20130517 All Versions_Design Plans_20160718 (2)

Wrenn, Brian L
From:Bailey, David E SAW <[e-mail]>
Sent:Monday, July 18, 2016 4:46 PM
To:Lovinggood, Ray D; Wrenn, Brian L; Eason, Patty P; Lorenz, Kris;
'[e-mail]'; Wilson, Travis W.; Riffey, Deanna
Cc:Morgan, Stephen R; Shumsky, Michael J
Subject:RE: R-2413A
Ray,

Sorry for not returning your phone call earlier. The Corps concurs with NCDWR and NCWRC that pipe burial at such a
steep slope isn't warranted. No issue with pipe material. If rip rap in the channel is necessary for velocity dissipation to
maintain stability of the channel downstream then the Corps is not opposed. Compensatory mitigation may be required
for the length of channel impacted by rip rap, depending on stream quality and how the rip rap proposed to be placed in
the stream. Please let me know if you have any questions.

-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
Phone: [phone], Ext. 30.
Fax: [phone]
Email: [e-mail]

The Wilmington District is committed to providing the highest level of support to the public. To help us ensure we
continue to do so, please complete the Customer Satisfaction Survey located at
http://corpsmapu.usace.army.mil/cm_apex/f?p=136:4:0.

-----Original Message-----
From: Lovinggood, Ray D \[mailto:[e-mail]\]
Sent: Monday, July 18, 2016 2:27 PM
To: Wrenn, Brian L <[e-mail]>; Bailey, David E SAW <[e-mail]>; Eason, Patty P
<[e-mail]>; Lorenz, Kris <[e-mail]>; '[e-mail]' <[e-mail]>; Wilson,
Travis W. <[e-mail]>; Riffey, Deanna <[e-mail]>
Cc: Morgan, Stephen R <[e-mail]>; Shumsky, Michael J <[e-mail]>
Subject: \[EXTERNAL\] R-2413A

All,

I am reviewing a construction change for the subject project and have three questions which are listed below the plan
view image.
1

The 48" CSP cross pipe near -YC1- Sta 25+50 is shown as a 48" CSP, 16 Gage.

This pipe should be RCP-IV, not corrugated steel.

My questions are:

1. Was there a commitment to use a metal pipe at this location? Why?

2. With a slope of 7.74% and a stream slope of 5% downstream of the pipe, do we bury the pipe 20% of its diameter
and try to keep material in it? The plans call for it be buried 0.8', but on a slope that steep, I doubt material would stay in
the pipe. To possibly keep material in the pipe, sills on both ends will be required. Also, the pipe would need to be
upsized to either a 54" or 60" to compensate for the area lost to burial of the pipe.

3. Plans show outlet protection as Cl I Riprap on the channel banks. I recommend Class I riprap also in the channel
bed, but without geotextile fabric.

Any comments?

Thanks,

Ray

Ray D. Lovinggood, P.E.

Engineer - Advanced

Hydraulics Unit

North Carolina Department of Transportation
2

919 707 6736 office

[e-mail]

NCDOT Hydraulics Unit

1020 Birch Ridge Drive

NCDOT Hydraulics Unit

1590 Mail Service Center

Raleigh, NC 27699-1590

Email correspondence to and from this address is subject to the

North Carolina Public Records Law and may be disclosed to third parties.

_____________________________________________________________

Facebook <Blockedhttps://www.facebook.com/NCDOT1/> Twitter <Blockedhttp://ncdot.gov/travel/twitter/>
YouTube <Blockedhttps://www.youtube.com/user/NCDOTcommunications>

________________________________

3

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

________________________________

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

4