Aqua Tepula

The Aqua Tepula is an ancient Roman aqueduct completed in 125 BC by censors Gnaeus Servilius Caepio and Lucius Cassius Longinus Ravilla[1]: 147 [2]: 339 .

After a (major) reconstruction by Agrippa in 33 BC the aqueduct delivered to the city daily 400 quinariae[4]: §68 (394-5)  -- 17,800 m3 (4,700,000 US gal)[5]: 347 .

Its source was at the volcanic area of the Alban hills on the estate of Lucullus,[6] between today's municipalities of Grottaferrata and Marino, a mere 18 km from Rome.

The conduit was made to join the newly built one for Julia until it reached the current locality of Capannelle near the Aqua Marcia where there was a limaria pool (settling basin) and by which time the water had cooled.

The route passed the Viminal gate, where Termini Station stands today, and ended near the Porta Collina, where the main distribution castellum was, near the current Via XX Settembre.

Route of aqueduct
Map of Rome with Aqua Tepula (red)
The stone arches and channel of the Aqua Marcia (140 BC), with the brick Aqua Julia (33 BC) and minor brick remains of the Aqua Tepula (125 BC) on top, near Romavecchia, Via Lemonia