A diagram from the report which shows how the 90-100 dam of loose scoria and ash is likely to be permeated by lake water as the lake level rises 6-7metres above the old level. The water is likely to pipe through the rubble, causing it to fail. The report points out that it will take 3-5 years for the lake water to rise to this level, at present being some 90 metres below the old lake level.
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Ruapehu Bulletin, 24 June 1997, Page 6
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77A diagram from the report which shows how the 90-100 dam of loose scoria and ash is likely to be permeated by lake water as the lake level rises 6-7metres above the old level. The water is likely to pipe through the rubble, causing it to fail. The report points out that it will take 3-5 years for the lake water to rise to this level, at present being some 90 metres below the old lake level. Ruapehu Bulletin, 24 June 1997, Page 6
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