News & Infos Schematic overview Koralmtunnel
Twin tube and investigation tunnel (completed 2003-2010) Representation of driving method (NATM vs. TBM) for the main heading 2008-2020
News & Infos Construction lot KAT1
The 2500m long construction lot KAT1 includes a 300m cut and cover section. The open stretch on the Styrian side is about 3200m long.
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Length: 32,9km
Construction costs: 1,2 Bln €
Construction period: 2008-2020
Site supervision

The railway line Koralmbahn connecting Graz to Klagenfurt (approx. 130km) is a part of the Austrian high speed railway net and contemporary a section of the European Railway net. Core of the Koralmbahn is the 32,9km long twin tube Koralmtunnel. Between 2003 and 2010 previous works as 10km of investigation tunnel and 2 shafts (60m resp. 120m) have been completed. The project is devided in 3 lots named KAT1, KAT2 and KAT3. IGT has been awarded contracts for site supervision of KAT1 and KAT2 as well as extern reviews of KAT2 und KAT3.

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