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Monitoring opportunity on Slovenia border tunnel scheme

Slovenian roads authority Družba za avtoceste v Republiki Sloveniji is seeking a partner to undertake geological and geotechnical monitoring on the new eastern bore of the Karavanke motorway tunnel between Austria and Slovenia.

1200px tunnelanstich

1200px tunnelanstich

Source: Salzburger Nockerl

Work on the Austrian side of the tunnel started in September last year

According to documents published in the Official Journal of the European Union, geotechnical monitoring work for the new second bore is expected to last 41 months but no estimated value has been placed against the contract.

According to the roads authority, the new tunnel “represents an important further step towards the abolition of the bottleneck in the field of road transport between Slovenia and Austria”. The project will also improve the direct link between the two corridors of the TEN-T core network by linking the A2 Karavanke-Obrežje motorway in Slovenia with the A11 Villach-Karavanke motorway in Austria.

Work on the 7.9km long, 12m diamater tunnel, which will span the border with 3.5km of the tunnel extending below Slovenia, was started in September last year on the Austrian side by Turkey-based Cengiz Insaat. However, the Slovenian roads authority barred the contractor from undertaking its part of the tunnel and is expected to announce a new contractor soon.

The new tunnel is scheduled to open in 2024 to allow the existing bore to be refurbished by 2026.

The existing western bore of the tunnel was opened in 1991. The route was first conceived as a twin bore tunnel in the 1970s but lower than expected traffic predictions led to the single bore proceeding to construction in 1986.

Bids for the geotechnical monitoring work must be submitted by 28 January.

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