SW6240106_Response To Comments_20240516

D&L Engineering, PLLC
Tra nsmittal
May 14, 2024
Stormwater Program
NCDEQ Energy, Minerals and Land Resources
1612 Mail Service Center
Raleigh,NC 27699-1612
To: Jim Farkas, Brianna Holland
From: Lee Humphrey
RE: Northgate Subdivision Phases 1, 2 & 3 (formerly Windfall Lake Phase 1)
Moore County,North Carolina
Stormwater Permit SW6240106
Jim,
We received your letter dated April 25, 2024 with comments concerning the proposed Northgate
Subdivision. In response, we offer the following,
1. Understood, however since the water and sewer permits were submitted for Phase 1 as
Windfall Lake, we need to leave the name the same for those sections since the permits
were acquired under that name.
2.
a. The revised permit application with DR Horton included is attached.
b. The requested calculations are attached with the updated calculations requested further
below.
c. The swale numbers have been changed to make things clearer when we were going back
through everything, hopefully, we didn't miss anything in re-numbering the swales.
d. Sheet C-21 has been updated in the plan set with the new swale numbers.
3.
a. The Supplement EZ form has been updated with the new swale numbers and the updated
calculations.
150 S. Page Street Southern Pines, NC 28387 PH: [phone]
Firm No. P-2587

D&L Engineering, PLLC
Tra nsmittal
b. The swale numbers have been changed to make things clearer when we were going back
through everything, hopefully, we didn't miss anything in re-numbering the swales.
c. The proposed piping between lots 80 & 81 has been removed. The lot numbers from the
overall layout and Phase 2 & 3 have changed. The overall layout was given to show the
whole development and was an older sheet that was included. See Sheet C-2 of the Phase
2 & 3 plans. The new lot numbers are 132 & 133. We cannot remove these pipes as they
are in the bottom of a natural low spot(see sheet C-7 profile) and we need to get this
water out somewhere.
4.
a. The application has been updated and is attached.
b. The requested detail has been added to the miscellaneous details on both projects.
c. None of the proposed ditches exceeds 8'.
d The roof BUA has been removed.
d There are existing chicken houses, barns, trailers, and double wide trailers on the property
to be removed. These are now shown on the Windfall Lake Phase 1 Existing Conditions
Sheet with a note they are to be removed.
d We could not correct the cell so we have included a note on line 15.
d The maximum velocity for any of the proposed ditches is 4.5 fps and the sheet has been
updated.
d The slopes have been updated to percent.
Please find attached two copies of the revised plan sheets and one copy of the revised
documentation for your review.
If you have any questions or need any additional information regarding this project,please
contact this office.
Thank you.
150 S. Page Street Southern Pines, NC 28387 PH: [phone]
Firm No. P-2587