Gravel Pit-Thornton has $21K in proposed MSHA penalties and $0 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
2009
Latest incident
Aug 2009
Compliance record
MSHA citations since 2004
98
citations
23
significant & substantial
$20,643
proposed penalties
$20,643
paid to date
100% of proposed penalties paid to date, a $0 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: 387 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: 2011-11-22.
On record since 2011.
Source: MSHA imminent-danger order records, updated weekly.
Gravel Pit-Thornton has $21K 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.
$21K
proposed penalties
$21K
current assessed
$21K
paid to date
$0
outstanding
97 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-08-06.
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: 2022-05-24, 4 years ago
0%
of limit-tested samples over the exposure limit
4
samples
2
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz2
Respirable dust, <.1mg2
Show the individual readings (4)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2022-05-24
Quartz, respirable, >1% Qtz
0.2
0.51
0.39
Front-end Loader Operator
2017-08-23
Respirable dust, <.1mg
0
Front-end Loader Operator
2017-08-23
Quartz, respirable, >1% Qtz
0.3
0.51
0.59
Front-end Loader Operator
2013-11-07
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.
Source: MSHA controller and operator history, updated weekly.
Workforce and production
Year
Employees
2026
2
2025
3
2024
2
2023
2
2022
2
2021
2
2020
2
2019
2
2018
3
2017
3
2016
3
2015
3
2014
2
2013
2
2012
2
2011
2
2010
2
2009
23
2008
3
2007
3
2006
2
2005
2
2004
3
Source: MSHA quarterly employment and production, updated weekly.
Gravel Pit-Thornton sits in Penobscot 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.
Penobscot County, Maine · Population 153,571
0.0%
Mining share of county employment
$63,248
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
2 ee were conducting normal maintenance, replacing screens, greasing and servicing which includes a lot of manual labor. They did nothing outside of the normal practices. These activities was too strenuous for one and he was advised to take time off in order to rest his back muscles.