SW8970526_APPROVED PLANS_20040122

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
El CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC SATE
O�CJCD�iat
YYYYMMDD

4.
supply
PROJECT
/ SITE
VICINITY MAP
SCALE: 1" = 1 Mile
LEGENU
39 EXISTING GRADES
4o PROPOSED GRADES
- - - - - - - WETLAND DELINEATION LINE
• • • • • • . DRAINAGE BASIN DELINEATION LINE
PROPOSED VEGETATIVE SWALE
SILT FENCE
=I
STORMWATER POND #2 DATA SUMMARY
Total Built -Upon Area(Ac.).............................
0.2505
Total SW Drainage Area (Ac.)..........................
1.0744
% Impervious Area ..........................................
23.3
Computed Runoff from 1" Rainfall (CF)............
1,013
Provided Storage (CF)...... ........................
2,384
Required Surface Area (SF) ............................
810
Surface Area of Pond @ Normal Pool (SF)....,...
4,518
Surface Area of Pond @ Storage pool (SF).......
5,016
SW Storage Depth (Feet) ................................
0.5
Number of Orifices ..........................................
1
Diameter of Orifice (Inch)............ ....................
1
Elevation of Orifice Bottom (MSL)...................
38.00
Approx. Time for Drawdown (Days)..,,,•••,,,•,,,,•
2.583
Overflow Weir Elev. (MSL)........................
38.50
10-Year Routed Flowrate (CFS).......................
1
Flood Pool Elevation @ Q10 .............................
38.64
STORMWATER POND #2
SURFACE AREAS
ELEV.
F(SF)AY
POND
TOTAL
(SF)
(SF)
34
200
429
629
35
408
776
1184
36
678
1188
1866
37
1012
1674
2686
38
1768
2750
4518
38.5
1981
3035
5015
38.6
2020
3089
5109
38.7
2059
3144
5203
38.8
2099
3198
5297
.
SMOKE
TREE
COURT
�I
a r
r
s{
I r
r
1 /
�r
` 1 4
HEAVY \•, 1ti I
WOODED t
1
NOTE: Vegetative cover above permanent
pool shall be bermudagrass soc.
Wetland species are to be plont!d
on the 6:1 shelf. These speclet are:
Pontederia Cordato (Pickerelveed)
Juncus Effusus (Bog Rush)
Ludwigia (Water Primrose).
SECTION
-C
STORMWATER POND
#2
SCALE:
TOP BAFFLE
HORIZONTAL 1
'=30' 039.0
VERTICAL 1"
3'
9
3
STORAGE
POOL O 38.5
ERMANENT POOL
0 38.0
1
VEGETATIVE SHILF
TOP
BERM
s
O 6:1 SLOP
038.0
FROM 37.0 TO
8.0
6
3
F
EBAY
! 2
i O
1 �
I
I
I
BOT1
OM O 34.0
3
3
BOTTOM 33.0
0
3
M
7 1
SECTION I
WINDING RIVER PLANTATION
MAP CABINET 20, PAGE 303
I
♦ HEAVY
...._�=
; WOODED
%
PROPOSED
125' VEGETATIVE SA
r >/4ri
+V C� ,BASIN #2
/ Jo
+ -_
/ 41.29
y
0
00. �41.15 41.09 \\
ip
41-0 ! . 4(
\. \
100' VEGETATIVE SWALE . ?
.• Q,
1 ? jtK
41.3
1
y
;
3
/�
ki
POND
7
WATER ELM 33.10
/ !
/
•
rn
7 r
J�
,
r r
- !• ; � � �' --,� ,ham
„�
y�' `
if
X el ,
C�•
,. f,.
u••t\ .'
Ir J
A
BOTTOM O 34.0
TOP BERM 038.
STORMWATER' BOTTOM vNcR• -
POND #2 033.0
TOP BAFFLE CrA
039.0
STORAGE POOL m 38,5
PERMANENT POOL O 38.0
FAIRWAY 11 OUTLET STRUCTURE
1.0" ORIFICE O 38.0
WEIR 0 38.5
15" INV. 36.3
SECTION
D-D
STORMWATER
POND #2
S
E:
HORIZONTAL
1 "=30'
VERTi
i "=3'
9
3
STORAGE P
L O 35.5
PERMAN
NT POOL
VEGETATIVE SH
O
8.0
O 6.1 SLOPE
FROM 37.0 TO 38,0
6
3
0.to
0
3
3
BOTTOM
@ 33.0
0
1
3
ham'
441.4
` DOWNSPO
i
`S
PROPOSED `
115' VFrF-rAT]VF SwAI F
VEGETATIVE SHELF,
O 6:1 SLOPE
FROM 37.0 TO 38.0
02
DOWNSPOUT
41.25
;p DOWNSPOUT �;
MAINTENANCE
BUILDICVG
JT SLAB ELEV. 41.70
DOWNSPOUT
DOWNSPOUT.'
• DOWNSPOUT
J\
• Qo
• o�
• o
41.43
41.35
ti
41.34
N FUEL
TANKS
40.88
40.77
i �� 4O •
• • 40 r
• � .. � � -� _____,__yam
SECTION
A-
S
ORMWATER POND ill
SCALE:
ORIZONTAL 1"=3
9
VERTICAL 1 "=3'
3
STORAGE POOL 0
37.8
VEGETATIVE SHEL
0 6:1 SLOPE
FROM 36.5 TO 37
PERMANENT PDOL
O 37.5
TOP BERM O
7.O ��
FOREBAY
6
�`
3
r
BOTTOM O 36.0
0
m
Z
BOTTOM 0 34.0
3
3
0
I
3
SECTf
DN B-B
STORMW
ER POND 11
E:
HORIZOf
ITAL 1"=30'
VERTICAL
1"=3'
9
3
STORAGE POLO
37.8
PERMANENT COOL
O 37.5
36
3E
GETATIVE SHELF
fi
O 6.1 SLOPE
OM 36.5 TO 37.5
J
_/
BOTTO
O 34.0
3
3
0
3
40.33 1-'
DOWNSPOUT k� p- 40.5�� �y
DOWNSPOUT e1.37 \ 39.99 9.84 /ice/
STORMWATER POND 11 � SURFACE AREAS
BASIN #1
ELEV. FOREBAY POND TOTAL
(SF) (SF) (SF)
34 0 1933 1933
RIP- ISTIN 35 0 2584 2584
41.26 �' POND 36 940 3297 4237
h 37.5 1940 5264 7204
PROPOSED
p> 3'.7 2020 5421 7441
250' VEGETATIVE SWALE v 9 37.8 2060 5500 7560
l r �•
>x _
GQP eP
41.36
DRAIN 41.368-
F �+ OREBAY r, -
40.96 E TING :iT CC: 'a -SIGH
°p OND 'f•' SIMAGE POOL O 37.8 G+r V.ATER QUAun
yra PERMANEN POOL O 37.5 7i
•
41.+,,,
BOTTOM O 34.0
38 _ �,.,...,.:�i
41.35
` VEGETATIVE SH LF
0 6:1 SLOPI
.\ FROM 36.5 TO :7.5 /
40 ..._ f .' f;±�STORMVATER /- - - - - -- - - - -- - -
f
.A_ •
OUTLET STRUCTURE
` li;;' •
15, - 18" CPP
1.0" ORIFICE O 37.5
•
( •INV.
WEIR O 37.8
v,. ` _ -~~�
e•1 fit �
:•' 34.9
'Q
18" INV. 36.0
11
/r ins"��y
'RIP -RAP
' I ' z
+ , r
a q,0 3 , WETLANDS
o �
STORMWATER POND #1 DATA SUMMARY
Total Built -Upon Area(Ac.).............................
0.6032
Total SW Drainage Area (Ac.)..........................
1.1999
% Impervious Area ..........................................
50.3
Computed Runoff from 1" Rainfall (CF)............
2,188 .
Provided Storage(CF).....................................
2,215
Required Surface Area (SF) ............................
2,629
Surface Area of Pond @ Normal Pool (SF)........
7,204
Surface Area of Pond @ Storage Pool (SF).......
7,560
SW Storage Depth (Feet) ................................
0.3
Number of Orifices ..........................................
1
Diameter of Orifice (Inch) ................................
1
Elevation of Orifice Bottom MSl_
Approx. Time for Drawdown (Days) ................•
3
Overflow Weir Elev. (MSL)........................
37.80
10-Year Routed Flowrate (CFS).......................
1.5
Flood Pool Elevation @ Q10 .............................
37.95
�f
INV. 35.4
i \ i'�In/ RIP -RAP
/ / BUILT -UPON AREAS
BASIN TOTAL BASIN BUILDINGS CONCRETE PAD/ GRAVEL PARKING SAND BINS FUEL TANKS
# AREA (AC.) (AC.) CARTPATH (AC.) LOT (AC.) (AC.) (AC.
NOTE: ALL ROOF DRAINS MUST BE
DIRECTED TO AND COLLECTED 1 f �N\` i' 1 1 - 1999 0.1707 0.1736 0.2498 0.0000 0.0091
IN A STORMWATER POND.
i
2 1.0744 0.0823 0.0319 0.0977 0.0386 0.0000
1 ,
1 1! 3'�Yt0 f/ /
15 30 60
SCALE: 1 "=30'
0
N
O
4-1
N
U)

cI
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This drawing is the property of HOUSTON and ASSOCIATES, P.A.and
is not be reproduced in whole or in part without written permission from
HOUSTON and ASSOCIATES, P.A. (©copyright 1997
ALL RIGHTS RESERVED
ROADWA
EXISTING ROAu.
6' MIN.
PLAN VIEW
OR WIDTH OF
-Q, PROPOSED STREET,
25'WHICHEVER IS
GREATER
NEW CONSTRUCTION
SECTION VIEW
CONSTRUCTION ENTRANCE DETAIL
NTS
FASTEN WIRE FABRIC TO TRASH GUAF
AND GUARD TO RISER WITH 1/4' SS
PROVIDE 4X4 - W2.9 X W2.9 GALVANIC
WELDED WIRE FABRIC OVER TRASH
ALL PIPE SHALL BE HIGH DENSITY POLYETHYLE
SUITABLE FOR USE UNDER H2O LOADING
- 38.7' MSL
BOTTOM OF ORIFICE
ELEV. - 38.0- MSL
-BOTTOM OF TRASH
GUARD ELEV. = 37.5' MSL
CIRCULAR ORIFICE
DIAMETER - 1 1/8'
INV. ELEV - 36.5' MSL
' ONCRETE
SECTION B-B
TOP VIEW OF RISER
SECTION A -A
STORMWATER POND OUTLET STRUCTURE DETAIL
NTS
A
A. BURY THE TOP END OF THE JUTE STRIPS IN A ,�:. •
TRENCH 4 INCHES OR MORE IN DEPTH. -.-,--- j,
B. TAMP THE TRENCH FULL OF SOIL. SECURE •,,f //�/�
WITH ROW OF STAPLES, 10 INCH SPACING, W •/y/�
4 INCHES DOWN FROM TRENCH.
.•:..
C. OVERLAP -BURY UPPER END OF :
E.
:OF TOP STRIP 4 INCHES AND STAPLE.
:•...•.-
% Z:•::•s
TAMPED,0. EROSION STOP- FOLD OF JUTE BURIED IN
SLIT TRENCH AND .:.:..::.•...:
-'Xi ...........
DOUBLE ROW OF STAPLE %
.:::.::.:...::�.� •
.THE
REGUIRED TO KEEP
•
o:.•: o..•..:.•:::.•..•:.:.:
•: •...: .:
JUTE FIRMLY
•: ;::.:: �.;.•...: .::.•..:
:.......: :.
......•::.:•.
• •::.
:::.•:.•::
.................::•:•:::•:::•::•:
TYPICAL
STAPLES
i••:
.•:�:.�s;.❖.•..• .• .•:..:::::.:•.•.:•:GAU6E
WIRE
.•:.•.:•:.•..•
.:�:❖.�.•:::%•:•:::.•.•:-•
.................. ..,...:.:..
ENDS OF JUTE 4 INCHES INTO THE SOIL
AROUND
STABILIZATIONJUTE THATCHING
INSTALLATION PF JUTE THATCHING IN SW
WHERE APPLICABLE
Jute thatching shall be used in swales where the slope exceeds 0.015 (1.5%)
SPECIFICATION GUIDE
A Preparing a channel and seeding: To prevent meandering, slope channel to center to confine low flows to
the channel where thatching will be laid
L Fertilization - Lime and fertilize as specified to "Seeding Schedule". Disk as needed but do not
culUpa•
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 Seedings - Split the application- Sow half the seed before placing the thatching. Plant the remaining
half after the thatching is laid.
B. 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 Start laying the thatching from the top of the channel and unroll down grade so that one edge of the
strip coincides with the channel center. Lay a second strip parallel to the first on the other side of the
channel and allow a 2 inch overlap. If one roll of thatching does not extend the length of the channel,
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 row 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 any time after the center has been stapled. Closer stapling along the sides
is required where concentrated water may flow into the channel-
:r'here 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.
a 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
gives improved tie -down. The procedure is recommended on steeper slopes and gentler slopes of
sandy soil or areas subject to seepage. Spacings of stops vary from 25 to 100 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.
S Thatching - Sod Contact - Get contact between thatching and soil by rolling at right angle after laying,
stapling and seeding is complete. Eerfcct contact Is Yital 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
linger staples are used in loose or wet soil. Wire staples are better than wooden pegs because the
staples can be drivers flush with the matting. Wooden pegs extend above the thatching and may catch
trash that diverts water flow 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
critcal areas are secureLy stapltd down.
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 consulted 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
Intentionally left blank
c. Apply 10-20-20 commercial fertilizer at the rate of 500 lbs. per acre
d• Sow grass seeds at the following rates:
Kind Rate 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.
L 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
time due to seasonal considerations, a temporary grass cover shall be established. The
temporary cover shall include the planting of annual grasses or small grains such as rye grass,
however 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
permanent vegetative cover shall be established as soon as conditions are favorable.
3. Topsoil shall be used over unfavorable soil conditions for successful establishment of
vegetative cover.
1 4. Irrigate as necessary to optimize plant growth.
EROSION CONTROL NARRATIVE
A. PROJECT DESCRIPTION
The Maintenance Facility for Winding River Plantation Golf Course will be located on an
approximately 4 acre tract in the southeastern corner of Winding River Plantation. Included in this
project are the construction of a 12,000 SF building, associated parking and drives, stormwater
drainage structures, and stormwater detention pond.
Winding River Plantation is located in southern Brunswick County approximately 3 miles
southeast of Supply. The tract is composed of approximately 1,100 acres, the southwestern
boundary of which is formed by the Lockwood Folly River. Access to this property can be
attained by traveling southeast from Supply along NC 211 approximately 2.5 miles, turning south
on NCSR 1114, and traveling approximately 1/2 mile to the northern property boundary. NCSR
1114 passes through the property and immediately adjacent to the Maintenance Facility site.
Runoff from the site enters wetlands and thence finds its way to the Lockwood Folly River.
The current land use of the project area and surrounding properties is primarily woodlands.
B . SOILS AND TERRAIN
The site is flat to slightly rolling with a ridge near the middle and a draw along the
southeastern property line. Relief ranges from approximately 42' MSL to approximately 34' MSL.
The Soil 5urveyBimnswick County indicates that the only soil within the project boundaries
belong to the Kureb series. Field investigation, however, indicates that Leon soil extends up
through the draw. The Kureb soils consist of excessively drained fine sand on uplands. The Leon
soils consist of poorly drained fine sands on uplands.
C . EROSION CONTROL MEASURES
The stormwater detention pond and permanent grassing will provide long-term protection
against the release of eroded soils to off -site properties. Silt fencing and construction entrance will
be the temporary erosion control measures.
ROSION CONTROL GENERAL NOTE
1. All construction activities shall be performed in compliance with the Sedimentation Pollution
Control Act of 1973.
2. All land disturbirg 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. Where it is not possible to establish a permanent ground cover in a reasonably short period of
time due to seasonal considerations, a temporary ground cover shall be established. The
temporary cover shall include the planting of annual grasses or small grains. Where the
season or other conditions are not suitable for growing a temporary erosion resistant cover,
mulch may be applied. Mulch used alone shall be for the shortest time practical. A
temporary or permanent vegetative cover shall be established as soon as conditions are
favorable.
5. Silt fencing, and other temporary erosion control measures as may be necessary, shall be
installed prior to the start of construction. As soon as the area is stabilized, the temporary
measures may be removed.
6. Topsoil shall be used over unfavorable soil conditions for successful establishment of
vegetative cover.
7. Irrigate as necessary to optimize plant growth.
8. Over the life of the project, the owner shall make periodic inspections to evaluate the success
in controlling erasion 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.
CONSTRUCTION SEQUENCE
1. Obtain approval of Erosion Control Plan from iNCDEHNR - Land Quality Section.
2. Install construction entrance and silt fencing.
3. Clear and grub along route necessary to provide access to proposed pond.
4. Clear sites at proposed pond.
5. Construct pond,
6. Clear and grub maintenance building, parking, and drive areas.
7. Construct open :hannels and containment berms.
8. Rough grade parking lot and drive areas.
9. Construct maintenance building.
10. Construct drive and parking areas.
11. Seed and mulchdisturbed areas within 30 days after Finished grades are established.
12. Maintain erosion control measures until permanent ground cover is established. (The use
of winter rye Fass Is considered a temporary measure and will not be accepted as
permanent grou'td cover.)
13. Obtain certificate of compliance through on -site inspection by Erosion Control Engineer.
Contract personMr. Dan Sams (919-256-4161).
14. Remove temporary erosion control measures and stabilize these areas immediately.
Permanent eroson control measures shall remain.
HNAL D MU"
NOT RELEASED FORCONSTRUCTION
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