HomeMy WebLinkAbout20190300_RE_U-5741 Northeast Creek geotech borings_20190221Carpenter,Kristi
From: James, Amy
Sent: Wednesday, February 20, 2019 1:12 PM
To: Weychert, Curtis R
Cr. Shaver, Brad E CIV USARMY CESAW (US); Steenhuis,
Joanne; Rivenbark, Chris; Wilson, Travis W.
Subject: RE: U-5741 Northeast Creek geotech borings
Hi Curtis,
It will take approximately 4 weeks to collect all the borings. The borings will be
advanced using the mud rotary method. This involves setting a piece of 4" or 6"
diameter casing between the drill rig on the barge and the river bed to contain the
drilling fluid and cutting returns. The drilling itself is rotational, but it is encased. The
soil samples are collected by hammering a sampler at specified intervals. All soil
samples, drilling fluid and cutting returns are disposed off-site.
Let me know if you need more info.
Amy
From: Weychert, Curtis R <curt.weychert@ncdenr.gov>
Sent: Wednesday, February 20, 2019 10:49 AM
To: James, Amy <ajamesl0@ncdot.gov>; Wilson, Travis W.
<travis.wilson@ncwildlife.org>
Cc: Shaver, Brad E CIV USARMY CESAW (US) <Brad.E.Shaver@usace.army.mil>;
Steenhuis, Joanne <joanne.steenhuis@ncdenr.gov>; Rivenbark, Chris
<crivenbark@ncdot.gov>
Subject: RE: U-5741 Northeast Creek geotech borings
Hey Amy,
How long do you anticipate the borings will take to collect and how will they be
collected? i.e. vibration, rotational, impact hammer etc?
From: James, Amy
Sent: Wednesday, February 20, 2019 9:48 AM
To: Weychert, Curtis R«u_rt:we.ych_e_rt(�_n�den_r.:.�ca.v>; Wilson, Travis W.
<travis.wi IscrnC�_n�wi.ld.l_i�Fe.crr�>
............................................................._. _ ....................
Cc: Shaver, Brad E CIV USARMY CESAW (US) <I�_ra_d_,_�.._S.have_r..C,�_u_sa_ce.:a_rm�y.._m�i_I>;
Steenhuis, Joanne <jcranne.steenhuis('�ncdenr.�crv>; Rivenbark, Chris
<crivenk�ark('�.._n�dca.t.:..�.ca.v>
....................................................� _ .
Subject: U-5741 Northeast Creek geotech borings
Curtis and Travis,
NCDOT is proposing to replace bridge no. 7 on NC 24 over Northeast Creek in Onslow
County as part of TIP U-5741. In order to determine what sort of bents will be used in
the design, approximately seven geotechnical borings (3.5 inches in diameter) need to
be taken from the streambed (see attached). This crossing forms the boundary between
coastal and inland waters and is subject to a Primary Nursery Area moratorium between
Feb. 1 and Sept. 30. Due to the minimal in-water impact from this activity, NCDOT is
requesting to complete this work during the moratorium period. All work will be done
from a barge.
If you have questions or concerns before providing a decision, please let us know.
Thanks,
Amy
Amy James
Environmental Analysis Unit
Natural Environment Section
919-707-6129
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