Complex sentence: The bridge was badly damaged by the collision of a river barge in 1870, and although part of the bridge was subsequently replaced, soon the entire bridge would be demolished and in 1886 it was replaced by the stone bridge that stands today.
Split into simpler sentences: The bridge was badly damaged by the collision of a river barge in 1870. Although part of the bridge was subsequently replaced, soon the entire bridge would be demolished and in 1886 it was replaced by the stone bridge that stands today.