LEP tunnel completed

8 February 1988

The excavation of the tunnel for the Large Electron-Positron Collider (LEP) – Europe’s largest civil-engineering project prior to the Channel Tunnel – is completed. The two ends of the 27-kilometre ring come together with just one centimetre of error. The LEP tunnel, built while plans for the LHC is underway, will later house the LHC. The picture above shows a tunneling crew after completing a section of the tunnel between points 2 and 3 on the LEP ring. 

Timeline: 
The Large Electron-Positron Collider
The Large Hadron Collider
The history of CERN

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