Complex sentence: A connection at Englewood Station was completed October 15,1971 to allow the Chicago, Rock Island and Pacific Railroad to also operate over the PFW&C to Union Station, but the failing Rock Island decided to continue using LaSalle.
Split into simpler sentences: A connection at Englewood Station was completed October 15,1971 to allow the Chicago, Rock Island and Pacific Railroad to also operate over the PFW&C to Union Station. But the failing Rock Island decided to continue using LaSalle.