OPAC Consulting Engineers

BART West Dublin Pleasanton Pedestrian Overcrossings


Dublin, California

Client:

JACOBS
1340 Treat Blvd.,Suite 208
Walnut Creek, CA 94597
Kirk Warnock
Program Manager

Date:

Construction completed 2010
Peer review completed 2009

Scope of work:

Peer Review

Construction cost:

About $40 million (approximate for the entire station)

Services Performed:

  • On-site visual assessment
  • Peer review of design and construction issues
  • Attend meetings with BART, Caltrans and contractor
  • Submit peer review findings

Issues:

  • Inter-agency requirements
  • Welding issues
  • Repair during construction

The BART West Dublin/Pleasanton Station consists of a 320 ft long, two-level station, concourse, a 700 ft long station platform, and two pedestrian freeway overcrossings. The station situates between the active tracks of the BART mainline and in the median of Interstate 580. The pedestrian overcrossings link the station to a parking garage on each side of the freeway.

The location of the project also required significant design and construction coordination with both BART and Caltrans to ensure that standards and specifications were followed at the interfaces of their right-of-way. Special provisions were required by Caltrans that included qualification, workmanship, and inspection requirements for the HSS Tubular Pratt Through-Truss pedestrian overcrossing structure, since this configuration was not a typical Caltrans standard. At the request of Caltrans to have a peer review on these issues, JACOBS engaged OPAC to perform the following tasks as parts of the peer review:

  • Discussions with BART staff.
  • Review of available design documents and design requirements.
  • Verified design criteria and identified design criteria compliance issues.
  • Performed On-site visual assessment of trusses.
  • Studied feasibility of retrofits to comply with design criteria.
  • Recommended retrofits to comply with design criteria.
  • Met with BART, Caltrans and contractor to resolve issues.
  • Studied feasibility of load test on the truss.
  • Submitted peer review findings.