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CALGARY – The commute to work was slowed to a crawl for hundreds of drivers attempting to travel into the downtown core on Thursday, due to a massive sinkhole.

City crews were forced to close 14th Street N.W. in both directions between Rosehill Drive and 24th Avenue N.W. after a gaping hole opened in the middle of the southbound lanes.

Southbound traffic travelling towards the downtown core was detoured down 10th Street N.W. to 16th Avenue N.W.

By late Thursday morning, officials had extended the closure, putting it in place in both directions between Northmount Drive and 24th Avenue N.W.

It’s thought the sinkhole may have been caused by a watermain break.

The break affected about 30 homes which were without water.

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On Friday morning, city crews were able to open one lane of 14th Street N.W. in each direction between Northmount Drive and 24 Avenue N.W.