1. Associate Professor, Dept. of Civil and Environmental Engineering, Lamar Univ., Beaumont, TX 77710 (corresponding author).
2. Graduate Engineer, Freese and Nichols, Inc., 10497 Town and County Way, Suite 600, Houston, TX 77024.
3. Professional Engineer, Lower Neches Valley Authority, 7850 Eastex Fwy, Beaumont, TX 77708.