20070221 Ver 1_Information Letter_20070911

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STATE OF NORTH CAROLINA
DEPART~NT OF TRANSPORTATION
MICHAEL F. EASLEY
GOVERNOR
September 4, 2007
U. S. Army Corps of Engineers
Regulatory Field Office
151 Patton Avenue, Room 208
Asheville, NC 28801-5006
ATTN.: Mr. Steve Lund
NCDOT Coordinator
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LYNDO TIPPE ~Cti
SECRETARY
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Subject: Revised Information for Application for Individual Section 404 and
401 permits for TIP U-2510A for the proposed widening of NC 16 (Old
Providence Road) from the SR 2948 REA Road Extension in Union
County to south of I-485 (Charlotte Outer Loop) in Mecklenburg County;
NCDOT Division 10. Federal Project No. STP-16(20), Federal Project
No. 8.1672807, WBS Element 34813.1.1.
Dear Sir:
The North Carolina Department of Transportation (NCDOT) submitted an application for
Individual Section 404 and 401 permits for U-2510A to the respective agencies on
February 2, 2007. On February 22, 2007, Carolina heelsplitter, a federally endangered
mussel, was discovered in Sixmile Creek approximately 3.5 miles downstream of the Site
3 culvert crossing on NC 16. As a result of this discovery, U.S. Fish and Wildlife
(USFWS) requested an Indirect and Cumulative Impacts (ICI) report specifically focused
on Sixmile Creek. This report was submitted to USFWS, the Army Corps of Engineers
and the North Carolina Division of Water Quality on June 7, 2007.
USFWS requested that the proposed ditch on the northwest quadrant of Site 3 be
removed and a scourhole be installed to let the water overflow and filter down through
the floodplain instead of flowing directly into Sixmile Creek. The North Carolina
Division of Water Quality (NCDWQ) approved this design change which will result in no
permanent surface water impacts (revised permit drawing and roadway plan sheet
attached). USFWS also requested a construction sequence for Site 3 to verify that the
method of demolition on the existing 4-barrel culvert would not add more sediment to the
stream. The construction sequence for Site 3 is included. Also, at Site 5, a proposed ditch
on the southwest quadrant was eliminated and a 24" pipe is proposed to carry stormwater
MAILING ADDRESS: TELEPHONE: [phone] or LOCATION:
NC DEPARTMENT OP TRANSPORTATION 919-715-1335 PARKER LINCOLN BUILDING
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS 2728 CAPITAL BLVD. SUITE 24O
NATURAL ENVIRONMENT UNIT FAX: [phone] RALEIGH NC 27604
1598 MAIL SERVICE CENTER
RALEIGH NC 27699-1598 WEBSITE: WWW NCDOT.ORG

to a 72" crosspipe that empties into UT to Flat Branch. This design change was also
approved by DWQ (revised permit drawing and roadway plan sheet attached). The design
change at Site 5 will reduce permanent impacts by 12 linear feet.
Concurrence for U-2510A was granted from USFWS for Carolina heelsplitter in a letter
dated August 16, 2007 with the call May Affect; not likely to adversely affect (attached).
Thank you for your assistance with this project. If you have any questions or need
additional information, please contact Mr. Jeffrey Hemphill [phone].
Sincer
~.
~/ Gregory .Thorpe, Ph.D., Environmental Management Director
Project Development and Environmental Analysis Branch
W/attachment
Mr. John Hennessy, NCDWQ (5 Copies)
Ms. Marella Buncick, USFWS
Ms. Marla Chambers, NCWRC
Ms. Kathy Matthews, USEPA -Whittier, NC
Mr. Ronald Mikulak, USEPA -Atlanta, GA
Mr. Clarence W. Coleman, P.E., FHWA
Mr. David Chang, P.E., Hydraulics
Mr. Greg Perfetti, P.E., Structure Design
Mr. Mark Staley, Roadside Environmental
Mr. Barry Moose, P.E., Division Engineer
Mr. Larry Thompson, DEO
W/o attachment
Mr. Jay Bennett, P.E., Roadway Design
Mr. Majed Alghandour, P.E., Programming and TIP
Mr. Art McMillan, P.E., Highway Design
Mr. Scott McLendon, USAGE, Wilmington
Ms. Beth Harmon, EEP
Mr. Todd Jones, NCDOT External Audit Branch
Mr. Carl Goode, PE
Mr. Wayne A. Jacas, PDEA

RECEIVEf~
Division of Highways
United States Department of the Interior
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AUG 28 2007
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PDEA-OFFICE G, ~,,,,~,,:;~ _';nA
FISH AND WII.DLIFE SERVICE
Asheville Field Office
160 Zillicoa Street
Asheville, North Carolina 28801
AUG 21 2007
Preconstn;ctwn
Project Development and
Environmental Analysis Branch
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August 16, 2007
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Dr. Gregory J. Thorpe, Manager
Project Development and Environmental Analysis Branch
North Carolina Department of Transportation
1548 Mail Service Center
Raleigh, North Carolina 27699-1548
Dear Dr. Thorpe:
*~FYI
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Subject: Endangered Species Concurrence for TIP Project No. U-2510A, Improvements to NC 16
(Old Providence Road) in Union and Mecklenburg Counties, North Carolina, Federal
Project No. 8.1672807, Federal Aid Project No. STP-16(20)
We have reviewed your concurrence request and the protective measures proposed for
implementation of the subject project. The following comments are provided in accordance with the
provisions of section 7 of the Endangered Species Act of 1973, as amended (16 U.S.C. 1531-1543)
(Act).
The North Carolina Department of Transportation proposes to improve NC 16 (Old Providence
Road) from South of SR 1316 (Marvin-Weddington Road) in Union County to South of I-485
(Charlotte Outer Loop) in Mecklenburg County, a length of 3.1 miles. The proposed project crosses
Sixmile Creek and two intermittent tributaries. The existing culvert on Sixmile Creek will be
replaced with a bride.
In our November 17, 2005, letter regarding this project, we concurred with a "not likely to adversely
affect" determination for impacts to the federally endangered Carolina heelsplitter (Lasmigona
decorata) mussel. Subsequently, on March 14, 2006, the Carolina heelsplitter was discovered (six
individuals) in Sixmile Creek in Lancaster County, South Carolina, south of the North Carolina state
line and approximately 10 miles downstream of the Sixmile Creek crossing of NC 16. Before this
discovery, the range of the Carolina heelsplitter in North Carolina included Waxhaw, Goose, and
Duck Creeks in Union and Mecklenburg Counties.
During a February 2007 survey of Sixmile Creek in North Carolina (for a potential mitigation
project), Carolina heelsplitter individuals were found approximately 4 miles downstream of the
crossing of NC 16. In 2004 and 2006, surveys of Sixmile Creek in the direct project impact area
found no heelsplitters or shells. On March 8, 2007, a site meeting was convened to discuss specific
minimization measures for the culvert removal and bridge construction on Sixmile Creek. A number

of minimization measures regarding construction were identified and agreed to. In addition, we
requested that an updated Indirect and Cumulative Effects (ICE) analysis be conducted.
Your letter requesting concurrence outlines the minimization measures agreed to for the direct
impacts of construction at the crossing of Sixmile Creek and more stringent measures to control
sediment and erosion for the entire 3.1-mile-long project. The results of the updated ICE analysis
indicate that the growth of subdivisions and related services has continued since the first analysis and
that the area is being served with the existing infrastructure. The improvements that will occur as a
result of the subject project will enable faster, safer travel through the area but will induce little
further growth. Future construction and reconstruction projects will be required to conform to new
National Pollutant Discharge Elimination System (NPDES) Phase II requirements, which, in the
Sixmile Creek watershed, mandate 100-foot intermittent buffers and 200-foot perennial buffers and
storm-water controls that will help protect Sixmile Creek from further degradation.
Given (1) the measures that will be implemented to minimize direct impacts at the crossing of
Sixmile Creek, (2) the negative survey results in the project area, and (3) the requirements of NPDES
Phase II for future construction projects, we concur with your conclusion that the implementation of
this project is "not likely to adversely affect" the Carolina heelsplitter. In view of this, we believe the
requirements under section 7(c) of the Act are fulfilled for this species. However, obligations under
section 7 of the Act must be reconsidered if: (1) new information reveals impacts of this identified
action that may affect listed species or critical habitat in a manner not previously considered, (2) this
action is subsequently modified in a manner that was not considered in this review, or (3) a new
species is listed or critical habitat is determined that maybe affected by the identified action.
If you have questions about these comments, please contact Ms. Marella Buncick of our staff at
828/258-3939, Ext. 237. In any future correspondence concerning this project, please reference our
Log Number 4-2-03-064.
--SinCe~ely, ~~
~__ ~~,~
Brian P. Cole
Field Supervisor
cc:
Ms. Marla J. Chambers, Western NCDOT Permit Coordinator, North Carolina Wildlife Resources
Commission, 12275 Swift Road, Oakboro, NC 28129
Ms. Polly Lespinasse, Mooresville Regional Office, North Carolina Division of Water Quality,
610 East Center Avenue, Suite 301, Mooresville, NC 28115
Mr. Steve Lund, Asheville Regulatory Field Office, U.S. Army Corps of Engineers, 151 Patton
Avenue, Room 208, Asheville, NC 28801-5006
Mr. Chris Militscher, c/o Federal Highway Administration, U.S. Environmental Protection Agency,
310 New Bern Avenue, Room 206, Raleigh, NC 27601

U-2510A
Construction Sequence for Site 3
Construct stage 1 bridge. Construct drilled shafts prior to embankment construction.
Piers can be constructed on crane mats if necessary. No riprap needed for pads. These
mats will be outside the stream.
(assuming looking downstream and barrel #1 is on left side....)
Divert .water into barrel 3 in order to remove sediment from barrel #4. Once this is
complete, divert water into barrel #4 with impervious dikes. Impervious dikes will need
to be constructed underneath the newly constructed stage 1 bridge. Sheet piles will not
be an option. Cannot drive sheets for dikes prior to stage 1 construction because of trying
to minimize diversion period and removal of sheets will be required. Can't remove sheet
piles under new bridge.
With stream diverted into barrel #4, remove roof slab and walls for barrels 1-3.
"Beating" down will be more easily contained than sawing due to difficulty in containing
saw slurry. Keep both walls up for barrel #4.
Once barrels 1-3 roof slab and walls are removed (leaving floorslab), we will construct
the "typical section" through the length of the removed culvert, flood benches, etc. using
stockpiled material from barrel cleanout. Once acceptable channel section is constructed,
divert water from barrel #4 to new channel side, between new channel bank and newly
constructed impervious dike (through culvert length) to contain stream flow outside of
barrel#4. Once water is diverted out of barrel #4, remove roof slab and walls for barrel 4
allowing construction of bank section. Remove impervious dike placing stream into new
fully constructed channel (same channel dimensions as existing upstream/downstream
channel). -
Finish stage 2 bridge over stream.
Impervious dike will most likely be barrier rail, sand bags, or other nonerodables. Newly
constructed banks could be armored with riprap at and above water elevation. With
bridge this wide, vegetative cover on streambanks will not be feasible.
Preconstruction meeting prior to impacts to stream with all permitting agencies.

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