At the Tule River Viaduct in Tulare County, traffic has been rerouted to allow crews to begin substructure work including drilling and setting rebar cages for the future columns of the viaduct. More than 75 columns will need to be drilled and installed to carry high-speed trains over the existing BNSF rail line, State Route 43, and the Tule River. When complete, the Tule River Viaduct will be more than 3,573 feet long.