1. Ph.D. Candidate, Dept. of Civil Engineering, Univ. of Texas at Arlington, P.O. Box 19308, NH 232, Arlington, TX 76019; formerly, Graduate Research Assistant, Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045.
2. Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045 (corresponding author).
3. Chief Geotechnical Engineer, Kansas Dept. of Transportation, 2300 Van Buren, Topeka, KS 66611-1195.
4. Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045.
5. Staff Geotechnical Engineer, Terracon, 13910 W. 96th Terrace, Lenexa, KS 66215; formerly, Ph.D. Student, Univ. of Kansas, 1530 W. 15th St., Lawrence, KS 66045.