Complex sentence: SR 13A was formed in 1953, and it was decommissioned in 1969; the entire former route of SR 13A became county roads upon the decommission of SR 13A.
Split into simpler sentences: SR 13A was formed in 1953 and it was decommissioned in 1969. The entire former route of SR 13A became county roads upon the decommission of SR 13A.