October 2026 Construction Update - BART Silicon Valley Construction Project

West Portal

100% Excavation: In early September, our project celebrated 100% completion of excavation work for the West Portal Launch Structure, which will serve as the starting point for the project's Tunnel Borning Machine (TBM.) Since first breaking ground in 2024, our crews have made tremendous progress on the site and will now be in the final stages of preparation on the launch structure before receiving the TBM later next year. 

Safety Record: Our project also recently celebrated 3,000,000 safe work hours without a worker missing time due to injury. This is a massive achievemnt, and we want to recognize our hardworking crew members, who have been committed to keeping safety at the forefront of this project.

• More information can be found in VTA's BART Silicon Valley Phase II Achieves 3 Million Safe Work Hours announcement. 

Upcoming construction activities include continued construction of the Cut & Cover Working Slab, ongoing Caterpillar Shaft Working Slab construction, and continued Cut & Cover Bracing Removal activities between levels 2 and 4. These activities continue to advance construction of the West Portal Launch Structure.

In October, work activities at West Portal will occur Monday through Saturday 24 hours a day.

Day and Nighttime Work Includes:

• Cut and Cover Concrete Working Slab Construction - Crews will complete the construction of the working slab in the cut and cover section. Expect crane and concrete pump activity, haul trucks removing material and continuous construction noise. 
• Caterpillar Shaft Concrete Working Slab Construction - Crews will continue construction of the working slab for the caterpillar shaft. Expect crane and pumping activity, haul trucks removing material and continuous construction noise.
• Cut and Cover Bracing Removal - Crews will continue removal of temporary bracing between levels 2 and 4 in the cut and cover section. Expect lift activity and intermittent steel handling noise. 

Weekend Work Includes: Routine on-site maintenance with minimal anticipated impacts to the surrounding area. 

Future Downtown San Jose BART Station Area

• AT&T Cutover Activities: Beginning in October 2026, AT&T and Lumen crews will be working in the downtown area to transfer existing fiber services to the newly installed conduits via their manholes (cutover activities.) Residents and businesses may notice AT&T and Lumen pickup trucks, small work crews and traffic cones around manholes.  No significant impacts to vehicle traffic are anticipated during these operations.