Canyon Mine, also known as Pinyon Plain Mine, a uranium mine near the south rim of Grand Canyon National Park, has been flooding with groundwater since late 2016, according to data reported to the Arizona Department of Environmental Quality. Water pumped out of the mine has shown high levels of heavy metals including uranium, arsenic, and lead. Learn more about uranium mining near the Grand Canyon ›
Four of the five most dangerous sections of the haul route are on the Navajo Nation.
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