1. Assistant Professor, Dept. of Civil and Environmental Engineering, Colorado State Univ., Fort Collins, CO 80523 (corresponding author).
2. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401; formerly, Undergraduate Research Assistant, Civil and Environmental Engineering, Colorado State Univ., Fort Collins, CO 80523.
3. Dean, School of Engineering and Applied Science, Hamilton Professor, Civil and Environmental Engineering, Univ. of Virginia, Charlottesville, VA 22904; formerly, Wisconsin Distinguished Professor and Chair, Geological Engineering, Univ. of Wisconsin-Madison, Madison, WI 53706.