The construction of the tunnel was started in 2005 .
The construction of the tunnel was was halted in 2009 after one of the viaducts at the La Massana entrance collapsed and killed 5 Portuguese construction workers .
The construction of the tunnel was started in 2005 but was halted in 2009 after one of the viaducts at the La Massana entrance collapsed and killed 5 Portuguese construction workers .