Figure 3.
The diagram depicts a cross-section of an underground research facility beneath the ground surface. It illustrates the first shaft, 1980 to 1982, connected to the first gallery, 1983 to 1984, and an experimental shaft and gallery, 1984. A test drift, 1987, extends horizontally and connects to the second shaft, 1997 to 1999, through a connecting gallery, 2001 to 2002. The P R A C L A Y gallery, 2007, branches downward from the connecting gallery. An ATLAS heater borehole, 1992, is shown along the test drift, with the MEGAS E 5 location marked nearby. Surface infrastructure is shown above the subsurface layout.Location of the MEGAS E5 piezometer borehole entrances in the HADES URL