HomeMy WebLinkAboutPIP 98-03; Cornerstone Corporate Centre Lot 7; Planned Industrial Permit (PIP) (14)-..
January 8, 1998
Newport National Corporation
5050 Avenida Encinas, Suite 350
Carlsbad, California 92008
Attention: Mr. John Couvillion
Subject: CORNERSTONE CORPORATE CENTER
PALOMAR AIRPORT ROAD
CARLSBAD, CALIFORNIA
GEOGRID SLOPE REINFORCEMENT
Dear Mr. Couvillion:
In accordance with the request of Ms. Mary Miller of Ninteman Construction, we have reviewed the
revised stability calculations prepared by Stable Earth Systems for the Geogrid-reinforced slope
along the south side of the project. The revised calculations, which were transmitted to us by
facsimile from Ms. Miller on December 4, 1997, were performed to determine whether the vertical
spacing of the Geogrid layers could be increased while still maintaining a factor of safety of 1.5
against deep-seated failure of the slope. Our review of the calculations indicate that the spacings
indicated on the attached cross section result in a factor of safety of 1.5 for gross stability. It is our
opinion that the revised spacing of the Geogrid is satisfactory, assuming that strength parameters for
the Geogrid material specified in the design is the same as that used in construction.
If you have any questions or if we may be of further service, please call.
Very truly yours,
Geocon Incorporated
hJ85q- Michael S. Chapin
CEG 1 149
GE 2248
-L
MC:dar
(2) Addressee
(l/Fax) Ninteman Construction
Attention: Ms. Mary Miller
1
6960 Flanders Ixive w San Vi, California 92121 -2974 w Telephone (619) 558-6900 w Fax (619) 558-61 59