The main aim of the 2019 campaign was to clarify the nature and dating of the structures identified by the geophysical surveys. The excavation area was chosen based on the survey images and included both part of the curved structure and part of the smaller rectangular anomalies. A 10 × 6 m trench made it possible to excavate various types of structures identified by the surveys.

The large U-shaped structure was shown to be an imposing well-preserved curvilinear wall, probably datable to the Etrusco-Hellenistic period. A series of rooms identified to the north of this structure were of later date (late Hellenistic-Republican). At present, the material finds do not provide any clue as to the use of the area and structures, although there was evidence suggesting production activities.

The presence of a large walled structure surrounding an area devoid of any occupation evidence and the vicinity of ancient lacustrine layers suggest that it may be interpreted as a basin that was occasionally filled with water, for example a landing place, a dry dock, an arsenal or another infrastructure relating to the lake or the river.