20090828 Ver 2_More Info Letter_20101005

NCDEE R
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Division of Water Quality
Coleen H. Sullins
Director
Dee Freeman
Secretary
October 5, 2010
Steve Smith, Interim Town Manager
Town of Banner Elk
200 Park Ave
Banner Elk, NC 28604
Subject: Request for More Information
401 Water Quality Certification
Shawneehaw Stream Restoration Permit Modification and Revision
DWQ Project # 09-0828 V2
Avery County
Response deadline: November 8, 2010
Dear Mr. Smith:
The Division of Water Quality (DWQ) has performed a preliminary review of a Pre-Construction Notification
(PCN) Form submitted for the above referenced project. Additional information will be required in order to
complete the review process.
Please provide the following information so that we may continue to review your project.
Additional Information Requested:
1. Existing conditions - Existing conditions data, including, but not limited to, a longitudinal profile,
multiple cross-sectional surveys, pebble counts, dimensionless ratio calculations, BEHI (Bank Erosion
Height Index) analysis, and shear stress analysis for the proposed restoration segment.
2. Reference reach - Reference reach data on which the restoration design is based, including the elements
listed above.
3. Structure details - Detailed plans, showing all structure types, installation techniques and minimum
rock / log dimensions, along with in-situ stabilization techniques. Include discussions regarding
minimum rock sizes, use of filter fabric, etc.
4. Structure Placement and Construction - The project proposes a significant amount of structures to be
located within the restoration reach. Minimal design details have been provided as to how the structures
will help achieve the stated goals of the project. Provide discussion on the following:
Location: 2090 U.S. Highway 70, Swannanoa, North Carolina 28778
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer
NorthCarolina
Naturally
Town of Banner Elk
October 5, 2010
Page 2 of 3
• Considering the proposed log riffle placements are designed at other than perpendicular
to the flow of Shawneehaw Creek, and as flows leave these type structures at a 90 degree
angle to the last structure, how will this not result in an immediate bank destabilization
downstream?
• Considering that each log is to be anchored into the nearest bank (in most cases, in both
banks) necessitating significant stream bank disturbance, how will long term bank
stability be provided for?
• How will aquatic life passage be ensured through these structures?
5. Success Criteria - Submit a monitoring plan, defining the success criteria, which complies with the
Internal Technical Guidance for Stream Work in North Carolina, which can be downloaded at:
http://portal.ncdenr.org/c/document library/get file?uuid=56bd6172-2331-43dc-99a4-
a5895148bb27&groupId=38364 ).
Please provide your response in writing to the addresses below prior to close of business on November 8, 2010.
Four copies of the required information should be provided to the 401 Permitting Unit at the following:
Ian McMillan
401 Permitting Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
and a single copy to the Asheville Regional Office at the following:
Linda Wiggs
Surface Water Protection Section
2090 US HWY 70
Swannanoa, NC 28778
If we do not hear from you by the deadline, we will assume that you no longer want to pursue this project and
we will consider the project withdrawn.
Tawn, of Banner Elk
October 5, 2010
Page 3 of 3
This letter only addresses the preliminary application review and does not authorize any impacts to wetlands,
waters or protected buffers. Please be aware that any impacts requested within your application are not
authorized (at this time) by the DWQ. Please call Linda Wiggs 828-296-4653 or Kevin Barnett 828-296-
4657, if you have any questions.
Sincerely,
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Roger C. Edwards, Regional Supervisor
Surface Water Protection
Asheville Regional Office
cc: Tasha McCormick - US Army Corps of Engineers Asheville Field Office
David McHenry - North Carolina Wildlife Resources Commission
Cyndi Karoly - 401 Permitting Unit
County Planning
ARO File copy
Derek Goddard - BREC, P.A.
S:\SWP\Avery\401s\Non-DOT\shawneehaw-banner elk\Addlnfo shawneehawSept2010.KB+CCComments.doc