20130421 Ver 1_Scoping Comments_20111104

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NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
November 4, 2011
MEMORAINDUM
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 August 10, 2011 in which you requested comments for the
referenced projects. The NCDWQ offers the following comments.
Project Specific Comments:
Bridee No. 122 (SR 1479) over Bit Pine Creek (Crab Creek) in Alleahanv County
*Potential impacts to Big Pine Creek (Crab Creek; Class C -Tr).
Wildlife Resources has noted that no trout are present, so Design Standards in Sensitive Watersheds will
not be required. All disturbances within trout buffers shall be conducted in accordance with NC
Division of Land Resources and NC Wildlife Resources Commission requirements..
Bridge No. 212 (SR 1119) over UT to Glade Creek in Alleghany County
*Potential impacts to an unnamed tributary to Glade Creek (Class C; +; Tr) ) and adjacent wetlands.
1. Wildlife Resources has noted that no trout are present, so Design Standards in Sensitive Watersheds
will not be required. In addition, all disturbances within trout buffers shall be conducted in
accordance with NC Division of Land Resources and NC Wildlife Resources Commission
requirements.
Bridge No. 253 (SR 1332) over UT to Elk Creek (NC portion) in Alleghany County
*Potential impacts to an unnamed tributary to the Elk Creek (NC portion -Class C; +). No project specific
comments.
Bridae No. 260 (SR 1407) over UT to New River (NC portion) in Alleghany County
*Potential impacts to an unnamed tributary to the New River (NC portion -Class C; ORW)
1. Review of the project reveals the presence of surface waters classified as C; Outstanding Resource
Waters of the State in the project study area. The water quality classification of C; ORW is one of
the highest classifications in the State. NCDWQ is extremely concerned with any impacts that may
occur to streams with this classification. It is preferred that these resources be avoided if at all
possible. If it is not possible to avoid these resources, the impacts shall be minimized to the greatest
extent possible. Given the potential for impacts to these resources during the project
implementation, NCDWQ requests that NCDOT strictly adhere to North Carolina regulations
entitled "Design Standards in Sensitive Watersheds" (15A NCAC 04B .0124) throughout design and
construction of the project.
North Carolina Division of Water Quality, Winston -Salem Regional Office
Location: 585 Waughtown St. Winston - Salem, North Carolina 27107
Phone: 336 - 771 -5000 \ FAX: 336 - 771-46301 Customer Service: 1- 877 -623 -6748
Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer
'One
NorthCarohna
Naturallff

Pursuant to 15A NCAC 2H .1006 and 15A NCAC 2B .0224, NCDOT will be required to obtain a
State Stormwater Permit prior to construction except in North Carolina's twenty coastal counties.
Bridge No. 129 (SR 1595) over Nathans Creek in Ashe County
*Potential impacts to Nathans Creek (B; Tr; +) and adjacent wetlands.
1. Wildlife Resources has noted that no trout are present, so Design Standards in Sensitive Watersheds
will not be required. In addition, all disturbances within trout buffers shall be conducted in
accordance with NC Division of Land Resources and NC Wildlife Resources Commission
requirements.
2. A double barrel box culvert was proposed in the field. Flow should be isolated to one barrel with
sills placed in the high flow culvert to restrict flow. Also existing floodplain benches should be
utilized, or floodplain benches should be constructed at the inlet and outlet of the overflow culvert.
Bridge No 264 (SR 1317) over an unnamed tributary to Rich Hill in Ashe County
*Potential impacts to an unnamed tributary to Rich Hill (Class C; Tr; ORW)
1. Review of the project reveals the presence of surface waters classified as C; Outstanding Resource
Waters of the State in the project study area. The water quality classification of C; ORW is one of
the highest classifications in the State. NCDWQ is extremely concerned with any impacts that may
occur to streams with this classification. It is preferred that these resources be avoided if at all
possible. If it is not possible to avoid these resources, the impacts shall be minimized to the greatest
extent possible. Given the potential for impacts to these resources during the project
implementation, NCDWQ requests that NCDOT strictly adhere to North Carolina regulations
entitled "Design Standards in Sensitive Watersheds" (15A NCAC 04B .0124) throughout design and
construction of the project.
2. Pursuant to 15A NCAC 2H .1006 and 15A NCAC 2B .0224, NCDOT will be required to obtain a
State Stormwater Permit prior to construction except in North Carolina's twenty coastal counties.
3. Rich Hill Creek and its unnamed tributaries are class C; Tr; ORW waters of the State. NCDWQ
recommends that the most protective sediment and erosion control BMPs be implemented to reduce
the risk of turbidity violations in trout waters. In addition, all disturbances within trout buffers shall
be conducted in accordance with NC Division of Land Resources and NC Wildlife Resources
Commission requirements.
4. A double barrel box culvert was proposed in the field. Flow should be isolated to one barrel with
sills placed in the high flow culvert to restrict flow. Also existing floodplain benches should be
utilized, or floodplain benches should be constructed at the inlet and outlet of the overflow culvert.
Bridge No 285 (SR 13 10) over Little Laurel in Ashe County
*Potential impacts to Little Laurel (Class C; ORW)
1. Review of the project reveals the presence of surface waters classified as C; Outstanding Resource
Waters of the State in the project study area. The water quality classification of C; ORW is one of
the highest classifications in the State. NCDWQ is extremely concerned with any impacts that may
occur to streams with this classification. It is preferred that these resources be avoided if at all
possible. If it is not possible to avoid these resources, the impacts shall be minimized to the greatest
extent possible. Given the potential for impacts to these resources during the project
implementation, NCDWQ requests that NCDOT strictly adhere to North Carolina regulations
entitled "Design Standards in Sensitive Watersheds" (15A NCAC 04B .0124) throughout design and
construction of the project.
2. Pursuant to 15A NCAC 2H. 1006 and 15A NCAC 2B .0224, NCDOT will be required to obtain a
State Stormwater Permit prior to construction except in North Carolina's twenty coastal counties.
3. A double barrel box culvert was proposed in the field. Flow should be isolated to one barrel with
sills placed in the high flow culvert to restrict flow. Also existing floodplain benches should be
utilized, or floodplain benches should be constructed at the inlet and outlet of the overflow culvert.
Bridge No 322 (SR 1333) over Roaring Branch in Ashe County
*Potential impacts to Roaring Branch (Class C; ORW) and an unnamed tributary.

I . Review of the project reveals the presence of surface waters classified as C; Outstanding Resource
Waters of the State in the project study area. The water quality classification of C; ORW is one of
the highest classifications in the State. NCDWQ is extremely concerned with any impacts that may
occur to streams with this classification. It is preferred that these resources be avoided if at all
possible. If it is not possible to avoid these resources, the impacts shall be minimized to the greatest
extent possible. Given the potential for impacts to these resources during the project
implementation, NCDWQ requests that NCDOT strictly adhere to North Carolina regulations
entitled "Design Standards in Sensitive Watersheds" (15A NCAC 04B .0124) throughout design and
construction of the project.
2. Pursuant to 15A NCAC 2H.1006 and 15A NCAC 2B.0224, NCDOT will be required to obtain a
State Stormwater Permit prior to construction except in North Carolina's twenty coastal counties.
Bridge No. 6 (SR 1559) over the Watauga River in Watauga County
*Potential impacts to the Watauga River (Class B; Tr; HQW).
1. Watauga River are class B; Tr; HQW waters of the State. NCDWQ recommends that the most
protective sediment and erosion control BMPs be implemented to reduce the risk of turbidity
violations in trout waters. In addition, all disturbances within trout buffers shall be conducted in
accordance with NC Division of Land Resources and NC Wildlife Resources Commission
requirements.
2. Review of the project reveals the presence of surface waters classified as Class B; Tr; High Quality
Waters of the State in the project study area. This is one of the highest classifications for water
quality. Pursuant to 15A NCAC 21-1.1006 and 15A NCAC -213 .0224, NCDOT will be required to
obtain a State Stormwater Permit prior to construction except in North Carolina's twenty coastal
counties.
Bridge No. 40 (SR 1301) over Cove Creek in Watauga County
*Potential impacts to Cove Creek (Class C). No project specific comments. Didn't visit.
Bridge No. 79 (SR 1152) over Naked Creek in Wilkes County
*Potential impacts to Naked Creek (Class C). Didn't visit.
Bridge No. 167 (SR 1746) over an UT to Middle Prone Roaring River in Wilkes County
*Potential impacts to an unnamed tributary to Middle Prong Roaring River (Class C). No project
specific comments. Didn't visit.
Bridge No. 319 (SR 1737) over an UT to Double Creek in Wilkes County
*Potential impacts to an unnamed tributary to Double Creek (Class C; Tr). Didn't visit.
1. Double Creek and its unnamed tributaries are class C; Tr; waters of the State. NCDWQ
recommends that the most protective sediment and erosion control BMPs be implemented to reduce
the risk of turbidity violations in trout waters. In addition, all disturbances within trout buffers shall
be conducted in accordance with NC Division of Land Resources and NC Wildlife Resources
Commission requirements.
Bridge No. 363 (SR 1575) over an UT to Buckwheat Branch in Wilkes County
*Potential impacts to an unnamed tributary to Buckwheat Branch (WSII; Tr; HQW). Didn't visit.
1. Buckwheat Branch and its unnamed tributaries are class WSII; Tr; HQW waters of the State.
NCDWQ recommends that the most protective sediment and erosion control BMPs be implemented
to reduce the risk of turbidity violations in trout waters. In addition, all disturbances within trout
buffers shall be conducted in accordance with NC Division of Land Resources and NC Wildlife
Resources Commission requirements.
2. Review of the project reveals the presence of surface waters classified as Class WSII; Tr; High
Quality Waters of the State in the project study area. This is one of the highest classifications for
water quality. Pursuant to 15A NCAC 2H.1006 and 15A NCAC 213 .0224, NCDOT will be -
required to obtain a State Stormwater Permit prior to construction except in North Carolina's twenty
coastal counties.

Bridge No. 367 (SR 1501) over the North Fork Reddies River in Wilkes County
*Potential impacts to the North Fork Reddies River (Class WSII; Tr; HQW) . Didn't visit.
1. North Fork Reddies River are class WSII; Tr; HQW waters of the State. NCDWQ recommends that
the most protective sediment and erosion control BMPs be implemented to reduce the risk of
turbidity violations in trout waters. In addition, all disturbances within trout buffers shall be
conducted in accordance with NC Division of Land Resources and NC Wildlife Resources
Commission requirements.
2. Review of the project reveals the presence of surface waters classified as Class WSII; Tr; High
Quality Waters of the State in the project study area. This is one of the highest classifications for
water quality. Pursuant to 15A NCAC 2H.1006 and 15A NCAC 213 .0224, NCDOT will be
required to obtain a State Stormwater Permit prior to construction except in North Carolina's twenty
coastal counties.
Bridge No. 399 (SR 2474) over an unnamed tributary to Hunting Creek Wilkes County
*Potential impacts to the Yadkin River (Class WS III; 303d -low pH and turbidity). Didn't visit.
1. Hunting Creek and its unnamed tributaries are class WSIII; 303(d) waters of the State. Hunting
Creek and its unnamed tributaries are on the 303(d) list for impaired use for aquatic life due to low
pH 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 Hunting 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 NCD WQ's Stormwater Best Management Practices.
Bridge No. 442 (SR 1501) over an unnamed tributary to North Fork Reddies River Wilkes County
*Potential impacts to an unnamed tributary to North Fork Reddies River (WSII; Tr; HQW). Didn't visit.
1. North Fork Reddies River are class WSII; Tr; HQW waters of the State. NCDWQ recommends that
the most protective sediment and erosion' control BMPs be implemented to reduce the risk of
turbidity violations in trout waters. In addition, all disturbances within trout buffers shall be
conducted in accordance with NC Division of Land Resources and NC Wildlife Resources
Commission requirements.
2. Review of the project reveals the presence of surface waters classified as Class WSII; Tr; High
Quality Waters of the State in the project study area. This is one of the highest classifications for
water quality. Pursuant to 15A NCAC 2H .1006 and 15A NCAC 2B .0224, NCDOT will be
required to obtain a State Stormwater Permit prior to construction except in North Carolina's twenty
coastal counties.
Bridge No. 676 (SR 1561) over Bumgamer Branch in Wilkes County
*Potential impacts to Bumgarner Branch (WSII; Tr; HQW). Didn't visit.
1. Bumgarner Branch are class WSII; Tr; HQW waters of the State. NCDWQ recommends that the
most protective sediment and erosion control BMPs be implemented to reduce the risk of turbidity
violations in trout waters. In addition, all disturbances within trout buffers shall be conducted in
accordance with NC Division of Land Resources and NC Wildlife Resources Commission
requirements.
2. Review of the project reveals the presence of surface waters classified as Class WSII; Tr; High
Quality Waters of the State in the project study area. This is one of the highest classifications for
water quality. Pursuant to 15A NCAC 2H. 1006 and 15A NCAC 2B .0224, NCDOT will be
required to obtain a State Stormwater Permit prior to construction except in North Carolina's twenty
coastal counties.
Bridge No. 732 (SR 2418) over Little Hunting Creek in Wilkes County
*Potential impacts to Little Hunting Creek (WSIII). No project specific comments. Didn't visit.
Bridge No. 736 (SR 1112) over West Prong Moravian Creek in Wilkes County

*Potential impacts to West Prong Moravian Creek (Class C). No project specific conditions. Didn't
visit.
General Project 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.
A
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 {I 5A 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 N 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 sufficientto 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. Bioengineering 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 (336) 771 -4959.
cc: Jamie Guynn, NCDOT Division 11 Bridge Program Manager
Monte Matthews, US Army Corps of Engineers, Raleigh Field Office, e -copy only
Heath Slaughter, Division 11 Environmental Officer
ZD
Wetlands /401 Transportation Permitting Unit
File Copy

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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'
July 14, 2011
MEMORANDUM
To: Matthew Jones, Bridge Program Manager, NCDOT Division 9
From: Amy Euliss. NC Division of Water Quality, Office
Subject: Scoping comments on proposed replacement of Bridge nos.
Dee Freeman
Secretary
Reference your correspondence dated June 24, 2011 in which you requested comments for the referenced
project. The NC Division of Water Quality offers the following comments:
Project Specific Comments:
Bridge no. 134 (SR 1755 ) over Spurgeon Creek in Davidson County
*Potential impacts to Spurgeon Creek (Class WS III); no project specific comments.
Bridge no. 361 (SR 1837) over Leonard Creek in Davidson County
*Potential impacts to Leonard Creek (Class WS III); no project specific comments.
Bridge no. 447 (SR 1454) over Leonard Creek in Davidson County
1. Swearing Creek and its unnamed tributaries are class C; 303(d) waters of the State. Swearing Creek
and its unnamed tributaries are 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 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 Swearing Creek and its unnamed tributaries are. 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. 40 (SR 1940) over Red Bank Creek in Forsyth County
*Potential impacts to Red Bank Creek (Class B); no project specific comments.
Bridge no. 68 (SR 2014) over Right Fork Belews Creek in Forsyth County
* Potential impacts to Right Fork Belews Creek (Class C); no project specific comments.
Bridge no. 145 (SR 1625) over Mill Creek No. 3 in Forsyth County
* Potential impacts to Mill Creek No. 3 (Class C); no project specific comments.
Bridge no. 152 (SR 1137) over Silas Creek in Fors 31h County
* Potential impacts to Silas Belews Creek (Class C); no project specific comments.
North Carolina Division of Water Quality, Winston -Salem Regional Office
Location: 585 Waughtown St. Winston - Salem, North Carolina 27107
Phone: [phone] \ FAX: 336 - 771 -4630 \ Customer Service: 1- 877 -623 -6748
Internet: www.ncwaterquality org
An Equal Opportunity \ Affirmative Action Employer
NorthCarolina
Naturally

Bridge no. 153 (SR 263 1) over Abbotts Creek in Forsyth County
1. Abbotts Creek are class WS I1I; 303(d) waters of the State. Abbotts Creek is on the 303(d) list for
impaired use for aquatic life due to ecological and biological integrity. 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 Stormwater Best Management Practices.
Bridge no. 16 (SR 1771) over Sill's Creek in Rowan County
1. Review of the project reveals the presence of surface waters classified as WS 11; High Quality Waters
of the State in the project study area. This is one of the highest classifications for water quality.
Pursuant to 15A NCAC 2H .1006 and 15A NCAC 2B .0224, NCDOT will be required to obtain a
State Stormwater Permit prior to construction except in North Carolina's twenty coastal counties.
Bridge no. 44 (SR 1983) over Beaver Dam Branch in Rowan Coin
* Potential impacts to Beaver Dam Branch (Class WSN); no project specific comments.
Bridge no. 185 (SR 2320) over UT to Second Creek in Rowan County
1. Second Creek and its unnamed tributaries are class C; 303(d) waters of the State. Second Creek and
its unnamed tributaries is on the 303(d) list for impaired use for aquatic life due to ecological and
biological integrity. 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 Second 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 Stormwater Best Management Practices.
Bridge no. 11 (SR 1155) over First Potts Creek in Davidson County
* Potential impacts to UT to First Potts Creek (Class C); no project specific comments.
Bridge no. 274 (SR 1002) over Lick Creek in Davidson County
1. Lick Creek are class WS N; 303(d) waters of the State. Lick Creek is on the 303(d) list for impaired
use for aquatic life due to ecological and biological integrity. 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 Lick 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 Stormwater Best Management Practices.
Bridge no. 73 (SR 2624) over Abbotts Creek in Forsyth County
1. Abbotts Creek are class WS 1113 03 (d) waters of the State. Abbotts Creek is on the 303(d) list for
impaired use for aquatic life due to ecological and biological integrity. 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 Stormwater Best Management Practices.
Bridge no. 116 (SR 299 1) over Middle Fork Muddy Creek in Forsyth County
1. Middle Fork Muddy 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 ecological and biological integrity. 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

r
Abbotts. 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 Stormwater
Best Management Practices.
Bridge no. 281 (SR 2538) over Town Creek in Rowan County
1. Town Creek are class C;303(d) waters of the State. Town Creek is on the 303(d) list for impaired use
for aquatic life due to ecological and biological integrity. 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 Town 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 Stormwater Best Management Practices.
General Project Comments:
1. Please note some of the classifications listed on the Low Impact Bridge Project data sheet were
incorrect. Please update the list using the classifications listed above.
2. 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.
3. 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 can remain in the Low- Impact
Bridge Replacement process.
4. The environmental document shall provide a detailed and itemized presentation of the proposed
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
with the environmental documentation. Appropriate mitigation plans will be required prior to
issuance of a 401 Water Quality Certification.
5. 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.
6. After the selection of the preferred alternative and prior to an issuance of the 401 Water Quality
Certification, NCDOT is respectfully reminded that they will need to demonstrate the avoidance and
minimization of impacts to wetlands (and streams) to the maximum extent practical. In accordance
with the Environmental Management Commission's Rules { 15A NCAC 2H.0506(h) }, mitigation will
be required for impacts of greater than 1 acre to wetlands. 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 wetland mitigation.
7. In accordance with the Environmental Management Commission's Rules { 15A 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.

V
8. 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.
9. If a bridge is being replaced with a hydraulic conveyance other than another bridge, NCDWQ
believes the use of a Nationwide Permit may be required. Please contact the US Army Corp of
Engineers to determine the required permit(s).
10. 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.
11. 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 human and
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.
12. 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.
13. 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.
14. 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.
15. Placement of culverts and other structures in waters, streams, and wetlands shall be below the
elevation of the streambed by one foot for all culverts 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 of culverts and other structures including
temporary erosion control measures shall not be conducted in a manner that may result in dis-
equilibrium of wetlands or streambeds or banks, adjacent to or upstream and down stream of the
above structures. The applicant is required to provide evidence that the equilibrium is being
maintained if requested in writing by NCDWQ. If this condition is unable to be met due to bedrock
or other limiting features encountered during construction, please contact NCDWQ for guidance on
how to proceed and to determine whether or not a permit modification will be required.
16. If multiple pipes or barrels are required, they shall be designed to mimic natural stream cross section
as closely as possible including pipes or barrels at flood plain elevation, floodplain benches, and /or
sills may be required where appropriate. Widening the stream channel shall be avoided. Stream
channel widening at the inlet or outlet end of structures typically decreases water velocity causing
sediment deposition that requires increased maintenance and disrupts aquatic life passage.

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17. 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.
18. 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.
19. 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.
20. Sediment and erosion control measures shall not be placed in wetlands and streams.
21. Borrow /waste areas shall avoid wetlands to the maximum extent practical. Impacts to wetlands in
borrow /waste areas could precipitate compensatory mitigation.
22. While the use of National Wetland Inventory (NWI) maps, NC Coastal Region Evaluation of Wetland
Significance (NC- CREWS) maps and soil survey maps are useful tools, their inherent inaccuracies
require that qualified personnel perform onsite wetland delineations prior to permit approval.
23. 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.
24. In most cases, NCDWQ prefers the replacement of the existing structure at the same location with
road closure. If road closure is not feasible, a temporary detour should 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 should 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.
25. Riprap shall not be placed in the active thalweg channel or placed in the streambed in a manner that
precludes aquatic life passage. Bioengineering 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 (336) 771 -4959.
cc: John Thomas, US Army Corps of Engineers, Raleigh Field Office
Federal Highway Administration
Kent Boyer, Division 9 Environmental Officer
Chris Militscher, EPA -e -copy

Marla Chambers, NC Wildlife Resources Commission -e -copy
Wetlands F4 0.1= T- ransportatio—i Permifting =Unit
File Copy