1. Graduate Research Assistant, School of Civil and Construction Engineering, Oregon State Univ., 101 Kearney Hall, Corvallis, OR 97331 (corresponding author).
2. Associate Professor, School of Civil and Construction Engineering, Oregon State Univ., 101 Kearney Hall, Corvallis, OR 97331.
3. Geodesist, National Oceanic and Atmospheric Administration, National Geodetic Survey, 1315 East-West Highway, Silver Spring, MD 20910; formerly, Assistant Professor, School of Civil and Construction Engineering, Oregon State Univ., 101 Kearney Hall, Corvallis, OR 97331.
4. Geodesist, National Oceanic and Atmospheric Administration, National Geodetic Survey, 1315 East-West Highway, Silver Spring, MD 20910.