1. Student Member, ASCE
2. Member, ASCE
3. Doctoral Student, Dept. of Chem. Engrg. and Appl. Chem., Columbia Univ., New York, NY 10027.
4. Doctoral Student, Dept. of Civ. Engrg. and Engrg. Mech., Columbia Univ., New York, NY.
5. Prof., Henry Krumb School of Mines, Columbia Univ., New York, NY.