History of Carlin Tunnel in Timeline
The Carlin Tunnel comprises four tunnel bores situated in Nevada's Carlin Canyon. These tunnels were constructed to navigate a sharp bend in the Humboldt River. Two of these bores accommodate Interstate 80, while the remaining two serve the Union Pacific Railroad. Bridges spanning the Humboldt River are located near the entrances of three of the tunnels—the two freeway tunnels and one railroad tunnel. Each tunnel was built at different times for different purposes. The construction of these tunnels significantly improved transportation through the area.
1903: Southern Pacific Railroad Constructs First Carlin Tunnel Bore
In 1903, the Southern Pacific Railroad constructed the first bore of the Carlin Tunnel. This construction was part of a project to straighten the First Transcontinental Railroad, which previously followed the curves of the Humboldt River.
1908: Near Collapse of Southern Pacific Tunnel
In 1908, a rockslide almost caused the collapse of the Southern Pacific tunnel, prompting extensive efforts to save the rail line.
1939: City of San Francisco Train Derailment
In 1939, the City of San Francisco passenger train derailed on a Humboldt River bridge, resulting in 24 deaths and 121 injuries. The incident was deemed to be an act of sabotage.
1974: Construction Delay at Carlin Tunnel
Construction delays occurred in 1974. Fragmented rock during the boring process slowed progress, resulting in the completion date being pushed back.
September 25, 1975: Carlin Tunnel's Third and Fourth Bores Open
On September 25, 1975, the third and fourth bores of the Carlin Tunnel were officially opened. These bores were constructed as part of Interstate 80 to handle increased traffic flow and higher speeds.
2008: Train Derailment and Bridge Collapse
In 2008, another train derailment west of Carlin caused one of the Humboldt River bridges to collapse. This incident caused significant delays in national rail traffic.