HomeMy WebLinkAboutCDP 16-24; PEELLE RESIDENCE ADDITION; PRELIMINARY GEOTECHNICAL LETTER; 2016-06-15ENGINEERING
DESIGN GROUP
GEOTCIVCAI, CM.S1MJOIiMt 4 MCCTUfiA1 CO'SWAUIS F0q RISUMIAI & CUJ(RM. OTRTCt
2121 Mcntiel Road, San Marcos, California 92069. (760) 839-7302. Fax: (760) 480-7477 www.designgroupca.com
Date: June 15, 2016 RECT
To: Lulu and Michael Peelle
2441 Buena Vista Circle
Carlsbad, CA 92008
JUN 242016
CITY OF CPJLSBAD
PLANNING DIVISION
Re: New additions to the residence located at 2441 Buena Vista Circle, California
Subject: Preliminary Geotechnical Letter
Ref.:
1. Preliminary Grading Plan, prepared by Pasco, Laret, Suiter & Associates, dated 6-15-16.
We have prepared the following letter as requested by the City of Carlsbad as part of the discretionary
review for the proposed additions to the existing residence at the above referenced address. We
understand the proposed new improvements will be located on the north and south side of the existing
residence at both the front and the rear, as well as a new pool and other general landscape
improvements.
Based upon our initial site visit the property consists of a relatively flat building pad, flanked to the west,
rear, by a descending slope to the lagoon below. The existing site is developed with a single story
residence founded on slab on grade floors.
The following general recommendations are provided as part of preliminary design consideration. At
the time of this report a geotechnical investigation has not been conducted.
New foundation, including pools and retaining wall, shall be located in competent material and
maintain a minimum distance to daylight. Depths of competent material to be determined by
project soils engineer prior to foundation construction.
Our review of the preliminary grading plan, Ref. 1 above, indicates proposed new lined
bioretention areas along the top of the slope. Under no circumstances should water be allowed
to pond against or adjacent to foundation walls, or tops of slopes. Any proposed infiltration
should not be located adjacent to the top of slope, but at a sufficient depth and/or distance
away from the slope so as not to cause slope instability. Underdrain and subdrain detailing may
be necessary.
In our opinion, based upon the proximity of the new additions and anticipated deepened
oundations at the pool, new structures and improvements can be designed such that they will
not adversely impact the slope stability of the rear slope.
EDG Project No. 165620-1
If you have any questions with regards to the above recommendations, do not hesitate to call our office.
Sincerely.
C
c
,
Steven Norris Erin Rist
Califorria GE 2590 California RCE 65122
EDG Project No. 165620-1