1. Professor, Dept. of Civil and Environmental Engineering, Virginia Tech, 750 Drillfield Dr., Blacksburg, VA 24061.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, US Air Force Academy, 2354 Fairchild Dr., US Air Force Academy, CO 80840.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Lafayette College, 740 High St., Easton, PA 18042 (corresponding author).
4. Director of Business Development, Geopier Foundation Company, 130 Harbour Place Dr., Suite 280, Davidson, NC 28036.
5. Collin Group Ltd., 445 Arlington Rd., Bethesda, MD 20814.