Rio Tinto Minerals, Inc. safety record at a glance
Rio Tinto Minerals, Inc. has been the subject of 27 Cal/OSHA inspections in California since 2000, opened between Jun 3, 2008 and Jun 22, 2026. 15 of them were planned inspections. 13 of them produced citations, 23 in all: 3 serious. Inspectors proposed $44,270 in penalties; after appeals and settlements the current total is $33,020. The largest single penalty, $11,750, came from an inspection opened Sep 25, 2014 in Wilmington. That places the employer at #3,026 of 122,854 California employers in the database by penalties.
Industry as coded by the inspecting office: Mining, Quarrying, and Oil and Gas Extraction; Manufacturing. Worksites in Cartago, Wilmington, Lone Pine, Boron.
Every inspection, newest first
Click a date for the citations in that inspection.
| Opened | City | Why | Result | Proposed | Penalty | Closed |
|---|---|---|---|---|---|---|
| Jun 22, 2026 | Cartago | Planned | no citations | 0 | 0 | Jul 13, 2026 |
| Apr 15, 2024 | Cartago | Planned | no citations | 0 | 0 | May 6, 2024 |
| Feb 9, 2021 | Cartago | Planned | no citations | 0 | 0 | Mar 23, 2021 |
| Mar 3, 2020 | Wilmington | Accident | 3 citations | $6,120 | $6,120 | Aug 12, 2020 |
| Aug 26, 2019 | Cartago | Planned | no citations | 0 | 0 | Nov 1, 2019 |
| Jul 25, 2018 | Cartago | Planned | 1 citation | $225 | $225 | Sep 5, 2018 |
| Aug 16, 2017 | Cartago | Planned | 2 citations | $225 | $225 | Sep 27, 2017 |
| Sep 28, 2016 | Cartago | Planned | no citations | 0 | 0 | Oct 6, 2016 |
| Apr 21, 2016 | Wilmington | Complaint | 2 citations | $1,500 | $1,500 | Sep 30, 2016 |
| Aug 11, 2015 | Lone Pine | Planned | 1 citation | $150 | $150 | Feb 5, 2016 |
| Oct 29, 2014 | Boron | Complaint | 1 citation | $935 | $935 | Dec 28, 2015 |
| Sep 25, 2014 | Wilmington | Complaint | 2 citations 1 serious | $23,000 | $11,750 | Jan 11, 2016 |
| Sep 17, 2014 | Lone Pine | Planned | no citations | 0 | 0 | Sep 17, 2014 |
| Aug 9, 2012 | Lone Pine | Planned | 1 citation | $225 | $225 | Sep 13, 2012 |
| Apr 13, 2011 | Boron | Accident | no citations | 0 | 0 | Jun 13, 2011 |
| Jul 8, 2010 | Boron | Complaint | 1 citation | $185 | $185 | Dec 1, 2010 |
| Jun 23, 2010 | Boron | Complaint | no citations | 0 | 0 | Jun 24, 2010 |
| Jun 14, 2010 | Boron | Accident | no citations | 0 | 0 | Jul 6, 2010 |
| Feb 10, 2010 | Boron | Planned | no citations | 0 | 0 | Feb 25, 2010 |
| Mar 20, 2009 | Boron | Complaint | no citations | 0 | 0 | Apr 7, 2009 |
| Jan 22, 2009 | Wilmington | Complaint | no citations | 0 | 0 | Apr 14, 2009 |
| Dec 9, 2008 | Boron | Planned | 2 citations | $370 | $370 | Feb 2, 2009 |
| Nov 26, 2008 | Boron | Complaint | no citations | 0 | 0 | Dec 19, 2008 |
| Nov 17, 2008 | Boron | Planned | 4 citations 1 serious | $4,025 | $4,025 | Feb 4, 2009 |
| Nov 5, 2008 | Boron | Planned | 2 citations 1 serious | $7,125 | $7,125 | Feb 2, 2009 |
| Jul 29, 2008 | Lone Pine | Planned | no citations | 0 | 0 | Aug 6, 2008 |
| Jun 3, 2008 | Boron | Complaint | 1 citation | $185 | $185 | Aug 7, 2008 |
Also recorded as: Rio Tinto Minerals; Rio Tinto Minerals (U.S. Borax Inc.); Rio Tinto Minerals (Boron Operation); Rio Tinto Minerals Inc.
The rules this employer was cited under
- 8 CCR 342, Reporting serious injuries and deaths: 2 citations, $10,000
- 8 CCR 3203, Injury and Illness Prevention Program: 2 citations, $1,310
- 8 CCR 3395, Heat illness prevention, outdoor: 2 citations, $785
- 8 CCR 7046: 2 citations, $465
- 8 CCR 3328, Machinery and equipment, general: 2 citations, $410
- 8 CCR 4650: 2 citations, $410
- 8 CCR 3578: 1 citation, 1 serious, $6,750
- 8 CCR 3210, Guardrails at elevated locations: 1 citation, 1 serious, $6,750
Accidents investigated
How to read this record
Each row is one inspection by Cal/OSHA (or, rarely, federal OSHA) of one worksite. Why is the reason it was opened. Proposed is the penalty the inspector assessed; penalty is the current figure after any appeal or settlement. "Serious" means a realistic possibility of death or serious harm; "willful" and "repeat" carry penalties up to $162,851 each.
Citations document that the employer was told, in writing, what the rule required and when. That knowledge is often the center of a retaliation case: a worker who complained about the hazard an inspector later cited, and was then fired or cut, has a Labor Code 6310 claim, with lost wages and attorney's fees.
Full explainer: how to read a Cal/OSHA record.
If you work, or worked, at Rio Tinto Minerals, Inc.
Write down what you reported, to whom and when, and what changed afterward: shifts, pay, duties, write-ups. Request the inspection file from the Cal/OSHA district office using the activity number on the inspection page. An injury goes through workers' compensation; a firing, demotion or threat after a safety complaint or injury report is an employment claim with a one-year deadline at the Labor Commissioner (Labor Code 6310) and a longer one in court. Free, confidential review: (800) 371-3088 or send what you have.
Source: U.S. Department of Labor OSHA enforcement data, California inspections. Record last checked Nov 1, 2026. Back to the safety tracker.
About this data: Records come from the U.S. Department of Labor's OSHA enforcement datasets (inspection, violation, accident and accident injury tables), which carry Cal/OSHA's state-plan inspections alongside federal ones. We load every inspection of a California worksite opened since January 1, 2000 and refresh it weekly. Employer names, addresses and industry codes are as the inspecting office recorded them; similar names are grouped where they clearly refer to the same employer. A citation can be reduced, vacated or withdrawn on appeal, and an inspection can stay open for months, so a record can change. Penalties shown as "current" reflect the latest status in the federal file. This page is public information about the employer's regulatory record, not legal advice and not a statement that any person was harmed or any law broken beyond what the record states.