WHITESVILLE, W.Va. (AP) — On the heels of a West Virginia coal mining death, families of the 29 men killed in the Upper Big Branch mine dedicated a memorial Friday to their fallen relatives and those injured in the April 2010 explosion.

An outpouring of support helped complete the memorial a year ahead of schedule, according to the project’s volunteers. But still ongoing is a federal criminal investigation into the worst U.S. coal mining disaster in four decades.

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