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Midnite Mine
Midnite Mine is an inactive former uranium mine in the Selkirk Mountains of eastern Washington. Located within the reservation of the Spokane Tribe of Indians, the mine was operated from 1955 until 1981.
Two open pits, backfilled pits, and a number of waste rock piles and ore/protore stockpiles remain on site. In addition to elevated levels of radioactivity, heavy metals mobilized in acid mine drainage pose a potential threat to human health and the environment. The site drains to Blue Creek, which enters the Spokane Arm of Franklin D. Roosevelt Lake. Contaminated water emerging below the waste rock and ore piles is currently captured for treatment in an on-site treatment system.
The final cleanup plan (Record of Decision, or ROD) for the site was issued September 29, 2006.
Midnite Mine Superfund Site Spokane Indian Reservation Washington Record of Decision (PDF) - September 2006 (248pp., 6.2MB, About PDF) | |
Record of Decision, Revised Table 7-6 (1pp., 73K, PDF)
The cleanup plan calls for a cap over an area of pits filled with waste during mining, consolidation and engineered containment of remaining waste in the two open pits, removal of water entering the pits, and operation of a treatment system to treat contaminated water from the pits and seeps.
The Record of Decision initiates the design phase. Design of the cleanup will include data collection to support detailed construction plans and is expected to take several years.
Please read supporting Technical Documents
[ Main Cleanup | Brownfields ]
[ Superfund | FOIA | Records Center ]
Point of contact: Ellie Hale
E-Mail: hale.ellie@epamail.epa.gov
Phone Number: (206) 553-1215
Last Updated: 11/21/2007
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