The only way to keep the mine going would have been to spend perhaps £4 million on deeper tunnels plus new surface equipment.
The next day the gladers head out into the open through a deep dark tunnel.
Gleaming, almost beautiful light shone in his deep dark tunnel of terror.
With those deep tunnels, they could go straight out of the city, come up around Croton, and be on their way.
The need for economy had closed the deep tunnels completely in the early 1990s.
This system requires a deep tunnel that's built in a firm rock.
The unemployed live in deep tunnels and never see daylight.
There was no emotion in the deep silent tunnels of magic, but once back to myself I felt a sharp fear.
It's just like going through a deep tunnel, or sometimes when an elevator descends quickly from a great height.