20191460 Ver 1_BR-0121 Sampson scoping comments Dec 2018_20181206

NOk�iH CARCJLINA
ROY COUPER £nvtronmentof Quoltiy
t:o����in�x
MICI•IAEL S. RGGAN
Srcretnry
LINDA CULPEPPER
fifclfin Ofretfor
December 6, 2018
MEMORANDOM
To: Greg S. Purvis, PB, Project M�mager, Wetherill Engineering .�
From: Joannc Steenhuis, NC Division of Water Resources, Wilmington Regional Office �
Subject Scoping commen[s on proposed replacement of I3ridge No. 810178 over Sevenmile Swamp on SR 1804
(Flouses Mill Rd.) in Sampson Counry, S'I'IP BR-0121.
Reference your correspondence datcd November 29, 2018 in which you requested comments for the referenced
project. Preliminary analysis of the project reveals the potential for impacts to the stream and jurisdictional
wetlands in the project area. More specifically, impacts to:
Stream Name Rivcr I3asin Stresim Classification(s) Strenm Index 303(d) Listing
Nwnber
Sevenmilc Swam Ca e Fear C;Sw 18-68-I-3 N/A
Pwther investigations at a higher resolution should be undertaken to verify the presence of other streams aud/or
jm�isdictional wetlands in the area. In the event that anyjurisdictional arcas are identified, the Division of Water
Resources requests that NCDOT and/or Wetherill Enginccring consider the following emironmental issues for [he
proposed project
Project Specific Commcnts:
I. If net increase in I3UA:
"Co meet the requirements of NCDOT's NPDES pennit NCS000250, the road design plans shall providc
treatment of the stormwater nmoff through BMPs as detailed in the most recent version of the North
C�n�olinn Depni�hnent ofTrnnsportntrori Stornnvnter 6est Manngemenl Pi�ac[ices Toolbo.� manual. The
BMPs should, to the MEP, be selected and designed to reduce impacts of the target pollutants of concern
(POCs) for tl�e receiving waters.
D_EQ�
NC+'��e�1�N1�-.Y�mcfL[ur.�
North Carolina Department of Environmental Quality � Division of Water Resources
512 North Salisbury Street I 1617 Mail Service Center � Raleigh, North Carolina 27699-1617
919.707.9000

General Project Commcnts:
'Che environmental document should provide a detailed znd itemized presenta[ion of the proposed impacts to
wedands and streams with corresponding mapping. If mitigation is necessary as required by I SA NCAC
2H.0506(h), it is prcferable to present a conceptual (if not finalized) mitigation plan wilh the environmental
documentation. Appropriate mitigation plans will be required prior to issuznce of a 401 Water Quality
Certi tication.
2. Environmental impact statement alterna[ives shall consider design criteria lhat reduce the impacts to strcams
and wetlands from storm water runofE 'I'hese alternatives shall includc road designs that allow for trcatment
of the stonn water runoff through [3MPs as detailed in the most recent version of the North Cnr•o[inn
De��artment ofTransportntion Sla�anvaler l3es! A�lanagemen( P��nctices Tool box manual, such as gr�ssed
swales, buffer areas, preformed scow� holes, retenlion basins, etc.
After the selection of the preferred alternative and prior to an issuance of the 401 Water Quality Certification,
the NCDOT is respectfully reminded that they will need to demonslrate the avoidance and minimizalion of
impacts to wetlands (and streams) to the maximum extent practical. In accordance with the Enviroumeutal
Management Commission's 2ules Q SA NCAC 2H.0506[h]), mitigation will be required for impacts of
greater than I acre to wetlands. fn the event that mitigation is required, the mitigation plan shall be designed
to replace appropriate lost functions and vzlues. North Carolina Division of Mi[igation Scrvices may be
aveilable for assistance with wetlTnd mitigation.
4. In accordance with the Gnvi�ronmental Management Commission's Rules ( I SA NCAC 2H.0506[h]),
mitigation will be required for impacts of greater than 300 lincar fcet to any perennial stream. hi the event
that mitigation is required, the mitigation plan shall be designed to replace appropriate lost fimctions and
values. The North Carolina Division of Mi[igation Services may be available for assistance wi[h streain
mitigntion.
5. Future documentation, including [he 401 Water Quality Certification Application, shall continue to include an
itemized Iisting of the proposed wetland and stream impacts with corresponding mapping.
6. The NCDWR is very concerned wi[h sedimen[ and erosion impacts [hat coidd result from tliis project. The
NCDOT shall address these concerns by describing the poten�ial impacts that may occur to the aquatic
environments and any mitigating factors that would reduce the impaets.
7. Au analysis of cumulative nnd secondary impac[s anticipated as a result of tliis project is required. The type
and detail of analysis shnll conform lo tlie NC Division of Water Resow'ce Policy on the assessment of
secondary and cunudative impac[s daled April lQ 2004.
8. The NCDOT is respectfiilly reminded that all impac[s, including but not limited to, bridging, till, excavation
and clearing, and rip rap to jurisdictional wetlands, streams, and riparian buffers need [o be included in the
final impact calculations. "fhese impzcts, in addition to a�ry construction impects, tempora�y or otherwise,
also need to be included as part of the 401 Water Qualiry Cer[ifica[ion Application.
ri��:��;:.� D E Q�,�
North Carolina Department of Environmental Qualiry I Division of Water Resowces
512 Nm[h Salisbury Stree[ � 1617 Mail Service Center � Raleigh, North Carolina 27699-1617
919.707.9000

9. Where streams must be crossed, [he NCD W R prefers bridges be used in lieu of culverts. However, we realize
that economic considera[ions often require the use of culverts. Please be advised Ihat culverts should be
counte�sunk to allow uuimpeded passage by fish and other aquatic organisms. Moreover, in areas where high
qualiry wetl�nds or streams �re impacted, a bridge may prove preCerable. When applicable, the NCDOT
should not install the bridge bents in the creek, to the maximum extent practicable.
10. Whenever possiblq �hc NCD W R prefers spanning structures. Spnnning strucltu'es usually do not require
work within the stream or grubbing of the streambanks and do not require slrcam channel realignment. "Che
horizon[al and ver[ical clearances provided by bridges shall allow for human and wildlife passage beneath the
structure. Fish passage and navigation by eznoeists and boaters shall not be blocked. Bridge supports (bents)
should uot be placed in [he stream when possible.
I 1. [3ridge deck drains shall not discharge directly in[o [hc s[ream. S[ormwa[er shall be directed across the bridge
nnd pre-treated through site-appropriatc mcans (grasscd swales, pre-formed scoin� holes, vcge[ated buCfers, e[c.)
before entering the streant To mect thc requiremen[s of NCDO'I"s NPDLS pennit NCS000250, plcase refer
to lhe ntost recent version of the Nor(h Cm�olrnn Deym�mient of'!'i�nnsporla[ian Stornnvater 6est Mm�agement
Prnctices Toolbox manual for approved measures.
12. Sediment and erosion control measures should not be placed in wetlands or streams.
13. Borrow/waste areas should avoid wetlands to the maximum extent praetical. Impacts to wetlands in
borrow/waste arcas will necd [o be presented in Ihe 401 Water Quality Certification and wuld precipita[e
compens�tory mi[igation.
14. The 401 Water Quality Certification applicalion will need to specifically address the proposecl metliods for
stormwater mnnagement. More specifically, stonnwater shall not be permitted to discharge directly in[o
sUeams or surface waters. To mcet thc requirements of NCDO'I"s NPDES permit NCS00025Q pleasc refer
to the most recent version of the Narth Ccrrolinn Depnrtment of'!'r�ansporla(ion Star�invnter 6est Mancrgement
Prac[ices Toolbos manual for approved measures.
I5. The DWR cannot comment on permit requirements with the litnited infonnation provided. Detailed field
delineation is required to determine the presence or absence of jurisdictional resources within the project
limits. In addition, NCDO"1' must provide an estimate to any resources located within the construction limits
of the project area before we can specifically comment on NCDWR permiL eligibility. Final permit
authorization will require the submittal of a formal application by the NCDO"C and written concurrence Crom
H�e NCDWR. Please be aware that any approval will be contingen[ on appropriate avoidance and
minimization of wetland and stream impacts to the maximum extent practical, the development of an
acceptable stormwater management plan, and Ihe inclusion of appropriate mitigation plans where appropriate.
16. If concrete is used during construc[ion, a dry work area shall be maintained to prevent direc[ contact between
cw�ing concrete and stream water. Water that inadvertently contacts uncurcd concrete shall 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 wi[h the NPD�;S Construction General Permil NCGO10000.
17. If temporary access roads or detours are constructed, lhe site shall be graded to its preconstruction contours
nnd elevations. Disturbed areas shall be seeded or mulched to stabilize the soil and appropria[e native woody
species shall be planted. When using temporary structures the area shall be cleared but not grubbed. Clearing
tl�e area wiN� chain saws, mowers, bush-hogs, or other mechanized equipment and Ieaving [he stumps and root
mat intact allows the area to re-vegetate naturally and minimizes soil disturbance.
���:����:.Y..D_.^ Q�,�
North Carolina Departnent of Environmental Qualiry I Division of Water Resources
512 North Salisbury SVeet � 1617 Mail Service Cen[er I Raleigh, North Cawlina 27699-16ll
919.707.9000

I8. Unless otl�erwise aulhoriud, placemen[ of culverts and other structures in wa[ers and streams shtill be placed
below the elevalion of the streambed by one foot for all culver[s wi�h a diameter greater than 48 inches, and
20 percmll of the culvert diameter for culveits having a diameter less than 48 inches, to allow low flow
passage of wa[er and aquatic life. Design tind placement of culver[s and other structures including temporary
erosiou con[rol measures shall not be conducted in a manner [hat may result in dis-equilibriwn of wetlands or
streambeds or banks, adjacent [o or upstream and downsh'eam of Ihe above structures. 'fhe applicant is
required to provide evidenw that �he equilibrium is being maintained if requested in wri[ing by the NCDWR.
If Ihis condition is unable to be met due to bedrock or other limiting features encountered dm'ing construction,
please contact the NCDWR for guidance on how to proceed and to determine whe[her or not a permit
modification will be required.
19. If multiple pipes or ba�rels are required, they shall be designed to mimic natw�al stream cross section as
closely as possible including pipes or barrels at Flood plain elevation, lloodplain benches, and/or sills may be
required where appropriata Widcning the stream channel should be avoided. Stream channel widening at Ihc
inlet or outlet end of structures typically decreases water velociry causing sediment deposition Ihat requires
increased maintenance and disrupts aquatic life passage.
20. If foundation test borings are necessary; it shall be noted in the documenL Geotechnical work is approved
under General 401 Certification Number 4085/Nationwide Permit No. 6 for Survey Activities.
2 L Sediment and erosion con[rol measw�es sufficient to protect wa[er resources must be implemenled and
maintained in accordance with the most recen[ version oCNor[h Carolina Sediment and Erosion Conlrol
Planning and Design Manual and the most recent version of NCS000250.
22. All work in or adjacent ro stream wa[ers shall be conducted in a dry work area. Approved I3MP measures
fi'om the most current version of the NCDO"f Construction and Maintenance Activities manual such as
sandbags, rock berms, wfferdams and other diversion sh�uctures shall be used to prevent excavation in
flowing watcr.
23. While the use of N�tional Wetland Inventory (N WO maps, NC Coastal Region Evaluation of Wetland
Significznce (NGCREWS) maps and soil smvey maps are usefid tools, Iheir inherent inaccuracies require
that qualified personnel perform onsite wctland delineations prior to permit approval.
24. Heavy equipmen[ shoulcl be operated from [he bank rathcr than in stream channels in order to minimi�c
sedimeutation and reduce the likelihood of inlroducing other pollutants into streams. This equipment shall be
inspected daily and maintained to prevent contamina[ion of surface waters from leaking fuels, lubricants,
hydraulic fluids, or other toxic materials.
25. Riprap shall not be placed in the active thalweg channel or placed in tl�e streambed in a manner that precludes
aquatic life passage. Qioengineering bouldcrs or s[ructures should be properly dcsigned, sized and installed.
26. Riparian vegetation (native trees and shrubs) shall be preserved to the maxiuwm extent possible. Riparian
vegetation must be rcestablished within the construction limits of the project by the end of the growing scason
following cotnpl¢tion oPconstruction.
ti9.�::�a;::� ��.�
North Carolina Department of Environmental Qualiry I Division of Water Resources
512 North Salisbury Street � 1617 Mail Service Center � Raleigh, North Carolina 2769916ll
919]07.9000

Thank you for requesting ow� input at this time. The NCDOT is reminded that issuznce of a 401 Waler Quaiity
Certifica[iou requires that appropriate measures Ue instituted to eusure tliat water quality standards are met and
designated uses are not degraded or lost If you have any questions or require additional infonna[ion, please contact
Joanne Steenhuisa[[phone] orjoanne.stcenhuis��ncdencgov.
Cleclronic copy only distribu[ion:
Mason I lerndon, Gnvironmen[al Program Supeivisor, NC DOT Division 3
Brad Shaver, US Army Corps of Engineers, Wilmington Field Office
Kristi Lynn Carpenter, NCDWR
Pile Copy
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North Carolina Departmen[ of Environmental Quality � Division of Water Resources
512 North Salisbury Stree[ � 1617 Mail Service Center � Raleigh, North Carolina 27699-1617
919.707.9000