1. Research Engineer, Dept. of Civil and Environmental Engineering, Michigan Technological Univ., Houghton, MI 49931 (corresponding author).
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Virginia, Charlottesville, VA 22904.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Michigan Technological Univ., Houghton, MI 49931.
4. Undergraduate Student, Dept. of Civil and Environmental Engineering, Michigan Technological Univ., Houghton, MI 49931.