In a similar vein is the surge shaft being built as part of the Snowy 2.0 scheme in Australia. 28 metres diameter and 263 metres deep. It absorbs the momentum of the surge of water when the downstream power station closes its valves.
> In a similar vein is the surge shaft being built as part of the Snowy 2.0 scheme in Australia. [...] It absorbs the momentum of the surge of water when the downstream power station closes its valves.
https://www.snowyhydro.com.au/wp-content/uploads/2024/01/SH_...