1. Assistant Professor, Dept. of Civil Engineering, California State Univ., 5151 State University Dr., Los Angeles, CA 90032 (corresponding author).
2. Graduate Student, Dept. of Biological and Ecological Engineering (Water Resources), Oregon State Univ., Corvallis, OR 97331; formerly, Undergraduate Student, Dept. of Civil and Construction Engineering.
3. Graduate Student, Dept. of Public Health, Oregon State Univ., Corvallis, OR 97331.
4. TM Rippey Consulting Engineers; formerly, Undergraduate Student, Dept. of Civil and Construction Engineering, Oregon State Univ., 7650 SW Beveland St. #100, Portland, OR 97223.
5. Associate Professor, Dept. of Anthropology, Oregon State Univ., Corvallis, OR 97331.