Mary's Milestones Delivering the HRBT twin bored tunnels

Mary, The Tunnel Boring Machine arrived with fanfare, performed flawlessly, and is preparing to head home to Germany. Mary's successful mission is a 2025 crowning achievement for the HRBT Expansion Project. In today's installment of HRBT Tunnel Talk, project personnel revisit her milestones in delivering twin bored tunnels for the Virginia Department of Transportation.