Title: Asbestos proves to be a microscopic road block near Boulder City On: 2014-07-20 Author: Las Vegas SunAsbestos proves to be a microscopic road block near Boulder CityLas Vegas SunAsbestos is a mineral fiber found in rock and soil. In the '60s and '70s, it was a popular building material. • Eldorado Hills, Calif.: Naturally occurring asbestos was found in this Sacramento suburb in September 2003 in the soil of the high school ...and more »