Tunneling machines

ZED Tunnel Guidance, located in London, U.K., specializes in development and manufacture of advanced guidance systems for Tunnel Boring Machines (TBMs).

On Dec. 7, 2009, a new milestone was reached for auger boring machines (ABMs) using disc cutterheads. Contractor Gonzales Boring & Tunneling bored a landmark crossing length of 600 feet using a 42-inch diameter small boring unit (SBU-A).

After 35 working days of excavation, Ohio contractor Turn Key Tunneling Inc. had reason to celebrate. Their trenchless crossing beneath Interstate Highway 265 in Louisville, KY, had just been completed at an unprecedented bore length of 352 feet.

After decades of debate and hard work, completion of the Animas La Plata main reservoir in Colorado was down to just two intake lines.

The Christiana Hospital and Helen Graham Cancer Center in Newark, DE, are located off Route 4. A local stream passes under the highway through a corrugated metal pipe (CMP) near the hospital.

Jeff Griffin, Senior Editor

Barbco has introduced the first "maxi" rig to its line of horizontal directional drilling equipment.

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