Eiksund Tunnel

Although still under construction the Eiksund Tunnel in Norway is already the deepest underwater tunnel in the world at 942ft below sea level. At 4.8 miles long, the tunnel will service the areas of Heroy, Sande, Ulstein and Hareid. The reinforcement of this mammoth tunnel has already consumed around 172,000 square foot of concrete. More than 1,300 tonnes of explosives and a staggering 5 million blast holes were used to blast out the route. The tunnel was originally intended to be opened to the public in July of 2007, but numerous delays have pushed the date back into 2008.