ST9902-CS121113
Halie Hernandez
From:Woolsey, Gary <Gary.Woolsey@atmosenergy.com>
Sent:Tuesday, November 13, 2012 11:05 AM
To:Andrew Luce; Wisnevski, Michael
Cc:Keith Marvin; gary.dickinson@tritextech.com; Jones, Bobby L; Kirby, Martin Coleman;
Roper, Steven Dan
Subject:RE: Sandy Lake Rd. Reconstruction - Coppell, TX
If the depth of the pipeline falls to 48" then the plating will be required.
IF THE DEPTH OF THE PIPELINE FALLS BELOW 40", THEN THE CROSSING WILL
NEED TO BE RE-EVALUATED AND MORE STRENGENT PROTECTION MAY BE
REQUIRED.
Gary Woolsey
Sr. Project Manager
Ofc: 214-206-2717
Mob: 469-261-2317
5420 LBJ Freeway, Suite 1714A
Dallas, TX 75240
From: Andrew Luce [mailto:ALuce@TNPINC.com]
Sent: Thursday, November 08, 2012 3:38 PM
To: Wisnevski, Michael
Cc: Woolsey, Gary; kmarvin@ci.coppell.tx.us; gary.dickinson@tritextech.com
Subject: RE: Sandy Lake Rd. Reconstruction - Coppell, TX
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Michael,
Thank you for your response. Our typical pavement section will consist of 8” concrete on 8” treated subgrade. Ultimately
there will be 4.76’ of cover between top of pavement and top of pipe at the south curb line, however, temporarily
during construction, for a portion of the pipeline under pavement near the south curb line the cover will fall below 4’.
Gary had mentioned the use of steel plates over the line to distribute the loads of the vehicles during this time. Do you
have guidelines/requirements for this? Are there other steps and accompanying guidelines?
We will add notes in the plans regarding the axle load restrictions so that the Contractor that is selected is aware of the
requirements.
Please feel free to call me if you have any questions.
Thanks,
Andrew
From: Wisnevski, Michael [mailto:Michael.Wisnevski@atmosenergy.com]
Sent: Thursday, November 08, 2012 2:11 PM
To: Andrew Luce
Cc: Woolsey, Gary; kmarvin@ci.coppell.tx.us; gary.dickinson@tritextech.com
Subject: RE: Sandy Lake Rd. Reconstruction - Coppell, TX
Andrew,
I had previously reviewed this project for Atmos. After re-reviewing the design with Gary Woolsey, we do not see any
issue with separation mentioned below. Please be advised, that our calculations are based off a maximum 16,000 lb load
per axle and if there is any equipment that is heavier Atmos will have to be contacted to re-evaluate this crossing.
Also, the 4.76 ft separation is for the finally grade with the pavement. Please notify Atmos, if the construction grade falls
below 4 ft and/or a wheel load greater than 16,000 lb. Additional steps will have to be taken to insure the safety of the
gas line.
Please let me know if you have any questions.
Thanks,
Michael Wisniewski
TriTexTechnologies, Inc.
100 W. Morningside Dr.
Fort Worth, TX 76110
(817) 207-2843
From: Andrew Luce [mailto:ALuce@TNPINC.com]
Sent: Wednesday, November 07, 2012 1:12 PM
To: Woolsey, Gary
Subject: Sandy Lake Rd. Reconstruction - Coppell, TX
Gary,
Scott Gibson who you spoke with the other day forwarded me your contact information.
I am writing to you in regards to a different project – Sandy Lake Rd. in Coppell. Specifically I want to talk to you about
the separation from our top of pavement to the top of the 24” Atmos gas line crossing Sandy Lake from northwest to
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southeast. I have attached our paving plan and profile sheet, cross sections showing our clearance from your line, and
our Level ‘A’ test holes that gave us the elevations of the 24” gas line.
We have kept our profile as high as we possibly can to achieve a 5’ separation from top of pavement to top of pipe.
Where your line intersects with our south curb line, there is a separation of 4.76’. This is the smallest separation. As your
line heads north, it drops in elevation so that the majority of your line under our pavement will be at least 5.00’ below
the top of pavement. By the time the gas line intersects with our north curb line, there is a separation of 7.82’. We are
unable to raise our profile any higher due to the fact we would prevent drainage from adjacent lots to reach the street,
effectively ponding water on private property.
Please let me know if this design will be acceptable with Atmos in regards to our paving profile. If you have any
questions or would like to discuss, please feel free to call or e-mail me.
Thanks,
Andrew
Andrew Luce, P.E.
Project Manager
1100 Macon Street
Fort Worth, Texas 76102
817.336.5773 Main
817.665.8208 Direct
817.336.2813 Fax
aluce@tnpinc.com
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