eddyb wrote: Sun, 09 Mar 2025, 11:17
T1 Terry wrote: Sun, 09 Mar 2025, 10:20
How deep were you thinking of tunnelling? Even the Bungonia caves have never been dug out to see if they continue deeper, the sinkhole, a collapsed cave system, has passages in the lower sections that have never really been explored .... or not made public anyway
When they did test drillings in a section of the Snowy 2.0 that they previously had found soft soil, they had water and moving mud blast back out of the test bore hole ..... that wasn't there the last time they drilled ..... The cost started at $2 billion and would be completed in 2021, and everyone gasped, it's now at $12 billion and climbing because they are planning to bring in 4th tunnel boring machine .... I wonder where they plan to bury that one

The optimistic guess for completion is now 2028 .... what renewable energy and energy storage could have been built and now operational for the $12 billion and climbing price tag?
It was insane election time nonsense noise that should have died when the Turnbull govt was defeated, the same as the Maldon/Dombarton rail link ......
https://www.youtube.com/watch?v=kj8wwcM70xk ........ Will Snowy 2.0 end up the same as the Maldon/Dombarton link a huge white elephant?
Can you see why the high speed rail link you are proposing will never happen in our life time?
T1 Terry
There is a certain amount of risk in investment that is why people only try crazy things in time of war but with batteries too heavy and hydrogen too hard, eliminating trucks and planes on this route with a proven SC maglev will reduce prices on the shelf with increased productivity.
Snowy 2 may work well with HVDC cables in it if we start the tunnel ASAP to save the Humelink overhead wires.
I once read it is better for the people who drive the tunnel also to design the segments and with this in mind I think China should design it in consultation with Australia.
Neville Wran stopped Maldon/Dombarton when the bottom dropped out of the coal market so I suppose he thought it was a good idea when he started it.
Nick Greiner killed the Maldon Dombarton rail link, not Neville Wran ..... and he paid out all the contracts even though they didn't complete the work

They ignored the stress it would put on the road network when the Balmain coal loader closes and the Glebe Island grain terminal closed ... it was basically a case of killing off any projects the Labor govt started.
Even though so much of it is still there, the corridor is still there, 1 bridge and one tunnel to finish the project, but since 1988 it has had more money spent of feasibility studies than what it would have cost to finish it, but it still remains unfinished.
The rail line from Ouyen through to Tailem Bend in South Australia, sits idle, because some one decided it would be easier to truck the grain rather than rail, even though everything is set up all the way along the rail line for it to continue to be transported by rail. The end result is a heap of dead towns now the silos are no longer operating .....
Don't confuse sensible with the way govts operate, the palm greasing and on going political party funding for both sides would be cost prohibitive to break the grip those who benefit from the road transport remaining already have on govts.
Did you watch the video, they even mentioned using the route for a mag lev ultra fast line to link Syd, Wollongong and Canberra, but John Howard knocked it on the head .... because, yet again, it was a Labor initiative and "he wasn't going to fund that sort of risky unproven technology"
T1 Terry