Underground Civil Works

Arraiz Tunnel. Metropolitan Southern Bypass

Owner: Interbiak

Client: UTE Arraiz

Twin road tunnel in the Metropolitan Southern Bypass of Bilbao. Total length of 4,887 metres in several sections: 80 metres in 4-lane section, 1,500 metres in 3-lane section, 72 metres of connecting galleries with a cross-section of 33 m², 65 metres of technical rooms of 62 m², all of which was carried out by drilling and blasting.