Division 7 Bridge Replacement Projects_Let 2018_2019 (4)

Environmental
Quality
February 14, 2018
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Interim Director
MEMORANDUM
TO: Rebecca Jackson, NC Department of Transportation
FROM: April Norton, NC Division of Water Resources, Central Office
SUBJECT: Scoping Review of NCDOT's Proposed Bridge Replacement Project: Bridge 52, Guilford County
In reply to your correspondence dated and received January 26, 2018 in which you requested comments for the above
referenced projects, the NC Division of Water Resources offers the following comments:
Project-Specific Comments:
WBS Element 17BP.7.R.114 — Replace Bridge No. 52 over Deep River on SR 1332, Guilford County
Bridge 52 is within the vicinity of Deep River, classified as WS-IV; CA waters of the State. If potenrial impacts
to these resources are anticipated during the project implementarion, NCDWR requests that NCDOT strictly
adhere to North Carolina regularions 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) classificarions.
Should the bridge project be located within the Critical Area of a Water Supply, NCDOT will 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 NCDWR.
2. This project is within the Randleman River Basin. Riparian buffer impacts shall be avoided and minimized to the
greatest extent possible pursuant to 15A NCAC 2B.0250.
3. If foundation test borings are necessary; it shall be noted in the document. Geotechnical work is approved under
Genera1401 Certificarion Number 4132/Nationwide Permit No. 6 for Survey Activiries.
4. If a bridge is being replaced with a hydraulic conveyance other than another bridge, the NCDWR believes the use
of a Nationwide Permit may be required. Please contact the US Army Corp of Engineers to determine the required
permit(s).
5. If the old bridge is removed, no discharge of bridge material into surface waters is allowed unless otherwise
authorized by the USACE. Strict adherence to the Corps of Engineers guidelines for bridge demolition will be a
condition of the 401 Water Quality Certiiication.
6. Whenever possible, NCDWR prefers spanning structures. Spanning structures usually do not require work within
the stream or grubbing of the stream banks and do not require stream channel realignment. The horizontal and
vertical clearances provided by bridges allow for human and wildlife passage beneath the structure, do not block
fish passage and do not block navigation by canoeists and boaters.
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State of North Carolina I Environmental Quality
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7. 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 NCDWR Stormwater Best Management
Practices.
8. 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.
9. Bridge supports (bents) shall not be placed in the stream when possible.
10. 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.
11. 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.
12. All work in or adjacent to stream waters shall be conducted in a dry wark area unless otherwise approved by the
NCDWR. 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.
13. 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.
14. In most cases, NCDWR 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.
Thank you for requesting our input. NCDOT is reminded that issuance of a 401 Water Quality Cerrification 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 April Norton at (919) 707-
9111 or April.Norton(a�NCDENR�.
Sincerely,
Electronic copy only distribution:
David Bailey, US Army Corps of Engineers, Raleigh Field Office
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