1. Graduate Student, Dept. of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401 (corresponding author).
2. Associate Professor, Dept. of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401.
3. President and CEO, KL&A, 1717 Washington Ave., Golden, CO 80401.
4. Structural Engineer, Michael Baker International, Lakewood, CO 80228.