NAT 2022

With Brad Grothen, Doug Harding, Evan Brinkerhoff

Date: June 19, 2022

Event Name: North American Tunneling Conference (NAT)
Dates: June 19-22, 2022
Location: Philadelphia, Pennsylvania
Booth: 205

Come join us in Philadelphia, Pennsylvania, USA June 19-22 at the North American Tunneling Conference, the premier tunneling event focusing on current projects, challenges, and successes in tunneling. Our team of experts will have brochures, technical papers, spec sheets, and the latest updates on our machines. Visit our booth 205 to learn more about our ongoing and successful tunneling projects, and be sure to check out our insightful technical presentations.

Technical Presentations

Monday June 20
TBM Technology Session
Salon G

2:00 – 2:25 PM
Unprecedented In-Tunnel Diameter Conversion of the Largest Hard Rock TBM in the U.S.
Presented by Evan Brinkerhoff, Robbins Field Service Site Manager

2:50 – 3:15 PM
Hard Rock Tunnel Boring in Challenging Conditions at the Jefferson Barracks Tunnel
Presented by Doug Harding, Robbins Sr. Vice President

3:15 – 3:40 PM
The Next Generation of Mixed Ground Tunnel Boring Machines
Presented by Brad Grothen P.E., Robbins Technical Director


Brad Grothen

Vice President-Engineering

Doug Harding

Sr. Vice President

Evan Brinkerhoff

Field Service Site Manager