Data / Mines / Arizona / Yuma County
Mines in Yuma County, Arizona: 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 mines in Yuma County, Arizona, run by 8 operators and employing 86 people. Since January 1, 2022 its inspectors issued 83 citations and orders there with $34,922 in proposed penalties, and operators reported 1 injury or illness case. The operators with the most open mines are Dpe Materials, Inc; Onyx Crushing AZ LLC; Pg&e LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 11
- Operators
- 8
- Employees
- 86
- Active
- 4
- Intermittent
- 4
- Temporarily Idled
- 2
- New Mine
- 1
- Mines run by individuals, counted and not listed
- 1
- Citations and orders since January 1, 2022
- 83
- Significant and substantial
- 23 (27.7%)
- Closure orders
- 4
- High negligence or reckless
- 9
- Proposed penalties
- $34,922
- Amount paid so far
- $28,174
- Inspections
- 58
- Inspector hours on site
- 344
- Citations per inspection
- 1.43 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- August 13, 2026
Operators with the most open mines in Yuma County, Arizona
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 |
|---|---|---|---|---|---|
| Dpe Materials, Inc | 3 | 37 | 33 | $7,894 | 0 |
| Onyx Crushing AZ LLC | 2 | 5 | 4 | $1,211 | 0 |
| Pg&e LLC | 1 | 6 | 4 | $618 | 0 |
| Tacna Sand & Gravel LLC | 1 | 8 | 3 | $441 | 0 |
| Cornerstone Aggregates Inc | 1 | 0 | 0 | $0 | 0 |
| Fisher Sand & Gravel Company | 1 | 0 | 0 | $0 | 0 |
| Gutierrez Canales Engineering, PC | 1 | 17 | 0 | $0 | 0 |
Operators with the most citations in Yuma County, Arizona
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Dpe Materials, Inc | 3 | 37 | 33 | $7,894 | 0 |
| Onyx Crushing AZ LLC | 2 | 5 | 4 | $1,211 | 0 |
| Pg&e LLC | 1 | 6 | 4 | $618 | 0 |
| Tacna Sand & Gravel LLC | 1 | 8 | 3 | $441 | 0 |
| Cornerstone Aggregates Inc | 1 | 0 | 0 | $0 | 0 |
| Fisher Sand & Gravel Company | 1 | 0 | 0 | $0 | 0 |
| Gutierrez Canales Engineering, PC | 1 | 17 | 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 |
|---|---|---|---|---|---|
| Blaisdell | Dpe Materials, Inc | Yuma County, AZ | Construction sand and gravel | 13 | 18 |
| South Yuma Pit | Dpe Materials, Inc | Yuma County, AZ | Construction sand and gravel | 20 | 15 |
| Mohawk Rock | Pg&e LLC | Yuma County, AZ | Sand, common | 6 | 4 |
| Tacna Sand & Gravel LLC | Tacna Sand & Gravel LLC | Yuma County, AZ | Construction sand and gravel | 8 | 3 |
| Plant 1 | Onyx Crushing AZ LLC | Yuma County, AZ | Construction sand and gravel | 5 | 3 |
| Plant 4 | Onyx Crushing AZ LLC | Yuma County, AZ | Sand, industrial | 0 | 1 |
| Gce Blaisdell Mine | Gutierrez Canales Engineering, PC | Yuma County, AZ | Sand, industrial | 17 | 0 |
| Dome Valley Pit | Dpe Materials, Inc | Yuma County, AZ | Construction sand and gravel | 4 | 0 |
| Fisher Industries Plant 37 | Fisher Sand & Gravel Company | Yuma County, AZ | Construction sand and gravel | 0 | 0 |
| Cornerstone Wellton Mine | Cornerstone Aggregates Inc | Yuma County, AZ | Not stated | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 7 | 63.6% |
| Sand, industrial | 2 | 18.2% |
| Sand, common | 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 | 2 | 0 | $1,012 | 0 |
| 2023 | 17 | 8 | $12,602 | 1 |
| 2024 | 45 | 9 | $17,665 | 0 |
| 2025 | 8 | 2 | $1,829 | 0 |
| 2026 | 11 | 4 | $1,814 | 0 |
Standards cited most at mines in Yuma County, Arizona
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 56.14107 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.11012 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 3 |
| 30 CFR 46.5 | Training at sand, gravel and surface stone mines | 3 |
| 30 CFR 47.41 | Hazard communication | 2 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 2 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 2 |
| 30 CFR 56.15002 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at mines in Yuma County, Arizona
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 1 |
What the accident reports at mines in Yuma County, Arizona describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Powered haulage | 1 |
Equipment named in accident reports at mines in Yuma County, Arizona
| Equipment | Reports |
|---|---|
| Conveyor | 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.