SW6100208_APPROVED PLANS_20100305

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO. I SW
DOC TYPE ❑ CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE1(����
YYYYMMDD

PROPOSED STORMWATER CONTROL PLAN
FOR
TOWNSHIP DEVELOPERS, LLC
PEMBROKE TOWNSHIP
VICINITY MAP
JOHNNY W. NOBLES AND ASSOCIATES
ROBESON COUNTY, N.C.
COVER SHEET
SHEET 1 STORMWATER CONTROL PLAN SHEET
SHEET 2 STORMWATER DETAIL SHEET
SHEET 3 STORMWATER DETAIL SHEET
PROFESSIONAL LAND SURVEYORS
P.O. Box 407
(N S Rp
OF y y
a SEAL 9 ;
029469 =
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LUMBERTON, N.C.

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Approved StormWater Permit Documents
Construction in swcrdance with these documents is
required by t,,a stormwater permit. North Carohra
rules require that the stormwater system designer
inspect doting co! certify ccnfermi;y %:,th
th r , .-. _...r a;:tn the
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OUTLET
STRUCTURE
LEVEL SPREADER
wl CHANNEL-
EMERGENCY OVER
(HARDENED)
OUTLET ABOVE
TEMPORAR'/POOL
160.0' LENGTH
—PERMANENT POOL LEVEL
MID POINT OF VEGETATED SHELF
FOREBAY BERM
10.0' VEGETATED SHELF
SIDE SLOPES= 10:1
— FOREBAY
SIDE SLOPES= 2:1
MAIN POND
3:1 SIDE SLOPE TO BOTTOM
OPTIONAL FLOW PATH
ELONGATED BERMS
FLOW PATH
- VEGETATED
3:1 SIDE SLOPE
BASIC WET DETENTION POND
NOT TO SCALE
160.0' TOP LENGTH
TEMPORARY POOL TOP= 153.50
TOP OF VEGETATED SHELF= 152.50
7--PERMANENT POOL TOP= 152.00
OF VEGETATED SHELF= 151.50
BOTTOM OF POND (SEDIMENT)
CLEAN -OUT TOP ELEVATION= 146.25
M
4.0" Dia. SEDIMENT CLEAN -OUT a
OUTLET ORIFICE BOTTOM ELEVATION=145.25 O
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NOT TO SCALE
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SECTION OF BASIC WET DETENTION POND
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NOT TO SCALE
STORMWATER CONTROL DETAIL SHEET
PROPOSED OFFICE BUILDINGS
FOR
TOWNSHIP DEVELOPERS, LLC
PEMBROKE TOWNSHIP ROBESON COUNTY, N.C.
JOHNNY W. NOBLES AND ASSOCIATES
PROFESSIONAL LAND SURVEYORS
P.O. Box 407 416 CHESTNUT STREET
LUMBERTON, NORTH CAROLINA, 28359
DATE: NOVEMBER, 2009 DRAWN BY: B.M.
SCALE: 1"= 40' CHECKED BY: J.W.N.
REVISED: MARCH 02, 2010
SHEET 2 OF 3

ACCESS ROAD
GEOTEXTI1
i SPILLWAY CREST = 153.50 ( 1 YR./ 24 HR.
ELEV. 152.50 VEGETATED SHELF 10' PERMANENT POOL WSE = 152,00 (LOW FLOW
10
�1
ELEV. 151.50
SEDIMENT FOREBAY RIP —RAP LINED WEI
HARDENED BOTTOM
BOTTOM = 145.25
am
FILTER FABRIC SHALL BE A NON —WOVEN GEOTEXTILE WITH
PROPERTIES EQUAL TO AMOCO 4551 OR MIRAFI 140N. GETEXTILE
CURTAIN SHALL BE SECURELY FASTENED TO PIPE WITH STAINLESS
STILL STRAPS AND HARDWARE. CURTAIN SHALL NOTED OTHERWISE
CURTAIN MAY BE CUT ON TOP SIDE OF PIPE ONLY TO ALLOW
CURTAIN TO BE WRAPPED AROUND PIPE.
GEOTEXTILE CURTAIN
..... ..... ... ".M RISER
PLATE
ANTI —VORTEX PLATE
-„ ,."..d INUM CM RISER
ALUMINUM
COMB, ANTI VORTEX DEVICE
AND TRASH RACK
ALUMINUM COMB. ANTIVORTEX DEVICE AND TRASH RACK
NOT TO SCALE
SLUICE GATE DETAIL
NOT TO SCALE
ALUMINUM
COMB. ANTI VORTEX DEVICE
AND TRASH RACK
SLUICE GATE STEM
4" DIA. ORIFICE
INV
30" CORRUGATED ALUMINUM
PERMANENT POOL (4' AVG. DEPTH)
HARDENED BOTTOM
BOTTOM OF POND ELEV. = 1
INSTALL TEMPORARY SEDIMENT FILTER OF WASHED STONE i6' A
HEIGHT OF 2' OVER THE POND DRAIN. WRAP POND DRAIN WITH
WITH WOVEN FILTER FABRIC AND OPEN VALVE TO DEWATER BASIN.
REPLACE STONE FILTER AS NEEDED TO ENSURE PROPER FILTERING.
SEDIMENT SHALL BE REMOVED FOLLOWING STABILIZATION OF SITE
AND DETENTION POND SHALL BE FINE GRADED TO FINAL CONTOURS.
BASIC WET DETENTION POND
NOT TO SCALE
TOP OF WMBANKMENT ELEV. = 159.00
EMIRS. SPILLWAY ELEV. = 158.00
SUBMERGED SHELF
v
COMPACTED FILL
SEED & MULCH EMBANKMENT
EMERGENCY SPILLWAY
INSTALL SLOPE PROTECTION MATTING
ON SLOPES STEEPER THAN 6:1
"R'.vnvcvcZ�,CY<KKiP4CC%K�.tCitYitY/.ZU.KF GEOTEXTILE CURTAIN —�
30" RISER INBEDED IN ANTI —FLOTATION DEVICE (6") AT 30' OC
1' X 5' DIA. CONC. ANTI —FLOTATION DEVICE
8" CORRUGATED ALUMINUM POND DRAIN W/ SLUICE GATE OUTLET PROTECTION
EMBANKMENT SHALL BE CONSTRUCTED OF CLEAN STRUCTURAL SOIL, FREE OF ROOTS,
VEGETATION, ROCKS AND OTHER OBJECTIONABLE MATERIAL. SCARIFY SURFACES BEFORE
PLACING FILL, PLACE FILL IN 6-8" LOOSE LIFTS. COMPACT TO AT LEAST 95% OF
THE STANDARD PROCTOR DENSITY.
EMBANKMENT SECTION
TOP OF EMBANKMENT
P
8 �I
EMERGENCY SPILLWAY SECTION
(OR TOP OF ACCESS ROAD)
CONSTRUCTION SPECIFICATIONS
1. CLEAR, GRUB AND STRIP THE AREA UNDER THE EMBANKMENT
OF ALL VEGETATION AND ROOT MAT. REMOVE ALL SURFACE
SOIL CONTAINING HIGH AMOUNTS OF ORGANIC MATTER AND
STOCKPILE OR DISPOSE OF IT PROPERLY. HAUL ALL
OBJECTIONABLE MATERIAL TO THE DESIGNATED DISPOSAL
AREA.
2. ENSURE THAT FILL MATERIAL FOR THE EMBANKMENT IS FREE
OF ROOTS, WOODY VEGETATION, ORGANIC MATTER AND
OTHER OBJECTIONABLE MATERiAI. PLACE THE FILL IN LIFTS
NOT TO EXCEED 91NCHES AND MACHINE COMPACT OVER
FILL THE EMBANKMENT 6 INCHES TO ALLOW FOR SETTLEMENT.
3. CONSTRUCT THE OUTLET SECTION IN THE EMBANKMENT.
PROTECT THE CONNECTION BETWEEN TH RIPRAP AND THE
SOIL FROM PIPING BY USING FILTER FABRIC OR A KEYWAY
CUTOFF TRENCH BETWEEN THE RIPRAP STRUCTURE AND THE
SOIL,
4. CLEAR THE POND AREA BELOW THE ELEVATION OF THE CREST
OF THE SPILLWAY TO FACILITATE SEDIMENT CLEANOUT.
S. ALL CUT AND FILL SLOPES SHOULD BE 2: 1 OR FLATTER.
6. ENSURE THAT THE STONE SECTION OF THE EMBANKMENT HAS
A MINIMUM BOTTOM WIDTH OF 3 FEET AND MAXIMUM SIDE
SLOPES OF 1: 1 THAT EXTEND TO THE BOTTOM OF THE SPILLWAY
SECTION.
7. CONSTRUCT THE MINIMUM FINISHED STONE SPILLWAY BOTTOM
WIDTH, AS SHOWN ON THE PLANS, WITH 2:1 SIDE SLOPES
EXTENDING TO THE TOP OF THE OVER FILLED EMBANKMENT.
KEEP THE THICKNESS OF THE SIDES OF THE SPILLWAY OUTLET
STRUCTURE AT A MINIMUM OF 21 INCHES. THE WEIR MUST BE
LEVEL AND CONSTRUCTED TO GRADE TOASSURE DESIGN
CAPACITY,
8. MATERIAL USED IN THE STONE SECTION SHOULD BE A WELL -
GRADED MIXTURE OF STONE WITH A d50 SIZE OF 91NCHES
(CLASS B EROSION CONTROL STONE IS RECOMMENDED)
AND A MAXIMUM STONE SIZE OF 14 INCHES. THE STONE MAY
BE MACHINE PLACED AND THE SMALLER STONES WORKED
INTO THE VOIDS OF THE LARGER STONES. THE STONE SHOULD
BE HARD, ANGULAR AND HIGHLY WEATHER RESISTANT,
ENSURE THAT THE STONE SPILLWAY OUTLET SECTION
EXTENDS DOWNSTREAM PAST THE TOE OF THE EMBANKMENT
UNTIL STABLE CONDITIONS ARE REACHED AND OUTLET
VELOCITY IS ACCEPTABLE FOR THE RECEIVING STREAM, KEEP
THE EDGES OF THE STONE OUTLET SECTION FLUSH WITH THE
SURROUNDING GROUND AND SHAPE THE CENTER TO CONFINE
THE OUTFLOW STREAM.
10. DIRECT EMERGENCY BYPASS TO NATURAL, STABLE AREAS.
LOCATE BYPASS OUTLETS SO THAT FLOW WILL NOT DAMAGE
THE EMBANKMENT.
11. STABILIZE THE EMBANKMENT AND ALL DISTURBED AREAS
ABOVE THE WET DETENTION BASIN AND DOWNSTREAM FROM
THE TRAP IMMEDIATELY AFTER CONSTRUCTION.
12. SHOW THE DISTANCE FROM THE TOP OF THE SPILLWAY TO
THE SEDIMENT CLEANOUT LEVEL (ONE Hall THE DESIGN
DEPTH) ON THE PLANS AND MARK IT IN THE FIELD.
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029469 =
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STORMWATER CONTROL DETAIL SHEET
PROPOSED OFFICE BUILDINGS
FOR
TOWNSHIP DEVELOPERS, LLC
PEMBROKE TOWNSHIP ROBESON COUNTY, N.C.
JOHNNY W. NOBLES AND ASSOCIATES
PROFESSIONAL LAND SURVEYORS
P.O. Box 407 416 CHESTNUT STREET
LUMBERTON, NORTH CAROLINA, 28359
DATE: NOVEMBER, 2009 DRAWN BY: B.M.
SCALE: 1"= 40' CHECKED BY: J.W.N.
REVISED: MARCH 02, 2010
SHEET 3 OF 3

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PROPOSED STORMWATER CONTROL PLAN
TOWNSHIP DEVELOPERS, LLC
PEMBROKE TOWNSHIP
S.R. 1003 CHI�TR_OAD
-PROJECT AREA
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COVER SHEET
SHEET 1 STORMWATER CONTROL PLAN SHEET
SHEET 2 STORMWATER DETAIL SHEET
SHEET 3 STORMWATER DETAIL SHEET
0AAC)
JOHNNY W. NOBLES AND ASSOCIATES
PROFESSIONAL LAND SURVEYORS
P.O. Box 407
LUMBERTON, N.C.

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OUTLET
STRUCTURE
LEVEL SPREADE_R
ovv, CFiANNEL-
EMER(.�ENCY OVERFLOW—J
(HARDENEG)
OUTLET ABOVE
TEMF'JRARY POOL
175.0' LENGTH
—PERMANENT POOL LEVEL
MID POINT OF VEGETATED SHELF
FOREBAY BERM
10.0' VEGETATED SHELF
SIDE SLOPES= 10:1
MAIN
3:1 SIDE SLOPE
OPTIONAL FLOW PATH
ELONGATED BERMS
— FOREBAY
SIDE SLOPES= 2:1
BOTTOM
FLOW PATH
— VEGETATED
3:1 SIDL SLOPE
BASIC WET DETENTION POND
4.0" Dia.
OUTLET ORIFICE
NOT TO SCALE
175.0' TOP LENGTH
TEMPORARY PGOL T OP= 153.50
TOP OF VEGETATED SHELF. 151).50
,--PERMANENT POOL TOP= 152,00
BOTTOM OF VEGETATED SHELF= 151.50
Q�
POND (SEDIMENT) r-
1]OP ELEVATION= 146.25 a C w p
W J-' 0
_ C7wu WN
>NC b0
SEDIMENT CLEAN -OUT ° o
BOTTOM ELEVATION=145.25
J
W
Q
V1
PERMANENT POOL VOLUME
NOT TO SCALE
i/.0 WIVt IVYUt
SEDIMENT CLEANOUT
SECTION OF BASIC WET DETENTION POND
1.0' BERM
GRAVEL OR VEGETATION
SLOPE= 31
HARDENED SURFACE
NOT TO SCALE
STORMWATER CONTROL DETAIL SHEET
PROPOSED OFFICE BUILDINGS
FOR
TOWNSHIP DEVELOPERS, LLC
PEMBROKE TOWNSHIP ROBESON COUNTY, N.C.
JOHNNY W. NOBLES AND ASSOCIATES
PROFESSIONAL LAND SURVEYORS
P.O. Box 407 416 CHESTNUT STREET
LUMBERTON, NORTH CAROLINA, 28359
DATE: NOVEMBER, 2009 DRAWN BY: B.M.
SCALE: 1"=40' CHECKED BY: J.W.N.
REVISED: FEBRUARY, 2010
SHEET 2 OF 3
-
1 .I I'• 1 i , , I •Ji I 1 I , I
..

ACCESS ROAD
ULUI LX I IL
0
4M
152,50
VEGETATED SHELF
10' —
10
—�1
FILTER FABRIC SHALL BE A NON —WOVEN GEOTEXTILE WITH
PROPERTIES EQUAL TO AMOCO 4551 OR MIRAFI 140N. GETEXTILE
CURTAIN SHALL BE SECURELY FASTENED TO PIPE WITH STAINLESS
STILL STRAPS AND HARDWARE. CURTAIN SHALL NOFED OTHERWISE
CURTAIN MAY BE CUT ON TOP SIDE OF FIFE ONLY TO ALLOW
CURTAIN TO BE WRAPPED AROUND PIPE.
GEOTEXTILE CURTAIN
ALUMINUM CM RISER
ANTI -VORTEX PLATE
C
J
ANTI —VORTEX PLATE
JV '+widINUM CM RISER
ALUMINUM
COMB, ANTI VORTEX DEVICE
AND TRASH RACK
ALUMINUM COMB. ANTIVORTEX DEVICE AND TRASH RACK
NOT TO SCALE
m
PERMANENT POOL WSE = 152.00 (LOW FLOW ORIFICE INV
ALUMINUM
COMB. ANTI VORTEX DE
AND TRASH RACK
SLUICE GATE STEM —
4" DIA, ORIFICE
5'
ELEV. 151.50 30" CORRUGATED ALUMINUM
SEDIMENT FOREBAY
RIP —RAP LINED WEI PERMANENT POOL (4' AVG. DEPTH)
HARDENED BOTTOM HARDENED BOTTOM
BOTTOM = 145.25 BOTTOM OF POND ELEV. = 145.25
INSTALL TEMPORARY SEDIMENT FILTER OF WASHED STONE TO A
HEIGHT OF 2' OVER THE POND DRAIN. WRAP POND DRAIN WITH
WITH WOVEN FILTER FABRIC AND OPEN VALVE TO DEWATER BASIN.
REPLACE STONE FILTER AS NEEDED TO ENSURE PROPER FILTERING.
SEDIMENT SHALL BE REMOVED FOLLOWING STABILIZATION OF SITE
AND DETENTION POND SHALL BE FINE GRADED TO FINAL CONTOURS.
BASIC WET DETENTION POND
NOT TO SCALE
ul
Ig
SLUICE GATE DETAIL
NOT TO SCALE
TOP OF WMBANKMENT ELEV. = 159.00
EMIRS, SPILLWAY ELEV, = 158.00
SUBMERGED SHELF
COMPACTED FILL
SEED & MULCH EMBANKMENT
EMERGENCY SPILLWAY
INSTALL SLOPE PROTECTION MATTING
ON SLOPES STEEPER THAN 6:1
GEOTEXTILE CURTAIN
30" RISER INBEDED IN ANTI —FLOTATION DEVICE (6") AT 30' OC
1 X 5' DIA CONC, ANTI —FLOTATION DEVICE
8" CORRUGATED ALUMINUM POND DRAIN W/ SLUICE GATE OUTLET PROTECTION
EMBANKMENT SHALL BE CONSTRUCTED OF CLEAN STRUCTURAL SOIL, FREE OF ROOTS,
VEGETATION, ROCKS AND OTHER OBJECTIONABLE MATERIAL. SCARIFY SURFACES BEFORE
PLACING FILL, PLACE FILL IN 6-8" LOOSE LIFTS. COMPACT TO AT LEAST 95% OF
THE STANDARD PROCTOR DENSITY.
EMBANKMENT SECTION
TOP OF EMBANKMENT
Ia' I
EMERGENCY SPILLWAY SECTION
(OR TOP OF ACCESS ROAD)
CONSTRUCTION SPECIFICATIONS
1. CLEAR, GRUB AND STRIP THE AREA UNDER THE EMBANKMENT
OF ALL VEGETATION AND ROOT MAT. REMOVE ALL SURFACE
SOIL CONTAINING H IGH AMOUNTS OF ORGANIC MATTER AND
STOCKPILE OR DISPOSE OF IT PROPERLY. HAULALL
OBJECTIONABLE MATERIAL TO THE DESIGNATED DISPOSAL
AREA.
2. ENSURE THAT FILL MATERIAL FOR THE EMBANKMENT IS FREE
OF ROOTS, WOODY VEGETATION, ORGANIC MATTER AND
OTHER OBJECTIONABLE MATERIAL. PLACE THE FILL IN LIFTS
NOT TO EXCEED 9 INCHES AND MACHINE COMPACT OVER
FILL THE EMBANKMENT 6 INCHES TOALLOW FOR SETTLEMENT.
3. CONSTRUCT THE OUTLET SECTION IN THE EMBANKMENT.
PROTECT THE CONNECTION BETWEEN TH RIPRAP AND THE
SOIL FROM PIPING BY USING FILTER FABRIC OR A KEYWAY
CUTOFF TRENCH BETWEEN THE RIPRAP STRUCTURE AND THE
SOIL
4. CLEAR THE POND AREA BELOW THE ELEVATION OF THE CREST
OF THE SPILLWAY TO FACILITATE SEDIMENT CLEANOUT.
5. ALL CUT AND FILL SLOPES SHOULD BE 2: 1 OR FLATTER.
6. ENSURE THAT THE STONE SECTION OF THE EMBANKMENT HAS
A MINIMUM BOTTOM WIDTH OF 3 FEETAND MAXIMUM SIDE
SLOPES OF 1: 1 THAT EXTEND TO THE BOTTOM OF THE SPILLWAY
SECTION.
7. CONSTRUCT THE MINIMUM FINISHED STONE SPILLWAY BOTTOM
WIDTH, AS SHOWN ON THE PLANS, WITH 2:1 SIDE SLOPES
EXTENDING TO THE TOP OF THE OVER FILLED EMBANKMENT.
KEEP THE THICKNESS OF THE SIDES OF THE SPILLWAY OUTLET
STRUCTURE AT A MINIMUM OF 21 INCHES. THE WEIR MUST BE
LEVEL AND CONSTRUCTED TO GRADE TO ASSURE DESIGN
CAPACITY.
8. MATERIAL USED IN THE STONE SECTION SHOULD BE A WELL -
GRADED MIXTURE OF STONE WITH A d50 SIZE OF 9 INCHES
(CLASS B EROSION CONTROL STONE IS RECOMMENDED)
AND A MAXIMUM STONE SIZE OF 14INCHES. THE STONE MAY
BE MACHINE PLACED AND THE SMALLER STONES WORKED
INTO THE VOIDS OF THE LARGER STONES. THE STONE SHOULD
BE HARD, ANGULAR AND HIGHLY WEATHER RESISTANT.
ENSURE THAT THE STONE SPILLWAY OUTLET SECTION
EXTENDS DOWNSTREAM PAST THE TOE OF THE EMBANKMENT
UNTIL STABLE CONDITIONS ARE REACHED AND OUTLET
VELOCITY IS ACCEPTABLE FOR THE RECEIVING STREAM, KEEP
THE EDGES OF THE STONE OUTLET SECTION FLUSH WITH THE
SURROUNDING GROUND AND SHAPE THE CENTER TO CONFINE
THE OUTFLOW STREAM.
10. DIRECT EMERGENCY BYPASS TO NATURAL, STABLE AREAS.
LOCATE BYPASS OUTLETS SO THAT FLOW WILL NOT DAMAGE
THE EMBANKMENT.
11. STABILIZE THE EMBANKMENT AND ALL DISTURBED AREAS
ABOVE THE WET DETENTION BASIN AND DOWNSTREAM FROM
THE TRAP IMMEDIATELY AFTER CONSTRUCTION.
12, SHOW THE DISTANCE FROM THE TOP OF THE SPILLWAY TO
THE SEDIMENT CLEANOUT LEVEL (ONE Half THE DESIGN
DEPTH) ON THE PLANS AND MARK IT IN THE FIELD.
STORMWATER CONTROL DETAIL SHEET
PROPOSED OFFICE BUILDINGS
FOR
TOWNSHIP DEVELOPERS, LLC
PEMBROKE TOWNSHIP ROBESON COUNTY, N.C.
JOHNNY W. NOBLES AND ASSOCIATES
PROFESSIONAL LAND SURVEYORS
P.O. Box 407 416 CHESTNUT STREET
LUMBERTON, NORTH CAROLINA, 28359
DATE: NOVEMBER, 2009 DRAWN BY: B.M.
SCALE: 1"= 40' CHECKED BY: J.W.N.
REVISED: FEBRUARY. 2010
I,
i
SHEET 3 OF 3