The Burlington-Rock Island Railroad (reporting mark BRI) came into existence on July 7, 1930, through the reorganization of its predecessor, the Trinity and Brazos Valley Railway Company (T&BV), nicknamed the "Boll Weevil Line." Like its predecessor, the BRI was jointly owned by the Chicago, Burlington and Quincy Railroad (CB&Q) and the Chicago, Rock Island and Pacific Railroad (Rock Island), with each company owning half of the railroad. "It took its new name from the two owning systems and operated 303 miles (488 km) of track in 1930."