Time studies in underground coal mining

Kenilworth is situated in Carbon County, Utah, three miles east of Helper and is served by a branch line of the Denver and Rio Grande Western Railroad that Joins the main line at Helper, Utah. The coal mine was first established by the Utah Fuel Company and has been operated since 1907. Geology The rocks exposed in this area belong to the Cretaceous, Tertiary, and Quaternary periods. The exposed upper Cretaceous beds are the Mancos shale. The Tertiary (Eocene) beds are the Wasatch formation, and the Quaternary beds are the terrace gravels and alluvium. The rocks dip about 6° North. The coal-bearing rocks are affected by a few faults; however, their displacement is small. Their vertical movement is not more than, 25 feet, and mining operations are not greatly disturbed by the faulting. The faults trend N 70° E or N 70° W. The coal, which is bituminous, crops out along the walls of the canyon. There are at least six known coal seams: Castlegate "A," 'Castlegate "B," Royal Blue, Castlegate "C," Kenilworth (Castlegate "D"), and a coal bed "?," having different thicknesses from 3 to 18 feet. The upper "D" seam is being mined at present. It dips about 6° to the north and northeast and has a thickness of 9 to 15 feet.