One Australian mine that is being developed for pumped-hydro energy storage
is the open-cut
Kidston gold mine in Queensland.
This will be able to generate 250 MW for eight hours (a total of 2,000 MWh of electrical energy).
The Australian Renewable Energy Agency (ARENA) is helping finance a $1.7 million feasibility study investigating the use of the pit of the old Iron Duchess North iron mine on South Australia's Eyre Peninsula, Feb. 2018.
The estimated capacity is 90 MW of power and 390 MWh of energy.
Also in South Australia the Kanmantoo copper mine is expected to reach the end of its life as an active mine in 2019.
It is being investigated for the potential development of a 220 MW power, 1,300 MWH energy pumped hydro energy storage facility.
In 2018 it was estimated that it could be operating by the end of 2021.
an article in International Mining.
An article on the ABC website:
"Coal mine rejuvenation bill could be left with NSW taxpayers" mentions mine pits up to half a kilometre deep in the Hunter Valley of NSW.
These could provide excellent opportunities for pumped hydro energy storage schemes.
In many Australian situations a lack of water can be a problem in developing a pumped hydro energy storage system, in this case there would be no shortage of water, it would seep or rush in from adjacent aquifers; there could well be a problem with too much water.
There are many old mines being considered for their energy storage potential overseas, for example, in Canada, is the
Marmora project in Ontario, with an
expected capacity of 400MW for up to 5 hours.
Its designed average head is 140m.