Mining Incidents

Langley Hill Quarry Metal/Non-Metal

Langley Hill Quarry · Surface
WOODSIDE, San Mateo County, CA  ·  Active
MSHA Mine ID: 0400170

Langley Hill Quarry has $10K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
1
Total incidents
1
Years on record
1998
Latest incident
Mar 1998
Compliance record
MSHA citations since 2000
84
citations
21
significant & substantial
$9,855
proposed penalties
$9,855
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2000
64
inspections on record
713
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: 713 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Langley Hill Quarry has $10K in proposed MSHA penalties and $0 outstanding across 0 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.
$10K
proposed penalties
$10K
current assessed
$10K
paid to date
$0
outstanding
83 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-10-29.
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 1,224 2 0 1634.0
2025 Q3 1,154 0 0 0.0
2025 Q2 1,252 0 0 0.0
2025 Q1 1,084 3 0 2767.5
2024 Q4 1,116 0 0 0.0
2024 Q3 1,060 0 0 0.0
2024 Q2 1,280 0 0 0.0
2023 Q4 1,234 0 0 0.0
Show 95 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q3 1,240 2 0 1612.9
2023 Q2 1,152 0 0 0.0
2023 Q1 1,040 1 0 961.5
2022 Q4 1,112 0 0 0.0
2022 Q3 1,044 0 0 0.0
2022 Q2 1,304 0 0 0.0
2022 Q1 1,136 0 0 0.0
2021 Q4 1,152 0 0 0.0
2021 Q3 1,188 0 0 0.0
2021 Q2 1,380 0 0 0.0
2021 Q1 1,220 0 0 0.0
2020 Q4 1,144 0 0 0.0
2020 Q3 1,684 1 0 593.8
2020 Q2 1,680 0 0 0.0
2020 Q1 1,556 0 0 0.0
2019 Q4 1,277 1 0 783.1
2019 Q3 1,748 0 0 0.0
2019 Q2 1,792 0 0 0.0
2019 Q1 1,680 2 1 1190.5
2018 Q4 1,626 0 0 0.0
2018 Q3 1,696 0 0 0.0
2018 Q2 1,820 0 0 0.0
2018 Q1 1,761 2 0 1135.7
2017 Q4 1,708 0 0 0.0
2017 Q3 1,800 0 0 0.0
2017 Q2 1,796 1 0 556.8
2017 Q1 1,697 6 2 3535.7
2016 Q4 1,432 0 0 0.0
2016 Q3 1,680 0 0 0.0
2016 Q2 1,700 2 0 1176.5
2016 Q1 1,792 0 0 0.0
2015 Q4 1,652 0 0 0.0
2015 Q3 1,764 0 0 0.0
2015 Q2 1,638 0 0 0.0
2015 Q1 1,728 0 0 0.0
2014 Q4 1,596 0 0 0.0
2014 Q3 1,752 1 0 570.8
2014 Q2 1,752 0 0 0.0
2014 Q1 1,688 1 0 592.4
2013 Q4 1,632 0 0 0.0
2013 Q3 1,688 1 0 592.4
2013 Q2 1,484 0 0 0.0
2013 Q1 1,432 2 0 1396.6
2012 Q4 1,232 0 0 0.0
2012 Q3 1,488 5 2 3360.2
2012 Q2 1,640 0 0 0.0
2012 Q1 1,600 0 0 0.0
2011 Q4 1,472 4 0 2717.4
2011 Q3 1,650 0 0 0.0
2011 Q2 1,624 1 0 615.8
2011 Q1 1,646 3 1 1822.6
2010 Q4 1,482 0 0 0.0
2010 Q3 1,680 0 0 0.0
2010 Q2 1,680 3 1 1785.7
2010 Q1 1,646 0 0 0.0
2009 Q4 1,400 2 1 1428.6
2009 Q3 1,680 0 0 0.0
2009 Q2 1,680 0 0 0.0
2009 Q1 1,606 1 0 622.7
2008 Q4 1,300 4 1 3076.9
2008 Q3 1,680 0 0 0.0
2008 Q2 1,654 1 0 604.6
2008 Q1 1,680 0 0 0.0
2007 Q4 1,280 0 0 0.0
2007 Q3 1,680 1 0 595.2
2007 Q2 1,680 0 0 0.0
2007 Q1 1,680 0 0 0.0
2006 Q4 1,540 1 0 649.4
2006 Q3 1,632 0 0 0.0
2006 Q2 1,616 1 0 618.8
2006 Q1 1,680 6 2 3571.4
2005 Q4 1,484 0 0 0.0
2005 Q3 1,680 0 0 0.0
2005 Q2 1,680 1 0 595.2
2005 Q1 1,680 0 0 0.0
2004 Q4 1,400 0 0 0.0
2004 Q3 1,400 0 0 0.0
2004 Q2 1,680 1 0 595.2
2004 Q1 1,680 0 0 0.0
2003 Q4 1,400 0 0 0.0
2003 Q3 1,620 0 0 0.0
2003 Q2 1,680 0 0 0.0
2003 Q1 1,680 6 1 3571.4
2002 Q4 1,400 8 7 5714.3
2002 Q3 1,680 2 0 1190.5
2002 Q2 1,680 0 0 0.0
2002 Q1 1,680 3 1 1785.7
2001 Q4 1,400 0 0 0.0
2001 Q3 1,680 0 0 0.0
2001 Q2 1,680 0 0 0.0
2001 Q1 1,680 0 0 0.0
2000 Q4 2,100 0 0 0.0
2000 Q3 1,620 1 1 617.3
2000 Q2 1,520 0 0 0.0
2000 Q1 1,620 0 0 0.0

Fatalities at this mine

1 recorded
March 12, 1998 CA · Metal/Non-Metal haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver Fatality · SLIP OR FALL OF PERSON
Langley Hill Quarry · Fall from machine

SELF-EMPLOYED TRUCK DRIVER WAS STANDING A SCALE. I OBSERVED HIM STANDING THEN LOOKED AWAY ABOUT 20 SECS LATER I LOOKED BACK AND HE WAS FACE DOWN LYING ON SCALE. NO SIGNS OF WHAT HAPPENED TO HI M OR WHAT CAUSED HIM TO FALL. LOADER OPERATOR SAID HE APPEARED PALE WHEN HE LOADED HIM EARLIER.

For insurers, brokers, and safety consultants

The full compliance file on Langley Hill Quarry

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.