BAI worked with OPAC Engineers and the County of Sonoma, Department of Transportation to investigate the foundation conditions for a replacement bridge in the heart of Dry Creek Valley, Sonoma County.  BAI overcame site access challenges to drill deep test borings at each abutment and one boring in the creek channel (see drill rig in photograph).  BAI deftly navigated regulations regarding drilling within the river channel at the appropriate times so as to protect the resources from disturbance during the investigation.