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St. Mary Canal Siphons Failure Updated Information

On June 17, 2024, both St. Mary River siphons experienced structural failures outside Babb, Montana. The breach caused substantial water discharge, affecting the surrounding areas. The breach led to severe erosion, resulting in washout areas at the breach site, impacting the hill and concrete footings holding the pipes. Water flows are expected to continue throughout the day. They are anticipated to subside sometime this afternoon as the canal drains.

The majority of the damage is located on lands administered by the Blackfeet Tribe. The flooding caused road closures and disruptions to utiliti...


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