The new trestle became a logistic nightmare (no way to work around it) so it got ditched in favour of a concrete pipe (which can be driven over staight away).
Up at Maitland is Walka Water Works, a public track with "turntable to turntable" operation which is run very efficiently and a 4Km run in spectacular lakeshore scenery. Unloading for visitors is a "work in progress". Again lots of notes taken.