Alameda Corridor East, Temple Avenue, Los Angeles, CA
Alameda Corridor East, Temple Avenue, Los Angeles, CA


Alameda Corridor East (ACE)

Start Date

2001 (2006)

Completion Date

March 2002 (2010)

DYA Client

HDR Engineering, Inc.

Project Description

Diaz•Yourman & Associates (DYA) provided geotechnical services for the realignment of a railroad at Alameda Corridor East and Temple Avenue. The project included four miles of new railroad track, which included four new bridges, retaining walls, and several miles of sound walls. Additions to three spans of highway overheads were also constructed. DYA coordinated and participated in the field investigation, which consisted of 45 borings and provided engineering calculations for a variety of different engineering problems, including bearing capacity, elastic and consolidation settlement, and the vertical and lateral capacity of vertical piles. DYA prepared a design report in general accordance with Caltrans requirements.

Gary K. Gilbert, PE, GE – Geotechnical Engineer
Allen M. Yourman, Jr., PE, GE – Geotechnical Principal

Our Services


  • Site and route evaluations
  • Geologic hazards
  • Seismic design
  • Site characterization
  • Subsurface drainage
  • Grading
  • Ground improvement
  • Slope stability
  • Foundations
  • Dynamic analyses
  • Pavements
  • Instrumentation


  • Material sources
  • Construction observation and testing
  • Verification of anticipated conditions
  • Evaluation of changed conditions
  • Foundation installation
  • Instrumentation
  • Claims evaluation


  • Site characterization
  • Remediation
  • Solid and liquid waste disposal
  • Landfill
  • Aerially Deposited Lead (ADL) Studies
  • Phase I Initial Site Assessments (ISA)
  • Phase II Hazardous Waste Studies
  • Sustainability


  • Forensic investigation
  • Litigation support

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