1. Professor, Dept. of Civil and Environmental Engineering, Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061.
2. Project Geotechnical Engineer, PanGeo, Inc., 3414 NE 55th St., Seattle, WA 98105.
3. Senior Principal and Director, Geo-Engineering Technology, URS Corporation, 8181 East Tufts Ave., Denver, CO 80237.