Corsa Coal Corporation has laid off about 40 employees at its Casselman Mine near Grantsville. The mine employed about 100 full-time workers, and the layoffs were attributed to a reduction in coal production. Corsa has reported net and comprehensive losses of $41.3 million and $47.1 million. Corsa also operates mines in Somerset County, Pennsylvania. The company was able to secure a Paycheck Protection Program loan in April, which kept employees on the payroll until now.