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The bankrupt coal firm that owns the Kemmerer mine in southern Wyoming has provided too little detail in its restructuring plan for a reasonable review, a branch of the U.S. Department of Justice stated in an objection filed Friday.

The federal department’s protest does not address proposed cuts to retiree benefits and pensions that have been criticized recently by retired miners.

Westmoreland Coal Co., one of the oldest coal mining firms in the U.S., has attempted to speed through it bankruptcy proceedings since filing in early October. The company would sell off its core assets, restructure $90 million in debt and potentially terminate some obligations to retirees. Westmoreland paid $10.2 million in bonuses to executives in the year before its bankruptcy and has recently sought permission from the court to mete out retention bonuses to management over the course of the bankruptcy proceedings.