SW6230702_Response To Comments_20231017

J THOMAS ENGINEERING, INC.
CIVIL ENGINEERING a PLANNING
143 Charlotte Avenue, Suite 104
Sanford,North Carolina 27330
919-777-6010 phone
www.jthomasengineering.com
License No. C-3389
October 17, 2023
Ms. Brianna Holland
NCDEQ DEMLR Stormwater Program
1612 Mail Service Center
Raleigh, NC 27699-1612
Reference: 2nd RE-Submittal of Application Package
The Homes at Reedy Branch Residential Development SW6230702
Harnett County, North Carolina
Dear Ms. Holland:
In response to your 'Request for Additional Information' letter dated September 30, 2023, J
Thomas Engineering, Inc. (JTE) offers the following responses.
Comment 1: Please show the required vegetated setback from surface waters (required per
15A NCAC 02H .1003(4) & .1017(10)) in the main set of plans and ensure that
vegetated setback requirements are met. Note that per .1003(4)(e), stormwater
that has not been treated in an SCM shall not be discharged through a vegetated
setback; instead it shall be released at the edge of the vegetated setback and
allowed to flow through the setback as dispersed flow.
JTE response: The enclosed revised plans show the vegetated setback as required on the
streams located on the property. No impervious areas are proposed within the
setback. All stormwater discharged from the proposed development areas are
released well before the edge of the setback and allowed to disperse.
Comment 2: Outlets must be stable per 15A NCAC 02H .1003(5). Riprap calculations were
provided at discharge points with culverts, but stability must be demonstrated at
all stormwater outlets. Provide engineering calculations exhibiting that where
vegetated conveyance ends,the exit velocity for the design flow is nonerosive for
the existing field conditions.
JTE response: Rock outlet protection is provided at all outlets from the proposed
development areas to help reduce velocities. Enclosed are additional

Ms.Brianna Holland
October 17,2023
2nd Re-Submittal of Application Package for Homes at Reedy Branch Residential
Page 2 of 2
computations to show that all nine (9) proposed outlet locations the velocities
are non-erosive.
Comment 3: Provide PDFs of all revisions, 2 hardcopies of revised plan sheets, 1 hardcopy of
other documents, and a response to comments letter briefly describing how the
comments have been addressed.
JTE response: Submittal made as requested.
I trust that the responses that are provided above will adequately address the NCDEQ's comments
from the previous submittal. If you find that any of our responses are not sufficient or if you have
any additional questions or comments, please do not hesitate to call.
Sincerely,
J Thomas Engineering, Inc.
/41 el
Jeremy R.Thomas, P.E.
President
Enclosure: Revised Plan Sheets 2,3,8 and 11A(2 copies)
Revised SW computations
J THOMAS ENGINEERING, INC.