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Employers › CA

Mining, Quarrying, Oil & Gas · Placerville, CA

Sierra Rock LLC

According to OSHA enforcement records (2010–2026), Sierra Rock LLC ranks #87,956 of 99,447 penalized U.S. employers by total current penalty, with a mixed safety record: 5 violations across 3 inspections.

Lower half by penalty0% serious
$880
OSHA penalties
5
Violations cited
3
OSHA inspections
#87,956
of 99,447 penalized employers

Sierra Rock LLC in Placerville, CA has been the subject of 3 OSHA workplace inspections and 5 citations since 2010, according to enforcement records from the U.S. Department of Labor. Total penalties assessed: $880. All enforcement data below is sourced from the DOL public enforcement databases at data.dol.gov.

The record in one line

OSHA has inspected Sierra Rock LLC 3 times over 4 years, roughly once every couple of years. These inspections resulted in 5 violations, averaging 1.7 per inspection. According to OSHA enforcement records, its total current penalty ranks #87,956 of 99,447 penalized U.S. employers (the lower half of penalized employers nationally). Against the Mining, Quarrying, Oil & Gas industry average of 2 inspections per employer, this runs moderately above peers (1.3x the sector average) on inspection frequency. For comparison, Hanson Aggregates Mid-Pacific, INC. in San Francisco, CA is another mining, quarrying, oil & gas employer with 2 OSHA inspections on record and $880 in current penalties.

1.7
violations per inspection
0.0%
of violations were serious
#87,956
of 99,447 penalized employers

Compliance score

C 66/100
  • C OSHA safety compliance: 5 violations across 3 OSHA inspections (1.7 per inspection), vs. national p10 0.0 (best) / p90 5.5 (worst) among 145,626 inspected employers.

Channels are separate federal datasets: a dimension marked not applicable simply has no record in that dataset for this employer, not a good or bad score.

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How Sierra Rock LLC compares on OSHA penalties

Total current penalty vs the Mining, Quarrying, Oil & Gas per-employer average

in penalties

What this shows Sierra Rock LLC runs well below peers (0.19x the sector average) in total OSHA penalties.

Source U.S. Department of Labor, OSHA enforcement extracts As of 2026

Where this penalty ranks nationally

Total current OSHA penalty vs every U.S. employer with a nonzero penalty

$880 Top 12% most affordable more affordable than 88% of 99,447 U.S. employers with a penalty

$0–$5,000: 43,959 U.S. employers with a penalty (44%). This entry sits in this band. $5,000–$10,000: 20,304 U.S. employers with a penalty (20%). Above this entry. $10,000–$15,000: 11,027 U.S. employers with a penalty (11%). Above this entry. $15,000–$20,000: 6,546 U.S. employers with a penalty (7%). Above this entry. $20,000–$25,000: 4,175 U.S. employers with a penalty (4%). Above this entry. $25,000–$30,000: 2,877 U.S. employers with a penalty (3%). Above this entry. $30,000–$35,000: 2,036 U.S. employers with a penalty (2%). Above this entry. $35,000–$40,000: 1,493 U.S. employers with a penalty (2%). Above this entry. $40,000–$45,000: 1,095 U.S. employers with a penalty (1%). Above this entry. $45,000–$50,000: 785 U.S. employers with a penalty (1%). Above this entry. $50,000–$55,000: 5,150 U.S. employers with a penalty (5%). Above this entry. This employer $0 $55,000 every penalized U.S. employer, bucketed by value

Each bar is a $5K-wide band; taller bars hold more U.S. employers with a penalty. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Department of Labor, OSHA enforcement extracts · 2026

Does more inspection scrutiny mean more findings?

Each dot is one of 21 Mining, Quarrying, Oil & Gas employers with an OSHA inspection on record, placed by inspections and violations cited. The highlighted dot is Sierra Rock LLC.

Frequently inspected, many findingsRarely inspected, many findingsFrequently inspected, clean recordBelow median on both3.03.033.03.006.312.618.925.2OSHA inspectionsViolations citedCACTUS DRILLING COMP…, OSHA inspections: 3 · Violations cited: 5SCANDRILL INC, OSHA inspections: 3 · Violations cited: 2CALLON PETROLEUM OPE…, OSHA inspections: 3 · Violations cited: 0UNITED DRILLING INC., OSHA inspections: 3 · Violations cited: 14COTERRA ENERGY, INC., OSHA inspections: 3 · Violations cited: 0METRO MATERIALS, INC., OSHA inspections: 3 · Violations cited: 9CONOCO PHILLIPS, OSHA inspections: 3 · Violations cited: 0PERMIAN RESOURCES, OSHA inspections: 3 · Violations cited: 0EXTRACTION OIL & GAS, OSHA inspections: 3 · Violations cited: 0TOTEM WELL SERVICE, OSHA inspections: 3 · Violations cited: 19AREPET INDUSTRIES, LLC, OSHA inspections: 3 · Violations cited: 7HAWAIIAN CEMENT, OSHA inspections: 3 · Violations cited: 2HA INTERNATIONAL LLC, OSHA inspections: 3 · Violations cited: 9HEROD INDUSTRIES INC., OSHA inspections: 3 · Violations cited: 6HALLIBURTON ENERGY S…, OSHA inspections: 3 · Violations cited: 5EDI QUINN ALS, LLC, OSHA inspections: 3 · Violations cited: 3TEXSAND ENERGY RESOU…, OSHA inspections: 3 · Violations cited: 24OIL PATCH GROUP, INC., OSHA inspections: 3 · Violations cited: 7MPLX LP, OSHA inspections: 3 · Violations cited: 0RJ ENERGY, LLC, OSHA inspections: 3 · Violations cited: 0Sierra Rock LLC, OSHA inspections: 3 · Violations cited: 5
Sierra Rock LLC has 3 OSHA inspections on record and 5 violations cited. The crosshair marks the median among these Mining, Quarrying, Oil & Gas peers. Across this sector's tracked employers, more inspections is moderately associated with more violations found -- not a coincidence, but not a guarantee either.

Sierra Rock LLC in the Mining, Quarrying, Oil & Gas enforcement ledger

In Mining, Quarrying, Oil & Gas, Sierra Rock LLC sits at penalty rank #831 of 1,117 penalized establishments ($880 assessed).

How Sierra Rock LLC Compares

Sierra Rock LLC's 1.67 violations per inspection compares to the Mining, Quarrying, Oil & Gas sector average of 3.1 violations per employer.

Against the Mining, Quarrying, Oil & Gas industry average of $4,539 per employer, this employer's current OSHA penalty runs well below peers (0.19x the sector average).

Enforcement detail

OSHA Inspection History

Total Inspections

3

First Inspection

2021-06-25

Last Inspection

2025-08-11

Inspection Span

4 yrs

Violations / Inspection

1.7

Avg Penalty / Inspection

$293

Industry Avg / Inspection

$2,042

What this shows 3 inspections over 4 years, averaging 1.7 violations per visit. That's $293 per inspection vs. the Mining, Quarrying, Oil & Gas average of $2,042.

Enforcement detail

Violation Breakdown

0

Serious

0.0% of total

0

Willful

0.0% of total

0

Repeat

0.0% of total

5

Other-Than-Serious

100.0% of total

What this shows Serious violations involve hazards that could cause death or serious physical harm. Willful violations indicate intentional or knowing disregard of the law. Repeat violations are for hazards previously cited within the past 5 years.

Enforcement detail

Penalty Analysis

Initial Penalty Assessed

$880

Current Penalty Amount

$880

Penalty Reduction

None

What this shows No reduction on record. The current penalty matches the original OSHA assessment.

Industry Safety Context: Mining, Quarrying, Oil & Gas

How Sierra Rock LLC compares to the Mining, Quarrying, Oil & Gas sector, which has 2,294 employers tracked by PlainWorker.

Metric Sierra Rock LLC Industry Avg
Inspections 3 2.2
Violations 5 3.1
Total Penalty $880 $4,539
Avg Penalty per Inspection $293 $2,042
View all 2,294 employers in Mining, Quarrying, Oil & Gas →

Nationwide Mining, Quarrying, Oil & Gas peers with similar penalties or inspection counts

Two OSHA-record peer sets for Sierra Rock LLC, both outside CA so the neighborhoods are not geographic containment.

Similar current OSHA penalty

Nearest same-sector employers by current assessed penalty ($880 here).

Petromark Drilling LLC $867 KS Cudd Pressure Control INC $900 WY Environmental Soil Recovery Limited $840 MI American Rock Products INC $800 WA

Similar OSHA inspection count

Same-sector employers with a comparable inspection history outside this state (3 inspections here).

Cactus Drilling Company, LLC 3 insp. Mentone, TX Scandrill INC 3 insp. Wink, TX Callon Petroleum Operating Company 3 insp. Pecos, TX United Drilling INC. 3 insp. Fort Stockton, TX

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

Showing 5 of 2293 other employers tracked in this sector.

Hanson Aggregates Mid-Pacific, INC.
San Francisco, CA
2 inspections $880
Holliday Trucking, INC.
San Bernardino, CA
3 inspections $885
West Coast Aggregates INC
Los Gatos, CA
3 inspections $890
Petromark Drilling LLC
Galatia, KS
2 inspections $867
Rock Structures Construction Company
Corona, CA
6 inspections $865

Compare Sierra Rock LLC vs Hanson Aggregates Mid-Pacific, INC. side-by-side →

What to do with this record

Use Sierra Rock LLC's enforcement history as one data point, not the whole picture.

  • A single employer's record can look unusual in isolation. Compare Sierra Rock LLC against Hanson Aggregates Mid-Pacific, INC., a similarly-sized employer in the same sector, before drawing conclusions. Compare side-by-side
  • See whether Sierra Rock LLC's inspection and penalty record is typical for Mining, Quarrying, Oil & Gas or an outlier against the sector's own average. View the Mining, Quarrying, Oil & Gas sector
  • Before you accept a job or raise a safety concern, search any employer for its own OSHA inspection history the same way you found this one. Search employers

Figures reflect closed OSHA and WHD federal enforcement actions on record (2010–2026); not every workplace issue results in an inspection or investigation.

Frequently Asked Questions

Is Sierra Rock LLC safe to work at? ▼
Based on OSHA records, Sierra Rock LLC's workplace safety record is mixed, with some compliance concerns. The employer has 5 violations across 3 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 Sierra Rock LLC have? ▼
Sierra Rock LLC has 5 OSHA violations on record, including 0 serious, 0 willful, and 0 repeat violations. The total current penalty amount is $880.
How many OSHA inspections has Sierra Rock LLC had? ▼
Sierra Rock LLC has had 3 OSHA inspections, with the first recorded on 2021-06-25 and the most recent on 2025-08-11. This averages 1.7 violations per inspection.
What is the total penalty amount for Sierra Rock LLC? ▼
Sierra Rock LLC has been assessed $880 in current OSHA penalties.
What industry does Sierra Rock LLC operate in? ▼
Sierra Rock LLC operates in the Mining, Quarrying, Oil & Gas sector (NAICS code 212319). This industry has 2,294 employers tracked by PlainWorker, with 5,098 total OSHA inspections and $10.41M in cumulative penalties.
Where does Sierra Rock LLC rank nationally on OSHA penalties? ▼
Among the 99,447 U.S. employers with a nonzero current OSHA penalty in PlainWorker's corpus, Sierra Rock LLC ranks #87,956 (the lower half of penalized employers nationally). The ordinal is a live COUNT of employers with a lower total_current_penalty; see the methodology page for the exact derivation.
How does Sierra Rock LLC's safety record compare to industry average? ▼
Sierra Rock LLC's total OSHA penalty of $880 is below the Mining, Quarrying, Oil & Gas industry average of $4,539 per employer. The employer has 3 inspections compared to the industry average of 2.2 per employer. For a direct comparison, Hanson Aggregates Mid-Pacific, INC. in San Francisco, CA is a similar mining, quarrying, oil & gas employer with $880 in current penalties.
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.

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Every figure on PlainWorker is rendered directly from official U.S. Department of Labor OSHA and Wage & Hour Division enforcement records, no number is typed in by an editor. This employer's ratios (penalty-per-violation, industry comparisons) are computed live from the 3 inspections on record. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026.