Procedures used to develop the sampling design for the Occupational Hazard Survey of the Mining Industry are illustrated. Sample frames outline the active metal mines stratified by commodity and community for iron (7439896) ore, copper (7440508) ore, lead (7439921) and zinc (7440666) ores, silver (7440224) ore, aluminum (7429905) ore, cobalt (7440484), manganese (7439965), molybdenum (7439987), nickel (7440020), uranium (7440611), vanadium (7440622), clays, barite (13462867), phosphate (14265442) rock, gypsum (13397245), asbestos (1332214), mica (12001262), and vermiculite (1318009). Manually selected self representing units are listed by standard industrial classification, mine identification number, and by geographic location. A sample draw is presented for an occupational hazard survey of the mining industry that shows the name of the mine and types of employment at the particular facility, subunit types, other operations on the same property, and numbers of employees, as well as location and union memberships. The projection algorithm subroutine code for the estimation of population totals and variances is exhibited. Representative data for stratum 1 and stratum 2 population and sample data, with projected totals for cells 1 and 2, are shown.
Division of Respiratory Disease Studies, NIOSH, U.S. Department of Health and Human Services, Morgantown, West Virginia