20081564 Ver 1_More Info Letter_20081125

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Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
November 25, 2008
DWQ# 08-1564
Guilford County
CERTIFIED MAIL: 7008 0150 0002 7876 8461
RETURN RECEIPT REQUESTED
Mr. Gregg Antemann
Carolina Wetland Services, Inc.
550 E. Westinghouse Blvd
Charlotte, NC 28273
Re: Section 401 Water Quality Certification application for North Fork Estates
Dear Mr. Antemann:
On October 10, 2008, the North Carolina Division of Water Quality (Division) received your application for a 401
General Water Quality Certification to impact 1,524 linear feet of stream to improve flood control for the City of High
Point in Guilford County. Additional information is required in order that we may determine your project's compliance
with 15A NCAC 2H .0500. The Division will require this information in order to process your application to impact
protected wetlands and/or streams on the subject property. Therefore, we will place this project on hold as incomplete
until we receive this additional information, and if we do not receive the additional information requested below, we will
have to move toward denial of your application as required by 15A NCAC 2H .0506. Please provide the following
information so that we may continue to review your project.
1. Please provide documentation that the bottomless arch culvert that is being proposed meets the Division
of Water Quality policy as found in the attached document, and online at:
http://h2o.enr.state.nc.us/ncwetlands/rd_pub-not.html
2. A site visit conducted on November 25, 3008 noted that a power utility line runs parallel to the stream
channel throughout the project boundaries. Traditionally utility companies treat their right-of-ways with
herbicides to limit vegetation growth under the power lines. This would directly conflict with the
proposed stream bank planting for this project. Please provide information that the City has discussed
their proposed planting with the power company and that an agreement has been reached, or revise the
stream bank planting plan as necessary.
3. The Division is concerned that the proposed flood plain bench design includes a riprap lined bank
throughout the entire project on both sides of the stream. A site visit conducted on November 25, 2008
noted that a significant portion of the stream did not show extreme erosion along stream banks. The
addition of a flood plain bench to this area will greatly reduce velocities throughout the channel and
reduce bank shear stress. The Division understands that there may be some areas where shear stress is
high enough to be of significant concern. The Division requests that the design be re-evaluated
regarding the necessity of the riprap. We suggest the use of small riprap sections, riprap aprons or scour
holes for stormwater pipes, and or reducing the slope of the stream bank to less than 2:1 as p>;?posed.
The stream currently establishes benches that show very little erosion. The Division would p? na
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North Carolina Division of Water Quality 585 Waughtown Street Phone [phone] Customer Service
Winston-Salem Regional Office Winston-Salem, NC 27107 Fax [phone]
Internet: www.ncwateraualitLorg
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Mr. Gregg Antemann
November 25, 2008
Page 2
4. Please explain why large trees are being removed along the existing stream bank behind the apartment
complex. It appears that the plan does not require any work in these areas so it is unclear why the trees
are being removed.
5. Please provide a detailed planting plan for the flood plain benches as well as the stream banks. Please
clearly indicate on the plan sheets the areas where each plan will be followed.
6. Per the requirements of the General Certification, all work shall be done "in the dry". Therefore,
dewatering methods will be necessary to temporarily dewater the stream channel during structure
installations. Please provide a construction sequence that details the method of dewatering to be utilized
at the site and the sequence of construction events to be followed to ensure compliance with this
condition.
7. Please clarify what Nationwide Permit the USACE will be issuing for this project.
8. Please provide a new PCN table and plan drawings that clearly label each impact area and identify the
type of impact and the amount of impact. Please note that stream bank work above the high water mark
may not be considered a permitted impact by the USACE.
9. Please provide detailed specifications for the cross vane structures. These details should include details
such as angle of construction, depth of construction, type of material, scour pool, fabric usage etc.
10. Please provide detailed specifications for areas where riprap is to be installed at the stream bank.
Please respond in writing within 30 calendar days of the date of this letter by sending a copy of this information to Sue
Homewood at the address on this letterhead, and a copy to Ian McMillan N. C. Division of Water Quality, Wetlands/401
Certification Unit, 1650 Mail Service Center, Raleigh, NC 27699-1650. If you will not be able to provide the requested
information within that timeffame, please provide written confirmation that you intend to provide the requested
information, and include a specific timetable delineating when the requested materials will be provided. If we do not hear
from you in 30 calendar days, we will assume that you no longer want to pursue this project and we will consider the
project as returned.
This letter only addresses the 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
Division. If you have any questions, please contact me at 336-771-4964 or [e-mail].
Sincerely,
Sue Homewood
DWQ Winston-Salem Regional Office
cc: Andy Williams, U. S. Army Corps of Engineers, Raleigh Regulatory Field Office
Mr. Derrick Boone, City of High Point, PO Box 230, High Point, NC 27261
DWQ Winston-Salem Regional Office
DWQ Wetlands/401 Unit