20171653 Ver 1_Quarter 2 Stream Monitoring_20190226

Strickland, Bev
From: Jennifer Robertson <[e-mail]>
Sent: Monday, February 25, 2019 7:18 PM
To: 'Janiczak, Catherine M CIV USARMY CESAW (US)
([e-mail])'; Johnson, Alan
Cc: '[e-mail]'
Subject: [External] Old Murdock Road - Quarter 2 Stream Monitoring / DWR Project # 17-1653
and Corps Action ID 2017-02537
Attachments: Q2 Monitoring Flattened.pdf
rnal email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
NNNNVLnc.gov
Cathy/Alan,
Attached is the second quarter monitoring report for Old Murdock Road. Please let me know if you have any
questions.
Thank you,
Jennifer L Robertson, President
ATLAS Environmental, Inc.
712 English Tudor Lane
Charlotte, NC 28211
[phone] office
[phone] mobile
www.atiasenvi.com
Offices in Asheville and Charlotte
NMENTAL

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VIRONMENTAL
February 25, 2019
NC Division of Water Resources U.S. Army Corps of Engineers
401 & Buffer Permitting Unit Asheville Regulatory Field Office
Attn: Mr. Alan Johnson Attn: Ms. Cathy Janiczak
610 East Center Avenue, Suite 301 151 Patton Avenue, Room 208
Mooresville, NC 28115 Asheville, North Carolina 28801
Re: Old Murdock Road Industrial - +/- 27.7 acres
Site Address: 283 Old Murdock Road, Troutman NC 28166
Nationwide Permit 39 Stream Monitoring Requirement — Quarter 2
DWR Project #: 17-1653 / Action ID: 2017-02537
Alan/Cathy:
Atlas Environmental Inc. staff conducted a pedestrian review of the Old Murdock Road
Industrial site, referenced above, on January 21, 2019 for the second quarterly review of
the stream monitoring. As required in the North Carolina 401 Water Quality Certification
issued January 26, 2018 and as specified in condition 3: Due to filling the headwaters,
the stream shall be monitored for a distance of at least 150 linear feet... quarterly for one
year with a conditional additional year. Atlas staff has been periodically observing the
receiving water since the 401 was issued in January 2018.
Summary Table
Quarter Monitoring Period
Completed
1 October 2018
YES
2 January 2019
YES
3 Aril 2019
4 July 2019
The following report represents site conditions on January 21, 2019 and satisfies the
second quarterly requirement of DWR # 17-1653, Certification 4139, Condition 3.
Best regards,
�A+ df
Jennifer L Robertson, President
[e-mail]
ATLAS Environmental, Inc.
712 English Tudor Lane
Charlotte, North Carolina 28211
704-512-1206 (m) / 828-712-9205 (o)
www.atlasenvi.com / Serving the Southeast US

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VIRONMENTAL
Introduction
Atlas Environmental Inc. (Atlas) staff conducted a pedestrian survey of the Old Murdock
Road Industrial site on January 21, 2019 to document the status of the stream located
immediately north of the project site across Murdock Road. The stream flows North
through a culvert located under Murdock Road for approximately 975 linear feet to a
confluence with Duck Creek, a class C water. Permitted impacts on site included 0.11
acre of wetland and 63 linear feet of stream. As required in the North Carolina 401
Water Quality Certification issued January 26, 2018 and as specified in condition 3: Due
to filling the headwaters, the stream shall be monitored for a distance of at least 150
linear feet down gradient of Murdock road... quarterly for one year with the possibility of
an additional year depending on the results.
Assessment
Rain was recorded within 48 hours prior to the stream assessment at the nearest
weather station located in Troutman NC. The weather station is located approximately
1.2 miles south of the subject site. The stream was evaluated in detail for
approximately 150 linear feet north of the culvert under Murdock road. The remainder
of the stream, to the confluence with Duck Creek, was walked to access general
stability.
Strong perennial stream indicators were observed along the first 150 linear feet of the
stream assessment. The stream exhibited strong bed and bank with visible hydric soils.
The stream was receiving flow from the culvert under Murdock Road. Water was
flowing along the entire assessment reach to the confluence with Duck Creek. Only one
of the sediment basins located on site was discharging, the smaller basin. Due to the
lack of water in the largest main basin it is the opinion of Atlas staff that the discharging
water is originating from the filled head waters as groundwater flow. It is also suspected
that the hydrogeology of the subject site is receiving additional groundwater input from
BMP infiltration. Due to the small drainage area of the stream, 0.067 square miles, the
observed base flow is appropriate.
Atlas staff have been periodically observing the receiving stream since January 2018.
The stream showed signs of instability prior to development commencing at the project
location. The culvert underneath Murdock Road is perched and the stream showed
signs of historic unstable banks. Atlas staff expects the stream to repair itself over time
as Duck Creek has done further downstream.
Atlas staff observed both BMPs on site and only one was discharging. The main
permanent wet pond was not discharging, but the smaller pond along Murdock Road
was discharging through the skimmer. The volume of water in the stream was greater
than what was discharging through the one skimmer.
ATLAS Environmental, Inc.
712 English Tudor Lane
Charlotte, North Carolina 28211
704-512-1206 (m) / 828-712-9205 (o)
www.atlasenvi.com / Serving the Southeast US

VIRONMENTAL
General Stability Assessment
The geomorphological features of the stream indicate long lasting instability potentially
originating along Duck Creek. The unnamed tributary is highly entrenched with portions
of the stream being deeper than the maximum width. These conditions, lacking
floodplain access, increase the channelization and sheer stresses during flood flows
resulting in the upstream migration of head cuts and extreme bank erosion.
Sections of the unnamed tributary are beginning to widen, due to bank erosion,
abandoning the historic floodplain and forming small vegetated floodplains within the
high terraces. While it is not possible to date the period of initial instability due to the
extent of entrenchment and current bar building the cause of instability is not due to the
construction at the Old Murdock Road Industrial site.
ATLAS Environmental, Inc.
712 English Tudor Lane
Charlotte, North Carolina 28211
704-512-1206 (m) / 828-712-9205 (o)
www.atlasenvi.com / Serving the Southeast US

Site Photographs: 1/21/2019
Culvert under Murdock Road showing baseflow
Vegetated terrace and entrenchment
Main wet pond is not discharging
Vegetated terrace and entrenchment
Active bank erosion and entrenchment
J-$
v.
Skimmer in small pond discharging under
Murdock Road.
ATLAS Environmental, Inc.
712 English Tudor Lane
Charlotte, North Carolina 28211
704 -512 -1206(m)/828 -712-9205(o)
www.atlasenvi.com / Serving the Southeast US