Pumped hydro storage

You probably remember a previous scheme for pumped hydro at Lake Onslow in central Otago, which was postulated by the previous government as being perhaps useful in New Zealand's low lake level dry years.

You probably remember a previous scheme for pumped hydro at Lake Onslow in central Otago, which was postulated by the previous government as being perhaps useful in New Zealand's low lake level dry years.
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