Walouru, New Zealand, 1953
Lehar swept away rail bridge
Bridge Plunge of the Aukland Express
It was Christmas Eve and 285 people were aboard the Wellington-Auckland express travelling home for Christmas. The train was keeping good time as it passed through Walouru and approached the bridge that carried the line over the Whangaehu river.
In the distance Mount Ruapehu, an active volcano of some 9000 feet was erupting. Within its crater was a lake. The forces created within the mountain caused the water to find a sudden exit in cave beneath the Whangaehu glacier. As the massive flow of water left the mountain it gathered volcanic ash and lumps of ice. As it proceeded along the river valley it collapsed the valley sides and collected silt and boulders and other debris so that it formed a "lehar".
It swept down the valley and completely overwhelmed the bridge ahead of the train. The fourth pier was demolished and the fifth damaged. The postmaster in the town of Taihape saw the damage to the bridge and attempted to warn the approaching train by running along the track waving a torch. The driver however failed to see his frantic efforts to avert disaster.
As a consequence of this disaster and the possibility that another lehar could affect any of a number of the valleys in the area, detection equipment was installed on all the rail bridges in the locality.
Copyright © David Fry 1999
This file last updated: Wednesday, 19-May-1999 18:41:47 EDT