access tunnel - light show

access adit and area asphalt blast bore boring ceremony chunking civil concept concrete construction contrast cross cutter dark design drainage drill drink drinking drive engineer engineering excavation flashlight fresh future futuristic gallery gunite head heading headlight horizontal inaugural installation invert large light lining machine men method municipal opening person pipeline plan planning potable profile quality railway road segment set sewer shaft shotcrete show site structural supervision supply surface system tbm tube tunnel tunnelling underground walking waste water work