HomeMy WebLinkAboutCDP 2017-0044; THOMAS GEESBREGHT ADU; GRADING PLAN REVIEW; 2018-12-12COAST GEOTECHNICAL
CONSULTING ENGINEERS AND GEOLOGISTS
RECORD COPY
Decem her 12, 2018
John and Priscilla Geesbreght
4056 Skyline Road
Carlsbad, CA 92008
Subject: GRADING PLAN REVIEW
Proposed Guest House
4056 Skyline Road
Carlsbad, California
References: SUPPLEMENTAL REPORT
Proposed Guest House
4056 Skyline Road
Carlsbad, California
Prepared by Coast Geotechnical
Dated January 8, 2018
RESPONSE TO CITY OF CARLSBAD
SDRSD C-01 Retaining Wall
Proposed Guest House
4056 Skyline Road
Carlsbad, California
Prepared by Coast Geotechnical
July 2, 2018
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JAN O 8 2019
LAND Ut:VELOPMENT
ENGINEERING
PRELIMINARY GEOTECHNICAL INVESTIGATION
Proposed Guest House
4056 Skyline Road
Carlsbad, California
Prepared by Coast Geotechnical
Dated July 26, 2018
Dear Mr. and Mrs. Geesbreght:
-,./51.,
Date
As requested, we have reviewed the project grading plan, Sheet 3 and sections and BMP Details
Sheet 4, prepared by Civil Landworks, and observed that they have, in general, included the
recommendations presented in our Preliminary Geotechnical Report. The following comments
address the plans from a geotechnical viewpoint.
P.O. BOX 230163 • ENCINITAS, CALIFORNIA 92023 • (858) 755-8622
Coast Geotechnical
COMMENTS
December 12, 2018
W.O. P-674617
Page 2 of 3
1) Cut/fill transitions in the building pad should be overexcavated a minimum of 3.0 feet and
replaced as properly compacted fill as indicated on the plans and preliminary geotechnical report.
However, remedial grading will be required as recommended in the Preliminary Geotechnical
Report and indicated on the plans. Removals are anticipated to be on the order of 4.0 feet or 18
inches below the deepest footing, whichever is greater. However, deeper removals may be
necessary. Additional recommendations will be necessary during the grading phase. All fill
should be keyed and benched into competent Old Paralic Deposits.
2) All fills should be observed and tested by a representative of the Geo technical Engineer. All cut
slopes and temporary slopes should be by an Engineering Geologist. Additional
recommendations may be necessary during the grading/construction phases.
3) The proposed biofiltration basin should be sealed with an impervious liner as recommended and
as shown on the Plans.
LIMITATIONS
The findings and opinions presented herein have been made in accordance with generally accepted
professional principals in the fields of engineering geology and soils engineering. No warranty is
expressed or implied.
The geotechnical reports should be considered as part of these plans. Should any discrepancies
between the geotechnical report(s) recommendations and the plans occur, the geotechnical report(s)
shall take precedence unless otherwise advised by the geotechnical engineer.
Coast Geotechnical December 12, 2018
W.O. P-674617
Page 3 of 3
If you have any questions regarding this report, please contact our office. Reference to our Job No.
P-674617 will help expedite a response to your inquiry.
Respectfully submitted,