A further period of drought caused the level of the lake to drop by over 60 cm, in some points 12 to 13 m of the lake bed were exposed between the water’s edge and the bank. This revealed a stony stratum along the EN and NW banks. In some cases wooden structures appeared immediately and were visible among the stones, others were below 2.5-5.00 cm of sandy gravel. The stony feature, which in the northern area was perfectly preserved, was an ancient ground surface. As in 2005 the materials scattered over the surface were plotted and levels were taken.

It was decided to investigate part of the northern area. A floor, US 4, was exposed and sampled for xylotomical, dendrochronology and radio-carbon dating, as was undertaken in area E. Thanks to a sample from a horizontal trunk of alder this structure provided an absolute C14 dating of 4840-4710 BC cal.1 σ. Further dating came from a collapsed vertical structure: 4800-4680 BC cal. 1 σ. Pottery fragments were rare and small. The materials collected were dominated by evidence of the lithic industry. A concentration of flint nodules was identified (US 48) which had been tested in order to gauge the quality of the raw material. Given the exceptional nature of the wooden structures and their state of preservation, a cast was made to be left on view in the archaeological park (put on show 7th August 2007). The absolute dating obtained from the posts and planks from the excavated structures and those identified along the eastern bank in 2005, led to the identification of two different settlement phases, within the space of a few metres, with an interval of 100 years (relating to the middle and late Neolithic): 4720-4600 BC cal 1 σ ; 3630-3380 BC cal.1 σ.