Mining Incidents

Round Mountain Rock Metal/Non-Metal

Round Mountain Rock · Surface
Westwood, Lassen County, CA  ·  Intermittent
MSHA Mine ID: 0405571

Round Mountain Rock has $16K in proposed MSHA penalties and $0 outstanding across 0 contested dockets, plus health sampling and the full incident record.

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Fatalities
0
Total incidents
0
Years on record
Latest incident
Compliance record
MSHA citations since 2004
83
citations
16
significant & substantial
$16,009
proposed penalties
$16,009
paid to date
100% of proposed penalties paid to date, a $0 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2004
28
inspections on record
406
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: 406 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.

Round Mountain Rock has $16K 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.
$16K
proposed penalties
$16K
current assessed
$16K
paid to date
$0
outstanding
81 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2023-11-30.
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 1,919 0 0 0.0
2025 Q3 1,238 0 0 0.0
2025 Q2 794 0 0 0.0
2025 Q1 0 0 0
2024 Q4 775 0 0 0.0
2024 Q3 1,234 0 0 0.0
2024 Q2 815 0 0 0.0
2024 Q1 0 0 0
Show 68 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 915 4 0 4371.6
2023 Q3 654 19 4 29052.0
2023 Q1 0 0 0
2022 Q4 389 0 0 0.0
2022 Q3 1,337 0 0 0.0
2022 Q2 800 0 0 0.0
2022 Q1 0 0 0
2021 Q4 1,424 0 0 0.0
2021 Q3 838 0 0 0.0
2021 Q2 296 0 0 0.0
2021 Q1 0 0 0
2020 Q4 1,093 0 0 0.0
2020 Q3 1,731 1 1 577.7
2020 Q2 100 0 0 0.0
2020 Q1 0 0 0
2019 Q4 406 0 0 0.0
2019 Q3 1,028 0 0 0.0
2019 Q2 735 0 0 0.0
2019 Q1 0 0 0
2018 Q4 1,290 1 0 775.2
2018 Q3 1,833 0 0 0.0
2018 Q2 1,092 0 0 0.0
2018 Q1 0 0 0
2017 Q4 930 4 0 4301.1
2017 Q3 2,037 0 0 0.0
2017 Q2 1,470 0 0 0.0
2017 Q1 0 0 0
2016 Q3 1,229 0 0 0.0
2016 Q2 892 0 0 0.0
2016 Q1 0 0 0
2015 Q4 735 1 0 1360.5
2015 Q3 967 5 1 5170.6
2015 Q2 156 0 0 0.0
2015 Q1 20 0 0 0.0
2014 Q4 422 0 0 0.0
2014 Q3 830 3 0 3614.5
2014 Q2 1,032 0 0 0.0
2014 Q1 39 0 0 0.0
2013 Q4 591 0 0 0.0
2013 Q3 1,182 0 0 0.0
2013 Q2 677 0 0 0.0
2010 Q3 911 0 0 0.0
2010 Q2 200 0 0 0.0
2010 Q1 0 0 0
2009 Q4 0 0 0
2009 Q3 0 0 0
2009 Q2 120 0 0 0.0
2009 Q1 480 0 0 0.0
2008 Q4 2,264 5 0 2208.5
2008 Q3 5,258 0 0 0.0
2008 Q2 4,445 0 0 0.0
2008 Q1 640 0 0 0.0
2007 Q4 5,988 4 1 668.0
2007 Q3 3,695 3 0 811.9
2007 Q2 5,990 0 0 0.0
2007 Q1 763 0 0 0.0
2006 Q4 2,951 0 0 0.0
2006 Q3 4,794 6 1 1251.6
2006 Q2 2,567 0 0 0.0
2006 Q1 610 0 0 0.0
2005 Q4 1,906 0 0 0.0
2005 Q3 5,247 11 3 2096.4
2005 Q2 2,377 0 0 0.0
2005 Q1 670 0 0 0.0
2004 Q4 2,114 0 0 0.0
2004 Q3 3,881 11 5 2834.3
2004 Q2 3,255 2 0 614.4
2003 Q4 2,435 0 0 0.0

No reportable incidents on file.

MSHA has no recorded reportable accidents for this mine in the current dataset. New reports appear here within a week of being filed.

For insurers, brokers, and safety consultants

The full compliance file on Round Mountain Rock

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.