The Colorado Department of Public Health and Environment said Friday the settlement resolves alleged violations dating to 2006.
Cemex spokeswoman Jennifer Borgen says most of the violations involved monitoring, record-keeping and reporting. She says plant equipment was over-reporting pollution levels, but they were still below standards.
The settlement is separate from a federal Environmental Protection Agency lawsuit filed last month accusing Cemex of violating federal law by not installing up-to-date pollution controls at the plant. Cemex has disputed those allegations.
Lyons is about 40 miles north of Denver.
