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DRAGADOS was awarded its first Subway project in Spain in 1944. In 1965, the company began its international push and won its first contract for underground works. Since then, DRAGADOS has been awarded more than 550 underground projects in twenty countries on all five continents.

World map showing the countries where building projects have been carried out (North America, Chile, Argentina, Colombia, Australia, Portugal and Spain among others).

Today, having constructed more than 940 miles of tunnels, shafts, galleries and stations through all types of geological conditions utilizing state-of-the-art technology, construction methodologies and techniques, we are a worldwide leader in underground construction.

Examine the projects executed


Relevant Facts
Road tunnels: 149
Railway tunnels: 168
Subway tunnels: 185
Water tunnels: 356
Mine & service:  87
TOTAL miles 944

Most important projects per specialty

Front view of the tunnel boring machine used for the creation of the tunnel

Alaskan Way Viaduct replacement - Seattle, USA

Located in Seattle, Washington, the 1.7 mile tunnel was constructed using a 57 feet diameter TBM; one of the largest EPB boring machines in the world. A single bore, bi-level design accommodates two lanes of traffic per level; each level maintains
Front view of the tunnel boring machine used for the creation of the tunnel while it is being lowered into the tunnel

Crossrail C-305 - London, United Kingdom

Crossrail C305 was one of the largest contract in Europe at that time. Four Tunnel Boring Machines (TBMs) have been used to excavate through London Clay to construction of twin concrete lined tunnels The available waterways were critica...
Front view of the metro station, consisting of several levels

Ottawa LTR - Ottawa, Canada

The new Light Rail Transit (LRT) project consists of 1.6 miles of underground rail and three stations at Lyon West, Parliament East, and Rideau. This concession contract not only includes the design and construction of the project but also mainten
Recreation of the future train station, you can appreciate the glazed aspect that it will present

North West Rail Link Sídney - Sydney, Australia

This Design-Build contract in Sydney consisted of major rail and station works including the excavation of two 10 mile long tunnels, 20 ft in diameter, between the existing Epping Station and the new Bella Vista Station. Fifty-nine cross passages