Mountain Tunnel

Mountain Tunnel

This project improved Adit 5/6 and Adit 8/9 access roads by grading and resurfacing the road with crushed rock. It enlarged Adit 5/6 and Adit 8/9 openings by replacing 3-foot diameter bulkheads with new 8-foot by 8-foot bulkhead doors. Enlarging the clearances and widening the Adits allowed vehicle access into the tunnel. The project included the installation of new pressure and turbidity instrumentation at two locations and installation of new pressure instrumentation at three locations. This project was completed under the Tunnel Safety Orders as referenced in Cal/OSHA Title 8 Regulations.

Project Details

Location

San Francisco, CA

Amount

$4.9M

Delivery Method

DBB

Client Name

San Francisco Public Utilities Commission (SFPUC)

Duration

2016 – 2017

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