American Gilsonite Company · Struck by... (Not Elsewhere Classified)
A miner was installing a 6-inch 60D nail into a board. The miner missed the nail and struck their left thumb causing a crushing injury that required stitches.
Bonanza Process Plant: 37 MSHA citations Metal/Non-Metal
Bonanza Process Plant has $6K in proposed MSHA penalties and $153 outstanding across 0 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 6
- Years on record
- 2023–2026
- Latest incident
- Jun 2026
Compliance record
MSHA citations since 2020
37
citations
1
significant & substantial
$5,552
proposed penalties
$5,399
paid to date
97% of proposed penalties paid to date, a $153 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2020
14
inspections on record
521
inspection hours
n/a
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: 521 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Bonanza Process Plant has $6K in proposed MSHA penalties and $153 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.$6K
proposed penalties
$6K
current assessed
$5K
paid to date
$153
outstanding
37 assessments are final orders; 0 contested dockets.
As of the most recent assessment on 2026-02-26.
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.2.7%
significant & substantial
0.0%
high negligence or reckless
2.7%
reasonably likely or greater
64.9%
permanently disabling or fatal if injury occurs
Negligence coding: 0.0% none, 16.2% low, 83.8% moderate, 0.0% high, 0.0% reckless.
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: 2025-03-11
ⓘ
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.2
samples
0
limit-tested
Most sampled contaminants
- Unlisted Particulate, respirable, <1% Qtz2
Show the individual readings (2)
| Date | Contaminant | Concentration | Limit | Conc / limit | Occupation |
|---|---|---|---|---|---|
| 2025-03-11 | Unlisted Particulate, respirable, <1% Qtz | 1 | Front-end Loader Operator | ||
| 2025-03-11 | Unlisted Particulate, respirable, <1% Qtz | 0.54 | Forklift 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.
Bonanza Process Plant recorded 16.90 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.16.90
total case rate
0.00
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 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 * | 16.90 | 0.00 | 0.000 |
| 2024 * | 4.53 | 0.00 | 0.000 |
| 2023 * | 4.70 | 0.00 | 0.000 |
| 2022 * | 0.00 | 0.00 | 0.000 |
| 2021 * | 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.
Ownership history
- American Gilsonite Company 2020 to present
Source: MSHA controller and operator history, updated weekly.
Workforce and production
| Year | Employees |
|---|---|
| 2026 | 24 |
| 2025 | 22 |
| 2024 | 21 |
| 2023 | 19 |
| 2022 | 18 |
| 2021 | 16 |
| 2020 | 12 |
Source: MSHA quarterly employment and production, updated weekly.
Bonanza Process Plant sits in Uintah County, Utah, where the Census mining category is 12.5% 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.Uintah County, Utah · Population 36,458
12.5%
Mining share of county employment
$69,861
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 | 13,088 | 0 | 0 | 0.0 |
| 2026 Q1 | 13,088 | 3 | 0 | 229.2 |
| 2025 Q4 | 10,012 | 0 | 0 | 0.0 |
| 2025 Q3 | 10,492 | 0 | 0 | 0.0 |
| 2025 Q2 | 7,836 | 4 | 0 | 510.5 |
| 2025 Q1 | 7,153 | 2 | 0 | 279.6 |
| 2024 Q4 | 9,240 | 0 | 0 | 0.0 |
| 2024 Q3 | 11,161 | 6 | 1 | 537.6 |
Show 17 earlier quarters Hide earlier quarters
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2024 Q2 | 11,699 | 0 | 0 | 0.0 |
| 2024 Q1 | 12,068 | 0 | 0 | 0.0 |
| 2023 Q4 | 11,211 | 2 | 0 | 178.4 |
| 2023 Q3 | 10,820 | 3 | 0 | 277.3 |
| 2023 Q2 | 10,449 | 0 | 0 | 0.0 |
| 2023 Q1 | 10,042 | 0 | 0 | 0.0 |
| 2022 Q4 | 11,274 | 6 | 0 | 532.2 |
| 2022 Q3 | 10,877 | 3 | 0 | 275.8 |
| 2022 Q2 | 8,361 | 0 | 0 | 0.0 |
| 2022 Q1 | 9,481 | 1 | 0 | 105.5 |
| 2021 Q4 | 8,452 | 0 | 0 | 0.0 |
| 2021 Q3 | 9,031 | 1 | 0 | 110.7 |
| 2021 Q2 | 7,691 | 0 | 0 | 0.0 |
| 2021 Q1 | 6,762 | 3 | 0 | 443.7 |
| 2020 Q4 | 6,331 | 0 | 0 | 0.0 |
| 2020 Q3 | 6,042 | 0 | 0 | 0.0 |
| 2020 Q2 | 7,500 | 3 | 0 | 400.0 |
No fatalities recorded at this mine.
Reportable incidents
6 on file2026 · 1 incident
2025 · 3 incidents
American Gilsonite Company · Caught in, under or between (Not Elsewhere Classified)
A miner was turning a pipe with a pipe wrench in one hand, and their other hand on the top of the pipe where an elbow was located. The pipe turned faster than the miner expected, and the miners thumb got caught in the elbow, bending it back.
American Gilsonite Company · Caught in, under or between a moving and a stationary object
A miner was conducting an inspection on an agitator. As the agitator turned, a bolt contacted the miner's finger, resulting in lacerations.
August 26, 2025
UT · Metal/Non-Metal
maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech
HANDTOOLS (NONPOWERED)
American Gilsonite Company · Struck by... (Not Elsewhere Classified)
A miner was stripping electrical wires with a utility knife. The knife came out of the insulation as the miner pulled it down and came into contact with EE's right wrist, cutting the arm.
2024 · 1 incident
March 27, 2024
UT · Metal/Non-Metal
haul/off road/coal/ore/pit/quarry/rock/rubber tire truck driver, transportation truck driver
STRIKING OR BUMPING
American Gilsonite Company · Struck against stationary object
Employee was changing to go home. Took sock off, stood up and hit head on open locker door.
2023 · 1 incident
September 29, 2023
UT · Metal/Non-Metal
maintenance man, mechanic, repair/serviceman, boilermaker, fueler, tire tech, field service tech
HANDLING OF MATERIALS
American Gilsonite Company · Caught in, under or between a moving and a stationary object
Heavy ring fell forward while being removed, employee tried to stop it and pinched a finger between two pieces of metal.