Australia is converting a former gold mine in Far North Queensland into a pumped-hydro energy storage facility called the K2-Hydro project. This initiative will use two disused mine pits for upper and lower reservoirs, with a capacity to store 2,000 MWh of electricity—enough to power approximately 143,000 homes for eight hours. The project leverages existing mining infrastructure such as cleared land and roads, reducing construction costs and environmental impact.
Written locally by qwen2.5:14b on 2026-09-27,
using this article's own text rather than the other coverage of the
same event (that is the story summary below).
Australia's Kidston Renewable Energy Hub is repurposing a former gold mine in Far North Queensland into a pumped-hydro energy storage facility.
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Hub → repurpose → facility
The K2-Hydro project will use two disused mine pits as upper and lower reservoirs, with a planned capacity of 250 MW and 2,000 MWh of storage, providing approximately eight hours of energy storage.
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project → use → storage
According to the Australian Renewable Energy Agency, the facility is designed to store electricity and release it when demand is high, with a start-up time expected to be less than 30 seconds.
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time → accord → it
The project will also reuse existing mining infrastructure and connect the renewable energy hub to the national grid through a transmission line.
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project → reuse → line
How are former gold mine pits used for pumped-hydro storage
The K2-Hydro system is designed to use the former mine pits rather than constructing entirely new reservoirs.
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system → use → reservoirs
The project will effectively turn the existing pits into a large energy storage system.
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project → turn → system
Water is pumped into an upper reservoir when electricity prices are low and is later released through reversible turbines into the lower reservoir to generate electricity when demand is high.
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demand → pump → electricity
The agency described the mine's massive open-cut pits as being repurposed to hold water for energy storage.
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agency → describe → storage
According to The World Economic Forum, the project will source water from groundwater and rainfall.
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project → accord → groundwater
It also says the existing mining infrastructure, including cleared land and roads, is being reused as part of the development.
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infrastructure → say → development
The approach is intended to make use of infrastructure already present at the former mining site while combining the pumped-hydro facility with the solar installation.
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approach → intend → installation
The stored energy can then be dispatched when required, including during peak demand or when cloudy conditions reduce solar generation.
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conditions → store → generation
How much renewable energy can the pumped-hydro facility store
The pumped-hydro facility has a planned capacity of 250 MW and 2,000 MWh of energy storage.
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facility → pump → storage
ARENA states that this provides approximately eight hours of storage and would be enough to power 143,000 homes.
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this → state → homes
The agency also reported that the plant was designed with a start-up time of less than 30 seconds, allowing it to respond quickly to shortages in electricity supply.
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it → report → supply
The storage system is intended to work alongside renewable generation at the site.
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system → intend → site
ARENA explained that energy from the solar and wind farms can be supplied to the grid around the clock through the storage system, providing what it described as a dispatchable, on-demand electricity supply.
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it → explain → supply
The World Economic Forum states that the hydro component is designed to store excess solar generation during the day and release electricity during periods of peak demand or cloudy conditions.
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component → state → demand
PC: Australian Renewable Energy Agency
How does the project reuse existing mine infrastructure
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project → reuse → infrastructure
The Kidston project also incorporates infrastructure associated with the former mine.
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project → incorporate → mine
The World Economic Forum states that reusing existing mining infrastructure helped avoid some of the land-use and permitting challenges associated with renewable energy developments.
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reusing → state → developments
The project uses cleared land and existing roads, while a 186-kilometre, 275-kilovolt transmission line connects the site to the national grid, according to the World Economic Forum.
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line → use → Forum
ARENA reported that a 187-kilometre transmission line would be required to connect the Kidston Renewable Energy Hub to the National Electricity Market.
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line → report → Market
It said the line was also expected to facilitate the connection of additional renewable generation projects in the region.
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line → say → region
ARENA reported that the pumped-hydro project was expected to create more than 500 direct jobs during construction and support remote and regional businesses and communities.
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project → report → businesses
The Aporia
