20150671 Ver 1_Scoping Comments_20110224

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NCDENR FFA 2 /?
North Carolina Department of Environment and Natural Resource9
Division of Water Quality O4Nps µ 0/1
Beverly Eaves Perdue - Coleen H. Sullins S7j?q(r ee Freeman
Governor Director q> ecretary
February 2, 2011
MEMORANDUM
TO: Dionne C. Brown, Bridge Project Planning Engineer, NCDO,T/J
FROM: Michael R. Parker, NCDWQ, Asheville Regional Office #19Q
SUBJECT: Bridge Scoping Review Comments
B-4778 Bridge No. 8, McDowell County
B-5395 Bridge No. 577, Rutherford County
B-5396 Bridge No. 416, Buncombe County
In reply to your letter dated December 20, 2010 in which you requested comments for the above
referenced projects, the NCDWQ offers the following:
Project Specific Comments
B-4778 Bridge No. 8 over Hoppers Creek, McDowell County
1. Hoppers Creek is class C waters of the State.
2. There is a tributary that flows parallel to NCSR 1769 and is behind the sub-station. There appears to
be some wetlands associated with this stream up and downstream of NCSR 1768 which leads off of
NCSR 1769.
2. When doing the site visit it was noted that there is a beaver dam immediately upstream of the bridge.
The McDowell County Bridge Unit has been advised of this beaver dam.
4. There is, a stream restoration site just upstream of this bridge and may be managed by the NC Wildlife
Resources Commission or the NC Ecosystem Enhancement Program.
B-5395 Bridge No. 577 over Hunting Creek, Rutherford County
1. Hunting Creek is class WS•V waters.
2. NCDWQ has no specific comments for this bridge project. intersection of NCSR 1145 and NCSR
1163, on the downstream side of NCSR 1163 adjacent to an unnamed tributary to Pine Creek.
B-5396 Bridge No. 416 over Stony Fork, Buncombe County
1. Stony Fork is classified C-Trout waters. NCDWQ recommends that the most protective sediment and
erosion control BMP's 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 the NC Division
of Land Resources and NC Wildlife Resources Commission.
SURFACE WATER PROTECTION SECTION-Asheville Regional Office One t, 1
2090 U.S. Highway 70, Swannanoa, North Carolina 28778-8211 NOrthCarohna
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10. If foundation test borings are necessary; it shall be noted in the document Geotechniqal work is
approved under General 401 Certification Number 3687/Nationwide Permit No. 6 for Survey
Activities.
11. Whenever possible, NCDWQ 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 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.
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. Strict adherence to the most recent version of NCDOT's Best Management Practices For Bridge
Demolition and Removal approved by the US Army Corps of Engineers is a condition of the 401 Water
Quality Certification.
14. Bridge piles and bents shall be constructed using driven piles (hammer or vibratory) or drilled shaft
construction methods. More specifically, jetting or other methods of pile driving are prohibited without
prior written approval from NCDWQ first.
15. No drill slurry or water that has been in contact with uncured concrete shall be allowed to enter surface
waters. This water shall be captured, treated, and disposed of properly.
16. All pile driving or drilling activities shall be enclosed in turbidity curtains unless otherwise approved by
NCDWQ in this certification.
17. All bridge construction shall be performed from the existing bridge, temporary work bridges, temporary
causeways, or floating or sunken barges. If work conditions require barges, they shall be floated into
position and then sunk. The barges shall not be sunk and then dragged into position. Under no
circumstances should barges be dragged along the bottom of the surface water.
18. All work in or adjacent to stream waters shall be conducted in a dry work area. 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.
19. 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.
20. Heavy equipment shall be operated from the banks rather than in the stream channel in order to
minimize sedimentation and reduce the introduction of other pollutants into the stream. This equipment
shall be inspected daily and maintained to prevent contamination of surface waters from leaking fuels,
lubricants, hydraulic fluids, or other toxic materials.
21. If temporary access roads or detours are constructed, the site shall be graded to its _preconstmction
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