In 2019 the team of Queen’s University opened three trenches near the hypogaeum of Clepsina. The first allowed to investigate the layers abutting the SE wall of the cavaedium and its foundation trench. Finds have confirmed the dating of the hypogaeum to the beginning of the second quarter of the 3rd c. B.C.E., previously established on epigraphic basis.

In the second trench the team excavated a complex stratigraphic sequence with post holes and trenches dating back to the Iron Age.

In the third trench beaten earth floors and holes have been investigated. This appears to have been an open area, perhaps for productive activities. Associated finds date to the archaic age.
The team also worked in the N-S tunnel leading into the underground chamber. It was already apparent that the original floor level had been lowered digging into the bedrock. Excavation of the fill revealed that the trench is very deep and gets wider. A crude rock-cut stairway descends into the trench, but its landing has not been uncovered yet. Further excavation will clarify the nature of this structure, which blocks access from the North stairway.