A Colossal Bore Barbco Builds Biggest-ever Boring Machine For Monster Dig

摘要

For a portion of the work for the Gwinnet County (Ga.) Water Treatment Plant, subcontractor Strack Inc. needed to bore an 84-in. OD, 130-ft long drive beneath the Norfolk Southern Railroad in Sugar Hill, Ga.The 15-ft deep drive through red clay and the occasional railroad tie presented an intriguing set of challenges for the team.