1. Professor, Dept. of Civil and Environmental Engineering, Brigham Young Univ., Provo, UT 84602.
2. Staff Engineer, Tanner, Smith, Barfuss and Associates, 233 N 1250 W #201, Centerville, UT 84014.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Brigham Young Univ., Provo, UT 84602.