HomeMy WebLinkAboutCDP 16-29; LINCOLN RESIDENCE; TEMPORARY BASEMENT EXCAVATION PROPOSED; 2019-08-01HETHERINGTON ENGINEERING, INC.
SOIL & FOUNDATION ENGINEERING • ENGINEERING GEOLOGY• HYDROGEOLOGY
August 1, 2019
Project No. 8081.2
Log No. 20606
Robert Hall Constmction
34145 Pacific Coast Highway, #332
Dana Point, California 92629
Attention: Mr. Robert A. Hall
Subject: TEMPORARY BASEMENT EXCAVATION (Southeast Side)
Proposed Single-Family Residence
5198 Shore Drive
Carlsbad, California
References: 1. "Geo technical Investigation, Proposed Single-Family Residence, 5198
Shore Drive, Carlsbad, California", by Hetherington Engineering, Inc.,
dated November 14, 2016.
Dear Mr. Hall:
2. "Temporary Basement Excavations, Proposed Single-Family
Residence, 5198 Shore Drive, Carlsbad, California", by Hetherington
Engineering, Inc., dated July 23, 2019
3. "Grading Plan For: Lincoln Residence (5198 Shore Drive)", prepared
by Duca-McCoy, Inc., undated (Sheets 1 through 6).
In response to the request ofBabaq Taj, Engineering Manager, Construction Management
and Inspection, City of Carlsbad, we are providing this letter addressing the temporary
basement excavation along the southeast side of the site. The basement excavation for the
proposed single-family residence consists entirely of cut to finish grade. Cw.Tent
conditions on the southeast side of the basement excavation consist of a temporary 5-feet
high vertical cut with an approximately 3-feet high, 0.7: 1 (horizontal to vertical) to 1: 1
(horizontal to vertical) temporary slope above. The temporary basement excavation along
the southeast side of the site is considered stable for the period of time necessary to
constrnct and backfill the proposed basement retaining wall from a geotechnical
standpoint. Construction of the basement retaining wall and backfill should proceed as
rapidly as possible. The Geotechnical Consultant should observe the temporary basement
excavation on a daily basis.
5365 Avenida Encinas, Suite A • Carlsbad, CA 92008-4369 • (760) 931 -1917 • Fax (760) 931 -0545
333 Third Street, Suite 2 • Laguna Beach, CA 92651-2306 • (949) 715-5440 • Fax (760) 931-0545
www.hetheringtonengineering.com
TEMPORARY BASEMENT EXCAVATION (Southeast Side)
Project No. 8081.2
Log No. 20606
August 1, 2019
Page2
This oppo11unity to be of service is appreciated. If you have any questions, please contact
our office.
Sincerely,
HETHERINGTON ENGINEERING, INC.
au A. Bogseth
·ofessional Geologist 3772
~ C~g=-h-am--n11.
Civil Engineer
( expires 3/31/20)
Distribution: 2-Addressee
1-via e-mail Robe11 Hall (RHC493@cox.net)
1-via e-mail Bruce Lincoln (mvznl@aol.com)
}-via e-mail Jason Gelde11 Gason.geldert@carlsbadca.gov)
1-via e-mail Dave Rick (David.rick@carlsbadca.gov)
1-via e-mail Babaq Taj (babaq.taj@carlsbadca.gov)
1-via e-mail Ali Luedtke (Alison.luedtke@carlsbadca.gov)
HETHERINGTON ENGINEERING, INC.