Complex sentence: The last service ran on 22 July 1949 with the line formally closed with the passing of the Railways (Upper Darling Range) Discontinuance Act in 1950 and dismantled in 1952.
Split into simpler sentences: The last service ran on 22 July 1949. The line was formally closed by the Railways (Upper Darling Range) Discontinuance Act 1950; it was dismantled in 1952.