 This bridge carries the Peterborough railway line over the Light River.Other settlements in the area had commenced in the early 1860s, and it was not until 1868 that the junction of the two rivers came under notice as a possible site for a township.The Peterborough railway line was built from a new junction at Roseworthy (north of Gawler on what was then the Morgan railway line) to Tarlee during 1868.