The Church Rock Uranium Mill Spill In 1968, the United Nuclear Corporation initiated mining operations in the largest underground uranium mine in the United States. July 16 will mark the 35th anniversary of the day in 1979 when a dam on the Navajo Nation near Church Rock, N.M., broke at an evaporation pond, releasing “94 million gallons of radioactive waste to the Puerco River, which flowed through nearby communities,” according to a May 2014 report from the U.S. General Accountability Office. “The Church Rock spill is the third largest nuclear accident after Fukushima and Chernobyl, and the largest in the US in terms of radiation released, but nobody knows about it.” Uranium Milling and the Church Rock Disaster This website describes the 'Churchrock Disaster' that occurred on July 16, 1979 at Churchrock, New Mexico on the Navajo Nation. A dusty cluster of industrial machinery set in the arid mesas of the great Southwest, its most distinguishing feature might be considered a … Located in Church Rock, New Mexico, in the Navajo Native American Reservation, the Church Rock Mill produced more than two million pounds of uranium oxide per year. "The Church Rock spill is the third largest nuclear accident after Fukushima and Chernobyl, and the largest in the US in … “The Church Rock spill symbolizes the governmental and societal indifference to the impacts of uranium development on Indigenous lands,” said Jantz. Northeast Church Rock (NECR) Mine Design Update (PDF) (4 pp, 13 MB, January 2020) This fact sheet provides a general overview of the United Nuclear Corporation (UNC) repository design for the Northeast Church Rock (NECR) Mine Site waste. 40 years ago today - Church Rock Uranium Mine Spill - and what we can do today 40 years ago today the uranium mill tailings disposal pond breached its dam and 1,100 tons of solid radioactive mill waste and approximately 93 million gallons of acidic, radioactive tailings solution flowed into Pipeline Arroyo, a tributary of the Puerco River. THE CHURCH ROCK URANIUM MILL TAILINGS SPILL: A HEALTH AND ENVIRONMENTAL ASSESSMENT Executive Summary The largest single release of liquid radioactive waste in the Uruted States occurred at the United Nuclear Corporation^ uranium mill near Church Rock, New Mexico, in July 1979. 9 Uranium Milling and the Church Rock Disaster Church Rock, New Mexico, would seem an improbable spot for a nuclear disaster. NOTE: This is a special ENCORE PRESENTATION of the 2019 40th anniversary of the disaster. Warnings were posted after the July 16, 1979, United Nuclear Corporation’s uranium tailings spill. Information includes the effects of the dam at Church Rock bursting and sending eleven hundred tons of radioactive mill wastes and ninety million gallons of contaminated liquid pouring downstream toward Arizona. The neglect of Navajo lands is evident when one compares the response to another nuclear accident that happened just four months prior at … A sign along the Rio Puerco warns residents in English, Spanish, and Diné to avoid the water in Church Rock, New Mexico. To be sure, the Church Rock spill is one of the more serious uranium mining accidents to occur on American Indian lands. This fact sheet provides site history and update of the cleanup progress of Northeast Church Rock Mine. This document reports the The spill, and effects from the mill’s continued operation after, landed the Church Rock on the National Priority List for Superfund sites in 1983. Church Rock Uranium Tailings Pond Spill Commemoration, July 16, 2019: Uranium mining marks the start of the nuclear fuel chain, the deadly journey uranium takes to become atomic weapons, nuclear reactors, and tons of highly radioactive waste. The health effects of the spill, however, are understudied, and little direct research addresses the health consequences of the spill on the Navajo (e.g., “One Upon a Mine: The Legacy of Uranium on the Navajo Nation” ). "The Church Rock spill symbolizes the governmental and societal indifference to the impacts of uranium development on Indigenous lands," said Jantz.

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