SW3170303_Stormwater Narrative_20240701

ONE S CiviiEngineering I Land Solutions 1019 Thornsby Lane
"From Conception to Completion" Matthews,NC 28105
CIVIL DESIGN [phone]
**VETERAN-OWNED**
April 29, 2024
Project Reviewer
NC DEMLR
Stormwater
512 N. Salisbury Street
Office 640-E
Raleigh, NC 27604
Re: Stormwater Management I "Allen Storage"
To Whom:
This project is for the expansion of an industrial, boat/trailer storage facility located along Hyw 24/27
in Midland (Cabarrus County), NC. The previous phase of the project was already reviewed and
approved by DEMLR (As Permit: SW3170303). Now, the Owner would like to expand the facility
and modify the Permit to include additional impervious area and one additional stormwater basin.
As part of this submittal, none of the previously permitted items are being adjusted. Therefore, the
original plans, calculations, and information from "Chambers Engineering" shall be used—as already
permitted — for the areas that have been constructed, already. See Sheet CO.1 for the existing site
conditions. This shows the extent of the impervious areas that have been constructed per the previous
Permit.
The second phase of this project proposes just under 9 acres of new impervious area. Although, the
entire development will only have 17 acres of impervious area when completed, and this project sits
on a parcel that is 107 acres in size. Therefore, the Engineer-of-Record still contends that this project
could be permitted as a low-density development, but the State has asserted the project to include a
"high-density pocket" and has requested an S.C.M. be employed to treat stormwater runoff. Again,
the Engineer-of-Record disagrees and would argue that all projects would include a "high-density
pocket" (and would, thus, not qualify for low-density development) if only a small portion of the
project is considered in the overall drainage area. Nonetheless, a costly S.C.M. is proposed and
occupies nearly 20%of the developed area, now.Also, the original drainage plan (utilizing a vegetated
conveyance system) has been replaced by the attached plan, using piped conveyances.
Please advise if there are any questions or if additional information is required.
Cordially,
C. Matthew J es, M.A.,P.E.
Principal Engineer
JONES CIVIL DESIGN, P.C.
[phone]
[e-mail]