Production from 1960 to 1961, was 37 304 m3 of crushed rock and 8 775 m3 of scalps. Los Angeles abrasian losses ranged from 35 to 64% and averaged 48%. Since extensive drilling is necessary to delineate reserves, future supplies should be obtained from the rail ballast quarry 7 km to the west-southwest where large reserves of superior quality quartzite are available in an area of lower visual impact.