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SR 4 Balfour Interchange

State Route 4 / Balfour Road Interchange

Enhancing Movement of Vehicles

This new $40 million interchange removed the last at-grade intersection between Brentwood and Walnut Creek, enhancing movement of vehicles and eliminating an intersection with a high accident rate.

The project included significant revisions to State Route 4, three new bridges, protection of a critical water main, extensive utility relocation, drainage structures, a box culvert extension, new and temporary signalized intersections, and improvements to Balfour Road.

Psomas services started with a constructability review of the 90% plans and continued with full construction management services for the entire project.

Services

  • Construction Management
  • Construction Staking
  • 3D Laser Scanning

CLIENT

Contra Costa Transportation Authority

LOCATION

Brentwood, CA

AWARDS

  • CMAA Northern CA
  • APWA Northern California Chapter
  • ASCE SF Section
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