Guidance

HS2 Guide to Tunnelling Costs

This guide sets out the principal cost elements for bored tunnels constructed using either an ‘Earth Pressure Balance Machine’ (EPBM) or a ‘Slurry’ machine

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On the 26 March 2015 the House of Commons Select Committee for the High Speed Rail (London to West Midlands) hybrid Bill published their first Special Report.

View the Select Committee Special Report

This report states “The merits of tunnels should be assessed on the basis of their own cost and potential benefit, not their percentage contribution to overall project costs. We have requested that the Promoter make available a guide to tunnel costs to assist petitioners arguing the case for more tunnelling.”

As such, the “HS2 Guide to Tunnelling Costs” provides a description of the principal cost elements for bored (or mechanised) tunnels constructed using either an ‘Earth Pressure Balance Machine’ (EPBM) or a ‘Slurry’ machine.