1. Geotechnical Engineer, Engineering and Testing Services, Inc., 5226 Indian River Rd., Virginia Beach, VA 23464; formerly, Graduate Research Assistant, Univ. of Kansas, 1530 West 15th St., Lawrence, KS 66045.
2. Professor, Dept. of Civil, Environmental, & Architectural Engineering, Univ. of Kansas, 1530 West 15th St., Lawrence, KS 66045 (corresponding author).