20071995 Ver 1_More Info Letter_20081119

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 19, 2008
DWQ# 07-1995
Guilford County
CERTIFIED MAIL: 7008 0150 0002 7876 7662
RETURN RECEIPT REQUESTED
Mr. Keith Pugh
City of High Point
PO Box 230
High Point, NC 27261
Re: Section 401 Water Quality Certification for the Hartley Drive Widening and Extension
Dear Mr. Pugh:
On October 23, 2008, the North Carolina Division of Water Quality (DWQ) received new information
regarding your application for a 401 Individual Water Quality, to impact 0.349 acres of wetlands and 518 linear
feet of an unnamed tributaries to Rich Fork in Guilford and Davidson Counties in order to construct the Hartley
Drive Widening and Extension. Review of this information indicates that additional information is required in
order that we may determine your project's compliance with 15A NCAC 211.0500. The DWQ 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.
As stated in the DWQ Stormwater BMP Manual for dry extended detention basins (page 17-2)
"Seasonally high groundwater table must be at least 2 feet below the bottom of the basin". The
Dry Extended Basin Supplement Sheet also notes that the SHWT elevation must be known in
order to complete this checklist. Please provide this information for all three detention basins.
2. As stated in the DWQ Stormwater BMP Manual for dry extended detention basins (page 17-2)
"A forebay is required if the design volume to the facility is over 10 acre-inches". For Basin #1,
the Dry Extended Basin Supplement Sheet also notes that the total runoff volume captured by
the basin indicates that a forebay is required. Please modify the design of Basin 41 to include a
Forebay.
3. As stated in the DWQ Stormwater BMP Manual for dry extended detention basins (page 17-2)
"A sediment depth indicator must be provided". The Dry Extended Basin Supplement Sheet
also notes that a sediment depth indicated is required. Please include this feature in all three
basins.
Noj Carolina
?tura!!b
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.ncwaterquality.org
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
Mr. Keith Pugh
Hartley Dr. Extension
November 19, 2008
Page 2
4. The Required Items Checklist notes that a construction sequence that shows how the dry
detention basin will be protected from sediment until the entire drainage area is stabilized is
necessary. The details provided on the plan sheet are not sufficient to ensure protection of the
basin and they do not clearly indicate the appropriate steps to be taken to convert/restore the
basin following roadway construction. Please provide a more detailed construction sequence.
5. Please provide a plant and landscape plan for the dry extended detention basins.
6. The construction detail provided for the cross vane within the mitigation area is not sufficient.
The construction detail should clearly specify size of rock, depth of rock, anchoring of footer
rocks into the stream banks, angle of wings on the cross vane, fabric use behind the vane to
prevent piping, depth of pool excavated below the cross vane, etc. The Division must ensure
that the cross vane is designed and installed properly to promote success of the stream
relocation.
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 timeframe, 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 DWQ. If you have any questions, please contact me at 336-771-4964 or
[e-mail].
S' erely,
Sue Homewood
DWQ Winston-Salem Regional Office
cc: Andy Williams, U. S. Army Corps of Engineers, Raleigh Regulatory Field Office
Brandon Phillips, STV/Ralph Whitehead Associates, 100 West Morehead Street, Suite 200, Charlotte,
NC 28208
DWQ Winston-Salem Regional Office
DWQ Wetlands/401 Unit