Uranium Mill In Monument Valley
State: Arizona
Location: Monument Valley
Time Period: DOE (Remediation) May1989-Febraury 1990; September 1992 – May 1994
Facility Type: Department of Energy
Facility Description
This former uranium-ore processing mill operated from 1955 through 1968. This ore processing is covered under the auspices of the Radiation Exposure Compensation Act and is not separately covered under EEOICPA. However, DOE environmental remediation contractors performed environmental remediation under the Uranium Mill Tailings Radiation Control Act (Public Law 95-604) from May1989 to February 1990 and then again from September 1992 through May 1994. DOE and DOE contractor employees who performed this remediation are covered under EEOICPA.
Listing
Uranium Mill in Monument Valley is listed as a Department of Energy (DOE) site under the EEOICPA.
Uranium Mill in Monument Valley Workers
If you or your parent worked at this or any other DOE or AWE facility and became ill, you may be entitled to compensation of up to $400K plus medical benefits from the US Department of Labor. Call EEOICPA Counsel Hugh Stephens at 1-855-EEOICPA (336-4272) or fill out the form to the right, whether your claim has been accepted or denied.
We can help with all OWCP (Federal Workers Compensation) claims, impairments, wage loss and health care. 2495 Main Street, Suite 442, Buffalo, NY 14214.
Site Description and History
The Monument Valley processing site is located on the Navajo Nation in northeastern Arizona, about 15 miles south of Mexican Hat, Utah. A uranium-ore-processing mill operated at the site from 1955 to 1968 on property leased from the Navajo Nation. The mill closed in 1968, and control of the site reverted to the Navajo Nation. Most of the mill buildings were removed shortly thereafter.
From 1955 until 1964, ore at the site was processed by mechanical milling using an upgrader, which crushed the ore and separated it by grain size. The finer-grained material, which was higher in uranium content, was shipped to other mills for chemical processing. Coarser-grained material was stored on site. The milling process also produced radioactive mill tailings, a predominantly sandy material .
Source materials and other site-related contamination were removed during surface remediation at the site from 1992 through 1994. All contaminated materials from the Monument Valley processing site were transported north (about 10 miles) and encapsulated in the Mexican Hat disposal cell. However, analyses of subpile soil samples (samples collected beneath the “footprint” of the former tailings piles) at the site indicate contaminants in these soils may be a continuing source of groundwater contamination. Ammonium in the subpile soil appears to be contributing to nitrate contamination in groundwater.
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