Complex sentence: The replacement four arch stone double track viaduct over the Nidd was completed in 1851 at a cost of £9,803, the section over the River Nidd connecting to the L&TR was completed 1 October 1851, and the Knaresborough station opened the same year.
Split into simpler sentences: The replacement four arch stone double track viaduct over the Nidd was completed in 1851 at a cost of £9,803. The section over the River Nidd connecting to the L&TR was completed 1 October 1851, and the Knaresborough station opened the same year.