20100684 Ver 1_More Info Letter_20110103

LPWA
JA , If I AF
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
Attn: Mr. Rick Howell
City of Shelby
300 S. Lafayette
Shelby, NC 28151
Subject Property: Foothills Commerce Center, Phase I
REQUEST FOR MORE INFORMATION (Stormwater Management Plan)
Dear Mr. Howell:
On December 3, 2010, the 401/Wetlands Permitting Unit of the Division of Water Quality (DWQ) received your
stormwater management plan (SMP) along with supporting information for the subject project in Cleveland County.
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 provide the complete information for Wet Ponds 2 and 3 including all the requested information on the
required items checklist.
2. Wet Detention Basin #1 (may be applicable to Ponds 2 & 3):
a. Please specify the orifice sizes on the plans.
b. Based on the design information, the orifice size for pond Ishall not exceed 2.5 inches. It is recommended
that the water quality design volume drains not less than 2 days, and the entire temporary pool volume
drains not more than 5 days.
c. As discussed with your engineer, the flow elongation baffles may be eliminated. The forebay weir for
pond #3 should be located in the middle of the berm. All three forebay weirs should be reinforced with
appropriate riprap.
d. Volume of forebay shall be 18 - 22% of entire pond volume.
e. A larger outlet pipe is recommended to pass larger storms. A 6-inch pipe is significantly inadequate.
f. Please submit anti-flotation calculations for the outlet structure.
January 3, 2011
Dee Freeman
Secretary
DWQ EXP No. 10-0684
Cleveland County
3. Planting plan (Not reviewed): You may receive additional information if found deficient.
Please respond within 30 days of the date of this letter by sending two (2) collated copies of the above information
and any revisions in writing. This lett
wetlands, waters or protected buffers.
on review and does not authorize any impacts to
Thank you for your attention to this matter. If you have any questions or wish to discuss these matters further please
do not hesitate to call me or Joseph Gyamfi at 919-807-6246.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
Location: 512 N. Salisbury St, 91h Floor, Raleigh, North Carolina 27604
Phone: [phone]\FAX: [phone]
Internet: http://portal.ncdenr.org/web/wq/swp/ws/401
NorthCarohna
naturally
An Equal Opportunity \ Affirmative Action Employer
Foothills Commerce Center (Cleveland)
Page 2 of 3
January 3, 2011 A 'A
Sincerely,
Ian McMillan, Acting Supervisor
401 Oversight/Express Review Program
CBK/jg
cc: File copy
Alan Johnson, DWQ Mooresville Regional Office
Steve Chapin, USACE Asheville
Rhonda H. Honeycutt, McGill Associates, PA., 55 Broad St., Asheville, NC 28801