Country Estates-LR 920731 reed engineering
GEOTECHNICAL CONSULTANTS
July 31, 1992
Project No. 1153.1
Report No. 1
H.T. Ardinger and Son, Company
c/o Nathan D. Maier Consulting Engineers
Three Northpark
8800 N. Central Expressway, Suite 300
Dalias~ Texas 75231
ATTN: Mr. Michael J. Garrett
Re: Construction Materials Testing
Country Estates
Bethel School Rd. and Harris St.
Coppell, Texas
Gentlemen:
Submitted here are the results of testing and observation of
construction materials at the referenced project. This report
addresses the activities of July 30, 1992.
On the above date, a representative of our firm visited the site to
perform field moisture-density tests on the fill placed in the
residential building pads. Upon arrival, it was noted that
approximately three to five feet of fill had already been placed in
Block A, Lots 5 through 13. Reed Engineering Group did not observe
the removal of vegetation or test the natural subgrade prior to this
fill placement.
Density tests were taken in a test pit excavated by the contractor on
Block A, Lot 5. Tests were performed through this fill to a depth of
2.0 feet. It is estimated that approximately 2.8 feet of fill had
been placed in this lot. Test results are shown on Plate 1.
We were unable to test the fill in Lots 6, 7 and 8 due to the presence
of a stockpile of strippings on Lot 6 and the storage of utility
supplies on Lots 7 and 8.
Approximately four feet of fill was in place in the front half of Lot
9. No fill had been placed in the back half of this lot.
Lot 10 requires approximately eight feet of fill to reach the final
pad grade. Four feet of fill was already in place. A density test
taken on the surface of this fill indicated a compaction level of
about 85%.
2424 STUTZ DRIVE · SUITE400 · DALLAS, TEXAS75235 · 214/350-5600 · (FAX) 214/350-O019
H.T. Ardinger and Son, Company
Project No. l153.1/Report No. 1
July 31, 1992
Page 2
Based on the grade stakes, as much as eleven feet of fill is required
in the southwest and southeast corners of Lots 11 and 12,
respectively. Approximately two feet of fill was in place. Tests
were taken on the top layer of fill and two succeeding lifts.
Compaction levels of this fill were found to be about 99%.
Approximately six feet of fill is required in Lot 13. Four feet of
fill was in place. The compaction of the surface layer of this fill
was approximately 97%.
Due to the large quantities of fill required to bring several of these
lots to final grade, and the unknown condition of the previously
placed fill, it is recommended that the fill be removed from the lots
and replaced in density controlled lifts. Density tests should be
performed on each 8-inch lift prior to placement of additional fill.
If you have any questions, do not hesitate to call.
Sincerely,
Ronald F. Reed, P.E.
RFR/wde
copies submitted: (1) H.T. Ardinger and Son c/o Nathan D. Maier
Consulting Engineers/Mr. Michael J. Garrett
~J(1) City of Coppell/Mr. Larry Davis
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