Aqueduct bridge

Drawing of a small part of the aqueduct bridge over the river Frailes (6 km SW of Gerena, 250m E from the rubbish-dump, along the A477) Of the 71 piers only 5 are still visible (and properly signposted).
In the cross-section note the opus signinum and both quarterrounds. The major part of this roman aqueduct was made of opus incertum / caementicium