1. Project Manager, Manatt’s, Inc., 6333 NW Beaver Dr., Johnston, IA 50131.
2. Assistant Professor, Dept. of Civil Engineering, Cal Poly Pomona, Pomona, CA 91768.
3. Professor, Dept. of Civil and Environmental Engineering, Northeastern Univ., Boston, MA 02115.
4. Assistant Professor, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., Ames, IA 50014 (corresponding author).
5. Professor, Dept. of Civil, Construction, and Environmental Engineering, Iowa State Univ., Ames, IA 50014.