20090457 Ver 1_Compliance Inspection Letter_20090814

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North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Division of Water Quality
Coleen H. Sullins
Director
Dee Freeman
Secretary
August 14, 2009
Mr. Isaac Hinson
City of Charlotte, Stormwater Svc.
600 East Fourth St.
Charlotte, NC 28202
Dear Mr. Hinson:
Subject: 401 Certification Compliance
Culvert Replacement, W. Rocky River Rd.
DWQ #: 09-0457
Mecklenburg County, NC
On August 4, 2009, this office conducted a 401 Certification compliance inspection at the subject site to
determine if the project was constructed as submitted to the Division of Water Quality (DWQ). Based on our
inspection, the construction appeared to be, in general, compliant. However there was concern with the rip rap
velocity dissipater that was in place at the downstream end of the culvert. The stream currently flowed
"through" the rip rap, instead of over the rip rap, thus the migration of aquatic biota is inhibited. It was
mentioned that it is expected that over time the stream substrate will fill the voids of the rip rap returning the
flow pattern to a more natural state.
A follow up inspection shall be conducted at a later date to determine if the above infill occurs. At that
time it will be decided if any modifications are required.
Sincerely,
f'
Alan Johnson .
Surface Water?81" ction
Environmental Specialist
cc: John Hennessy - Compliance/Enforcement
Ian McMillan - Wetlands Unit
Mooresville Regional Office
Location: 610 East Center Avenue, Suite 301, Mooresville, NC 28115
Phone: [phone]\Fax: [phone]\ Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.orq
NorthCarolina
Natmally
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