With more than 50 years of innovation and experience, The Robbins Company is the world’s foremost developer and manufacturer of advanced, underground construction machinery, primarily TBM machines. Robbins has been involved in hundreds of tunnel boring projects around the world.
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Subsurface Constructors, Inc.
Full-service geotechnical contractors and ground improvement specialists. Based in St. Louis, MO. Visit Subsurface Constructors, Inc.
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Hatch Mott MacDonald
A full service engineering firm with much experience in tunneling. Visit Hatch Mott MacDonald
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Herrenknecht
Herrenknecht is a manufacturer of tunnel boring machines and other tunnel construction technology products. Visit Herrenknecht