20130918 Ver 6_Draft Modification Letter for U-2525B_20160224

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Transportatfon
January 15, 2016
U.S. Army Corps of Engineers
Raleigh Regulatory Field Office
6508 Falls of the Neuse Road, Suite 120
Raleigh, NC 27609
Attention: Mr. David Bailey
PAT McCRORY
Covernor
NICHOLASJ.TENNYSON
Secremry
Subject: Request for modification to repair and stabilize bank on North Buffalo
Creek stream adjacent to the temporary crossing near Rankin Mill
Road in Guilford County on TIP Number U-2525B , WBS No.
34821.1.1 Division Seven USACE Action ID No. SAW 2005-21386
The North Carolina Department of Transportation (NCDOT) is currently in the
process of constructing a four/six-lane divided facility on new location extending
from the US 70 relocation to SR 2303 (Lawndale Drive) in Greensboro, Guilford
County, North Carolina. The project involves several crossings of streams and
tributaries. Construction of the permanent crossing near Rankin Mill Road required
a temporary crossing for which a modification was received on March 12, 2015.
Likely due to several overtopping events at the temporary crossing, severe bank
erosion has occurred on the downstream side of the temporary crossing.
Compounding this problem, is a wetland located less than twenty feet from the
eroding bank. Considering the rapid rate of bank erosion and the proximity of the
adjacent wetland, NCDOT is proposing to restore the eroded bank by placing large
riprap in the eroded area to help armor the bank against future high flow events and
to prevent further bank erosion.
Repair of the bank will involve the placement of Class VII material (at least 50%
of rock with diameter of 1.5 to 3 ft, 40% with diameter of 2 inches to 1.5 ft and not
more than 10% with less than 2 inches in diameter ) placed at a 1.5 to 1.0 slope
along the eroded bank. Larger rock will placed at the bottom to better anchor the
project with smaller rocic used at the top and to fill in gaps. The height of the riprap
from toe of slope will be approximately eleven feet and the linear width along the
�Nothing Compares��._.
Siate ofNorth Cazolina � Depazhneu[ of TmnspoMdon � Division ofHig6ways, Division 9 RigM1t of Way
I I01 E. Wendover Ave. Suite 20Q G�eensbaro, NC 27405� P. O. Boz 14996, Greenslwro, NC 27415-499G
336334-3515

Transportation
PAT McCRORY
Governor
NICHOLAS J. TENNYSON
Secretary
stream will be approximately fifty five feet. Heavy machinery will access the
proposed area of work from the landward side of the stream with no proposed work
in the actual stream. Approved temporary matting will be utilized in all portions of
the wetiand that may be crossed by the heavy machinery with an emphasis on
impacting as little of the wetland as possible.
The proposed work wili result in 605 square feet of permanent impacts for bank
stabilization along North Buffalo Creek and approximately 2000 square feet of
temporary impacts to the adjacent wetlands. Impacts within the buffer have already
been accounted for in the original permit. The length of time expected to complete
the project is three to five days.
Application is hereby made for a modification to the Department of the Army
Section 404 Nationwide Permits and NCDENR-DWQ Section 401 Water Quality
Certification (WQC). We are submitting drawings showing the amount of impacts
and outlining the amount of impacts. The NCDOT will comply with all applicable
NWP and WQC conditions and utilize Best Management Practices during the
construction and removal of the project. If you have any questions or need
additional information, please contact Jerry Parker at [phone].
cc: NCDENR-DWQ Raleigh
Dave Wanucha, NCDENR-DWQ Winston-Salem
Jerry Parker, NCDOT
Barry Harrington, NCDOT
Brian Smith, NCDOT
PDEA,NCDOT
�Nothing Compares��
Stale o£NoM Caralina � Deparimeut oFTraosportation � Division ofHig6ways, Division 7 Right of Way
I101 E. Weudover Ave. Suita 200, Cnee�sborq NC 27405) P. O. Box 14996, Gaensborq NC 274I5-0996
3363343575

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SEE SHEETS 5-173 )FiAU 5-293 FOR STRUCTURE