U-6079_DWR Comments

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October 5, 2018
MEMORANDUM
To: Ford Tanner, Transportation Associate, RS&H
From: Dave Wanucha, NC Division of Water Resources, Winston Salem Offic ��� 10/5/2018
S�ibject: Proposed Extension of Martii� Luther King Jr. Drive/West 8`�' Street in Winston Salem, NC;
STIP U-6079; WBS No. 47526.1.1.
Reference your con-espondence dated September 17, 2018 in which you requested comments for the referenced
project. Preliminary analysis of the project reveals tl�e potential for n�ultiple impacts to stt�eams and jurisdictional
wetlands in thc project area. More specifically, impacts to:
Stream Name River Basin Stream Stream index Number 303(d) Listing
Classification(s)
Peters Creek Yadkin Pee Dee C 12-94-12-8 No
Ftu�ther investigations at a higher resolution sholild be undertaken to verify the presence of ofller streams and/or
jtuisdictional wetlands in flle area. lf any,jurisdictional areas are identiiied, the Division of Water Resources
requests that NCDOT and their consultants consider the following envirorunental issues for fl1e proposed project.
General Project Comments:
Further enviromilental docuinents should provide a detailed and itemized presentation of the proposed impacts
to wetlands and streams wifl� corresponding mapping. lf mitigation is necessaiy as required by 15A NCAC
2H.0506(h), it is preferable to present a concephial (if ilot finalized) initigation plan with the enviroiunental
documentation. Appropriate mitigation plans will be required prior to issuance of a 401 Water Quality
Certification.
In accordance with the Environmental Management Commission's Rules (15A NCAC 2H.0506[h]),
mitigation will be required for impacts of greater than 300 linear feet to any perennial sri-eam. In the event
that mitigation is required, the mitigation plan shall be designed to replace app�-opriate lost fiinctions and
values. The North Carolina Division of Mitigation Seivices tnay be available for assistance with strea�n
mitigation.
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North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street I 1617 Mail Service Center � Raleigh, North Carolina 2 7 699-161 7
919.707.9000

3. Future docun�entation, including the 401 Water Quality Certification Application, shall contim►e to incllide an
itemized listing of the proposed wetland and stream impacts with corresponding i7�apping.
4. The NCDWR is very concerned with sedi��lent and erosion im}�acts that could result from this project The
NCDOT shall address these concerns by describing the potential impacts tl�at may occur to the aquaric
environments and any illitigating factors tl�at would reduce the i�npacts.
5. The NCDOT is respectfully reininded that all impacts, including but not limited to, bridging, fill, excavation
and clearitlg, and rip rap to jurisdictioual wetlailds, streams, and riparia» buffers need to be included in the
fina] impact calculations. These ii��pacts, in addition to any construction impacts, temporaiy or otherwise,
also need to be included as part of the 401 Water Quality Certification Application.
6. Wl�enever possible, the NCDWR prefers spanning sh-uctures. Spanning sh-uctures usually do not require
work within tl�e sh•eam or gnlbbing of tl�e streail�banks aud do »ot require streaill chamlel reali�lment. The
horizontal and vertical clearances provided by bridges shall allow for human and wildlife passage beneath the
sh-ucture. Fish p�ssage and ilavigation by canoeists and bo�ters shall not be blocked. Bridge supports (bents)
should not be placed in the stream when possiUle.
7. Sediment and erosion control measures should not be placed in wetlands or streams.
8. Boi7•ow/waste areas should avoid wetlands to the maximtml extent practicaL Impacts to wetlands in
borrow/waste areas will need to be preseilted in the 401 Water Quality Certification and coulcl precipitate
compensatory mitigation.
9. The 401 Water Quality Certification application will need to specifically address the proposed methods for
stonnwater managEment. More specifically, stormwater shall not be permitted to discharge directly into
sh•eams or st�rface waters. To meet the requirements of NCDOT's NPDES pennit NCS000250, please refer
to the most recent version of the North Carolirra Departrner�t of �Tt•nnspoNtatiorr StoN����vuter� Best Mariagernerit
Practice,r Toolbm� manual for approved measures.
10. Based on the inforn��tion presented in the document, the �nagnihide of impacts to wetlands and streams m�y
require a Nationwide (NW) application to the Corps of Engineers and corresponding 401 Water Quality
Certification. Please be advised that a 401 Water Quality Certification requires satisfactory protection of
water quality to ensure that water quality standards are met and no wetland or stream uses are lost. Final
periliit authorizatioil will require the slibmittal of a formal application by the NCDOT ancl written concun•ence
from the NCDWR. Please be aware that any approval will be contingent on appropriate avoidance and.
minimization of wetland and streain impacts to the maximum extent practical, the development of an
acceptable stot7nwater management plan, and the inclLision of appropriate mitigation pl�tns where appro�riate.
11. If concrete is used d�iring constn►ction, a dry work area shall be maintained to prevent direct contact between
curing concrete and strea�r� water. Water that inadvertently contacts uncLired concrete sha11 not be discharged
to surface waters due to the potei�tial for elevated pH and possible aquaric life and fish kills. Co��crete shall
be handled in accordance with the NPDES Construction General Permit NCGO10000.
12. If teinporary access roads or deto�u•s are constructed, the site shall be gradecl to its preconstr�iction contoiirs
and elevations. Disturbed areas shall be seecled or mulcl�ed to stabilize the soil and appropriaee native woody
species shall be planted. When using temporary structures, the area sl�all be cleared but not gruUbed.
Clearing the area with chain saws, mowers, b�ish-l�oas, or other mechanized equipment and leaving the
sri�mps and root mat intact allows the area to re-vegetate naturally and minimizes soil disturUance.
13. Unless otherwise authorized, placement of culverts and other st�lictures in waters and streams shall be placed
below tl�e elevation of the streambed by one foot for all culvei-ts with a diameter greater than 48 inches, and
20 percent of the culvert diameter fior culverts having a diameter less than 48 inches, to allow low tlow
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North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street I 1617 Mail Service Center � Raleigh, North Carolina 27699-1617
919.707.9000

passage of water and aquatic life. Design and placement of culverts and other structurzs including temporary
erosion control n�easures sl�all not be conducted in a manner tl�at may result in dis-equilibriuin of wetlands or
sh-eainbeds or bai�]<s, adjacent to ar upstream aud downsn•eam of the above sn•uctures. Tl�e applicant is
required to provide evidence that the equilibriun� is being maintained ifrequested in writing by the NCDWR.
If this condition is unable to be inet due to bedrock or othe�r limiti��g features encountered during construction,
please contact the NCDWR for guidance on how to proceed and to detei-�liine whether or not a pernlit
modification will be required.
14. If multiple pipes or barrels are re�quired, they shall be desigt�ed to mimic nahu-al strea��� cross section as
closely as possible including pipes or ba�-�-els at flood plain elevation, floodplain beilcl�es, atld/or sills may be
required where appi•opriate. Widening the stream cl�annel should be avoided. Stream cham�el widening at the
inlet or outlet end of shlictures typically decreases water velocity cati�sing sedime�nt deposition that requires
inereased maintenauce and disi�pts aquatic life }�assage.
15. If foundation test borings arE necessaiy; it shall be noted in the document. Geotechnical work is a��proved
tuider General 401 Certification Number 4085/Nationwide Permit No. 6 for Survey Activities.
16. 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 Erosiou Couh•ol
Planiling and Desib Manual and the inost recent version of NCS000250.
17. All worlc in or adjacent to streanl waters sha1L be conducted in a dry work area. Approved BMP nleasures
from fl1e most ciu•rent version of the NCDOT Construction and Maintenance Activities inanLlal such as
sandUags, rock berms, cofferdams and ofller diversion structures shall be used to prevent excavation in
flowing water.
18. Heavy equipment should be operated fi•om the banlc rather than in stream channels in order to minimize
sedimentation and reduce the lil<Elihood of inh-oducing other pollutants into sh•eams. This eqLiipn�e;nt sh�ll be
inspected daily and inaintained to prevEnt contamination of stu�facE waters from le�king fuels, lubricants,
hydraulic fluids, or other toxic matErials.
19. Riprap shall not be placed in flie active thalweg channel or placed in the streaillbed in a n7anner that precludes
aquatic life passage. Bioengineering boulders or structures should be properly designed, sized and installed.
20. Riparian vegetation (native trees and shi�ibs) shall be preserved to the maximum extent possible. Riparian
vegetation m�ist be reestablished witlun the construction limits of the project by the end of the growing season
following completion of constr�iction.
Thank you for rec�uesting our input at this time. The NCDOT is rerninded that issuance of a 401 Water Quality
Certification requires that appropri�te ineasures be instituted to ensure that water quality standards are met and
designated uses are not degraded or lost. if you have any questions or reqLiire additional information, please contact
Dave Wa�nicha �t [phone] or [e-mail].
Electronic copy only distribution:
Bryan Roden Reynolds, US Army Corps of Engineers, Charlotte, NC Field Office
File Copy
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North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street I 1617 Mail Service Center � Raleigh, North Carolina 27699-1617
919.707.9000