Bridge 271 - Proposed Bridge Replacement Project

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North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
John E. Skvarla, III
Secretary
, November 12, 2014
MEMORANDUM •
TO: Matthew Jones, P.E., NCDOT Division 9
FROM: Dave Wanucha, NC Division of Water Resources, Winston Salem Regional Office �.�� � S ��_
.,
SUBJECT: Scoping Review of NCDOT's Proposed Bridge Replacement Project: Bridge I�Io. 27l in
Davidson County. W.B.S. No. 17BP.9.R.10
In reply to your correspondence dated October 20, 2014 in which you requested comments for the above referenced
project, the NC Division of Water Resources offers the following comments: '
Project-Specific Comments for Bridge No. 271 Over Lick Creek (WS-IV, Index No. 12-126(4), Davidson
County along the shoreline of the Narrows Reservoir operated by the Yadkin Division of Alcoa Power
Generation, Inc. (FERC No. 2197).
�
If this project is permitted under a Nationwide 3, it is possible that NCDOT will not need written approval from
DWR assuming that permanent impacts are less than 40 linear feet or that temparary or permanent impacts are
less than 1/10 of an acre for wetlands. However, all 24 Conditions of Water Quality Certification No. 3883 will
need to be met.
2. Any anticipated dewatering or access structures necessary for construction of the bridge should be addressed in
the Categorical Exclusion (CE) document. 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.
General Comments Regarding Bridge Replacement Projects
3. NCDWR is very concerned with sediment and erosion impacts that could result from this project. NC DOT
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.
4. If foundation test borings are necessary; it shall be noted in the document. Geotechnical work is approved
under General 401 Certification Number 3883/Nationwide Permit No. 6 for Survey Activities.
5. 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). �
6. If the old bridge is removed, no discharge of bridge material into surface waters is allowed unless otherwise
authorized by the US Army Corp of Engineers. Strict adherence to the Corps of Engineers guidelines for bridge
demolition will be a condition of the 401 Water Quality Certification.
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-` 7: _ Whenever possible, the 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.
8. 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.
9. 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.
10. Bridge supports (bents) shall not be placed in the stream when possible.
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 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.
12. 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.
13. All work in or adjacent to stream waters shall be conducted in a dry work 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.
14. 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.
15. In most cases, the 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 at this time. The DOT 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
Dave Wanucha at (336)-776-9703 or at [e-mail].
Elect►-onic copy only distribution:
John Thomas, US Army Corps of Engineers, Raleigh Field Office
Lyn Hardison, SEPA Coordinator, NCDENR-DEACS
NC Division of Water Resources Raleigh Central Office
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