Rockton Rock Quarry has $24K in proposed MSHA penalties and $151 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
2009
Latest incident
Aug 2009
Compliance record
MSHA citations since 2001
116
citations
11
significant & substantial
$23,523
proposed penalties
$23,372
paid to date
99% of proposed penalties paid to date, a $151 gap.
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: 660 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: 2021-08-24.
On record since 2021.
Source: MSHA imminent-danger order records, updated weekly.
Rockton Rock Quarry has $24K in proposed MSHA penalties and $151 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.
$24K
proposed penalties
$24K
current assessed
$23K
paid to date
$151
outstanding
112 assessments are final orders; 1 contested dockets.
Of $363 in penalties contested before the Commission, $363 was upheld in final decisions.
As of the most recent assessment on 2026-06-02.
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.
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.
3citations taken to the federal commission · 3% of citations on record
Settled
3 · 100%
0%
Penalty reduction in decided contests
$363 proposed, $363 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 2019-11-10.
Contested penalties
ⓘA reduction or dismissal at the Commission is a lawful outcome of contesting a proposed penalty. Figures are the proposed amount and the amount upheld in the docket's decision.
Largest penalties this mine contested before the Federal Mine Safety and Health Review Commission, with the outcome on record.
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: 2026-06-03
0%
of limit-tested samples over the exposure limit
6
samples
1
limit-tested
Most sampled contaminants
Respirable dust, <.1mg4
Quartz, respirable, >1% Qtz1
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (6)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-06-03
Respirable dust, <.1mg
0
Front-end Loader Operator
2026-06-03
Respirable dust, <.1mg
0
Front-end Loader Operator
2021-04-28
Unlisted Particulate, respirable, <1% Qtz
0.22
Drill Operator, Rotary
2011-10-12
Respirable dust, <.1mg
0
Crusher Oper/Worker
2004-10-19
Respirable dust, <.1mg
0
Crusher Oper/Worker
2004-10-19
Quartz, respirable, >1% Qtz
1.25
1.95
0.64
Crusher Oper/Worker
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
6
2025
5
2024
4
2023
6
2022
6
2021
6
2020
7
2019
7
2018
7
2017
2
2016
2
2015
3
2014
2
2013
1
2012
2
2011
2
2010
1
2009
3
2008
3
2007
3
2006
3
2005
3
2004
2
2003
2
2002
2
2001
1
2000
2
Source: MSHA quarterly employment and production, updated weekly.
Rockton Rock Quarry sits in Winnebago County, Illinois, where the Census mining category is 0.0% 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.
Winnebago County, Illinois · Population 283,289
0.0%
Mining share of county employment
$64,363
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
Weather was clear. EE was getting out of 1845 skidloader & twisted his ankle on bucket. Co-worker was standing on a screen catwalk, noticed EE limping & not in control of his balance. Thru hand gestures EE indicated he'd twisted his ankle. Co-worker went to help him after finishing his task. EE said he twisted his foot & was dizzy trying to gain his footing.