Water in New Zealand and are of varying types and origins. Many of the lakes in the central North Island area are volcanic crater lakes, while the majority of the lakes near the Southern Alps were carved by glaciers. Hydroelectric reservoirs are common in South Canterbury, Central Otago and along the Waikato River. Over 180,000 kilometres of rivers has been mapped in New Zealand, the longest being the Waikato River with a length of 425 kilometres and the largest river by volume is the Clutha River with a mean discharge of 533 cubic metres per second. New Zealand has many notable waterfalls, some of
Haast River owned and administered by the Department of Conservation. It is set within the Te Wahipounamu World Heritage site. State Highway 6 follows virtually the complete length of the river, with a bridge near the coast, just after the turnoff to the Haast township. At it is the longest one-lane road bridge in New Zealand, and the 7th longest New Zealand bridge overall. The river is named after Julius von Haast. Haast River The Haast River has its terminus on the West Coast of the South Island of New Zealand. The Haast River drains the western watershed of the Haast Pass.