Stone Wholesale Brownstone Quarry has $38K in proposed MSHA penalties and $1K outstanding across 0 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
1
Years on record
2021
Latest incident
Jun 2021
Compliance record
MSHA citations since 2009
134
citations
28
significant & substantial
$37,815
proposed penalties
$36,381
paid to date
96% of proposed penalties paid to date, a $1,434 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: 610 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Stone Wholesale Brownstone Quarry has $38K in proposed MSHA penalties and $1K 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.
$38K
proposed penalties
$38K
current assessed
$36K
paid to date
$1K
outstanding
129 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-06-25.
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.
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: 2024-03-05
13%
of limit-tested samples over the exposure limit
14
samples
8
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz81 over
Respirable dust, <.1mg6
Show the individual readings (14)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2022-01-13
Quartz, respirable, >1% Qtz
0.22
0.22
1.00
Cutting Mach Operator
2024-03-05
Respirable dust, <.1mg
0
Cutting Mach Helper
2024-03-05
Respirable dust, <.1mg
0
Laborer, Bullgang
2024-03-05
Respirable dust, <.1mg
0
Cutting Mach Operator
2024-03-05
Quartz, respirable, >1% Qtz
0.19
0.35
0.54
Cutting Mach Operator
2022-01-13
Respirable dust, <.1mg
0
Cutting Mach Operator
2022-01-13
Quartz, respirable, >1% Qtz
0.14
0.29
0.48
Cutting Mach Operator
2022-01-13
Quartz, respirable, >1% Qtz
0.18
0.24
0.75
Cutting Mach Operator
2016-12-28
Respirable dust, <.1mg
0
Laborer, Bullgang
2016-12-28
Respirable dust, <.1mg
0
Laborer, Bullgang
2010-07-22
Quartz, respirable, >1% Qtz
0.12
0.32
0.38
Cutting Mach Operator
2010-07-22
Quartz, respirable, >1% Qtz
0.26
0.28
0.93
Cutting Mach Helper
2010-07-22
Quartz, respirable, >1% Qtz
0.16
0.25
0.64
Cutting Mach Helper
2010-07-22
Quartz, respirable, >1% Qtz
0.12
0.3
0.40
Cutting Mach Operator
Area samples (mill and shop air)
Last sampled: 2014-05-14, 12 years ago
2
samples
Show the individual readings (2)
Date
Contaminant
Concentration
Limit
Conc / limit
Area sampled
2014-05-14
Respirable dust, <.1mg
0
SF ACTIVE MINING
2014-05-14
Respirable dust, <.1mg
0
SF ACTIVE MINING
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.
Stone Wholesale Brownstone Quarry recorded 0.00 reportable injury cases per 100 full-time workers in 2025.
Injury rate, 2025
ⓘThis rate is reportable injury cases per 100 full-time-equivalent workers per year, computed as 200,000 times cases divided by MSHA operator-reported employee-hours. Cases are injuries MSHA graded degree 01 through 07; accident-only events that hurt no one are excluded, and so are contractor injuries, whose hours do not attach to a single mine. Rates begin in 2000, when quarterly employment reporting starts, and are withheld below 20,000 hours in a year.
0.00
total case rate
0.00
days-away rate
0.000
fatality rate
Below average. The US metal and nonmetal mining average was 1.65 and the all-US-mining average was 1.97 cases per 100 workers.
In Colorado, metal and nonmetal mining averaged 1.64 cases per 100 workers that year.
Under 100,000 employee-hours were reported that year, so a single case moves the rate by two or more. Read the figure as approximate.
Year
total case rate
days-away
fatal
2025 *
0.00
0.00
0.000
2024 *
0.00
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
0.00
0.00
0.000
2021 *
4.02
4.02
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2018 *
0.00
0.00
0.000
* Fewer than 100,000 employee-hours that year; the rate is less stable.
Source: injury cases from MSHA accident and injury records; employee-hours from MSHA quarterly employment reports. Rate is cases per 100 full-time-equivalent workers, operator employees only.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
21
2025
26
2024
26
2023
27
2022
26
2021
25
2020
23
2019
22
2018
22
2017
21
2016
17
2015
13
2014
13
2013
10
2012
9
2011
7
2010
7
2009
9
2008
9
Source: MSHA quarterly employment and production, updated weekly.
Stone Wholesale Brownstone Quarry sits in Larimer 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.
Larimer County, Colorado · Population 363,561
0.6%
Mining share of county employment
$91,364
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 Q1
11,088
6
2
541.1
2025 Q4
12,240
0
0
0.0
2025 Q3
11,435
0
0
0.0
2025 Q2
14,332
0
0
0.0
2025 Q1
10,667
2
0
187.5
2024 Q4
13,719
0
0
0.0
2024 Q3
15,112
0
0
0.0
2024 Q2
18,223
3
0
164.6
Show 62 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q1
13,107
4
0
305.2
2023 Q4
14,115
1
0
70.8
2023 Q3
14,246
8
3
561.6
2023 Q2
16,249
0
0
0.0
2023 Q1
12,127
7
0
577.2
2022 Q4
13,403
0
0
0.0
2022 Q3
18,353
0
0
0.0
2022 Q2
16,233
3
1
184.8
2022 Q1
10,652
6
2
563.3
2021 Q4
13,297
0
0
0.0
2021 Q3
13,356
0
0
0.0
2021 Q2
12,238
7
1
572.0
2021 Q1
10,852
4
1
368.6
2020 Q4
11,179
0
0
0.0
2020 Q3
11,061
0
0
0.0
2020 Q2
11,495
0
0
0.0
2020 Q1
6,665
2
0
300.1
2019 Q4
10,001
0
0
0.0
2019 Q3
11,544
1
0
86.6
2019 Q2
9,878
0
0
0.0
2019 Q1
8,059
2
0
248.2
2018 Q4
11,023
0
0
0.0
2018 Q3
12,747
3
1
235.3
2018 Q2
14,343
0
0
0.0
2018 Q1
8,168
4
1
489.7
2017 Q4
12,857
0
0
0.0
2017 Q3
10,403
0
0
0.0
2017 Q2
12,988
2
1
154.0
2017 Q1
9,097
0
0
0.0
2016 Q4
10,091
4
0
396.4
2016 Q3
11,510
0
0
0.0
2016 Q2
7,173
0
0
0.0
2016 Q1
3,905
1
0
256.1
2015 Q4
5,703
2
0
350.7
2015 Q3
5,660
5
2
883.4
2015 Q2
4,979
0
0
0.0
2015 Q1
4,501
0
0
0.0
2014 Q4
7,183
0
0
0.0
2014 Q3
8,495
0
0
0.0
2014 Q2
8,540
3
0
351.3
2014 Q1
4,206
11
3
2615.3
2013 Q4
4,639
0
0
0.0
2013 Q3
4,657
0
0
0.0
2013 Q2
5,004
1
0
199.8
2013 Q1
3,493
0
0
0.0
2012 Q4
3,765
4
2
1062.4
2012 Q3
3,145
5
0
1589.8
2012 Q2
3,996
0
0
0.0
2012 Q1
3,608
3
0
831.5
2011 Q4
2,907
0
0
0.0
2011 Q3
3,638
0
0
0.0
2011 Q2
3,156
0
0
0.0
2011 Q1
2,272
3
0
1320.4
2010 Q4
2,688
5
0
1860.1
2010 Q3
4,275
8
4
1871.3
2010 Q2
3,883
0
0
0.0
2010 Q1
3,360
0
0
0.0
2009 Q4
4,320
1
0
231.5
2009 Q3
4,320
0
0
0.0
2009 Q2
4,320
7
2
1620.4
2009 Q1
4,320
0
0
0.0
2008 Q4
4,320
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
1 on file
2021 · 1 incident
June 14, 2021CO · Metal/Non-Metalstone finishing and sizing personnel, stone/rock cut/polish/saw operator, splitter, cutter, trimmerHANDLING OF MATERIALS