T. Leslie Youd

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T. Leslie Youd is an American geotechnical engineer and earthquake engineer, and is one of the pre-eminent expert researchers on soil liquefaction and ground failure. He has gained an international reputation in this field. He currently lives in Orem, Utah.


T. Leslie Youd received his BES in civil engineering from Brigham Young University in 1964. He then attended Iowa State University where he received his PhD in civil engineering in 1967. He performed post doctoral study in soil mechanics and engineering seismology from 1975 to 1976 at Imperial College of Science and Technology in London.[1]


Youd's research has been primarily concerned with the phenomenon of soil liquefaction, and the associated lateral spreading which can occur. Youd has published over 140 research papers[2] Youd's best-known papers are on the prediction of the magnitude of lateral spreading.[3]

Awards and honors[edit]

Youd was elected to the National Academy of Engineering in 2005.[4]

Youd was made an honorary member of the American Society of Civil Engineers in 2006, an honor bestowed upon fewer than 0.2% of its membership.[5] He received the Distinguished Alumni Award in 2011 at Iowa State University.


Youd earned patent #4,840,230 for a system to retrievably install instruments into a borehole.[6] He spent a lot of time on the theory of plate tectonics with success in many different categories.


  1. ^ "T. Leslie Youd" (PDF). Brigham Young University. Retrieved 5 June 2007.
  2. ^ "T. Leslie Youd Publications". Brigham Young University Department of Civil and Environmental Engineering. 2003.
  3. ^ Youd, T. Leslie; Hansen, Corbett M.; Bartlett, Steven F. (December 2002). "Revised Multilinear Regression Equations for Prediction of Lateral Spread Displacement". Journal of Geotechnical and Geoenvironmental Engineering. 128 (12): 1007–1017. doi:10.1061/(ASCE)1090-0241(2002)128:12(1007).
  4. ^ "Les Youd Elected to National Academy of Engineering". BYU College of Engineering and Technology College News. February 2005. Archived from the original on 15 August 2007.
  5. ^ Buhrman, Joan (7 July 2006). "Nationally Recognized Local Engineer Named Honorary Member of Civil Engineering Society" (Press release). ASCE. Archived from the original on 30 October 2007.
  6. ^ "Retrievable wedging system for coupling downhole devices into cased bore holes". Google Patent Search. Retrieved 5 June 2007.