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 May 2020
After Salus completed its first drive late-March, the Barnard-Bessac Joint Venture (BBJV) crew began disassembling the Tunnel Boring Machine (TBM) at the Inner Bair Island Shaft retrieval site.
Completed major section removal includes:
- Middle shield cover – during tunneling this shield acts as a protective structure for the workers. It also functions as a temporary support structure so concrete segment can be installed while Salus tunnels forward.
- Screw conveyor – assists in efficiently transporting excavated soil onto a conveyor belt that sends it out behind Salus
- Cutter head – the front segment of Salus responsible for cutting and excavating through the soil
Latest Updates
Gravity Pipeline Project
Gravity Pipeline May 2020
After Salus completed its first drive late-March, the Barnard-Bessac Joint Venture (BBJV) crew began disassembling the Tunnel Boring Machine (TBM)
Gravity Pipeline Update
Gravity Pipeline A bright note during an otherwise gloomy time, Salus, the Tunnel Boring Machine (TBM), completed her first tunnel
Tunnel Boring Machine Breaks Through at Inner Bair Island Shaft
Salus, the Tunnel Boring Machine (TBM), completed her first tunnel drive and broke through into the shaft at Inner Bair
Gravity Pipeline Update
Salus, the Tunnel Boring Machine (TBM), arrived at its first destination at the shaft located on the northern end of