Jefferson Materials Co has $5K in proposed MSHA penalties and $0 outstanding across 2 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
10
Years on record
1988–2025
Latest incident
Oct 2025
Compliance record
MSHA citations since 2001
37
citations
4
significant & substantial
$4,712
proposed penalties
$4,375
paid to date
93% of proposed penalties paid to date, a $337 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: 717 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Jefferson Materials Co has $5K in proposed MSHA penalties and $0 outstanding across 2 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.
$5K
proposed penalties
$4K
current assessed
$4K
paid to date
$0
outstanding
37 assessments are final orders; 2 contested dockets.
Of $565 in penalties contested before the Commission, $228 was upheld in final decisions.
As of the most recent assessment on 2024-11-07.
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.
2citations taken to the federal commission · 5% of citations on record
Settled
2 · 100%
60%
Penalty reduction in decided contests
$565 proposed, $228 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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2017-07-26.
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: 2024-06-27
0%
of limit-tested samples over the exposure limit
18
samples
4
limit-tested
Most sampled contaminants
Respirable dust, <.1mg12
Quartz, respirable, >1% Qtz4
Unlisted Particulate, respirable, <1% Qtz2
Show the individual readings (18)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2024-06-27
Respirable dust, <.1mg
0
Truck Driver
2024-06-27
Respirable dust, <.1mg
0
Truck Driver
2024-06-27
Respirable dust, <.1mg
0
Utility Man
2024-06-27
Respirable dust, <.1mg
0
Truck Driver
2023-12-12
Respirable dust, <.1mg
0
Laborer, Bullgang
2023-12-12
Respirable dust, <.1mg
0
Front-end Loader Operator
2019-04-30
Quartz, respirable, >1% Qtz
0.21
0.58
0.36
Truck Driver
2019-04-30
Quartz, respirable, >1% Qtz
0.15
0.54
0.28
Backhoe Operator
2019-04-30
Respirable dust, <.1mg
0
Crusher Oper/Worker
2019-04-30
Quartz, respirable, >1% Qtz
0.2
0.53
0.38
Bulldozer Operator
2017-04-19
Respirable dust, <.1mg
0
Bulldozer Operator
2017-04-19
Respirable dust, <.1mg
0
Washer Operator
2013-10-23
Unlisted Particulate, respirable, <1% Qtz
0.2
Utility Man
2013-10-23
Respirable dust, <.1mg
0
Supervisor, Co. Official
2013-10-23
Respirable dust, <.1mg
0
Front-end Loader Operator
2009-05-12
Quartz, respirable, >1% Qtz
0.37
0.51
0.73
Utility Man
2001-10-02
Unlisted Particulate, respirable, <1% Qtz
0.34
Front-end Loader Operator
2001-10-02
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.
Jefferson Materials Co recorded 7.48 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.
7.48
total case rate
7.48
days-away rate
0.000
fatality rate
Above 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 Ohio, metal and nonmetal mining averaged 1.56 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 *
7.48
7.48
0.000
2024 *
0.00
0.00
0.000
2023 *
0.00
0.00
0.000
2022 *
8.25
0.00
0.000
2021 *
0.00
0.00
0.000
2020 *
0.00
0.00
0.000
2019 *
0.00
0.00
0.000
2018 *
9.56
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
10
2025
11
2024
11
2023
12
2022
11
2021
13
2020
15
2019
16
2018
9
2017
9
2016
6
2015
6
2014
6
2013
6
2012
7
2011
7
2010
7
2009
9
2008
9
2007
10
2006
8
2005
7
2004
9
2003
9
2002
8
2001
7
2000
8
Source: MSHA quarterly employment and production, updated weekly.
Jefferson Materials Co sits in Portage County, Ohio, where the Census mining category is 0.4% 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.
Portage County, Ohio · Population 161,421
0.4%
Mining share of county employment
$72,822
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
Stoneco Inc. · Fall to the walkway or working surface
Standing at ground level putting a bar back on grizzly screen. Was trying to guide the bar in to the bolt holes, lost footing and fell back to the ground and the bar fell on employee. Lower back/butt sore.
2022 · 1 incident
January 20, 2022OH · Metal/Non-Metaldraftsman, surveyor/transit work supervisorSLIP OR FALL OF PERSON
Stoneco Inc. · Fall to the walkway or working surface
Ice on ground after snow storm and thaw/freeze. Worker was walking to pick up truck and fell. As EE was falling EE tried to put arm out to catch self which caused a Humerus fracture to right arm.
2018 · 1 incident
July 3, 2018OH · Metal/Non-Metalbulldozer operator, universal operator, heavy equipment operator, operating engineerDISORDERS (PHYSICAL AGENTS)
Installing hydro cones. Wearing gloves, EE put right index and middle finger in between the washer and the cone EE's fingers still between the washer and the cone base were crushed when the impact unexpectedly tightened. EE was treated for a crushing injury to right middle finger and a fracture to the tip of right index finger.
2000 · 1 incident
March 21, 2000OH · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDLING OF MATERIALS
DISCONNECTING HYDRAULIC OILLINES. USED OIL DRY EVERYWHERE BUT ON OPEN GRATE - WOULDN'T WORK. STEPPEDON OPEN GRATE, SLIPPED AND FELL ON SHOULDER AND TORE MUSCLES IN ROTATOR CUFF.
April 7, 1995OH · Metal/Non-Metalassayer, geologist, metallurgist, engineer, engineer managementSLIP OR FALL OF PERSON