Data / Mines / Colorado / Lyons Cement Plant Cemex Inc
Lyons Cement Plant Cemex Inc: 257 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Lyons Cement Plant Cemex Inc is an active cement processing facility in Boulder County, Colorado, operated by Cemex Construction Materials South LLC with 89 employees on MSHA's record (mine ID 0500344). Since January 1, 2022 MSHA inspectors issued 257 citations and orders there with $415,985 in proposed penalties, and 18 accident reports were filed there, with 11 injury or illness cases.
The request: Watch Lyons Cement Plant Cemex Inc (MSHA mine ID 0500344) in Boulder County, Colorado: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0500344
- Status
- Active since October 5, 1989
- Main commodity
- Cement
- Mine type
- Facility
- County
- Boulder County, Colorado
- Nearest town
- Lyons
- Operator
- Cemex Construction Materials South LLC
- Parent company
- Cemex S a
- Employees
- 89
- MSHA field office
- Denver CO Field Office
- Citations and orders since January 1, 2022
- 257
- Significant and substantial
- 33 (12.8%)
- Closure orders
- 1
- High negligence or reckless
- 11
- Proposed penalties
- $415,985
- Amount paid so far
- $355,239
- Inspections
- 26
- Inspector hours on site
- 806
- Citations per inspection
- 9.88 (all mines 2.30)
- Accident reports
- 18
- Injury and illness cases
- 11
- Fatalities
- 0
- Latest MSHA record
- August 4, 2026
- Citations issued to contractors here
- 27 ($11,810 proposed)
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 98 | 7 | $196,832 | 5 |
| 2023 | 44 | 3 | $61,011 | 0 |
| 2024 | 39 | 7 | $25,978 | 0 |
| 2025 | 47 | 6 | $75,456 | 4 |
| 2026 | 29 | 10 | $56,708 | 2 |
Standards cited most at Lyons Cement Plant Cemex Inc
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 31 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 25 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 22 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 21 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 20 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 9 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.4101 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.13021 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.14205 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12002 | Surface metal and nonmetal mines | 6 |
| 30 CFR 47.41 | Hazard communication | 6 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 5 |
Injury and illness cases at Lyons Cement Plant Cemex Inc
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 6 |
| No lost time, or an occupational illness | 5 |
What the accident reports at Lyons Cement Plant Cemex Inc describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 5 |
| Entrapment | 5 |
| Slip or fall of person | 4 |
| Fire | 1 |
| Handtools (nonpowered) | 1 |
| Ignition or explosion of gas or dust | 1 |
| Hoisting | 1 |
Equipment named in accident reports at Lyons Cement Plant Cemex Inc
| Equipment | Reports |
|---|---|
| Elevator | 6 |
| Hand tools (not powered) | 1 |
| Milling machinery | 1 |
Other open mines in Boulder County, Colorado
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Consolidated Caribou District | Grand Island Resources, LLC | Boulder County, CO | Gold ore | 12 | 13 |
| Cross Mine | Grand Island Resources, LLC | Boulder County, CO | Gold ore | 12 | 8 |
| Beech Hill Quarry | Loukonen Brothers Stone | Boulder County, CO | Dimension sandstone | 4 | 8 |
| Noland Quarry | Blue Mountain Stone Inc | Boulder County, CO | Dimension sandstone | 10 | 2 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.