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The Tunnel Challenge
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Under Water

Under River
Digging a tunnel underneath a body of water is tough going! The ground here is a gooey, soppy mess! Choose a tool or technique below, and try to figure out the best way to dig a tunnel through the soggy ground without having the walls collapse on top of you!

Hint: The tunnel score will help you compare the different methods. A score of 100 is the best solution for this location.


fire-setting Hand Tools Gunpowder
Fire-Setting Hand Tools Explosives
Compressed Air Drill Tunnel Boring Machine Tunnel Shield
Compressed
Air Drill
Tunnel Boring Machine Tunnel
Shield

Choose a location


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