Huguenot Tunnel

Twin 4km long road tunnels for the main Motorway between Cape Town and Johannesburg.

Year: 1984

Country: Republic of South Africa

Contract Value (US$): 300 Million

This project formed an important part of the RSA’s 1980 infrastructure plan to connect the Cape Province with Gauteng in the Northeast of the country, via the main national motorway N1. It passes through the Du Toitskloof mountains, with an overburden of up to 700m. The dual tunnels were constructed using Drill & Blast methods with complex portal sections in soft ground that required the use of vacuum lances to dewater.

Due to its complexity and being the longest road tunnel in the RSA, this project team made up from Hochtief AG and Concor Ltd. won the Contractor’s award in 1986.