut slopes that form pond banks, only to the top, and front and back
embankment slopes of dams and berms_ Trees or woody shrubs shall not be planters
on water impounding dams and berms. This helps avoid channeling or piping of
impounded water along roots, damage to the integrity of dams and berms should
trees topple, and to enable inspection of the SCM. Only non -clumping turf grasses
shall be planted on water impounding darns and berms. Non -clumping turf grasses
allow for unobstructed visibility of dam and berm slopes for detecting potential) dam
safety problems such as animal burrows, slumping, sink holes, or fractures in the
berm and reduce the risk of erosion on embankments-
• Planting of trees and shrubs should not be located where they would adversely
impact inspection and maintenance access pathways, inlet or outlet pipes, or
manmade drainage structures such as spillways or flow spreaders. Species with
rots that seek water (e.g., willow and poplar), should be avoided within 5+0 feet of
pipes or manmade structures. This also allow for future inspection and
maintenance activities, and to avoid shading of areas intended to be maintained in
grass.
• All landscape material, including grass, should be planted in good topsoil_ Native
underlying soils may be suitable for planting if amended with sufficient quantities of
well -aged compost tilled into the subgrade. Compost used should meet
specifications for Grade A compost quality.
• Soil in which trees or shrubs are planted may need additional enrichment or
additional compost top -dressing depending on the results of soil analysis. Consult
a plant nursery, landscape professional, or arborist. for site -specific
recommendations-
• Evergreen trees and trees which produce relatively little leaf -fall are preferred in
areas draining to a detention device. Leaf litter has the potential to accumulate in
and around outlet devices, which can clog small weirs or orifices.
• Trees should be set back so that branches do not extend over the permanent pool of
a detention device (to prevent leaf -drop into the water and clogging issues)-
• Drought -tolerant species are recommended.
CARDINAL FLOWER
JOE PYE WEED
SWAMP MILKWEED
MARSH HIBISCUS/ROSE MALLOW
VICINITY MAP
NOT TO SCALE
NORMALPOOL
U VEGETATED LITTORAL SHELF DETAIL
GENERALNOTES
1. ALL AREAS OF THE BOTTOM, SIDESLOPES AND EMBANKMENTS OF THE POND SHALL HAVE 4"
OF TOPSOIL AND COMPACTED IN A MANNER TO ENSURE VEGETATIVE GROWTH. AS SOON AS
THE SLOPES ARE CONSTRUCTED, IMMEDIATELY SEED AND STABILIZE WITH STRAW. WITHIN THE
FIRST 90 DAYS, CHECK SLOPES AFTER RAIN EVENTS FOR RUTTING AND SETTLING. STABILIZE AS
NEEDED WITH STABILIZATION MATTING (2-YEAR RATED).
2. IF THE POND IS CONSTRUCTED IN THE SUMMER OR EARLY FALL MONTHS, IT IS ADVISED TO
INSTALL SOD ON THE BOTTOM, SIDE SLOPES, AND DAM EMBANKMENTS TO ENSURE VEGETATIVE
COVERAGE AND STABILIZATION.
3. SHRUBS SHALL NOT BE PLANTED ON FILL EMBANKMENTS THAT IMPOUND WATER, AND SH,
NOT BE PLANTED WITHIN 10 FEET OF ANY STORM DRAINAGE STRUCTURE. A TURF GRASS MIX
WILL BE PROVIDED OVER ALL DISTURBED AREAS IN ACCORDANCE WITH SEEDING
SPECIFICATIONS.
4. POND PLANTS ARE SHOWN SCHEMATICALLY FOR RELATIVE PLACEMENT ABOVE/BELOW THE
MIDPOINT ON THE SHELF. REFER TO "PLANT LIST" CHART (THIS SHEET) FOR QUANTITIES.
DISTRIBUTE THE PLANTS THROUGHOUT, IN GROUPS OF 3 OR MORE.
5. CONTRACTOR TO PROVIDE OWNER WITH A 2-YEAR (MINIMUM) WARRANTY FOR PLANT
MA TE RIAL SURVIVAL/REPLACEMENT. AT THE END OF THE FIRST YEAR AND AGAIN AT THE END
OF THE TWO-YEAR WARRANTY PERIOD, ALL PLANTS THAT DO NOT SURVIVE MUST BE REPLACED.
STAKING MUST BE REMOVED AFTER ESTABLISHMENT (-12 MONTHS) TO PREVENT STRANGLING
OF PLANTS. PLAN FOR MINIMAL USE OF HERBACIDES, FERTILIZERS, PESTICIDES OR SOIL
AMENDMENTS. LANDSCAPE CONTRACTOR SHALL PROVIDE OWNER/ENGINEER WITH 'PLACE OF
ORIGIN' FOR ALL SPECIES, PRIOR TO ORDERING. MATERIAL SHOULD ORIGINATE WITHIN NORTH
CAROLINA, PREFERABLY WITHIN FORSYTH COUNTY OR A NEIGHBORING COUNTY.
MDC 11. VEGETATION.
The following criteria apply to vegetation in and around the wet pond:
(a) The dam structure, including front and back embankment slopes, of the pond shall be
vegetated with non-cllurmping turf grass; trees and woody shrubs shall not be @Ilowed ,
and
(b) The vegetated shelf shall be planted with a minimum of three diverse species of
herbaceous, native vegetation at a minimum density of 50 plants per 200 square feet of
shelf area.
Table 3: Plants for Submerged and Partially Submerged Vegetated Shelves
Asdepias lnramala Swamp Milkweed
Carex teraera Quill sedge
Chelone glabra While Turlleheaid
+
+
+ + +
+ + + +
+ + + +
Eupar6nadaJ^rs dubju&
Dwarl Jooe Pye Weed
+ +
+ + + +
+ + + +
+ + + +
+ + + +
+ + + +
Eupat"ta^s Ii5lubsu-s
Joe Pye Weed
30 JP
+
+ + +
+ + +
+ + + +
Eurlaf&Ad6Jphus rnacdatus
Spotted Irurrpe'tweed
+ + + + + +
+ + + + + +
+ +
+ +
Hibksous ooccoileus
Scadel rose rnallow
+
+ + + + + *
+
++ ++ ++ ++
137CF
Hfbiscus aavr3
a r ea rasema w►�
+ + + + + + + + + +
+ + + + + + + + + +
+ + + + + + + + + + + + +
K aSfefefttlrya virgrrbca
Seashore Mallow
+++ +++++++++++++ +
+ + + + + + + + + + + + + + + + + + + + + + + + + + +
+
tohelra oar�1Oaks
Cardinal flower
+ + + + + + + + + + + + + + +
+ + + + + + + + + + + +
+ + +
Lobelia elangata
Longleaf lobelia
LIJr� 5rPfidfrrfCa
Great Glue Lobelia
WET DETENTION POND 1 PLANT LIST
l-s"hynrhos,pora rokarata
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5tarrush whiletop
SUBMERGED AND PARTIALLY SUBMERGED PLANTS ALLOWED FOR VEGETATIVE SHELVES
(SEE TABLE 3)
695 PLANTS TOTAL
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SIZE AT
SYMBOL
QUANTITY
COMMON NAME
BOTANTICAL NAME
SPACING
SOURCE
PLANTING
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EUPATORIUM FISTULOSUM
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ASCLEPIAS INCARNATA
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MARSH HIBISCUS
HIBISCUS MOSCHEUTOS
PLUG
MARSH FARM
O.C.
CF
247
CARDINAL FLOWER
LOBELIA CARDINALIS
PLUG
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SWM 7