was built using 776,922 cubic ft of concrete and steel sheet piling to hold the water's weight above the roadway and prevent sediment from bleeding onto the road.During the planning phase for the project, drawbridges, ferries, and tunnels were considered possible solutions to allow the road to cross the lake fully. However, these were decided against, and the novel approach of building a short aqueduct over the road was selected.
A tunnel, also likely considered, would have required too much time and expense compared to the aqueduct solution finally settled upon. A bridge, while a more typical solution to the problem, was deemed far too costly compared to the more reasonable cost of the aqueduct solution, at around $61 million. Given that the point at which it was to be built did not need to carry wide water traffic, its narrow aqueduct design was also deemed a wise choice.
just a tunnel without a cover
'El metro en Sevilla no es viable por el tipo de suelo' La película