What is the Gravity Pipeline Project?
The Gravity Pipeline (GP) Project consists of the design, construction, permitting, start-up, commissioning, and closeout of approximately 17,600 feet of wastewater gravity FRP pipe inside a concrete-segment tunnel. The work includs three shafts and will interface directly with the Front of Plant (FoP) Project at the Receiving Lift Station (RLS). Work is being implemented under a Progressive Design-Build procurement process.
What's Happening
Gravity Pipeline Project
Last Updated April 2021
TBM Status Update – April 5, 2021
Salus continues tunneling at a steady rate towards the SVCW wastewater treatment plant. As of Monday, April 19, 2021, Salus tunneled 10,267 feet from its launch shaft and built 2,048 rings.
Part of the preparations for Salus’ break in at the front of plant, BBJV is working on ground improvement around the break in shaft by installing jet grout columns. Jet grout columns are created by using high velocity fluid jets to mix cement and water with the soil in the ground. Ground improvement will allow BBJV to manage the groundwater surrounding the TBM receiving shaft when Salus breaks into the receiving shaft., making for a safe completion of the second tunneling drive.
Monthly Update: April 2021
Latest Updates
Gravity Pipeline Project
Gravity Pipeline December 2020
Gravity Pipeline Connection System SVCW’s contractor partner, Barnard-Bessac Joint Venture (BBJV), installed the excavation support system, or secant piles, for
Gravity Pipeline Update November 2020
Salus, the Tunnel Boring Machine (TBM), is already on its second drive of mining, making its way towards SVCW’s wastewater
Gravity Pipeline October 2020
Salus began continuous mining from the launch shaft towards the SVCW plant after a planned stoppage. During the final stop,
Tunnel Boring Machine Begins Second Drive
After a successful first tunnel drive, Salus, the Tunnel Boring Machine, is ready for her next journey – tackling twice
Quick Links
Contact
If you have questions about the Gravity Pipeline project.
- gravitypipeline@svcw.org
- 650-670-8954
Related Pages
Planning Reports
- Gravity Pipeline Project Planning Reports (Coming Soon)