Sewer Maintenance Programs
The City of Mission has various programs to ensure the continued effective operation of the sewer system:
Sewer Main Flushing
Where high-pressure water via a hose and nozzle are pulled through flat grade sewer mains to remove the build up of grease and debris. The frequency of flushing (from once every 45 days to once every 2 years) is determined by just how flat the sewer grade is and historical records on the build up of grease and debris.
Where a small tractor-mounted camera is driven through the sewer mains looking for defects and potential blockage problems. Each section of sewer main is inspected about every 6 years.
Maintenance Hole Inspection
Where city staff will open the lid and visually inspect the sewer line and the maintenance hole (often called manhole) for signs of debris accumulation or evidence of sewer backup. Maintenance hole inspection is performed annually and may require city staff to access private property when a sewer line runs through back or side yards. Part of the inspection is also to ensure the maintenance hole is visible and accessible to clear a potential sewer blockage.
Pump Station Inspection
Where city staff perform a variety of tasks to ensure each of the 8 sewer pump stations work without service interruption. The tasks include weekly inspections, monthly back-up emergency generator runs (each pump station has a generator in case of power outage) semi-annual servicing, and annual emergency back up pump runs (the City owns a trailer mounted pump, which can be transported to a station to replace a failed pump).