Wastewater collection system operation
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A system of two pipes where one pipe carries wastewater and the other carries land drainage and surface runoff from rainstorms and snow melt.
Since the 1960s, new property developments in the city have been serviced by a two-pipe system.
The sewage or sanitary sewer system has about 1,182 km of dedicated pipes that are completely separate from the land drainage system.
A system of single pipes that carries rainfall and snow melt runoff from urban areas to the river system.
There are 1,372 km of land drainage sewers in Winnipeg.
Because of Winnipeg's relatively flat terrain, it is necessary to pump wastewater using lift stations to the interceptor sewers or to the water pollution control centres.
The main purpose of a lift station is to raise sewage to a higher level so that it can be moved into a sewer system where it can flow by gravity.
There are 76 wastewater pumping stations and 10 gravity-based wastewater diversion facilities located throughout the city.
The combined sewer system services an area of approximately 8,700 hectares or about 30% of the city.
The separate wastewater and land drainage sewers services an area of approximately 22,300 hectares or about 70% of the city.
This page was last updated on October 2, 2008