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In 2015, AAI completed two CSIRO HI Cell stress measurements and installed six CSIRO HI Cells for long-term monitoring for the U.S. National Institute for Occupational Safety and Health (NIOSH) on the #2 Panel ahead of the longwall retreat at the Leer Mine (underground coal).  Two separate 50-foot roof and floor NQ2-diameter core holes were also drilled.


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