UBLIC HEARING: Director of Development ... - City of Glendale

4. 1. Earth
fault, located near the base of the San Gabriel Mountains in the northern part of Glendale. Due
to the approximately six mile distance of the Redevelopment Area from this fault, potential
hazards due to fault rupture are not present in the Redevelopment Area. The Redevelopment
Area is not in a potential liquefaction area nor are there static fresh water bodies proximate to
the area in which seiches could occur. Although new development would expose people and
structures to groundshaking in the event of an earthquake, no unusual or unique risk due to
groundshaking would be posed by the Redevelopment Plan.
PROJECT IMPACTS
Grading. Elevations on the site range from approximately 450 feet to 463 feet above
sea level. The major soil association extant on the site is Tujunga-Soboba. A geotechnical
evaluation of the property has determined that the site is generally blanketed by about five to
20 feet of variable fill consisting predominantly of silty, fme to medium sand with occasional
gravel and debris. 8 Underlying the fill soils are native deposits consisting of fine to coarse
silty sand and clean sand. The site is traversed by a 10 to 80 foot wide and 1,100 foot long
drainage ditch running across the site from west to east, which empties into the Los Angeles
River, adjacent to the southern border of the site.
The impact of any inherent soil limitations that may exist on the proposed project site
would be lessened through standard engineering techniques utilized during site preparation. Due
to the relatively variable topography of the site, grading work will be required to bring the site
grade to the desired elevation for construction purposes. In addition, replacement of some of
the existing fill soils may be required. The acceptability of existing fills would have to be
determined at the time of construction. It is estimated that approximately 100,000 cubic yards
of the dirt on site would need to be redistributed in order to bring the site to a level pad and
that approximately 10,000 cubic yards would need to be imported. 9 The size and scope of the
proposed grading operation would not be considered significant with implementation of the
mitigation measures identified in the Earth section of the Program EIR.
Seismicity. Although additional investigation may need to be performed to obtain more
precise information on liquefaction potential once specific building layouts have been
8
9
Dames & Moore. Preliminary Geotechnical Investigation. LADWP Crystal Springs Maintenance Yard.
November 1995. page 5.
Ibid. page 8.
Planning ConsullllnlS Research
Glendale Redevelopment Agency
Page 23
DreamWorks Animation Campus Addendum EIR
. June 1996