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ENVIRONMENTAL DESIGN f IRM:
SOIL * ENVIRONMENTAL
CONSULTANTS, PA
010 Raven Ridge Road
Raleigh, NC 27614
(9 19) 846 -5900
PREPARED FOR:
�1 NEUSE PARK DEVELOPMENT CO.
9� 35 15 Queen Anne Drive
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ClAvton. NC 27527
(919) 550 -6276
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CONSTRUCTION DRAWINGS �OI�:
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WETLANDS AND STORMYYATER BWWCH
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CONSTRUCTION SEQUENCE:
Obtain NCDENR -DWQ and Johnston County approval for construction.
20 Locate and mark CX15tin6j utilities on site.
3. Install silt fence around perimeter of work area. All installed temporary ,
sediment and erosion control measures will be inspected weekly and
after a mayor rainfall event (> 0.5 inches) by the, Contractor.
Contractor tO supplement site erosion control measures as required by
site conditions. Upon inspection, any necessary repairs \A/Ili be
performed by the Contractor.
40 Perform level spreader construction including forebay, level spreader,
and flow bypass. Level spreader shall be constructed as shown on the
details. Bypass channel construction must stay within the temporary
and permanent impacts shown in the pre - construction notification based
on the channel dimension shown on Sheet 150
5. Perform stormwater detention on construction. Construct pond and
its appurtenances according to details on sheet 160
6. Apply temporary and permanent seeding measures tO disturbed areas
as final grading is reached. Line surrounding perimeter slopes with
CXGC15or matting on slopes greater than 3h: I V.
7. Once work area has been stabilized and ground cover is established,
remove silt fencing and any other temporary erosion control devices
installed for the purposes of level spreader construction.
8. Coordinate for wa ru Engineer, and Agency
Representatives.
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TEMPORARY SEEDING SPECIFICATIONS
General
All denuded areas shall be temporarily and permanently
seeded as follows. Seeding and mulching shall be done
immediately following construction. All disturbed areas
shall be dressed to a depth of 8 inches. The top 3
inches shall be pulverized to p a uniform seedbed.
Seeding
Seeding Dates
May I -Aug. 15
Aug. 15 -May
Permanent Seeding
Bypass channel
All other disturbed area
Mulch
Seeding Species
German Millet
Rye (grain)
e mu a ra55
5witc ra55
Rate, (Ib5lacre)
10
30
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Mulching shall consist of small grain straw applied at a
rate of 2 baie5/1 0 50[s ft. No asphalt shall be, used
for tacking. Use lute, excelsior matting or similar
material to cover exposed areas of concentrated flow.
M
Inspect and repair mulch frequently. Refertilize and
reseed as required to maintain vigorous temporary
vegetative cover during construction.
CONSTf�UCTION SEQUENCE � TEMPOfZAI�Y SEEDING SPECIFICATIONS
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(NOT TO SCALE)
3
Install Erosion Protection
to Allow for Smooth
Transition with Down5lOpC
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NOTE: REINFORCED CONCRETE
FOOTER AND LEVEL - SPREADER SILL
CONCRETE AND REINFORCEMENT TO
BE SPECIFIED, Al I nIN) Ft\lsinms Amn
REINFORCEMENT ARE P
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Invert Sediment
forebay
orebay /Flow Splatter /Level
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DA #
forebay
Area (IV-)
h (ft)
d (in)
L (ft)
1
1 12,7
1.38
8
129
2
28.6
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4
32
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3'Wide, 6" Deep
LEVEL SPREADER SYSTEM - TYPICAL PLAN VIEW
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SECTION E3-E3
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SMOOTHLY BLEND
CONTACT AREA
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(NOT TO SCALE)
CHANNEL LINING
5WALE T (FEET) B (FEET) d (FEET) Z (FEET) Slope LINING
DA #1 11.0 9.0 0.3 3.0 4.8% EROSION CONTROL MATTING
DA #2 4.5 2.5 0.3 3.0 6.0% EROSION CONTROL MATTING
DA #4 4.0 2.0 0.3 3.0 2.017o EROSION CONTROL MATTING
DA #5 4.0 2.5 0.3 3.0 4-317o EROSION CONTROL MATTING
DA #6 4.5 2.5 0.3 3.0 5.9% EROSION CONTROL MATTING
DA #7 6.0 3.5 0.5 3.0 2.0% EROSION CONTROL MATTING
3' Both
Directions
Wire Staples
3' Both
Directions
1st'¢` °�
Erosion Control Mattin
Anchor in Trench @Both
Top and Bottom Edges I I
I 1 EROSION CONTROL MATTING ANCHORING DETAIL
No.
Gauge
Steel
"Min.
6" Min.
WIRE STAPLE DETAIL
(NOT TO SCALE) 0 z
5; 0
U-1
(V L
0
0
3' Both
Directions
Wire Staples
3' Both
Directions
1st'¢` °�
Erosion Control Mattin
Anchor in Trench @Both
Top and Bottom Edges I I
I 1 EROSION CONTROL MATTING ANCHORING DETAIL
No.
Gauge
Steel
"Min.
6" Min.
WIRE STAPLE DETAIL
(NOT TO SCALE) 0 z
5; 0
U-1
(V L
0
0
Q
W
Q
G'- � .0-%
(NOT TO SCALE)
oc
U
N
w
D
LU
Ef�OSION CONTROL DETAILS �
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h 00
w
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a �
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~ S
U
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z
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0 40
s
Q
W
Q
G'- � .0-%
(NOT TO SCALE)
oc
U
N
w
D
LU
Ef�OSION CONTROL DETAILS �
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a�
h 00
w
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00
a �
N
~ S
U
�1
z
M r�
w �
baio
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0 40