20081213 Ver 2_More Info Letter_20081120

QF W ATFR p Michael F. Easley, Governor
JS t!i William G. Ross Jr., Secretary
7- North Carolina Department of Environment and Natural Resources
p Coleen H. Sullins, Director
Division of Water Quality
November 20, 2008
DWQ EXP # 08-1213v2
Mecklenburg County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. David Niekamp
Crescent Resources, LLC
400 S. Tryon Street, Suite 1300
Charlotte, NC 28285
Subject Property: South Tract City Blvd Development
REQUEST FOR MORE INFORMATION (STORMWATER MANAGEMENT PLAN)
The Division of Water Quality (DWQ) has reviewed the additional information (Stormwater Management Plan
(SMP) dated November 17, 2008) received on November 18, 2008 from your engineers Mr. Matt Edwards, PE
and Ms. Beverly Rosenbloom, El, both of Kimley-Horn Associates, Inc. The DWQ has determined that your
application will require more information. Please provide the following information so that we may continue to
review your project and prevent return of your application as required by 15A NCAC 2H .0506:
Additional Information Requested
1. Please complete and submit Section VI of the Stormwater Management Application Form.
2. Wet Ponds:
a. Please revise the calculations, the supplement forms and the BMP grading plans such that the forebay
volume (below permanent pool elevation) is within 18 - 22% of the total permanent pool volume.
b. Please provide a forebay spillway reinforced with riprap at the permanent pool elevation in each
pond. The spillway length (weir) and the riprap shall be designed for the 10-year storm. Please
specify type of riprap on the plans.
c. Please specify the orifice sizes to be drilled in the cap on the 4-inch PVC pipe in the figure detailing
the submerged orifice outlet configuration.
d. Please call out the compacted clayey soil in the plan views of the ponds on sheet C-6, and use a thick
line to indicate the clay material in the cross sections on sheet C-7 up to the bottom of shelf elevation.
Please respond within five (5) days of the date of this letter by sending two (2) copies of the above information in
writing. Please submit only revised information (both calculations as well as plans). The Express Review
Program is a process that requires all parties to participate in a timely manner. 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.
401401 Oversight / Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] FAX [phone] Internet: http://h2o.enr.state.nc.us/ncwetlands
N e hCarolina
Aoatura!!y
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
08-1213v2 South Tract City Blvd SNIP
November 20, 2008
Page 2 of 2
Please contact Joseph Gyamfi or Lia M. Gilleski at 919-733-1786 if you have any questions regarding, or would
like to set up a meeting to discuss, this matter.
Sincerely,
Qv'??4" /'?
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBK/jg
cc: Steve Chapin, USACE Asheville Regulatory Field Office
Alan Johnson, DWQ Mooresville Regional Office
File copy
Mr. Matt Matthews, DWQ - Wetlands & Stormwater Branch
Matt Edwards/Bev Rosenbloom, 4651 Charlotte Park Dr., Suite 300, Charlotte, NC 28217