20071249 Ver 1_More Info Received_20110405

_A-0-0 07
Engineers, Surveyors, Planners, Scientists
March 291, 2011
Steve Chapin
United States Army Corps of Engineers
151 Patton Avenue, Room 208
Asheville, North Carolina 28801-5006
and
Cyndi Karoly
Wetlands and Stormwater Branch Manager
N.C. Division of Water Quality
512 N. Salisbury St.
Raleigh, NC 27603
111@12MR 0
APR 0 5 2011
DENR-WATER WNM
WETLANDS AND SMRMI9ATER BRANCH
Subject: Thompsons Fork and Tributary Restoration; Advanced Notice of Tributary
Maintenance Work (DWQ Project # 07-1249, USACE Action ID: SAW-2007-02334, EEP Project
#: D06030-A)
This letter was created in order to coordinate maintenance work for stream restoration project
implemented through the NCEEP's full-delivery ecosystem restoration program. The stream
restoration project is located near the City of Marion, in Nebo Township, McDowell County, North
Carolina. The project realties include the restoration of 2,727 linear feet of the Thompson Fork
mainstem and 1,948 linear feet of an unnamed tributary (UT); also included is 390 linear feet of
enhancement and 356 linear feet of preservation along UT- The stream is required to me
monitored for 5 years. 2010 was Year 2 out of 5 for monitoring activities.
In 2009 and 2010 there was observed to be scattered areas along UT (in the upper portion of
the restoration reach) that were developing wetland vegetation within the stream channel,
attributed to the deposition of sediment. The wetland vegetation will decrease channel flow
capacity and reduce flow velocities during times of low flow, which will lead to the deposition of
additional sediment and continued aggradation within the stream channel. Based on our
observations of the channel condition and discussions with NCEEP, we believe the appropriate
corrective action is to remove the accumulated sediment and vegetation from the channel and
restore a flow condition that we believe will prevent a recurrence of the described impairment.
Wetlands Resource Center intends to perform work along UT during the spring of 2011 in order
to clear the channel of excessive sediment and wetland vegetation, and restore the channel to a
more functional channel morphology. The work shall be completed using a small excavator and all
material removed from the channel will be deposited and stabilized outside of the flood prone
area of the channel. This letter is intended as a coordination document with the various regulatory
agencies listed with the purpose of informing them of the impending work to be done on the
channel. Any questions or comments should be directed to Cal Miller (with: Wetlands Resource
Center) at [phone], Miles Hebert, P.E., (with: EMH&T) at [phone] or myself (with:
EMH&T) at [phone].
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Mr. Steve Chapin and Ms. Cyndi Karoly 3/29/2011
Subject: Thompsons Fork and Tributary Restoration; Advanced Notice of Tributary Maintenance Work
Sincerely,
EVANS, MECHWART HAMBLETON TILTON, INC.
Megan F. olf
Environmental Scientist
Enclosure
Copies: Gray Hauser, P.E., DLR
Tim Baumgartner, EEP
Cal Miller, WRC
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