Cause of 2018 Old Fort Landslide remains undetermined

FORT ST. JOHN, B.C. – A provincial report says we may never know the root cause of the 2018 Old Fort Landslide.

According to the report, external geotechnical assessments have not conclusively determined the root cause or trigger for the landslide.

There were a number of factors that may have led to the slide, such as natural slope instability, extensive rainfall, and the Deasan gravel pit located above Old Fort, but the report notes that the exact cause may never be determined with certainty.

The report says the timing of stockpile placement on the Deasan site has led to public speculation that the added weight was a trigger for the landslide, but this can neither be proven nor discounted based on the available information.

The mine could be allowed to open again if operators can demonstrate that further mining will not negatively impact slope stability and in a manner that is protective of the health and safety of mineworkers and the environment.  The mine owners will also need to engage with the Peace River Regional District, the Ministry of Transportation & Infrastructure, and neighbouring property owners for any proposed plan for mining activity.

The report also includes new recommendations for other mine sites around B.C. to review geohazard risks that arise from mining activities.

After almost two years since the original landslide, an evacuation order remains in place for several properties above and below the landslide.

The full report can be found on the Province’s website.