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Watermills, millraces, dams and weirs

Exploring alternatives to losing the Wilson weir

Warkworth watermills millraces and weirs

A more apposite topic for the next town-hall talk could scarcely be conceived. The fact that such a topic has already been conceived, is another story, hopefully for the following Warkworth Town Hall Talk. On Wednesday 13 March, the historian…

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Millrace to the rescue of whitebait and weir

Millennia before human habitation, the natural sandstone weir at the Mahurangi River tidehead would have formed a formidable barrier to īnanga in their imperative to migrate from the sea to freshwater reaches. Then, over about the last 6000 years, towards…

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Warkworth, the watershed, and the whitebait

Mahurangi was always going to need all the help it could get. When, in 2004, the then Auckland Regional Council announced a $3 million, 5-year kickstart to address the harbour’s elevated sediment accumulation rate, Mahurangi Action was advised…

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Energy and the dammed Mahurangi

Dam the Mahurangi River and generate electricity. Such a proposal would face fierce opposition. But what if the dam was already in place; built more than a century since. The dam, otherwise known as the Wilson cement works weir, is located almost…

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