Bridge No. 910114 on SR 1911

A
MC®ER
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H Sullins
Governor Director
November 4 2011
MEMORANDUM
TO Mark W Craig PE Division 5 Bridge Program Manager
FROM Rob Ridings NCDWQ Transportation Permitting Unit Raleigh
SUBJECT Scoping Review ofNCDOT s Proposed Bridge Replacement Projects for Wake and
Franklin Counties
In reply to your correspondence dated received October 28 2011 in which you requested comments for
the above referenced projects the NCDWQ (offers the following comments
Dee Freeman
Secretary
Bridge Number
Stream Name
River Basin &
Subbasin
Stream Classifications
Stream Index
Number
910209
UT to Little River
Neuse 06
WS V NSW
27 57 (8 5)
910420
Little Black Creek
Neuse 04
C NSW
2745 3
910444
UT to Basal Creek
Neuse 03
B NSW
2743 15 3
910114
New Light Creek
Neuse 01
WS IV NSW CA
27 13 (2)
910201
Little River
Neuse 06
WS II HQW NSW CA
27 57 (7 5)
910283
Black Creek
Neuse 04
B NSW
2745 (1)
340003
UT to Horse Creek
Neuse 01
WS IV NSW
27 17 (0 7)
340098
Crooked Creek
Tar Pam 01
C NSW *303(d) Listed*
28 30
340154
UT to Jumping Run
Tar Pam 01
C NSW
2828
340023
Cedar Creek
Tar Pam 01
C NSW *303(d) Listed*
28 29 (2)
340058
UT to Sandy Creek
Tar Pam 02
C NSW +
28 78 1 (14)
340060
UT to Sandy Creek
Tar Pam 02
C NSW +
28 78 1 (14)
Protect Specific Comments
Bridges 910209, 910420, 910444, 910283, 340003, 340154 These projects impact class NSW
waters of the State NCDWQ is very concerned with sediment and erosion impacts that could result
from these projects NCDWQ recommends that highly protective sediment and erosion control
BMPs be implemented to reduce the risk of nutrient runoff to surface waters and 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
2 Bridges 340098 and 340023 These protects impact class 303(d) Listed impaired waters of the
State 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 these streams and their 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
Transportation Permitting Unit
1650 Mail Service Center Raleigh North Carolina 27699 1650
Phone [phone]
Internet http l 1h2o enr state nc uslncvvetlands/
An Equal Opportunity 1 Affirmative Action Employer
NorthCarohna
Naturallff

3 Bridges 910114 and 910201 Review of the project reveals the presence of surface waters
classified as Water Supply Critical Area in the project study area Given the potential for impacts
to these resources during the project implementation the 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 This would apply for any
area that drains to streams having WS CA (Water Supply Critical Area) classifications
Should the bridge project be located within the Critical Area of a Water Supply NCDOT may be
required to design construct and maintain hazardous spill catch basins in the project area The
number of catch basins installed shall be determined by the design of the bridge so that runoff
would enter said basin(s) rather than flowing directly into the stream and in consultation with the
DWQ
4 Bridge 910201 Review of the project reveals the presence of surface waters classified as (HQW)
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
Bridges 340058 and 340060 Review of the projects reveals the presence of surface waters
classified as C NSW + (The plus designation refers to waters directly upstream of Outstanding
Resource Waters or ORW ) The water quality classification of 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 the
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 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
6 Bridges in the Neuse River Basin Riparian buffer impacts shall be avoided and minimized to the
greatest extent possible pursuant to 15A NCAC 2B 0233
Bridges in the Tar Pamlico River Basin Riparian buffer impacts shall be avoided and minimized
to the greatest extent possible pursuant to 15A NCAC 2B 0259
General Comments Regarding Bridge Replacement Protects
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 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)

4 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
5 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) should not be placed in the stream when possible
6 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
8 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 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
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
10 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 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 from
leaking fuels lubricants hydraulic fluids or other toxic materials
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 floodplam 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 dewatermg or 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 dewatermg and access measures
necessary due to bridge construction

General Comments if Replacing the Bridge with a Culvert
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 the NCDWQ for guidance
on how to proceed and to determine whether or not a permit modification will be required
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
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 shall 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 Rob Ridings at 919 807 6403
cc Eric Alsmeyer US Army Corps of Engineers Raleigh Field Office
Chris Murray Division 5 Environmental Officer
Travis Wilson NC Wildlife Resources Commission
File Copy

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VICINITY MAP
NORTH CAROLINA DEPARTMENT OF
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DIVISION OF HIGHWAYS
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WAKE COUNTY
REPLACE BRIDGE NO 910114 ON SR 1911 (MANGUM DAIRY
ROAD) OVER NEWLIGHT CREEK
17BP 5 R 21
Figure 1
Proposed Detour SR 1914 (Garffe
Sherron Road) to SR 1913 (Powell
Road) to SR 1912 (Bold Run Hill
Road)
Detour Length 7 miles
ADT 500 (1998)
Bridges on Detour Bridge No 119
(SV 16 TTST 21)
Cut

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