Project Name: HH-986 Mountain Tunnel Interim Repair
Owner: San Francisco Public Utilities Commission
Completion: March 2017
SMCI provided repairs to the Mountain Tunnel lining during the tunnel shutdown in early 2017. Work included collecting, pumping and treating all water in the tunnel from seepage. Additionally, we removed defective concrete lining from the tunnel and transported debris out of the tunnel. SMCI also assisted the City of San Francisco with the inspection of over 18 miles of tunnel including rock coring. We were responsible for all communications, rescue teams, transportation of the inspection team, ventilation, security, and all work involved in tunnel safety orders. Final cleaning of the rock traps and cleaning of tunnel was performed prior to returning to service.