Data / Mines / Colorado / Nonmetal mines
Nonmetal mineral mines in Colorado: 11 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 11 open nonmetal mineral mines in Colorado, run by 11 operators and employing 128 people. Since January 1, 2022 its inspectors issued 267 citations and orders there with $270,266 in proposed penalties, and operators reported 19 injury or illness cases. The operators with the most open mines are Arcosa LWB, LLC; Colorado Sand Company; Cmt Excavating Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 11
- Operators
- 11
- Employees
- 128
- Intermittent
- 7
- Active
- 3
- Temporarily Idled
- 1
- Citations and orders since January 1, 2022
- 267
- Significant and substantial
- 51 (19.1%)
- Closure orders
- 3
- High negligence or reckless
- 18
- Proposed penalties
- $270,266
- Amount paid so far
- $236,625
- Inspections
- 101
- Inspector hours on site
- 972
- Citations per inspection
- 2.64 (all mines 2.30)
- Accident reports
- 19
- Injury and illness cases
- 19
- Fatalities
- 0
- Latest MSHA record
- September 18, 2026
Operators with the most open mines in Colorado
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Arcosa LWB, LLC | 1 | 10 | 176 | $254,205 | 10 |
| Colorado Sand Company | 1 | 85 | 39 | $6,482 | 8 |
| Cmt Excavating Inc | 1 | 5 | 21 | $4,451 | 0 |
| Dicaperl Minerals LLC | 1 | 1 | 14 | $2,290 | 1 |
| Siloam Stone Inc | 1 | 4 | 7 | $1,314 | 0 |
| Lucky VI Quarry | 1 | 2 | 5 | $769 | 0 |
| American Gypsum Company LLC | 1 | 13 | 4 | $612 | 0 |
| Summit Pressed Brick & Tile Company | 1 | 1 | 1 | $143 | 0 |
| Crossfire Aggregate Services, LLC | 1 | 3 | 0 | $0 | 0 |
| General Shale Brick, Inc. | 1 | 1 | 0 | $0 | 0 |
| Glacier Peak Mining LLC | 1 | 3 | 0 | $0 | 0 |
Operators with the most citations in Colorado
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Arcosa LWB, LLC | 1 | 10 | 176 | $254,205 | 10 |
| Colorado Sand Company | 1 | 85 | 39 | $6,482 | 8 |
| Cmt Excavating Inc | 1 | 5 | 21 | $4,451 | 0 |
| Dicaperl Minerals LLC | 1 | 1 | 14 | $2,290 | 1 |
| Siloam Stone Inc | 1 | 4 | 7 | $1,314 | 0 |
| Lucky VI Quarry | 1 | 2 | 5 | $769 | 0 |
| American Gypsum Company LLC | 1 | 13 | 4 | $612 | 0 |
| Summit Pressed Brick & Tile Company | 1 | 1 | 1 | $143 | 0 |
| Crossfire Aggregate Services, LLC | 1 | 3 | 0 | $0 | 0 |
| General Shale Brick, Inc. | 1 | 1 | 0 | $0 | 0 |
| Glacier Peak Mining LLC | 1 | 3 | 0 | $0 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Arcosa Boulder Plant #1604 | Arcosa LWB, LLC | Jefferson County, CO | Common shale | 10 | 176 |
| Keenesburg #2 | Colorado Sand Company | Weld County, CO | Sand, industrial | 85 | 39 |
| Church Harvey Mine | Cmt Excavating Inc | Jefferson County, CO | Common clays | 5 | 21 |
| El Grande | Dicaperl Minerals LLC | Conejos County, CO | Perlite | 1 | 14 |
| Bedrock / Pinion | Siloam Stone Inc | Pueblo County, CO | Common shale | 4 | 7 |
| Lyons Pit | Lucky VI Quarry | Custer County, CO | Phosphate rock | 2 | 5 |
| Eagle Gypsum Mine | American Gypsum Company LLC | Eagle County, CO | Gypsum | 13 | 4 |
| Fox Clay Pit | Summit Pressed Brick & Tile Company | Pueblo County, CO | Common clays | 1 | 1 |
| Topaz Mountain Gem Mine | Glacier Peak Mining LLC | Park County, CO | Gemstones | 3 | 0 |
| Track Jaw Crusher PS330 | Crossfire Aggregate Services, LLC | Archuleta County, CO | Quartz, ground | 3 | 0 |
| Denver Plant 60 Clay Mines | General Shale Brick, Inc. | Jefferson County, CO | Clay, ceramic, refractory mnls. | 1 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Common clays | 2 | 18.2% |
| Common shale | 2 | 18.2% |
| Clay, ceramic, refractory mnls. | 1 | 9.1% |
| Perlite | 1 | 9.1% |
| Gypsum | 1 | 9.1% |
| Gemstones | 1 | 9.1% |
| Sand, industrial | 1 | 9.1% |
| Quartz, ground | 1 | 9.1% |
| Phosphate rock | 1 | 9.1% |
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 | 53 | 14 | $81,849 | 3 |
| 2023 | 63 | 9 | $51,105 | 6 |
| 2024 | 75 | 15 | $47,858 | 4 |
| 2025 | 66 | 11 | $87,933 | 4 |
| 2026 | 10 | 2 | $1,521 | 2 |
Standards cited most at nonmetal mineral mines in Colorado
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 | 28 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 20 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 18 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 17 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 17 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 11 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 9 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 6 |
| 30 CFR 47.41 | Hazard communication | 6 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 6 |
Injury and illness cases at nonmetal mineral mines in Colorado
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 2 |
| Days away from work or restricted activity | 11 |
| No lost time, or an occupational illness | 6 |
What the accident reports at nonmetal mineral mines in Colorado describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 6 |
| Slip or fall of person | 4 |
| Powered haulage | 4 |
| Other | 2 |
| Handtools (nonpowered) | 2 |
| Machinery | 1 |
Equipment named in accident reports at nonmetal mineral mines in Colorado
| Equipment | Reports |
|---|---|
| Front-end loader | 2 |
| Hand tools (not powered) | 2 |
| Conveyor | 1 |
| Trucks | 1 |
| Shovel | 1 |
| Mancar | 1 |
| Forklift | 1 |
| Hand tools (powered) | 1 |
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.