Thanks for the comment llyrran! For energy storage, I should have clarified that I have in mind off-river pumped hydro - no damming of rivers involved, just 2 reservoirs with a height differential to store kinetic potential energy.

The Kidston project, supported by ARENA, is pretty cool - they are looking at using the pits from an abandoned gold mine as storage reservoirs. A great way to repurpose an old site without unmanageable ecological impacts.