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: 206 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Busque Quarry has $2K 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.
$2K
proposed penalties
$2K
current assessed
$2K
paid to date
$0
outstanding
20 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2024-10-23.
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: 2026-07-15
0%
of limit-tested samples over the exposure limit
6
samples
1
limit-tested
Most sampled contaminants
Respirable dust, <.1mg5
Quartz, respirable, >1% Qtz1
Show the individual readings (6)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-07-15
Respirable dust, <.1mg
0
Front-end Loader Operator
2024-05-08
Respirable dust, <.1mg
0
Front-end Loader Operator
2020-07-28
Respirable dust, <.1mg
0
Front-end Loader Operator
2015-05-13
Respirable dust, <.1mg
0
Front-end Loader Operator
2011-07-13
Respirable dust, <.1mg
0
Backhoe Operator
2011-07-13
Quartz, respirable, >1% Qtz
0.13
1.22
0.11
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
2
2025
2
2024
2
2023
2
2022
2
2021
2
2020
3
2019
2
2018
3
2017
3
2016
3
2015
3
2014
2
2013
3
2012
4
2011
0
2010
0
Source: MSHA quarterly employment and production, updated weekly.
Busque Quarry sits in Cumberland County, Maine, 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.
Cumberland County, Maine · Population 305,940
0.0%
Mining share of county employment
$92,983
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
801
0
0
0.0
2026 Q1
2
0
0
0.0
2025 Q4
351
0
0
0.0
2025 Q3
451
0
0
0.0
2025 Q2
601
0
0
0.0
2025 Q1
2
0
0
0.0
2024 Q4
301
1
0
3322.3
2024 Q3
1,251
0
0
0.0
Show 54 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
501
0
0
0.0
2024 Q1
2
0
0
0.0
2023 Q4
251
0
0
0.0
2023 Q3
1,051
1
0
951.5
2023 Q2
680
0
0
0.0
2023 Q1
2
0
0
0.0
2022 Q4
201
0
0
0.0
2022 Q3
576
0
0
0.0
2022 Q2
321
0
0
0.0
2022 Q1
2
0
0
0.0
2021 Q4
151
0
0
0.0
2021 Q3
1,101
0
0
0.0
2021 Q2
745
0
0
0.0
2021 Q1
2
0
0
0.0
2020 Q4
1,001
0
0
0.0
2020 Q3
1,251
0
0
0.0
2020 Q2
728
0
0
0.0
2020 Q1
2
0
0
0.0
2019 Q4
996
0
0
0.0
2019 Q3
624
0
0
0.0
2019 Q2
534
0
0
0.0
2019 Q1
2
0
0
0.0
2018 Q4
736
0
0
0.0
2018 Q3
774
0
0
0.0
2018 Q2
1,023
1
0
977.5
2018 Q1
2
0
0
0.0
2017 Q4
931
0
0
0.0
2017 Q3
1,351
0
0
0.0
2017 Q2
491
0
0
0.0
2017 Q1
2
0
0
0.0
2016 Q4
721
0
0
0.0
2016 Q3
740
0
0
0.0
2016 Q2
721
0
0
0.0
2016 Q1
2
0
0
0.0
2015 Q4
707
0
0
0.0
2015 Q3
609
0
0
0.0
2015 Q2
626
2
1
3194.9
2015 Q1
2
0
0
0.0
2014 Q4
531
0
0
0.0
2014 Q2
2
0
0
0.0
2014 Q1
2
0
0
0.0
2013 Q4
2
0
0
0.0
2013 Q3
875
0
0
0.0
2013 Q2
363
1
0
2754.8
2013 Q1
1
0
0
0.0
2012 Q4
1,539
0
0
0.0
2012 Q3
1,221
0
0
0.0
2012 Q2
2,086
1
0
479.4
2011 Q4
0
0
0
2011 Q3
0
8
2
2011 Q2
440
0
0
0.0
2011 Q1
0
0
0
2010 Q4
0
0
0
2010 Q3
0
4
0
No fatalities recorded at this mine.
Reportable incidents
1 on file
2011 · 1 incident
September 28, 2011ME · Metal/Non-MetalsuperintendentOTHER