Bridge No. 171 on SR 1006

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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
November 2 2011
MEMORANDUM
To Pamela Williams NCDOT Transportation Program Management 1595 Mail Service Center
Raleigh NC 27699 1595
From Amy Euliss NC Division of Water Quality Winston Salem Regional Office
Dee Freeman
Secretary
Subject Scoping comments on proposed replacement of bridges in Davidson Forsyth Rowan and Stokes
Counties
Reference your correspondence dated October 19 2011 in which you requested comments for the
referenced projects The NCDWQ offers the following comments
Project Specific Comments
Bridge No 69 SR 1502) over Reedy Creek in Davidson County
*Potential impacts to Reedy Creek and an unnamed tributary (Class C) The UT runs parallel to the
roadway and has failing banks on the road shoulder There is also a small linear wetland perpendicular
to the UT
Bridge No 235 (SR 2255) over Four Mile Branch in Davidson County
*Potential impacts to Four Mile Branch and an unnamed tributary (Class C) No project specific
comments
Bridge No 303 (SR 1790) over Rich Fork in Davidson County
*Potential impacts to Rich Fork and an unnamed tributary (Class C 303d) There is also a large wetland
adjacent to Rich Fork and a water line running parallel to the road and the wetland If the road is
widened we would prefer you to shift away from the large wetland and waterline In addition there is a
small wetland in the agricultural field adjacent to the UT
1 Rich Fork Creek are class C 303(d) waters of the State Rich Fork is on the 303(d) list for impaired
use for aquatic life due to impaired ecological and biological integrity as well as fecal coliform
NCDWQ is very concerned with sediment and erosion impacts that could result from this project
NCDWQ recommends that the most protective sediment and erosion control BMPs be implemented
in accordance with Design Standards in Sensitive Watersheds to reduce the risk of nutrient runoff to
Rich Fork NCDWQ requests that road design plans provide treatment of the storm water runoff
through best management practices as detailed in the most recent version of NCDWQ s Stormwater
Best Management Practices
Bridge No 424 (SR 1243) over NC 8 in Davidson County
*Potential impacts to an unnamed tributary to Abbotts Creek (Class C 303d) The UT to Abbotts creek
runs adjacent to NC 8 and is not expected to be impacted from the bridge replacement
1 Abbotts Creek and its unnamed tributaries are class C 303(d) waters of the State Abbotts Creek is
on the 303(d) list for impaired use for aquatic life due to impaired ecological and biological
North Carolina Division of Water Quality Winston Salem Regional Office
Location 585 Waughtown St Winston Salem North Carolina 27107
Phone [phone] FAX [phone] Customer Service 1877-623 6748
Internet www ncwaterquality org
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integrity as well as copper and turbidity NCDWQ is very concerned with sediment and erosion
impacts that could result from this project NCDWQ recommends that the most protective sediment
and erosion control BMPs be implemented in accordance with Design Standards in Sensitive
Watersheds to reduce the risk of nutrient runoff to Abbotts Creek and its unnamed tributaries
NCDWQ requests that road design plans provide treatment of the storm water runoff through best
management practices as detailed in the most recent version of NCDWQ s Stormwater Best
Management Practices
Bridge No 431 (SR 2205) over Abbotts Creek in Davidson County
*Potential impacts to Abbotts Creek (Class C 303d)
1 Abbotts Creek are class C 303(d) waters of the State Abbotts Creek is on the 303(d) list for
impaired use for aquatic life due to impaired ecological and biological integrity as well as copper
and turbidity NCDWQ is very concerned with sediment and erosion impacts that could result from
this project NCDWQ recommends that the most protective sediment and erosion control BMPs be
implemented in accordance with Design Standards in Sensitive Watersheds to reduce the risk of
nutrient runoff to Abbotts Creek NCDWQ requests that road design plans provide treatment of the
storm water runoff through best management practices as detailed in the most recent version of
NCDWQ s Stormwater Best Management Practices
Bridge No 469 (SR 2183) over North Hamby Creek in Davidson County
*Potential impacts to North Hamby Creek (Class C 303d)
1 North Hamby Creek are class C 303(d) waters of the State North Hamby Creek is on the 303(d)
list for impaired use for aquatic life due to impaired ecological and biological integrity as well as
copper and turbidity NCDWQ is very concerned with sediment and erosion impacts that could
result from this project NCDWQ recommends that the most protective sediment and erosion
control BMPs be implemented in accordance with Design Standards in Sensitive Watersheds to
reduce the risk of nutrient runoff to North Hamby Creek NCDWQ requests that road design plans
provide treatment of the storm water runoff through best management practices as detailed in the
most recent version of NCDWQ s Stormwater Best Management Practices
Bridge No 81 (SR 2705) over Fiddlers Creek in Forsyth County
*Potential impacts to Fiddlers Creek and an unnamed tributary (Class C) No project specific
comments
Bridge No 22(SR 2200) over Grants Creek in Rowan County
*Potential impacts to Grants Creek (Class C) No project specific conditions
Bridge No 76 (SR 1985) over Fourth Creek in Rowan County
*Potential impacts to Fourth Creek (Class C 303d)
1 Fourth Creek are class C 303(d) waters of the State Fourth Creek is on the 303(d) list for impaired
use for aquatic life due to impaired ecological and biological integrity NCDWQ is very concerned
with sediment and erosion impacts that could result from this protect NCDWQ recommends that
the most protective sediment and erosion control BMPs be implemented in accordance with Design
Standards in Sensitive Watersheds to reduce the risk of nutrient runoff to Fourth Creek NCDWQ
requests that road design plans provide treatment of the storm water runoff through best
management practices as detailed in the most recent version of NCDWQ s Stormwater Best
Management Practices
Bridge No 171 (SR 1006) over Crane Creek in Rowan County
*Potential impacts to Crane Creek and two parallel unnamed tributaries (Class C) No project specific
comments
Bridge No 115 (SR 1908) over the Dan River in Stokes County
*Potential impacts to the Dan River (WSIV)

I Bridge deck drains shall not discharge directly into the stream Stormwater should 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 to the maximum extent practicable
General Protect Comments
1 For projects that will be handled through the Low Impact Bridge program proposed impacts
suggest that these projects will be permitted using a Nationwide 3 from the US Army Corps of
Engineers NCDWQ would like to respectively remind NCDOT that WQC 3687 or its most
recent equivalent will also be required NCDOT shall be in compliance with all of its applicable
conditions
2 For projects that will be handled through the Low Impact Bridge program DWQ understands that
these bridges will be replaced using an off site detour if at any time these plans change DWQ
shall be contacted to determine if this project shall remain in the Low Impact Bridge Replacement
process
3 If any of the bridges are replaced with aluminum box culverts the stream width must be maintained
immediately upstream and downstream of the pipe inlet Please consider the use of baffles
floodplain benches and other potential techniques to maintain the stream width
4 Environmental assessment alternatives shall consider design criteria that reduce the impacts to
streams and wetlands from storm water runoff These alternatives shall include road designs that
allow for treatment of the storm water runoff through best management practices as detailed in the
most recent version of NCDWQ Stormwater Best Management Practices such as grassed swales
buffer areas preformed scour holes retention basins etc
Currently proposed impacts will not exceed 150 linear feet of impacts to any single stream
However if at any point in the future the impact totals change then in accordance with the
Environmental Management Commission s Rules 115A NCAC 2H 0506(h)} mitigation will be
required for impacts of greater than 150 linear feet to any single stream In the event that
mitigation is required the mitigation plan shall be designed to replace appropriate lost functions
and values The NC Ecosystem Enhancement Program may be available for use as stream
mitigation
6 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
7 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 Engineers guidelines for
bridge demolition will be a condition of the 401 Water Quality Certification
8 Whenever possible NCDWQ prefers spanning structures Spanning structures usually do not
require work within the stream or grubbing of the streambanks and do not require stream channel
realignment The horizontal and vertical clearances provided by bridges shall allow for wildlife
passage beneath the structure Fish passage and navigation by canoeists and boaters shall not be
blocked Bridge supports (bents) shall not be placed in the stream when possible
9 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

10 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
11 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 the soil and
appropriate native woody species should 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
12 If foundation test borings are necessary it should be noted in the document Geotechnical work is
approved under General 401 Certification Number 3624/Nationwide Permit No 6 for Survey
Activities
13 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
Erosion Control Planning and Design Manual and the most recent version of NCS000250
14 All work in or adjacent to stream waters shall be conducted in a dry 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 should be used to prevent excavation in flowing water
15 Sediment and erosion control measures shall not be placed in wetlands and streams
16 Borrow /waste areas shall avoid wetlands to the maximum extent practical Impacts to wetlands in
borrow /waste areas could precipitate compensatory mitigation
17 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
from leaking fuels lubricants hydraulic fluids or other toxic materials
18 Riprap shall not be placed in the active thalweg channel or placed in the streambed in a manner
that precludes aquatic life passage Bioengmeering boulders or structures should be properly
designed sized and installed
Thank you for requesting our input at this time NCDOT is reminded that issuance of a 401 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 Amy Euliss at [phone]
cc Matthew Jones NCDOT Division 9 Bridge Program Manager
John Thomas US Army Corps of Engineers Raleigh Field Office e copy only
Stephanie Braquet Division 9 Environmental Specialist
Wetlands /401 Transportation Permitting Unit
File Copy