The Transbay Tube Internal Retrofit Project was a $340 million, six-year seismic upgrade for BART’s most critical transit link between San Francisco and Oakland. As the main connector between the East Bay and the Peninsula, the 3.6-mile-long Transbay Tube is one of BART’s most vital infrastructure assets. This retrofit project focused on enhancing its structural resilience by installing a curved inner steel lining in key sections of the tube and upgrading the pumping system to improve its ability to remove large volumes of water in the event of flooding.

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Montez Group played a key role in quality management, safety oversight, and coordination of the contractor’s Watch Person Safety Program, ensuring compliance with project specifications and maintaining as-built documentation. Our team developed and implemented the contractor’s Quality Program, providing critical oversight to maintain high construction standards throughout the project. Montez Group also managed the Watch Person Safety Program, ensuring continuous monitoring and adherence to strict safety protocols. Through our efforts, we contributed to BART’s goal of enhancing seismic resistance, improving operational safety, and extending the life span of the Transbay Tube for decades to come.