built by french engineer gustave eiffel for the caen to saint-lô and vire line, the viaduc de la souleuvre opened november 12, 1893. the total length of the viaduct was 364.20 m (1,200 ft), had a maximum height of 62.50 m (210 ft) and was set on five stone pillars. the height of these pillars varies between 26 m and 60 m, their bases are 18 m by 8 m and their tops are 7 m by 4 m. they were built with granite blocks from the vire region quarries, each of a weight of 350 kg, and with mortar sand from the chausey islands, totaling 14000 m³.