SW3220803_Response To Comments_20230815

j!j THOMAS & HUTTON
1020 EUCLID AVENUE
CHARLOTTE, NC 28203 I 980.201.5505
WWW.T H O MASAN D H UTTO N.CO M
August 15th, 2023
Attn: Jim Farkas
NCDEQ- Division of Energy, Mineral, and Land Resources
Land Quality-Stormwater Program
512 N. Salisbury Street
1612 Mail Service Center
Raleigh, NC 27699-1612
Re: Cresswind Wesley Chapel- Phase 4
Storm Water Review
Monroe, NC
J-27842.0004
To whom it may concern:
This letter serves as acknowledgement that we have revised the previously submitted package to
address all comments below as follows:
- Application:
o Section IV, 10- Please revise as needed so that the information is consistent with
the Supplement-EZ Form:
Item Provided Value Value per Supplement-EZ
Form
Proposed Impervious 1,840,410 1,177,540
Area (sf)
% Impervious Area 64% 55%* _
On-site Parking (sf) 147,000 183,750
Total (sf) 1,140,790 1,177,540
*NOTE: 1,177,540 sf/ 1,840,410 sf= 64%so the %BUA as shown in the Application is
correct (The Supplement-EZ Form needs to be revised, see below).
Application and EZ Form has been revised per comment above with update
values to match.
- Supplement-EZ Form:
o Drainage Areas Page:
■ Prior Comment- Pond 5 Column, Line 16- Please revise this item (see
earlier comment). Per the previously provided email, the "correct"
drainage area size for this SCM is 1,840,410 sf and a total of 1,177,540 sf of
BUA is located within the drainage area to the SCM (1,177,540 sf /
1,840,410 sf = 64%). NOTE: The provided value for the entire site column,
55%, is OK and does not need to be changed.
Revised per comment.

o Wet Pond Page:
■ Prior Comment- Line 25-The temporary pool elevation is typically set by
the invert of the lowest bypass elevation of the SCM (the weir @ 576.40').
Please revise. The provided value, 576.22' does not correspond to the
bypass weir invert at elevation 576.40'. Please revise.
Revised per comment.
■ Prior Comment- Line 35-The design volume of the SCM is the volume
that can be stored above the permanent pool surface elevation and
below the temporary pool surface. The provided value, 95,975 cf, does
not correspond to the volume of water that can be stored between the
permanent pool surface elevation and the invert of the bypass weir (Per
the provided stage storage table, the storage volume provided above
the permanent pool and below 576.40' is approximately 98,000 cf). Please
revise.
Revised per comment.
We look forward to receiving the approved certification for the referenced project to
allow us to proceed. If you have any questions, comments, or desire additional
information, please contact our office at [phone].
Sincerely,
THOMAS & HUTTON
"ei‘05,;3://0/.
Matthew S. Kiker, PE
MSK