The first bridge

In fact, there are two bridges on this picture. At the end of the sixties, the whole road was rebuilt with costly means. The first (lower) bridge was made seemingly indestructible, with 50 cm thick armoured concrete. But, some years later an avalanche blocked the bridge upper inlet, pushing the river away from its bed, over the road behind the upper pier of the bridge. With such a strong flow the road was soon washed out. This new wooden bridge is one of the many, since then to overcome this new gap. But the flow will soon achieve the destruction of the upper pier of the concrete bridge from its rear, destroying both. Of course, costly emergency reparation of the upper pier would be possible, but so far I know, this upper pier is not anchored on the rock, but on alluvial debris. So, the problem will soon recur.

 

The secular battle at this point is probably desperate for humans. A more aerial concrete bridge implies complex corrections of an allready steep road and is vulnerable to rocks and avalanches hits. Having many years to turn around this problem, I think the best is probably a tunnel under the river, turning it from behind, since just above, the are very steep rapids, directly on the cliffs.

Done