Front of Plant February 2022

At the Front of Plant site, SVCW’s contractor partner, Shea Parsons Joint Venture (SPJV), has completed work on the manifold connections, as well as installation of knife gate valves on the branched piping of the manifold, between the Receiving Lift Station (RLS) and Surge and Flow Splitter (SFS) shafts. This month, SPJV is preparing for the installation of six submersible pumps inside the RLS shaft. These are the pumps that will be pumping raw wastewater entering the shaft from the newly constructed gravity tunnel, to the Headworks facility for preliminary treatment. Once the RLS pumps are in place, piping connections will be made on the suction and discharge sides of the pumps. Simultaneously, SPJV is continuing with additional electrical work within the RLS shaft, which includes the installation of electrical conduits and cable tray.

RLS shaft work

Construction of the second pass walls continues within the SFS shaft interior walls. These walls are intended to serve as the finished wall surface inside the SFS shaft. SPJV has completed the installation of the scaffolding required to set steel rebar cages for the walls. These rebar cages are curved to align with the curvature of the SFS shaft wall. With the rebar cages in place, SPJV will set steel formwork for the second pass walls in advance of the concrete placement. These forms serve as temporary molds that hold the placed concrete in shape until it hardens and achieves sufficient strength. The forms will be removed once the concrete is strong enough to support its weight and the weight of any loads that imposed on it.This sequence is performed four times to achieve the total height of the shaft.

Steel rebar cages for SFS shaft second-pass walls
Front of Plant Progress
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