Powered by a 162-hp air-cooled, turbocharged diesel engine, the CBM 48 cradle earth boring machine produces 170,000 ft.-lbs. of auger torque to install steel casings from 10 to 48 in. in diameter and ...

SEATTLE — The contractor trying to dig a new highway tunnel under downtown Seattle is ready for a key event in repairing the stalled boring machine known as Bertha, a state transportation official ...

Cross passages between both bores of London's 0.7-mile Silvertown tunnel are nearing completion in frozen ground, marking the end of excavations on the River Thames crossing. The $1.5-billion ...