20220212 Ver 1_More Info Received_20220408

Strickland, Bev
From: Deborah Shirley <[e-mail]>
Sent: Friday, April 8, 2022 4:39 PM
To: Cohn, Colleen M
Cc: Norton, April R CIV USARMY CESAW (USA)
Subject: [External] RE: Solana DWR#20220212
Attachments: EC_RMX_MPDS_VMC350_1.19.pdf; NAG_TECHBTN_VMAX_4.21.pdf
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Colleen,
Please see our responses and the information provided by the project engineer.
1. Please provide additional information such as product specifications on the permanent turf reinforcement mats
proposed in In impact 8. What materials are these mats made of?
The proposal for the matting would involve a product similar to the attached, they are designed so that
after they are vegetated they become grown over and are no longer visible.
2. Can you please provide some additional information on the area I've circled in blue from the Impact 8 maps
(below)? I'm not sure I am understanding. There is a lot going on in this area.
Please see the below snippet with the engineers response regarding the pipe that you circled in your request for
more information.
1

1\N‘x1k\ i\Y1 `•.v' `\
Wet Detention Basin outfall pipe. Pipe
will penetrate retaining wall and
discharge onto the Permanent Turf
Reinforcement Matting adjacent to the
Box Culvert.
We anticipate that this provides the information for you to continue your review of the Pre -Construction Notification
application. Please let me know if you have any questions.
Thank you,
DEBORAH E. SHIRLEY
Project Manager -Regulatory Specialist
Soil & Environmental Consultants, PA
North Quarter Office Park
8412 Falls of Neuse Road, Suite 104
Raleigh, NC 27615
Office [phone]
Direct [phone]
Mobile [phone]
[e-mail]
Visit us at sandec.com
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2

From: Cohn, Colleen M <[e-mail]>
Sent: Friday, April 8, 2022 3:50 PM
To: Deborah Shirley <[e-mail]>
Cc: Norton, April R CIV USARMY CESAW (USA) <[e-mail]>
Subject: Solana DWR#20220212
Good afternoon,
I am reviewing the above referenced project, and in order to complete the review, some additional information is
required:
1. Please provide additional information such as product specifications on the permanent turf reinforcement mats
proposed in In impact 8. What materials are these mats made of?
2. Can you please provide some additional information on the area I've circled in blue from the Impact 8 maps
(below)? I'm not sure I am understanding. There is a lot going on in this area.
3
Thanks,
RETAINING
AI.
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•
BUFFED, ZONE 2 LIMIT
*IP *At
Colleen Cohn
Environmental Specialist II
North Carolina Department of Environmental Quality
Division of Water Resources
Raleigh Regional Office
380o Barrett Drive
Raleigh, NC 27609
Office: 919-791-4258
E-mail correspondence to and from this address may be subject to the
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North Carolina Public Records Law and may be disclosed to third parties.
4

1 ROLLMAXTM
(� ROLLED EROSION CONTROL
-1
Specification Sheet
VMax° C3501 Turf Reinforcement Mat
DESCRIPTION
The composite turf reinforcement mat (C-TRM) shall be a
machine -produced mat of 100% coconut fiber matrix incorporated
into permanent three-dimensional turf reinforcement matting.
The matrix shall be evenly distributed across the entire width
of the matting and stitch bonded between super heavy duty
UV -stabilized nettings with 0.50 x 0.50 in. (1.27 x 1.27 cm)
openings, an ultra heavy duty UV -stabilized, dramatically
corrugated (crimped) intermediate netting with 0.5 x 0.S in.
(1.27 x 1.27 cm) openings, and covered by a super heavy duty
UV -stabilized nettings with 0.50 x 0.50 in. (1.27 x 1.27 cm)
openings. The middle corrugated netting shall form prominent
closely spaced ridges across the entire width of the mat. The
three nettings shall be stitched together on 1.50 in. (3.81 cm)
centers with UV -stabilized polypropylene thread to form
permanent three-dimensional turf reinforcement matting.
All mats shall be manufactured with colored thread stitched
along both outer edges as an overlap guide for adjacent mats.
The C350 shall meet Type 5A, B and C specification requirements
established by the Erosion Control Technology Council (ECTC) and
Federal Highway Administration's (FHWA) FP-03 Section713.18.
Matrix 100% Coconut Fiber 0.5lb/sy
(0.27 kg/sm)
Top and Bottom, UV -Stabilized 8 Ib/1000 sf
Netting Polypropylene (3.91 I(g/100 sm)
Middle, Corrugated UV -Stabilized 24lb/1000 sf
Polypropylene (11.7 kg/100 sm)
Thread Polypropylene, UV Stable
Width
6.5 ft (2.0 m)
8 ft (2.44 m)
Length
55.5 ft (16.9 m)
90 ft (27.4 m)
Weight ±10%
37lbs (16.8 kg)
74lbs (33.6 kg)
Thread
40 sy (33.4 sm)
80 sy (66.8 sm)
Thickness
ASTM D6525
0.73 in.
08.54 mm)
Resiliency
ASTM D6524
90%
Density
ASTM D792
0.917 g/cm3
Mass/Unit Area
ASTM D6566
18.36 oz/sy
(624 g/sm)
UV Stability
ASTM D4355/
80%
1000 HR
Porosity
ECTC Guidelines
99%
Stiffness
ASTM D1388
0.24 in. -lb
(275990 mg -cm)
Light Penetration
ASTM D6567
72%
Tensile Strength - MD
ASTM D6818
585.8 Ibs/ft
(8.70 kN/m)
Elongation - MD
ASTM D6818
45.3%
Tensile Strength - TD
ASTM D6818
687.6 Ibs/ft
(10.20 kN/m)
Elongation - TD
ASTM D6818
19.S%
Biomass Improvement
ASTM D7322
380%
Design Permissible
Shear
Stress
Duration
Long Duration
Phase 1 Unvegetated
3.2 psf (153 Pa)
3.0 psf (144 Pa)
Phase 2 Partially Veg.
10.0 psf (480 Pa)
10.0 psf (480 Pa)
Phase 3 Fully Veg.
12.0 psf (576 Pa)
10.0 psf (480 Pa)
Unvegetated Velocity
10.5 fps (3.2 m/s)
Vegetated Velocity
20 fps (6.0 m/s)

Slope Gradients (S)
Flow Depth
Manning's n
Slope Length (L)
<_ 3:1
3:1 - 2:1 >- 2:1
< 0.50 ft (0.15 m)
0.041
<- 20 ft (6 m)
0.0005
0.015 0.043
0.50 - 2.0 ft
0.040-0.013
20-50 ft
0.018
0.031 0.050
>_ 2.0 ft (0.60 m)
0.012
-> 50 ft (15.2 m)
0.035
0.047 0.057
NORTH
Western Green
4609 E. Boonville -New Harmony Rd.
Evansville, IN 47725
©2019, North American Green is a registered trademark from Western Green. Certain
Products and/or applications described or illustrated herein are protected under one or
more U.S. patents. Other U.S. patents are pending, and certain foreign patents and
patent applications may also exist.Trademark rights also apply as indicated herein. Final
AM E RI CAN
determination of the suitability of any information or material for the use contemplated,
GREEN'
nagreen.com
800-772-2040
and its manner of use, is the sole responsibility of the user. Printed in the U.S.A.
E C-M P D S-V M X-C 3 5 0-1.19

VMaxO TRMs
ROLLMAXT11
ROLLED EROSION CONTROL
A Permanent Turf Reinforcement Mat Solution for Every Design
The VMax system of permanent TRMs are ideal for high -flow channels, streambanks, shorelines, and other areas needing permanent vegetation
reinforcement and protection from water and wind. Our VMax TRMs combine a three-dimensional matting and a fiber matrix material for all-
out erosion protection, vegetation establishment and reinforcement. The VMax TRMs are available with various performance capabilities and
support reinforced vegetative lining development from germination to maturity.
VMax° Unique Three -Dimensional Design
North American Green VMax TRMs are each designed to maximize performance through all development phases of a reinforced vegetative
lining. The corrugated matting structure lends a true reinforcement zone for vegetation entanglement, especially compared to flat net mats.
The unique design of the corrugated matting also helps to create a shear plane that deflects flowing water away from the soil surface. And
the incorporation of a fiber matrix supplements the 3-D structure by creating a ground cover that blocks soil movement and aids in vegetation
establishment.
Four VMax Turf Reinforcement Mats Designed for Every Level of Performance
5200
SC25O I
C35O
PSSO
Matrix Fiber
100% Straw
70% Straw / 30% Coconut
100% Coconut
100% Polypropylene
Netting Types
Top and Bottom light -weight
Top and Bottom UV -stabilized
Top and Bottom heavy -weight
Top and Bottom ultra heavy -
UV -stabilized PP, Crimped PP
PP, Crimped PP center net
UV-stabilized PP, Crimped PP
weight UV -stabilized PP,
center net
center net
Crimped PP center net
Typical Slope
Applications
1:1 and greater
1:1 and greater
1:1 and greater
1:1 and greater
(H:V)
Channel
Unvegetated: 2.3 psf
Unvegetated: 3.0 psf
Unvegetated: 3.2 psf
Unvegetated: 4.0 psf
Shear Stress
Vegetated: 10.0 psf
Vegetated: 10.0 psf
Vegetated: 12.0 psf
Vegetated: 14.0 psf
Threshold
Channel
Velocity
Unvegetated: 8.5 fps
Unvegetated: 9.5 fps
Unvegetated: 10.5 fps
Unvegetated: 12.5 fps
Threshold
Vegetated: 18 fps
Vegetated: 15 fps
Vegetated: 20 fps
Vegetated: 25 fps
NORTH
AMERICAN
GREEN'
Copyright 2021.
North American Green, LLC.
4609 E. Boonville -New Harmony Rd., Evansville, IN
[phone] 1 www.nagreen.com
NAG_TECHBULL_VMAX_4.21

VMaxO TRMs Cont.
Selecting the Right VMax TRM
Choosing the right VMax TRM can be made easy by utilizing our
Erosion Control Materials Design Software (www.ecmds.com), which
allows users to input project specific parameters for channels, slopes,
spillways, and more and ensures proper evaluation, design, and product
selection in return. Our four VMax TRMs offer varying performance
values, fiber matrix longevities, and price points, to help you meet your
project specific goals.
Twist Pin + VMax TRM - an Ideal Installation
Utilizing the VMax TRMs in conjunction with Twist Pin fastener
technology can result in an installed system that pushes TRM
performance with increased factors of safety. The combined system
has been shown to have superior pullout strength performance up
to 200 Ibs when compared to installation with traditional wire staples
and pins. This is up to 10x the pullout resistance of wire staples and
pins. Additionally, the use of the twist pins provides intimate contact
between the TRM and the soil, and have been shown to be effective
in a wide range of soil types. With a quick and easy installation using
an electric drill and custom chuck, the TRM+Twist Pin system can
eliminate time and labor costs from day 1 through project release.
VMax turf reinforcement mat being installed on a channel application
(top right), twist pins installed with TRMs can have increased system per-
formance and pullout resistance (middle right), twist pins are available in
8" and 12" lengths and two coil configurations designed for hard or soft
soil types (lower right).
Comparison of common TRM fasteners based on pullout performance
and typical application (below).
Fastener
Pullout Resistance (lb)
Comment
6" Round Top Pin
14
Best for hardened soils where other fasteners are damaged during installation.
6" Regular U-staple
42
Standard fastener that develops additional pullout as legs may deflect and add friction
during installation.
12" Pin with Washer
35
Standard fastener good for soils where staples can be bent frequently and are too
difficult to install.
18" Pin with Washer
27
Standard fastener good for soils where staples are frequently bent and 12" straight pins
fail to provide sufficient pullout because surface soil is wet or loose.
Twist Pin
170
Upgraded fastener that provides high pullout and ideal for loose or soft soils.
NORTH
AMERICAN
GREEN'
Copyright 2021.
North American Green, LLC.
4609 E. Boonville -New Harmony Rd., Evansville, IN
[phone] 1 www.nagreen.com
NAG_TECHBULL_VMAX_4.21