State Route 4 Bypass Project – Segment 3

State Route 4 Bypass Project – Segment 3On the SR4 Bypass Segment 3 Project we used our large fleet of earth moving equipment, our dedicated and skilled project management staff and our long standing relationships with regional subcontractors and material vendors to successfully complete this four and one half mile segment of new highway.  This project included construction of  two bridges, five signalized intersections and three detention


The State Route 4 Bypass Project (Bypass) was developed by a cooperative effort between Contra Costa County and the Cities of Antioch, Brentwood and Oakley.  DeSilva Gates Construction was the General Contractor for the 4.5 mile long Segment 3 Project. The Bypass became the new State Route 4 through the Cities of Antioch and Brentwood and Contra Costa County. Segment 3, the most southerly section of the Bypass extended as a 2-lane Expressway from Balfour Road south to Marsh Creek Road. The Project also included a 2-lane conventional highway (East-West Connector) along Marsh Creek Road connecting the Bypass to existing SR4 (Byron Highway). In addition, Vasco Road was extended from Walnut Boulevard to Marsh Creek Road to directly connect to the Bypass at Marsh Creek Road. The project constructed new roadway, 4 miles of roadway widening and reconstruction, two bridges, five signalized intersections, three detention basins. Major Project quantities included:

1. 825,000 Cubic Yards of Roadway Excavation

2. 175,000 Cubic yards of Aggregate Base

3. 81,000 Tons of Asphalt Concrete

4. 2,100 Cubic Yards of Structural Concrete

5. 66,000 Square Feet of Soundwall Block

6. 21,000 Feet of Underground Drainage Pipe

Route 4 – Balfour Road to Marsh Creek Road  Brentwood, CA

State Route 4 Bypass Authority

Dale Dennis
SR 4 Bypass Authority Program Mgr.
Telephone # (925) 595-4587


CONTRACT VALUE: $43,497,509

START DATE: November 2006