I was curious to know the context for the pipeline which ruptured near Sundre, Alberta, on Thursday. Checking the news, I discovered that it had collapsed under Jackson Creek, described as a tributary of the Red Deer River, between Sundre and Gleniffer Lake, the reservoir downstream created by the Dickson Dam.
Jackson Creek was not an easy stream to locate, but the Atlas of Canada, maintained by Natural Resources Canada, had it drawn on NTS mapsheet 082O15.
It's a busy area: little Jackson Creek itself has three pipelines crossing it and nearby are more pipelines and oil wells. The odds of spills like this NOT happening are the surprise.