1. Engineering Intern, ARW Engineers, Ogden, UT; formerly, Graduate Student, Dept. of Civil and Environmental Engineering, Utah State Univ., 4110 Old Main Hill, Logan, UT 84332-4110.
2. Engineering Intern, Michael Baker Jr. Inc., 6955 S. Union Park Center, Suite 370, Midvale, UT, 84047-6516; formerly, Graduate Student, Utah State Univ., Logan, UT 84332-4110.
3. Professor, Dept. of Civil and Environmental Engineering, Utah State Univ., 4110 Old Main Hill, Logan, UT 84332-4110 (corresponding author).
4. Associate Professor, Dept. of Civil and Environmental Engineering, Utah State Univ., 4110 Old Main Hill, Logan, UT 84332-4110.