SS9901-CS040714 (2)Turner Collie _ Braden Inc.
Engineers · Planners · Proiect Managers
17300 Dallas Parkway
Dallas, Texas 75248
Tel: (972) 7½5 3000
Fax: (972) 735-3001
July 14, 2004
TC&B Project No. 052131124.0001
Rick O'Dell
City of Coppell
P.O. Box 478
Coppell, Texas 75019-4409
Re:
City of Coppeli
Deforest Road Lift Station Improvements
Force Main Line D
Project No. SS 99-01
Dear Mr. O'Dell:
This letter is response to our conversation regarding the inspection of the HDPE piping after
installation. Item 6.7.2.(c) in the North Central Texas Council of Governments (NCTCOG)
Standard Specifications for Public Works Construction (3rd Edition), which are incorporated into
the Contract Documents for Force Main Line D by reference, requires visual inspection of installed
sewer mains by photographic means when so desired by the Owner.
In lieu of visual inspection, we have no objection to passing a mandrel through the pipe to verify
the pipe shall perform the function for which it was designed and constructed. Based on the inside
diameter of the 30-inch diameter SDR 17 HDPE piping, plus the internal beads at the joints, the
use of a 24-inch mandrel is appropriate for this purpose.
If you have questions or require additional information, please call me at 972-735-3056.
Sincerely,
Erika K. Cooper, P.E.
Project Engineer
cc: Ken Griffin, P.E. - City of Coppell
Engineering [xct, llence ~or Over One-Half Century
972 735 3002
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Turner Collie Braden Inc.
Engineers · Planners · Project Managers
17300 Dallas Parkway
Suite 1010
Dallas, Texas 75248
972-735-3000
Fax: (972) 735-3001
DATE: Ju~y14, 2004
TO: Rick O'Dell
C' e,
)M: Erika Cooper
# OF PAGES [includin
FAX NUMBER: (972) 304-3570
PHONE NUMBER: (972) 735-3056
(If t~ansmittal is incomplete or unclear, please
cell sender diree#y at this number.)
REMARKS:
Rick,
Attached please find the letters regarding visual inspection / use of a mandrel on Line D
and required information from the Contractor during installation of Line A. The originals
will be mailed to you, and copies will also be sent to Ken Griffin. I have also included
draft transmittal letters from you to the respective Contractors for your use if desired. I
can email these to you so you have them electronically if you would prefer. Please let
me know if there is anything else we can assist you with.
Thanks,
Erika
An AECOM Company
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July 14, 2004
Ben Bishop
MasTec North America, Inc.
4747 Irving Blvd_ Suite 221
Dallas, TX 75247
City of Coppell
Deforest Road Lift Station Improvements
Force Main Lines~ "C)"
Project No. SS 99-01
Dear Mr. Bishop:
Please refer to the attached letter from Turner Collie & Braden, Inc. (TCB) regarding the
inspection of the HDPE piping at, er installation. All sections of HDPE piping installed must be
visually inspected in order to verify the pipe shall perform the function for which it was designed
and constructed. The City will allow Mastec to pass a mandrel through the installed pipe in lieu of
visual inspection. Mandrel size shall be as specified in the attached letter.
If you have questions or require additional information, please call me at 972-304-7090.
Sincerely,
Rick O'Dell
Construction Inspector