Mining Operations: In 2007, a total of 725 nonmetal mining operations reported employment to the Mine Safety and Health Administration (MSHA). Nonmetal mines comprised 4.9% of all mining operations. 1. Mines producing common clay comprised 25.4% (n=184) of all nonmetal mining operations. 2. Nonmetal mining operations were located in all states and territories except Alaska, Delaware, Hawaii, Maine, New Hampshire, Rhode Island, Puerto Rico, and the U.S. Virgin Islands. Employees: A total of 22,864 employees, corresponding to 23,265 full-time equivalent (FTE) employees, were reported to MSHA by nonmetal mine operators in 2007. 1. Within the mining sectors, nonmetal mine operator employees accounted for 6.9% of all employee hours reported. 2. Employee hours were reported at underground (10.7%) and surface (89.3%) work locations. Fatalities: There was one work-related fatality in nonmetal mines in 2007. There were no fatalities in 2006. Nonfatal Lost-time Injuries: There were 508 nonfatal lost-time injuries (91 at underground and 417 at surface work locations) among nonmetal operator employees occurring at an overall rate of 2.5 injuries per 100 FTE employees. A total of 26,954 days lost from work resulted from these injuries. 1. The underground nonfatal lost-time injury rate was greater than the surface injury rate (3.7 vs. 2.4 per 100 FTE workers). 2. In 2007, the most frequent classification of non-fatal lost-time injuries involved handling materials (n=182; 35.8%). 3. Sprains and strains were the most frequently reported nature of injury (n=231; 45.5%). 4. The back was the most frequently reported body part injured (n=84; 16.5%) and accounted for 3,864 days lost from work.
NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236