1. Members, ASCE
2. Asst. Prof., Dept. of Civ. and Envir. Engrg., Louisiana State Univ., Baton Rouge, LA 70803-6405 (corresponding author). E-mail: moemwil@lsu.esu
3. Prof., Dept. of Civ. Engrg. and Geological Sci., Univ. of Notre Dame, Notre Dame, IN 46556.