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Ridge Rock Quarry Metal/Non-Metal

Controlled by Jeff Hansen
North San Juan, Nevada County, CA  ·  Active
MSHA Mine ID: 0405178

Ridge Rock Quarry has $11K 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
1
Years on record
2023
Latest incident
Feb 2023
Compliance record
MSHA citations since 2000
89
citations
9
significant & substantial
$11,197
proposed penalties
$11,197
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
56
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.

Ridge Rock Quarry has $11K 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.
$11K
proposed penalties
$11K
current assessed
$11K
paid to date
$0
outstanding
89 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2025-10-28.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also the operator's enforcement record
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 2,094 1 0 477.6
2025 Q3 4,088 0 0 0.0
2025 Q2 3,072 1 0 325.5
2025 Q1 2,087 0 0 0.0
2024 Q4 1,797 0 0 0.0
2024 Q3 1,800 2 0 1111.1
2024 Q2 2,446 0 0 0.0
2024 Q1 2,458 2 0 813.7
Show 92 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q4 2,646 0 0 0.0
2023 Q3 2,086 1 0 479.4
2023 Q2 2,905 0 0 0.0
2023 Q1 2,034 0 0 0.0
2022 Q4 1,900 2 0 1052.6
2022 Q3 2,109 0 0 0.0
2022 Q2 2,081 0 0 0.0
2022 Q1 2,643 0 0 0.0
2021 Q4 2,043 0 0 0.0
2021 Q3 2,294 0 0 0.0
2021 Q2 3,095 2 0 646.2
2021 Q1 2,072 0 0 0.0
2020 Q3 1,251 0 0 0.0
2020 Q1 772 0 0 0.0
2019 Q4 889 0 0 0.0
2019 Q2 885 0 0 0.0
2019 Q1 704 3 0 4261.4
2018 Q4 970 0 0 0.0
2018 Q3 1,015 0 0 0.0
2018 Q2 851 0 0 0.0
2018 Q1 869 0 0 0.0
2017 Q4 990 0 0 0.0
2017 Q3 887 0 0 0.0
2017 Q2 906 2 0 2207.5
2017 Q1 874 0 0 0.0
2016 Q4 993 6 0 6042.3
2016 Q3 1,082 0 0 0.0
2016 Q2 1,116 0 0 0.0
2016 Q1 1,242 0 0 0.0
2015 Q4 1,283 2 0 1558.8
2015 Q3 923 4 0 4333.7
2015 Q2 918 0 0 0.0
2015 Q1 893 0 0 0.0
2014 Q4 1,153 1 0 867.3
2014 Q3 1,827 0 0 0.0
2014 Q2 1,297 0 0 0.0
2014 Q1 1,162 1 0 860.6
2013 Q4 1,403 0 0 0.0
2013 Q3 1,592 0 0 0.0
2013 Q2 1,701 0 0 0.0
2013 Q1 1,800 5 0 2777.8
2012 Q4 1,810 0 0 0.0
2012 Q3 1,588 2 0 1259.4
2012 Q2 1,148 0 0 0.0
2012 Q1 1,182 0 0 0.0
2011 Q4 1,635 0 0 0.0
2011 Q3 810 0 0 0.0
2011 Q1 1,072 2 0 1865.7
2010 Q4 1,851 1 0 540.2
2010 Q3 1,142 2 1 1751.3
2010 Q2 957 0 0 0.0
2010 Q1 726 0 0 0.0
2009 Q4 1,114 5 2 4488.3
2009 Q3 1,535 0 0 0.0
2009 Q2 1,168 1 0 856.2
2009 Q1 650 7 1 10769.2
2008 Q4 1,759 0 0 0.0
2008 Q3 2,121 0 0 0.0
2008 Q2 1,885 1 0 530.5
2008 Q1 2,161 0 0 0.0
2007 Q4 2,008 2 0 996.0
2007 Q3 2,583 0 0 0.0
2007 Q2 1,853 1 0 539.7
2007 Q1 2,016 0 0 0.0
2006 Q4 2,016 1 0 496.0
2006 Q3 2,516 0 0 0.0
2006 Q2 2,520 0 0 0.0
2006 Q1 2,016 0 0 0.0
2005 Q4 2,016 0 0 0.0
2005 Q3 2,768 0 0 0.0
2005 Q2 1,512 2 0 1322.8
2005 Q1 1,512 0 0 0.0
2004 Q4 2,016 0 0 0.0
2004 Q3 2,016 0 0 0.0
2004 Q2 1,818 0 0 0.0
2004 Q1 1,818 0 0 0.0
2003 Q4 1,768 2 0 1131.2
2003 Q3 1,920 0 0 0.0
2003 Q2 1,920 0 0 0.0
2003 Q1 1,920 0 0 0.0
2002 Q4 2,076 0 0 0.0
2002 Q3 1,920 0 0 0.0
2002 Q2 1,920 2 0 1041.7
2002 Q1 1,920 0 0 0.0
2001 Q4 2,520 2 0 793.7
2001 Q3 2,520 3 0 1190.5
2001 Q2 1,920 0 0 0.0
2001 Q1 1,644 0 0 0.0
2000 Q4 2,520 0 0 0.0
2000 Q3 2,304 0 0 0.0
2000 Q2 2,304 17 5 7378.5
2000 Q1 1,800 0 0 0.0
No fatalities recorded at this mine.

Reportable incidents

1 on file

2023 · 1 incident

February 20, 2023 CA · Metal/Non-Metal maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech SLIP OR FALL OF PERSON
Hansen Bros. Enterprises · Fall from machine

Climbing onto loader to work on the engine. Slipped and fell onto left shoulder & left chest.

For insurers, brokers, and safety consultants

The full compliance file on Ridge Rock 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.

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