It has survived fire and flood, but it’s the ravages of time that threaten to finally topple Victoria’s longest timber trestle rail bridge. “It’s now or never,” says May Leatch, one of the principal organisers of a campaign to save the historic 770-metre bridge that ushers travellers into Orbost, four-and-a-half hours’ drive east of Melbourne. “It’s reaching the point where if we don’t do something to preserve this structure it will soon be too late to save it.”  In December, the campaign group Save the Snowy River Rail Bridge hung a huge banner from its upper planks, just in time for the annual influx of tourists drawn by the beaches and excellent fishing of nearby Marlo, where the Snowy meets the sea. The office they set up in a dilapidated storefront in the main street of town – its walls covered with photos, clippings and a mural painted by a local artist – has had plenty of visitors too. But much of the support has come from out-of-towners.