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Sens. Kelly and Lummis Introduce Bipartisan Legacy Mine Cleanup Act to Revitalise Abandoned Sites Across U.S.

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Published on September 11, 2025
Sens. Kelly and Lummis Introduce Bipartisan Legacy Mine Cleanup Act to Revitalise Abandoned Sites Across U.S.Source: Wikipedia/Gage Skidmore from Peoria, AZ, United States of America, CC BY-SA 2.0, via Wikimedia Commons

In an ongoing effort to address the concerning legacy of hazardous abandoned mines, Senators Mark Kelly (D-AZ) and Cynthia Lummis (R-WY) have put forward a new piece of legislation that promises to take a big step forward in remediation efforts. The bipartisan Legacy Mine Cleanup Act aims to streamline the process to deal with the estimated 140,000 derelict hardrock mines scattered throughout the United States. "In Arizona, abandoned uranium mines continue to threaten the health of our families, our land, and our water," Senator Kelly stated.

At the heart of the proposal is the formation of the Environmental Protection Agency's Office of Mountains, Deserts, and Plains (OMDP), which would be tasked with improving interagency collaboration, implementing best practices, and holding federal government accountable. These abandoned mines present a tapestry of risks, with unsecured tunnels and toxic waste posing serious threats to the environment and public health, especially on tribal lands. An "emphasis list" of priority sites for cleanups and the maintenance of an Interagency Plan to Address Uranium Contamination on the Navajo Nation are among the key responsibilities outlined for the new office.

"Protecting Wyoming and the west’s treasured landscapes requires moving beyond Washington’s typical one-size-fits-all mentality," Senator Lummis remarked. The act underscores the need for region-specific approaches and establishes provisions for the coordination of stakeholder agencies, and mandates updates on the cleanup progress for mines in need of remediation.

To spearhead these initiatives efficiently, the bill also calls for the OMDP to provide dedicated funding to assist Tribal communities with the necessary cleanup projects. Furthermore, it will cut bureaucratic red tape, simplifying the process for Tribes, conservation groups, and other organizations to receive assistance. This legislation builds upon Senator Kelly's past efforts, including the Good Samaritan Remediation of Abandoned Hardrock Mines Act and the acquisition of funding for cleaning up abandoned uranium mines on the Navajo Nation.