Construction work within the Receiving Lift Station (RLS) at the Front of Plant site continues to progress. SVCW’s contractor partner, Shea Parsons Joint Venture (SPJV), completed preparing and coating the various pieces of the manifold piping within the RLS. Wastewater flow enters the channels at the bottom of the Surge and Flow Splitter (SFS) shaft, where the gravity tunnel pipeline discharges. Flow passes from the SFS into the RLS through a two-branch manifold which is connected to six pumps that will pump raw wastewater to the new Headworks Facility. SPJV will be working over the next two months to create the final connection between the SFS shaft and the RLS manifold. To do so, SPJV will be coring through a small section of the common concrete wall between the SFS and RLS shafts to connect the two 60-inch manifold piping to the SFS shaft.
SPJV installed the isolation valves for each of the RLS pumps. Each pump can be isolated from the overall system to allow for future maintenance. The RLS pumps have been manufactured and will undergo functional testing at the factory in Sweden in the Fall 2021, prior to arriving at the project site. This factory testing will be witnessed by SPJV representatives and representatives from the SVCW Program oversight team, in accordance with specified quality assurance requirements.
At the SFS shaft, the gravity pipeline (GP) project contractor, Barnard-Bessac Joint Venture (BBJV), finished removal of the Tunnel Boring Machine (TBM) and is working to install and secure the first segment of fiberglass reinforced pipe (FRP) that will carry wastewater from the tunnel in to the SFS shaft. When this pipe segment is placed and secured, SPJV will resume work in the SFS shaft, in preparation for connection to the RLS. A high level of coordination is required between the two JV contractor teams. Both teams have a coordination schedule in place and hold frequent coordination meetings to communicate work, schedules and potential safety considerations from their work operations. Coordination efforts are ongoing between the teams to ensure construction is not impacted between the FoP and GP projects.