ADEQ details river reroute, tailings stabilization and explains limits on mining authority

Sep 22, 2026

ADEQ described emergency work to reroute the Hassayampa River away from an unstable tailings pile, estimated close to $1 million in emergency costs with court cost recovery steps, and clarified ADEQ regulates discharges while the state mine inspector regulates mining activity.

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ADEQ’s deputy director said emergency remediation at the Senator site included rerouting the Hassayampa River away from a slumping tailings pile, regrading and stabilization to reduce the chance heavy metals wash into the stream.

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