The mining industry is getting another chance to comment on proposed federal rules to expand drug testing to more than 116,000 coal miners.

The federal Mine Safety and Health Administration said Thursday it's holding a second public hearing on the rules and extending the deadline for filing comments until Nov. 10.

MSHA says the public will be able to comment at its Arlington, Va., headquarters, the National Mine Health and Safety Academy in Beaver and sites in Birmingham, Ala., and Virginia, Minn.

Labor unions and mine operators criticized the proposed rules at an Oct. 14 hearing, asking MSHA for sweeping changes to the proposal or for it to be dropped.

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