Cornerstone Earth Group, Inc. performed advanced borings with a limited access drilling rig to evaluate the engineering properties of the underlying soil for a new multi-use bridge crossing over Arroyo de la Laguna at the Castlewood Country Club in Pleasanton, California. Cornerstone prepared a report outlining the geotechnical design criteria for new bridge foundations at the North and South abutments. The old bridge, seen in the top photo, was damaged by debris and flooding during this winter’s storm events.