WA9601A-CS 990519 SHIMEK, JACOBS & FINKLEA, L.L.P.
CONSULTING ENGINEERS
8333 Douglas Avenue, #820 Dallas, Texas 75225-5816/~~ ~(~14) 361-0204 Phone (214) 361-7900
ROSS L. JACOBS, P.E.
RONALD V. CONWAY, P.E.
JOHN W. BIRKHOFF, P.E.
JOE R. CARTER, P.E. ~/~"~May 19, 1999
GARY C. HENDRICKS, P.E.
[. C. FINKLEA, P.E. ~ ~
Mr. Bob Fox
Fox Con tactors, Inc.
Post Office Box 951
Midlothian, Texas 76065
oppell, Texas
Sandy Lake Road Waterline
Wagon Wheel Ranch Elevated Tank to Denton Tap Road
Dear Mr. Fox:
In accordance with sheet 10 of the construction plans, the waterline under Sandy Lake Road between stations
101+80 and 105+87.25 is to be back-filled with flowable backfill (NCTCOG Item 2.1.5e). After discussion
with Larry Davis, the City's inspector and the City's testing laboratory, StanTech Engineering, it is our
understanding that cement treated soil was placed instead of the specified flowable backfill. Since the
specified material was not installed there is uncertainty as to the type of material and its in situ properties.
Providing a stable foundation for the new pavement over the waterline is of utmost importance to prevent
future pavement failures and as such, the properties of the installed backfill needs to be determined.
Please provide the material specifications and delivery tickets for the backfill that was installed so that we can
determine whether the backfill installed can be considered as an equal to that specified in the construction
plans. Depending on the material placed and results concluded by the City's testing laboratory, the City may
consider allowing the material toremain in place or be removed and replaced with the specified backfill. The
permanent pavement repair at this location shall not proceed until you have received written direction from
this office.
If you have any questions, please contact this office.
'S incere~~
Sincerel ,
' Gary C. I~endricks,' P.E.
Enclosures
cc: Mr. Kenneth M. Griffin, P.E.
r./~f~arry Davis
Stan Tech Engineering h.
9200 King Arthur Drive
Dallas, Texas 75247-3610
P hone 214/631-4372 Fax 21 4/631-4380
May 13, 1999
Mr. Larry Davis
255 Parkway Blvd.
P.O. Box 478
Coppell, Texas 75019-4409
RE: Sandy Lake Road Waterline
CoppeD, Texas
ST No. 1599-0152
Dear Larry,
In response to a request for information ~om Paul Carline of Shimelc, Jacobs &
FinIdea, concerning placement of flowable fill for trench baclcfil!~ StanTech has reviewed our
repon ofjobsite activity and our findings are as follows:
April 26, 1999- City of Coppell Inspector, Larry Davis called StanTech Engineering
Co. and requested a StanTech Technician to obtain a sample of
flowable fill on Tuesday April27, 1999.
April 27,1999- StanTech's representative arrived at the jobsite to sample flowable fill
at 2:00 pro. At that time, no flowable fill was being placed. The
contractor informed our Technician that he was expecting a load of
flowable fill anytime. A delivery of cement treated soil arrived shortly
there after and was being placed at an area between Sta. 102+50 to
Sta. 102+85 and to a depth of approximately 7' below grade. This
cement treated material was premixed offsite and was not in a
flowable state at the time of placement. No samples were taken at that
time.
If you should have any questions or need any assistance in any way, do not hesitate to
give me a call.
Respectfully submitted,
StanTech Engineering Co.
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