1. Grad. Student, Dept. of Civ. and Envir. Engrg., Washington State Univ., Pullman, WA 99164-2910.
2. Prof., Dept. of Civ. and Envir. Engrg., Washington State Univ., Pullman, WA 99164-2910.
3. Asst. Prof., Dept. of Civ. and Envir. Engrg., Washington State Univ., Pullman, WA 99164-2910.
4. Assoc. Prof., Dept. of Civ. and Envir. Engrg., Washington State Univ., Pullman, WA 99164-2910.