Board Foundation, and the American Society for Engineering Education. She has served as a member of and liaison to many National Research Council boards and committees. Dr. Nelson has been a part of several major construction projects, including field engineering responsibilities during construction of the Trans-Alaska Pipeline System, and serving as a consultant to the U.S. Department of Energy and the State of Texas for the Superconducting Super Collider project. She was appointed a member of the Nuclear Waste Technical Review Board by President Clinton in 1997 and again in 2000. She has authored over 125 technical publications, and received many awards, including the Kenneth Andrew Roe Award, American Association of Engineering Societies in 2008 and the Henry L. Michel Award for Industry Advancement of Research, American Society of Civil Engineers, 2011. Dr. Nelson received her Ph.D. from Cornell University in geotechnical engineering.

Raymond L. Sterling is a Professor Emeritus at Louisiana Tech University. From 1995 to 2009 he was the Contractors’ Educational Trust Fund Professor of Civil Engineering and Director of the Trenchless Technology Center at Louisiana Tech University. Previously, from 1977 to 1995, he was the founding director of the Underground Space Center at the University of Minnesota. He is a Past Chairman of the International Society for Trenchless Technology and the North American Society for Trenchless Technology, a Past Chairman of the U.S. National Committee on Tunneling Technology, and a Past Animateur for the International Tunnelling Association’s Working Group on Direct and Indirect Advantages of Underground Structures. In 2003, he received the Stephen D. Bechtel Pipeline Engineering Award from the American Society of Civil Engineers. He was selected as the Person of the Year by the Trenchless Technology Magazine in 2001 and as Most Valuable Professional by the Gulf Coast Trenchless Association in 1999. In 2009, he received the Gold Medal from the International Society for Trenchless Technology for outstanding contributions to the field. He has authored approximately 200 books, technical papers and reports on a wide range of topics related to underground space use, underground construction, geomechanics and trenchless technology, and for the past 10 years has served as a Senior Editor of the international journal Tunnelling and Underground Space Technology. He is registered engineer in the United States and is a Fellow of the American Society of Civil Engineers. Dr. Sterling received a B.Eng degree in civil and structural engineering from the University of Sheffield. He received his M.S. and Ph.D. degrees from the University of Minnesota.

George J. Tamaro (NAE) is a retired partner at Mueser Rutledge Consulting Engineers. His technical interests are primarily in structural and geotechnical engineering. His work involves a broad range of analytical, design, and construction problems related to deep foundations and underground structures, and he is also involved in the design and construction of containment facilities and the control of dam seepage using special barrier systems. Mr. Tamaro holds several



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