Swiss Federal Railways (SBB) selected Implenia for the main construction work on the Bözberg tunnel, as part of the Gotthard route. This is the largest sub-project within this plan is the replacement of the existing Bözberg tunnel in Canton Aargau with a new twin-track tunnel. The values of the contract is CHF 145 million (EUR 139 million). Construction is scheduled to start in spring 2016, and the tunnel is due to become operational in 2020. As well as building the new track, the contract includes installation of some of the electrical equipment (rail technology). It also includes the conversion of the existing twin-track tunnel, which is not big enough for 4 metre containers, into a service and rescue tunnel, as well as all of the implementation planning.
The northern portal of the new tunnel is located near Effingen, while the southern one is by Schinznach-Dorf. Installation sites are being set up at both locations. The main drilling work will be done by a tunnel boring machine (TBM) starting at the Schinznach-Dorf site. A loading station will be set up on the Schinznach-Brugg-Wildegg transport route to take away the spoil. This will save a total of 56,700 lorry journeys along the roads from and to Wildegg.
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