20171172_Div 9 Bridge Scope June_20160608

PAT MCCRORY
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DONALD R. VAN DER VAART
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WaterResources S. JAY ZIMMERMAN
.NVIRONMENTAL OVALITY
Direclur'
June 8, 2016
MEMORANDUM
TO: Stephanie Braquet, NCDOT
FROM: Dave Wanucha, NC Division oF Water Resources, Winston Satem Regional Office 'k�1�v �"��'
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SUBJECT: Scoping Review of NCDOT's Proposed Bridge/Pipe Replacement Projects
In reply to your electronic correspondence dated May 24, 2016 in which you requested comments for the projects
referenced below in Table l, the NC Division of Water Resources offers the following comments:
Table l. Pro'ect descri tions for WBS Pro'ect Number 17BP.9.
Project No. Stream Stream Stream River Basin County 303(d)
Name Index No. Classification
R.70 Lick 12-126-(3) WS-N YPD Davidson 1'es; Benthos
Brid e 31 Creek and Fish
R.68 Flat Swamp 12_�23 C YPD Davidson No
Brid e 55 Creek
R.69 Lick 12-126-(0.5) C YPD Davidson No
Brid e 82 Creek
C.1 UT to Cabin �Z_�2�_�2� WS-IV YPD Davidson No
Pi e 564 Creek
R.46 Dutchman's 12-]02-(2) C YPD Davie No
Brid e 50 Creek
R.71 Hunting 12-108-16- WS-III YPD Davie No
Bridge 78 Creek (0.5)b2
C.2 Ellison 12-8&(0.4) C YPD Forsyth No
Pi e 133 Creek
C.5 Beaverdam 12-108-21-3- C YPD Rowan No
Pipe 59 Creek 3
C.12 Sloans 12-108-21-2- WS-Il; HQW YPD Rowan No
Pi e 69 Creek (0.5)
R.67 Church 12-115.5 C YPD Rowan No
Brid e 152 Creek
R.14 UT to Dutch
Bridge 186 Buffalo Creek �3-17-1 I-(l) WS-1[; HQW YPD Rowan No
C.10 East Fork 13-17-6-1 WS-11� HQW YPD Rowan j'es; Benthos
Pi e 295 Coddle Creek ' and Fish
R.72 Dan 22_�1)b C;Tr ROA Stokes No
Brid e 8 River
C.9 Lynn 22_20-9 C ROA Stokes No
Pi e 107 Branch
C.6 Elk 22_5 C; Tr ROA Stokes No
Pi e 128 Creek
R.41 Lick ZZ_ZS-14 C ROA Stokes No
Bridge 176 Creek
R.73 Little Yadkin 12-77 WS-IV YPD Stokes No
Brid e 286 River
State of NortA Carolina IEnvironmen[al Quality I Water Resources
1617 Mail Service Center, Raleiph, North Carolina 27699-1617

I. Dan River and Elk Creek are Trout (Tr) waters of the State. The NCDWR recommends that the most protective
sediment and erosion control BMPs be implemented to reduce the risk of turbidity violations in trout waters. In
addition, all disturbances within trout buffers shall be conducted in accordance with NC Division of Land
Resources and NC Wildlife Resources Commission requirements.
2. Review of the project reveals the presence of surface waters classified as High Quality Waters (HQW) of the
State in the project study azea. This is one of the highest classifications for water quality. Provided the project
meets the requirements of NCDOT NPDES permit NCS000250, no application for individual State Stormwater
perntit will be required (Streamlining State Stormwater Permitting for NCDOT Projects letter, July 26, 2013).
3. The NCDWR is very concerned with sediment and erosion impacts that could result from this project. NC DOT
shall address these concerns by describing the potential impacts that may occur to the aquatic enviro�unents and
any mitigating factors that would reduce the impacts.
4. If foundation test borings are necessary; it shall be noted in the document. Geotechnical work is approved under
Genera1401 Certification Number 3883/Nationwide Permit No. 6 for Survey Activities.
5. If a bridge is being replaced with a hydraulic conveyance other than another bridge, the NCDWR believes the use
of a Nationwide Permit may be required. Please contact the US Army Corp of Engineers to determine the required
permit(s).
6. If the old bridge is removed, no dischazge 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.
7. Whenever possible, the NCDWR prefers spanning structures. Spanning slructures usually do not require work
within the stream or grubbing of the stream banks and do not require stream channel realignment. T'he
horizontal and vertical clearances provided by bridges allow for human and wildlife passage beneath the
structure, do not block fish passage and do not block navigation by canoeists and boaters.
8. Bridge deck drains shall not discharge directly into the stream. Stormwater shall be d'uected across the bridge
and pre-treated through site-appropriate means (grassed swales, pre-formed scour holes, vegetated buffers, etc.)
before entering the stream. To meet the requirements of NCDOT's NPDES permit NCS0000250, please refer
to the most recent version of the North Carolina Department of Transportation Stormwater Best Management
Practices Toolbox manual for approved measures
9. 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
swface waters due to the potential for elevated pH and possible aquatic life and fish kilis.
10. Bridge supports (bents) shall not be placed in the stream when possible.
I 1. 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 azea 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.
12. 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.
13. All work in or adjacent to stream waters shall be conducted in a dry work area unless otherwise approved by the
NCDWR. 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.
14. 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.
15. In most cases, the NCDWR prefers the replacement of the existing structure at the same locarion with road
closure. If road closure is not feasible, a temporary detour 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 shali be removed and the approach fills 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.
16. 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 wetiands or slreambeds or banks, adjacent to or
upstream and downstream of the above structures. The applicant is required to provide evidence that the
equilibrium is being maintained if requested in writing by the NCDWR. If this condition is unable to be met
due to bedrock or other limiting features encountered during construction, please contact the NCDWR for
guidance on how to proceed and to determine whether or not a permit modification will be required.
17. If multiple pipes or barrels aze required, they shall be designed to mimic natural stream cross section as closely
as possible including pipes or barrels at flood plain elevation and/or sills 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.
18. 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. The DOT 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
Dave Wanucha at [phone] or at [e-mail].
Electronic copy only distribution:
John Thomas, US Army Corps of Engineers, Raleigh Field Office
NC Division of Water Resources Raleigh Central Office
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