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.
Last Updated June 2021
TBM Status Update – June 14, 2021
As of June 14, 2021, Salus tunneled 12,208 feet from its launch shaft and built 2,437 rings. Tunnel production towards the Front of Plant (FoP) project site continues, as the date for TBM break-in to the receiving shaft approaches. The Surge/Flow-Splitter shaft (SFS) element of the FoP project is serving as the TBM retrieval shaft before being repurposed to be part of the FoP project.
BBJV will perform demolition of a portion of the SFS Shaft wall, limited to the specific section where Salus will be breaking through. This demolition will reduce the extent of the concrete wall that the TBM will need to mine through to break in. The demolition work follows a planned approach to ensure safety of the break-in operation.
Once partial wall demolition work is complete, BBJV will fill the SFS shaft with soil and water to allow Salus to mine into the SFS under safe conditions, like the mining conditions Salus has encountered over the 3.5 miles of mining completed so far.
As Salus enters the final stretch of mining, BBJV is keeping up with its daily tunnel task force and check in meetings where the real-time TBM and mining parameters are discussed in detail.
Monthly Update: May 2021
Gravity Pipeline Project
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