Technical observations about a possible new portion of the Aqua Iulia Roman aqueduct in the municipality of Ciampino (Italy).

Abstract An intersection of two roman glareatae roads and an underground stretch of a Roman aqueduct (rivus subterraneus) were found in the locality of Colle Oliva, during an emergency archaeological investigation (between 11/2018 and 3/2019). The aqueduct has been detected in several test trenches and some profiles have been obtained. These data shade some light about the Roman hydraulic technology and they show how the land morphology affected the shape and the path of the aqueduct.