Mining Incidents

Castle Rock Rock LLC: 142 MSHA citations Metal/Non-Metal

Castle Rock Rock LLC · Surface
Castle Rock, Douglas County, CO  ·  Active
MSHA Mine ID: 0504716

Castle Rock Rock LLC has $66K in proposed MSHA penalties and $12K 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 2001
142
citations
34
significant & substantial
$65,589
proposed penalties
$53,698
paid to date
82% of proposed penalties paid to date, a $11,891 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2001
52
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.
Imminent-danger orders
A Section 107(a) order removes miners from an area when an inspector finds an imminent danger. Each order is lifted once the condition is corrected, so this counts orders issued, not orders now in effect.
1
Section 107(a) orders
Most recent order: 2016-07-05.
On record since 2016.
Source: MSHA imminent-danger order records, updated weekly.

Castle Rock Rock LLC has $66K in proposed MSHA penalties and $12K 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.
$66K
proposed penalties
$66K
current assessed
$54K
paid to date
$12K
outstanding
136 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-10-17.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
Violation severity profile
Shares are computed over citations that carry the MSHA gravity and negligence coding; a small share of records are uncoded.
24.8%
significant & substantial
33.6%
high negligence or reckless
24.8%
reasonably likely or greater
48.9%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 8.0% low, 58.4% moderate, 33.6% high, 0.0% reckless.
Source: MSHA violations gravity and negligence coding, updated weekly.
When citations were contested
Contesting a citation before the Federal Mine Safety and Health Review Commission is a lawful right. These figures state the public outcomes of that process, from MSHA's Contested Violations file.
2 citations taken to the federal commission · 1% of citations on record
  • Settled 2 · 100%
100%
S&S designation survived the contest
Counts a Significant & Substantial citation as surviving when a settlement or judge's decision kept the designation, or the contest was dismissed or defaulted so the citation stands as issued. Vacated and withdrawn citations, and settlements that removed the designation, count against.
of 2 decided S&S contests · industry: 79%
30%
Penalty reduction in decided contests
$2K proposed, $2K after decisions · industry: 39%
Source: MSHA Contested Violations file (public record), updated weekly. A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record. Latest contest filed 2006-05-15.
Health sampling
A sample is a point in time compliance measurement, not an individual exposure history. These figures describe MSHA sampling records and do not establish causation or personal dose.

Metal and nonmetal contaminants (personal samples)
Many samples are screening measurements of substances with no applicable exposure limit; they are counted as samples but excluded from every over-limit figure. Over-limit shares use only limit-tested samples.

Last sampled: 2012-04-05, 14 years ago
5
samples
0
limit-tested
Most sampled contaminants
  • Respirable dust, <.1mg5
Show the individual readings (5)
Date Contaminant Concentration Limit Conc / limit Occupation
2012-04-05 Respirable dust, <.1mg 0 Laborer, Bullgang
2012-04-05 Respirable dust, <.1mg 0 Laborer, Bullgang
2006-06-29 Respirable dust, <.1mg 0 Supervisor, Co. Official
2006-06-29 Respirable dust, <.1mg 0 Utility Man
2006-06-29 Respirable dust, <.1mg 0 Front-end Loader Operator
Source: MSHA respirable dust, quartz, and noise sampling records, updated weekly. Metal/nonmetal contaminant figures come from MSHA's Personal Health Samples and Area Samples files (public record), updated weekly.
Ownership history
  1. Plum Creek Sand & Gravel 2001 to 2002
  2. Douglas County Sand & Gravel 2002 to 2003
  3. Castle Rock Rock Inc 2003 to 2024
  4. Castle Rock Rock LLC 2024 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year Employees
2026 6
2025 5
2024 5
2023 2
2022 3
2021 3
2020 3
2019 3
2018 2
2017 3
2016 4
2015 3
2014 3
2013 3
2012 3
2011 2
2010 2
2009 3
2008 3
2007 4
2006 4
2005 3
2004 3
2003 6
2002 3
2001 1
Source: MSHA quarterly employment and production, updated weekly.

Castle Rock Rock LLC sits in Douglas County, Colorado, where the Census mining category is 0.6% of county employment.

Local economic context
County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Douglas County, Colorado · Population 368,283
0.6%
Mining share of county employment
$145,737
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
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
2026 Q2 3,000 0 0 0.0
2026 Q1 3,000 0 0 0.0
2025 Q4 2,600 3 0 1153.8
2025 Q3 3,000 0 0 0.0
2025 Q2 2,600 0 0 0.0
2024 Q4 4,200 0 0 0.0
2024 Q3 3,250 1 1 307.7
2024 Q2 30 0 0 0.0
Show 82 earlier quarters
Quarter Hours worked Citations S&S Per 1M hrs
2023 Q2 948 0 0 0.0
2022 Q4 480 0 0 0.0
2022 Q3 1,833 0 0 0.0
2022 Q2 2,164 0 0 0.0
2021 Q4 1,360 0 0 0.0
2021 Q3 1,960 1 0 510.2
2021 Q2 1,512 0 0 0.0
2021 Q1 780 0 0 0.0
2020 Q4 1,431 1 0 698.8
2020 Q3 1,461 0 0 0.0
2020 Q2 1,568 2 0 1275.5
2020 Q1 825 0 0 0.0
2019 Q4 790 0 0 0.0
2019 Q3 1,045 1 0 956.9
2019 Q2 1,394 0 0 0.0
2019 Q1 654 0 0 0.0
2018 Q4 560 1 0 1785.7
2018 Q3 1,060 0 0 0.0
2018 Q1 557 0 0 0.0
2017 Q4 1,514 2 1 1321.0
2017 Q3 1,550 1 0 645.2
2017 Q2 1,631 0 0 0.0
2017 Q1 880 0 0 0.0
2016 Q4 1,223 0 0 0.0
2016 Q3 2,050 2 1 975.6
2016 Q2 1,274 0 0 0.0
2016 Q1 856 0 0 0.0
2015 Q4 1,035 0 0 0.0
2015 Q3 1,216 10 5 8223.7
2015 Q2 965 0 0 0.0
2015 Q1 846 0 0 0.0
2014 Q4 878 0 0 0.0
2014 Q3 1,224 4 1 3268.0
2014 Q2 807 0 0 0.0
2014 Q1 710 0 0 0.0
2013 Q4 980 0 0 0.0
2013 Q3 467 0 0 0.0
2013 Q2 1,128 3 0 2659.6
2013 Q1 870 0 0 0.0
2012 Q4 910 0 0 0.0
2012 Q3 1,035 0 0 0.0
2012 Q2 730 4 0 5479.5
2012 Q1 340 9 2 26470.6
2011 Q4 450 0 0 0.0
2011 Q3 546 1 0 1831.5
2011 Q2 824 1 0 1213.6
2011 Q1 300 0 0 0.0
2010 Q4 960 3 1 3125.0
2010 Q3 490 0 0 0.0
2010 Q2 787 0 0 0.0
2010 Q1 500 1 0 2000.0
2009 Q4 600 3 1 5000.0
2009 Q3 1,130 0 0 0.0
2009 Q2 1,464 1 0 683.1
2009 Q1 740 0 0 0.0
2008 Q4 1,776 0 0 0.0
2008 Q3 1,253 0 0 0.0
2008 Q2 859 0 0 0.0
2008 Q1 435 7 2 16092.0
2007 Q4 768 0 0 0.0
2007 Q3 1,440 1 0 694.4
2007 Q2 1,530 0 0 0.0
2007 Q1 940 0 0 0.0
2006 Q4 1,620 5 3 3086.4
2006 Q3 1,590 0 0 0.0
2006 Q2 1,920 3 0 1562.5
2006 Q1 1,840 4 0 2173.9
2005 Q4 1,851 0 0 0.0
2005 Q3 2,400 21 5 8750.0
2005 Q2 1,280 0 0 0.0
2005 Q1 860 0 0 0.0
2004 Q4 700 0 0 0.0
2004 Q1 396 0 0 0.0
2003 Q4 1,721 26 8 15107.5
2003 Q3 1,067 3 0 2811.6
2003 Q2 354 0 0 0.0
2003 Q1 2,439 0 0 0.0
2002 Q4 1,707 4 1 2343.3
2002 Q3 2,353 0 0 0.0
2002 Q2 0 3 0
2001 Q4 680 0 0 0.0
2001 Q3 0 1 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.