EPCOR Drainage Service
Ph: (780) 509-8080
On October 12, a hole formed in the roadway at the intersection of 61 Avenue and 109 Street. The hole in the roadway is approximately 3 metres long, 1 metre wide and 23 metres deep. The hole formed as a result of an underground void which EPCOR discovered on October 8 during an inspection of a sewer trunk line.
There is no structural risk to homes and businesses in the area. Based on assessments so far, it appears the void area is limited to a section under 61 Avenue.
The sewer trunk line that runs under 61 Avenue is 1650mm in diameter and carries both storm and sanitary flows.
What's happening now
In order to further investigate and determine the extent of the damage and the scope of repairs we are installing a bypass system. Installing the bypass is complex due the depth and size of the sewer trunk line.
A bypass takes flows from the below ground drainage system, brings them above ground in a pipe to discharge the flow into a manhole away from the work area. Where the bypass crosses intersections, the pipe will be buried under the road to reduce traffic impacts. Bypasses are monitored 24 hours a day, 7 days a week, to ensure the safety of the public.
We are also constructing 3 shafts on 61 Avenue that will support the installation of the bypasses and provide safe access to the trunk line to begin a full assessment of the issue.
What to expect
Residents may experience some increased sewer odours as a result of the bypass. The pumps for the bypass will generate continual, low decibel noise. There will also be general noise as construction equipment and trucks will be used for material delivery, excavation and soil removal. EPCOR will do everything possible to manage noise associated with the construction. Lights will also be on around the work site through the night to allow for adequate monitoring.