The Old Norrish Intake Decommissioning Project involved the removal of an existing concrete weir and the construction of a new water intake structure for the City of Abbotsford. The project included complex in-stream works, river diversion activities, and the installation of a new intake system with embedded stainless steel stoplog gates. The work required specialized concrete construction to meet hydraulic passage finish requirements, strict temperature and thermal control specifications, and precise tolerances for embedded components.
Quattro Constructors is the prime contractor and completed the civil works required to decommission the existing intake and construct the new concrete intake structure. The scope included river diversion works, demolition of the existing concrete weir, riverbed lowering, and construction of a new intake chamber located approximately 3 m below the existing riverbed. The team placed over 200 m³ of 35 MPa Cast-in-Place concrete to form the new intake structure, including installation of stainless steel stoplog gates with tight tolerance requirements.
Additional activities included foundation preparation, installation of intake gates to high precision, installation of dowel and reinforcing steel, commissioning of the new intake chamber and coanda screen, and final removal of diversion systems and temporary river works.
- River diversion
- Demolition of existing structures
- Riprap placement
- Instream works
- Detailed sequencing and planning
- Coanda screen replacement
- New intake chamber & retaining construction with embeds and stoplogs
- Concrete formwork & placement efforts
City of Abbotsford
Bridges & Structures
Marine & Environmental
Excavation & Shoring
Dewdney, BC
