The Boulder County in Colorado, USA, sent Cemex USA a letter, terminating the company’s right to operate its cement plant near Lyons. The reason is a traffic study which determined that increased traffic at the plant, operating since 1965, has created a hazard, which improperly expanded the use of the cement plant. Since 1977, two quarries were used to support the use of the cement plant. Cemex has 30 days to provide evidence that the determination is incorrect, reduce the enlargement of the cement plant use, or appeal to the Boulder County Board of County Commissioners. Cemex will be able to operate its cement plant under current operating conditions until a final determination is made.