1. Golder Associates Inc., 2121 Abbott Road, Suite 100, Anchorage, Alaska 99507 U.S.A., john_thornley@golder.com
2. Also at Department of Civil and Environmental Engineering, University of Strathclyde, James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, United Kingdom.
3. College of Engineering, University of Alaska Anchorage, 3211 Providence Drive, EIB, Anchorage, Alaska 99508 U.S.A.
4. Golder Associates Inc., 18300 NE Union Hill Road, #200, Redmond, Washington 98052 U.S.A.