At one time it had been mined for precious metal, and great tunnels were driven through the heart of the stone mountains.

A spacious tunnel was driven into the fellside to the appropriate spot and the work began.

When opencast work was no longer feasible, tunnels were driven to follow the veins.

Similar tunnels, known as drifts, are driven along the ore veins from the crosscut.

In addition, a tunnel was driven under King Street.

The tunnel was driven southwest at a gradient of 1:1000.

A second tunnel is being driven that will meet the floor level of the completed room.

The tunnel is being driven downward further, partly out of curiosity as to temperature conditions.

The new tunnel has been driven far enough, and rooms will be cut.

Nobody thought it possible that the tunnel could be driven from both sides and meet in the middle after years of work.