1. University Fellow, Dept. of Civil & Environmental Engineering, Univ. of Wisconsin–Platteville, Platteville, WI 53818; formerly, Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Colorado State Univ., Fort Collins, CO 80523.
2. Professor, Dept. of Civil and Environmental Engineering, Colorado State Univ., Fort Collins, CO 80523 (corresponding author).
3. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Colorado State Univ., Fort Collins, CO 80523.