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BART - Oakland Airport Aerial Connector

Oakland, CA

Construction Value: $484 Million

The 3.2-mile Oakland Airport Connector (OAC) project was a Design/Build effort that opened in 2015, consisting of an automated guideway system (people mover) direct cable pull, which now connects the Coliseum/Oakland Airport BART Station to the Oakland International Airport (OAK) terminal. 

  • Signet provided special inspection and material testing services including Geotechnical Lab Testing, Soils Compaction, Pile/Pier Observation, AC Observation, Rebar, Concrete, Shop/Field Welding, and UT, High-Strength Bolting, Steel/Specialty Lab Testing, and Proof Load/Torque Testing. Off-site source inspection locations included: Vancouver, Antioch, Napa, Fresno, and Oakland.


San Francisco International Airport (SFO) Expansion

San Francisco, CA

Construction Value: $3 Billion

SFO is situated on 150 acres and has expanded through the decades. A $1 Billion international terminal opened in December 2000, replacing Terminal 2. The extension of the BART system to the airport opened in 2003, allowing passengers to board BART trains at the international terminal and have a one-seat ride to downtown San Francisco or the East Bay. 

  • Signet provided special inspection and material testing services related to Geotechnical Lab Testing, Soils/AC Compaction Observation, Pile/Pier Observation, Batch Plant, Concrete Placement, Steel/Specialty Testing, Rebar Placement, High-Strength Bolting, and Proof Load/Torque testing.

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Carquinez Bridge

Contra Costa County, CA

Construction Value: $500 Million

At 3,465 feet long, the Carquinez Bridge was the nation’s first suspension bridge built in 35 years. With an aggressive bidding schedule requiring everyday work, the bridge is a superstructure with a steel orthotropic deck section that was fabricated in Japan and shipped in three ocean-going barges.


  • Signet provided Quality Control Welding Inspection and testing services for this new bridge after construction had already begun, staffing the project with certified AWS/ASNT inspectors and technicians. 

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