1. Associate Professor, Univ. of Iowa, IIHR-Hydroscience and Engineering, Dept. of Civil and Environmental Engineering, Iowa City, IA 52241. E-mail: apapanic@engineering.uiowa.edu
2. Research Associate Engineer, Univ. of Iowa, IIHR-Hydroscience and Engineering, Dept. of Civil and Environmental Engineering, Iowa City, IA 52241. E-mail: melhakee@engineering.uiowa.edu
3. ERM Inc., Exton, PA. E-mail: george.krallis@erm.com
4. ERM Inc., Exton, PA
5. Faculty Research Associate, Bryn Mawr College, Dept. of Geology. E-mail: jeedgr@aol.com