CANON CITY — Cotter Corp. is negotiating ways to finish cleanup of 15 million tons of radioactive uranium tailings while it copes with two recent contamination spills.

Final cleanup options being considered by state and federal officials include removal or burial of the waste.

According to the Denver Post (http://tinyurl.com/n4h5j9f ), Cotter vice president John Hamrick said any cleanup agreement will lay out timetables for the company to lay out options with cost estimates.

State officials are worried recent spills are affecting water supplies for area residents, including a nearby river.

On Monday, the company reported the second spill in four months of contaminated water, but the company says both spills have been contained on-site.

The now-defunct mill is in the process of decommissioning and has not been used to process uranium since 2006.

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Information from: The Denver Post, http://www.denverpost.com