Scope
Canterbury Regional Council has summarised the scope of the Central Plains Water enhancement scheme as follows;
'The applicants propose to irrigate 60,000 hectares of land between the Rakaia and Waimakariri Rivers from the Malvern foothills to State Highway One. Water will be abstracted at a rate of up to 40 cumecs per second from two points on the Waimakariri River and one point on the Rakaia River. The water will be irrigated directly from the river and via a storage system. The proposal includes a 55 metre high storage dam within the Waianiwaniwa Valley and associated land use applications for works within watercourses.'
The proposed dam would be about 2 kilometres long, with a maximum height of 55 metres, with a base width of about 250 metres, and 10 m wide crest, with a capacity of 280 million cubic metres. The dam would be 1.5 kilometres north east of the town of Coalgate. The two rivers and the reservoir would be connected by a headrace canal, 53 kilometres long, 5 metres deep and 30 metres wide (40–50 metres including embankments). Water would be delivered to farmers via 460 kilometres of water races, ranging in width from 14 to 27 metres, including the embankments.
Read more about this topic: Central Plains Water
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