1. Professor Civil & Environmental Engineering Dept., Brigham Young Univ., 368 CB, Provo, UT 84602 (corresponding author). E-mail: rollinsk@byu.edu
2. Staff Engineer, GeoEngineers, Inc., 8410 154th Ave. NE, Redmond, WA 98052. E-mail: kolsen@geoengineers.com
3. Staff Engineer, U.S. Engineering Laboratories Inc, 814 Parkway Blvd., Broomall, PA 19008. E-mail: djenson@usel.com
4. Staff Engineer, IGES Inc., 4153 Commerce Dr., Salt Lake City, UT 84047. E-mail: briang@igesinc.com
5. Staff Engineer, Kleinfelder, Inc., 2315 S. Cobalt Point Way, Meridian, ID 83642. E-mail: rolsen@kleinfelder.com