PINEVILLE, Ky. (AP) — A former supervisor of a coal mine near Pineville, Kentucky, has pleaded guilty to violating a mandatory safety standard that led to the death of an employee.

The Lexington Herald-Leader (http://bit.ly/1TLmwWB ) reports that Anthony Tyler Cornett pleaded guilty Wednesday.

Federal records state that Cornett allowed the employee, 31-year-old Justin Mize of Tennessee, to crawl into an auger hole at the Commonwealth Mining LLC Tinsley Branch HWM 61 mine in 2014. The auger hole had no support for the roof.

The U.S. Mine Safety and Health Administration states that a slab of rock fell from the roof, crushing Mize. Mize later died while being transported to a trauma center.

Cornett is scheduled to be sentenced in August. He faces up to one year in prison and a $250,000 fine.