An artificial underground channel. Use specific type where known.
Related Terms
Term |
Note |
ADIT |
A horizontal tunnel opening from the surface used for haulage, access to a mine, exploration or drainage. |
RAILWAY TUNNEL |
A tunnel running under a river or a hillside through which a railway line runs. |
ROAD TUNNEL |
A tunnel carrying a road under a river or through a hill or other obstruction. |
SHAFT |
A vertical passage which provides access or ventilation to an underground excavation or chamber. Use only if function is unknown, otherwise use specific term. |