1. Project Engineer II, Mortenson Construction Company, Denver, CO 80202.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, 423 J.D. Tickle, Univ. of Tennessee, Knoxville, TN 37996 (corresponding author).
3. Professor, Dept. of Civil and Environmental Engineering, Pennsylvania State Univ., 201 Transportation Research Building, University Park, PA 16802.
4. Geotechnical Designer, Gannett Fleming, Inc., 207 Senate Ave., Camp Hill, PA 17043.