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: 476 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Ober Quarry has $10K 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.
$10K
proposed penalties
$10K
current assessed
$10K
paid to date
$0
outstanding
58 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2025-08-11.
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: 2025-08-12
15%
of limit-tested samples over the exposure limit
17
samples
13
limit-tested
Most sampled contaminants
Quartz, respirable, >1% Qtz132 over
Respirable dust, <.1mg3
Unlisted Particulate, respirable, <1% Qtz1
Show the individual readings (17)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2014-06-03
Quartz, respirable, >1% Qtz
0.95
0.76
1.25
Front-end Loader Operator
2014-04-02
Quartz, respirable, >1% Qtz
1.18
0.56
2.11
Front-end Loader Operator
2025-08-12
Quartz, respirable, >1% Qtz
0.5
2.22
0.23
Front-end Loader Operator
2018-11-07
Respirable dust, <.1mg
0
Front-end Loader Operator
2018-11-07
Respirable dust, <.1mg
0
Backhoe Operator
2015-10-01
Quartz, respirable, >1% Qtz
0.61
0.86
0.71
Shovel Operator
2014-08-21
Unlisted Particulate, respirable, <1% Qtz
0.26
Front-end Loader Operator
2014-04-02
Quartz, respirable, >1% Qtz
0.42
0.52
0.81
Front-end Loader Operator
2014-04-02
Quartz, respirable, >1% Qtz
0.3
0.39
0.77
Backhoe Operator
2014-04-02
Quartz, respirable, >1% Qtz
0.41
0.55
0.75
Backhoe Operator
2011-04-26
Quartz, respirable, >1% Qtz
0.28
0.47
0.60
Front-end Loader Operator
2011-04-26
Quartz, respirable, >1% Qtz
0.24
0.51
0.47
Front-end Loader Operator
2011-04-26
Quartz, respirable, >1% Qtz
0.19
0.5
0.38
Backhoe Operator
2011-04-26
Respirable dust, <.1mg
0
Utility Man
2011-04-26
Quartz, respirable, >1% Qtz
0.4
0.57
0.70
Front-end Loader Operator
2009-10-15
Quartz, respirable, >1% Qtz
1.17
1.46
0.80
Crusher Oper/Worker
2009-10-15
Quartz, respirable, >1% Qtz
0.33
0.5
0.66
Shovel 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.
Ober Quarry recorded 0.00 reportable injury cases per 100 full-time workers in 2012.
Injury rate, 2012
ⓘ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
No reportable injury cases in any year shown. Employee-hours were reported in each of those years, so these are true zeros rather than missing data. Citations, listed in the compliance record above, are inspector-found violations and are counted separately from worker injuries.
Below average. The US metal and nonmetal mining average was 2.48 and the all-US-mining average was 2.96 cases per 100 workers.
In Pennsylvania, metal and nonmetal mining averaged 3.34 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
2012 *
0.00
0.00
0.000
2011 *
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
2
2025
1
2024
5
2023
3
2022
3
2021
3
2020
4
2019
4
2018
4
2017
2
2016
1
2015
2
2014
5
2013
3
2012
9
2011
13
2010
3
2009
3
Source: MSHA quarterly employment and production, updated weekly.
Ober Quarry sits in Bradford County, Pennsylvania, where the Census mining category is 1.9% 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.
Bradford County, Pennsylvania · Population 59,971
1.9%
Mining share of county employment
$62,482
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
When drilling, the driller needs to lift drill rods an place on drill mast to add length, when driller was doing this he felt what he thought was a muscle "tweek". This feeling did not improve, went to doctor and found out he had a hernia.