20161268 Ver 2_U4751 Site 33_20191120

Carpenter,Kristi
From:Steenhuis, Joanne
Sent:Wednesday, November 20, 2019 7:50 AM
To:Herndon, T. Mason; Shaver, Brad
Subject:RE: U4751 Site 33
Mason,
If you think it will stabilize the slope then I am fine with it. I will add it to the file.

From: Herndon, T. Mason <[e-mail]>
Sent: Tuesday, November 19, 2019 3:46 PM
To: Shaver, Brad <[e-mail]>; Steenhuis, Joanne <[e-mail]>
Subject: U4751 Site 33

I meet with Jimmy out on U-4751 today to look at a pipe inlet at Site 33 at the interchange of I-140 (Quadrant C -L- line
left, Permit Drawing 51 od 83). See circled area below.

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This a 36 pipe at a tributary with a headwall without wingwalls. They are have a issues with getting this area to stabilize
and keep having to revisit the site after every rain event. They are requesting to wrap the headwall with rip rap and
extend the rip rap about 5 ft beyond the headwall to help stabilize the corners of the headwall. It appears that this is a
low spot and a lot of water from the slope and sheet flow from the surrounding area is coming to this area. They have
attempted to stabilize this area with vegetation and matting with no success. I believe a part of the issue is from
shading. See my sketch below showing the proposed place of rip rap (yellow blocks). I’m not sure why the headwall
(red block) extends so far beyond the fill slope on the permit drawings but that will be the approximate limits of the rip
rap.

I feel like it is a legitimate issue and the rip rap is warranted. I told Jimmy that I did not see any reason why they could
not do this, but I wanted to run it by the two of you before I gave them the official green. Please let me know if you
have any concerns.

Thanks!

Mason Herndon
Environmental Program Supervisor
Division 3
NCDOT- Division of Highways

910-341-2036 office
910-604-0050 mobile
[e-mail]

5501 Barbados Blvd
Castle Hayne, NC 28429

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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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