SW3191105_AddInfoRequest_20191210

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
Weston Boles, PE
WK Dickson & Co., Inc.
1213 W. Morehead Street, Suite 300
Charlotte, NC 28208
NORTH CAROLINA
Environmental Quality
December 10, 2019
Subject: Request for Additional Information
Stormwater Permit No. SW3191105
Millbridge Phase 7E
Union County
Dear Mr. Boles:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on November 21, 2019. A review of that
information has determined that the application is not complete. The following information is
needed to continue the stormwater review:
1. The deed restriction forms allow for far more BUA than is listed on the application form
for "On -site Buildings/Lots." How is this BUA being accounted for in the design?
2. Please delineate all wetlands on site or add a note that none exist as well as the name of
the person/entity that made the determination [15A NCAC 02H .1042(2)(g)(iii)].
3. Please provide documentation from the NC Secretary of State or other official
documentation showing the titles and positions held by the person who signed the
application [15A NCAC 02H .1042(2)(b)(ii)].
4. Please provide a signed and sealed copy of the Supplement EZ form. Note that an
updated form of Supplement EZ is available on the Stormwater Design Manual website.
5. The drainage areas listed in the table on Page 3 of the SWU-101 application do not match
the drainage areas and BUA used in the calculations and Supplement EZ form.
6. The storage areas used in the calculations to find the temporary ponding depth do not
match the stage -storage data in the adjacent table or the areas shown on the plans. Please
correct this discrepancy to recalculate the temporary pond elevation and drain times.
D EQ �� North Carolina Department of Environmental Quality Division of Energy, Mineral and Land Resources
512 North Salisbury Street 1 1612 Mail Service Center Raleigh, North Carolina 27699-1612
NORTH CAROLINA
o.P.nm.morenmonm.maauaz /� 919.707.9200

7. Please show the average depth calculation using either Equation 2 or Equation 3 from the
Wet Pond Chapter in the Stormwater Design Manual.
8. Please specify the sediment storage elevations in the wet ponds on the detail sheets
(Sheets C9.7, C9.8, and C9.9).
9. Please provide rip rap calculations for the outlet from Wet Pond #3.
10. The bottom elevations of Wet Pond 1 and Wet Pond 2 on the detail sheets (Sheets C9.7
and C9.8) do not match the bottom elevations shown on the grading plan.
11. Please update the Supplement EZ form to reflect any changes made to the wet pond
designs.
12. Provide pdfs of all revisions, 2 hardcopies of revised plan sheets, and 1 hardcopy of other
documents. Pdfs must be uploaded using the form at:
hqps:Hedocs.deg.nc.gov/Forins/SW ProjectSubmittal
Please note that this request for additional information is in response to a preliminary review.
The requested information should be received by this Office prior to January 9, 2020, or
the application will be returned as incomplete. The return of a project will necessitate
resubmittal of all required items, including the application fee. Please reference the State
assigned project number SW3191105 on all correspondence.
If you need additional time to submit the information, please submit your request for a time
extension to the Division at the contact below. The request must indicate the date by which you
expect to submit the required information. The Division is allowed 90 days from the receipt of
a completed application to issue the permit.
The construction of any impervious surfaces, other than a construction entrance under an
approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject
to enforcement action pursuant to NCGS 143-215.6A.
If you have any questions concerning this matter please feel free to contact me at
Corey.Anen&ncdenr.gov or [phone].
Sincerely,
Corey Anen
Environmental Engineer
Stormwater Program
cc: Mooresville Regional Office