20190850 Ver 1_More Info Received_20190717

Strickland, Bev
From:
Jason Foster <[e-mail]>
Sent:
Wednesday, July 17, 2019 2:32 PM
To:
Fuemmeler, Amanda J CIV (US)
Cc:
Price, Zan (George)
Subject:
[External] RE: Marsh Creek S/D NWP 29 - Need add'I Info
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Amanda,
Yes, we tried to connect from Ascension but it is private drive and the owners of the Meadows would not allow us to
connect. They would only allow us an emergency vehicle connection with gate. The City requires us to connect to a
public or private right-of-way that meets the City of Asheville Standards which left us the Heritage Drive option. We
couldn't use the hammerhead due to slopes so we had to use a connection to Heritage Drive for access. This led us to
adding a few lots to offset the cost, but we were crossing the stream to use Heritage in that case anyway. We did look at
alternative stormwater ponds at each end but given we had to rework the slope we put the stormtech in the area we
had to grade since it was going to be disturbed either way.
Let me know if I can provide any additional information to help with the review. It has been a very "interesting" site for
better or worse but we did try to limit and offset some of the impacts in design. It would have been better for sure if the
Meadows would allow us access. They have some pretty bad traffic issues with people leaving the site evidently and
were completely unwilling to let us connect.
Thanks,
Jason Foster
Jason Foster, PE
Civil Design Concepts, P.A.
Office:[phone]
Cel 1:(423)-747-7757
Office locations: 168 Patton Avenue Asheville, NC 28801 52 Walnut Street — Suite 9 Waynesville, NC 28786
Mailing address: P.O. Box 5432 Asheville, NC 28813 www.cdcgo.com
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-----Original Message -----
From: Fuemmeler, Amanda J CIV (US) <[e-mail]>
Sent: Wednesday, July 17, 2019 2:11 PM

To: Jason Foster <[e-mail]>
Cc: Price, Zan (George) <[e-mail]>
Subject: RE: Marsh Creek S/D NWP 29 - Need add'I Info
Thanks for the information. Sounds like has been an interesting site to try and make work. Is the road connection being
required by city/county? Again, just wondering why the crossing is needed in the first place which I didn't see in your
email but may have missed it. Feel free to give me a call to discuss.
Amanda
828-271-7980 ext. 4225
-----Original Message -----
From: Jason Foster [mailto:[e-mail]]
Sent: Wednesday, July 17, 2019 12:57 PM
To: Fuemmeler, Amanda J CIV (US) <[e-mail]>
Cc: Price, Zan (George) <[e-mail]>
Subject: [Non-DoD Source] RE: Marsh Creek S/D NWP 29 - Need add'I Info
Amanda,
I can update the application as needed. The grading and encapsulation of the pipe is to construct the road across the
existing stream channel. The site is just really steep and our grading carries out either side really far, even further than
shown since we are using a modular block wall for our upstream headwall. It is the same scenario on the downstream
side. We propose grading will carry out to tie into existing so instead of leaving a small open section between the
existing upstream pipe and our headwall we tied it in. We were concerned the open portion could be a point of failure
and lead to flooding on the roadway. Although the likelihood of failure is acceptable, the consequence was not for us
during planning and design. Failure of the existing open end due to clogging, etc. will result in dangerous road conditions
on a busy road due to water crossing the roadway. Our upstream HW and embankment will allow for adequate ponding
and storage in the event of any issues with the culvert. In order to offset this we took our required open space by City of
Asheville and distributed it adjacent to the upstream stream buffer, effectively doubling the size of the upstream buffer
area in a permanent fee simple lot that cannot be used for development in perpetuity.
1. The low point of the road to lessen grading and overall impact falls directly over the stream so we would have storm
in that sag over the crossing in either scenario. Crossing over it made sense because we were already going to be
disturbing this area to continue the road embankment going out towards Heritage Dr.
2. We have considered the Stormtech on both sides, but per 1. above putting it on the other side pushed it down further
invert wise so getting it in the ground will disturb that entire area, on either side, again, since it was already being
disturbed we put in in the flatter location where hopefully it would be easier to construct from the existing hammerhead
entrance.
3. We couldn't use standard headwalls due the steep slopes unless we extended the pipe all the way down. Given the
required sidewalk grading for City of Asheville and the distance the downstream modular block will extend to tie back
into grade our impact basically will go almost all the way to the point of connection. +/- 20 to 30. 1 can pull earlier
designs to see how close it got, but it was close.
4. In order to offset this we took our required open space by City of Asheville and distributed it adjacent to the upstream
stream buffer, effectively doubling the size of the upstream buffer area in a permanent fee simple lot that cannot be
used for development in perpetuity.
Let me know if we can do a short call, this is honestly iteration 20 of this site and we have had ponds at both ends and
tried to minimize disturbance to the best we can and arrived at this design with the least disturbed area. The existing
grades are really what is forcing my hand. It is just a really steep site.

Would a call to discuss and look it over help?
Thanks,
Jason Foster
Jason Foster, PE
Civil Design Concepts, P.A.
Office:[phone]
Cel 1:(423)-747-7757
Office locations: 168 Patton Avenue Asheville, NC 28801 52 Walnut Street — Suite 9 Waynesville, NC 28786
Mailing address: P.O. Box 5432 Asheville, NC 28813 Blockedwww.cdcgo.com
Privileged and Confidential: The information contained in this email message and any attachments is confidential
information intended only for the use of individuals or entities named above. If the reader of this message is not the
intended recipient you are hereby notified that any dissemination, distribution or copying of this communication is
strictly prohibited. If you have received this email in error, please notify us immediately by email at the originating
address.
-----Original Message -----
From: Fuemmeler, Amanda J CIV (US) <[e-mail]>
Sent: Wednesday, July 17, 2019 12:31 PM
To: Jason Foster <[e-mail]>
Cc: Price, Zan (George) <[e-mail]>
Subject: Marsh Creek S/D NWP 29 - Need add'I Info
Jason,
I am reviewing the application and have a few comments/questions:
1. Please provide information as to why this crossing is needed in the first place.
2. Based on the plans, it appears that a portion of the stream piping is needed for grading associated with the
construction of the stormtech system versus just the road crossing and that stormwater is being piped over the road
crossing to this system. Please provide information on if this system could be placed at another location (i.e. on the
opposite side of the stream where the stormwater is being generated from) which would minimize impacts to the
stream channel by reducing the length of pipe needed in the stream.
Amanda Jones
Regulatory Specialist
U.S. Army Corps of Engineers
Asheville Regulatory Field Office
151 Patton Avenue, Room 208
Asheville, NC 28801-5006
828-271-7980 ext. 4225