20201203 Ver 1_PreFiling Acknowledgement Email_20200925

Strickland, Bev
From: [e-mail]
Sent: Friday, September 25, 2020 3:04 PM
To: [e-mail]
Subject: Pre -Filing Meeting Request Acknowledgement - DENC M-217 Exposure Repair -
20201203 Ver 1
Attachments: DWR Pre -Filing Meeting Request Form.pdf
The North Carolina Division of Water Resources has received the Pre -Filing Meeting Request Form for DENC M-217 Exposure Repair
that you submitted on 9/18/2020. The ID number for that project is 20201203, Version 1.
Reviewer Contact Information:
Reviewer:
Email:
Reviewing Office: Mooresville Regional Office - [phone]
You will either be contacted by staff to set up a meeting or notified by email that the 30 calendar day clock has been reached and you
are allowed to submit your application.
This email was automatically generated by Laserfiche workflow. Please do not respond to this email address, as responses are not
monitored.

ID#* 20201203 Version* 1
Regional Office* Mooresville Regional Office - [phone]
Reviewer List* Alan Johnson
Pre -Filing Meeting Request submitted 9/18/2020
......................................................................................................................................................................................................................................................
Contact Name * Joey Lawler
Contact Email Address* [e-mail]
Project Name* DENC M-217 Exposure Repair
Project Owner* Dominion Energy North Carolina
Project County* Rowan
Owner Address: Street Address
Address Line 2
city State / Frovince / Region
Fbstal / Zip Code Country
Is this a transportation project? * r Yes r No
Type(s) of approval sought from the DWR:
W 401 Water Quality Certification - r- 401 Water Quality Certification -
Regular Express
F- Individual Permit F- Modification
F- Shoreline Stabilization
Does this project have an existing project ID#?*
r Yes r No
Do you know the name of the staff member you would like to request a meeting with?
Alan Johnson
Please give a brief project description below.
The purpose of the project is to replace an exposed segment of gas line
and to re-establish a permanent crossing of a second stream and wetland
area north of the exposure such that mowing equipment can access the
area with minimal disturbance.
The project area consists of a portion of DENC's 50-foot wide M-217
natural gas pipeline easement. The existing easement is abutted on either
side by woodlands and is located on the west side of Wright Road in
Kannapolis, Rowan County, North Carolina. A portion of the existing gas
line has become exposed in an unnamed tributary to East Fork Coddle

LreeK. I ne malntalnea easement is aouttea Dy torestea areas on eltner
side. Small stream/wetland complexes are located north and south of the
stream where the exposed was identified. Mowing equipment crosses these
areas at locations where riprap has historically been placed. Riprap at the
northern crossing has become dispersed or embedded to a degree that it
is no longer effective to provide equipment support. The vicinity consists of
open land, pastures, forested areas and scattered residential
development.
To replace the segment of exposed gas line, DENC plans to install a new
section of pipe below the existing streambed at a sufficient depth to help
prevent its future exposure. The work will be conducted using industry -
standard mechanized equipment (track hoe and side -boom). Access for
construction equipment will be from Wright Road to the south. To prevent
impacts to a stream/wetland located between Wright Road and the
exposure, timber mats will be placed across an existing riprap crossing.
The mats will then be removed and the area restored upon project
completion.
The pipe replacement work will be conducted "in -the -dry" by constructing
coffer dams upstream and downstream of the exposure. A dry workspace
will then be established by pumping clean water from above the upstream
coffer dam and around the work area to below the downstream coffer dam.
The water will be pumped into a filter bag or dewatering structure sited in a
vegetated area on the west side of the work area, and the water will
eventually flow back into the stream. Secondary containment will be utilized
to prevent any leakage associated with the pump.
The new pipe will be staged on -site and fabricated as a "box -section" that
can be efficiently installed by conventional methods. The new pipe will be
placed at a depth approximately five feet below the bed of the stream in
order to maintain sufficient separation from the ground surface. Upon
installation and tie-in of the newgas line segment, the exposed gas line
segment will be removed. To inhibit the potential for future bank erosion
and instability, the streambanks within the easement, which are currently
eroded and nearly vertical, will then be graded at a 3:1 slope, seeded with
a native riparian seed mix and matted with coir fabric.
Minor permanent impacts to two wetland areas within the existing easement
are also proposed. Riprap was historically placed within portions of WA and
WB in order to accommodate passage of tractors with bush hogs and
maintenance equipment. Over time, the riprap within Wetland B has been
displaced and embedded such that vehicular passage through the area
cannot be accomplished without significant disturbance to the wetland. To
provide more reliable equipment access to this area during future
maintenance activities, the former rip -rapped crossing within the area north
of the exposure will be replaced with a new low-water crossing. The low
water crossing will be established by installing an articulated concrete block
(ACB) mattress across the stream and wetland. The mattress will be
embedded such that the stream can continue to flow through the area. The
embedded mattress will provide a firm equipment base, allowing mowing
equipment to cross the area with minimal disturbance, and the original
grade and contour of the wetland can be better maintained.
Please give a couple of dates you are available for a meeting.
9/23/2020
9/25/2020

9/30/2020
10/2/2020
Please attach the documentation you would like to have the meeting about.
2- Topo.pdf 1.02MB
3- Soils.pdf 310.85KB
4 - Aerial.pdf 774.54KB
1- Vicinity.pdf 683.2KB
pdF only
By digitally signing below, I certify that I have read and understood that per the Federal Clean Water Act Section
401 Certification Rule the following statements:
• This form completes the requirement of the Pre -Filing Meeting Request in the Clean Water Act Section 401 Certification
Rule.
1 understand by signing this form that I cannot submit my application until 30 calendar days after this pre -filing
meeting request.
1 also understand that DWR is not required to respond or grant the meeting request.
Your project's thirty -day clock started upon receipt of this application. You will receive notification regarding meeting location
and time if a meeting is necessary. You will receive notification when the thirty -day clock has expired, and you can submit an
application.
Signature
Submittal Date 9/18/2020