GATINEAU, QC, Sept. 10, 2012 /CNW/ - The Transportation Safety Board of
Canada (TSB) today released its investigation report (R11C0118) into
the 21 October 2011 derailment of a Canadian National Railway (CN)
freight train near Alix Junction, Alberta.
A freight train travelling southward from Mirror, Alberta to Calgary,
Alberta derailed seven cars on the Three Hills Subdivision, near Alix
Junction, Alberta. The derailed cars were carrying containers loaded
with a variety of products, some with dangerous goods. There were no
injuries, approximately 900 litres of phosphoric acid were released and
470 feet of track were destroyed. The investigation found that the
train derailment resulted from a sudden catastrophic failure of one of
the rails, likely due to an existing undetected defect. While testing
was carried out as per normal procedures and methods, these do not
always detect defects, leading to the risk of rail failures and
Since the accident, the revised federal Track Safety Rules made rail flaw testing more stringent. The railway company is also
working with its rail fatigue detection suppliers to improve testing
protocols and procedures.
The TSB is an independent agency that investigates marine, pipeline,
railway and aviation transportation occurrences. Its sole aim is the
advancement of transportation safety. It is not the function of the
Board to assign fault or determine civil or criminal liability.
SOURCE: TRANSPORTATION SAFETY BOARD OF CANADA
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