Found on the internet, this is the original route of the Wairarapa Line between Melling and Haywards. This route closed in the mid 1950s with the section terminated at Melling. It was replaced by the Hutt Valley deviation which was a new line that had been built in the 1920s to open up the major part of the valley for residential settlement.
A similar view today showing the four line highway that extends out across the river bed next to where the railway used to run.
