In one part of the upper reaches of the Madison river, a whole mountain began shifting, then came crashing down to fill the deep valley and dam the great river with millions of tons rock and trees.

Nothing is available to fill a void for many children; no good music for them to enjoy before they become rebellious and angry and turn to rock 'n' roll.

For example, it can apply to embankment reinforcement and embankment fill and rock slope defence and pavement crack prevention etc.