Raintree-CS 851127 November 27, 1985
Coppell Municipal Utility District
c/o Pierce-Lunsford Associates, Inc.
3109 Carlisle
Suite 206
Dallas, Texas 75204
Re: Geotechnical Investigation
Utility Backfill
Rain Tree Village
Coppell, Texas
Gentlemen:
In accordance with the request of Mr. Jeff Hawkins with Pierce-Lunsford
Associates, we have advanced two continuous sample borings at locations
specified by others at the above referenced project.
Undisturbed specimens of the subsurface soils were obtained with thin-
walled Shelby Tube Samplers (ASTM D 1587). The soil specimens were
extruded from the tubes in the field, logged, sealed and packaged to
maintain "in situ" conditions, and tranported to our laboratory for
further testing.
Once in the laboratory the samples recovered were visually inspected by
a Geotechnical Enigneer. Moisture Content and Dry Unit Weight tests were
performed on representative samples as requested by Mr. Hawkins. These
test results were then compared to the Standard Proctor test (ASTM D
698) for similar soils on this project based only on the soil descrip-
tion. The percent of maximum dry density values are only an approxima-
tion of what exists in place at the two test boring locations. The
results of our findings are tabulated on the enclosed Summary page.
We trust this information satisfies your present needs. If we can be of
further assistance, please feel free to contact us.
Sincerely,
MAXIM ENGINEERS, INC.
Mark A. Ball
Geot echnical Division
MA B: lb
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SUMMARY
BORING B-1:
Moisture Dry Unit Percent of
Depth Material Content Weight Maximum Proctor
(ft.) Description (%) (pcf) Dry Density Number
0-1 Gray & Yellowish Brown Sandy Clay ....
1-2 Gray & Yellowish Brown Sandy Clay 14 108 97.5 2
2-3 Olive Brown & Gray Clay with Brown Sand 20 95 90.8 1
3-4 Olive Brown Clay with Sand & Gravel 22 102 97.5 1
4-5 Gray Clay 29 83 80.7 3
5-6 Brown Sandy Clay with Gravel 18 107 96.6 2
BORING B-2:
Moisture Dry Unit Percent of
Depth Material Content Weight Maximum Proctor
(ft.) Description (%) (pcf) Dry Density Number
0-1 Olive Brown Clay (Lime Treated) 18 - - -
1-2 Light Brown & Gray Clayey Sand 13 106 95.7 2
with Shale Fragments
2-3 Light Brown & Gray Clayey Sand 14 103 93.0 2
with Shale Fragments
3-4 Brown Clay with Shale Fragments 26 80 83.7 3
4-5 Light Brown and Gray Clayey Sand ....
5-6 Light Brown and Gray Clayey Sand ....
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SUMMARY*
Maxim um O ptim um
Proctor* Material Dry Density Moisture
Number Description (pcf) (%)
1. Olive Brown & Dark Brown Clay 104.6 17.5
2. Brown Sandy Clay with Gravel 110.8 15.8
3. Dark Gray Clay with Shale 99.2 20.4
* Summary of Proctor Tests previously performed at the site during fill placement.