Complex sentence: Chartered in 1827, the South Carolina Canal and Railroad Company ran a 136 mile line from Charleston, SC to Hamburg, SC beginning in 1833, and at that time may have been the longest railroad in the world.
Split into simpler sentences: Chartered in 1827, the South Carolina Canal and Railroad Company ran a 136 mile line from Charleston, SC to Hamburg, SC beginning in 1833. In 1833 the line may have been the longest railroad in the world.