TBM's (Tunnel Boring Machines) sometimes get bogged down in loose soils, mud or other unstable conditions. Green Mountain supplies products to be used with TBM's which solidify soils, giving the machine the strong mass it needs to perform its function.

Above: Mountain Grout pumped from a barge to seal 10,000 gallons per minute leak pouring into the cracked roof of a tunnel which was under construction beneath the James River in Virginia. Water was stopped, soil was solidified, and the TBM continued on.