Data / Mines / Colorado / Delta County
Mines in Delta County, Colorado: 12 open mines
MSHA lists 12 open mines in Delta County, Colorado, run by 10 operators and employing 44 people. Since January 1, 2022 its inspectors issued 54 citations and orders there with $10,817 in proposed penalties, and operators reported 3 injury or illness cases. The operators with the most open mines are Arizona Materials; Best Sand and Gravel, LLC; Black Canyon Aggregate Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 12
- Operators
- 10
- Employees
- 44
- Active
- 6
- Temporarily Idled
- 2
- Intermittent
- 2
- NonProducing
- 1
- New Mine
- 1
- Citations and orders since January 1, 2022
- 54
- Significant and substantial
- 7 (13.0%)
- Closure orders
- 0
- High negligence or reckless
- 5
- Proposed penalties
- $10,817
- Amount paid so far
- $10,817
- Inspections
- 100
- Inspector hours on site
- 506
- Citations per inspection
- 0.54 (all mines 2.30)
- Accident reports
- 3
- Injury and illness cases
- 3
- Fatalities
- 0
- Latest MSHA record
- October 27, 2026
Operators with the most open mines in Delta County, 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 |
|---|---|---|---|---|---|
| Arizona Materials | 2 | 8 | 9 | $2,244 | 0 |
| Best Sand and Gravel, LLC | 2 | 14 | 5 | $604 | 0 |
| Black Canyon Aggregate Inc | 1 | 4 | 20 | $5,076 | 0 |
| Bowie Resources LLC | 1 | 4 | 6 | $978 | 1 |
| Colorado Lime Company | 1 | 3 | 6 | $880 | 0 |
| Oldcastle SW Group, Inc. | 1 | 2 | 4 | $582 | 2 |
| Benson Brothers Aggregate | 1 | 3 | 3 | $302 | 0 |
| Steincrusher LLC | 1 | 3 | 1 | $151 | 0 |
| Delta County Commissioners | 1 | 0 | 0 | $0 | 0 |
| Farnsworth Construction | 1 | 3 | 0 | $0 | 0 |
Operators with the most citations in Delta County, 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 |
|---|---|---|---|---|---|
| Black Canyon Aggregate Inc | 1 | 4 | 20 | $5,076 | 0 |
| Arizona Materials | 2 | 8 | 9 | $2,244 | 0 |
| Bowie Resources LLC | 1 | 4 | 6 | $978 | 1 |
| Colorado Lime Company | 1 | 3 | 6 | $880 | 0 |
| Best Sand and Gravel, LLC | 2 | 14 | 5 | $604 | 0 |
| Oldcastle SW Group, Inc. | 1 | 2 | 4 | $582 | 2 |
| Benson Brothers Aggregate | 1 | 3 | 3 | $302 | 0 |
| Steincrusher LLC | 1 | 3 | 1 | $151 | 0 |
| Delta County Commissioners | 1 | 0 | 0 | $0 | 0 |
| Farnsworth Construction | 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 |
|---|---|---|---|---|---|
| Black Canyon Aggregate Inc | Black Canyon Aggregate Inc | Delta County, CO | Construction sand and gravel | 4 | 20 |
| Bowie No 2 Mine | Bowie Resources LLC | Delta County, CO | Coal (bituminous) | 4 | 6 |
| Colorado Lime Company | Colorado Lime Company | Delta County, CO | Dimension limestone | 3 | 6 |
| Best Sand and Gravel | Best Sand and Gravel, LLC | Delta County, CO | Construction sand and gravel | 7 | 5 |
| Crusher 2 | Arizona Materials | Delta County, CO | Construction sand and gravel | 5 | 5 |
| HP 300 (Crusher 4) | Arizona Materials | Delta County, CO | Construction sand and gravel | 3 | 4 |
| CR4 | Oldcastle SW Group, Inc. | Delta County, CO | Construction sand and gravel | 2 | 4 |
| Benson Brothers Aggregate | Benson Brothers Aggregate | Delta County, CO | Construction sand and gravel | 3 | 3 |
| Steincrusher LLC | Steincrusher LLC | Delta County, CO | Construction sand and gravel | 3 | 1 |
| Washplant | Best Sand and Gravel, LLC | Delta County, CO | Construction sand and gravel | 7 | 0 |
| Cedar Rapids 1 | Farnsworth Construction | Delta County, CO | Coal (bituminous) | 3 | 0 |
| Delta County Dist 4 Crusher | Delta County Commissioners | Delta County, CO | Construction sand and gravel | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 9 | 75% |
| Coal (bituminous) | 2 | 16.7% |
| Dimension limestone | 1 | 8.3% |
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 | 10 | 1 | $3,524 | 2 |
| 2023 | 13 | 0 | $1,859 | 0 |
| 2024 | 9 | 3 | $2,278 | 0 |
| 2025 | 14 | 1 | $2,250 | 0 |
| 2026 | 8 | 2 | $906 | 1 |
Standards cited most at mines in Delta County, 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 56.14100 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 4 |
| 30 CFR 41.12 | Notice of legal identity | 3 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 3 |
| 30 CFR 77.404 | Surface coal mines, safety | 2 |
| 30 CFR 47.41 | Hazard communication | 2 |
| 30 CFR 56.12013 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 2 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 2 |
| 30 CFR 46.3 | Training at sand, gravel and surface stone mines | 2 |
| 30 CFR 46.9 | Training at sand, gravel and surface stone mines | 2 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
| 30 CFR 77.1605 | Surface coal mines, safety | 1 |
Injury and illness cases at mines in Delta County, Colorado
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 2 |
| No lost time, or an occupational illness | 1 |
What the accident reports at mines in Delta County, Colorado describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handtools (nonpowered) | 2 |
| Handling of materials | 1 |
Equipment named in accident reports at mines in Delta County, Colorado
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 2 |
Updated November 6, 2026. Read from US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets. 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.