Early Works activities continue at the Canadian Port of Entry (POE) with the installation of a sanitary sewer system. The new sanitary sewer system is comprised of 14 concrete manholes and more than one kilometre of polyvinyl chloride (PVC) pipes. The pipes are buried in a trench below the perimeter access road. More than 170 sections of pipe ranging from 30 centimetres to 52 centimetres in diameter will be joined together to form the sewage system. The trench, which will be up to eight metres deep, will require one of the deepest excavations at the Canadian Port of Entry.
Once the PVC pipes and manholes are installed, the trench is filled with granular material which is then compacted and graded. The manholes will allow access to the sanitary system for routine maintenance and inspection.
As the sanitary system relies on gravity to move sewage, the trench is sloped 23 centimetres for every 100 metres. From the deepest point, the sanitary sewer system will rise a total of 2.3 metres over the entire one kilometre length. This 2.3 metre rise is critical to effectively drain the sanitary system.
The sanitary sewer system at the Canadian Port of Entry will connect to a new sanitary pumping station and ultimately to a waste treatment facility. The new sanitary system will service the new facilities to be built at the Canadian Port of Entry as well as existing facilities on adjacent properties.