1. School of Civil and Construction Engineering, Oregon State University, 101 Kearney Hall, Corvallis, OR 97331.
2. Department of Civil and Environmental Engineering, Washington State University, 405 Spokane Street, Sloan 101, P.O. Box 64291, Pullman, WA 99164.
3. Department of Civil Engineering, University of Idaho, P.O. Box 44091, Moscow, ID 83844.