ST1501A-CS180806
Priscilla Martinez
From:Marcus Marion
Sent:Tuesday, August 07, 2018 12:51 PM
To:Priscilla Martinez
Subject:Freeport - Drill Shaft Relocations
This is a correspondence about the drilled shaft being relocated and what needs to be done.
From: Geoff Scheid, P.E. <geoff.scheid@aguirre-fields.com>
Sent: Monday, August 6, 2018 2:17 PM
To: Darryl Zbranek <dzbranek@coppelltx.gov>; Claudio Segovia <claudio@jvolkconsulting.com>
Cc: Jay Volk <jay@jvolkconsulting.com>; FreeportProjectST1501 <freeportprojectst1501@coppelltx.gov>
Subject: RE: Freeport - Drill Shaft Relocations
Darryl,
Moving the drilled shafts is possible, but will require modifications to the abutment and bent designs. Please do let us
know how the meeting goes with Zayo and if they confirm the 3’ minimum clearance.
Thanks,
Geoff Scheid, P.E.
A GUIRRE & F IELDS LP
5320 North Tarrant Parkway, Suite 260
Fort Worth, TX 76244
(682) 325-5446 (Direct)
(817) 509-8300 (Main)
From: Darryl Zbranek <dzbranek@coppelltx.gov>
Sent: Monday, August 6, 2018 1:00 PM
To: Claudio Segovia <claudio@jvolkconsulting.com>
Cc: Jay Volk <jay@jvolkconsulting.com>; FreeportProjectST1501 <freeportprojectst1501@coppelltx.gov>; Geoff Scheid,
P.E. <geoff.scheid@aguirre-fields.com>
Subject: RE: Freeport - Drill Shaft Relocations
Claudio, have you heard anything back from A&F? If A&F is ok with moving the drilled shafts I will meet with Zayo to see
how comfortable they are with their marks.
Thanks,
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DZ
From: Darryl Zbranek
Sent: Thursday, August 2, 2018 10:31 AM
To: 'Claudio Segovia' <claudio@jvolkconsulting.com>
Cc: Jay Volk <jay@jvolkconsulting.com>; FreeportProjectST1501 <freeportprojectst1501@coppelltx.gov>; Geoff Scheid,
P.E. <geoff.scheid@aguirre-fields.com>
Subject: RE: Freeport - Drill Shaft Relocations
Claudio, please see below comments in red and let me know if there are any other questions or clarifications.
Thanks,
Darryl Zbranek
Chief Construction Inspector
City of Coppell, TX
(469)507-9095 (cell)
www.coppelltx.gov
From: Claudio Segovia <claudio@jvolkconsulting.com>
Sent: Wednesday, August 1, 2018 5:11 PM
To: Darryl Zbranek <dzbranek@coppelltx.gov>
Cc: Jay Volk <jay@jvolkconsulting.com>; FreeportProjectST1501 <freeportprojectst1501@coppelltx.gov>; Geoff Scheid,
P.E. <geoff.scheid@aguirre-fields.com>
Subject: RE: Freeport - Drill Shaft Relocations
Thanks Darryl, see A&F’s response below:
Moving drilled shafts is possible, but we would need to run a new analysis with the revised locations and make the
appropriate changes to the sheets.
In the PDF you sent, three proposed shafts are shown to be moved. The most challenging shaft would be that one located
under the wingwall. To move that shaft away from the identified utility, we would need to extend the abutment and
move the entire wingwall which would impact the pavement and rail above and the riprap below. The other two shafts
identified may be moved along their respective caps, but we may need to provide additional reinforcing in the caps to
accommodate changes in the stresses.
Typically we would provide a minimum of 1-ft to 2-ft clearance between drilled shafts and utilities, and as close as 6-in in
cases when we have high confidence in the utility locations. The Contractor is wanting to maintain a 3-ft clearance due to
the fact that we cannot verify actual location of the lines due to the depth. Based on the PDF provided, it appears there’s
already adequate clearance between the shafts on the abutment and bent and the identified utility, though perhaps not
at the wingwall shaft. The identified utility is 4 - 2” conduits, 3 are being utilized and one is empty. The locate marks are
based on the empty conduit and we are unsure of the arrangement of the 4 conduits, or how much separation there is
between the conduits, The PDF does not identify a conflict at Abutment 4, but it’s quite clear that the utility runs directly
through a proposed shaft at this end. The utility at Abutment 4 is only 4-ft deep. The utility company is proposing to
expose the utility and move out of the way of the drill shaft.
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To provide a good estimate of time and cost, we would need to clarify the required minimum clearance between shaft
and utility as well as the diameter of the utility. We would also need a copy of the CADD file showing this utility to then
determine exactly where we have a conflict and which shafts need to move. The drawing we sent shows what the
contractor feels are the conflicts. If moving the drill shafts is a possibility, our next step is to meet with the utility to see
what their response is to the having a 3’ clearance from the edge of the drill shaft to the locate marks.
Can you clarify/confirm the items above? I’ve cc’d Geoff w/ A&F to keep him in the loop.
Thanks!
Claudio Segovia | Engineer
J. VOLK consulting
830 Central Parkway East | Suite 300 | Plano | TX 75074
972-201-3100 (office)
972-201-3102 (direct)
972-322-7026 (mobile)
972-201-3099 (fax)
www.jvolkconsulting.com
Service with Integrity, Initiative and Innovation
From: Darryl Zbranek <dzbranek@coppelltx.gov>
Sent: Wednesday, August 01, 2018 1:22 PM
To: Claudio Segovia <claudio@jvolkconsulting.com>
Cc: Jay Volk <jay@jvolkconsulting.com>; FreeportProjectST1501 <freeportprojectst1501@coppelltx.gov>
Subject: RE: Freeport - Drill Shaft Relocations
Claudio, see the attached.
From: Claudio Segovia <claudio@jvolkconsulting.com>
Sent: Wednesday, August 1, 2018 12:59 PM
To: Darryl Zbranek <dzbranek@coppelltx.gov>
Cc: Jay Volk <jay@jvolkconsulting.com>
Subject: Freeport - Drill Shaft Relocations
Darryl,
I left you a voicemail about this but I just wanted to see if you’d be able to mark up on the attachment which drill shafts
you were thinking of moving and where so we can forward to A&F and see what would be needed to make the revisions.
Thanks!
Claudio Segovia | Engineer
J. VOLK consulting
830 Central Parkway East | Suite 300 | Plano | TX 75074
972-201-3100 (office)
972-201-3102 (direct)
972-322-7026 (mobile)
972-201-3099 (fax)
www.jvolkconsulting.com
Service with Integrity, Initiative and Innovation
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