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A contemporary Canberra Times report (as quoted by Tumut local history archives) states Tumut 3 Power Station opened on 23 October 1972; Wikipedia[2] corroborates the station entering service in the early 1970s.
Describes Tumut 3 as Australia's first major pumped-storage power station, commissioned in the early 1970s at 1,800 MW capacity.[1]
Local history archive quoting the contemporary Canberra Times report of the opening date.[1]
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