A road tunnel is being gradually bored through the Grand St. Bernard mountain in the?
LV Entrance to tunnel.
SV Working face.
SV Charge holes being drilled.
SCU PAN.. Drill operator.
SV Bit rotates in rock.
LV Drilling equipment being moved back from rock face.
SV Charges being prepared.
SV Charges placed in hole.
SV Firing line fed into hole.
SV Charge rammed home.
SV Another ditto.
SV Miners walk back through long tunnel.
SV Driver of mechanical shovel.
SV Mechanical shovel lifting rock after explosion
SCU PAN..Rock emptied on to start of conveyor.
SV Rock entering conveyor.
SV PAN.. Along conveyor belt.
LV PAN.. Along tunnel.
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Background: A road tunnel is being gradually bored through the Grand St. Bernard mountain in the Alps to permit easy access for traffic between Switzerland and Italy. On the Swiss side, at Valais, work continues day and night in the d'Entremont valley.
Despite valuable work done by modern machinery, manpower is the all important factor. As rock is cleared away along the conveyor belt charges are laid for the next blasting.
A fresh team takes over after the rock face has been well washed down to prevent dust contamination. Then with mechanical shovels and other equipment the rock is taken away. Progress is at the rate of approximately 5-7 yards a day.
Nearly one thousand men are employed on the Grand St. Bernard tunnel by the Italian contracting company SISTRAB. Work - estimated to be completed by 1962 - will shorten the traditional road routes from the Atlantic, the North Sea and the Baltic to the Mediterranean by hundred of miles. The tunnel will be 5,875 kilometres long.