Responsible Containment Reauthorization Act

This bill extends the authorization for a uranium mill tailings disposal site in Mesa County, Colorado, until the site is filled to its designed capacity. It directly affects the facility operators and local communities by allowing them to continue using the site for waste disposal beyond the current expiration date. The legislation amends the Uranium Mill Tailings Radiation Control Act of 1978 to remove the previous September 30, 2031 deadline, replacing it with a condition based on the site reaching its intended capacity. This change provides regulatory certainty for ongoing operations at the disposal facility.