Project Description
Tritech was the design-builder responsible for the design, construction, and commissioning of this Project.
Completed
2021
Owner
City of Chilliwack
Scope
Tritech’s scope of work for this project included:
- Construction of a new Inlet Works Building to house the equipment required for fine screening, screenings washing/compacting, grit and septage separation and transfer pumping:
- Efficient and high-performance screening units with screenings processing
- A high-performance induced vortex grit removal system with grit processing
- Septage system
- Pump station supply and installation
- Construction of a pipeline to convey screened / de-gritted wastewater from the Inlet Works Facility to the existing primary clarifiers
- Associated geotechnical, civil, structural, architectural, mechanical, electrical & instrumentation
- Emergency Repair Works to Primary Clarifiers:
- During the upgrade works, a trough collapsed in Primary Tank #1 requiring an emergency repair (unrelated to Tritech’s work). The City retained Tritech to complete emergency repairs as follows:
- Phase 1 The Isolation Process:
- Prior to completing the proposed repair work, Tritech was required to obtain WCB approval for their method of isolating the discharge channel with an engineered bulkhead gate and sandbags. Phase 1 work included the following:
- Obtain WCB approval for the proposed isolation method
- Conduct sampling of the existing concrete to determine the extent of the concrete repairs
- Demolition of the existing trough
- Phase 2 The Concrete Repair:
- Phase 2 included the concrete repair, fabrication, and installation of the channels and troughs in primary tanks #1, #2 and #3. To complete the proposed repair work, Tritech executed the WCB approved method as submitted on Phase 1.
