Dragados S.A. was founded in 1941 and won its first underground project in Spain in 1944. In 1965, the company began its international push and won its first contract. Since then, Dragados S.A. has completed over 530 underground projects in nineteen countries and four continents.

Today, having constructed more than 1,388 km of tunnels, shafts and galleries and stations through a variety of geological conditions, utilizing diverse methodologies and all types of construction technologies, we are a worldwide leader in underground construction.

Road Tunnel:
Railway Tunnels:
Subway Tunnel:
Water Tunnels:
Mine Tunnels:

More important projects by specialty

Bank Station Capacity Upgrade - London, UK

  • New entrance, three ticket halls, six lifts, 10 platforms, two 94m travelators, 570m tunnel and platform for Northern Line
  • Winners of the Constructing Excellence Integration and Collaborative Working Award 2014.
  • Throu... View »

Crossrail C-305 Eastern Running Tunnels - London, UK

This is the largest of the Crossrail projects and part of the biggest construction project in Europe.

We are constructing twin, concrete lined tunnels using four Tunnel Boring Machines (TBMs) and mining mainly through London Clay. We hav... View »

Madrid Subway (1995-2013) - Madrid, Spain

From 1995 to 2011, Metro de Madrid has built over 165 miles of new track, including 168 new station. This work has required the use of 31 Tunnel Boring Machines (TB). This is the largest Subway expansion ever.

Of those 320 new kms, 76 ha... View »

Bypass Sur M-30 (South Tunnel) - Madrid, Spain

MADRID INNER RING “Calle 30” (SPAIN) The Madrid inner ring covers 42 sq km of the city center where over one million people reside.

To allow traffic in both directions, a twin tube design, each with three lanes to accomadate ... View »