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ASPEN — Avalanche debris in Colorado鈥檚 high country could provide fresh breeding grounds for forest-destroying bark beetles.

But there鈥檚 little the agency can do to mitigate the threat, according to聽Scott Fitzwilliams, the supervisor of the White River National Forest.

He tells that downed spruce can be a perfect breeding ground for spruce beetles.

Heavy snowpack unleashed a series of avalanches over the winter that downed spruce and aspen trees in numerous areas.