Metro Vancouver | Maple Ridge Forcemain Scour Protection
On October 11, 2022, a project permit was issued to Metro Vancouver to install scour install new scour protection in the Fraser River located approximately 400 metres downstream of Barnston Island. The project is on federal lands and water managed by the Vancouver Fraser Port Authority
The project was approved subject to 41 permit conditions Metro Vancouver must meet to ensure the project does not result in significant adverse environmental effects.
About the 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 proposed project is anticipated to start between November 2022 and January 2023.
To learn more about Metro Vancouver’s project and construction activities, please contact us by email or phone at 604.665.9047.
Please note, when receiving public feedback as part of the PER process, the port authority may collect your personal information, i.e., your name, contact information and personal views and opinions, to inform the PER process for a proposed project. Your personal information may be disclosed to third parties, such as our tenants, in order for them to respond directly to you or help inform our response. You are entitled to submit a complaint to the Privacy Commissioner office here.