History of Flooding at Pinyon Plain Mine (Formerly Canyon Mine)

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 ›

Canyon Mine Flooding as of 2023

How much water has been pumped out of Canyon Mine (aka Pinyon Plain Mine?)
 DESIGNED BY STEPHANIE SMITH, GRAND CANYON TRUST

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Canyon Mine Flooding as of 2021

Flooding at Canyon Mine
DESIGNED BY JOAN CARSTENSEN, GRAND CANYON TRUST

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Grand Canyon Blog

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The Colorado River below Glen Canyon Dam is heating up. Find out why.

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Scientists Call for Review of Grand Canyon Uranium Mine
11/18/24
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Groundwater pumping at a uranium mine near the Grand Canyon will affect the canyon's springs, scientists says.

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Arizona Governor Urges Review of Grand Canyon Uranium Mine
10/16/24
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Arizona Governor Katie Hobbs is the latest elected official to call for an environmental review of Pinyon Plain uranium mine.

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Related Resources

2024 Grand Canyon Monument Poll Memo

A December 2024 poll of 500 Arizona voters by public opinion research firm GQR found strong public support for Baaj Nwaavjo I’tah Kukveni – Ancestral Footprints of the Grand Canyon National Monument, which protects precious water sources and the ancestral homelands of Native American tribes near Grand Canyon National Park. Download the poll memo › Download […]

Fatal Accident Risk Along Pinyon Plain Haul Route Map

This map shows the risk of fatal accidents along the more than 300-mile transportation route from Canyon uranium mine (renamed Pinyon Plain Mine) near the Grand Canyon to the White Mesa uranium mill. Four of the five most dangerous sections along the route are on the Navajo Nation. See a photo gallery of the haul route, […]