Orange County Public Works Department, SARI Mainline Tunnel Monitoring

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GUIDA provided surveying services as a subconsultant to the Vadnais Corporation for tunneling of the Santa Ana Regional Interceptor (SARI) Brine line. This major pipeline project included recovery and verifying control for 5 shafts and 7 drives, transferring control to bottom of shaft and monitoring of the 7 drives, and monitoring for 70 days of line and grade variations of each drive. GUIDA provided a report and as-builts of the operation.

As-Built Survey

Tunnel & Pipeline Survey

Control Survey