It interchanged with the Southern Pacific Railroad at Calexico, California, and with the Ferrocarril del Pacifico in Benjamin Hill, Sonora.
Before 1960, The SP-controlled Inter-California railroad provided trackage rights for the SBC from Pascualitos to the International Border.
SP, Kyle Railways and later the San Diego and Imperial Valley Railroad operated the line, paying a fee to the SBC, and later to FNM.
Today the line continues to provide daily modern freight service, including intermodal.
It is now known as Ferromex's Puerto Penasco Subdivision and designated by the SCT as the "U" and "UA" lines of the Mexican rail system.