20231504 Ver 1_USACE More Info Requested_20231220

Homewood, Sue
From: Perez, Douglas J CIV USARMY CESAW (USA) < [e-mail] >
Sent: Wednesday, December 20, 2023 1:11 PM
To: Aliisa Harjuniemi; Homewood, Sue
Subject: RE: [Non-DoD Source] Re: [External] SAW-2023-01796 / Coble Road
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Aliisa,
Thank you for the prompt response. I appreciate the responses provided but they do not answer my questions.
We at the Corps understand that the pipe under the road (see email thread below). Is a stormwater pipe typical for a
developer to route stormwater flow under proposed house lots? This connection seems to provide a hydrologic
connection from upstream to downstream, so is it a French drain? There is a culvert emplaced in a location that does
not have an aquatic feature, and we are not sure why.
I understand the initial development was approved in 2007 by the city of Mint Hill. It is currently 2023 which is 16 years
from approval. I am not sure that the network/ roadway alignment was appropriate at that time, is applicable with
current codes. Do you have an updated development plan that has been approved? We also understand that it is the
purview of the applicant to obtain all local/regional permits before starting work. We just want to ensure that all
avoidance and minimization for the site layout has been completed. Lot sizes/ location and road designs can change, we
want to make sure that the permit approval is up to date.
In addition, the Delineation was not verified by the USACE. At this time, we would assume that the stream labeled
'intermittent" is actually a Perennial. And we would like to see a documented photograph from the top of the reach of
Stream B (looking up -channel) to determine if it is a head cut/seep/ephemeral flow providing hydrology to this perennial
stream. In addition to additional photographs, a datapoint with appropriate data forms within this reach are requested.
You have 30 days to respond to this email, before the USACE will administratively withdraw the application due to lack
of information.
Regards,
Doug J. Perez
Regulatory /
US Army Corps of Engineers
Wilmington District
Charlotte Field Office
Office : [phone]
Cell : [phone]
From: Aliisa Harjuniemi <[e-mail]>
Sent: Wednesday, December 13, 2023 11:56 AM

To: Homewood, Sue <[e-mail]>
Cc: Perez, Douglas J CIV USARMY CESAW (USA) <[e-mail]>
Subject: [Non-DoD Source] Re: [External] SAW-2023-01796 / Coble Road
Doug and Sue,
Thank you for your comments. Our responses are below in red.
- First, what is that structure below those proposed house lots and what is the purpose? It is a stormwater pipe. The
outlet is better shown in the screenshot below. (It does not drain directly to the stream).
Second, why can't the road be shifted to the west and completely avoid the impacts? There appear to be plenty of
SWCs already proposed for this project and plenty of room.
- The SWC in question was required as a part of their fire safety plan. The proposed development was designed based
on the zoning requirements of the City of Mint Hill. Site layout and roadway connectivity were initially established with
previously approved plans for the subdivision. Based on the number of proposed lots and the requirements of the NC
Fire Code and City of Mint Hill, the residential roadway network layout requires two points of access in the vicinity of the
stream crossing. The proximity of the stream to the western boundary line limits the placement of these required
internal roadway access points. The stream crossing was chosen to be at the upper end of the stream to reduce the
need for culvert capacity and stream disturbance. I have attached the previous permit approval from 2007 for this
project.
Thanks,
On Mon, Nov 20, 2023 at 7:45 AM Homewood, Sue <[e-mail]> wrote:
Aliisa,

Please copy me on your response to Doug.
Thanks,
Sue Homewood (she/her/hers)
401 & Buffer Permitting Branch
Division of Water Resources
[e-mail] please note my new email address
336 813 1863 mobile
919-707-3679 office
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Perez, Douglas J CIV USARMY CESAW (USA) <[e-mail]>
Sent: Friday, November 17, 2023 8:36 AM
To: Aliisa <[e-mail]>
Cc: Homewood, Sue <[e-mail]>; Pitner, Andrew <[e-mail]>
Subject: [External] SAW-2023-01796 / Coble Road
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Hey Aliisa,
I had some questions about this project. First, what is that structure below those proposed house lots and what is the
purpose? Second, why can't the road be shifted to the west and completely avoid the impacts? There appear to be
plenty of SWCs already proposed for this project and plenty of room.

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Let me know,
Doug J. Perez
Regulatory Specialist
US Army Corps of Engineers
Wilmington District
Charlotte Field Office
Office : [phone]
I
Cell : [phone]
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
Aliisa Harjuniemi, PWS
Project Manager
Carolina Wetland Services, Inc.
4

550 E. Westinghouse Boulevard
Charlotte, NC 28273
Direct: 980-259-1222
Office: 704-527-1177
www.cws-inc.net