Advisian developed the detailed design for a new infiltration gallery that increased Tervita’s capacity to wash caverns and increase storage of NGL at their facility.
Tervita is proposing to expand the capacity of their facility located near Lindbergh, Alberta. As part of that expansion, Tervita has an increased need for water and retained Advisian to develop an engineering design for an upgrade to their existing river water intake on the North Saskatchewan River.
Advisian developed the detailed engineering for a new infiltration gallery intake including the decommissioning and removal of the existing intake. In conjunction with the engineering design, Advisian has provided support to obtain regulatory approval for the project to proceed and is conducting on-going in-river water quality monitoring during construction.
When the construction of the gallery is complete, WorleyParsons has also provided engineered bank restoration drawings which will be implemented to repair construction impacts and restore the North Saskatchewan River bank to a pre-construction state.
Scope of work consisted of
• Building a sheet pile coffer dam, 54 m long x 27 m wide, on the North Saskatchewan River.
• To ensure no leakage enter the river body, all equipment working in the river used Bio oil.
• Decommissioning and removal of the existing infiltration gallery.
• Excavation 2m below river bed
• Installation of rock bed, johnson screens and an air scour system
• Collaboration with local First Nations for land use.
• Constant dewatering activities and monitoring turbidity levels
• Fish Salvage
• Bank restoration design
The project was completed during winter months to accommodate North Saskatchewan River RAP constraints and continuous water quality monitoring was completed to monitor potential impacts to aquatic species. The intake was put into successful operation in April.