The 2012 campaign saw the completion of the investigation in the areas left open from the previous year, that is, area q situated south of the southern perimeter wall of room 4 and the adjacent sector (area u), separated by wall US 1116. The bedrock was reached in both sectors and the stratigraphic sequence was checked. The excavated areas and rooms were then back-filled. A new excavation area was opened (6 × 5 m) on the northern part of the plateau, between the cistern and room 6, with the aim of further documenting the articulation of the cistern, of which only the eastern half had been excavated thus far.
At the end of the campaign, the cistern’s walls had been exposed to an average height of 60 – 80 cm. They were faced with waterproof opus signinum only traces of which were preserved. The walls were formed by two rather irregular external facings, built of local stones of medium to large dimensions, roughly squared, and bonded with abundant mortar. The core was made up of smaller, irregularly placed stones bonded with mortar.