Timeline: A look at what’s happened

October 2021

Pipe Installation at Tunnel Drive 2 (Gravity Pipeline project)

Tunnel Drive 2 was completed at the of end June 2021Salus was removed from the shaft, and installation of Fiber Reinforced Polymer (FRP) pipe for Tunnel Drive 2 begins.  

October 2021

July 2021

Start of Micro-tunneling Activity (Pump Stations Improvements project)

Micro-tunneling on the Pump Stations Improvements project begins. The tunneling work uses a Micro-Tunnel Boring Machine (MTBM) to construct the Belmont Gravity Pipeline, that will convey wastewater flows from the City of Belmont to the drop structure connection to the new gravity tunnel adjacent to the existing San Carlos Pump Station. This construction work is expected to take 22 months.  

July 2021

June 2021

Completion of Tunnel Drive 2 (Gravity Pipeline project)

Tunnel Drive 2 is completed at the of end June 2021, when Salus, the Tunnel Boring Machine (TBM), broke into the receiving shaft at the Front of Plant. Salus was removed from the shaft, cleaned, and hauled offsite for use in other tunneling projects not associated with SVCW’s project. This is the Gravity Pipeline project’s second major milestone. 

June 2021

June 2021

Major Mechanical and Electrical Equipment Installed (Front of Plant project)

Major mechanical and electrical equipment have been installed at the Front of Plant project site. This includes electrical equipment installed in the Headworks electrical room and major equipment, such as the Odor control system biofilters and granular activated carbon vessels.  Other equipment that was installed includes the grit washer classifier, Headcell grit removal unit, and odor control piping and fan units. 

June 2021

November 2020

Mobilization to Menlo Park Pump Station and San Carlos Pump Station (Pump Stations Improvements project)

Mobilization to Menlo Park Pump Station and San Carlos Pump Station sites for site preparation begins. This includes setting up of fences, trailers, and staging areas for construction. 

November 2020

November 2020

Installation of Interconnection Pipeline (Front of Plant project)

Installation of the Interconnection Pipeline (IPL) begins. The IPL is the 63-inch in diameter pipeline that conveys wastewater by gravity from the new Headworks Facility to the existing Wastewater treatment plant influent structure. 

November 2020

October 2020

Pipe installation at Tunnel Drive 1 (Gravity Pipeline project)

Tunnel Drive 1 was completed at the of end March 2021. Salus was removed from the shaft, and Fiber Reinforced Polymer (FRP) pipe sections were being transported from the pipe storage yard in Sunol to the project site in Redwood City for installation in the tunnel. Installation of the FRP pipe sections for Tunnel Drive 1 begins.  

October 2020

September 2020

Mobilization to Redwood City Pump Station (Pump Stations Improvements project)

Mobilization to Redwood City Pump Station for site preparation begins. This includes setting up of fences, trailers, and staging areas for construction. 

September 2020

March 2020

Completion of Tunnel Drive 1 (Gravity Pipeline project)

Tunnel Drive 1 is completed on end March 2020, when Salus, the Tunnel Boring Machine (TBM), broke into the receiving shaft at Inner Bair Island. Salus was removed from the shaft, inspected, and retooled for the Tunnel Drive 2. This is the Gravity Pipeline project’s first major milestone. 

March 2020

October 2019

Start of Tunneling Activity (Gravity Pipeline project)

Tunneling on the Gravity Pipeline project begins. There are 2 tunnel drives on this project, with Tunnel Drive heading from the launch shaft at the intersection of Shoreway Road and Holly Street, to a receiving shaft on Inner Bair Island and Tunnel Drive heading from the same launch shaft to a receiving shaft at the Front of the Plant project site adjacent to the SVCW WWTP 

October 2019

July 2019

Start of Excavation of Surge and Flow Splitter (SFS) Shaft and Receiving Lift Station (RLS) Shaft (Front of Plant project)

Excavation work on the SFS and RLS shafts begins. The SFS shaft is a vertical shaft located immediately to the west of (and upstream of) the Receiving Lift Station (RLS) shaft; the SFS shaft which will provide flow protection during wet weather events by acting as a surge towerWastewater will flow from the SFS shaft into the RLS shaft through two 60-inch diameter manifold pipes. The wastewater will be pumped out of the RLS through discharge pipes dedicated to each RLS pump and into the Headworks facility for preliminary treatment. The SFS shaft will be excavated to a depth of about 70 feet, while the RLS shaft will be excavated to a depth of about 90 feet.  

July 2019

October 2018

Pile Driving Work for Headworks Facility

Construction of the Headworks facility begins. Piles are driven into the soil to provide structural support for the construction of the Headworks facility. The Headworks Facility plays a crucial role in the pretreatment of the influent wastewater. It involves screening of inorganic fibrous materials, such as rags, wipes etc. and the removal of inorganic grit material, such as sand and silt, all of which can interfere or damage the treatment processes in the Wastewater Treatment Plant.  

October 2018

September, 2018

Shaft Work Begins

The Gravity Pipeline project tunnel launch shaft sitework begins northeast of the intersection of Shoreway Road and Redwood Shores Parkway/Holly Street intersection. Major construction for shafts also began in late September for the FoP project and is expected to take 12 months.

September, 2018

July, 2018

Breaking Ground

In July we broke ground for the Front of the Plant (FoP) facilities and gravity pipeline tunnel, culminating four years of planning and design to rehabilitate the agency’s aging infrastructure and facilities.

July, 2018

Nov 9, 2017

Approved Agreement with JF Shea-Parsons Joint Venture team

On November 9, 2017 the SVCW Commission approved a Design-Build agreement with JF Shea-Parsons Joint Venture team. (FoP)

Nov 9, 2017

Oct 11, 2017

Approved Agreement with Bernard-Bessac Joint Venture team

On October 11, 2017 the SVCW Commission approved a Design-Build agreement with the Bernard-Bessac Joint Venture team that includes Arup as the design engineer. (GP)

Oct 11, 2017

July 31, 2017

Heavy Construction Begins

The FoP project heavy construction will begin on Monday July 31 and last about three weeks. Additional bulldozers, earth movers, dump trucks, lime spreaders and mixers will arrive Monday morning and then the actual work will begin Monday afternoon or Tuesday morning (August 1).

July 31, 2017

April 13, 2017

Approval of RESCU Program

The Silicon Valley Clean Water (SVCW) Commission on Thursday, April 13, approved the Regional Environmental Sewer Conveyance Upgrade (RESCU) Program, which consists of replacing or rehabilitating nearly all components of the existing conveyance system, including pipelines and pump stations.

April 13, 2017

Jan 2017

Design- Build Procurement Process Approval

The Commission provided direction to proceed with this procurement method. PDB

Jan 2017

Dec 2016

Design- Build Procurement Process Recommendation

SVCW staff made a recommendation to the Commission in December 2016 to use a Design- Build procurement process for implementing the conveyance system design and construction.

Dec 2016

Oct 2016

Environmental Impact Report Preparation

SVCW is currently preparing an Environmental Impact Report for its Conveyance System Program and we anticipate the draft report will be available for public review in mid-to-late November. When it is available, we will post a notice on our website to inform anyone interested in how to access the report.

Oct 2016

2008

Capital Improvement Program Initiated

SVCW in 2008 initiated its Capital Improvement Program (CIP) to replace and rehabilitate the wastewater conveyance and treatment systems in a structured and prioritized manner.

2008

2006

Identification of Needs

Engineering studies determined that the majority of SVCW’s fixed assets were beyond their useful lives and needed replacement. The pipelines were experiencing more frequent leaks and the facilities, including pump stations, were deteriorating.

2006
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