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 creat