The Tiwai Point smelter is to get compensation from Meridian Energy as it agrees to cut production to help manage hydro lake levels.
Trustpower's 421,000 retail connections have shaken some interest from potential suitors.
Dual listed infrastructure giant Downer EDI has further deflated its mining interests with the sale of its tyre management business, Otraco.
At the heart of the review will be a new deal on what local government funds versus what central government will pay for.
Infrastructure Editor
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articles by Oliver