1. Research Assistant, Dept. of Civil Engineering, Auburn Univ., Auburn, AL 36849-5337.
2. Professor, Dept. of Civil Engineering, Auburn Univ., Auburn, AL 36849-5337 (corresponding author).
3. Postdoctoral Research Associate, Dept. of Landscape Architecture and Urban Planning, Texas A&M Univ., College Station, TX 77843-3735.
4. Associate Professor, Dept. of Landscape Architecture and Urban Planning, Texas A&M Univ., College Station, TX 77843-3735.
5. Director of Engineering, R.O. Anderson Engineering, Inc., Minden, NV 89423.
6. Associate Professor, Dept. of Civil and Environmental Engineering, Texas Tech Univ., Lubbock, TX 79409-1023.