1. Member, ASCE
2. Prof., Dept. of Civ. and Envir. Engr., Univ. of Wisconsin, Madison, WI 53706. E-mail: russell@engr.wisc.edu
3. Res. Intern, Dept. of Civ. and Envir. Engr., Univ. of Wisconsin, Madison, WI. E-mail: stouffer@facstaff.wisc.edu
4. Mgmt. Consultant, 3006 Towne Commons Dr, Valparaiso, IN 46385. E-mail: stuwalesh@aol.com