Shriners Children’s Hospital is located near the campus of Oregon Health Sciences University in Portland’s West Hills. GRI was part of the design team for the expansion, which included partial renovation of the existing hospital and construction of three levels of offices and patient care areas that span an existing parking structure. GRI reviewed existing geotechnical information developed in 1993 for the original hospital and further explored subsurface conditions with drilled borings and seismic refraction lines to evaluate the depth to hard rock to assist with foundation design. The geotechnical investigation also included a site-specific seismic hazard study. GRI personnel provided on-site observation services and consultation during earthwork and construction of the foundation system, which included pin piles with rock anchors.