1. Graduate Research Assistant, Geological Engineering, Univ. of Wisconsin–Madison, Madison, WI 53706 (corresponding author).
2. Wisconsin Distinguished Professor and Chair, Geological Engineering, Univ. of Wisconsin–Madison, Madison, WI 53706.
3. Professor, Dept. of Civil and Environmental Engineering, North Carolina State Univ., Raleigh, NC 27695.
4. Professor and Chairman, Geological Engineering, Univ. of Wisconsin–Madison, Madison, WI 53706.
5. Engineer, Office of Research and Development, National Risk Management Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH 45268.