Popularly known as the “Water Tower Bridge.”

Eduardo Saavedra y Moragas (1829–1912), who used this bridge as a starting point to describe the road between Uxama and Augustóbriga, maintains that the structure contains a great deal of rough ashlar, the masonry is poor and irregular, the cross-section is in the shape of a “donkey’s back”—typical of medieval bridges—and that there are ashlars engraved with initials, which is very characteristic of the Middle Ages. There is also another highly authoritative school of thought, including Carlos Fernández Casado (1905–88), who believes that there are sufficient original materials of Roman origin to substantiate its Roman affiliation: perfectly carved ashlars, especially in the smaller vaults and at the abutments, the courses of stone attempt to maintain the same height; the wedge-shaped buttresses, as well as their masonry, appear Roman; and the epigraphic marks found on some stones are characters from the ancient Iberian alphabet, very common in Roman civil engineering works built with local labor.

In 1753, restoration work was carried out due to the bridge’s deteriorated condition; this was undertaken by master stonemasons José de Oñaederra, Manuel de Arribas, and Gabriel Martínez. The work was supervised by the town’s mayor and by the master builder Fray Antonio de San José Pontones.

On the town plan drawn up by Francisco Coello de Portugal in 1860, it is listed as “restored.”

It consists of three spans with semicircular arches. Between them are two sturdy piers reinforced by two powerful wedge-shaped buttresses and a gabled roof that does not rise above the arch keystones. The walls up to the buttresses are built with irregularly shaped limestone ashlars; in the lower sections, rough-hewn stone predominates, while the tympanums feature larger, well-carved, and well-joined blocks. On the buttresses and spurs, the stone is more uniform. The deck features a gabled roof and thick parapets of dressed and rough-hewn stone, crowned by a thin coping of the same material.

The current road surface consists of boulders and flagstones. There are stone staircases on both sides leading down to the river (left abutment).