SW8960617_APPROVED PLANS_19960829

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW oq��FJ(o l
DOC TYPE
CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE-
YYYYMMDD

INV. 31.7
q
VEGETATIVE SHELF--_
6:1 SLOPE
41'-
PERMANENT POOL 34 7
m 33.0' MSL
STORAGE POOL
m 34.0 MSL -
FLOOD POOL
0 34.5 MSL --_�
BOTTOM
® 28.5 MSL ---�_
4 V4
4 3
4-
W.E. KANIPE
CY`
430/838
OD -
L/40
5 M
a
44'
PROPOSED
4" SCH 80 PVC
INV. IN 33.0
INV. OUT 32.8
(SEE DETAIL) \
ASPHALT OR
CONCRETE SPILLWAY
0 34.0' MSL
EXISTING DITCH
NOTE:
RE-GRAD#NG OF EXIST NG ROADSIDE
DITCH WILL BE REQUIRED. RE -SEED
WITH BERMUDA GRASS.
67
0111,1
Im
36
CATCH BASIN
TOP 34.6
INV. 32.r5
SD-1
CATCH BASIN
TOP 35.6
INV. 33.0
3� =r
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CL
2.64 ACRES
AREA BY COORDINATE METHOD
,;OHN T�ORPE
796/198
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PINE ACRES SUBDIVISION
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• AMAPBOOK 13. PAGE 18
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CONSTRUCTION
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TEMPORARYENTRANCE
SILT FENCE
J
AS NEEDED
S 09°57'14'E STORMWATER PROJECT BOUNDARY
. A. ;- !
600.03'
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EXISTING BUILDING
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(UNDER CONSTRUCTION)
FINISH FLOOR ELEVATION= 47 32'
80'
COVERED WALKWAY
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TEMPORARY
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STORMWATER
PROJECT BOUNDARY
599.92'
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- 44 '=
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BENCHMARK: /
TOP OF EXISTING IRON REBAR
j
INLAND DRIVE
ELEVATION = 4459' MSL
BO R/W
1
1
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Il_ 44 <-
I
0 15 30
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60
Sam -
SCALE: 1 ''=30'
WAYLON JOHNSON
LEGEND
S.R. 13?6
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Pro eSi
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17
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BEACH 0 CGe°n
VICINITY MAP
Scale: 1 Inch = 1-1/2 Mile
25 EXISTING GRADE
25 PROPOSED GRADE
PROPOSED CULVERT
W}TH CATCH BASIN
°.3 EXISTING- SPOT ELEVATION
3D.3
r - - -PROPOSED SPOT ELEVATION
STORMWATER DATA TABLE
TOTAL SITE AREA = 2.64 AC.
TOTAL ALLOWABLE IMPERVIOUS
AREA @80% = 2.11 AC.
COUP, TED RI✓NOFF FROM 1'' RAINFALL = 8,358 CF
NORMAL POOL SURFACE AREA = 7394 SF
STORAGE POOL SURFACE AREA = 8721 SF
ELEVATION OF 4" PIPE INLET = 33.0' MSL
APPROX:MATE DRAWDCWN TJAE = 2.9 GAYS
10 YEAR PEAK FLOW = 13.1 CFS
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D E C E f V E
36
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36
AUG0 71996
D E M
PRQJ # `i(i?0(
FLOOD POOL 0 34.5' MSL
FLOOD POOL 0 34.5' MSL
STORAGE POOL �
PROPOSED f STORAGE POOL
33
'm 54.0' MSL
33
GRADE �03,D'MSL
33
PERMANENT POOL
0 33.0' MSL VEGEiATIVF SIfL�
MANENT POOL
0 33.0' MSL
33.'° MSL
FINAL DRAWING
6:1 SLOPEOPE
x
NOT RELEASED FOR CONSTRUCTION
O Q
3a
30
4" SCH 80 PVC
INV. IN = 33.0' MSL
30'
.30
T
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BOTTOM
0 8.5' MSL
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27
CROSS SECTION C-C
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CROSS SECTION B-B
(STORMWATER OUTLET SECTION)
SEAL , f ?� J6
SCALE: 1 "= 30' HORIZONTAL
1 "= 3' VERTICAL
SCALE- 1"=30' HORIZONTAL
1 "=3' VERTICAL
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96-0093

A. "Y THE TOP END OF THE JUTE STRIPS IN A
TRENCH 4 INCHES OR MORE IN DEPTH.
S. TAMP THE TRENCH FULL OF SOILO WITH ROW OF STAPi �C,
.�s
4 INCHES DOWN FROM TRENCH.
yea.
C. OVERLAP BMY UPPER END OF LOWER E. OVERF4LL
STRIP AS IN 'A' AND *8'. OVERLAP END
OF TOP STRIP 4 INCHES AND STAPLE.
.+:
�"• r.:� •i�$: -I • s. sr •:� t r s ,ram
.; L -fir" r. ; Sr- • f} rs';:,•.;}••
TAMPED.0. EROSION STOP - FOLD OF JUTE BURIED IN
SLIT TRENCH AND
DOLMLE ROW OF TO 6 FEET APART AS
s:try '�••r�?r�yS
�r �. :,tip-`,••' rS{r'��tr'•`3•Z',':PLACE STAPLES 1,5
REQUIRED TO KEEP
THE JUTE
.Y • `Y.Y.ti .. • A `S•. • ::� •:'. far r y :
.{ ltitirw :` • MILY
S•::•4' :'•.•i %'''s1: i•�•��'• k • OSOIL-
16
`� '•yS�;�r��s�.-''fit' •.•.�`'z�r s>� •
TYPICAL STAPLES
6 GAUGE WIRE
�rrti{a• •L' fir:?.
r: rr5sr-•:fi - ,•.ram.•..
r:r--
F. PRESS ENDS OF JUTE 4 INCHES INTO THE SOIL
AROUNO STRUCTURES AND STALPLE SECURELY.
MA I tt c ST"11=TION
RQAQ5ME SF&M
WHERE APPLICABLE
Jute thatching shall be used In roadside Swale where the slope exceeds 0,015 (1.5%)
SPECIFICATION GUIDE
A Preparing a channel and seeding:. To -meat meeandcgag- slope channel to center to confine low !lows :o
the channel where thatching will be laid
L Fertilization - Ume and fertilize as specified In "Grassing Schedule". Disk as needed but do not
culL:l ack
2 Vegetative Sprigging - Plant grass sprigs or similar material before the thatching is put down.
-Spacings for planting may vary. Suggested maximum Is 10 x 20 inches.
a Seedtngs - Split the application. Sow half the seed before placing the thatching. Plant the remaining
half after the thatching is laid,
Ek Laying the Thatching The thatching shall be laid on loose soil after all rocks. clods and sticks have been
picked up that would prevent contact with the soil surface.
L Stan laying the thatching from the top of the channel and unroll down grade so that one edge of the
strip eoincldes with the channel center. Lay a second strip parallel to the first on the other aide of the
channel and allow a 2 Inch overlap. If one roll of thatching does not extend the length of the char.-nel.
continue downhill with additional rolls.
2 Securing the Thatching - Bury the top end of the jute strip In a trench 4 inches or more deep. Tamp the
trench full of soil. Reinforce with a raw of staples driven through the jute about 10 inches apart. Then
staple the overlap in the channel center. These staples should be 3 to 4 feet apart. The outside edges
may be stapled similarly at anv time after the center has been stapled. Closer stapling along the sides
is required where concentrated water may flaw into the channel.
Where one roll of thatching ends and another roll begins. the end of the top strip overlaps the trench
where the upper end of the lower strip Is buried. Make the overlap at least 4 Inches and staple securely.
3 Erosion Stops - At any point the thatching may be folded for burying in slit trenches and secured as
were the upper ends. This checks water flow and erosion that may begin under the matting. It also
jives improved tie -down. The procedure is recommended on steeper slopes and gentler slopes of
sandy soil or arras subject to seepage. Spacings of stops vary from 25 to I0o feet.
4 Diversions - Where diversion terraces outlet into the waterway, the outlet should be protected with
thatching used in the same manner as in the main channel. The thatching for the outlet Is laid first so
that thatching In the main channel will overlap the outlet strip.
5 Thatching - Soil Contact - Get contact between thatching and soil by roWng at right angle after laying.
stapling and seeding is complete. Perfect contact It -vital to keep water flow over not under the
-
thatching. -
6 Staples - Hairpin -shaped wire staples, number 8 gauge; 8 and 10 inches long have been used. The
longer staples are used in kfoae or wet soil. Wire staples are better than wooden pegs because the
staples can be driven flush with the matting. Wooden pegs extend above the thatching and may catch
trash that diverts water Row out of the thatch protected channel. Wooden pegs may also set up a
damaging turbulence.
C. Inspection: After Job completion. make sure the thatching Is in contact with the soil at all places and the
critical areas are Xcurcly stapird down.
EXTRA STRENGTH ;50 //I IN. MIN.) SYNTHETIC aOROILIS
C FA6AIC Of NYLON, POLfESTEA. Off ETHYLENE YARNS.
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PLAN VIEW
SECTION A -A
TYPICAL CATCH BASIN PROTECTION
NTS
I 1,12- X 4- REDUCER
1
4 X 4 TREAT
MIN. 41 IN C
(TYP
rEO LUMBER
YP.)
:N. so PVC
4" PIPE INLET AND SUPPORT DETAIL
NTS
NOTES:
i. VtGOROIl3 STAND OF PERMANENT GRASS COVER SHALL BE
ESTABLISHED AS SOON AS POSSIBLE ALONG THE CENTER
LINE AND BANKS OF CHANNEL.
2 WHERE SLOPE OF CHANNEL BOTTOM EXCEEDS i.Sly. JUTE
THATCHING, OR OTHER EFFECTIVE CHANNEL LIMNG
MATERAL, SHALL BE USED TO PROTECT CHANNEL CENTER
LINE AND BANKS. (SEE INSTALLATION OF ,LUTE THATCHING
IN ROAD SIDE SWALES.")
1 MAX
*`Vegetative Filtet­at pond spilluav shall
have a side slope of 2::.
TYPICAL VEGETATIVE SWALE
NTS
��\• .:
\\� \ . • • • • . .
EXIS IN6
rR E)MAX ABC
-Ala L 1rM%7 ROADMA"
6` HIM.
PLAN VIEW
BEC77ON VIEW
DA WIDTH OF
. . . . . I PgOP'$ED STREET.
�WHICHEvEa Is
GREATER
NEW CONSTRUCTION
CONSTRUCTION ENTRANCE DETAIL
PM
41M.
S ME am m e ; -- - -- r STEEL OR W000 POST
Iz• sraT
r-- WOVEN MIRE FENCING AS REW RD.
iSEE MOTE / 6.)
,r--SILT FENCE FABRIC
` f �
01111. 12 92 GA.
INTERMEDIATE I =� I FILL SLOPE
WIRE
i I �
i • v � GRADE i MIN. COMPACTED FILL OVER SKIR7a
Atoo•IDR SfiIRT MiTH MIN 4' LOMC
_ao WIRE STAPLES f 12- D.C.
OR REPAIR OF SILT FENCE FAILURES,
f° 175E 057 WASHED STONE IN LIEU OF
COMPACTED FILL.
FRONT VIEW SIDE VIEW
L Eratall silt fancy a shown 00 rawhng Wd at locations nocessm, to Control siltation of adiactla areas.
L Mar•1 +say OWU are 40a0. they wall Ie a SIAIM of 3' in tiaseter ale 6' in huge!+. Pasts shall 6e Crsosota or
Wtachlore al tented &MthWR e11+1.
1 NW" steel eon" are %*K tiny shall sw i• 1n INWN am to of the salt fasten• angle type.
l Ww" win fohci►4, +Mee re•dr10 bay fats p ol, shill coefere to ASTM At16 for clan 3 gelraniting. Fabric shall
110
a sUji of 32• wide Asa le" a vial" of 6 line sire vith 12' stay sing. The tap ate oottas wires shall
Ifs 0 gauge, vA intar wlats wins shall be 12-1/2 gauge. fin fooric small e1 fastw d is wood pests with not ins
that Is stapioa 1 1/2, log.
i Filter toolic shell is of %Vim pol"str, 114MIM w "IV" Tim with niaisla rtrVWN It 36 iC-/Ili. is., •Aa a
Mina M filtorll+g effieirry. foencC shall costal• altralleiat i0illta•s 40 staeiliiera.
f. If filtor to" 1s am sith A sd7sg111 of 9 16.1112. in, or grt",
allh
the "" "WIN N a" pat nun 6'. som"
+win fencing is net rsgairoo. gtm iso, mm win feKiay is rogtL•ed, aid pate spumy %Ull not neeN 9'.
STANNDARD TEMPORARY SILT PENCE
NTS
Z
MIN. PERIMETER - 7.7 -
MIN . AREA OPEN 2.5 -
A
PRECAST CONCRETE SUITABLE
F3A H-20 TRAFFIC LOADING
D.0-i
PLAN VIEW
CAST TRON FRAME t GRATE SUITABLE
FOR H2O TRAFFIC LOAOIN6
_LICAL CMP
OR RCP
H T
• CFiUS USED S ONE`
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.r.�i.r.�rM1 r�r, rpr�rv�r, r�rp4n-'%rv, rv,�rrrpr�rv�r •r�r.�rn rnr.Div.�r.�r.�r.�r.�ivvni..�c•r.•d..i�r.�r.�rv.�r.�.
COMPACTED SUBGRADE
SEMON B-B SSCTION A -A
STANDARD GRATE INLET CATCH BASIN
1"
A
EROSION CONTROL NARRATIVE
A. PROJECT DESCRIPTION
This project is located in southeastern Brunswick County approximately four miles west of
Ocean Isle Beach along the northern right-of-way of Highway 179. The project involves the
construction of a commercial building, associated parking, and stormwater collection and
detention.
B. SOILS AND TERRAIN
The northem half of the project area to be disturbed is flat with positive fall increasing on
the southern half of the project . The Soil Sunev of Brunswick County indicates that the
northern half of the project's prominent soil is Kureb fine sand, with the southern half of the
project's prominent soil is Leon fine sand. Kureb fine sand Is an excessively drained soft and
surface runoff is slow due to rapid permeability. Leon fine sand is a poorly drained soli,
however, surface runoff is slow due to rapid permeability in the surface layer and moderate to
rapid in the subsoil.
C. ADJACENT PROPERTY
The project is bounded to the south by Highway 179. to the east by Pine Acres
Subdivision, to the west by Inland Drive SW and to the north by property owned by W. E.
Kanipe.
D. EROSION CONTROL MEASURES
The primary land disturbing activities for this project are related to the construction of
the commercial building, associated parking, and stormwater facilities. To prevent sediment
losses to off -site areas during and following construction, the following precautions shall be
taken: silt fencing, seasonal grassing, construction entrance, inlet protection, and stormwater
detention.
CONSTRUCTION SEQUENCE
1. Obtain approval of Erosion Control Plan from NCDEHNR- Land Quality Section.
2. Install silt fencing and construction entrance.
3. Begin clearing and grubbing of disturbed area as shown on plans.
4. Perform rough grading of drive and parking areas.
5. Perform rough grading of building area and begin building construction.
6. Construct detention pond.
7. Install storm drainage pipes and catch basins.
8. Install inlet protection at catch basins.
9. Perform final grading and marl parking area.
10. Within thirty days following final grading activities, seed and mulch disturbed areas
which will not be built upon.
11. Maintain temporary erosion control measures until permanent ground cover is
established.
12. Obtain certificate of compliance through and on -site inspection by NCDEHIN'R Erosion
Control Engineer. Contact person is I�ir. Dan Sams, 910-395-3900.
13. Remove temporary erosion control measures and stabilize these areas immediately.
Permanent erosion control measures shall remain.
EROSICN CONTROL GENERAL NOTES
1. All construction activities shall be performed in compliance with the Sedimentation
Pollution Control Act of 1973.
2. All land disturbing activity is to be planned and conducted to limit exposure to the shortest
feasible time.
3. All construction sites and severely eroded areas shall be stabilized by the establishment of a
permanent ground cover.
4. As soon as all areas are permanently stabilized, all permanent measures have been installed,
arid final approval is received by the Erosion Control Engineer, erosion control temporary
measures may be removed
5. Over the life of the project, the Owner shall make periodic inspections to evaluate the
success in controlling erosion of soils to off -site areas. if areas are found where erosion is
taking place, the Owner shall take the necessary measures to remedy the situation.
SEEDING SCHEDULE
1. All disturbed areas due to construction and any severely eroded areas shall be stabilized by the
establishment of a permanent grass cover. The seed species shall be selected based on the type
soil present, seasonal conditions and other considerations. As an alternative. the contractor
may use the methods and schedules shown below: however, it is recommended that a specialist
be cons:lted with attention given to site specific conditions.
a. Cultivate area to a depth of 5 inches
b. Apply agricultural lime at the rate of 4000 lbs. per acre
c. Apply 10-20-20 commercial fertilizer at the rate of 500 Ibs. per acre
d. Sow grass seeds at the following rates:
IKilid Rite Per_Acre
Common Bermuda Grass
unhulled 25 lbs-
hulled 12 lbs.
Pensacola Bahiagrass 50 lbs.
Korean Lespedeza 25 lbs.
Tall Fescue 30 lbs.
e. Mulch with straw at the rate of 3250 to 4350 lbs. per acre.
f. Anchor straw with asphalt emulsion tack coat applied at the rate of 300 gallons per
acre.
2. Where it is not possible to establish a permanent grass cover in a reasonably short period of
e time d u to Seasonal consideration grass cover
s, a temporary as o shall be established.Th
P rY g
e
V temporaryco er shall include the 1 or m panting of annual grasses small grains such as rye grass,
howeve., shall not be considered a permanent grass cover. Where the season or other
conditions are not suitable for growing a temporary erosion resistant cover, mulch may be
applied however, mulch used alone shall be for the shortest time practical. A temporary or
permarrnt vegetative cover shall be established as soon as conditions are favorable.
3. Topsoil s!iall be used over unfavorable soil conditions for successful establishment of vegetative
cover.
4. Irrigateas necessary to optimize plant growth.
,- FINAL DRAWING
NOT RELEASED FOR CONSTRUCTION
• :�aataulfaFti
AR�
96-0093