20030909 Ver 2-_More Info Received_20040428

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Archer Western
Contractors
April 28, 2004
NC Department of Transportation
P.O. Box 14996
Greensboro, NC 27415-4996
Attn: Christopher D. Kirkman, P.E.
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APR W~ 2pp4
RE: Greensboro Western Loop, Contract No. C200940
Stream Relocation Plan -Site 28
Dear Chris,
On April 26, 2004 a meeting was conducted regarding Environmental
Stewardship and Permits. We have found this meeting to be insightful and a
value to all attendees. I would hope that meetings with similar agendas can be
scheduled to further educate both my staff and subcontractors as well as your
staff as to the importance of following the Permit guidelines to their fullest extent.
An immediate result of the meeting was a request that Archer Western propose a
plan to relocate the stream at Site 28. Our planned method is herein attached for
your review/approval. I am requesting that this request be given the highest
priority for approval so that the area can be stabilized to its final design as soon
as possible.
If there are any questions, I may be contacted at 336-362-1299 or 336-632-4270.
Sincerely,
Archer Western Contractors, Ltd.
~~iU~
Daniel M. Lie erman
Senior Project Manager
Cc: File
Dave Hurley
2909 Cromwell Rd. A Member of The Walsh Group
Greensboro, NC 27407 An Equal Opportunity Employer
Phone: [phone]
Fax: [phone]
www.walshgroup.com

Stream Relocation -Site 2~
The stream relocation will start from the down stream side at approximately
station 29+50 and proceed to station 31+50. As shown on the attached
sketch, we have identified three areas that are numbered Area 1, Area 2 and
Area 3.
Temporarily relocate the existing stream from Area 1 to Area 2
A) The temporary channel will be constructed in the dry, leaving a 10'
plug between the existing stream and the temporary channel.
B) The temporary channel will be stabilized with coir fiber on the
channel bottom and fabric for soil stabilization on the banks.
C) A temporary channel crossing will be placed in the temporary channel
to access the permanent stream relocation area.
D) Upon completion of this operation, a field inspection will be
conducted prior to rerouting the stream into the temporary channel.
E} Once approved, the 10' plug will be removed in the lower end and the
area stabilized in the wet by use of coin fiber and fabric materials.
F) The upper 10' plug will then be removed to allot~v the stream to flow
into the temporary stream. The area of the plug will then be stabilized
with fabric materials.
G) Permanently construct the permanent steam as shown on the attached
sketch. Use coir fiber and soil stabilization fabrics to stabilize the
stream channel.
H) Conduct a field inspection prior to rerouting the stream from the
temporary channel to the permanent stream location.
Proceed between Area 2 and 3 in like manner

5.2.4 Fabric Lined Diversion Channel
Purpose Used to divert the normal flow and small storm events around the
work area without the use of pumping operations. The diversion
channel is typically constructed adjacent to the work area and is
lined with apoly-fabric to prevent erosion of the diversion
channel.
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1 Figure 32. Fabric Lined Diversion Channel
~ Conditions Where / When adequate space and slopes exist adjacent to the work
9 Practice Applies area.
B
Conditions Where / Pipe extensions, headwall installations and some pipelculvert
Q Practice Does Not replacements where adequate space is unavailable.
Q APPLY
p Construction Step 1 -Install sediment controls.
~ Step 2 -Excavate the diversion channel without disturbing the
existing channel.
Step 3 -Place poly-fabric liner in diversion channel with a
minimum of 4 feet of material overlapping the channel banks.
[] Secure the overlapped material using at least 1 foot of fill
material.
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BMPs for Construction and Maintenance Activities
North Carolina Department of Transportation Page 71
August 2003
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5.2 - Fiow Diversion
Step 4 -Connect the downstream diversion channel into the
downstream existing channel and secure the poly-fabric liner at
the connection.
Step 5 -Connect the upstream diversion channel into the
upstream existing channel and secure the poly fabric liner at the
connection.
Step 6 -Construct an impervious dike in the existing channel at
the upstream side to divert the flow into the diversion channel.
Step 7 -Construct an impervious dike in the existing channel at
the downstream side to isolate the work area.
Step 8 -Upon completion of the culvert construction, remove the
impervious dikes and divert the channel back into the culvert.
Step 9 -Remove the poly-fabric liner and fill in the diversion
channel.
Step 10 -Establish vegetation on fill section and all other bare
areas.
Maintenance Check the poly-fabric liner for stability during normal flow
• Check the liner for stability after each rainfall event
Typical Problems Improperly installed liners. E
• Filter fabric not installed (secured) properly. ~
• Earthen material allowed to come into contact with water
body. ~
• There maybe certain times of the year, especially in the
summer, when fabric-lined channels may cause thermal ~
pollution. This could be a problem in trout waters during
certain times of the year.

North Carolina Department of Transportation BMPs for Construction and Maintenance Activities
August 2003
Page 72
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NORTH CAROLINA DEPARTP.IENT OF TRANSPORTATION
AUGUST 2003
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