Public notice 

Metro Vancouver Maple Ridge Forcemain Scour Protection – Public comments invited 

July 26, 2022 – As part of its Project and Environmental Review process, the Vancouver Fraser Port Authority must determine whether the proposed Metro Vancouver Maple Ridge Forcemain Scour Protection, located within the Fraser River approximately 400 metres downstream of Barnston Island, Surrey, B.C., is likely to cause significant adverse environmental effects. Written comments to be received by August 24, 2022

To help inform this determination and a decision on whether or not to approve the proposed project, the Vancouver Fraser Port Authority is inviting comments from the public respecting that determination. All comments received will be considered public and may be posted online.  For more information, individuals should consult the Privacy Notice on the Registry website. In addition, your contact information may be shared with third parties, e.g., the tenant, other relevant agencies, to help respond to your questions and inform possible mitigations. 

Written comments must be submitted by August 24, 2022 to: 

Vancouver Fraser Port Authority 
Project and Environmental Review 
100 The Pointe, 999 Canada Place 
Vancouver, B.C. Canada V6C 3T4 

The proposed project 

Metro Vancouver proposes to install new scour protection in an emerging scour hole in the Fraser River to protect its forcemain from continued scour. The proposed works include the extension of an existing blended rock apron located approximately 400 metres downstream of Barnston Island. The rock apron will extend approximately 26 metres upstream and downstream (52 metres in total) from the alignment of the pipe and 35 metres south towards the shoreline. The proposed blended rock apron will be 2 metres thick, with 4H:1V slope edges. Excavation of approximately 2,470 cubic metres is required to have the apron embedded into the existing riverbed. 

The total surface area of the apron will be approximately 7,120 square metres requiring 9,930 cubic metres of blended rock. Construction of the apron will include placement of the blended rock using an excavator equipped with a clamshell bucket working from a barge. The work will require two days for mobilization, one day for de-mobilization, and 20 days for in-water works. The project is anticipated to start between November 2022 and January 2023. 

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