The tunnel ground-breaking ceremony for the structural retrofitting of the Michaelstunnel took place on 02.08.2011. Ms Senta Luise Gerstner, wife of the mayor, agreed to act as patron.
On 04.07.2011 the tunnel ground-breaking ceremony took place under the patronage of Ms Margit Fischer, the wife of the Austrian federal president. During the first six building months the advance work took place via the existing ventilation shaft. In the meantime, the 60 m deep building shaft has been completed and as a result the foundation laid for the installation of four tunnel drives – two tubes each in the directions of Graz and Klagenfurt.
On 24.05.2011 the roof breakthrough of the northern section occurred. The overall advance length of the northern section was 2,924 m. Of this 1,909 m was covered from the intermediate access tunnel and 1,015 m from the north portal. The entire stretch was completed in less than 11 months.
The underground construction department made a site visit in Visp, Switzerland on 4 and 5 April, 2011. The associates from headquarters in Schruns had an opportunity to get an idea of the scale of the Eyholz tunnel project on site. The remarkable performance of people and machines were discussed in detail and further operations planned at the underground construction conference on the second day.
The breakthrough ceremony for the Saukopf rescue gallery took place on 18.03.2011 in Weinheim. The construction of the 2.7 km escape gallery began in October 2009 and is to be ready for operation in mid-2012.
The start of driving work on contract 2 of the Koralm tunnel took place on 14 February 2011. A total construction time of eight years is estimated for the shell construction activities that began on 10 January 2011. There is a total tunnel length of over 40 km to be driven.
Both tunnel boring machines are expected to begin driving at the end of 2012.