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Army Corps, EPA launch $100 million cleanup effort at toxic Arizona mine site

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The Army Corps of Engineers and the EPA are teaming up to clean up contamination from an old mine and smelter site in Dewey-Humboldt.

Now, the federal government is conducting a survey to find qualified businesses to help.

The cleanup will mainly involve removing toxic soil, safely disposing of it and restoring the land, according to a set of plans the EPA finalized over the past two years.

Contracted cleanup teams will be expected to follow strict environmental laws so that the removal is thorough and safe, including some work in residential areas.

Overall, the long-term project could cost up to $100 million and is expected to start around 2026.

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Kirsten Dorman was a reporter at KJZZ from 2022 to 2025.