The Waiareka scheme was opened in 1976 and takes 450 litres per second of water from the north side of the Waiau River at an intake point east of the Waiau Township. Water is fed into a settling pond with two fish bypass races adjacent to the fish screen leading back to the river. The fish screen is rotated using a paddle wheel as there is no electricity on site. There are two discharge points for unused water toward the bottom of the scheme.

This scheme waters over 400ha on eight farms by border dyke and spray irrigation from a single flow race on a 12 day rotation. In 2018 a 5km pipe and pond was installed to facilitate the conversion to spray irrigation.

Scheme.  Waiareka

Project Date.  1976

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