A large water main break along Crowchild Trail is causing travel delays for commuters in Calgary on Monday.
Southbound Crowchild Trail between Bow trail and 33 Avenue SW has been closed to the general public.
City crews worked through the night repairing a 600 mm section of pipe that had burst.
"A crack has since been discovered that runs from the break putting the total length at 6 m (21 ft)," the city said in a press release Monday. "The excavation was complicated by the discovery of an abandoned ATCO gas line that had to be removed by ATCO."
According to the city, this water main break is one of the largest Calgary has ever experienced.
"The 400 mm (16 inch) water main is cast iron and was installed in the 1930s," the statement read.
It's estimated that more than 50,000 commuters will be affected by the closure and drivers are being asked to find alternative routes or take public transit to ease the congestion.