20110392 Ver 3_Emails_20150218

Wanucha, Dave
From: Nicole Thomson <[e-mail]>
Sent: Wednesday, February 18, 2015 4:21 PM
To: Wanucha, Dave; Bailey, David E SAW; Parker, Jerry A
Subject: RE: R2413C - US 220 Widening (UNCLASSIFIED)
In this case, the entire natural channel bed is bedrock I think it was more just a situation of how much do we
remove before it is too much. The outcropping of bedrock in this particular system is reminiscent of streams I
would see in new Hampshire.
Pll forward this to the resident engineer on the project and we'll remove the larger pieces.
Thanks to you both for your inputi
Be safe out there. Another storm front is moving in tonight. Oh. Joy.
Nikki
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-------- Original message --------
From: "Wanucha, Dave"
Date:02/18/2015 4:11 PM (GMT-05:00)
To: "Bailey, David E SAW" ,Nicole Thomson ,"Parker, Jerry A"
Subject: RE: R2413C - US 220 Widening (LTNCLASSIFIED)
Pm wondering why they decided to leave the rock within the culvert vs. removing it all together. Pm guessing the thinking was
similar to what we observed at mitigation site 4 for U-2525B where the culvert was backfilled with native channel material in an effort
to enhance/create channel habitat. I do not totally agree with the practice but intend to confer with our folks. Pm meeting with Amy E
next week for compliance reviews in Div 9 and will talk with her to get a better understanding as to why they decided to go the route
they did on this particular situation. They may have thought the rock would have been broken up into smaller sizes. Having said all
that, I agree with the Corps in that rock needs to be moved to allow flow through, prevent potential blockages and ameliorate present
conditions.
Dave W
Dave Wanucha
NC DENR Winston Salem Region Office
NC Division of Water Resources
Transportation Permitting Unit
450 W. Hanes Mill Rd, Suite 300
Winston-Salem, NC 27105
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Dave. [e-mail]
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-----Original Message-----
From: Bailey, David E SAW �mailto:David.E.Baile�(a�usace.arm .mil
Sent: Wednesday, February 18, 2015 3:20 PM
To: Nicole Thomson; Wanucha, Dave; Parker, Jerry A
Subject: RE: R2413C - US 220 Widening (iJNCLASSIFIED)
Classification: LTNCLASSIFIED
Caveats: NONE
Nikki,
Per our discussion this afternoon, the Corps is concerned about a blockage at the head of or within the bottomless culvert as described,
as all culvert structures must allow for the passage of normal and high flows as well as aquatic life movement. As such, removing
some of the rock in the center of the culvert to allow low flow away from the footers is acceptable and appropriate, assuming there is a
path for low flow within the culvert. Rock removed can be placed on the sides of the channel or relocated to uplands if flow blockage
is a concern. If, during the course of these actions you encounter any problems or discrepancies with Corps permit conditions, please
let me know. Dave W., do you have any concerns about this issue?
-Dave Bailey
David E. Bailey, PWS
Regulatory Project Manager
US Army Corps of Engineers
CE-SAW-RG-R
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
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-----Original Message-----
From: Nicole Thomson [mailto:nthomson(a�sepien ing eerin .com
Sent: Friday, February 13, 2015 9:44 AM
To: Wanucha, Dave; Bailey, David E SAW
Subject: [EXTERNAL] R2413C - US 220 Widening
Good morning gentlemen.
Please see the above pictures. This particular location (forgive me, I can't remember the impact site number but I am going to get it) is
where a bottomless culvert was proposed and partially installed (due to the nature of the traffic management along US220, NCDOT is
doing the culvert installations in a phased approach). This site was the one that had this HUGE bedrock impoundment at the front of
the OLD culvert that the contractors ultimately just placed the 3-sided culvert over. Andy and Amy probably remember this site the
best as this was one of the first ones we visited when we did compliance on this back in late 2013. Anyway, the decision was made by
Andy and Amy to have the contractors break up the bedrock so that the channel would eventually go down the center of the culvert
rather than be directed at the sides. The above pictures show what has been done to date. Barry Harrington and I both want your input
on this. Neither of us is necessarily turning cartwheels over how it looks. I suggested that the larger pieces that have been broken up
be moved to the side so that it doesn't form a"dam" in the culvert (and please note that there is still another section of bottomless to be
placed immediately adjacent to this one for the southbound lanes of 220).
The second image above is me standing in at the front of the culvert looking downstream; where I am standing will eventually be
within another section of 3-sided culvert, so this area will be roughly in the middle when the installation is completed. If you didn't
see it before, where I am standing was COMPLETELY obstructed with a bedrock outcropping that just about reached the top of the

culvert and there was only about 2-3 foot of clearance on either side that was up against the walls of the culvert.
Thanks in advance guys. I tried to be as descriptive as I could between the email and the pictures. If this is something you would like
to see in person, let me know and we'll figure out a time.
Nik
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Classification: LTNCLASSIFIED
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