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End of the pier shows

Letters

The image of the proposed Millau Viaduct is spectacular.

But I am a little uneasy that there appears to be one pier founded on the steep, rivercut slope.

Higher up the valley is a relatively flat area and then another scarp. Searching at the back of my mind for my O level geography, the landscape looks like a rejuvenated stream. If this is the case, erosion processes there may be active, and I would be concerned about the stability of the slope.

This does seem to have been considered because, according to the article, the location of a pier on the slope contributed to the rejection of a conventional three span cable stay.

Did the analysis of the slope conclude that the slope is safe for a small multispan crossing pier, but not for the larger piers of the conventional three span bridge? Or is the photo misleading?

Simon Bisset, simon. bisset@technical . sefton. gov. uk

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