The entrance to the main tunnel for the £140m Glendoe hydro power scheme near Fort Augustus.
Part of the tunnel which had to be drilled and blasted to get the tunnel boring machine into the hillside.
A huge conveyor belt takes the rumble out of the cavernous tunnel.
A section of the tunnel boring machine, dubbed Eliza Jane by local schoolchildren.
A worker walks inside the 220-metre tunnel boring machine.
One of two large grippers that brace the Eliza Jane against the tunnel wall.
Lights lead the way from the outside down to the Eliza Jane.
A view towards Loch Ness from Glendoe construction site.
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