Aqua Alsietina

The Aqua Alsietina (sometimes called also Aqua Augusta), on the other side of the Tiber, was constructed by Augustus from the Lacus Alsietinus (Lago di Martignano), which lay 6500 passus to the right of the fourteenth milestone on the Via Claudia, to the part of the Regio Transtiberina below the Janiculus. Its length was 22,172 passus, of which only 358 were on arches; and its water was so bad that it could only have been intended for the supply of Augustus's Naumachia, and for watering gardens. Its reservoir was 1800 feet long by 1200 wide (Frontin. 11).

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