[asdefghyk]

From Australlian ABC news...

The cost of the Snowy 2.0 pumped-hydro project is estimated to range from \(\$12\) billion to as high as \(\$42\) billion depending on the scope of costs included (such as direct construction, interest, and broader transmission). Originally announced in 2017 with a $2 billion price tag, the project has faced massive scale and logistical blowouts. The cost of the Snowy 2.0 pumped-hydro project is estimated to range from $12 billion to as high as $42 billion depending on the scope of costs included (such as direct construction, interest, and broader transmission).

That said , hydro systems have a LONG LIFESPAN - 100 YEARS ?

Batteries need to be replaced every X years.

So the ecomiomics of the comparisoan would need to be calculated ...

[robin_reala]

Dinorwig[1] was opened in 1984, and is looking at a £1B refurbishment shortly for “at least another 25 years” lifespan.[2]

[1] https://en.wikipedia.org/wiki/Dinorwig_Power_Station

[2] https://www.waterpowermagazine.com/analysis/re-planting-the-...

[angry_octet]

All the complexity has been in geotechnical issues, pockets of mud, sinkholes, then ultra hard rock, then loose shale, damage in blasting operations, needing to pump liquid nitrogen into the rock to deal with subterranean water flow, soluble limestone etc etc.

One of the scariest industrial deaths you can imagine: cutting into a pocket of shale and the TBM and crew just vanishing into the maw of the Midgard serpent and the whole tunnel filling.

https://www.abc.net.au/news/2024-05-22/tunnel-boring-machine...