U-5536 Scoping

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October 19, 2018
MEMORANDUM
To: Connie James, NCDOT Division 9 Project Engiileer
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Froni: Dave Wanucha, NC Division of Water Resotn-ces, Winston Salem Regional Offic ��� 10/19/2018
Subject: Scoping comments on proposed improvements to Great Wagon Road from SR 1001 (Shallowford Road)
to SR 1308 (Lewisville-Vienna Road) in Porsyth County. SHPO No. LR 17-1757; Tip Project U-5536.
Reference your correspondence dated October l, 2018 in which you req�lested comments for the referenced project.
Prelimii�ary analysis of tl�e project reveals tl�e potential for multiple impacts to streams and jw-isdictional wetlauds
in the project area. More specifically, impacts to:
Stream Stream Index
Stream Name River Basin 303(d) Listing
Classi�cation(s) Number
Re��n�olds Creek Yadkin Pee Dee C 12-94-9 No
Double Creek Yadkin Pee Dee C 12-87-1-(0.4) No
Ftu-ther investigations at a higher resolution should Ue undertaken to verify the presence of other streains and/or
jtuisdictional wetlands in flle area. ln the event that any j«risdictional areas are identified, the Division of Water
Resources requests tliat NCDOT consider the following environmental issltes for the proposed project:
General Project Commcnts:
The environmental document should }�rovide a detailed and itemized presentation of tl�e propose�d impacts to
wetlands and streams with corresponding mapping. If mitigation is necessary as required by 15A NCAC
2H.0506(h), it is preferable to present a conceptual (if not finalized) mitigation plan wifli the environmental
documentation. Appropriate mitigation plans will be required prior to issuance oFa 401 Water Quality
Certificatioi7.
Enviroml�ental impact statement alternatives shall consider design criteria that reduce the impacts to streams
and wetlands fi-oiT� storm water runoff. These alternatives shall include road designs that allow for treatment
of the storm water runoff through BMPs as detailed in the most recent version of the North Cnrolina
Depar•tnze���t of Trar�sportatior� Storn�iwuter• Best Matiager�zent Practices Tool box manual, such as �-assed
swales, buffer at-eas, prefor-med scour holes, retention basins, etc.
ln accordance witl� fl1e Envu•onmental Management Comnussion's Rules (15A NCAC 2H.0506[l�]),
mitigation will be required for impacts of greater than 3001inear feet to any perennial stream. ln the event
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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

that initigation is required, the i�itigation plan shall be designed to replace appropriate lost fiinciioi�s and
values. The North Caroliva Division of Mitigation Services may be available for assistance with stream
initigation.
4. Future documentarion, including the 401 Water Quality Certificarion Applicarion, shall conrinue to include an
itemized listing of the proposed wetland aild sn•eam impacts witl� corresponding mapping.
5. The NCDWR is very concerned with sediment and erosion impacts that could result from this project. The
NCDOT shall address these concerns by describing the poteiltial impacts that u7ay occur to tl�e aqliatic
environmeuts aud any mitigati»g factors tl�at would reduce tl�e iir�pacts.
6. The NCDOT is re�spectfully reillinded tl�at all impacts, includi»g but not limited to, bridging, fill, excavation
and clearitlg, and rip rap to jurisdictioual wetla�lds, strea��ls, and riparia» buffers need to be included in the
final in�pact calculatioi�s. Tllese impacts, in addition to any consh-uction impacts, te��nporaiy or otherwise,
also neEd to be i�lcluded as part of tl�e 401 Water Quality Cerrification Applic�tion.
7. Sediment and erosion control measures should not be placed in wetlands or streams.
8. Bon-ow/waste areas should avoid wetlands to the maxiinum extent practical. Impacts to wetlands in
bon-ow/waste �reas will nEed to be presented in the 40l Water Quality Certification and could precipitate
compensatory mitigation.
9. The 401 Water Quality Certificltion applicatioi� will need to specifically address the proposed methods for
stormwater managen7eilt. More specifically, stormwater s1�aLl not be peru�itted to disch�rge directly into
streams or surface waters. To meet the reqLiicements of NCDOT's NPDLS permit NCS000250, please refer
to the most reeent version of the North Curoli��a Departrner�t of �Tt•nnspoNt�rtior� StoNm���crter� Best M«ric�gernef�t
Practice.s Toolbox manual for approved measures.
10. Based on the inforn�ation �resent�d in the document, the inagnitude of impacts to wetlands and streains m�y
require a Nationwide (NW) application to tl�e Coips of Engineers and con•esponding 401 Water Qliality
Certification. Please be advised that a 401 Water Quality Certification requires s�tisfactory protection of
water quality to enslire that water quality stanclards are met and no wetland or stream uses are lost. Final
perilut authorizatioil will require the slibmittal of a formal application by the NCDOT ancl written concun•ence
fronl the NCDWR. Please be aware that any approval will be contingent on appro�riate avoidance and
minimization of wetland and sTream impacts to the maximum extent practical, the development of an
acceptable stormwater management plan, aild the inclusion of appropriate mitibation plans where appropriate.
11. If concrete is used during cor�strLiction, a dry work area shall be �naintained 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 potential for elevated pH and possible aquatic life and fish kills. Concrete shall
be handled in accordance with the NPDES Constniction General Pern�it NCGO l 0000.
12. If temporary access roads or detours are constructed, the site shall be graded to its preconstr�ution contours
and elevations. Disturbed aseas s11a11 be seeded or mulcl�ed to stabilize the soil and appropriate native woody
species shall be planted. When using temporary struct�tres, the area sl�all be cleared b�it not gr��bbed.
Clearing the area witb chain saws, mowers, bush-l�oas, or other mechanized equipment and leaving the
st�unps and root mat intact allows the area to re-vegetate nat�ually and mininuzes soil disturbance.
13. Unless otherwise authorized, placement of culverts and other structLn-es 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 for culverts having a diameter less than 48 inches, to allow low flow
passage of water and aquatic life. Design and placement ofi culverts and ott�er structures including tempoi-a�y
erosion control measures shall not be conducted in a manner that may result in dis-equiliUrium of wetlands or
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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

streambeds or banlcs, adjacent to or upstream ai�d downstream of tl�e above struch�res. The applicant is
required to providz evidence that the equilibrium is being maintained if requested in writing by the NCDWR.
If tl�is condition is unable to be met due to bedroc�k or othe�r limiting features encountered during coi�struction,
please contact the NCDWR for guidance on how to proceed and to detennine wl�ether or not a pernlit
modification will be required.
14. lf i�nultiple pipes or ban�els are required, they shall be designed to ivimic nahu�al stream cross secrion as
closely as possiblE including pipes or barrels at flood plain elevation, floodplain benches, and/or sills may be
required where appi•opriate. Widening the stream cl�a»nel should be avoided. Streain cham�el widening at the
inlet or outlet end of stillctm-es typically decreases water velocity causing sediinent deposition that requires
inereased maintenauce and disiupts aquatic life }�assage.
15. If foundation test borings are necessary; it shall be noted in the docun�ent. Geotechnical work is approved
Lmdei- Genera1401 Certification Number 4085/Nationwide Permit No. 6 for Suivey Activities.
16. Sediment and erosion control measures sufficient to protect water resources nnist be implemented and
maintained in accordance with tl�e most recent version of North Carolina Sediment aild Erosion Conh-ol
Planning and Design Manual and the most recent version of NCS000250.
17. All work in or adjacent to strea�n waters shall be conducted in a dry work area. Approved BMP measures
from the most ciu•rent version of the NCDOT Construction and Maintei7ance Activities manual such as
sandbags, rock berms, cofferdan7s and other diversion structLires shall be used to prevent excavation in
flowing water.
18. While the use of National Wetland Inventory (NWI) maps, NC Coastal Region Evaluatioi� of Wetland
Significance (NGCREWS) maps and soil sLu�vey maps are useful tools, their inherent inaccuraci�s require
tl�at qu�lified personnel perfoi�rn onsite wetland d�lineations prior to pet�nit approval.
19. Heavy equipment should be operated fi•om the banlc rather than in stream cl�annels in order to miniinize
sedimentation and reduce the lil<e;lihood of introducing other pollutants into sh•ea�ns. This equipment shall be
inspected daily and n�aintained to prevent contamination of stuface waters fi-om leaking fi�els, lubricants,
hydraulic fluids, or other toxic materials.
20. Riprap shall not be placed in flle active thalweg channel or placed in the sh•eambed in a manner that prechides
aquatic life passage. Bioengineering boulders or structures should be properly designed, sized and installed.
21. Riparian vegetation (native trees and shr�il�s) shall be preserved to the maxiin�ml extent possible. Riparian
vegetatior� must be reestablished witl�ii� the construction liinits of the project by the end of the growing season
following completion of co»struction.
Th�nk you for requesting our input at this time. The NCDOT is re�ninded that issuance of a 401 Water Qualiry
Certification requires that appropriate n�easures be instituted to ensure that water quality standards are met and
designated uses are not degraded or lost lf you have any qtiestions or requue additional information, please contact
Dave Wanucha at [phone] or dave.wanucha u�ncdem•.gov.
Elech�onic copy only distribution:
Bryan Roden-Reynolds, US Anny Corps of Engineers, Charlotte 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