1. State Geotechnical Engineer, State Materials Laboratory, Washington State Dept. of Transportation, P.O. Box 47365, Olympia, WA 98504-736.
2. Professor and Research Director, Dept. of Civil Engineering, GeoEngineering Center at Queen’s-RMC, Royal Military College of Canada, Kingston, ON, Canada K7K 7B4 (corresponding author).
3. Postdoctoral Research Fellow, Dept. of Civil Engineering, GeoEngineering Center at Queen’s-RMC, Royal Military College of Canada, Kingston, ON, Canada K7K 7B4.