San Diego and Arizona Eastern Railway

The San Diego and Arizona Eastern Railway (reporting mark SDAE) is a short-line American railroad founded in 1932 as the successor to the San Diego and Arizona Railway (SD&A), which was founded in 1906 by entrepreneur John D. Spreckels. Dubbed "The Impossible Railroad" by many engineers of its day due to the immense logistical challenges involved, the line was established in part to provide San Diego with a direct rail link to the east by connecting with the Southern Pacific Railroad lines in El Centro, California.

Source: Wikipedia — San Diego and Arizona Eastern Railway (CC BY-SA 4.0)