20170239 Ver 2_U-3109 Site 2_20200910 (3)

Wanucha, Dave
From:Parker, Jerry A
Sent:Friday, September 4, 2020 11:24 AM
To:Wanucha, Dave
Cc:[e-mail]; '[e-mail]'; Howell, John; Harper, Aaron A;
Hayes, John R; Eason, Patty P
Subject:U-3109 Site 2
Attachments:U-3109 Site 2 Permit Drawing.pdf; U-3109B Site 2 pics; Sample Pre-formed Scour
Hole.pdf

Dave,

This email is being sent to document the conclusions of the onsite meeting at
Permit Site 2 on project U-3109 on September 3, 2020. The meeting was
scheduled due to NCDOT’s concern about removing vegetation along the fairly
vertical banks of Mill Creek (see pictures) in order to install riprap on both sides of
the banks at the outlet end of pipes per the permit drawing (see attached). Due to
the apparent stability of the banks which was aided immensely by the existing
dense vegetation, NCDOT was reluctant to remove the vegetation in order to
replace with riprap. At the meeting, it was decided that instead of replacing the
vegetation with riprap, that NCDOT would retain the existing dissipator pad on the
north side of the creek and install a pre-formed scour hole at the outlet end of the
pipe on the southern side of the creek. A sample drawing of a pre-formed scour
hole has been attached. The southside pre-formed scour hole would be installed
more than 50 feet from the top of bank which would allow for sheet flow through
a vegetated buffer down to the creek. Impacts to the adjacent jurisdictional
stream would actually be lessened due to this proposed change. Please let me
know if you have any questions or if there is anything you would like to add prior
to NCDOT commencing the work. Thanks.

Jerry

Jerry Parker
Environmental Supervisor
Division 7
North Carolina Department of Transportation

336 256 2063 office
[e-mail]

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1584 Yanceyville St.
P.O. Box 14996
Greensboro, NC. 27415-4996

Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties.
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