Mining Incidents

Acton Clay Quarries Metal/Non-Metal

Acton, Los Angeles County, CA  ·  Active
MSHA Mine ID: 0405169

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Fatalities
0
Total incidents
6
Years on record
2000–2026
Latest incident
Feb 2026
Compliance record
MSHA citations since 2000
99
citations
19
significant & substantial
$18,373
proposed penalties
$11,614
paid to date
Source: MSHA violations data, updated weekly.
Quarterly safety rates
Citations per million employee-hours, as reported to MSHA
Quarter Hours worked Citations S&S Per 1M hrs
2025 Q4 4,212 3 1 712.3
2025 Q3 3,832 0 0 0.0
2025 Q2 3,887 0 0 0.0
2025 Q1 3,726 0 0 0.0
2024 Q4 4,404 1 0 227.1
2024 Q3 4,231 1 1 236.4
2024 Q2 4,530 0 0 0.0
2024 Q1 3,912 0 0 0.0
Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.
No fatalities recorded at this mine.

Reportable incidents

6 on file

2026 · 1 incident

February 10, 2026 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
North Star Minerals Inc · Fall from machine

Employee slipped off conveyor tail pulley

2024 · 1 incident

December 3, 2024 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer SLIP OR FALL OF PERSON
North Star Minerals Inc · Fall from ladders

Was standing on a step ladder refueling a Dozer. With both feet on the last rung of the ladder, EE went to stepping off with left leg. EE's boot got stuck on the ladder and EE lost balance causing EE to fall. EE fell backwards and struck an oil container then landed on left side on the floor.

2022 · 1 incident

June 3, 2022 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver POWERED HAULAGE
North Star Minerals Inc · Struck against a moving object

Driver error resulting in driver crashing into road berm to stop the Big Rig.

2002 · 1 incident

April 8, 2002 CA · Metal/Non-Metal welder (shop) MACHINERY
North Star Minerals Inc · Over-exertion (Not Elsewhere Classified)

EE REPORTED THE NEXT DAY SHOULDER WAS HURTING AND WILL NOT BE COMING TO WORK. EE STATES RIGHT SHOULDER BEGAN HURTING PROGRESSIVELY MORE TO THEEND OF SHIFT. HE DOES NOT KNOW WHAT CAUSED IT.

2001 · 1 incident

January 30, 2001 CA · Metal/Non-Metal bulldozer operator, universal operator, heavy equipment operator, operating engineer POWERED HAULAGE
North Star Minerals Inc · Struck against a moving object

ON MONDAY, WE RECEIVE NOTIFICATION FROM EE'S HOUSEHOLD THAT EE WOULD NOT BE IN TO WORK BECAUSE HE HAD INJURED HIS BACK. LATER IN A T/C HE SAID HE HAD HURT HIS BACK THE PRIOR TUESDAY MOVING CUT TING EDGES WITH A LOADER. HOSPITAL T/C TODAY SAID DIAGNOSIS IS BACK SPRAIN, AND THEY ANTICIPATE HIS RETURN TO DUTY IN A WEEK.

2000 · 1 incident

August 9, 2000 CA · Metal/Non-Metal warehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operator HANDTOOLS (NONPOWERED)
North Star Minerals Inc · Fall from machine

EMPLOYEE SUFFERED BRUISES, AND CUT HIS HEAD REQUIRING STITCHES. THISHAPPENED WHEN HIS HAMMER SLIPPED WHILE HE WAS GETTING SOME METALLIC OBSTRUCITON OUT OF A CRUSHER WHILE THE PLANT WAS SHUT D OWN, HE LOST HIS BALANCE AND FELL OFF THE CRUSHER PLATFORM.