North Fork Bridge, Railway bridge in Plumas County, United States
The North Fork Bridge is a railway bridge that crosses the North Fork Feather River, linking two tunnels of the Western Pacific Railroad line in California. The structure is made of reinforced concrete and spans the river valley to carry train traffic.
The bridge was built in 1957 to carry the railroad across the valley following plans for the Oroville Dam project. The work was part of broader infrastructure development in the region.
The bridge represents a milestone in American engineering as it holds the record for being the longest reinforced concrete railway bridge in the United States.
The bridge sits in a remote mountain area and is best reached by car, as it runs along the active railway line. Visitor access is limited since this remains functioning railroad infrastructure.
The structure ranks among the longest railroad bridges made of reinforced concrete in America and shows impressive engineering skill of its era. The design had to account for high water levels of the newly formed reservoir.
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