Dr. Raymond W. Henn



Office phone: 303.534.5789 ext 3212

Email: rhenn@brierleyassociates.com


  • Colorado School of Mines, Ph.D., Mining and Earth Systems Engineering
  • University of Denver, Certificate of Advanced Studies in Alternative Dispute Resolution
  • University of Wisconsin, Professional Degree in Engineering (Civil)
  • State University of New York, M.S., Engineering/Construction Management
  • City University of New York, B.A., Geology
  • City University of New York, A.A.S., Construction Technology

Committee Activities

  • Session Chair for the Shaft and Tunnel Program at SME’s Annual Conference 2010
  • Past President of the American Underground Construction Association (AUA)
  • Conference Chair for North American Tunneling 2004 (NAT2004)
  • Member of the Organizing Committee for North American Tunneling (NAT 2008)
  • Chairman, AUA Committee on Backfilling and Contact Grouting of Tunnels & Shafts
  • Member of the UTRC Committee on Groundwater in Tunnels


  • Ultrafine Cement in Pressure Grouting, textbook published by the American Society of Civil Engineers, 2010.
  • AUA Guidelines for Backfilling and Contact grouting of Tunnels and Shafts, textbook published by the American Society of Civil Engineers, 2003.
  • Practical Guide to Grouting of Underground Structures, textbook published by American Society of Civil Engineers, 1996.
  • As well as numerous professional papers and materials

Professional Experience

Dr. Henn has more than 40 years of heavy and underground construction experience with a concentration in shafts and tunneling, hydroelectric, water and wastewater, and transportation projects. During his career, Dr. Henn has held positions from field engineer through superintendent to construction manager on both direct-hire construction, and construction management assignments. The projects have ranged in value from $2M to $1.2B. He has a strong background in general civil construction, mass and specialty concrete placement, deep foundations, shaft and tunnel excavation and lining, and marine construction. Dr. Henn's underground experience includes conventional drill and blast, tunnel boring machine, roadheader, and sequential excavation methods in hard rock, mixed-face, and soft-ground conditions. He has experience with deep shaft and large chamber excavations, as well as pressure tunnels. He has worked extensively with cast-in-place and precast concrete, shotcrete, and various types of pipe tunnel lining systems. His foundations background consists of mass excavations, geotechnical and structural grouting, sheet piling, construction dewatering, post tension anchors, rock bolting, soldier pile and lagging, structural slurry wall construction, drilled shafts, and soil nailing.

Honors and Awards

  • Recipient of the American Society of Civil Engineers 2002 Roebling Award for Advances and Innovations in Construction Engineering
  • Recipient of the Underground Construction Association of SME’s 2008 Outstanding Individual Award

Professional Memberships

  • Society of Mining Engineers
  • American Society of Civil Engineers
  • International Society of Explosive Engineers
  • Dispute Resolution Board Foundation
  • The Beavers
  • The Moles

Research Interests

  • Grouting associated with underground construction
  • Shaft Construction Methods
  • Controlling Groundwater Flow into Tunnels and Shafts

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Last Updated: 08/04/2017 08:23:15