SW8120511_APPROVED PLANS_20120613

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT
NO.
SW
DOC TYPE
❑CURRENT PERMIT
IAPPROVED PLANS
l
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
69 (�O, I
YYYYMMDD

9.
4fgP
SITE
VICINITY MAP
N.T.S.
SITE DATA
PARCEL NlFMOM'
,»...•..
ZONING+
8-2
TOTAL SITE AREA:
71.968.77 SF / 1.65 AC
LIMIT'S OF OMFURBANCE:
72.206.56 SF / 1.65 AC
DP WAGE AREA:
65.773.00 SF / 1.51 AC
IMPERVXM ARFAS.
NEW CONCREFE:
13.800 SF / 0.32 AC
NEW ASPHALT.
25,103 SF / 0.58 AC
TOTAL IMPERVIOUS AREA:
38.903 SF / 049 AC
S MPERVKKM-
54.06%
x -ISLAND PARK-
-AUTOPARK ASSOCIATES OF WILMINGTON, LLC-
/ BOOK 2408 PAGE 0855
/ MAP BOOK 35 PAGE 294
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30' DRAINAGE EASEMENT
MAP BOOK 51 PAGE 167
-LOT 3-
,ISLAND PARK -
MAP BOOK 51 PAGE 1871NV.=24.00
ry
EXISTING X1 I �1� x'
GRADE I 1 MATCH
27.44t EXISTING
�tirp— GRADE
x I 27.44f
I
X40
25' EMERGENCY SPILLWA�, X
LXIS I iNV 13UILUING
FFE= 29.52
MATCH —airIGRADE
..
1 ISLAND PARK GG�E G
LOT 8 28.50f J
TEMPORARY POOL
ELEV. = 25.20
MAP BOOK 43 PAGE i 01 ,+ )i 1
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25' UTILITY EASEMENT
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(60' EASEMENT)
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OUTLET STRUCTURE
SEE DETAIL
ADJUST CONTOURS AS
NECESSARY TO PROVIDE
COVER OVER OUTLET PIPE
JUNCTION BOX
TOP=GRADE
INV.=24.60f
APPROVED
NORTH, CAROLINA ENVIRONMENTAL
MANAGEMENT COMMISSION
DIVISION OF WATER QUALITY
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LEGEND
PROPERTY LINE
-- — RIGHT OF WAY
DA DA DRAINAGE AREA
LOD LOD LIMITS OF DISTURBANCE ♦ 2023
... > --> .. GRASS SWALE i L L
-- a ° -- DEs JPN PROPOSED CONTOUR Dm
,�- TSF JPN TEMPORARY SILT FENCE DRWN. EDB
fi.45 PROPOSED SPOT ELEVATION DATE 05/01 /12
--�25 EXISTING CONTOUR ossil11111,�. ` N CAR
...... 4
0 25.78 EXISTING SPOT ELEVATION + 2 •.'' s',-
y
-' r;
.. r r
NEW ASPHALT r • (�
......................................... D iOy ••MEIC ;�iyG NE(�t
'1'p ••....• p �.
o J U N 12 2 12
" 4 . 4 v '
b a NEW CONCRETE
NOTE: THERE ARE NO WETLANDS ON THE PROJECT SITE.
SCALE: 1" = 30' C3

�r���. ...._
6" CONCRETE (4,000 PSI MIN.)
64--W2.9 X W2.9 WWM GALVANIZED
- 4" NCDOT ABC STONE
NOTES:
1. CONTROL JOINTS SHALL BE EVERY 15 FT.
(MAX.) AND EXPANSION JOINTS SHALL BE
EVERY 50 FT. (MAX).
2. PAVEMENT SECTION MAY VARY DEPENDING
UPON FIELD CONDITIONS. THE PAVING
CONTRACTOR SHALL COORDINATE WITH
OWNER REPRESENTATIVE AND GEOTECHNICAL
ENGINEER TO DETERMINE ACTUAL PAVEMENT
SECTION.
HEAVY DUTY CONCRETE PAVEMENT SECTION
NTS
15" RCP
INV.=24.65
3" NCDOT 1-2
ASPHALT PAVEMENT
--10" NCDOT ABC STONE
NOTE: PAVEMENT SECTION MAY
VARY DEPENDING UPON
FIELD CONDITIONS.
CONTRACTOR SHALL COORDINATE
w/OWNER & GEOTECHNICAL
ENGINEER TO DETERMINE
ACTUAL PAVEMENT SECTION.
ON SITE HEAVY DUTY ASPHALT PAVEMENT SECTION
NTS
600XMARIFl FABRIC
12" CLASS B RIP RAP ^
EMERGENCY SPILLWAY
TEMPORARY GRAVELLED
CONSTRUCTION ENTRANCE
NTS
■■■■■■■■■■■■
■■■■■■■■NEON
■ENNE■NEEEE■
NNE■E■■ENEE■
■NONEENNE■■■
■NE■■NEE■■■■ .
P LA
26.0'
II`Z�til.�
OUTLET STRUCTURE
NTS
.5.20'
24.65
TEMPORARY/PERMANENT
GRASS SPECIFICATION
1. CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER
ADVERSE SOIL CONDITIONS.
2. RIP THE ENTIRE AREA TO A 6 INCH DEPTH.
3. REMOVE ALL ROCKS. ROOTS AND OTHER OBSTRUCTIONS LEAVING SURFACES
SMOOTH AND UNIFORM.
4. APPLY AGRICULTURAL LIME AND FERTILIZER UNIFORMLY AND MIX WITH SOIL
LIME: 45 IN. PER 1000 S.F.
PHOSPHOROUS: 20 LOS PER 1000 S.F.
FERTILIZER: 17 LBS. PER 1000 S.F.
5. CONTINUE TILLAGE UNTIL A WELL PULVERIZED, FIRM. UNIFORM SEED BED IS
PREPARED 4-6 INCHES DEEP.
6. SEED ON A FRESHLY PREPARED SEED BED AND COVER SEED LIGHTLY.
2 - 3 LBS PER 1000 S.F. (SEE MIXTURE BELOW)
7. MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH.
GRAIN STRAW do HAY AT 75 TO 100 LBS PER 1000 S.F.
WOOD CHIPS AT 500 LOS. PER 1000 S.F.
.LUTE do MESH AS PER MANUFACTURER
S. ASPHALT FOR ANCHORING MULCH SHALL BE TYPE SS-1 EMULSION AND
APPLIED AT A RATE OF 1000 GAL. PER ACRE FOR SLOPE STABILIZATION,
AND 150 GAL. PER TON OF STRAW FOR ANCHORING STRAW.
9. INSPECT ALL SEEDED AREAS AND MAKE NECESSARY REPAIRS OR RESEED
WITHIN THE PLANTING SEASON. IF POSSIBLE. IF GRASS STAND SHOULD BE
OVER 60% DAMAGED. REESTABLISH FOLLOWING ORIGINAL LIME, FERTILIZER
AND SEEDING RATES.
10. CONSULT CONSERVATION INSPECTOR ON MAINTENANCE, TREATMENT, AND
FERTILIZATION AFTER PERMANENT COVER IS ESTABLISHED.
11, SEED FOR TEMPORARY AND PERMANENT APPLICATIONS SHALL BE:
2OX. CARPET GRASS
24% BERMUDA GRASS
20% TURF FESCUE 1OX CREEPING RED FESCUE
24X ANNUAL, RYE GRAIN
*BERMUDA SEED SHALL BE HULLED FOR WARM WEATHER
PLANTING. PURITY OF SEED SHALL BE A MIN. OF 98X AND
GERMINATION SHALL BE A AWN. OF 85X.
ALL DISTURBED AREA SHALL BE SEEDED WITHIN 15 DAYS OF THE COMPLETION OF
GRADING. CONSULT CONSERVATION ENGINEER OR SOIL CONSERVATION SERVICE FOR
ADDITIONAL INFORMATION CONCERNING OTHER ALTERNATIVES FOR VEGETATION OF
DENUDED AREAS. THE ABOVE VEGETATION RATES ARE THOSE WHICH DO WELL
UNDER LOCAL CONDITIONS. OTHER SEEDING SCHEDULES MAY BE POSSIBLE.
NPDES STABILIZATION TIMEFRAMES
ft
SITE AREA DESCRIPTION
STABILIZATION
71MEFRAME EXCEPTIONS
PERIMETER DM. SWALES. DITCHES AND SLOPES 7
7 DAYS
NONE
HIGH QUALITY WATER (HON) ZONES
7 DAYS
NONE
SLOPES STEEPER THAN 3:1
7 DAYS
IF SLOPES ARE 10 OR LESS IN LENGTH AND ARE NOT
STEEPER THAN 2:1 14 DAYS ARE ALLOWED
SLOPES 3:1 OR FLATTER
14 DAYS
7 DAYS FOR SLOPES GREATER THAN 50' IN LENGTH
ALL OTHER AREAS WITH SLOPES FLITTER THAN 4.1
14 MAYS
NONE. EXCEPT FOR PERIMETERS AND HQW ZONES
4.7 '
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TYPICAL GRASS SWALE
N.T.S.
rAHDMRD ° /larar- 4
L
140TES:
1, SYN. FENCE FABRIC SHALL BE MIN. OF 30' tN WtOM WITH
30 L8. jW £ STRENGTH FOR STANDARD FABRIC
A D d0 L.8 FOR VI RA S1RDWK
2. FABRIC SHALL BE 00NUNUOUS UIENGK X JOINTS
ARE NECEM f. LAP FABRIC POSN' 30 POST
3. STEEL POST SMALL BE MN 4' IN HEIGHT AND BE OF THE
SELF -FASTENER STEEL ANGLE TUPE.
TEMPORARY SILT FENCE
NOTE NTS
1. BASIN, FRAME AND GRATE MAY
VARY IN NONESSENTIAL DIMENSIONS.
STEEL POST
WIRE MESH FOR STANDARD FARIO
STANDARD OR EITTRA SIRN7'I M
FILTER FAD=
DIIiECtION OF WATER FLOW
FABRIC SXKr
DEEP a 4' WIDE.
TOP OF BANK
#4 STEEL REBAR JGALV. OR ASPHALT COATED) 26.40
TACKWELDED AT 4 O.C. EACH WAY. LAID
IN OR BOLTED TO TOP OF STRUCTURE 12' class B
1� NCDENR TEMPORARY POOL ELEV.- 25.20 RIP RAP LINED
3 OVER FABRIC
1 /2" OPNG. GALV. OR --/ ELEVT1 O N
ALUMINUM EXPANDED
METAL SCREEN
ATTACH SCREEN WITH
GALV. LAG & WEDGE
ANCHORS
COMPACTED SUBGRADE OR 6"
CRUSHED STONE.
�1
SEDIMENT REMOVAL m 20.0' 2
FOREBAY BOTTOM - 18.0'
5'
04
5'
EROSION CONTROL NOTES AND MAINTENANCE PLAN SITE WORK NOTES:
1. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED FOR 1. THE CONTRACTOR SHALL VISIT THE SITE TO BECOME FAMILIAR WITH FIELD
STABILITY AND OPERATION FOLLOWING EVERY RUNOFF -PRODUCING RAINFALL, BUT CONSTRUCTION CONDITIONS.
IN NO CASE, LESS THAN ONCE EVERY WEEK AND WITHIN 24 HOURS OF EVERY 2. CONTRACTOR SHALL COORDINATE WORK WITHIN NCDOT AND LOCAL RIGHT OF
HALF -INCH RAINFALL. WAYS WITH PROPER AUTHORITIES AND SHALL MEET ANY REQUIREMENTS AS TO
2. ALL POINTS OF EGRESS WILL HAVE CONSTRUCTION ENTRANCES THAT WILL TRAFFIC CONTROL AND CONNECTION TO EXISTING STREETS.
BE PERIODICALLY TOP -DRESSED WITH AN ADDITIONAL 2 INCHES OF #4 STONE 3. CLEARING AND GRUBBING: REMOVE ALL TREES AS REQUIRED UNLESS
TO MAINTAIN PROPER DEPTH. THEY WILL BE MAINTAINED IN A CONDITION TO OTHERWISE NOTED TO REMAIN, STUMPS, ROOTS, SHRUBBERY, ASPHALT,
PREVENT MUD OR SEDIMENT FROM LEAVING THE SITE. IMMEDIATELY REMOVE CONCRETE, STRUCTURES, BURIED UTILITIES, STORAGE TANKS, ETC. WITHIN LIMITS
OBJECTIONABLE MATERIAL SPILLED WASHED OR TRACKED ONTO THE OF CONSTRUCTION.
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CONSTRUCTION ENTRANCE OR ROADWAYS. 4. STRIPPING: BEFORE EXCAVATING OR FILLING, REMOVE ALL TOPSOIL, WOOD,
3. SEDIMENT WILL BE REMOVED FROM HARDWARE CLOTH AND GRAVEL INLET LEAVES, AND ANY OTHER UNSUITABLE MATERIAL.
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PROTECTION, BLOCK AND GRAVEL INLET PROTECTION, ROCK DOUGHNUT INLET 5. MUCKING: REMOVE ANY SOFT, ORGANIC SILT MATERIALS AND EXISTING BURIED
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PROTECTION AND ROCK PIPE INLET PROTECTION WHEN THE DESIGNED STORAGE CONSTRUCTION DEBRIS AS REQUIRED AND FILL TO SUBGRADE ELEVATIONS WITH A
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CAPACITY HAS BEEN HALF FILLED WITH SEDIMENT. ROCK WILL BE CLEANED OR CLEAN SELECT ---FILL COMPACTED AS SPECIFIED.
REPLACED WHEN THE SEDIMENT POOL NO LONGER DRAINS AS DESIGNED. 6. DISPOSAL: CLEARED, GRUBBED, STRIPPED OR EXCAVATED SPOIL SHALL BE
DEBRIS WILL BE REMOVED FROM THE ROCK AND HARDWARE CLOTH TO ALLOW REMOVED FROM SITE AND DISPOSED OF IN ACCORDANCE WITH ALL APPLICABLE
PROPER DRAINAGE. SILT SACKS WILL BE EMPTIED ONCE A WEEK AND AFTER LOCAL AND STATE CODES.
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EVERY RAIN EVENT. SEDIMENT WILL BE REMOVED FROM AROUND BEAVER DAMS, 7. BORROW MATERIAL: THE CONTRACTOR SHALL FURNISH BORROW MATERIAL
DANDY SACKS AND SOCKS ONCE A WEEK AND AFTER EVERY RAIN EVENT. REQUIRED FROM OFF SITE AND OBTAIN ALL REQUIRED PERMITS ASSOCIATED WITH
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4. SEDIMENT WILL BE REMOVED FROM BEHIND THE SEDIMENT FENCE WHEN IT BORROW OPERATIONS.
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BECOMES HALF FILLED. THE SEDIMENT FENCE WILL BE REPAIRED AS NECESSARY 8. FILL AND COMPACTION: AFTER STRIPPING THOSE AREAS DESIGNATED TO
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TO MAINTAIN A BARRIER. STAKES MUST BE STEEL. STAKE SPACING WILL BE 6 RECEIVE FILL SHOULD BE PROOFROLLED. THE TOP 8" OF SUBGRADE SHALL BE
0
FEET MAX. WITH THE USE OF EXTRA STRENGTH FABRIC, WITHOUT WIRE BACKING. COMPACTED TO AT LEAST 98% OF MAXIMUM DENSITY AT OPTIMUM MOISTURE
STAKE SPACING WILL BE 8 FEET MAX. WHEN STANDARD STRENGTH FABRIC AND CONTENT. ANY AREA WHICH PUMPS OR RUTS EXCESSIVELY SHOULD BE
0
WIRE BACKING ARE USED. IF ROCK FILTERS ARE DESIGNED AT LOW POINTS IN UNDERCUT AND REPLACED WITH A CLEAN, SILTY OR CLAYEY SAND HAVING A
THE SEDIMENT FENCE, THE ROCK WILL BE REPAIRED OR REPLACED IF IT UNIFIED SOIL CLASSIFICATION OF SP, SM, OR SC. FILL MATERIAL 5" OUTSIDE OF
BECOMES HALF -FULL OF SEDIMENT, NO LONGER DRAINS AS DESIGNED OR IS BUILDING AREAS SHALL THEN BE PLACED IN LAYERS NOT TO EXCEED 8" AND
DAMAGED. COMPACTED TO AT LEAST 95% OF THE STANDARD PROCTOR MAXIMUM DRY
lim
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SOCK PIPE UNDERDRAIN
NTS
32, I
33' -----i
82'
DENSITY (ASTM D-698) WITH THE UPPER 12 INCHES OF SUBGRADE BEING
COMPACTED TO 98% OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY. FILL
MATERIALS WITHIN BUILDING AREAS TO A LINE OUTSIDE THE BUILDING AREAS
SHALL BE PLACED IN LAYERS NOT TO EXCEED 8" AND COMPACTED TO AT LEAST
NON -WOVEN FILTER FABRIC 98% OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY (ASTM D--698) WITH
LAPPED ON TOP THE UPPER 12 INCHES OF SUBGRADE BEING COMPACTED IN 6 INCH LAYERS TO
100% OF THE STANDARD PROCTOR MAXIMUM DRY DENSITY. IN AREAS WHERE NO
STRUCTURAL FILL IS TO BE PLACED THE UPPER 12 INCHES OF IN -PLACE
SUBGRADE SHOULD BE COMPACTED TO AT LEAST SIB= OF THE STANDARD
PROCTOR MAXIMUM DRY DENSITY. IF THE MATERIAL IS TOO DRY TO COMPACT TO
'ERFORATED PVC SOCK PIPE THE REQUIRED DENSITY EACH LAYER SHALL BE WETTED IN ACCORDANCE WITH
COMPACTION REQUIREMENTS. IF THE MATERIAL IS TOO WET TO SECURE PROPER
COMPACTION, IT SHALL BE HARROWED REPEATEDLY OR OTHERWISE AERATED WITH
SUITABLE EQUIPMENT UNTIL OPTIMUM MOISTURE CONTENT IS OBTAINED. FILL
SHALL BE PLACED IN SUCH A MANNER THAT THE SURFACE WILL DRAIN READILY
AT ALL TIMES. SEE STRUCTURAL NOTES AND SOILS REPORT FOR ADDITIONAL
#57 WASHED STONE REQUIREMENTS.
9. LAYOUT: THE CONTRACTOR SHALL PROVIDE ALL LAYOUT REQUIRED TO
CONSTRUCT HIS WORK -
POND DIMENSIONS Cad NORMAL POOL
NM
TOP VEG. SHELF = 25.1 W
NORMAL POOL = 24.65'
SOT. VEG. SHELF = 24.15'
- SEDIMW REMOVAL = 18.0'
VEGETATED 2:1
SHELF SIDE SLOPE
BELOW
NORMAL
POOL
POND CROSS SECTION
BOTTOM = 1 &0,
NTS
10', 10:1
2:1 VEGETATED
SIDE SLOPE SHEAF
Vd
DETENTION POND NOTES:
1. RESTORE POND TO DESIGN SIZE AND SHAPE UPON COMPLETION OF CONSTRUCTION AND STABILIZATION OF SITE.
2. SEED FOR SLOPES SHALL BE 2OX CARPET GRASS. 24X BERMUDA. 2OX TURF FESCUE. 10X CREEPING RED
FESCUE, AND 24X RYE. SEED AT RATE OF 2-3 #'S PER 1000 SF.
3. THE VEGETATED SHELF SHALL BE PLANTED WITH A COMBINATION OF THREE OF THE FOLLOWING ON 3' CENTERS.
1. PICKERELWEED
2. DUCK POTATO
3. SWAMP ROSE
4. BLUE FLAG
5. CARDINAL FLOWER
10. THE CONTRACTOR IS RESPONSIBLE FOR THE LOCATION AND PROTECTION OF
EXISTING UTILITIES DURING CONSTRUCTION.
11. EXISTING BOUNDARY AND TOPOGRAPHIC INFORMATION FROM SURVEY BY
MIKE UNDERWOOD & ASSOC. AND PROVIDED BY OWNER.
12. THE CONTRACTOR SHALL VERIFY DIMENSIONS AT JOBSITE.
13. THE CONTRACTOR IS RESPONSIBLE FOR THE COORDINATION OF RELOCATION
OR DISCONNECTION OF ALL EXISTING UTILITIES WITH APPLICABLE AGENCIES AND
AUTHORITIES.
14. ALL PAVEMENT AND BASE MATERIALS AND WORKMANSHIP SHALL CONFORM TO
NCDOT STANDARDS.
15, ALL AREAS SHALL BE GRADED FOR POSITIVE DRAINAGE.
16. SEE S&ME REPORT 1061-12-215 DATED MARCH 16, 2012 FOR
ADDITIONAL REQUIREMENTS.
17_ CONTRACTOR SHALL NOTE THAT EARTHWORK QUANTITIES ARE HIS
RESPONSIBILITY. PLANS DO NOT REPRESENT A BALANCED EARTHWORK CONDITION.
18. REINF. CONC. PIPE SHALL BE CLASS III W/RUBBER GASKEfED JOINT OR
"RAM NECK". INSTALL PER MANUFACTURER'S REQUIREMENTS.
TOP OF BANK
1"vent
4" Sctt40 With RED tip Inlet � Aluminum straps
coupling suspending inlet
connection t 2• Pyc float
i 16• z
'`'
1%" Sch 40 SOLID pvc
barrel or •arm•
SUPPLIED BY USER
VA. - . T
Skimmer shown in
floating position
NO inlet extension I W HEAD on
Just the barrel center of inlet and
connected to the Tee orifice
1W hose, es clamps
1W threaded male fitting
on oft end
1. Skimmer can be attached to a straight 4' sch 40 pipe through the darn but the pipe may need
to be anchored to the bottom at the connection so it is secure. Coupling can be removed and
hose attached to outlet using the threaded 1i4 hating. Typical methods used: on a metal
structure a steel stubout welded on the side at the bottom side with a 1 W threaded coupling or
reducers; on a concrete structure with a hole or orifice at the bottom, use a steel plate with a
hole out in it and coupling welled to it thatwill fit over the hole in the concrete and bolted to the
structure with sealant; grout a 4" pvc p€pe in a hole in the concrete to conned the skimmer.
2. Dimensions are approximate, not Wended as plans for construction.
3. Barrel (solid, not foam core pipe) should be 1.4 times fire depth of water with a maximum
length of 6' so the inlet can the pulled to the side for maintenance. Skimmer is made for small
sediment "traps"with a maximum depth of4'.
4. Inlet is 3" pipe between the straps with aluminum screen door for access to the 1 `/" inlet and
orifice Inside.
5. Capacity 1,728 cubic feet per day maximum with 1 W inlet and I1W head. inlet can be
reduced by installing a smaller orifice using the plug and cutter provided to adjust flow rate for
the particular basin volume and drawdown time required.
6. Shipped assembled. User glues inlet extension and barrel, installs vent, cuts orifice in plug
and attaches to outlet pipe or structure. Includes flexible hose, rope, orifice cutter, etc.
1.5rr SKIMMER DETAIL
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12023
DES. JPN
CKD. JPN
DRWN. EDB
3:1
VEGETATED DATE 05/01 / 12
SIDE SLOPE
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