Review finds no evidence of ‘unprofessional conduct’ in Calgary water main break
CBC
May 28, 2025
As the one-year anniversary of last June’s catastrophic water main break approaches, an independent review of the incident suggests that there was no wrongdoing by the City of Calgary’s engineering or geoscience services.
The findings of a new report by the Association of Professional Engineers and Geoscientists of Alberta (APEGA) suggest that the pre-stressed concrete cylinder pipe (PCCP) failure experienced by the Bearspaw south feeder main is consistent with incidents across North America.
“PCCP manufacturing standards were relaxed from the late 1960s to the early 1970s by the American Water Works Association, resulting in a high rate of premature failures, and standards have since been strengthened,” reads a release by APEGA.