1. Graduate Researcher, CH2M Hill, 304 Laurel St., Ste. 2A, Baton Rouge, LA 70801. E-mail: Derek.Evans@CH2M.com
2. Formosa Plastics Endowed Professor, Dept. of Civil and Environmental Engineering, Louisiana State Univ., 102 ELAB, Baton Rouge, LA 70803 (corresponding author). E-mail: krusch@lsu.edu