20141237 Ver 1_Scoping Comments_20101206

STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
BEVERLY EAVES PERDUE
GOVERNOR
December 2, 2010
John Hennessy
DENR - Division of Water Quality
1650 Mail Service Center
Raleigh, NC 27699 - 1621
Dear John Hennessy:
EUGENE A. CON
SECRETARY
SUBJECT: TIP Project No. B-4681; Replacement of Bridge No. 119 on SR 1531
over Little Contentnea Creek in Wilson County
The Project Development and Environmental Analysis Branch is in the process of project
development, environmental and engineering studies for the replacement of Bridge
No. 119 in Wilson County. This project is included in the North Carolina State
Transportation Improvement Program.
We would appreciate any information you might have that would be helpful in evaluating
potential environmental impacts of the project including recommendation of alternates to
be studied. Your comments will be used in the preparation of a federally funded
Categorical Exclusion, prepared in accordance with the National Environmental Policy
Act. It is desirable that your agency respond by March 31, 2011 so that your comments
can be used in the selection of alternatives to be studied for this project.
If you have any questions concerning this project, please contact me at [phone].
Please include the TIP Project Number in all correspondence and comments.
Sincerely,

Tracy Walter
Bridge Project Planning Engineer
Project Development and Environmental
Analysis Branch
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
NC DEPARTMENT OF TRANSPORTATION FAX: [phone] PDEA ENVIRONMENTAL RESOURCE CENTER
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS 4701 ATLANTIC AVENUE - SUITE 116
BRIDGE PROJECT DEVELOPMENT UNIT WEBSITE. WWW.NCDOT.ORG RALEIGH NC 27604
1598 MAIL SERVICE CENTER
RALEIGH NC 27699-1598

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NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
1 Governor Director
December 15, 2010
MEMORANDUM
.,,Dee Freeman ~
Secretary
<
TO: Tracy Walter, NCDOT PDEA Bridge Project Planning
FROM: Rob Ridings, NCDWQ Transportation Permitting Uni
SUBJECT: Scoping Review ofNCDOT's Proposed Bridge Replacement Project: B-4681, ..a
Wilson County.
In reply to your correspondence dated received December 6, 2010 in which you requested
comments for the above referenced project, the NCDWQ offers the following comments:
Project-Specific Comments
Bridge No. 119 Over Little Contentnea Creek, Wilson County
1. . Little Contentnea Creek is class C; Sw; NSW; 303(d) impaired waters of the State.
NCDWQ is very concerned with sediment and erosion impacts that could result from this
project. NCDWQ recommends that the most protective sediment and erosion control ,
BMPs be implemented in accordance with Design Standards in Sensitive Watersheds to
reduce the risk of nutrient runoff to Little Contentnea Creek. NCDWQ requests that road
design plans provide treatment of the storm water runoff through best management
practices as detailed in the most recent version ofNCDWQ StormwaterBestManagement
Practices.
2. This project is within the Neuse River Basin. Riparian buffer impacts shall be avoided and
minimized to the greatest extent possible pursuant to 15A NCAC 2B.0233.
3. Any anticipated bank stabilization associated with the bridge replacement or with culvert
installations and/or extensions should be addressed in the Categorical Exclusion (CE)
document. It is understood that final designs are not determined at the time the CE is
developed. However, the CE should discuss the potential for bank stabilization necessary.
4. Any anticipated dewatering or access structures necessary for construction of bridges
should be addressed'in the CE. It is understood that final designs are not determined at
the time the CE is developed. However, the CE should discuss the potential for dewatering
and access measures necessary due to bridge construction.
General Comments Regarding Bridge Replacement Projects
1. NCDWQ is very concerned with sediment and erosion impacts that could result from this
project. NCDOT shall address these concerns by describing the potential impacts that
TmnsportaVon Permitting Unit
1650 Mail service Center, Raleigh, North Carolina 27699-1650
(Phone:[phone] FAX: [phone]
Intemet http:Im2o.enr.state.nc.uslncweMnds/ . ,
iAn Equal Opport4nily 1 Afimna6ve Action Employer

NorthCarolina
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I may occur to the aquatic environments and any mitigating factors that would reduce the
i impacts.
2. If foundation test borings are necessary; it shall be noted in the document, Geotechnical
work is approved under General 401 Certification Number 3-687/Nationwide Permit No. 6
for Survey Activities.
I If a bridge is being replaced with a hydraulic conveyance other than another bridge,
NCDWQ believes the use of a Nationwide Permit may be required. Please contact the US
Army Corp of Engineers to determine the required permit(s)-
4
If the old bridge is removed, no discharge of bridge material into surface waters is allowed
unless otherwise authorized by the US ACOE. Strict adherence to the Corps of Engineers
guidelines for bridge demolition will be a condition of the 401 Water Quality Certification.
5. Whenever possible, NCDWQ prefers spanning structures. Spanning structures usually do
not require work within the stream or grubbing of the streambanks and do not require
stream channel realignment. The horizontal and vertical clearances provided by bridges
shall allow for human and wildlife passage beneath the structure. Fish passage and
navigation by canoeists and boaters shall not be blocked. Bridge supports (bents) should
not be placed in the stream when possible.
6. Bridge deck drains shall not discharge directly into the stream. Stormwater shall be
' directed across the bridge and pre-treated through site-appropriate means (grassed
swales, pre-formed scour holes, vegetated buffers, etc.) before entering the stream.
Please refer to the most current version ofNCDWQ's Stormwater Best Management
Practices.
7. If concrete is used during construction, a dry work area shall be maintained to prevent
direct contact between curing concrete and stream water. Water that inadvertently
contacts uncured concrete shall not be discharged to surface waters due to the potential
for elevated pH and possible aquatic life.and fish kills.'
8. If temporary access roads or detours are constructed, the site shall be graded to its
preconstruction contours and elevations. Disturbed areas shall be seeded or mulched to
stabilize the soil and appropriate native woody species shall be planted. When using
temporary structures the area shall be cleared but not grubbed. Clearing the area with
chain saws, mowers, bush-hogs, or other mechanized equipment and leaving the stumps
and root mat intact allows the area to re-vegetate naturally and minimizes soil disturbance.
9. Sediment and erosion control measures sufficient to protect water resources must be
implemented and maintained in accordance with the most recent version of North Carolina
Sediment and Erosion Control Planning and Design Manual and the most recent version of
NCS000250.
10. All work in-or adjacent to stream waters shall be conducted in.a dry work area unless
otherwise approved by NCDWQ. Approved BMP measures from the most current version
of NCDOT Construction and Maintenance Activities manual such as sandbags, rock
berms, cofferdams and other diversion structures shall be used to prevent excavation in
flowing water.
11. Heavy equipment shall-be operated from the bank rather than in stream channels in order
to minimize sedimentation and reduce the likelihood of introducing other pollutants into
streams. This equipment shall be inspected daily and maintained to prevent contamination
of surface waters from leaking fuels, lubricants, hydraulic fluids, or other toxic materials.
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12. In most cases, the NCDWQ prefers the replacement of the existing structure at the same
location with road closure. If road closure is not feasible, a temporary detodr shall be
designed and located to avoid wetland impacts, minimize the need for clearing and to
avoid destabilizing stream banks. If the structure will be on a new alignment, the old
structure shall be removed and the approach fdls removed from the 100-year floodplain.
Approach fills shall be removed and restored to the natural ground elevation. The area
shall be stabilized with grass and planted with native tree species. Tall fescue shall not be
used in riparian areas.
General Comments if Replacing the Bridge with a Culvert
Placement of culverts and other structures in waters, streams, and wetlands shall be below
the elevation of the streambed by one foot for all culverts with a diameter greater than 48
inches, and 20 percent of the culvert diameter for culverts having a diameter less than 48
inches, to allow low flow passage of water and aquatic life. Design and placement of
culverts and other structures including temporary erosion control measures shall not be
conducted in a manner that may result in dis-equilibrium of wetlands or streambeds or
banks, adjacent to or upstream and down stream of the above structures. The applicant is
required to provide evidence that the equilibrium is being maintained if requested in writing
by NCDWQ. If this condition is unable to be met due to bedrock or other limiting features
encountered during construction, please contact the NCDWQ for guidance on how to
proceed and to determine whether or not a permit modification will be required.
If multiple pipes or barrels are required, they shall be designed to mimic natural stream
cross section as closely as possible including pipes or barrels at flood plain elevation,
floodplain benches and/or sills may be required where appropriate. Widening the stream
channel shall be avoided. Stream channel widening at the inlet or outlet end of structures
typically decreases water velocity causing sediment deposition that requires increased
maintenance and disrupts aquatic life passage.
Riprap shall not be placed in the active thalweg channel or placed in the streambed in a
manner that precludes aquatic life passage. Bioengineering boulders or structures shall be
properly designed, sized and installed.
Thank you for requesting our input at this time. NCDOT is reminded that issuance of a 401
Water Quality Certification requires that appropriate measures be instituted to ensure that water
quality standards are met and designated uses are not degraded or lost. If you have any
questions or require additional information, please contact Rob Ridings at 919-807-6403.
cc: Tom Steffens, US Army Corps of Engineers, Washington Field Office
Chad Coggins, Division 4 Environmental Officer
Travis Wilson, NC Wildlife Resources Commission
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