HomeMy WebLinkAboutMS 16-01; PACIFIC WIND; Third Party Geotechnical Review (FIRST) Pacific Wind; 2021-09-07
September 7, 2021
Project No. 9486.1
Log No. 21597
City of Carlsbad
Community and Economic Development
1635 Faraday Avenue
Carlsbad, California 92008-7314
Attention: Ms. Elissa Tovar
Subject: THIRD-PARTY GEOTECHNICAL REVIEW (FIRST)
Pacific Wind
Carol and Harding Neighborhood Redevelopment
Carlsbad, California
MS16-01
References: 1) “Preliminary Geotechnical Investigation, Proposed Multi-Family
Residential Project, Carlsbad Apartments, APN’s 204-292-01, -02, -10
through -14, -16 through -22, 204-291-14, -16, -17, and -19 through -
27, Carlsbad, California,” by LOR Geotechnical Group, Inc., dated July
31, 2014.
2) “Grading Plans For: Pacific Wind, Carol and Harding Neighborhood
Development,” by SWS Engineering, Inc., dated August 24, 2021
(Sheets 1 through 9).
Dear Ms. Tovar:
In accordance with your request, Hetherington Engineering, Inc. has provided third-party
geotechnical review of Reference 1. The following comments are provided for analyses
and/or response by the Geotechnical Consultant.
1. Due to the age of the report, the Consultant should update Reference 1 to comply with
requirements of the 2019 California Building Code, ASCE 7-16, and City of Carlsbad
requirements.
2. The Consultant should review the project grading plan (Reference 2) and foundation
plans, provide any additional geotechnical analyses/recommendations considered
necessary, and confirm that the plans have been prepared in accordance with the
geotechnical recommendations.
3. The Consultant should provide an updated geotechnical map utilizing the current
grading plan for the project to clearly show (at minimum): a) existing site topography,
SOIL & FOUNDATION ENGINEERING ENGINEERING GEOLOGY HYDROGEOLOGY
(760) 931-1917 Fax (760) 931-0545
333 Third Stree Laguna Beach, CA 9265 (949) 715-5440 Fax (949) 715-5442
Carlsbad, CA 92008-43695365 Avenida Encinas, Suite A
HETHERINGTON ENGINEERING, INC.
www.hetheringtonengineering.com
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THIRD-PARTY GEOTECHNICAL REVIEW (FIRST)
Project No 9486.1
Log No. 21597
September 7, 2021
Page 2
b) proposed structures/improvements, c) proposed finished grades, d) geologic
conditions, e) locations of the subsurface exploration, f) temporary construction slopes,
g) remedial grading, etc.
4. The Consultant should provide a detailed description of proposed site grading,
structures/improvements, foundation type, etc.
5. The Consultant should address impacts to adjacent property and improvements as a
result of site grading and construction.
6. On-site storm water infiltration testing and recommendations should be performed and
presented consistent with The City of Carlsbad Engineering Standards Volume 5 -
Carlsbad BMP Design Manual 2016 Edition. The Consultant should address as
required.
7. The Consultant should provide a list of recommended testing/observations during
grading and construction.
8. The Consultant has provided preliminary asphalt concrete pavement design
recommendations. Final pavement recommendations should be based on R-value
testing of the subgrade souls at the completion of grading.
Please call if there are any questions.
Sincerely,
HETHERINGTON ENGINEERING, INC.
Paul A. Bogseth Mark D. Hetherington
Professional Geologist 3772 Civil Engineer 30488
Certified Engineering Geologist 1153 Geotechnical Engineer 397
Certified Hydrogeologist 591 (expires 3/31/22)
(expires 3/31/22)
Distribution: 1-via e-mail (ldetrackingdesk@carlsbadca.gov)
1-via e-mail (Tim.Carroll@carlsbadca.gov)
HETHERINGTON ENGINEERING, INC.