Mining, Quarrying, Oil & Gas · Mariposa, CA

Mariposa - Yosemite Slate Quarry

According to OSHA enforcement records (2010–2026), Mariposa - Yosemite Slate Quarry has a relatively clean safety record: 0 violations across 4 inspections. See the full breakdown below.

Compiled byPlainworker Editorial, Workplace Safety Editorial Team · July 8, 2026

$0
OSHA penalties: 0
Violations cited: 4
OSHA inspections

Mariposa - Yosemite Slate Quarry in Mariposa, CA has been the subject of 4 OSHA workplace inspections and 0 citations since 2010, according to enforcement records from the U.S. Department of Labor. All enforcement data below is sourced from the DOL public enforcement databases at data.dol.gov.

The record in one line

OSHA has inspected Mariposa - Yosemite Slate Quarry 4 times across a longer 11-year span, an infrequent cadence. None of these inspections resulted in a citation. Against the Mining, Quarrying, Oil & Gas industry average of 2 inspections per employer, this runs moderately above peers (1.9x the sector average) on inspection frequency. For comparison, Chevron U.S.a. INC. in Bakersfield, CA is another mining, quarrying, oil & gas employer with 5 OSHA inspections on record and $0 in current penalties.

0.0
violations per inspection: 0.0%
of violations were serious

What the Data Says About Mariposa - Yosemite Slate Quarry

The federal enforcement record for Mariposa - Yosemite Slate Quarry in Mariposa, CA shows 4 OSHA inspections with zero violations cited, a cleaner record than the Mining, Quarrying, Oil & Gas sector average of 3.1 violations per employer.

No OSHA penalty has been assessed against Mariposa - Yosemite Slate Quarry to date. The Mining, Quarrying, Oil & Gas sector average runs $4,394 per employer.

Inspection activity spans from 2015-04-28 to 2026-04-29, a window of roughly 11 years.

Total Inspections

First Inspection

2015-04-28

Last Inspection

2026-04-29

Inspection Span

11 yrs

Violations / Inspection

0.0

Avg Penalty / Inspection

Industry Avg / Inspection

$2,034

What this shows 4 inspections over 11 years, averaging 0.0 violations per visit. That's $0 per inspection vs. the Mining, Quarrying, Oil & Gas average of $2,034.

Industry Safety Context: Mining, Quarrying, Oil & Gas

How Mariposa - Yosemite Slate Quarry compares to the Mining, Quarrying, Oil & Gas sector, which has 2,359 employers tracked by PlainWorker.

Metric	Mariposa - Yosemite Slate Quarry	Industry Avg
Inspections	4	2.2
Violations	0	3.1
Total Penalty	$0	$4,394
Avg Penalty per Inspection	$0	$2,034

View all 2,359 employers in Mining, Quarrying, Oil & Gas →

Nearby & Similar Employers in Mining, Quarrying, Oil & Gas

Abraxas Petroleum CORP

Pyote, TX

2 inspections $0

Whiting Petroleum Corporation

Compare Mariposa - Yosemite Slate Quarry vs Chevron U.S.a. INC. side-by-side →

Frequently Asked Questions

Is Mariposa - Yosemite Slate Quarry safe to work at? ▼

Based on OSHA records, Mariposa - Yosemite Slate Quarry's workplace safety record is relatively clean, with fewer violations than typical. The employer has 0 violations across 4 inspections. Compared to Mining, Quarrying, Oil & Gas industry peers, this is below average for penalties. Review the full inspection history below for details.

How many OSHA violations does Mariposa - Yosemite Slate Quarry have? ▼

Mariposa - Yosemite Slate Quarry has 0 OSHA violations on record, including 0 serious, 0 willful, and 0 repeat violations. The total current penalty amount is $0.

How many OSHA inspections has Mariposa - Yosemite Slate Quarry had? ▼

Mariposa - Yosemite Slate Quarry has had 4 OSHA inspections, with the first recorded on 2015-04-28 and the most recent on 2026-04-29. This averages 0.0 violations per inspection.

What is the total penalty amount for Mariposa - Yosemite Slate Quarry? ▼

Mariposa - Yosemite Slate Quarry has been assessed $0 in current OSHA penalties.

What industry does Mariposa - Yosemite Slate Quarry operate in? ▼

Mariposa - Yosemite Slate Quarry operates in the Mining, Quarrying, Oil & Gas sector (NAICS code 212311). This industry has 2,359 employers tracked by PlainWorker, with 5,096 total OSHA inspections and $10.36M in cumulative penalties.

How does Mariposa - Yosemite Slate Quarry's safety record compare to industry average? ▼

Mariposa - Yosemite Slate Quarry's total OSHA penalty of $0 is below the Mining, Quarrying, Oil & Gas industry average of $4,394 per employer. The employer has 4 inspections compared to the industry average of 2.2 per employer. For a direct comparison, Chevron U.S.a. INC. in Bakersfield, CA is a similar mining, quarrying, oil & gas employer with $0 in current penalties.

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Mining, Quarrying, Oil & Gas Industry

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What to check next

Mariposa - Yosemite Slate Quarry's record is one establishment in a larger pattern. Use it as a research checklist, not a verdict on the employer overall.

See how Mariposa - Yosemite Slate Quarry compares to the 2,359 other employers in Mining, Quarrying, Oil & Gas. Mining, Quarrying, Oil & Gas record
Put this employer head-to-head with another on inspections, penalties, and back wages. Compare employers
Review the full OSHA & wage-enforcement picture for CA. CA state record

These figures are the federal enforcement record on file and reflect past inspections, not a statement about current workplace conditions. See the disclaimer for how to read them.

Data Sources & Methodology ▼

Data as of 2026. Source: U.S. Department of Labor (OSHA, WHD).

Source: OSHA Enforcement Data

Inspection and violation records from the Occupational Safety and Health Administration (OSHA), U.S. Department of Labor, covering the period 2010–2026. Includes inspection dates, violation types (serious, willful, repeat, other-than-serious), and penalty amounts. Penalties shown are current assessed amounts and may differ from original citations due to settlement, contest, or reduction.

Source: Wage and Hour Division (WHD)

Compliance actions from the WHD, covering enforcement of the Fair Labor Standards Act (FLSA), including minimum wage, overtime, and child labor violations. Back wages represent amounts owed to affected employees as determined by WHD investigations.

Employer Matching

Employers are matched across OSHA and WHD datasets by name, state, and city. Employers included in PlainWorker have 2 or more OSHA inspections or $1,000+ in WHD back wages. Data is updated monthly from data.dol.gov.