It was formed in 1903 as an attempt to break the near - monopoly the Southern Pacific Railroad had on rail service into northern California .
The Western Pacific Railroad ( reporting mark WP ) was a Class I railroad in the United States .
Western Pacific Railroad was formed in 1903 as an attempt to break the near - monopoly the Southern Pacific Railroad had on rail service into northern California .
The Western Pacific Railroad ( reporting mark WP ) was a Class I railroad in the United States .