HomeMy WebLinkAbout; Lots 9 through 15, Carlsbad Ranch Unit 2; As-Graded Conditions; 1997-10-09A GIG Compgny
Leigtiton and Associates
GEOTECHNICAL CONSULTANTS
October 9, 1997
ProjectNo. 4930489-014
To: Carltas Development
5600 Avenida Encinas
Carlsbad, Califomia 92008
Attention: Mr. David Meyer
Subject As-Graded Conditions of Lots 9 Through 15, Carlsbad Ranch Unit 2, Carlsbad,
Califomia,
Reference: Leighton and Associates, Inc., Preliminary Geotechnical Investigation, Carlsbad
Ranch Phase II, Carlsbad, Califomia, Project No. 4930489-003. dated March 23,
1994.
In accordance with yoiu" request, we have prepared this letter summarizing the as-graded
geotechnical conditions of lots 9 through 15 of Carlsbad Ranch Unit 2 located in Carlsbad,
Califomia. Rough-grading of the subject lots is essentially complete resulting in relatively level
sheet graded pads and roadways. All rough-grading was performed under the observation and
testing services of Leighton and Associates, Inc., (Leighton), and in accordance with the
recommendations provided in the above referenced report, the City of Carlsbad requirements,
and reconunendations made during the course of grading operations. This grading essentially
completes the rough-grading for the R&D Lots at Carlsbad Ranch.
All fills placed during this phase of gradmg have been uniformly compacted to a minimum of 90
percent relative compaction as determined by ASTM Test Mthod D1557-91. Prior to the
placement of compacted fill soils, removals of potentially compressible soils (topsoil, colluvium,
weathered Terrace Deposits) were performed.
Site grading did not include the overexcavation of transitions (cut\fill) areas as the locations of
proposed building(s) was imknovra at this time.
In general, the subject lots have been graded in accordance with the currently accepted standards
and are suitable to receive the proposed improvements. We recommend that site building and
site grading plans be reviewed by this office to provide additional geotechnical recommendations
on a lot specific basis.
3934 MURPHY CANYON ROAD, SUITE B205
SAN DIEGO, CA 92 1 23-4425
(619) 292-8030 • FAX (619) 292-0771
We are currently in the process of preparing the fmal as-graded report for the project which will
be issued shortly. This report contains a summary of site grading operations, field and laboratory
test results, as-graded geotechnical maps and recommendations for continued site development.
If you have any questions regarding this report/proposal, please do not hesitate to contact this
office. We appreciate this opportunity to be of service.
Respectfully submitted,
LEIGHTON AND ASSOCIATES, INC.
Kevin A. Bryan
Senior Staff Geologist
Michael R. Stewart,
Director of Geology
G 1349 (Exp. 12/31/97)
KAB/MRS
Distribution: (2) Addressee
(1) The Harrison Company
Attention: Mr. Steve Harrison
(l)William Boyd Intemacional
Attention: Mr. Craig Schlimibohm