Heysen Tunnels

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The Heysen Tunnels are twin tube road tunnels which carry the Adelaide-Crafers Highway under Eagle On The Hill in the Mount Lofty Ranges in South Australia. The tunnels were excavated using a tunnelling machine normally used in heavy-duty mining operations which tunnelled through 500 metres of rock for each tunnel at an average rate of 3 metres per day.^[1] Each tunnel carries 3 lanes of traffic.

The tunnels are named after artist Sir Hans Heysen.

[edit] References

1. ^ Heysen Tunnels Construction. Government of South Australia, Department for Transport, Energy and Infrastructure (13 August 2004). Retrieved on 2007-07-14.

Coordinates: 34°58′27″S 138°40′34″E / -34.974089, 138.676072