Gravity Pipeline May 2021

Salus is in its last stretch of tunneling!
Barnard-Bessac Joint Venture (BBJV) has consistently monitored and maintained the tunneling equipment and parameters to ensure this drive went smoothly. With the constant check-ins and monitoring, Salus is on schedule and on target for break-in at the surge-flow splitter (SFS) shaft.
Crews continue preparing the SFS shaft and surrounding ground for Salus’ break-in. To ensure that Salus has a safe and successful break-in, BBJV will use a Roadheader (excavator-like machine) to demolish part of the SFS internal wall to a diameter slightly larger than Salus.
Around the shaft, ground improvements are complete with all jet grout columns installed, which reduce and prevent groundwater from entering the shaft during break-in. BBJV is performing strength and permeability testing ahead of break-in as part of their quality control, ensuring they meet the required parameters.
For more information about the Gravity Pipeline, go here.
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