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