Irrigation


Hurunui Water Project

Hurunui 400
The Hurunui Water Project proposes to irrigate land in the Amuri Basin, Omihi, and Scargill Valley with storage provided by a control of Lake Sumner outflows, construction of a dam on the Hurunui South Branch, and river intake near the Mandamus River confluence.  Geotechnical investigation and civil design has been undertaken to provide supporting information for a resource consent application.

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Barrhill Chertsey Irrigation

BarhillChertsey 400
Barrhill Chertsey Irrigation delivers approximately 5m3/s of Rakaia River water to the Rangitata Diversion Race at Highbank power station.  During the irrigation season, water backflows from the station to the Methven check gates.  A small portion of the flow is utilised in the Barrhill Chertsey area for irrigation, the remainder is conveyed to the Ashburton Lyndhurst Irrigation Scheme for a water swap to enable new irrigation intakes.   Development options were reviewed and a preliminary design proposed, which included five siphon intakes and storage ponds, and new infrastructure at Methven check gates to enable water swap (concrete culverts, gates, canals).  

 

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