Ash Grove Tooele Plant has $6K in proposed MSHA penalties and $777 outstanding across 1 contested dockets, plus health sampling and the full incident record.
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Fatalities
0
Total incidents
2
Years on record
2023–2026
Latest incident
Jun 2026
Compliance record
MSHA citations since 2022
29
citations
3
significant & substantial
$5,997
proposed penalties
$5,220
paid to date
87% of proposed penalties paid to date, a $777 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: 187 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Ash Grove Tooele Plant has $6K in proposed MSHA penalties and $777 outstanding across 1 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.
$6K
proposed penalties
$6K
current assessed
$5K
paid to date
$777
outstanding
26 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2026-02-04.
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.
3citations taken to the federal commission · 10% of citations on record
Still open
3 · 100%
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 A dismissed or defaulted contest leaves the citation standing as issued; a vacated or withdrawn citation is removed from the violation record.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 2026-04-12.
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: 2026-02-05
9
samples
0
limit-tested
Most sampled contaminants
Cristobalite, respirable3
Respirable dust, <.1mg3
Unlisted Particulate, respirable, <1% Qtz3
Show the individual readings (9)
Date
Contaminant
Concentration
Limit
Conc / limit
Occupation
2026-02-05
Cristobalite, respirable
0.07
Lab Technician
2026-02-05
Respirable dust, <.1mg
0
Utility Man
2026-02-05
Cristobalite, respirable
0
Utility Man
2026-02-05
Respirable dust, <.1mg
0
Lab Technician
2026-02-05
Respirable dust, <.1mg
0
Truck Loader
2026-02-05
Cristobalite, respirable
0
Truck Loader
2022-11-16
Unlisted Particulate, respirable, <1% Qtz
0.2
Ball Mill Operator
2022-11-16
Unlisted Particulate, respirable, <1% Qtz
0.31
Truck Loader
2022-11-16
Unlisted Particulate, respirable, <1% Qtz
1.06
Mechanic
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.
Ash Grove Tooele Plant 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 Utah, metal and nonmetal mining averaged 1.89 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 *
4.02
0.00
0.000
2022 *
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
23
2025
22
2024
24
2023
27
2022
22
2021
21
Source: MSHA quarterly employment and production, updated weekly.
Ash Grove Tooele Plant sits in Tooele County, Utah, where the Census mining category is 1.8% 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.
Tooele County, Utah · Population 76,648
1.8%
Mining share of county employment
$101,846
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
11,091
0
0
0.0
2026 Q1
10,823
8
2
739.2
2025 Q4
10,570
0
0
0.0
2025 Q3
10,779
3
0
278.3
2025 Q2
10,471
0
0
0.0
2025 Q1
3,324
2
0
601.7
2024 Q4
10,582
0
0
0.0
2024 Q3
10,892
0
0
0.0
Show 12 earlier quartersHide earlier quarters
Quarter
Hours worked
Citations
S&S
Per 1M hrs
2024 Q2
12,405
1
0
80.6
2024 Q1
12,401
2
0
161.3
2023 Q4
12,450
1
0
80.3
2023 Q3
13,812
0
0
0.0
2023 Q2
12,105
3
1
247.8
2023 Q1
11,410
0
0
0.0
2022 Q4
13,243
4
0
302.0
2022 Q3
13,243
5
0
377.6
2022 Q2
10,113
0
0
0.0
2022 Q1
10,257
0
0
0.0
2021 Q4
8,526
0
0
0.0
2021 Q3
11,732
0
0
0.0
No fatalities recorded at this mine.
Reportable incidents
2 on file
2026 · 1 incident
June 10, 2026UT · Metal/Non-Metallaborer, blacksmith, bull gang, parts runner, roustabout, pick-up man, pitmanHANDLING OF MATERIALS
Production employee was performing the routine task of sampling from a customer loadout truck. Employee pulled/strained right shoulder. Employee reported incident the following morning. Employee was taken to clinic and given a sling and 800mg ibuprofen. Employee is on restricted duty for right shoulder strain until 6/25/2026.
2023 · 1 incident
February 27, 2023UT · Metal/Non-Metalwarehouseman, bagger, palletizer/stacker, store keeper, packager, fabricator, cleaning plant operatorHANDLING OF MATERIALS