Southern Pacific's Lucin Cutoff across the Great Salt Lake, Utah

The Lucin Cutoff is a railway line, which used to include a trestle, crossing the Great Salt Lake in Utah. Built by Southern Pacific between February 1902 and March 1904 across Promontory Point, it bypassed the original Central Pacific Railroad route through Promontory Summit where the Golden Spike was driven in 1869. By going west across the lake from Ogden, Utah to Lucin, Utah, it cut off 43 miles (69 km) and avoided curvatures and gradients. In 1944 it was the site of a train wreck in which 48 people were killed. The trestle was eventually replaced in the late 1950s with a parallel causeway, which is now part of the Union Pacific system.  More here