Tunnels and Shafts
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Description
Over the decades, we have built tunnels for sewers, water mains and transportation, including pedestrians, autos and rail, mechanical piping, hydro electric penstocks and even electrical power transmission. These tunnels have been built in solid rock, mixed ground conditions and soft soils.
Tunneling methods include the use of Tunnel Boring Machines (TBM), road headers, digging shields, rock drills and by hand. Ground support systems run the spectrum from rock bolts to fully gasketed liner plates. We are experienced with tunnels from 4' to 30' in diameter, and up to 200' below ground.
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Tunnels and Shafts
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