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CHALLIS, Idaho -- Conservationist groups hoping to see a new national monument in central Idaho have added about 21,000 acres to the plan.

The Idaho Conservation League, Wilderness Society and others want the Obama administration to create a national monument in the Boulder-White Clouds.

The Times-News reports that the additional acres include Malm Gulch, an area containing petrified sequoia trees and managed by the Bureau of Land Management.

The additional area increases the size of the proposed monument to 591,905 acres.

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