Allegheny Mineral's plant in Slippery Rock has been awarded the Joseph A. Holmes Safety Association 2008 Safety award. The award recognizes outstanding safety records in the United States mineral extractive industries. The association works to prevent deaths and injuries, and to improve health and safety in the industry. In 2008, Slippery Rock Quarry employees worked 71,274 hours with no time lost to accidents. The quarry's safety record has been higher than the industry average for nine of the past 14 years.