Colorado State University

Charles Shackelford, PhD, PE

Professor & Head

Charles D. Shackelford is Professor and Head of the Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, Colorado, USA. He has 28 years of experience pertaining to the geoenvironmental aspects of waste management and environmental remediation, is a registered professional Civil Engineer in California and Colorado, and has served as an expert on waste disposal issues on numerous occasions for private companies and federal agencies. Dr. Shackelford's research is focused primarily on evaluating flow and transport of hazardous liquids and contaminants through soil and geosynthetic containment barriers, such as compacted clay liners (CCLs) and geosynthetic clay liners (GCLs), commonly used in geoenvironmental containment applications (e.g., landfills, surface impoundments, lagoons, secondary containment of above-grade fuel storage tanks, etc.), as well as through soil-bentonite (SB) vertical cutoff walls used for in situ control and containment of polluted groundwater. His most significant contributions have related to characterizing diffusion of potential contaminants through these barrier materials. Dr. Shackelford has served as an Editor for both the ASCE Journal of Geotechnical and Geoenvironmental Engineering, and the Journal of Hazardous Materials published by Elsevier, Amsterdam, and currently serves as an Editorial Board Member of Geotextiles and Geomembranes, also published by Elsevier, and as an Associate Editor of the Canadian Geotechnical Journal published by the National Research Council, Ottawa, Ontario, Canada. He also was past chair of the Geoenvironmental Engineering Committee (GEC) of ASCE's Geo-Institute, and past co-chair for the Environmental Geotechnics Committee TC215 of the International Society of Soil Mechanics and Geotechnical Engineering (ISSMGE), and currently is still a member of both the GEC and TC 215. He also served as a member and the chair of ASCE Geo-Institute's Awards Committee, as a member of the Technical Coordination Council (TCC) of ASCE's Geo-Institute, and was an elected Board Member of the U. S. University Council on Geotechnical Education and Research (USUCGER). Dr. Shackelford was elected to the Academy of Civil Engineers at his alma mater, the Missouri University of Science and Technology, in April of 2005. Dr. Shackelford's career contributions to the field of Environmental Geotechnics have recently been recognized through his receipt of the inaugural (2013) R. Kerry Rowe Honorary Lecture for Environmental Geotechnics by the ISSMGE. Professor Shackelford was elected as a Fellow of the American Society of Civil Engineers in 2015. His MS and PhD degrees are from the University of Texas at Austin in 1983 and 1988, respectively.

Christopher Bareither, PhD, PE


Areas of Research:

  • Hydro-mechanical behavior of tailings and mine waste, energy waste, and solid waste

  • Internal and interface shear strength of geosynthetic clay liners

  • Laboratory and field testing of geomaterials

  • Engineering challenges in developing communities

Areas of Teaching:

  • Introduction to Geotechnical Engineering

  • Slope Stability, Seepage, and Earth Dams

  • Mining Geotechncis

  • Waste Behavior and Mechanics

Education & Prior Experience: PhD & MS, Geological Engineering, University of Wisconsin-Madison; BS, Geological Engineering, University of Idaho. Prior to joining CSU, Dr. Bareither was an Instructor and Research Associate at the University of Wisconsin-Madison.


Joseph Scalia, PhD

Assistant Professor

Areas of Research:

  • Geoenvironmental systems (water-balance covers, oleophilic bio-barriers, geosynthetic clay liners, enhanced bentonites),

  • Hydro-mechanical behavior of tailings and mine waste, energy waste, and expansive soils,

  • Unsaturated terramechanics

Areas of Teaching:

  • Introduction to Geotechnical Engineering (CIVE 355/356)

  • Environmental Containment Systems (CIVE 558)

  • Unsaturated Soil Mechanics (CIVE 559)

  • Remediation (CIVE 658)

  • Geo-Technical Oral Communications

Education & Prior Experience: PhD & MS, Geological Engineering, University of Wisconsin-Madison; BS, Civil & Environmental Engineering, Bucknell University. Prior to joining CSU, Dr. Scalia was a Senior Associate at Exponent Inc. in the Environmental and Earth Sciences Practice in Seattle and Boston.