HomeMy WebLinkAbout30577 (202)W a
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Bob Dickey Geotechnical
Incorporated
May 20, 1983
Corner Construction
c/o Duco Engineering
20938 ('urrier Road
Walnut, CA 91.759
At(-enLion: Mr. Ron Cobine
S(,ibje(,,t: As -Graded Geologic Report of Rough Gradii"ig
Lot 65, Tract No. 30577
Falcon's View Drive, "The Country"
Diamond Bar, County of LosAnqe1es
Dear Sir:
Tj,ji.S geologic report has been prepared to provide a
record of geologic conditions encountered durii-ig rough qrad:ing
of the st.ibject lot in Diamond Bar. W(,-,)rk for this report has
j,jj(-,aJ,uded two site inspections, one on April 12, 1983 when the
stabi.lizat.J.on fill. keyway was op(,,n, and one on May 1.9, 1983
when the retaining walLs excavations for the residenCe:' were
completed. This work has been based upon the 20-scal(- P"Jot
Plan, a portion of which forms the base map fox- the attached
geo.-)gic notes. Bedding plane attitudes were measured and
compared with those reported by Richard Mills Associates in
their report "Geotechnical Investigation Lot 65, Tract 30577,
dated May 1.3, 1977.
c.... Fin_dijn_gS
Geologi.(a conditions encountered during rongh grading
inspections were essentially as anticipated. rhe bed -rock
siltstone and sandstone was found to be incl-,ined mostly along
1,'?14") Viei CaHos. S,-tn Jir n CA 1) ? 6 7 9 ("7141 859-0-W7
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Corner Construction - Falcon's View Drive
May 20, 1983
Page Two
the bac kslopes of the excavations, with a few local areas of
out -of -slope bedding dips. (See the attached map.) 'I'he
stabilization fill. is expected -to provide a stable slope.
Grading conducted to date and inspected by this writer is
geo.log.-ically satisfactory and therefore &.pproved. Cori st. ruction
work completed in accordance with good e=ngine er.,ii,ig practice
and properly maintained is expected to provide a developit ent
free from landslides, settlement and significant distress.
1'urther significant grading on the site should be prereviewed.
by the soils engineer and geologist prior to construction.
Thank you for this opportunity to be of servi.ce on
thi,s interesting project. This study has been conducted in
accordance with generally accepted practice in the f,,Le l.d of
engineering geology. No further warranty if offered or. imp].Jed.
FIlease call, (714) 859-0367 if there are any questions.
Respectfully submit,ted,
BOB DICKEY GEoTECHNICAL INCORPORATI,,I)
13Y
R. H. DICKEY, RG 301: ', LAG 914, RCE 26945
R111.):mb
Attachment: In--Gradiviq Geoloqi.c Notes
D i.stribuL ion: (6) Duco Engineerinq (with in 7oice)
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