Bridge No. 88 over Hog Creek

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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 Jim Rerko NCDOT Division 6 Environmental Officer
FROM Belinda Henson NCDWQ Fayetteville Regional Office
SUBJECT Scopmg Review of NCDOT s Pioposed Budge Replacement Projects BD 5106B and
BD 5106C (Robeson County)
In reply to your correspondence dated Aptil 28 2011 (received April 29 2011) in which you requested
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 recreation fishing wildlife fish consumption
aquatic life including propagation survival and maintenance of biological integrity and
agriculture Secondary recreation includes wading boating and other uses involving human body
contact with water where such activities take place in an infrequent unorganized or incidental
manner The Sw supplemental classification is intended to recognize those water s which have low
velocities and other natural characteristics which are different from adjacent streams
2 Based on field observations a longer bridge would open up the adjacent wetland floodplainn 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 waters and identified by Stream Index Number 14 22 Class C
waters ate protected for uses such as secondary recreation fishing wildlife fish consumption
aquatic life including propagation survival and maintenance of biological integrity and
agriculture Secondary recreation includes wading boating and other uses involving human body
contact with water where 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 are different from adjacent streams
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 provide a substantial benefit to the
system
One
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General Comments Regarding Bridge Replacement Projects
NCDWQ is very concerned with sediment and erosion impacts that could result from this project
NCDOT shall address these concerns by describing 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/Nationwide Permit No 6 for Survey
Activities
If a budge is being replaced with a hydraulic conveyance other than another bridge NCDWQ
believes the use of a Nationwide Permit may be requued Please contact the US Aimy Corp of
Engineers to determine the requued permit(s)
If the old bridge is removed no discharge of bridge material into surface waters is allowed unless
otherwise authorized by the US ACOE Strict adherence to the Corps of Engiineeis 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 stream or grubbing of the streambanks 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 boateis shall
not be blocked Bridge 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 aci oss
the bridge and pre treated through site appropriate means (giassed swales pre formed scoui holes
vegetated buffers etc ) before entering the stream Please refei 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 pievent direct contact
between curing concrete and stream water Water that inadvertently contacts uncui ed concrete shall
not be discharged to surface waters due to the potential for elevated pH and possible aquatic life and
fish kills
If ternporary access roads or detours are constructed the site shall be graded to its preconstruction
contouis and elevations Disturbed aieas shall be seeded or mulched to stabilize the soil and
appropiiate native woody species shall be planted When using tempoiaiy structures the aiea 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 recent version of North Caiolma Sediment and Erosion
Control Planning and Design Manual and the most recent version of NCS000250
10 All work in or adjacent to stream waters shall be conducted in a diy work area unless otherwise
approved by NCDWQ 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
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 mater ials

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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 structuies 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 geneially
authorized in accordance with the conditions of General 401 Certification Numbe► 3819/Nationwide
Permit No 12 for Utility Line Activities
Thank you for requesting our input at this tone NCDOT is reminded that issuance of a 491 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
Chi s Militscher Environmental Protection Agency (electronic copy only)
Travis Wilson NC Wildlife Resources Commission (electronic copy only)
Sonia Carrillo NCDWQ Central Office
File Copy