Through an access-to-information request, CBC News obtained a data set of every pipeline safety incident reported to the National Energy Board between 2000 and 2012. The NEB only oversees 71,000 pipelines that cross provincial or international borders (about a tenth of the overall network. The remaining 760,000 kilometres are monitored by the provinces). The NEB data is based on the requirement that companies must report safety issues including the death or serious injury of a worker, fires, explosions, liquid product spills over 1,500 litres and every gas leak, but it is clear from the discussion of the data that Canada lacks a transparent and accurate reporting system, despite the recommendation for improvements from a Senate committee. The data provided to the CBC show that there were 142 pipelines safety incidents in 2011, and that the rate of pipeline incidents has doubled in the past decade. Most incidents have occurred in B.C., followed by Alberta, followed by Ontario.
The interactive map at: http://www.cbc.ca/news2/interactives/pipeline-incidents/ and allows you to specify the category of “serious accidents” or “fatalities” to see brief summaries of incidents, usually relating to worker safety.
For an explanation of the limitations of Canadian data see: http://www.cbc.ca/news/canada/pipeline-safety-canada-lags-u-s-on-making-data-public-1.2254793 and http://www.cbc.ca/news/pipeline-safety-incidents-how-we-organized-the-data-1.2251835.