Kerry Black, a civil engineering professor at the University of Calgary, says water infrastructure across Canada is nearing the end of its service life, and issues like the Calgary water main break will be seen elsewhere in the coming years. 'This is a national problem. It's a North American problem,' she said. »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS For breaking news, video, audio and in-depth coverage: https://www.cbc.ca/news Follow CBC News on TikTok: https://