07/05/2011 07:34 EDT | Updated 09/04/2011 05:12 EDT

100 Pipeline Spills And Accidents Since 2010

AP File

OTTAWA -- The Transportation Safety Board of Canada has logged 100 different incidents and accidents on federally regulated Canadian oil and gas pipelines over the past two years, new documents released to Postmedia News reveal.

The log entries by investigators are dominated by two Alberta-based companies, Enbridge and TransCanada, which are involved in nearly three quarters of the reported cases, including 21 incidents on the latter's brand new, multibillion-dollar Keystone pipeline, which launched the first phase of its commercial operation in June 2010.