SW6220504_Plansheet SCM-1&2 - SCM Detail_20220926

/'STORMWATER MANAGEMENT NOTES:
1, THE DEVELOPER OR HIS AGENT SHALL CONTACT THE DESF
ENGINEER WHEN THE BEST MANAGEMENT PRACTICE(S) ARE
CONSTRUCTED AND ABOUT TO BECOME OPERATIONAL SO A
FINAL INSPECTION CAN BE PERFORMED TO DETERMINE
COMPLIANCE WITH THE APPROVED PLAN CAN BE PERFORM
2. ANNUAL MAINTENANCE INSPECTION AND REPORT REQUIRED
THE OWNER OF A PERMITTED STRUCTURAL STORMWATER
BMP/CONTROL SHALL ANNUALLY SUBMIT A MAINTENANCE
INSPECTION REPORT FOR EACH BMP TO THE STORMWATER
ADMINISTRATOR. ANNUAL INSPECTIONS SHALL BEGIN WITh
ONE YEAR OF THE RECORDATION OF ANY DEED(S) SHOWN
STORMWATER BMPs/CONTROL STRUCTURES.
J. UPON COMPLETION OF THE PROJECT, AND BEFORE A
CERTIFICATE OF OCCUPANCY SHALL BE GRANTED, THE
ENGINEER OF RECORD SHALL CERTIFY THAT THE COMPLETI
PROJECT IS IN ACCORDANCE WITH THE APPROVED
STORMWATER MANAGEMENT PLANS AND DESIGNS.
4. A FINAL INSPECTION OF THE SITE AND STORMWATER
MANAGEMENT BMP/CONTROLS TO BE SCHEDULED WITH AN,
COMPLETED BY THE PROJECT ENGINEER,
5. NCDEQ AND THEIR ASSIGNS HAVE RIGHT TO ACCESS THE
STORMWATER CONTROL(s) FOR INSPECTIONS OR MAINTENAI
AS NECESSARY,
6. THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE
REQUIRED PRIOR TO THE FINAL PLAT OR CERTIFICATE OF
OCCUPANCY. THE STORMWATER CONTROL IS TO BE
INSPECTED TO ENSURE IT IS FUNCTIONING AS DESIGNED A
HAS FULL DESIGN VOLUME PRIOR TO ISSUANCE OF THE F
CERTIFICATE OF OCCUPANCY.
11, THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING
STORMWATER CONTROLS(s) ACCORDING TO THE APPROVED
MAINTENANCE PLAN AND DIRECTION OF NCDEQ
SEEDBED PREPARATION:
1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL THREE INCHE
CONDITIONS, IF AVAILABLE.
2. RIP THE ENTIRE AREA TO SIX INCHES DEEP.
3. REMOVE ALL LOOSE ROCK, ROOTS AND OTHER OBSTRUCTIONS,
SMOOTH AND UNIFORM.
4. APPLY AGRICULTURAL LIME, FERTILIZER, AND SUPERPHOSPHATE
(SEE SEEDING MIXTURE).
5. CONTINUE TILLAGE UNTIL A WELL —PULVERIZED, FIRM, REASONA
PREPARED FOUR TO SIX INCHES DEEP.
6. SEED ON A FRESHLY PREPARED SEEDBED AND COVER SEED LI
OR CULTIPACK AFTER SEEDING.
7, MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH,
8. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS
PLANTING SEASON, IF POSSIBLE. IF STAND SHOULD BE MORE
RE—ESTABLISH FOLLOWING THE ORIGINAL LIME, FERTILIZER ANI
9. CONSULT S&EC ENVIRONMENTAL ENGINEERS ON MAINTENANCE
AFTER PERMANENT COVER IS ESTABLISHED.
LANDSCAPE NOTES:
ALL LANDSCAPING SHALL BE IN COMPLIANCE WITH THE NCDEQ BMP
LANDSCAPE CONTRACTOR SHALL PROVIDE A TWO—YEAR WARRANTY R
SU RVIVAL/REP LACEM ENT.
AT THE END OF THE FIRST YEAR AND AT THE END OF THE TWO —YE
THAT DO NOT SURVIVE MUST BE REPLACED.
ESTABLISHMENT PROCEDURES, SUCH AS CONTROL OF INVASIVE WEE[
MULCHING, RE —STAKING, WATERING, AND MESH OR TUBE PROTECTIOI
IMPLEMENTED TO THE EXTEND NEEDED TO ENSURE PLANT SURVIVAL.
ESTABLISHMENT (APPROXIMATELY 12 MONTHS), TO PREVENT GIRDLINt
SOD WITHIN BMP AND SURROUNDING AREAS TO BE BERMUDA OR CI
GRASS OR WILDFLOWER SEED MUST BE APPLIED AT THE RATES SPE
ESTABLISHMENT CANNOT BE ACHIEVED WITH SEEDING BY THE TIME C
STORMWATER FACILITY PORTION OF THE PROJECT, THEN THE CONTRI
WILDFLOWER SOD, PLUGS, CONTAINER PLANTS, OR OTHER MEANS TC
AND PROTECT AGAINST EROSION BEFORE WATER IS ALLOWED TO EM
ALL MATERIALS SHALL BE ACQUIRED FROM AN APPROVED NCDEQ PL
BE PURCHASED FROM A LOCAL SOURCE TO ENSURE SURVIVABILITY.
INCLUDE:
— CILL IDE NATIVE PLANT NURSERY 919-662-5566
— GROWING WILD NURSERY 910-259-6361
— NC FOREST SERVICE 919-731-7988
— PLANT DELIGHTS NURSERY 919-772-4794
— TARHEEL NATIVE TREES 919-553-5927
IMMEDIATELY AFTER THE WET DETENTION BASIN IS ESTABLISHED, THE
AND PERIMETER OF THE BASIN SHOULD BE WATERED TWICE WEEKLY
ESTABLISHED (COMMONLY SIX WEEKS)
NO PORTION OF THE WET DETENTION POND SHOULD BE FERTILIZED
THAT IS REQUIRED TO ESTABLISH THE PLANTS ON THE VEGETATED �
LANDSCAPING NOTES:
1. CONTRACTOR SHALL COMPLY WITH ALL APPLICABLE CODES AND
LANDSCAPING,
2. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO ESTABLISH A
ALL SEEDED AREAS.
3. CONTRACTOR SHALL PROVIDE NATURAL TOPSOIL THAT IS FERTILE
SUBSOIL MATERIALS, AND OBTAINED FROM A WELL DRAINED, A
CONTAIN SUBSTANCES WHICH MAY BE HARMFUL TO PLANT GROV
SCREENED AND FREE FROM CLAY, LUMPS, STONES, ROOTS, PLAT
OR MORE IN DIAMETER, DEBRIS, OR OTHER OBJECTS WHICH MIG
PLANTING OPERATIONS. TOPSOIL SHALL CONTAIN AT LEAST 4—f
AND HAVE A PH RANGE OF 5,5 TO 7.0.
4, CONTRACTOR SHALL BE RESPONSIBLE FOR THE WATERING AND T
LANDSCAPED AREAS UNTIL THE LATER OF; (a) THIRTY (30) DAY
THE GRASS AND SHRUBS, OR (b) THE DATE THAT STORE OPEN!
CONTRACTOR SHALL ALSO BE RESPONSIBILITY FOR THE SURVIVAI
MATERIALS DURING THE TWO—YEAR WARRANTY PERIOD AND SHAI
NOT SURVIVE AT THE END OF THE FIRST YEAR AND AT THE EN'
WARRANTY PERIOD.
5. CONTRACTOR TO VERIFY QUANTITIES PRIOR TO COMMENCING WOF
6. ANY DISTURBED AREAS NOT SCHEDULED FOR HARDSCAPE, PLANT
SEEDED LAWN. REFER TO SITE PLAN FOR LOCATION OF AREAS
7. NO PLANT SUBSTITUTIONS ARE PERMITTED WITHOUT WRITTEN APF
REPRESENTATIVE.
8. FOR NEW PLANTING AREAS, REMOVE ALL PAVEMENT, GRAVEL SUI
DEBRIS; REMOVE COMPACTED SOIL AND ADD 18" NEW TOPSOIL,
18" OF EXISTING SOIL TO MEET TOPSOIL/PLANTING MIX STANDAI
9. ADJUST TREE PLANTING LOCATIONS TO AVOID UNDERGROUND UTI
UNDERGROUND UTILITIES (SEWER AND STORM DRAINAGE, GAS, W
LINES.)
STORMWATER MANAGEMENT SYSILM ULIAILS
NOT TO SCALE
WET POND PLAN VIEW
IV ,Ln11 JIVM. 1.I M, LV.VV b1J IVV.JJ 1,r.1 J.OVo l.rJ
1 INCH = 30 FEET 0-YEAR STORM EVENT; 56.79 CFS 19m2 CFS 20,77 CFS
v v �
D 6" PVC
1GH RISER
:TURE
OPERATION & MAINTENANCE
BMP element:
Potentialproblem;
How I will remediaie the problem
The entire SCM
Trash/debris is present
Remove the trash/debris
The perimeter of the wet pond
Areas of bare soil and/or
erosive gullies have formed
Regrade the soil if necessary to
remove the gully: plant ground cover
and water until it is established.
Provide lime and a one—time
fertilizer application
The inlet device
The inlet pipe is clogged
(if applicable)
Unclog the pipe. Dispose of the
sediment in a location where it will
not cause impacts to streams or the
SCM
The inlet is cracked or
Repair or replace the
pipe
otherwise damage (if applicable)
pipe
Erosion is occurring in the
$wale (if applicable)
Regrade the swale if necessary
and provide erosion control devices
such as reinforced turf matting or
riprap to avoid future erosion
problems
The foreboy
Sediment has accumulated to
a depth greater than the
on final design depth for
sediment storage
Search for the source of the
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams
or the SCM
Erosion has occurred
Provide additional erosion protection
such as reinforced turf matting or
riprap if needed io prevent future
erosion problems
Weeds are present
Remove the weeds, preferably, by
hand. If pesticide is used, wipe. It
on the plants rather than spraying
The vegetated shelf
Best professional practices show
that runing is needed to
moinpain optimal plant health
Prune according to best professional
practices
Plants are dead, diseased or
dying
Determine the source of the problem;
soils, hydrology, disease, etc. Remedy
the problem and replace plants,
Provide
a one—time fertilizer
application to establish the ground
cover if a soil test indicates it is
necessary
Weeds are present
Remove the weeds, preferably, by
hand. If pesticide is used, wipe it
on the plants rather than spraying
The main treatment area
Sediment has accumulated to
a depth greater than the original
design sediment storage depth
Search for the source of the
sediment and remedy the problem
if possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the SCM
Algal growth covers over 50%
of the area
Consult a professional to remove and
control the algal growth
Cattails, phrogmites or other
invasive plants cover 50% of
the basin surface
Remove the plants by wipin them
with pesticide (do no sprayl
The embankment
Shrubs have started to grow on
the embankment
Remove shrubs immediately
Evidence of muskrat or beaver
activity is present
Consult a professional to remove
muskrats or beavers and repair any
holes or erosion
A tree has started to grow on
the embankment
Consult a dam safety specialist
to remove the tree
An annual innspection by an
appro riate rofessional shows
that t fie am nkment needs
repair
Make all needed repairs immediately
The outlet device
Clogging has occurred
Clean out the outlet device and
dispose of any sediment in a location
where it will not cause impacts to
dreams or the SCM
The outlet device is damaged
Repair or replace the outlet device
The receiving water
Erosion or other signs of
damage have occurred at the
outlet.
Repair the damage and improve the
flow dissipation structure
Discharges from the wet pond
are, cau i g erosi n or
so imen a�ion in toha receiving
wafter
Contact the local NCDEQ Regaionl
Office
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W A
OWNER/DEVELOPER:
Lee Humphrey
D&L Engineering, PLLC
150 S. Page Street
Southern Pines, NC 28387
910-684-8646 (Off ice)
910-206-1808 (cell)
lee@doubledeng. corn
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Drawn
Checked
Approved
Project No; 048019
Date; January 5, 2022
Title
STORMWATER
CONTROL
MEASURE DETAILS
Sheet No.
SCM-1

'STORMWATER MANAGEMENT NOTES:
1, THE DEVELOPER OR HIS AGENT SHALL CONTACT THE DESIGN
ENGINEER WHEN THE BEST MANAGEMENT PRACTICE(S) ARE
CONSTRUCTED AND ABOUT TO BECOME OPERATIONAL SO A
FINAL INSPECTION CAN BE PERFORMED TO DETERMINE
COMPLIANCE WITH THE APPROVED PLAN CAN BE PERFORMED,
2. ANNUAL MAINTENANCE INSPECTION AND REPORT REQUIRED -
THE OWNER OF A PERMITTED STRUCTURAL STORMWATER
BMP/CONTROL SHALL ANNUALLY SUBMIT A MAINTENANCE AND
INSPECTION REPORT FOR EACH BMP TO THE STORMWATER
ADMINISTRATOR. ANNUAL INSPECTIONS SHALL BEGIN WITHIN
ONE YEAR OF THE RECORDATION OF ANY DEED(S) SHOWING
STOR14WAFER BMPs/CONTROL STRUCTURES.
J. UPON COMPLETION OF THE PROJECT, AND BEFORE A
CERTIFICATE OF OCCUPANCY SHALL BE GRANTED, THE
ENGINEER OF RECORD SHALL CERTIFY THAT THE COMPLETED
PROJECT IS IN ACCORDANCE WITH THE APPROVED
STORMWATER MANAGEMENT PLANS AND DESIGNS.
4, A FINAL INSPECTION OF THE SITE AND STORMWATER
MANAGEMENT BMP/CONTROLS TO BE SCHEDULED WITH AND
COMPLETED BY THE PROJECT ENGINEER.
5. NCDEQ AND THEIR ASSIGNS HAVE RIGHT TO ACCESS THE
STORMWATER CONTROL(s) FOR INSPECTIONS OR MAINTENANCE
AS NECESSARY,
6. THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE
REQUIRED PRIOR TO THE FINAL PLAT OR CERTIFICATE OF
OCCUPANCY. THE STORMWATER CONTROL IS TO BE
INSPECTED TO ENSURE IT IS FUNCTIONING AS DESIGNED AND
HAS FULL DESIGN VOLUME PRIOR TO ISSUANCE OF THE FINAL
CERTIFICATE OF OCCUPANCY.
11, THE PROPERTY OWNER IS RESPONSIBLE FOR MAINTAINING THE
STORMWATER CONTROLS(s) ACCORDING TO THE APPROVED
MAINTENANCE PLAN AND DIRECTION OF NCDEQ
24" RCP WITH WATER TIGHT SEAL
PIPE TO BE BEDDED
PER DIRECTION OF GEOTECHNICAL
ENGINEER 3
1 �/
APPROXIMATE SIZE
EXCAVATE AND BACKFILL
WITH COMPACTED
STRUCTURAL FILL AS
DIRECTED BY GEQTECHNICAL
ENGINEER
204'-24" RCP 0 0.54%
SEEDBED PREPARATION:
1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL THREE INCHES DEEP OVER ADVERSE SOIL
CONDITIONS, IF AVAILABLE.
2. RIP THE ENTIRE AREA TO SIX INCHES DEEP.
3. REMOVE ALL LOOSE ROCK, ROOTS AND OTHER OBSTRUCTIONS, LEAVING SURFACE REASONABLY
SMOOTH AND UNIFORM.
4. APPLY AGRICULTURAL LIME, FERTILIZER, AND SUPERPHOSPHATE UNIFORMLY AND MIX WITH SOIL
(SEE SEEDING MIXTURE).
5. CONTINUE TILLAGE UNTIL A WELL -PULVERIZED, FIRM, REASONABLY UNIFORM SEEDBED IS
PREPARED FOUR TO SIX INCHES DEEP,
6, SEED ON A FRESHLY PREPARED SEEDBED AND COVER SEED LIGHTLY WITH SEEDING EQUIPMENT
OR CULTIPACK AFTER SEEDING.
7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH.
8, INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RE-SEEDINGS WITHIN THE
PLANTING SEASON, IF POSSIBLE. IF STAND SHOULD BE MORE THAN 60% DAMAGED,
RE-ESTABLISH FOLLOWING THE ORIGINAL LIME, FERTILIZER AND SEEDING RATES.
9. CONSULT S&EC ENVIRONMENTAL ENGINEERS ON MAINTENANCE TREATMENT AND FERTILIZATION
AFTER PERMANENT COVER IS ESTABLISHED.
LANDSCAPE NOTES:
ALL LANDSCAPING SHALL BE IN COMPLIANCE WITH THE NCDEQ BMP REQUIREMENTS.
LANDSCAPE CONTRACTOR SHALL PROVIDE A TWO-YEAR WARRANTY FOR BMP PLANTING
SURVIVAL/REPLACEM ENT.
AT THE END OF THE FIRST YEAR AND AT THE END OF THE TWO-YEAR WARRANTY PERIOD, ALL PLANTS
THAT DO NOT SURVIVE MUST BE REPLACED.
ESTABLISHMENT PROCEDURES, SUCH AS CONTROL OF INVASIVE WEEDS, ANIMAL AND VANDAL DAMAGE,
MULCHING, RE -STAKING, WATERING, AND MESH OR TUBE PROTECTION REPLACEMENT, SHALL BE
IMPLEMENTED TO THE EXTEND NEEDED TO ENSURE PLANT SURVIVAL. STAKING MUST BE REMOVED AFTER
ESTABLISHMENT (APPROXIMATELY 12 MONTHS), TO PREVENT GIRDLING (STRANGLING) OF ALL WOODY PLANTS.
SOD WITHIN BMP AND SURROUNDING AREAS TO BE BERMUDA OR CENTIPEDE GRASS.
GRASS OR WILDFLOWER SEED MUST BE APPLIED AT THE RATES SPECIFIED BY THE SUPPLIERS. IF PLANT
ESTABLISHMENT CANNOT BE ACHIEVED WITH SEEDING BY THE TIME OF SUBSTANTIAL COMPLETION OF THE
STORMWATER FACILITY PORTION OF THE PROJECT, THEN THE CONTRACTOR SHALL PLANT THE AREA WITH
WILDFLOWER SOD, PLUGS, CONTAINER PLANTS, OR OTHER MEANS TO COMPLETE THE SPECIFIED PLANTING
AND PROTECT AGAINST EROSION BEFORE WATER IS ALLOWED TO ENTER THE STORMWATER BMP FACILITY.
ALL MATERIALS SHALL BE ACQUIRED FROM AN APPROVED NCDEQ PLANT VENDOR. PLANT MATERIAL SHOULD
BE PURCHASED FROM A LOCAL SOURCE TO ENSURE SURVIVABILITY. LOCAL VENDORS FOR THIS SITE
INCLUDE:
- CILL IDE NATIVE PLANT NURSERY 919-662-5566
- GROWING WILD NURSERY 910-259-6361
- NC FOREST SERVICE 919-731-7988
- PLANT DELIGHTS NURSERY 919-772-4794
- TARHEEL NATIVE TREES 919-553-5927
IMMEDIATELY AFTER THE WET DETENTION BASIN IS ESTABLISHED, THE PLANTS ON THE VEGETATED SHELF
AND PERIMETER OF THE BASIN SHOULD BE WATERED TWICE WEEKLY IF NEEDED UNTIL THE PLANTS BECOME
ESTABLISHED (COMMONLY SIX WEEKS)
NO PORTION OF THE WET DETENTION POND SHOULD BE FERTILIZED AFTER THE FIRST INITIAL FERTILIZATION
THAT IS REQUIRED TO ESTABLISH THE PLANTS ON THE VEGETATED SHELF.
LANDSCAPING NOTES:
1. CONTRACTOR SHALL COMPLY WITH ALL APPLICABLE CODES AND ORDINANCES REGARDING
LANDSCAPING.
2. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO ESTABLISH A HEALTHY STAND OF GRASS ON
ALL SEEDED AREAS.
3. CONTRACTOR SHALL PROVIDE NATURAL TOPSOIL THAT IS FERTILE, FRIABLE, WITHOUT MIXTURE OF
SUBSOIL MATERIALS, AND OBTAINED FROM A WELL DRAINED, AVAILABLE SITE. IT SHALL NOT
CONTAIN SUBSTANCES WHICH MAY BE HARMFUL TO PLANT GROWTH. TOPSOIL SHALL BE
SCREENED AND FREE FROM CLAY, LUMPS, STONES, ROOTS, PLANTS, OR SIMILAR SUBSTANCES I"
OR MORE IN DIAMETER, DEBRIS, OR OTHER OBJECTS WHICH MIGHT BE A HINDERANCE TO
PLANTING OPERATIONS, TOPSOIL SHALL CONTAIN AT LEAST 4-6% ORGANIC MATTER BY WEIGHT
AND HAVE A PH RANGE OF 5.5 TO 7,0.
4. CONTRACTOR SHALL BE RESPONSIBLE FOR THE WATERING AND THE MAINTENANCE OF ALL
LANDSCAPED AREAS UNTIL THE LATER OF; (a) THIRTY (30) DAYS FOLLOWING THE PLANTING OF
THE GRASS AND SHRUBS, OR (b) THE DATE THAT STORE OPENS FOR BUSINESS TO THE PUBLIC.
CONTRACTOR SHALL ALSO BE RESPONSIBILITY FOR THE SURVIVAL OF THE BMP PLANTING
MATERIALS DURING THE TWO-YEAR WARRANTY PERIOD AND SHALL REPLACE ALL PLANTS THAT DO
NOT SURVIVE AT THE END OF THE FIRST YEAR AND AT THE END OF THE SECOND YEAR OF THE
WARRANTY PERIOD.
5. CONTRACTOR TO VERIFY QUANTITIES PRIOR TO COMMENCING WORK.
6. ANY DISTURBED AREAS NOT SCHEDULED FOR HARDSCAPE, PLANTINGS, OR MULCH SHALL BE
SEEDED LAWN. REFER TO SITE PLAN FOR LOCATION OF AREAS TO BE SODDED.
7. NO PLANT SUBSTITUTIONS ARE PERMITTED WITHOUT WRITTEN APPROVAL OF THE OWNERS
REPRESENTATIVE.
8. FOR NEW PLANTING AREAS, REMOVE ALL PAVEMENT, GRAVEL SUB -BASE AND CONSTRUCTION
DEBRIS; REMOVE COMPACTED SOIL AND ADD 18" NEW TOPSOIL, OR TILL AND AMEND THE TOP
18" OF EXISTING SOIL TO MEET TOPSOIL/PLANTING MIX STANDARDS FOR TREES.
9, ADJUST TREE PLANTING LOCATIONS TO AVOID UNDERGROUND UTILITIES. PLANT Is' FROM ALL
UNDERGROUND UTILITIES (SEWER AND STORM DRAINAGE, GAS, WATER, PHONE, AND ELECTRICAL
LINES.)
STORMWATER MANAGEMENT SYSTEM DETAILS
NOT TO SCALE
3' MIN
4' MIN,
EMBANKMEN7 WIDTH
6" TOPSOIL FOR ALL
AREAS ABOVE THE
NORMAL POND ELEVATION
3
TRASH RACK
REFER TO DETAIL
THIS SHEET
STAGE
STORAGE
TABLE
STAGE
ELEVATION
CONTOUR
INCREMENTAL
TOTAL
(FT)
(FT)
AREA (SF)
STORAGE (CF)
STORAGE (Cr)
0.0
255,0
25040
0
0
0.5
255.5
27485
13131
13131
0.9
255.9
26745
11246
24377
1.0
256,0
29065
2891
27268
1.3
256.3
30350
8912
36180 (WQV)
2.0
257.0
32275
21919
58099
3,0
258.0
35075
33675
91774
4.0
259.0
37925
36500
126274
TOP OF EMBANKMENT ELEVATION=259.0
6" TOPSOIL ABOVE
___ - 6" CLAY LINER
- ON LITTORAL SHELF
(
REFER TO DETAIL
FOR INCREMENTAL
WEIR
100 YEAR STORM ELEVATION=258,46
_
'
EMERGENCY WEIR ELEVATION=257.0
6" CLAY SOIL
10 YEAR STORM ELEVATION =256.9 6
LINER ON INSIDE
6.0'x6,0' s
FACE OF
SEEPAGE COLLAR 1
EMBANKMENT
SEE DETAIL �_ _ I ,_
2 YEAR STORM ELEVATION=256.41
INTERMEDIATE WEIR ELEVATION=256,3
---:_'I 6
(_
6FT LITTORA.L � I- � 1
4'x4' PRECAST
CONCRETE RISER C
�
o 1 YEAR STORM ELEVATION=256,30
_
SHELF -
(INSTALL STEPS j
AS NECESSARY) `
:_.__
--1 1-_
INV=255,0
1.0-INCH STORM ELEVATION=255,05
7 NORMAL POND ELEVATION=255.0
1 ELEV=253.0 -
1
4' MIN. ASTM C-923 SEAL BETWEEN
KEY BARREL & RISER. RISER
BASE TO BE FILLED WITH
CONIC, TO INVERT OF BARREL
8"X8"X1"X12" LONG ANGLE (6 TOT. REQUIRED) TO ANCHOR
RISER TO BASE, PROVIDE 2-3/4" A307 BOLTS FROM ANGLE
TO RISER AND 2-A307 "J" HOOKS 3/4" DIA. X 12" LONG
FROM ANGLE TO BASE. ANGLE TO BE FIELD COATED WITH
ZINC RICH PAINT AFTER CONSTRUCTION. "J" HOOKS TO BE
PLACED UNDER LOWER REINFORCING STEEL.
WET POND PLAN VIEW
t PVC ELBOW
SEE DETAIL
I 1-1
CONCRETE SHALL BE I=
PLACED IN RISER "-
AFTER ANGLES ARE
SECURED TO BASE
AND RISER.
I___ 5'x5'xl,5' CONIC. BASE REINFORCE WITH 14 BARS AT 12"
O.C. TOP AND BOTTOM OF EACH DIRECTION PROVIDE 3" MIN.
CLEARANCE BETWEEN EDGE OF CONC. AND STEEL
REINFORCING.
PROFILE OF WET POND DETENTION SYSTEM
SCALE: N.T.S.
CONSTRUCTION SEQUENCE
FOR WET DETENTION POND:
1. INSTALL EROSION CONTROLS.
2. CONSTRUCT DAM BASE AND AREAS BELOW THE
NORMAL POOL. CONSTRUCTION TO BE PERFORMED
UNDER THE INSPECTION OF THE GEOTECHNICAL
ENGINEER. SEED UPON COMPLETION,
3. INSTALL OUTLET PIPE, RIP -RAP APRON AND
STONE FILTER RING,
4. CONSTRUCT OUTLET STRUCTURE.
5. REMOVE ACCUMULATED SEDIMENT AND
SEED UPON COMPLETION,
NOTE: PUMPS SHALL BE USED TO DRAIN
THE POND WHEN NECESSARY, REFER TO DETAIL
THIS SHEET FOR DEWATERING REQUIREMENTS.
BOTTOM OF POND (TOP OF SEDIMENT STORAGE)=251.0
�, (BOTTOM OF SEDIMENT STORAGE)--250,0
6" CLAY SOIL -
LINER
MAIN POOL
EXISTING GRADE=262.Ot
CMFRGeNCy wEip
25y�
I NTFRMF��AT
f Wflp ZSg3
2
1F
TAD Ar CTOWTURE NOT SHOWN FOR CLARITY
TRASH RACK)
OUTLET CONTROL STRUCTURE - INCREMENTAL WEIR
SCALE: N.T.S.
6" TOPSOIL FOR ALL
AREAS ABOVE THE
NORMAL POND ELEVATION
FOREBAY BERM
6" TOPSOIL ABOVE
6" CLAY LINER 3:1
ON LITTORAL SHELF
- 6FT LITTORAL 6:1
SHELF
ON TES:
1, SEE DESIGN PLANS FOR SPECIFIED DIMENSIONS OF RISER,
2. TRASH RACK DIMENSION CRITERIA SPECIFIED IS APPROXIMATE AND VARIES BY MANUFACTURER.
3. INSTALLATION OF TRASH RACK SHALL BE ACCORDING TO MANUFACTURER'S RECOMMENDATIONS.
4. ALL COMPONENTS OF TRASH RACK SHALL BE OF STAINLESS STEEL OR OTHER NON -CORROSIVE
MATERIAL.
S. ALL MOUNTING HARDWARE SHALL BE OF STAINLESS STEEL OR OTHER NON -CORROSIVE
MATERIAL,
GRAPHIC SCALE
i0 0 15 30
1 INCH = 30 FEET
TRASH RACK
CORROSIVE MATERIAL / \
5.5" SPACING ! , \ 5.5"
5.5"
NOT
TRA H RACK SHALL BE INSPECTED
PERIODICALLY AND ANY DEBRIS ON
THE TRASH RACK IS TO BE REMOVED
AND PROPERLY DISPOSED OF.
TRASH RACK DETAIL
SCALE: N.T.S.
CONCRETE SEEPAGE COLLAR
SCALE: N.T.S.
5.5"
RISER
#4 REBAR 0 12" OC
IN FRONT & REAR FACE
OF COLLAR. REBAR TO
HAVE 3" MIN. CONC. COVER
FROM EDGE OR FACE OF COLLAR
5' MIN. GRASS FOREBAY
WEIR AT ELEV=254.0
FOREBAY TOP ELEV=256.0
WIDTH AT TOP=2.0 FT
RISER STRUCTURE
4" PVC SCREW CAP
FOR CLEANING ACCESS
12" MIN.
EXTEN
THRO
STRU
4"x4" PVC TEE
PERM. POND ELEV.=255.0
12" MIN.
22"DIA. HOLE DRILLED
INTO BOTTOM CAP
PVC DRAIN OUTLET
NOTE: PUMPS SHALL BE USED TO DRAIN
SEDIMENT STORAGE TOP THE FOREBAY WHEN NECESSARY. REFER TO DETAIL
FOREBAY BOTTOM THIS SHEET FOR DEWATERING REQUIREMENTS.
ELEV=253.0
NORMAL POND ELEVATION '41M
BOTTOM OF SEDIMENT - v
STORAGE/EXIT
ELEV=252.5
FOREBAY ENTRANCE SHALL BE
DEEPER THAN FOREBAY EXIT
SHALLOW LAND ZONE
HERBACEOUS PLANTS
1
6
TYPICAL LITTORAL SHELF VEGETATION DETAIL
SCALE: N,T.S,
SCIENTIFIC NAME COMMON NAME PLANTING ZONE QUANTITY NURSERY CONTAINER TYPE
`- 6" TOPSOIL FOR ALL
AREAS ABOVE THE
NORMAL POND ELEVATION
BOTTOM OF SEDIMENT
STORAGE/ENTRANCE
ELEV=252.0
SHALLOW WATER ZONE
HERBACEOUS PLANTS
POND
(NORMAL POOL)
SPACING PLANTING SEASON
Joncus effusus
Soft Rush
SHALLOW WATER
149
PEAT POT
6' O.C.
SPRING/SUMMER
Iris vlrginica
Blue Flag Iris
SHALLOW WATER
149
PEAT POT
6' O.C.
SPRING/SUMMER
Schoenoplectus tobernaemontani
Soft Stem Bulrush
SHALLOW WATER
149
PEAT POT
6' O.C.
SPRING/SUMMER
Eupatoriodelphus maculatus
Spotted Trumpetweed
SHALLOW LAND
149
PEAT POT
6' O.C.
SPRING/SUMMER
Eupatorium purpureum
Joe-Pye Weed
SHALLOW LAND
149
PEAT POT
6' O.C.
SPRING/SUMMER
Rhynchospora colorato
Starrush Whitetop
SHALLOW LAND
149
PEAT POT
6' O.C.
SPRING/SUMMER
NOTES:
1. ALL CONCRETE TO BE 3000 PSI
NON -FLY ASH.
2. APPLY I" THICK WRAP OF ASPHALTIC
CEMENT AROUND DISCHARGE PIPE 6"
BEYOND PLANNED SEEPAGE COLLAR ON
BOTH SIDES.
3. APPLY ADDITIONAL ASPHALTIC CEMENT
AT PIPE/SEEPAGE COLLAR INTERFACE
ON UPSTREAM FACES,
4, TO BE FIELD INSPECTED BY
GEOTECHNICAL ENGINEER, ASPHALTIC
CEMENT TO MEET OR EXCEED FEDERAL
SPECIFICATION 55-153 TYPE 1:
ASTM-D-2822-75 TYPE 1,
TYPICAL LITTORAL SHELF PLANTING SCHEDULE
D 4" PVC
UGH RISER
CTURE
OPERATION & MAINTENANCE
BMP element:
Potentialproblem:
How I will remediate the problem
The entire SCM
Trash/debris is present
Remove the trash/debris
The perimeter of the wet pond
Areas of bare soil and/or
erosive gullies have formed
Regrade the soil if necessary to
remove the gully, plant ground cover
and water until it is established,
Provide time and a one-time
fertilizer application
The inlet device
The inlet pipe is clogged
(if applicable)
Unclog the pipe, Dispose of the
sediment in a location where it will
not cause Impacts to streams or the
SCM
The inlet pipe is cracked or
otherwise damage (if applicable)
Repair or replace the pipe
Erosion is occurring in the
swale (if applicable)
Regrade the swale if necessary
and provide erosion control devices
such as reinforced turf malting or
riprap to avoid future erosion
problems
The foreboy
Sediment has accumulated to
a depth greater than the
on final design depth for
sediment storage
Search for the source of the
sediment and remedy the problem if
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams
or the SCM
Erosion has occurred
Provide additional erosion protection
such as reinforced turf maiting or
riprap if needed io prevent future
erosion problems
Weeds are present
Remove the weeds, preferably by
hand. If pesticide is used, wipe. it
on the plants rather than spraying
The vegetated shelf
Best professional practices show
that pruning is needed to
main Pain optimal plant health
Prune according to best professional
practices
Plants are dead, diseased or
dying
Determine the source of the problem:
soils, hydrology, disease, etc, Remedy
the problem and replace plants,
Provide a one-time fertilizer
application to establish the ground
cover if a soil test indicates it is
necessary
Weeds are present
Remove the weeds, preferably, by
hand. If pesticide is used, wipe it
on the plants rather than spraying
The main treatment area
Sediment has accumulated to
a depth greater than the ongqfinal
design sediment storage depth
Search for the source of the
sediment and remedy the problem
if possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the SCM
Algal growth covers over 50%
of the area
Consult a professional to remove and
control the algal growth
Cattails, phrogmites or other
invasive plants cover 50% of
the basin surface
Remove the plants by wipin them
with pesticide (do no spray}p
The embankment
Shrubs have started to grow on
the embankment
Remove shrubs immediately
Evidence of muskrat or beaver
activity is present
Consult a professional to remove
muskrats or beavers and repair any
holes or erosion
A tree has started to grow on
the embankment
Consult a dam safety specialist
to remove the tree
An annual innspection by on
Make all needed repairs immediately
appro riate professional shows
that tie embankment needs
repair
The outlet device
Clogging has occurred
Clean out the outlet device and
dispose of any sediment in a location
where it will not cause impacts to
streams or the SCM
The outlet device is damaged
Repair or replace the outlet device
The receiving water
Erosion or other signs of
damage have occurred at the
outlet.
Repair the damage and improve the
flow dissipation structure
Discharges from the wet pond
are, cau i g erosion or
seamen a�ion In the receiving
wa or
Contact the local NCDEQ Regatonl
Office
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OWNER/DEVELOPER:
Lee Humphrey
D&L Engineering, PLLC
150 S. Page Street
Southern Pines, NC 28387
910-684-8646 (Office)
910-206-1808 (cell)
lee@doubledeng. corn
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Drawn
Checked
Approved
Project No: 048019
Dais: January 5, 2022
Title
STORMWATER
CONTROL
MEASURE DETAILS
Sheet No,
SCM o2
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