build HSR California

San Joaquin River Viaduct & Pergola


The San Joaquin River Viaduct is an approximately 4,700-foot structure that will span the San Joaquin River in north Fresno and the Union Pacific tracks parallel to State Route 99. It will feature arches representing the northern gateway into Fresno, and a pergola structure to allow high speed trains to cross over the top of the Union Pacific tracks.


In north Fresno, parallel to SR 99 from the San Joaquin River to approximately Herndon Avenue.


The foundation for the pergola structure is taking shape on the San Joaquin River Viaduct next to State Route 99 at the Fresno/Madera County line. The viaduct will carry high-speed trains over the existing freight tracks and form one of the largest structures on this first phase of high-speed rail construction. A total of 198 girders, each 121 feet long and weighing approximately 156,000 lbs. are being lifted with a crane and slowly lowered into place to form the pergola lid. Concrete is then poured on each side of the structure to lock the girders in place and form a solid foundation for the high-speed train tracks.


This project began in the summer of 2016 and is expected to take approximately three years to complete.

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