020-5 Wyo. Code R. § 5-5
Current through April 27, 2019
In addition to the requirements of Chapters 4 and 7, each operator shall ensure that the vertical distance between combined surface and underground mining activities working separate seams shall be sufficient to provide for the health and safety of the workers and to prevent surface water from entering the underground workings.
020-5 Wyo. Code R. § 5-5