1. Postdoctoral Fellow, Dept. of Civil and Environmental Engineering (1372), Colorado State Univ., Fort Collins, CO 80523 (corresponding author).
2. Professor, Dept. of Civil and Environmental Engineering (1372), Colorado State Univ., Fort Collins, CO 80523.
3. Director, Integrated Decision Support Group; and Professor, Dept. of Civil and Environmental Engineering (1372), Colorado State Univ., Fort Collins, CO 80523.