20140090 Ver 4_U-2579B permit site 23B and 28_20180227

Wanucha, Dave
From: Euliss, Amy
Sent: Monday, February 26, 2018 3:30 PM
To: Lastinger, James C CIV USARMY CESAW (US) ([e-mail]); Wanucha, Dave
Cc: Roden Reynolds, Bryan K CIV (US); Archer Sr, Wright
Subject: U-2579B permit site 23B and 28
Attachments: U-2579B permit site 28.pdf
On the U-2579B project, Smith Creek parallels existing I-40 Business in a steep ravine with unstable banks. On the opposite side
of Smith Creek there are a series of fish hatchery ponds. The permitted plan in the area is install rock plating involving a
retaining wall with soil nails. Since the project was permitted, Smith Creek has migrated closer to the proposed fill slope. The
Division is concerned about the constructability and long term stability of the wall, and the long term impacts to sedimentation
into Smith Creek. We permitted for 388' of permanent impacts and 188' of temporary impacts to Smith Creek at site 28 and
135' of permanent at site 23B. In discussing internally with our Hydraulics Unit and Division Construction, we believe our best
option long term for stability and maintenance of the transportation system would be to culvert the entire reach from the
existing culvert at site 23B until the end of existing site 28. I went back and reviewed the 4B and 4C minutes on the project to
see how, and the team was also concerned about the long term stability at the site.
Before we put a design on paper, we wanted to let you know what we were looking at and get your input. I'm thinking
permanent impacts from the outlet of the existing culvert to the end of site 28 would be approximately 770'. We would propose
mitigation for all new permanent (previously unmitigated) impacts. Please let me know your thoughts and/or concerns as soon
as possible so we can proceed with planning. Thanks.
I've attached a copy of the permitted drawings for this site for your reference.
Amy Euliss
Division 9 Environmental Officer
North Carolina Department of Transportation
336 747 7802 office
aeuliss .ncdot.qov
375 Silas Creek Parkway
Winston Salem, NC 27127-7167
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