PLANS, SPECIFICATIONS & ESTIMATES (PS&E)
Baldwin Avenue-WB Off-Ramp Improvements
As a mitigation measure for the Santa Anita Mall Expansion, Westfield Corporation was required to widen the
westbound off-ramp at Baldwin Avenue. The Mall is located on Baldwin Avenue south of the freeway and the expansion
included construction of new commercial retail spaces, restaurants, and a cinema. Civil Works Engineers was hired
after another engineering firm could not deliver Caltrans approvable construction documents.
The existing off-ramp began as one-lane diverging from the collector-distributor road, terminating with two lanes as a
hook ramp intersecting with Baldwin Avenue (through movement) and Foothill Boulevard (cross movement). The
collector-distributor road which parallels the mainline also services the Baldwin Avenue hook on-ramp.
The improvements included:
• widening the terminus of the WB off-ramp from 2 lanes to 3 lanes,
• constructing an 8 foot high retaining wall with a 14 foot high
soundwall on top, and
• modifying the traffic signal.
Although the construction cost was $1.5 million, (above the $1m threshold) Caltrans Permits agreed to process the
project through an encroachment permit.
The project involved coordination with Caltrans District 7 and the City of Arcadia. Caltrans had a soundwall project
programmed in 2008 for the I-210. The portion of that soundwall which was within the reach of this project was
included within this construction. Sliver right of way acquisition was required. We also prepared Fact Sheets for
non-standard geometrics, a PEER, a Storm Water Data Report, a hydrology study and report, a Water Pollution Control
Plan, and landscape/irrigation plans.