Here's Some More Calatrava Magic

El Alamillo Bridge

by Santiago Calatrava

Seville, Spain

Originally proposed as twin bridges with a connecting viaduct, this design was to cross the Guadalquivir River in two locations, approximately 1 mile (1.5 kilometers) apart from each other. Because of the the curves of the river, the bridges would have been situated in such a way that their tall inclined masts would have reached toward each other, forming an implied triangle that had it's apex far above the earth.

The design ultimately was built as a single bridge, along with the Cartuja Viaduct. Though it no longer had the same impact as a lone structure, the inclined mast was kept as inititally designed. The extraordinary weight of the concrete-filled steel mast, which angles away from the roadbed at 58º, is enough to support the deck without the need for counter-stay cables or support piers. This was a first in bridge design, and creates a stunning display. The impetus for the project was the 1992 World Fair, "Expo '92." The 1640 foot (500m) viaduct is an entrance gateway to the northern entrance of the Expo. This bridge has roadways for both pedestrian and motor traffic.