What are uranium mill tailings?
Uranium mill tailings are the sandy, radioactive byproduct of uranium production at a conventional uranium mill. Prior to the recognition and regulation of their hazards, uranium mill tailings were used as a building material in Mesa County. The tailings were commonly used in foundations, mortar, driveways, soil, and other places on a property. While many properties were cleaned up by the Grand Junction Remedial Action Program (GJRAP) and the Uranium Mill Tailings Remedial Action Program (UMTRA) in the 70’s, 80’s and 90’s, uranium mill tailings can still be found at numerous locations throughout the county.
What are the risks associated with uranium mill tailings?
Long-term exposure to uranium mill tailings can lead to cancer. Radium, which is a component of uranium mill tailings, is radioactive, emitting gamma radiation (high energy x-rays) and forming radon gas. Exposure to gamma radiation has been linked to cancer. Radon is the second-leading cause of lung cancer in the United States.
Everyone is exposed to radiation and radon gas from naturally occurring sources. Exposure to radiation is also common for medical purposes such as x-rays, CT scans, or radiation therapy. While the amount of radiation exposure caused by uranium mill tailings is often similar to exposures received in medical diagnostic procedures, it is recommended that all non-essential exposures be kept as low as possible.
How can I tell if a property has uranium mill tailings?
Gamma radiation surveys are the best way to locate uranium mill tailings. Many properties in Mesa County were surveyed in the past and results may be on file. If results are not on file, a new survey can be requested. Gamma radiation meters are also available for loan, free of charge, so that interested individuals can perform their own surveys. Contact the Colorado Department of Public Health and Environment for more information.
What should I do if mill tailings are present on my property?
Unless a property owner is applying for a building permit, no action is required. However, when possible, removal of uranium mill tailings is recommended. While the cost of removing the tailings is the responsibility of the property owner, uranium mill tailings can be disposed of in Grand Junction free of charge. Tailings removal may be performed by homeowners or by contractors. Several local contractors have experience in removing uranium mill tailings. Contact CDPHE for more information.
In instances where the removal of mill tailings is not a viable option, CDPHE UMTRA Program staff in Grand Junction can provide information on other methods to minimize the hazards of uranium mill tailings.
For more information about uranium mill tailings, contact one of the following individuals in Grand Junction:
Michael Cosby CDPHE.Colorado.Gov/UMTS
UMTRA Specialist
michael.cosby@state.co.us
970-248-7171