20220746 Ver 1_More Info Received_20220801

Strickland, Bev
From: Mackenzie Wallace <[e-mail]>
Sent: Monday, August 1, 2022 3:14 PM
To: Cohn, Colleen M
Cc: Shanna Cahill; Lastinger, James C CIV USARMY CESAW (USA)
Subject: RE: [External] RE: Fee Received for Colonial Pipeline Company (CPC) 401 Submittal,
Line 24 Exposure, Chatham County ID # 20220746 Ver 1
Attachments: EC_RMX_MPDS_SC150BN_6.13.pdf
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Hi Colleen,
Please see below for my response in red and let me know if you have any questions.
Thank you,
Mackenzie Wallace
Staff Ecologist
Corblu Ecology Group, LLC
p) 770-591-9990 ext. 34
c) 404-927-5406
[e-mail]
www.corblu.com
40444
corblu
ECOLOGY GROUP
From: Cohn, Colleen M <[e-mail]>
Sent: Friday, July 22, 2022 4:44 PM
To: Mackenzie Wallace <[e-mail]>
Cc: Shanna Cahill <[e-mail]>; Lastinger, James C CIV USARMY CESAW (USA)
<[e-mail]>
Subject: RE: [External] RE: Fee Received for Colonial Pipeline Company (CPC) 401 Submittal, Line 24 Exposure, Chatham
County ID # 20220746 Ver 1
Hi Mackenzie,
I'm beginning my review of the project, and I have some questions.
1) Please provide more information on the "Submar revetment mats" and the "geotextile fabric" proposed. Erosion
control matting that incorporates plastic mesh and/or plastic twine should not be used along streambanks or
within wetlands. [15A NCAC 02H .0502(c)]
1

The Submar articulated closed cell concrete mattresses, 8' X 20' X 4.5". The mat elements are each 1 square foot
and have chamfered edges that allow the mat to articulate and react to changes in the stream. The taper will
allow mat articulation of a minimum of a 65° angle between any mat element and an adjacent element. Because
of this trapezoidal shape, there are interstitial cavities on both sides of the mat that can allow for sedimentation
and habitat for fauna. See specs on sheet C-801 of the plans for additional information. The geotextile fabric is
placed under the mat system to hold soils in place. It can either be nonwoven or woven. Typically Winnfab 315
or Propex 801 is used depending on site conditions at time of construction.
Only monofilament free, loose- or leno-woven erosion control blanket made of natural materials shall be used.
Please see the attached specification for what is typically used.
2) The application states "The maintenance project is located within the Cape Fear River Watershed, which does
not require protected riparian buffers." This project is located within the Jordan Lake watershed (part of the
Cape Fear River Watershed), which is subject to the Jordan Lake Riparian Buffer Rules. This area falls under the
delegated authority of Chatham County. Did you mean that any buffer impacts would be authorized by the
locally delegated authority, not the State? [15A NCAC 02H .0502(c) & 15A NCAC 02B .0267]
Correct, the project is within the Jordan Lake Watershed. It is our understanding that the pipeline maintenance
project is exempt under 15A NCAC 02B .0267Jordan Water Supply Nutrient Strategy: Protection of Existing
Riparian Buffers based on the criteria under condition 6a. EXEMPTION WHEN USES ARE PRESENT AND
ONGOING. CPC's Line 24 was installed in 1963-1964, and remains in use.
Thanks,
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
North Carolina Public Records Law and may be disclosed to third parties.
From: Mackenzie Wallace <[e-mail]>
Sent: Wednesday, July 6, 2022 10:47 AM
To: Cohn, Colleen M <[e-mail]>
Cc: Shanna Cahill <[e-mail]>
Subject: RE: [External] RE: Fee Received for Colonial Pipeline Company (CPC) 401 Submittal, Line 24 Exposure, Chatham
County ID # 20220746 Ver 1
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Thank you Colleen. I have not received any information from the USACE, but I will forward that on if anything comes
through.
Thank you,
Mackenzie Wallace
Staff Ecologist
Corblu Ecology Group, LLC
2

p) 770-591-9990 ext. 34
c) 404-927-5406
[e-mail]
www.corblu.com
.4.1
corblu
ECOLOGY GROUP
From: Cohn, Colleen M <[e-mail]>
Sent: Wednesday, July 6, 2022 10:42 AM
To: Mackenzie Wallace <[e-mail]>
Cc: Shanna Cahill <[e-mail]>
Subject: RE: [External] RE: Fee Received for Colonial Pipeline Company (CPC) 401 Submittal, Line 24 Exposure, Chatham
County ID # 20220746 Ver 1
Hi Mackenzie,
This is in my queue to review. The Raleigh Regional Office is experiencing a high volume of applications at this time, so
thank you so much for your patience.
If you've received any information from the USACE, including requests for additional information, could you please
forward those to me? That would be very helpful.
Thanks,
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
North Carolina Public Records Law and may be disclosed to third parties.
From: Mackenzie Wallace <[e-mail]>
Sent: Wednesday, July 6, 2022 10:18 AM
To: Cohn, Colleen M <[e-mail]>
Cc: Shanna Cahill <[e-mail]>
Subject: [External] RE: Fee Received for Colonial Pipeline Company (CPC) 401 Submittal, Line 24 Exposure, Chatham
County ID # 20220746 Ver 1
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
Report Spam.
Colleen,
3

I am following up on the 401 Water Quality Certification application submittal (below) for Colonial Pipeline Company,
Line 24 Exposure in Chatham County, submitted on 5/25/2022. Is there a status update available at this time?
Thank you,
Mackenzie Wallace
Staff Ecologist
Corblu Ecology Group, LLC
p) 770-591-9990 ext. 34
c) 404-927-5406
[e-mail]
www.corblu.com
corblu
FCOLOGY GROUP
From: [e-mail] <[e-mail]>
Sent: Thursday, June 2, 2022 11:15 AM
To: Mackenzie Wallace <[e-mail]>
Subject: Fee Received for Colonial Pipeline Company (CPC) 401 Submittal, Line 24 Exposure, Chatham County ID #
20220746 Ver 1
The North Carolina Division of Water Resources has received the application called Colonial Pipeline Company (CPC) 401
Submittal, Line 24 Exposure, Chatham County that you submitted on 5/25/2022 with corresponding fee received on
6/1/2022. The ID number for that project is 20220746, Version 1.
Reviewer Contact Information: Colleen Cohn - [e-mail]
Reviewing Office: Raleigh Regional Office - [phone]
If you have questions, please contact one of the staff members listed below:
Transportation Projects Contact: Kristi Lynn Carpenter at [e-mail]
All other Projects Contact: Sheri Montalvo at [e-mail]
Project file link: https://edocs.deq.nc.gov/WaterResources/Browse.aspx?dbid=0&startid=2352797
This email was automatically generated by Laserfiche workflow. Please do not respond to this email address, as
responses aren't monitored.responses aren't monitored.
4

EC_RMX_MPDS_BSC150BN_6.13
©2017, North American Green is a registered trademark. 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 determination of the suitability of any
information or material for the use contemplated, and its manner of use, is the sole
responsibility of the user. Printed in the U.S.A.
North American Green
5401 St. Wendel-Cynthiana Road
Poseyville, Indiana 47633
nagreen.com
800-772-2040
DESCRIPTION
The extended-term double net erosion control blanket shall be a
machine-produced mat of 70% agricultural straw and 30% coconut
fiber with a functional longevity of up to 18 months. (NOTE: functional
longevity may vary depending upon climatic conditions, soil, geograph-
ical location, and elevation). The blanket shall be of consistent
thickness with the straw and coconut evenly distributed over the
entire area of the mat. The blanket shall be covered on the top and
bottom sides with a 100% biodegradable woven natural organic fiber
netting. The netting shall consist of machine directional strands
formed from two intertwined yarns with cross directional strands
interwoven through the twisted machine strands (commonly referred
to as Leno weave) to form an approximate 0.50 x 1.0 in. (1.27 x 2.54
cm) mesh. The blanket shall be sewn together on 1.50 inch (3.81 cm)
centers with degradable thread. The blanket shall be manufactured
with a colored thread stitched along both outer edges (approximately
2-5 inches [5-12.5 cm] from the edge) as an overlap guide for adjacent
mats.
The SC150BN shall meet Type 3.B specification requirements estab-
lished by the Erosion Control Technology Council (ECTC) and Federal
Highway Administration’s (FHWA) FP-03 Section 713.17
Material Content
Matrix
70% Straw Fiber
30% Coconut Fiber
0.35 lbs/sq yd
(0.19 kg/sm)
0.15 lbs/sq yd (0.08
kg/sm)
Netting
Top: Leno woven 100%
biodegradable jute
Bottom: 100% biodegradable
organic jute
9.35 lb/1000 sq ft
(4.5 kg/100 sm)
7.7 lb/1000 sq ft
(3.76 kg/100 sm)
Thread Biodegradable
Standard Roll Sizes
Width 6.67 ft (2.03 m)8.0 ft (2.4 m)15.5 ft (4.72 m)
Length 108 ft (32.92 m)112 ft (34.14 m) 90 ft (27.43 m)
Weight ± 10%52.22 lbs (23.69 kg)65.28 lbs (29.61 kg) 101.2 lbs (45.9 kg)
Area 80 sq yd (66.9 sm)100 sq yd
(83.61 sm)
155 sq yd
(129.6 sm)
Leno weave
top only
Leno top and
bottom
Leno top and
bottom
Index Property Test Method Typical
Thickness ASTM D6525 0.25 in.
(6.35 mm)
Resiliency ECTC Guidelines 86%
Water Absorbency ASTM D1117 311%
Mass/Unit Area ASTM D6475 8.32 oz/sy
(282.9 g/sm)
Swell ECTC Guidelines 46%
Smolder Resistance ECTC Guidelines Yes
Stiffness ASTM D1388 0.42 oz-in
Light Penetration ASTM D6567 7.6%
Tensile Strength - MD ASTM D6818 201.6 lbs/ft
(2.99 kN/m)
Elongation - MD ASTM D6818 13.4%
Tensile Strength - TD ASTM D6818 164.4 lbs/ft
(2.44 kN/m)
Elongation - TD ASTM D6818 14.2%
Biomass Improvement ASTM D7322 641 %
Design Permissible Shear Stress
Unvegetated Shear Stress 2.10 psf (100 Pa)
Unvegetated Velocity 8.00 fps (2.44 m/s)
Slope Design Data: C Factors
Slope Gradients (S)
Slope Length (L)≤ 3:1 3:1 – 2:1 ≥ 2:1
≤ 20 ft (6 m)0.001 0.029 0.063
20-50 ft 0.051 0.055 0.092
≥ 50 ft (15.2 m)0.10 0.080 0.120
Roughness Coefficients – Unveg.
Flow Depth Manning’s n
≤ 0.50 ft (0.15 m)0.050
0.50 – 2.0 ft 0.050-0.018
≥ 2.0 ft (0.60 m)0.018
Specification Sheet – BioNet® SC150BN™ Erosion Control Blanket