Bridge No. 30

NC®ENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H Sullins
Governor Director
May 23 2011
MEMORANDUM
TO Jun Rerko NCDOT Division 6 Environmental Officer Q /_ �/
FROM Belinda Henson NCDWQ Fayetteville Regional Office ttL'V,oGaJ J -��
SUBJECT Scopmg Review ofNCDOT s Pioposed Biidge Replacement Projects BD 5106B and
BD 5106C (Robeson County)
In reply to your coirespondence dated Apiil 28 2011 (received April 29 2011) in which you iequested
comments for the above referenced projects the NCDWQ offers the following comments
Project Specific Comments
BD- 5106B, Bridge No 88 Over Hog Creek, Robeson County
Dee Freeman
Secretary
Hog Creek is designated as C Sw waters and identified by Stream Index Number 14 30 7 Class
C waters are protected for uses such as secondary iecreation fishing wildlife fish consumption
aquatic life including propagation suivival and maintenance of biological integrity and
agiiculture Secondaiy recieation includes wading boating and other uses involving human body
contact with water wheie such activities take place in an infrequent unorganized or incidental
manner The Sw supplemental classification is intended to recognize those waters which have low
velocities and other natural characteristics which aie diffeient fiom adjacent streams
2 Based on field observations a longer bridge would open up the adjacent wetland floodplai n and
provide a substantial benefit to the system Additional length to the North would appear to
provide the greatest benefit
BD 5106C, Bridge No 30 Over Big Swamp, Robeson County
Big Swamp is designated as C Sw wateis and identified by Stieam Index Number 14 22 Class C
wateis aie protected for uses such as Secondaiy iecieation fishing wildlife fish consumption
aquatic life including piopagation survival and maintenance of biological integi ity and
agriculture Secondaiy iecreation includes wading boating and othei uses involving human body
contact with water where such activities take place in an infrequent unorganized of incidental
manner The Sw supplemental classification is intended to iecognize those waters which have low
velocities and other natuial characteristics which are different fiom adjacent stieams
2 Based on field observations expansive wetlands exist on both sides of this stream A longer
bridge would open up the adjacent wetland floodplain and piovide a substantial benefit to the
system
One
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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 desci ibi ng the potential impacts that may occur to the
aquatic environments and any mitigating factors that would reduce the impacts
2 If foundation test borings are necessary it shall be noted in the document Geotechnical work is
approved under General 401 Certification Number 3687/Nattonwide Permit No 6 for Survey
Activities
3 If a bridge is being replaced with a hydraulic conveyance other than another bridge NCDWQ
believes the use of a Nationwide Permit may be requtied Please contact the US Aimy Corp of
Engineers to determine the requned perinit(s)
4 If the old bi idge is removed no discharge of bi idge material into sui face 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
Whenever possible NCDWQ prefers spanning structures Spanning structures usually do not
require work within the sti earn or grubbing of the stre embanks and do not iequire 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 Br idge supports (bents) should not be placed in the stream when possible
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 of
NCDWQ s Stormwater Best Management Practices
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
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 tine 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 tecent 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 wateis shall be conducted in a dry work area unless otherwise
approved by NCDWQ Approved BMP measures from the most current vet stun 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 fiom
leaking fuels lubricants hydraulic fluids or other toxic matei►als

1 /
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 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 shall 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
13 Any anticipated dewatering of 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
14 Any impacts to waters of the state resulting from utility relocations associated with these bridge
replacement projects must be noted in the project document Utility relocations are generally
authorized in accordance with the conditions of General 401 Certification Number 3819/Nationwide
Petmit No 12 for Utility Line Activities
n Y Thank you for requesting oui input at this tune NCDOT is reminded that issuance of a dill 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 Mason Herndon at [phone]
cc Ronnie Smith US Army Corps of Engineers Wilmington Field Office
Clarence Coleman Federal Highway Administration
Greg Burns PE Division 6 Engineer
Chios Militscher Environmental Protection Agency (electronic copy only)
Travis Wilson NC Wildlife Resources Commission (electronic copy only)
Sonia Carullo NCDWQ Central Office
File Copy