Built in 3 A.D. by two Roman colons , Aimo and Avilio, over the gorge of the Grand Eyvia river, the aqueduct bridge made of stone, about 56 m. high and over 50 m. long, is, in Aosta Valley, one of the most interesting monuments of the Roman Period, still perfectly preserved.

The structure consists of a covered pass and of an upper uncovered  channel; the surface of the channel is covered with paving stones and the walls are waterproof, in order to enable the water  to flow.