Mining accident

Church Rock uranium mill spill

16 Jul 1979 · 35.65° N, 108.51° W

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What the records say

When
16 Jul 1979
Kind
Mining accident
Coordinates
35.65° N, 108.51° W
Description
spill in New Mexico on July 16, 1979

Church Rock uranium mill spill

Radioactive spill in New Mexico, United States

The Church Rock uranium mill spill occurred in the U.S. state of New Mexico on July 16, 1979, when United Nuclear Corporation's tailings disposal pond at its uranium mill in Church Rock breached its dam. The spill remains the largest release of radioactive material in U.S. history, having released more radioactivity than the Three Mile Island accident four months earlier.

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