Data / Mines / Arizona / Plant 3
Plant 3, La Paz County, Arizona: 2 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Plant 3 is an intermittent construction sand and gravel surface mine in La Paz County, Arizona, operated by Onyx Crushing AZ LLC with 4 employees on MSHA's record (mine ID 0203523). Since January 1, 2022 MSHA inspectors issued 2 citations and orders there with $302 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Plant 3 (MSHA mine ID 0203523) in La Paz County, Arizona: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0203523
- Status
- Intermittent since February 5, 2025
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- La Paz County, Arizona
- Nearest town
- Salome
- Operator
- Onyx Crushing AZ LLC
- Employees
- 4
- MSHA field office
- Mesa North AZ Field Office
- Citations and orders since January 1, 2022
- 2
- Significant and substantial
- 0 (0.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $302
- Amount paid so far
- $302
- Inspections
- 3
- Inspector hours on site
- 25
- Citations per inspection
- 0.67 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- April 22, 2026
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 |
|---|---|---|---|---|
| 2025 | 1 | 0 | $151 | 0 |
| 2026 | 1 | 0 | $151 | 0 |
Standards cited most at Plant 3
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 62.120 | Occupational noise exposure | 1 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 1 |
Other open mines in La Paz County, Arizona
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Security Pit | Colorado River Sand and Rock | La Paz County, AZ | Construction sand and gravel | 4 | 39 |
| Osborn Wash | Colorado River Sand and Rock | La Paz County, AZ | Construction sand and gravel | 2 | 34 |
| Copperstone Mine | Bonanza Explorations, Inc. | La Paz County, AZ | Gold ore | 4 | 9 |
| Vicksburg Pit | La Paz County Public Works | La Paz County, AZ | Construction sand and gravel | 0 | 8 |
| Boyer Gap | Rock Pros USA | La Paz County, AZ | Crushed, broken stone | 3 | 7 |
| Portable Crusher No. 1 | Rango Inc. | La Paz County, AZ | Iron ore | 2 | 6 |
| Portable Crushing & Screening | Pg&e LLC | La Paz County, AZ | Construction sand and gravel | 3 | 5 |
| Track #1 | Rock Pros USA | La Paz County, AZ | Sand, common | 0 | 4 |
| FNF Crushing 5 | Fnf Construction Inc | La Paz County, AZ | Construction sand and gravel | 0 | 2 |
| Lincoln Constructors Plant #1 | Lincoln Constructors | La Paz County, AZ | Construction sand and gravel | 0 | 0 |
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.