Tunnel · Austria

How much does Semmering Base Tunnel cost?

The Semmering Base Tunnel is a 27.3-kilometre twin-tube railway tunnel between Gloggnitz in Lower Austria and Mürzzuschlag in Styria, built by ÖBB since 25 April 2012 as part of the Southern Railway, with both tubes fully excavated by November 2024 and commissioning expected around 2030. The total cost was first put at about EUR 3.1 billion, raised to EUR 3.9 billion in April 2022 after a geological fault zone at Grassberg and to EUR 4.2 billion reported in June 2024, which ÖBB says should stay stable.

Published project estimate

€4.2 billion

Approximately $4.55 billion

Cost basis: 2024

Baustelle (Herbst 2019) beim Ostportal des Semmering-Basistunnels (SBT) am Rande der niederösterreichischen Stadt Gloggnitz. Der SBT wird in drei Baulosen errichtet, hat eine Gesamtlänge von 27,3 km und soll 2026 in Betrieb gehen. Das Portal und der Tunnelabschnitt Gloggnitz mit einer Länge von ca. 7,4 Km gehört zum Baulos 1.1., ist mit rd. 450 Mio. Euro budgetiert und wird von den Firmen Implenia Österreich, HOCHTIEF Infrastructure Austria und Thyssen Schachtbau errichtet.
C.Stadler/BwagCC BY-SA 4.0

Cost evidence

Basis of the published figure

Published project estimate2024
en.wikipedia.org

Project metrics

Key dimensions

Total lengthMeinBezirk.at
27.3 km

Project record

Timeline

  1. 25 April 2012

    Construction started

    meinbezirk.at

  2. 2030

    Current completion estimate

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