A report that was ordered by the B.C. government has come out saying the tailings spill at Mount Polley mine was caused by an inadequately designed dam that caused it's foundation to fail. The incident occurred last August at Mount Polley mine when the spill sent 24 million cubic metres of mine silt and water rushing out into area lakes and rivers.
The chair of the panel that investigated the spill, Norbert Morgenstern says evidence indicates there was a glacial lake deposit under the dam's foundation. The report says the glacial environment was not considered when the dam was designed causing the foundation to fail. The report also indicates there were no warning signs that could have alerted employees in advance the dam was going to fail.