The three asbestos mines included the Mount Vernon deposit in Grant County, the Raspberry Creek deposit in Jackson County and the Asbestos mine in Josephine County. The Mount Vernon deposit began production in 1959 where chrysotile asbestos was extracted. The Raspberry Creek deposit was mined for tremolite asbestos, beginning in 1943.
Vinyl asbestos floor tiles were produced by a number of manufacturers, and the decorative tile patterns were varied, often annually as styles and tastes changed. It is possible to make a tentative identification of floor tiles based on the individual tile pattern, color, and thickness.