Snowy starts laying concrete foundations for massive turbines a kilometre underground

20 days ago by Gorgritch_Umie_Killa to c/environment

Construction of the "hydroelectric station the size of the Sydney Opera House" has started laying concrete foundations nearly 1 km underground, Snowy Hydro says.
moldy_rice 4 points 19 days ago

Progress has been slow going on the project, particularly in the tunnel-boring department, and particularly for a particular tunnel-boring machine called Florence, which first got bogged in ground that was too soft and then became wedged in rock that was too hard.

So it got stuck between a rock and a soft place?

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Dimand 2 points 20 days ago

I hope my pessimistic mind is wrong and snowy 2.0 ends up being worth it. I have toured Tumut 3 and it's an amazing work of engineering with decent cost benefits when you look back at it over 50+ years. But even inflation adjusted 2.0 has been ludicrously expensive, and with the progression of solar and batteries I'm doubtful it will ever come close to breaking even.

It has currently cost more than the entire rest of the snowy project ($8-9 billion approx).

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moldy_rice 3 points 19 days ago

The cost in dollars doesn't matter.

The cost in carbon is what matters.

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Gorgritch_umie_killa 2 points 20 days ago

,,

Yeah, absolutely its a problem. All the issues they said at the start of the project have borne out and then more with these unexpected soil issues. I suppose if I were the government in this situation I'd be looking at this as a major works project that may pay off as a grid stabilising mechanism, but has also created a unique workforce 5000 strong. I'd be looking towards what national benefit/s this workforce could be turned to next. Of course I say this knowing Snowy is a unique project, but there'd be crossover with other unique underground tunneling projects or water resource projects. Something that springs to mind is high speed rail underneath the Blue Mountains might have demand for an insane amount of tunneling. I don't know how realistic any of that is though.

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