Mining Incidents

Coast Aggregates Big Rock Creek Metal/Non-Metal

Coast Aggregates · Surface
Pearblossom, Los Angeles County, CA  ·  Active
MSHA Mine ID: 0405908

Coast Aggregates Big Rock Creek has $193K in proposed MSHA penalties and $0 outstanding across 1 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
6
Years on record
2018–2024
Latest incident
May 2024
Compliance record
MSHA citations since 2016
150
citations
58
significant & substantial
$193,340
proposed penalties
$187,407
paid to date
97% of proposed penalties paid to date, a $5,933 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2016
35
inspections on record
670
inspection hours
n/a
citations per 100 inspection hours
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.
Rate withheld: 670 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Coast Aggregates Big Rock Creek has $193K in proposed MSHA penalties and $0 outstanding across 1 contested dockets.

Penalty disposition
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.
$193K
proposed penalties
$187K
current assessed
$187K
paid to date
$0
outstanding
146 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2026-04-22.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Quarterly safety rates
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2025 Q4 21,435 0 0 0.0
2025 Q3 18,188 1 0 55.0
2025 Q2 21,310 3 0 140.8
2025 Q1 20,064 0 0 0.0
2024 Q4 20,099 9 1 447.8
2024 Q3 13,315 0 0 0.0
2024 Q2 17,460 5 0 286.4
2024 Q1 15,722 0 0 0.0
Show 31 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 16,231 12 4 739.3
2023 Q3 11,485 15 6 1306.1
2023 Q2 16,131 0 0 0.0
2023 Q1 14,914 4 1 268.2
2022 Q4 16,071 0 0 0.0
2022 Q3 17,283 3 1 173.6
2022 Q2 15,087 0 0 0.0
2022 Q1 13,932 11 3 789.5
2021 Q4 16,393 0 0 0.0
2021 Q3 17,383 16 8 920.4
2021 Q2 15,935 7 2 439.3
2021 Q1 17,495 16 9 914.5
2020 Q4 18,550 0 0 0.0
2020 Q3 19,009 0 0 0.0
2020 Q2 16,132 5 2 309.9
2020 Q1 16,311 9 6 551.8
2019 Q4 19,079 0 0 0.0
2019 Q3 16,738 0 0 0.0
2019 Q2 18,154 5 2 275.4
2019 Q1 14,356 7 2 487.6
2018 Q4 13,200 0 0 0.0
2018 Q3 13,217 0 0 0.0
2018 Q2 10,268 4 1 389.6
2018 Q1 15,173 0 0 0.0
2017 Q4 13,544 5 4 369.2
2017 Q3 12,478 0 0 0.0
2017 Q2 11,569 0 0 0.0
2017 Q1 8,948 0 0 0.0
2016 Q4 6,774 3 1 442.9
2016 Q3 6,106 0 0 0.0
2016 Q2 5,216 2 1 383.4
No fatalities recorded at this mine.

Reportable incidents

6 on file

2024 · 1 incident

May 10, 2024 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech HANDLING OF MATERIALS
Coast Aggregates · Struck by rolling or sliding object

While employee was moving a piece of steel and putting on the ground the metal ladder rolled back striking employee's shin. Employee sought no medical attention due to employee saying employee would be OK.

2023 · 1 incident

April 5, 2023 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator SLIP OR FALL OF PERSON
Coast Aggregates · Fall to the walkway or working surface

While pulling on a 30 mil. liner for new ponds being built, the strap broke free and individual fell to the ground. Miner in a lot of pain stating lower back hurt .

2022 · 1 incident

July 21, 2022 CA · Metal/Non-Metal laborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitman DISORDERS (PHYSICAL AGENTS)
Coast Aggregates · Contact with heat

Employee felt weak, employee told co-workers employee was on a diet & failed to eat lunch and drink water.

2021 · 1 incident

June 21, 2021 CA · Metal/Non-Metal welder (non-shop) MACHINERY
Coast Aggregates · Struck by flying object

Individual was standing nearby when another employee was grinding

2019 · 1 incident

October 22, 2019 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech POWERED HAULAGE
Coast Aggregates · Caught in, under or between running or meshing objects

The employee went beyond a roller guard that was put there to prevent anyone from reaching the roller. They should not have done that.

2018 · 1 incident

January 31, 2018 CA · Metal/Non-Metal utility man, shift tech, service/dump truck operator HANDLING OF MATERIALS
Coast Aggregates · Struck by rolling or sliding object

While removing back plate covering screen, after taking nuts and washers off we did not know that the bolts were not welded on inside of screen. The weight of the plate caused the bolts to angle downward and the plate to slide off bolts smashing employee's left hand.

For insurers, brokers, and safety consultants

The full compliance file on Coast Aggregates Big Rock Creek

A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.